Source: http://www.google.es/patents/US5834384?hl=es&dq=flatulence
Timestamp: 2013-05-25 15:37:01
Document Index: 113968251

Matched Legal Cases: ['application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08']

Patente US5834384 - Nonwoven webs with one or more surface treatments - Google PatentesB�squeda Im�genes Maps Play YouTube Noticias Gmail Drive M�s » B�squeda avanzada de patentes | Historial web | Iniciar sesi�n B�squeda avanzada de patentesPatentesA nonwoven web having improved particulate barrier properties is provided. A surface treatment having a breakdown voltage no greater than 13 KV direct current is present on the nonwoven web. The particulate barrier properties are improved by subjecting said surface treatment treated nonwoven web to corona...http://www.google.es/patents/US5834384?utm_source=gb-gplus-sharePatente US5834384 - Nonwoven webs with one or more surface treatments N�mero de publicaci�nUS5834384 ATipo de publicaci�nConcesi�n N�mero de solicitud08/563,811 Fecha de publicaci�n10 Nov 1998 Fecha de presentaci�n28 Nov 1995 Fecha de prioridad28 Nov 1995Tambi�n publicado comoCA2237062A1WO1997021364A2WO1997021364A3 InventoresJoel BrostinBernard CohenLamar Heath Gipson Cesionario originalKimberly-Clark Worldwide, Inc.Kimberly-Clark Corporation Clasificaci�n de EE.UU.442/382442/414427/538442/392442/415442/381156/272.6 Clasificaci�n internacionalD04H1/42D06M10/02D06M10/00 Clasificaci�n cooperativaD06M10/025D04H1/42D06M2101/18 Clasificaci�n europeaD06M 10/02BD04H 1/42ReferenciasCitas de patentes (103)Otras citas (33) Citada por (11)Enlaces externosUSPTO Cesi�n de USPTO EspacenetNonwoven webs with one or more surface treatmentsUS 5834384 A Resumen A nonwoven web having improved particulate barrier properties is provided. A surface treatment having a breakdown voltage no greater than 13 KV direct current is present on the nonwoven web. The particulate barrier properties are improved by subjecting said surface treatment treated nonwoven web to corona discharge.
What is claimed is: 1. A nonwoven electret comprising: at least one layer of fibers, wherein the fibers have been subjected to corona discharge and include a surface treatment having a breakdown voltage no greater than 13 KV of direct current.
5. A nonwoven electret comprising: at least two layers of spunbonded fibers and at least one layer of meltblown fibers, wherein the layer of meltblown fibers is between the two layers of spunbonded fibers, wherein fibers of at least one layer have been subjected to corona discharge; and wherein the fibers which have been subjected to corona discharge include a surface treatment having a breakdown voltage no greater than 13 KV of direct current.
10. A nonwoven electret comprising: at least two layers of spunbonded fibers and at least one layer of meltblown fibers, wherein the layer of meltblown fibers is between the two layers of spunbonded fibers, wherein the fibers forming at least one layer have been subjected to corona discharge; and wherein at least one layer of spunbonded fibers includes a surface treatment having a breakdown voltage no greater than 13 KV of direct current and wherein the layer of meltblown fibers includes a surface treatment having a breakdown voltage no greater than 13 KV of direct current.
16. A nonwoven web comprising: at least two layers of spunbonded fibers and at least one layer of meltblown fibers, wherein the layer of meltblown fibers is between the two layers of spunbonded fibers, wherein fibers of at least one layer include a surface treatment having a breakdown voltage no greater than 13 KV of direct current, and wherein fibers of at least one layer include a surface treatment having a breakdown voltage greater than 13 KV of direct current; and wherein each layer of fibers having a surface treatment has been subjected to corona discharge.
19. A nonwoven web comprising: at least one layer of fibers which has been subjected to corona discharge, wherein the fibers include a first surface treatment having a breakdown voltage no greater than 13 KV of direct current, and wherein the fibers include a second surface treatment having a breakdown voltage greater than 13 KV of direct current.
24. A nonwoven web comprising: at least two layers of spunbonded fibers and at least one layer of meltblown fibers, wherein the layer of meltblown fibers is between the two layers of spunbonded fibers, at least one layer of fibers having been subjected to corona discharge, wherein at least one layer of fibers includes a first surface treatment having a breakdown voltage no greater than 13 KV of direct current, and wherein the at least one layer of fibers include a second surface treatment having a breakdown voltage greater than 13 KV of direct current.
