Datasets:

cwinkler

/

patents_green_plastics

like 1

an improved plastic container assembly is disclosed , for use such as a paint can , which comprises a bottom container portion , a ring portion which fits within the upper rim of the bottom container portion , and a lid which seals within said ring portion to close the container . the ring portion of the invention interlocks within the inner circumference of the bottom container portion to form a tight fit and a good seal to retain the contents of the container .

an oxygen scavenger film includes a layer including an oxygen scavenger , and a layer including a cyclic olefin copolymer . an oxygen scavenger film includes a layer including a blend of an oxygen scavenger , and a cyclic olefin copolymer . a method of triggering an oxygen scavenger film includes providing an oxygen scavenger film including a layer including an oxygen scavenger , and a layer including a cyclic olefin copolymer ; and subjecting the oxygen scavenger film to a dosage of actinic radiation effective to trigger the oxygen scavenger . a method of triggering an oxygen scavenger film includes providing an oxygen scavenger film including a layer including a blend of an oxygen scavenger and a cyclic olefin copolymer ; and subjecting the oxygen scavenger film to a dosage of actinic radiation effective to trigger the oxygen scavenger .

an apparatus and methods for forming micro spike thermoplastic liners and micro spike thermoplastic liners formed thereby are provided . a textured thermoplastic liner having at least one roughened surface with a plurality of irregularly shaped projections extending therefrom is disclosed . the thermoplastic liner of the subject invention is formed by using a calendering roll having a generally cylindrically shaped body with a non - smooth outer surface and a plurality of blind apertures , each having an irregularly shaped opening formed coextensively with the non - smooth surface . the liner is formed by having the non - smooth surface of the calendering roll impress a roughened pattern onto the liner and simultaneously form the plurality of irregularly shaped projections . the calendering roll is formed by initially drilling a plurality of blind apertures and , subsequently , roughening the outer surface of the roll such that the openings of each of the apertures are each caused to be irregularly shaped .

the present invention provides new classes of phenol compounds , including those derived from tyrosol and analogues , useful as monomers for preparation of biocompatible polymers , and biocompatible polymers prepared from these monomeric phenol compounds , including novel biodegradable and / or bioresorbable polymers . these biocompatible polymers or polymer compositions with enhanced bioresorbabilty and processibility are useful in a variety of medical applications , such as in medical devices and controlled - release therapeutic formulations . the invention also provides methods for preparing these monomeric phenol compounds and biocompatible polymers .

a method and apparatus are provided for maintaining polymer particles in readily recoverable , discrete form , and for injecting the particles into a pipeline hydrocarbon by disposing particulate polymer within a storage hopper having a cone bottom and an auger extending upwardly from the bottom , rotating the auger to cause the polymer particles to revolve in the hopper , reversing the rotation of the auger to pass polymer particles downwardly into a mixing chamber below the hopper , the particles passing through a rotary metering valve , or optionally , a bin activator , intermediate storage and rotary metering valve at the upper end of the chamber , simultaneously spraying a liquid such as oil or water tangentially in the chamber optionally agitating the chamber and removing a slurry of particulate polymer and the liquid from the chamber and injecting the slurry into a pipeline hydrocarbon .

anti - thrombobenic , anti - microbial compositions containing heparin reacted with quaternary ammonium components and bound with water - insoluble polymers are disclosed . such compositions may also contain additional quaternary ammonium compounds not reacted with heparin and may also contain quaternary ammonium compound reacted with antibiotics .

a method for extracting antineoplastic component from bupleurum scorzonerifolium applicable in treating cell proliferative disorder is proposed . the antineoplastic components of bupleurum scorzonerifolium include at least a y - butyolactone centred heterocyclic compound with a z configuration or e configuration at its carbon 2 position , and molecules , such as chaihulactone , isochaihulactone , chaihulactone analogues or derivatives containing in the heterocyclic compound . from results of cell and molecular biological studies , in vivo animal test , and histological study , it is found that antineoplastic components extracted from bupleurum scorzonerifolium are effective in suppressing a variety of cancer cell growths , inhibiting telomerase activity , as well as effective in killing with high specificity taxol - resistant tumor cells at later stage of chemical therapy , making the components a new choice for anti - cancer agent , anti - hiv agent , or synergistic agent .

a method of preparing substituted acylbenzenes is disclosed . the method comprises reacting selected acylhalides or equivalents with a selected poly - substituted benzene in the presence of an acylating catalyst comprising a perfluoro sulfonic acid polymer .

the invention provides a lenticular lens type three - dimensional image display device and a method of fabricating the device without a need for a clear plastic substrate transposed between the image and lenticular lenses . the device can be obtained by directly printing curable coatings onto the image , making them particularly well suited for volume production . the combination the image printing and application of curable coatings process can be joined together to conduct the single pass - process . the single pass - process allows for flexibility of the printing only selective areas of the substrate . moreover , this process allows the device to be recyclable .

an impact protection reinforcing element has at least one outer surface which is conformed to the contour of a surface of at least one vehicle body part in such a way that it may be positioned with extensive contact against the body part in the area of complementary construction and connected firmly to the body part . provision is made for the impact protection reinforcing element to be formed of a fiber / plastics composite . a method of producing the impact protection reinforcing element uses an injection molding process .

inductors for the induction welding of complicated welding patterns have been produced up to now mostly from copper plates which were provided with slits in the desired patterns by spark - cutting and embedded into plastic material . this method of manufacture is expensive and does not allow production of inductors with a very detailed pattern because , among other things , the slits must have a minimum width determined by the spark - cutting . by making the inductors in accordance with the present invention having a thin copper foil which is applied onto the surface of an insulating material , these difficulties are overcome and the desired inductor pattern can be produced in a simple manner by etching with the help of a suitable acid . this makes possible great accuracy of detail so that detailed inductors , e . g . for the packaging industry , can be manufactured at low costs .

the present invention provides a method of manufacturing a porous chemical mechanical polishing pad comprising focusing a laser beam from a laser into a sintering nozzle and injecting the fluidized thermoplastic particles into the sintering nozzle via an injection port . the method further provides sintering the thermoplastic particles with the laser beam and selectively depositing the sintered thermoplastic particles onto a table to form the polishing pad .