EXAMPLES To demonstrate the attributes of the present invention, several surface treatments were combined with nonwoven webs of various average basis weights and polymer blends as listed in TABLE I.
TABLE 1*__________________________________________________________________________SURFACETREATMENT                AMOUNTINDUSTRIAL     CHEMICAL       APPLIED TO                           TYPE OFDESIGNATION     DESCRIPTION    SURFACE                           NONWOVEN WEB__________________________________________________________________________1. Y-12488     Polyalkyleneoxide Modified                    4% and 1%                           1.5 osy M     Polydimethysiloxane     Union Carbide Corporation2. HYPERMER     Modified Polyester Surfactant                    4%     1.5 osy M   A409   98%;     Xylene 2%;     ICI America Inc.3. FC1802 C8 Fluorinated Alkyl     Alkoxylate 86-89%;     C8 Fluorinated Alkyl     Sulfonamide 9-10%;     C7 Fluorinated Alkyl                    2.4%   1.5 osy M     Alkocylate 2-4%;     C7 Fluorinated Alkyl     Sulfonamide 0.2-1%;     3M Corp.4. FX 1801     Fluorochemical Urethane                    1%**   1.6 osy S/M/S     Derivative - 100% - 3M Corp.                    (contained                    0.03% ZELEC)5. TEGOPREN     Polysiloxane Polyether                    4%     1.5 osy M   5830   Copolymer - Goldschmidt Corp.6. TRITON Octlyphenoxypoylethoxy                    2%     1.5 osy M   X102   Ethanol having 12-13 Ethylene     Oxide Groups - Rohm &amp; Haas Co.7. ZELEC  Alcohol Phosphate Salt;                    .03%***                           2.2 osy S/M/S     Neutralized Mixed Alkyl                           KIMGUARD      Phosphates - Du Pont  1.6 osy S/M/S8. FC808  Polymeric Fluoroalphatic Ester                    2.95%  1.8 osy S/M/S     3M Corp.              KLEENGUARD 9. MASIL  Silicon Surfactant                    2%     1.5 osy M   SF19   PPG10.   GEMTEX Dioctyl Sodium Sulfosuccinate                    .3%    1.5 osy M   SM33   Based Anionic Finetex Corp.__________________________________________________________________________ S/M/S Spunbonded/Meltblown/Spunbonded Nonwoven Web Laminate S Spunbonded Nonwoven Web M Meltblown Nonwoven Web *All surface treatments applied topically except as noted. **Applied to molten polymer. Bloomed to surface of M. ***Applied topically to one S layer.
A portion of each of the surface treatment treated nonwoven webs described in TABLE 1, (samples 1-10) was removed and not subjected to corona discharge. The remainder of each of the surface treatment treated nonwoven web samples (1-10) was subjected to corona discharge. The corona discharge was produced by using a Model No. P/N 25A--120volt, 50/60 Hz reversible polarity power unit (Simco Corp., Hatfield, Pa.), which was connected to the EFIS, and a Model No. P16V 120V,.25A 50/60 Hz power unit (Simco Corp., Hatfield, Pa.) which was connected to the EFRS. The EFIS was a RC-3 Charge Master charge bar (Simco. Corp.) and the EFRS was a solid, three inch diameter, aluminum roller. The corona discharge environment was generally about 71 U.S. Pat. No. 5,401,446, two sets of EFIS/EFRS are used. The voltage applied to the first set of EFIS/EFRS was 15 KV DC/0.0 KV DC, respectively. The voltage applied to the second set of EFIS/EFRS was 25 KV DC/7.5 KV DC, respectively. The gap between the EFIS and the EFRS for each set was one inch.
The filtration efficiency for both corona treated and non-corona treated nonwoven web samples was analyzed. The particulate filtration test used to evaluate the particulate filtration properties of these nonwovens is generally known as the NaCl Filter Efficiency Test (hereinafter the "NaCl Test"). The NaCl Test was conducted on an automated filter tester, Certitest� Model #8110, which is available from TSI Inc., St. Paul, Minn. The particulate filtration efficiency of the test fabric is reported as "% penetration". "% penetration" is calculated by the following formula--100 particles represent the total quantity of approximately 0.1 μm NaCl aerosol particles which are introduced into the tester. The downstream particles are those particles which have been introduced into the tester and which have passed through the bulk of the test fabric. Therefore, the "% penetration" value reported in TABLES I-V is a percentage of the total quantity of particles introduced into a controlled air flow within the tester which pass through the bulk of the test fabric. The size of the test fabric was 4.5" in diameter. The air flow may be constant or varied. At about 32 liters per minute of air flow, a pressure differential of between 4 and 5 mm Water Gage develops between the atmosphere on the upstream side of the test fabric as compared to the atmosphere on the down stream side of the test fabric. The filtration efficiency results for samples 1-6 and 8-10 are reported in TABLE 2. The filtration efficiency results for sample 7, the ZELEC surface treatment treated nonwovens webs, are not reported in TABLE 2.
FIELD OF THE INVENTION The present invention relates to fabrics useful for forming protective garments. More particularly, the present invention relates to nonwoven webs and surface coatings for such nonwoven webs.
BACKGROUND OF THE INVENTION There are many types of limited use or disposable protective garments designed to provide barrier properties. Protective garments should be resistant to penetration by both liquids and/or particles. For a variety of reasons, it is undesirable for liquids and pathogens which may be carried by liquids to pass through the garment to contact persons working in an environment where pathogens are present.
SUMMARY OF THE INVENTION The present invention provides a nonwoven web having improved particulate barrier properties. In one embodiment, the nonwoven web may include at least one layer formed from fibers subjected to corona discharge. The fibers subjected to corona discharge may include a surface treatment having a breakdown voltage no greater than 13 thousand volts (KV) of direct current (DC) and desirably a breakdown voltage no greater than 8 KV DC and more desirably a breakdown voltage no greater than 5 KV DC and most desirably a breakdown voltage of between 1 KV DC and 5 KV DC. The nonwoven web may also include fibers formed from a blend of polypropylene and polybutylene. Desirably, the polybutylene is present in the blend in a range from 0.5 to 20 percent weight of the blend. Another surface treatment having a breakdown voltage greater than 13 KV DC may be present on the fibers subjected to corona discharge or on fibers not subjected to corona discharge or both.
DETAILED DESCRIPTION OF THE INVENTION As used herein, the term "dielectric" means, according to McGraw-Hill Encyclopedia of Science & Technology, 7th Edition, Copyright 1992, a material, such as a polymer, which is an electrical insulator or which an electric field can be sustained with a minimum dissipation of power. A solid material is a dielectric if its valence band is full and is separated from the conduction band by at least 3 eV.
As used herein, the term "surface treatment" means a material, for example a surfactant, which is present on the surface of another material, for example a shaped polymer such as a nonwoven. The surface treatment may be topically applied to the shaped polymer or may be added to a molten or semi-molten polymer. Methods of topical application include, for example, spraying, dipping or otherwise coating the shaped polymer with the surface treatment. Surface treatments which are added to a molten or semi-molten polymer may be referred to as "internal additives". Internal additives suitable for use in the present invention are generally non-toxic and have a low volatility. Desirably, these internal additives should be thermally stable at temperatures up to 300 the molten or semi-molten polymer and should also sufficiently phase separate such that the additive migrates from the bulk of the shaped polymer towards a surface thereof as the shaped polymer cools.
The exact calender temperature and pressure for bonding the nonwoven web laminate depend on the thermoplastic(s) from which the nonwoven web is made. Generally for nonwoven web laminates formed from polyolefins, desirable temperatures are between 150 (66 pounds per linear inch. More particularly, for polypropylene, the desirable temperatures are between 270 (132 pounds per linear inch.
Of particular usefulness is the antistat or antistatic material known as ZELEC The nonwoven web may be treated with the antistatic material either before or after subjecting the web to charging. Furthermore, some or all of the material layers may be treated with the antistatic material. In those instances where only some of the material layers are treated with antistatic material, the non-treated layer or layers may be subjected to charging prior to or after combining with the antistatic treated layer or layers.