the present invention is to provide an ink jet recording paper which is free from blurring , exhibits a highly developed color and has such a strength as to prevent a laminate film and an ink - receiving layer from being peeled by the wind or rain when the paper is posted outdoors after the appropriate film is laminated . the ink jet recording paper is provided with an ink - receiving layer , containing at least a resin and a pigment , on a substrate , wherein major components forming an anchor coating layer of the receiving layer are a styrene / acryl copolymer resin having a glass transition point of 0 ° c . or more and 20 ° c . or less and calcium carbonate .

a process and system is provided for making a connection between two fluid - filled plastic tubes that ensures total containment of potentially dangerous fluids and maintaining sterility of the connection . the tubes are folded to remove all fluid from the weld site and positioned to cause the connection to take place in this fluid free zone . each folded section is first cauterized to create a bacteria free zone , the tubes are slit in the zone , and cauterized a second time to insure sterility and melt the tube ends . the tubes are urged together and as the thermoplastic resin cools , a totally contained , sterile weld is formed .

this invention pertains to a sustained release complex of one or more peptides , one or more proteins or a combination thereof immobilized on an absorbable polymer microparticle optionally having an absorbable polymer coating . the microparticle complex of this invention comprises a peptide and / or protein which have at least one amino group and / or at least one carboxyl group per molecule and a solid absorbable polyester microparticle having surface and subsurface carboxylic group or amino groups in sufficient amounts to bind the peptide and / or protein so that the immobilized peptide or protein represent 0 . 1 % to 30 % of the total mass of the microparticle complex . the microparticle complex with immobilized peptide and / or protein are optionally further encased individually or in groups with an absorbable polymer to control , further , the release of the immobilized peptide and / or protein . to control the release of the immobilized peptide and / or protein even further , the encased microparticles can be incorporated into a composition with an absorbable gel - forming liquid that transforms to a flexible gel or semi - solid upon contacting water in the biologic environment .

the invention is a truck bed cover made from thermoplastic material . the top of the truck bed cover has a relatively smooth appearance . the underside of the bed cover comprises a support structure utilizing at least one “ x ”- type support . in the preferred embodiment , four “ x ”- type supports are utilized . a typical bed cover typically weighs less than 75 pounds for greater ease of handling , without loss of structural support strength over fiberglass covers from loads placed on the top of the bed cover .

an apparatus and method for making a grooved plastic spacer for a slotted core type telecommunications cable includes a helically shaped calibration member inserted into each groove after extrusion of the spacer to maintain the shape of the groove until it is sufficiently cooled . a telecommunications cable made according to the method includes a spacer made of plastic having a melt flow index equal to or greater than 0 . 65 g / 10 min .

a process for the production of dish - shaped moldings or hollow bodies of thermoplastic material comprises the step of producing an at least approximately tubular preform by the extrusion of thermoplastic material . the preform is axially divided to form at least one single - layer web of material which is removed from the extrusion head by being engaged by means of a manipulator which spreads and / or straightens the web transversely with respect to the extrusion direction . the web is then transferred to a molding tool by a manipulator for it to be put into its final form in its first heat in the molding tool .

the invention provides a biocompatible copolymer produced by polymerizing a mixture comprising at least one monomer selected from the group consisting of itaconates , acrylates , fumarates and styrenics , at least one ethylenically unsaturated organosiloxane monomer and at least one monomer comprising a poss compound .

the present invention provides a polymer membrane enhanced with cured epoxy resin for use as the outer membrane of biosensors . the membrane includes approximately 30 - 80 % epoxy resin adhesives , 10 - 60 % polymer such as poly , polycarbonate and polyurethane and 0 - 30 % plasticizers and 5 - 15 % surface modifier reagent such as polyethylene oxide - containing block copolymers . utilizing the polymer membrane of the present invention , a three - layered sensing element has been developed . this sensing element will be particularly useful for miniaturized biosensors used for in vitro blood measurements or for continuous in vivo monitoring such as implantable biosensors . this element includes an enzyme layer , an interference - eliminating layer and the novel polymer member of the present invention as the outer polymer layer . this novel sensing element shows excellent response characteristics in solutions and has an extremely long lifetime . this technology is particularly useful for improving the lifetime of implantable biosensors .

a material for removing beta - 2 microglobulin from blood by passing the blood through the material which are hydrophilic and biocompatible a size and a structure selected so as to remove beta - 2 microglobulin from the blood , wherein said material is a porous beaded polydivinylbenzene or polystyrene - co - polydivinylbenzene polymer with a surface of beads and of pores modified so as to prevent adsorption of large proteins and platelets and to minimize activation of blood complement system without affecting noticeably accessibility of an inner absorption space of the beads for beta - 2 microglobulin and middle - sized toxicant molecules , in which polymer surface exposed vinyl groups are chemically modified so as to form different surface exposed functional groups which are hydrophilic and biocompatible .

a dihydrolipoamide dehydrogenase in a germ is recombined . the new dld is applied in a solution to degrade an ether bond of an organic polymer . with the present invention , bioremediation is accomplished without secondary pollution of compounds which have environmental hormones .

multilayer article without an axis of symmetry manufactured by compression moulding of a multilayer charge of molten thermoplastic resins , article having a feed centre corresponding to the point around which the charge is centred in the mould before compression , the distance between said feed centre and the edge of the article , known as the flow length , is variable ; characterized in that , for a given flow length , the greater the flow length , the smaller the average thickness along this length , and vice versa .

a storage locker constructed of recyclable thermoplastic that utilizes insertion tabs and sockets molded into the sides , top , bottom , front and side panels for permanent interlocking without the need of conventional fasteners . the storage locker is assembled on site by inserting the tabs of the appropriate panel into the socket receptacles of an adjoining panel . assembly of a basic locker requires snap attachment of the side walls to the top and bottom panel . a front frame , preassembly with a hinged door panel , is snap attached to the structure to complete the assembly wherein the structure is available for mounting directly to a wall . for a stand alone locker assembly , a perforated rear panel is available for attachment to the rear of the locker by use of locker pins . the rear panel provides aeration and allows various hook placement for hanging items . shelves are available in either fixed or adjustable disposition . sides , top , and bottom panels include provisions for attaching additional lockers in a stacked or gang configuration .

a process for imparting hydrophilic properties to a polymeric membrane by exposing the membrane to an acrylate monomer containing hydrophilic segments , such as ethylene oxide , and a hydrophilic functional group , a diacrylate monomer containing hydrophilic functional groups , and an initiator for facilitating crosslinking and polymerization reactions .

the formation of a cream and gel is described using a biopolymer , such as a polyhydroxyalkanoate , a polylactide , a polylactideglycolide and a polyglycoside , or a derivative thereof , in a latex form with the addition of a binder , which is generally an amphiphilic chemical entity . an hydrophobic domain of the amphiphilic chemical entity interacts with at least one biopolymer forming a water soluble complex , while the hydrophilic domain of the amphiphilic chemical entity maintains the soluble complex in suspension in an aqueous solution , which after proper heating becomes a gel or a cream . as a result , a versatile gel or cream is created with different compositions and textures that are obtained based on the nature of the binder used and the ratio of biopolymers and binder .

these structural profile members , such as handles , supports , frames and legs for ironing boards , indoor and outdoor clothes drying racks , etc ., are obtained from recycled plastic materials . the plastic structural profiles members have as their main component a polymer with a high elastic modulus such as pet , polyamide , abs , etc ., and waste from materials containing fibreglass . the structural profile members are produced by kneading and subsequent extrusion .

in the present specification and claims , three modified cell culture substrates are disclosed for protecting peptide mimetic surfaces used in cell culture technology . the methods are able to retain the functionality of the bioactive species conjugated to the surface . in particular , a vitronectin peptide fragment ac - lys - gly - gly - pro - gln - val - thr - arg - gly - asp - val - phe - thr - met - pro - nh2 was able to facilitate growth and proliferation of undifferentiated human embryonic stem cells after stabilization using 3 different modified cell culture substrates for of protection against gamma irradiation . the modified substrates disclosed in this invention are covalent attachment of the antioxidant molecules ; the use of coatings consisting of anti - oxidants and stabilizers comprising glycoprotiens , sugars , carbohydrates , poly , peptides and hydrophilic polymers ; and a third method wherein the same methionine contained in the bioactive sequence used to facilitate growth and proliferation of human embryonic stem cells was also used as a sacrificial coating to protect the same conjugated sequence against damage by gamma irradiation .

sleeve fabricating apparatus for fabricating cylindrical sleeves from rectangular blanks of a heat - shrinkable thermoplastic material and for transferring the sleeves , in succession , to frustoconical mandrels of a cup - forming machine . the sleeve - fabricating apparatus has a plurality of cylindrical mandrels that are rotatably affixed to a rotary turret . the sleeves are fabricated from rectangular blanks that are cut , in succession , from a web of indefinite length as the web is being unwound from a coil at an unwind stand . each blank is longer than the circumference of the cylindrical mandrel to which it is applied , leaving ends of the blank which overlap , and the overlapped ends are joined to one another by heat - sealing . cups are formed by the cup - forming machine , each cup being formed from one of such sleeves and a disc . the sleeve fabricating apparatus also includes a disc forming mechanism for forming discs and applying the discs , in succession , to the cylindrical mandrels . the rotary turret rotates the cylindrical mandrels , in succession , past a transfer station , where a cylindrical mandrel is approximately aligned with a frustoconical mandrel of the cup - forming machine over a finite , approximately straight lineal path , and a sleeve and a disc are transferred in unison by a transfer mechanism from a cylindrical mandrel of the sleeve fabricating apparatus to a frustoconical mandrel of the cup - forming machine , the sleeve transferred over the small end of the frustoconical mandrel to permit the transfer to take place over a finite period of time .

a drop - on - demand ink jet printing system includes an ink channel having a nozzle orifice through which ink droplets are ejected when ink in the ink channel is subjected to a momentary positive pressure wave . an ink feed passage opens into the ink channel to transport ink into the channel from an ink reservoir . a selectively - actuated valve , associated with the ink feed passage , restricts the flow of ink through the ink feed passage when actuated . the valve is actuated in timed association with the momentary pressure wave , whereby flow of ink past the valve from the ink channel towards the reservoir is inhibited . the ink feed passage may be a microfluidic channel , and the selectively - actuated valve a heater in thermal contact with at least a portion of the associated microfluidic channel , whereby thermally - responsive ink in the ink feed passage can selectively be heated by the heater such that the thermally - responsive ink will be caused to increase in viscosity to thereby restrict backward ink flow through the ink feed passage . the ink may be comprised of a carrier having a tri - block copolymer of poly - poly - poly .

a relief print master is created by a printhead that moves in a slow scan direction . the nozzles of the printhead jet droplets of a polymerisable liquid on a rotating drum . the different nozzles jet droplets simultaneously on different layers that have different diameters . as a result , the droplets jetted by different nozzles travel over different distances before landing . the effect of this is that the droplets undergo different position lag as they land on the different layers . by rotating the printhead in a plane that is orthogonal to the jetting direction this effect can be compensated for .

an apparatus for producing a corrugated foamed plastic sheet includes an extruder and a die provided at the extrusion end of the extruder . the die has a plurality of grooves provided on one of its surfaces which make contact with the foamed sheet being produced . the grooves extending from the resin feed inlet toward the resin exit of the die .

a vehicle plastic body panel such as a vehicle hardtop is formed with an integral reinforcing component including a structural fiber material molded into the body panel . the reinforcing component provides internal structural support for the use of horizontal plastic body panels such as a roof or a hood panel without the panel sagging .

acetal copolymers of trioxane and 1 , 3 - dioxep - 5 - ene having a high degree of crystallinity and specific mole percent incorporations of 1 , 3 - dioxep - 5 - ene are synthesized . the invention also provides a process for producing highly crystalline acetal copolymers by copolymerizing triozane and 1 , 3 - dioxep - 5 - ene and precipitating the copolymer product from solution . the copolymers show much improved stability against halogen degradation .

disclosed are oligonucleotides useful in methods for determining whether a sample contains borrelia afzelii , a spirochete which is a causative agent of lyme disease in humans . these oligonucleotides , which have nucleotide sequences derived from a coding segment of the gene encoding the p24 gene for the outer surface protein of borrelia afzelii , are useful as forward and reverse primers for a polymerase chain reaction using nucleic acids from a biological sample as templates , and as probes for detecting any resultant amplicon . detection of an amplicon indicates the sample contains borrelia afzelii . real - time pcr and detection using florescence resonance energy transfer is disclosed .