Of particular usefulness are the alcohol repellent materials formed from fluorinated urethane derivatives, an example of which includes FX-1801. FX-1801, formerly called L-10307, is available from the 3M Company of St. Paul, Minn. FX-1801 has a melting point of about 130 138 meltblown layer at an amount of about 0.1 to about 2.0 weight percent or more particularly between about 0.25 and 1.0 weight percent. FX-1801 may be topically applied or may be internally applied by adding the FX-1801 to the fiber forming polymer prior to fiber formation.
Generally, internal additives, such as the alcohol repellent additive FX-1801, suitable for use in the present invention should be non-toxic and have a low volatility. Additionally, the internal additive should be thermally stable at temperatures up to 300 soluble in the molten or semi-molten fiber forming polymer. The internal additive should also sufficiently phase separate such that the additive migrates from the bulk of the polymer fiber towards the surface of the polymer fiber as the fiber cools without requiring the addition of heat. The layers of the fabric of the present invention may also contain fire retardants for increased resistance to fire, pigments to give each layer the same or distinct colors, and/or chemicals such as hindered amines to provide enhanced ultraviolet light resistance. Fire retardants and pigments for spunbonded and meltblown thermoplastic polymers are known in the art and may be internal additives. A pigment, if used, is generally present in an amount less than 5 weight percent of the layer.
Citas de patentes Patente citada Fecha de presentaci�n Fecha de publicaci�n Solicitante T�tuloUS66879116 Mar 189926 Feb 1901Lucien I. BlakeProcess of electrical separation of conductors from non-conductors.US81306318 Abr 190320 Feb 1906Henry M. SuttonProcess of separating substances of different dielectric capacities.US85999820 Dic 190616 Jul 1907Huff Electrostatic Separator CompanyMethod of electrical separation.US92403217 Mar 19068 Jun 1909Blake Mining & Milling CompanyElectrostatic separating process.US122230527 Oct 191410 Abr 1917Jakob KrausElectrostatic separator for inflammable materials.US12971597 Feb 191811 Mar 1919Research CorporationElectric separator.US13554774 Nov 191812 Oct 1920United Chemical & Organic Products Co.Means for separating mixturesUS21068651 Mar 19351 Feb 1938American Lurgi CorporationMethod and apparatus for electrostatic separationUS22174446 Abr 19388 Oct 1940Westinghouse Electric & Manufacturing CompanyMethod of and means for the manufacture of abrasive clothUS232857712 Ene 19407 Sep 1943Behr-Manning CorporationProcess and apparatus for grading and for coating with comminuted materialUS237806728 Sep 194212 Jun 1945Petroleum Conversion CorporationProcess of cracking petroleumUS239879222 Oct 194323 Abr 1946Ritter Products CorporationElectrostatic sizing of materialsUS27480185 Jun 195329 May 1956Ransburg Electro-Coating Corp.Apparatus and method of electrostatic powderingUS29980514 Abr 195829 Ago 1961Walsco CompanyMethod and apparatus for forming fibrous articlesUS30126688 Dic 195912 Dic 1961Foster FraasElectrostatic separator carrier electrodeUS305977228 Sep 196023 Oct 1962International Minerals & Chemical CorporationElectrostatic separation in non-uniform fieldUS312554717 Mar 1964 T�tulo no disponibleUS328134713 Jul 196225 Oct 1966International Paper CompanyMethod and apparatus for treating plastic coated paperUS332393321 Jun 19636 Jun 1967Societe Anonyme De Machines ElectrostatiquesElectrostatic powder applicationUS333899221 Dic 196529 Ago 1967E. I. Du Pont De Nemours And CompanyProcess for forming non-woven filamentary structures from fiber-forming synthetic organic polymersUS334100712 Jun 196412 Sep 1967Lafranca Jr Joseph JFiber fractionating apparatus and processUS334139421 Dic 196612 Sep 1967E.I. Du Pont De Nemours