the present invention relates to a closed cycle apparatus for the rapid , continuous and waterless dyeing of a textile or plastic material with a dyestuff dissolved or suspended or dispersed in a high boiling solvent for carrying out the dyeing step , after which the dyed textile or plastic material subsequent to cooling is washed with a low boiling liquid and then dried . the apparatus is constructed so as to operate under non - aqueous or substantially non - aqueous conditions with the complete or substantially complete recovery and recycling of the used dyestuff , the used high boiling solvent and the used low boiling wash liquid . in this way , the apparatus can be operated at a relatively low cost and in a completely or substantially completely closed cyclic system with essentially complete recovery and reuse of the treating fluids so as to greatly minimize the cost of operating the dyeing apparatus and also without any pollution of our natural water resources . pollution of many of our rivers and wells has taken place in the past where effluents of a substantially aqueous nature containing serious amounts of polluting substances were discharged into rivers and the like thereby creating environmental problems .

an amide / olefin polymeric film laminate suitable for packaging , water cooking , and storing food within the package is prepared by coextruding polyamide and polyolefin layers to form a laminate and then cross - linking the laminate by irradiation . prior art polyolefin / polyamide laminates delaminate readily when subjected to agitation in hot water , but this tendency is significantly reduced by laminates according to the present invention .

an apparatus for manufacturing products from material which is thermoplastically deformable , as from plastic , comprising :— a mold with at least one mold cavity ;— in the or each mold cavity at least one slide ;— movement means for moving each slide ;— closing means for opening and closing the mold ;— feed means for introducing , with the mold cavity closed , said material in at least substantially plastic condition into the or each mold cavity ; wherein the movement means for moving the slide are arranged for moving said slide forward at a relatively high speed relative to the movement speed of the mold parts upon opening and closing thereof , from a position at least partly retracted from the mold cavity , such that said material , as a result , is displaced in the mold cavity for obtaining the filling thereof , preferably at a speed high such that adiabatic heat development occurs in the or each mold cavity .

a method and apparatus for ablating features from a substrate , such as drilling holes in a polymer substrate for an ink jet printhead , by illuminating the substrate that has passed through a mask that is continuously orbited or moved in a two dimensional pattern . the mask is capable of following a trajectory perpendicular to the angle of the radiation .

the invention provides compounds of formula and pharmaceutically acceptable salts thereof , wherein ya , yb , r1 , r2 , and g are as described in the specification , as well as compositions comprising a compound of formula . the compounds are useful as inhibitors of bacterial rna polymerase and as antibacterial agents .

a non - articulated wiper blade , which is constructed of a wiper strip having a wiper lip , two spring rails and a connecting device , wherein the spring rails engage in lateral longitudinal grooves of the wiper strip that are open towards the outside and are clasped by claw feet of a sheet metal claw of the connecting device from an outer narrow side . the claw feet are bent around the narrow sides of the spring rails during the assembly of the sheet metal claws , wherein at least one layer and / or an intermediate layer of plastic are provided between the claw feet on the one hand and the spring rails on the other hand , which layers are manufactured separately from the wiper strip and are adapted to the claw feet as well as have a high coefficient of friction on their surface towards the sheet metal claw and towards the spring rails .

a method is provided for connecting an upwardly extending member to a support member including the steps of providing a substantially rigid support member and then extruding plastics material to form a hollow component which will include the upwardly extending member , and then forcing the members together such that the hollow component slides over the support member , the hollow member being such that it deforms elastically as it moves relatively over the base member such that the two members are secured together by a combination of interference fit , and the elastic gripping of the support member by the upwardly extending member . the invention includes an article manufactured using the method according to the invention . the article may include a post attached to a base plate and the article may include part of a plastics barrier or fence system .

molecular adsorption to the microfluidic device surfaces can be passively and actively mitigated by mixing certain hydrophilic polymers ( organic polymers with repeating hydrophilic groups — the preferred polymers being amphipathic surfactants — with the sample liquid during or prior to relevant microfluidic operations . nonionic surfactants such as polyoxyethylene sorbitan monooleate and polyoxyethylene octyl phenyl ether are especially effective . high molecular weight polyethylene polymers are also effective . the hydrophilic polymers appear to prevent binding of the fouling molecules to the microfluidic by occupying the surface sites in place of the fouling molecules or by interacting with the fouling molecules to prevent binding of the fouling molecules the surface . when surface adsorption is thus mitigated , microfluidic devices can readily handle samples containing biomolecules to enable active sample concentration , filtering , washing , transport , mixing and other sample handling operations .

the present invention relates to novel thin layers for microsystem techniques and microstructuring . it is an object of the invention to provide thin layers which can be manufactured under less problems and more economically than the previous conventional layers , and which permit the use of existing technologies for microstructuring . the object is realized in that the thin layer is formed of an enzymatically degradable biopolymer in a range of layer thicknesses of from 30 nm to 3 μm . biopolymeric thin layers manufactured according to the invention permit their application , after a respective structurizing , as test assays or in setting up substance libraries .

a system , nozzle assembly , and method for coating a stent with a solvent and polymer are provided . the polymer can include a therapeutic substance or a drug . the polymer and solvent can be discharged from separate tubes disposed within another tube carrying moving air . the polymer and the solvent mix together when they are discharged and are atomized by the air . the ends of the tubes can be concentric with each other .

controlled release systems release at least one pluribioactive antifungal drug exhibiting at least one additional bioactivity from the group consisting of spermiostatic , antineoplastic , antibacterial , antirestenotic and antiviral activities . the drug release system is designed for use as a spermiostatic contraceptive , intravaginal ringed - mesh which may also exhibit antiviral activity , an in situ - forming implant for treating different forms of cancer and topical film for treating or preventing bacterial and fungal infections .

method and apparatus for forming a blow molded plastic container with a mouth and neck portion thereof which is inclined or angled with respect to the body portion of the container , including heating the neck of the container and bending the heated neck of the container .

there are disclosed novel degradable plastic compositions consisting essentially of an organic polymer containing at least one organic chelating agent . the agent is one which chelates metal so as to form a metal complex which acts to accelerate polymer degradation in the presence of oxygen , electromagnetic radiation , and / or elevated temperature . this invention is especially useful in the preparation of degradable packaging materials such as films , bags , containers , etc .

a saw comprises a saw blade having an outer edge , and a diamond - containing coating carried on the outer edge of the saw blade , the saw blade being composed of a synthetic plastic reinforced with a fiber material composed of a plurality of fibers with a volume fraction of 30 - 70 %.

the self fill disposable coffee pod provides a solution to neatly and easily prepare customized single serve coffee pods for use in single serve coffee makers . freshly ground and customized coffee grounds mixtures can be used in the self fill disposable coffee pod without the need to clean after use as it is designed to have an option to be disposable and or compostable . the invention can be manufactured without plastic or non biodegradable components and can be completely biodegradable and yet strong enough to be used as a scoop to fill its cavity with grounds of user &# 39 ; s choice utilizing the quantity desired .

a stopper for holding fluid in a container comprising a body of vulcanized elastomer having a convex surface , and , laminated to the convex surface without adhesive , a thin layer of thermoplastic , which forms a surface intended to contact the fluid and a side of an opening in the container .

a container assembly comprising a container of plastic material adapted for receiving a liquid and including a bottom of convex shape in the central portion of which the material is highly oriented . a stabilizing foot supports the container and for this purpose is welded to the container in the central portion of the bottom thereof whereat the material is highly oriented . the foot includes an annular projection extending downwardly from the portion welded to the container . the projection is hollow and forms an annular support foot including a rim which extends upwardly from the projection into smooth peripheral sliding engagement with the bottom of the container . the support foot is welded to the container while the middle portion of the projection is held against the middle portion of the bottom of the container .

an improved method of coating a solid substrate which is cured at a high temperature for a short period of time with a thermosetting aqueous acrylic polymer is disclosed . the improvement of the invention resides in : the stability of the aqueous dispersion and the particle size of the dispersed particles which are large and uniform . the invention is particularly useful in coil coating applications where it eliminates the problem of solvent popping .

among the conventional processes for producing solid dispersion , the solid dispersion obtained by a solvent method is excellent in terms of solubility and bioavailability of a poorly soluble drug . however , due to frequent uses of organic solvents in the solvent method , problems have arisen such as organic solvent residue in products , environmental pollution and operational safety as well as corporate problems such as capital investment and the like required to avoid such events . the present invention provides a process for preparing pharmaceutical solid preparations without use of organic solvents frequently used in conventional solvent methods . specifically , the present invention provides a process for producing a pharmaceutical solid preparation , which is formulated by spraying a solution wherein a poorly soluble drug is dissolved in a plasticizer , and an aqueous solution and / or water dispersion of a water - soluble polymer from nozzle outlets simultaneously and separately in the process for producing the pharmaceutical solid preparation .

installation for flocculation of water or sludge loaded with suspended matter comprising in succession : a polymer storage hopper , a polymer grinding device , and a line , pipe or other conveyor for transferring the polymer solution to the water or the sludge to be treated . the grinder device includes a wetting cone in which the polymer is poured , and at the bottom end of the cone : a chamber for grinding and removing the dispersed polymer comprising : a rotor , a stator , and a ring fed by a secondary water circuit . a method implementing the installation is also provided .

in order to provide a means that can process organic wastewater via a membrane - separation activated sludge process that is stable over a long period of time , by reducing the quantity of biological polymers that can cause permeability problems , an additive is provided that is added to the activated sludge when treating organic wastewater via a membrane - separation activated sludge process . said additive contains microorganisms that decompose polysaccharides .

a thin , multi - layer , flexible web of self - adhering wrapping material , typically paper , foil , polymer , or metalized polymer having a first layer having indicia on an outfacing major surface , pressure - sensitive or the like adhesive disposed on an opposing major surface , and a selectively removable protective layer over the adhesive . the protective layer is formed from a plurality of individual small , spaced - apart portions that facilitate their removal . alignment indicia may be provided on the protective layer . in alternate embodiments , a chemically activatable adhesive may be used to replace a pressure sensitive adhesive . the wrapping material may be provided in sheets of different sizes or in continuous rolls .

cemented carbide articles produced by tape casting a slurry of ingredients including organic resins and plasticizers , forming the cast tape into a desired shape and firing the tape , are improved by eliminating carbonaceous residue - forming ingredients from the organic portion of the slurry , resulting in reduced porosity of the fired article .

the invention provides a method comprising the steps of providing a poly having one terminal hydroxyl group ; reacting the terminal hydroxyl group of the poly with dicarbonate to form a 1 - benzotriazolylcarbonate ester of the poly ; reacting the 1 - benzotriazolylcarbonate ester of the poly with an amino acid to form an amino acid derivative ; and reacting the amino acid derivative with a biologically active agent under conditions to form a polymer - active agent conjugate .

new biodegradable polyanhydrides are disclosed , which are prepared by homopolymerization of dimer of bile acid , especially lithocholic acid , or bycopolymerization with linear dicarboxylic acid , especially sebacic acid . these biodegradable polyanhydrides have degradation kinetics and a release rate that make them particularly useful for controlled drug release . more specifically , the degradation kinetics of such anhydrides and the release rate of molecules embedded therein make them useful as matrices for controlled drug release systems . the rates of degradation and release can be adjusted by the copolymer composition . the near zero - order kinetrics of release of the drug embedded in the matrices made of such anhydrides , make the same particularly useful since they can deliver an active ingredient at a constant rate for long period of time , avoiding the inauspicious saw - tooth pattern of conventional systemic administration .

the present embodiment relates to a plasticizer , which is fabricated by mixing monomers of biodegradable polymer with bio - molecules subsequently to deal the mixture with thermal treatment . the biodegradable material comprising the plasticizer has high melt index which is contributive for the processing of thermal processing , and the microwave - tolerance and water - resistance of the material makes the material suitable for food packaging .

chelating ligand precursors for the preparation of olefin methathesis catalysts are disclosed . the resulting catalysts are air stable monomeric species capable of promoting various methathesis reactions efficiently , which can be recovered from the reaction mixture and reused . internal olefin compounds , specifically beta - substituted styrenes , are used as ligand precursors . compared to terminal olefin compounds such as unsubstituted styrenes , the beta - substituted styrenes are easier and less costly to prepare , and more stable since they are less prone to spontaneous polymerization . methods of preparing chelating - carbene methathesis catalysts without the use of cucl are disclosed . this eliminates the need for cucl by replacing it with organic acids , mineral acids , mild oxidants or even water , resulting in high yields of hoveyda - type methathesis catalysts . the invention provides an efficient method for preparing chelating - carbene metathesis catalysts by reacting a suitable ruthenium complex in high concentrations of the ligand precursors followed by crystallization from an organic solvent .

the present invention describes a novel antibacterial treatment on textile materials using polymeric core - shell particles dispersing in water . these particles are prepared from a surfactant - free emulsion polymerization according to the method of u . s . pat . no . 6 , 573 , 313 and have average particle sizes in the range of 100 to 1000 nm in diameter . when applied to a textile article , the particles form a uniform coating , which prevents the growth of bacteria and microbes . the treatment does not affect the fabric mechanical properties , hand feeling and appearance . antibacterial activity on cotton is maintained even after 50 times of home laundering .