And CompanySheets of randomly distributed continuous filamentsUS33805844 Jun 196530 Abr 1968Atomic Energy Commission UsaParticle separatorUS340281425 Jun 196424 Sep 1968Sames, Societe Anonyme De Machines ElectrostatiquesMethod and apparatus for the electrostatic sorting of granular materialsUS34367978 Mar 19658 Abr 1969E.I. Du Pont De Nemours & Co.Method and apparatus for charging and combining continuous filaments of different polymeric composition to form a nonwoven webUS350276327 Ene 196424 Mar 1970Carl Freudenberg Kg. Auf AktienProcess of producing non-woven fabric fleeceUS354261516 Jun 196724 Nov 1970Monsanto Co.Process for producing a nylon non-woven fabricUS35818867 Jul 19691 Jun 1971Wintershall Ag.Two-stage electrostatic separation of particulate materialUS369260628 Mar 196919 Sep 1972Ransburg Electro-Coating Corp.Method of electrostatically depositing particles onto the trailing edge of a substrateUS36926189 Oct 196919 Sep 1972Metallgesellschaft Ag.Continuous filament nonwoven webUS380281729 Sep 19729 Abr 1974Asahi Kasei Kogyo Kk,JaApparatus for producing non-woven fleecesUS382102129 Feb 197228 Jun 1974Ei Du Pont De Nemours And Co,UsAntistatically protected nonwoven polyolefin sheetUS384924122 Feb 197219 Nov 1974Exxon Res And Eng Co,UsNon-woven mats by melt blowingUS38550461 Sep 197117 Dic 1974Kimberly Clark Corp,UsPattern bonded continuous filament webUS385933015 Mar 19727 Ene 1975E. I. Du Pont De Nemours And CompanyUltraviolet absorbing coating compositionsUS389680219 Abr 197429 Jul 1975American Cyanamid CompanyFlexible flocked dressingUS390760417 Oct 197223 Sep 1975Exxon Research And Engineering CompanyNonwoven mat battery separatorsUS390900928 Ene 197430 Sep 1975The Astatic CorporationTone arm and phonograph pickup assembliesUS39623862 Ene 19738 Jun 1976Sun Research And Development Co.Corona discharge treatment of foam fibrillated websUS397952916 Ene 19757 Sep 1976Usm CorporationElectrostatic application of thermoplastic adhesiveUS399891625 Mar 197521 Dic 1976N.V. VertoMethod for the manufacture of an electret fibrous filterUS401106711 Sep 19758 Mar 1977Minnesota Mining And Manufacturing CompanyFilter medium layered between supporting layersUS401381620 Nov 197522 Mar 1977Draper Products, Inc.Stretchable spun-bonded polyolefin webUS403516429 Nov 197412 Jul 1977Minnesota Mining And Manufacturing CompanyMethods for removing charged and non-charged particles from a fluid by employing a pyrollectric filterUS40412034 Oct 19769 Ago 1977Kimberly-Clark CorporationNonwoven thermoplastic fabricUS405872427 Jun 197515 Nov 1977Minnesota Mining And Manufacturing CompanyIon Scattering spectrometer with two analyzers preferably in tandemUS407021819 Abr 197624 Ene 1978Kimberly-Clark CorporationMethod of producing a soft, nonwoven webUS409114010 May 197623 May 1978Johnson & JohnsonContinuous filament nonwoven fabric and method of manufacturing the sameUS409628914 Dic 197620 Jun 1978Hoechst AktiengesellschaftElectrostatic deposition of swellable, modified cellulose ether on water wet hydrophilic substrateUS410306214 Jun 197625 Jul 1978Johnson & JohnsonAbsorbent panel having densified portion with hydrocolloid material fixed thereinUS414060722 Nov 197620 Feb 1979Forchungsinstitut Fur TextiltechnologieMethod for modifying the surface of polymeric substrate materials by means of electron bombardment in a low pressure gas dischargeUS417030419 May 19789 Oct 1979British Cellophane LimitedWrapping filmUS417815721 Dic 197711 Dic 1979N. V. VertoMethod for manufacturing a filter of electrically charged electret fiber material and electret filters obtained according to said methodUS418597228 Mar 197829 Ene 1980Nitta Belt Kabushiki KaishaElectric charge holding structure for electretized air-filter mediumUS419624516 Jun 19781 Abr 1980Buckeye Cellulos CorporationComposite nonwoven fabric comprising adjacent microfine fibers in layersUS420836631 Oct 197817 Jun 1980E. I. Du Pont De Nemours And CompanyProcess for preparing a nonwoven webUS420956321 Jun 197824 Jun 1980The Procter & Gamble CompanyMethod for making random laid bonded continuous filament clothUS42156826 Feb 19785 Ago 1980Minnesota Mining And Manufacturing CompanyMelt-blown fibrous electretsUS422367711 May 197923 Sep 1980Scott Paper CompanyAbsorbent fibrous structure and disposable diaper including sameUS427363529 May 197916 Jun 1981Institut Textile De FranceProcess and apparatus for the treatment of fibrous websUS429844025 Ene 19803 Nov 1981British Cellophane LimitedMethod and apparatus for the corona discharge treatment of webs, and webs treated therewithUS430579724 Nov 198015 Dic 1981Carpco, Inc.Material separation by dielectrophoresisUS430714321 Jul 198022 Dic 1981Kimberly-Clark CorporationMicrofiber oil and water pipeUS430822324 Mar 198029 Dic 1981Albany International Corp.Method for producing electret fibers for enhancement of submicron aerosol filtrationUS43104786 Jul 197912 Ene 1982Jacob Holm Varde A/SReinforcing fibers and method of producing same corona treatment of thermoplastic fibersUS432337419 Oct 19796 Abr 1982Nitta Belting Co., Ltd.Air filter assemblyUS432419820 Ago 198013 Abr 1982Weitman And Konrad Gmbh & Co. KgDevice for the electrostatic application of material particles entrained in a stream of gas to an advancing, flat substrateUS43405635 May 198020 Jul 1982Kimberly-Clark CorporationMethod for forming nonwoven websUS43428124 Dic 19803 Ago 1982Imperial Chemical Industries LimitedStentered, bonded, heat-set, non-woven fabric and process for producing sameUS43537991 May 197812 Oct 1982Baxter Travenol Laboratories, Inc.Hydrophobic diffusion membranes for blood having wettable surfacesUS435723418 May 19812 Nov 1982Canadian Patents & Development LimitedAlternating potential electrostatic separator of particles with different physical propertiesUS43636826 Abr 198114 Dic 1982SeplastProcess for the superficial treatment of a fibrous filtering layer, which is non-woven and highly aerated, forming electretUS436372327 Abr 198114 Dic 1982Carpco, Inc.Multifield electrostatic separatorUS437322421 Abr 198115 Feb 1983Duskinfranchise Kabushiki KaishaMethod for manufacturing a duster and the duster manufactured therefromUS437472727 May 198122 Feb 1983Fuji Electric Co., Ltd.Electrostatic sorting apparatusUS437488825 Sep 198122 Feb 1983Kimberly-Clark CorporationNonwoven laminate for recreation fabricUS437571812 Mar 19818 Mar 1983Surgikos, Inc.Method of making fibrous electretsUS439287615 Sep 198112 Jul 1983Firma Carl FreudenbergFilter packingUS439423514 Jul 198019 Jul 1983Rj Archer Inc.Heat-sealable polypropylene blends and methods for their preparationUS441179526 Feb 198125 Oct 1983Baxter Travenol Laboratories, Inc.Particle adsorptionUS443027722 May 19787 Feb 1984The Goodyear Tire & Rubber CompanyMethod for producing large diameter spun filamentsUS444351324 Feb 198217 Abr 1984Kimberly-Clark CorporationSoft thermoplastic fiber webs and method of makingUS444351527 Ene 198317 Abr 1984Peter RosenwaldAntistatic fabrics incorporating specialty textile fibers having high moisture regain and articles produced therefromUS44515897 Mar 198329 May 1984Kimberly-Clark CorporationMethod of improving processability of polymers and resulting polymer compositionsUS44551955 Ene 198219 Jun 1984James River CorporationFibrous filter media and process for producing sameUS445523714 Oct 198219 Jun 1984James River CorporationHigh bulk pulp, filter media utilizing such pulp, related processesUS44566489 Sep 198326 Jun 1984Minnesota Mining And Manufacturing CompanyParticulate-modified electret fibersUS449263327 Abr 19838 Ene 1985Ukrainsky Ordena Druzhby Narodov Institut Inzhenerov Vodnogo KhozyaistvaSeparator for separating fluid media from minute particles of impuritiesUS450753928 Dic 