disclosed is a water - based printing ink composition exhibiting excellently low foaming behavior with sustainability even under adverse conditions of high temperature and intense shearing force encountered in the printing works . the printing ink composition comprises , besides an organic polymer as the binder resin in the form of an aqueous solution or emulsion and a coloring agent , e . g ., dyes and pigments , a silicone - based defoaming composition comprising a polyoxyalkylene - modified polydiorganosiloxane , polydimethylsiloxane , finely divided silica filler and organopolysiloxane resin mainly or solely consisting of monofunctional organosiloxane units and tetrafunctional siloxane units each in a specified weight proportion .

in one embodiment of the invention , a structure for preventing ink shorting of conductors connected to a printhead is provided . the structure includes a layer of insulating material shaped to at least partially encapsulate the conductors on the printhead . the insulating material includes a first surface and a second surface , with each of the surfaces having an adhesive coated thereon . the adhesive includes a polymer of ethylene and glycidyl methacrylate . the adhesive may also further include an acrylic ester . alternatively , a first adhesive may be coated onto a first surface of the insulating material or coverlayer and a second adhesive may be coated onto a second surface of the insulating material or coverlayer . in another embodiment of the invention , a print cartridge for an inkjet printer , including the structure for preventing ink shorting of conductors connected to the printhead is provided .

a microfluidic structure comprising a thermoplastic portion defining a microfluidic recess , a bonding layer on the thermoplastic portion and a siloxane elastomer portion covalently bonded to the bonding layer to seal the microfluidic recess . the microfluidic recess can therefore be formed simply , quickly and cheaply using known injection molding techniques , which are not hampered by the need for a curing step . however , the positive qualities associated with elastomers can be brought to the structure by using this to seal the microchannels . the bonding layer can be formed by silica deposited on the thermoplastic portion using techniques known in the field of optics .

blow - molded thermoplastic articles such as bottles are produced from preforms while measuring the pressure in the article and comparing the measured pressure with standard values . articles having measured pressure values which deviate from standard are rejected .

frying processes utilizing cooking oil at elevated temperatures can cause various degradation effects in the oil including oxidation , hydrolysis and / or polymerization . in the absence of additives to protect the oil , the nutritional profile and cooking performance of degraded oil diminishes the quality of food cooked therein . the disclosed methods and compositions provide beneficial and cost effective improvements in the cooking performance of oil used at elevated temperatures , for example , in food frying equipment .

labels having a permanent section and at least one removable coupon section are made from polymeric sheets or rolls suitable for printing and forming , at high rates of production , blown or injection in - mold labeled plastic containers are based on a polymeric white opaque , transparent , translucent or contact clear substrate monoaxially oriented and having a thickness in the range of 0 . 002 to 0 . 008 inches . the polymer film is reverse pattern - printed with an abhesive coextensive with the detachable portion then overcoated on the container - facing side with a continuous coating of heat activatable adhesive . such sheet or roll can be printed and then cut into individual labels for affixing to the container as part of a in - molding process . recyclable containers are provided at high speed without missing labels or doubled labels due to feeding problems . the labels are firmly adherent , except for the removable coupon , and squeeze - release resistant and the indicia , because , in clear and contact - clear versions , are viewable through the labels themselves , are protected against spillage and abrasion .

an amide / olefin polymeric film laminate suitable for packaging , water cooking , and storing food within the package is prepared by coextruding polyamide and polyolefin layers to form a laminate and then cross - linking the laminate by irradiation . prior art polyolefin / polyamide laminates delaminate readily when subjected to agitation in hot water , but this tendency is significantly reduced by laminates according to the present invention .

a dispensing container is provided for containing and dispensing a viscous candy , gum or like product therefrom , having four molded plastic components , comprising an outer wall member , a bottom member with an upstanding threaded central shaft , a piston engageable with the shaft and upwardly moveable upon rotation of the bottom member , and a one - piece removable cap , with a plurality of openings for discharging of product therefrom .

ossicular replacement prostheses are manufactured from a non - biodegradable shape memory polymer . such prostheses can include torps , porps , and incudo - stapedial joints . the prostheses are reshaped upon application of a stimulus to capture a portion of one or more ossicles . the force of capture of a reshaped polymeric prosthesis is less than a comparable reshaped shape memory alloy prosthesis and thereby prevents recipient discomfort and / or pressure induced necrosis of the bone . in addition , biocompatible shape memory polymers can be designed with recoverable strain that is orders of magnitude higher than shape memory alloys . furthermore , prostheses can be manufactured in a single size and easily trimmed or otherwise modified by the surgeon during the implantation procedure to tailor the prosthesis in size and / or shape for the particular anatomy . such modification does not negatively effect the ability of the prostheses to engage the ossicle .

the invention provides , inter alia , multilayer films of alternating layers of a glycosylated polymer and a lectin , as well as methods of making and using these films . the films can be adapted for , inter alia , delivery of a biologically active agent providing a non - toxic substrate to support cell growth , replication , and / or maintenance as well as detecting a microorganism and / or reducing microorganism adherence to a surface .

a method and apparatus for the stabilizing of napthopyran and spiroxazine photochromic dye in a coating or plastic media is presented . as prolonged exposure to light causes degradation of the photochromic properties of the dyes , a two - tiered layering system is utilized in which a hindered amine stabilizer and / or an ultraviolet light absorber , is placed as a clear coat layer above a bottom layer containing the photochromic dyes . the bottom layer is constructed containing the photochromic dyes by either a coating of a surface of a lens or an imbuing of the photochromic dyes into the lens material , and can further optionally contain a hals and / or uv blocking compound itself .

a plastic propeller for marine electric trolling motors modified to prevent the entanglement and build - up of weeds by the application to its surface of a thin sheet of metal formed in the shape and size of the blade and extending beyond the blade &# 39 ; s leading edge .

the invention provides for preparing a polymer - active agent conjugate , the method comprising the steps of reacting an amino acid derivative with a biologically active agent under conditions to form a polymer - active agent conjugate .

an antimicrobial therapeutic hydrogel composition comprises a pharmaceutical and / or medical grade silver salt , and an aloe vera gel or extract . the composition could also include stabilizing agents , a non - ionic surfactant , polyol , and hydrophilic hygroscopic polymers . the resulting product has potent antimicrobial activity against bacteria , protozoa , fungi and viruses . the antimicrobial therapeutic composition can serve as a treatment for burns and as a wound / lesion dressing that either donates or receives moisture to provide a physiologic environment for accelerated wound healing and the relief of pain .

a biosurface structure array comprising a plurality of tester areas whereby each area has a surface topology whose features are defined on a micro - or nanometer scale . the bbsa of the invention may further comprise adsorbed compounds to one or more of the tester fields , e . g . active biological compounds or polymers .

this invention relates to a method for preparing a drug - eluting stent using a chemical vapor deposition , the method comprising modifying the surface of a biodegradable polymer with nanostructures through a plasma - assisted chemical vapor deposition so as to improve drug - loading capability and drug elution rate .

a conventional exterior rear - view mirror is broken into vertical segments and collapsed into a stack in a plane roughly orthogonal to its original plane , so the frontal area is drastically reduced , thereby reducing drag and increasing fuel mileage . the total projected width of the vehicle is also reduced . in one embodiment of the invention , the exterior rear - view mirror is formed as part of a side window , thereby completely eliminating projections to achieve advanced streamlining , and also potentially decreasing manufacturing costs . in another embodiment , a rear view is provided from a sun roof . when formed as part of the canopy of an aircraft , a rear view is provided without significant weight or complexity . another embodiment of the invention lies in a sheet of flexible adhesive - backed plastic which may be affixed to a window . in the context of a truck , the exterior rear - view mirror does not project significantly beyond the innermost edge of an equivalent conventional rear - view mirror , thereby reducing both drag and excess lateral dimension .

absorbable polyester fibers , braids , and surgical meshes with prolonged strength retention have been developed . these devices are preferably derived from biocompatible copolymers or nomopolymers of 4 - hydroxybutyrate . these devices provide a wider range of in vivo strength retention properties than are currently available , and could offer additional benefits such as anti - adhesion properties , reduced risks of infection or other post - operative problems resulting from absorption and eventual elimination of the device , and competitive cost . the devices may also be particularly suitable for use in pediatric populations where their absorption should not hinder growth , and provide in all patient populations wound healing with long - term mechanical stability . the devices may additionally he combined with autologous , allogenic and / or xenogenic tissues to provide implants with improved mechanical , biological and handling properties .

a packaging system and method is provided which will substantially retard or reduce the caking of powdered , crystalline , or granular organic and inorganic cakable chemical compounds and mixtures thereof . such retardation and reduction in caking enhances the free flowability and scoopability of the compound . the packaging system and method comprises a moisture impermeable container which may include a moisture impermeable cover which closes the container , providing a moisture tight seal to close the container , and desiccant . the compound can be placed directly into the container or into a moisture permeable bag which is sealed after the compound has been placed therein . the bag is filled or sized so that there will be a void space in the container once the container is closed . the desiccant is placed in the void space . the drum may be a fiber board drum having a moisture impermeable liner , such as an aluminum liner . the cover is preferably a plastic cover . the permeable bag is preferably made of kraft crepe paper or woven polypropylene .

a method of molding reinforced polymer compositions using a molding machine with a tapered bore is provided . the method has particular application in molding polymer that is reinforced with particles having an aspect ratio that is greater than 1 : 1 . the plunger machine used in the method includes a barrel housing with a smooth walled barrel with longitudinal fins projecting inwardly towards the center of the bore that defines a main melt chamber . a plunger housing , having a plunger bore , defines an initial melt chamber and is in communication with the main melt chamber . a plunger resides in the plunger bore and is reciprocatable therein . the barrel bore is continuously inwardly tapered and cooperates with the longitudinal fins to provide a shortened melt period and a smooth transition and alignment of reinforcing members within the polymer mixture during the melt process . the method of using a machine with a smooth bore and cooperating fins ensure substantial alignment of the reinforcement members with the longitudinal axis of the bore in the direction of the composition flow to avoid excessive breakage of the reinforcing particles and prepare the polymer mixture for extrusion into a mold assembly .

three dimensional objects are formed by scanning a liquid thermosensitive resin with a laser beam causing imagewise heating of the resin . because thermosensitive compositions do not obey the law of linear superposition , the problem of stray exposure is eliminated allowing the thermal polymerization of any point within the volume of the liquid without affecting adjacent points .

in order to reduce the cost of weather seal having a core or carrier which acts as an embedded support for the rubber - like sealing material , the carrier is first contained within a substrate of low - cost rubber material , which may be applied to the core by extrusion of a substrate of recycled , reground rubber , preferably epdm rubber which may include a thermoplastic olefinic material as a binder . this substrate is cohesive with an overlaying covering of uncured elastomeric material , which may be extruded over the substrate - encased carrier . the carrier , which may be sold separately or encased in the substrate , is provided to enable to the weather seal to be compressed or bent . reinforcement elements are attached to the wire loops of the carrier , without knitting to the wire loops . the loops of the wire carrier are guided into and held in grooves in a wheel . feed screws tangential to the wheel compress the loops . the compressed loops are brought to a process station where the reinforcement elements are applied and attached . the use of recycled cured material in a substrate and the replacement of yarn attached to a wire carrier by knitting , with overlaying reinforcement elements provides cost savings over conventional weather seal which is significant since such weather seal is used in large quantities in the automotive industry .

method and apparatus for forming an article from a molten plasticized resin using an injection molding machine by forming a mold cavity having a first region for producing a molded part and a second , distinctive region for receiving a plasticised resin ; injecting into the second region a volume of plasticized resin for the article to be formed in the first region of the mold cavity ; applying pressure to plasticized resin to move it at least in part from the second region to the first region ; and maintaining pressure on the plasticised resin in the first region until the article is formed and stresses are relieved .

the invention is based on the discovery that the sequence of monomers in a polymeric biomolecule can be determined in a self - contained , high pressure reaction and detection apparatus , without the need for fluid flow into or out from the apparatus . the pressure is used to control the activity of enzymes that digest the polymeric biomolecule to yield the individual monomers in the sequence in which they existed in the polymer . high pressures modulate enzyme kinetics by reversibly inhibiting those enzymatic processes which result in a higher average activation volume , when compared to the ground state , and reversibly accelerating those processes which have lower activation volumes than the ground state . modulating the pressure allows the experimenter to precisely control the activity of the enzyme . conditions can be found , for example , where the enzyme removes only one monomer from the biomolecule before the pressure is again raised to a prohibitive level . the identity of the single released nucleotide or amino acid can be determined using a detector that is in communication with a probe in the detection zone within the reaction vessel .

improved contact lens compositions are achieved through incorporation of a fluorine containing mono or diester of itaconic acid in siloxane polymeric contact lens compositions . copolymers include components which modify contact lens mechanical , optical and transport properties as well as surface characteristics to achieve at least some compositions having an oxygen permeability of at least dk35 with a refractive index of from 1 . 35 to 1 . 5 and a percent hydration below 2 percent of total weight . contact lenses made of materials of this invention are highly permeable to oxygen and resistant to the deposition of tear components providing extended wear capability through improved biocompatibility .

a pallet comprising means to secure a tarp or plastic covering is designed to minimize the amount of plastic wrap or tarp required and to be simply employed . the securement means of the present invention are at least partially integrated with the pallet and do not interfere with the other operative loading features of the tray or pallet . in general , the means to secure comprise an opening integral to a side or end of the pallet , opening to the bottom edge , and shaped to both accept and secure a portion of the covering .

a method of treatment of vesicoureteral reflux , incontinence and other defects is described wherein chondrocytes are mixed with a liquid biodegradable polymeric material to form a suspension . the suspension is injected into the area where the defect is located and can be corrected by the presence of a bulking agent , in an amount effective to yield cartilage .

the formation of tubular objects by spirally winding and seaming a relatively rigid strip of plastics material . a sealing flap along one longitudinal edge of the strip , and an engaging surface along the other edge positioned close to but separate from the interlocking portions of these longitudinal edges . the provision of these sealing flaps and engaging surfaces permit the interlocking portions at the edges to be designed independent of the ability of these interlocking portions to create a fluid seal . this results in optimum operation of these interlocking portions to , for example , permit relatively rapid changes in the diameter of the tube as it is formed , as well as subsequent to its formation .

a process for making printing plate material suitable for imaging by laser radiation . a metal substrate is electrocoated in a bath containing a polymeric resin and laser - sensitive particles , thereby depositing a laser ablatable layer on a principal surface of the metal substrate . in one embodiment , the laser - ablatable layer is treated with a corona discharge for a time sufficient to render the layer non - ink wettable . in other preferred embodiments , the laser - ablatable layer is overcoated with an overlayer such as a non - ink wettable silicone layer or a water - wettable layer comprising an organophosphorus polymer , preferably a copolymer of acrylic acid and vinylphosphonic acid .

a composite film material usable in a data carrier card body includes a first outer plastic layer , an inner plastic layer and a second outer plastic layer , all the layers together forming a co - extruded composite . the plastic material of the first outer layer is a polyethylene terephthalate glycol copolymer or contains a petg , the plastic material of the inner layer is a thermoplastic elastomer or containes a tpc , and the plastic material of the second outer layer is a petg or contains a petg .

a reusable container , made of a thermoplastic material , with at least one filler and drain opening in the top panel and with a circumferential upper and lower stacking ring . to permit reuse , direct stackability , good residual drainability as well as good manipulability of the container , this invention provides for the upper stacking ring to have a slightly larger diameter than the lower stacking ring and to feature on the inside of its upper rim a recess matching the diameter of the lower stacking ring and on the outside a vertically protruding circular flange , so that , when stacked one container atop the other , the lower stacking ring of the upper container fits into the recess in the upper stacking ring of the barrel underneath and is snugly centered therein by the vertically protruding circular flange . this allows for the direct , multiple , secure stacking of the containers that are the object of this invention .

a metering device , a shooting pot , useful in the hot runner system of an injection molding machine including a piston cylinder assembly where the piston is movable in a first direction to effect a valve action and in a second direction to advance a metered volume of thermoplastic material .

a method for the preparation of antimicrobially active materials is presented . the invention involves taking a base material such as allografts , xenografts , polymers , metals , and ceramics and combining it with an antimicrobially active agent , such as antibiotics , antibacterials , antifungals , antivirals , disinfectants , and polypeptides , after which it is irradiated with ionizing radiation to sterilize and stabilize the combined material . the resulting antimicrobially active material may then be stored at ambient temperature while maintaining its antimicrobial activity and the structural integrity of the base material . the invention is particularly useful for both preventing and treating a variety of infections and for increased safety in reconstructive procedures .

a biaxially oriented multilayered container consisting of a body portion and a mouth portion . the body portion comprises one or more layers of a thermoplastic gas - barrier resin b and layers of a thermoplastic resin a other than the resin b which are larger in number than the resin b layers by 1 , the resin a and b layers being laminated alternately , and at least the open end part of said mouth portion is composed of a single layer of the resin a . as a characteristic feature , a coarsely mixed resin layer of resins a and b in which the proportion of resin particles having a long diameter of not more than 10 μm is not more than 10 % exists in at least one of the boundaries between the resin a and b layers .

the present invention relates to a support device for breast prosthesis based on an acellular matrix material of a biological tissue . the support device for breast prosthesis is formed by tailoring a membranaceous material into a petal - shaped planar biological matrix blank and by connecting adjacent edges thereof . the support device can match with the breast prosthesis ; and provide a support , fixation and coverage for the breast prosthesis in various surgical operations such as mammoplasty and breast orthopedics , to avoid the ptosis and translocation of the breast prosthesis , thereby achieving desirable effects of plastic surgery . once being implanted , the matrix material of a biological tissue can be integrated into the surrounding breast tissue of the subject , and thus transformed into new tissues in human body without the retention of foreign bodies . the present invention further relates to a method for manufacturing a support device , and a membranaceous biological matrix material .

the extraction or purification of biomaterials and other products by liquid - liquid extraction in an aqueous system is enhanced by introducing a particulate polymeric adsorbent into the extraction system and agitating the system , whereupon the adsorbent reversibly binds the product or material to be separated from the product , to form a complex , and the complex preferentially partitions into one of the liquid phases . the complex is then separated , and the product recovered from the complex or the remaining liquid . ion exchange resins comprising beads or ground particles , of 0 . 01 - 10 micrometer average diameter , are representative adsorbents .

nanocomposite biocompatible hydrogels may be synthesised as model systems for in situ cured local drug delivery devices for treatment of inter alia periodontal infections . the composite includes the following components : nanoparticles , a matrix gel , and chlorhexidine or other antibacterial drug . the nps were obtained by free radical initiated copolymerization of the monomers , 2 - hydroxyethyl methacrylate and polyethyleneglycol dimethacrylate , in aqueous solution . the same monomers were used to prepare crosslinked matrices by photopolymerization . nchgs were obtained by mixing nps , monomers , and drug in an aqueous solution then crosslinked by photopolymerization .