198226 Mar 1985Sando Iron Works Co., Ltd.Method for continuous treatment of a cloth with the use of low-temperature plasma and an apparatus thereforUS451304926 Abr 198323 Abr 1985Mitsui Petrochemical Industries, Ltd.Electret articleUS451428915 Nov 198330 Abr 1985Blue Circle Industries PlcMethod and apparatus for separating particulate materialsUS45171433 Oct 198314 May 1985Polaroid CorporationMethod and apparatus for uniformly charging a moving webUS453491827 Oct 198313 Ago 1985E. I. Du Pont De Nemours And CompanyMethod and apparatus for the electrostatic pinning of polymeric websUS454742011 Oct 198315 Oct 1985Minnesota Mining And Manufacturing CompanyBicomponent fibers and webs made therefromUS455137811 Jul 19845 Nov 1985Minnesota Mining And Manufacturing CompanyNonwoven thermal insulating stretch fabric and method for producing sameUS455420710 Dic 198419 Nov 1985E. I. Du Pont De Nemours And CompanyStretched-and-bonded polyethylene plexifilamentary nonwoven sheetUS455581113 Jun 19843 Dic 1985ChicopeeExtensible microfine fiber laminateUSRE3078231 Jul 197827 Oct 1981Minnesota Mining And Manufacturing CompanyMethod for the manufacture of an electret fibrous filterUSRE312857 Dic 198121 Jun 1983Minnesota Mining And Manufacturing CompanyMethod for manufacturing a filter of electrically charged electret fiber material and electret filters obtained according to said methodUSRE321711 Ago 19833 Jun 1986Minnesota Mining And Manufacturing CompanyMethod for the manufacture of an electret fibrous filterJP57105217A T�tulo no disponibleJP60209220A T�tulo no disponibleJP62102809A T�tulo no disponibleOtras citasReferencia1 Bonding Process , IBM Technical Disclosure Bulletin, vol. 14, No. 12, May 1972.2"Bonding Process", IBM Technical Disclosure Bulletin, vol. 14, No. 12, May 1972.3An Introduction to Electrostatic Separation, Technical Bulletin, Bulletin 8570, Carpco, Inc.4Database WPI, Section Ch, Week 8428, Derwent Publications Ltd., London, GB; Class A87, AN 84 173431, XP002008760, & JP,A,59 094 621 (Unitika KK), 31 May 1984, see abstract.5Database WPI, Section Ch, Week 8428, Derwent Publications Ltd., London, GB; Class A87, AN 84-173431, XP002008760, & JP,A,59 094 621 (Unitika KK), 31 May 1984, see abstract.6Database WPI, Section Ch, Week 8930, Derwent Publications, Ltd., London, GB; Class A94,AN 89 217687 XP002005648 & JP,A,01 156 578 (Showa Denko), 20 Jun. 1989, See Abstract.7Database WPI, Section Ch, Week 8930, Derwent Publications, Ltd., London, GB; Class A94,AN 89-217687 XP002005648 & JP,A,01 156 578 (Showa Denko), 20 Jun. 1989, See Abstract.8Electrostatic Separation of Mixed Granular Solids by Oliver C. Ralston, Elsevier Publishing Company, 1961, Chapter IV, "Applications of Electrostatic Separation", pp. 134-234.9Electrostatic Separation of Mixed Granular Solids by Oliver C. Ralston, Elsevier Publishing Company, 1961, Chapter IV, Applications of Electrostatic Separation , pp. 134 234.10G.M. Sessler: Electronic Properties of Polymers, Chapter 3 "Charge Storage", pp. 59-107.11G.M. Sessler: Electronic Properties of Polymers, Chapter 3 Charge Storage , pp. 59 107.12J. van Turnhout: Thermally Stimulated Discharge of Polymer Electrets, Chapter 1, pp. 1 24 (1975).13J. van Turnhout: Thermally Stimulated Discharge of Polymer Electrets, Chapter 1, pp. 1-24 (1975).14J. van Turnhout: Topics in Applied Physics, vol. 33, Chapter 3 "Thermally Stimulated Discharge of Electrets", pp. 81-215 (1980).15J. van Turnhout: Topics in Applied Physics, vol. 33, Chapter 3 Thermally Stimulated Discharge of Electrets , pp. 81 215 (1980).16Journal of Electrostatics, vol. 21, 1988, Amsterdam NL, pp. 81 98, XP002012022, P. A. Smith & G. C. East: Generation of Triboelectric Charge in Textile Fibre Mistures, and their use as Air Filters , see document.17Journal of Electrostatics, vol. 21, 1988, Amsterdam NL, pp. 81-98, XP002012022, P. A. Smith & G. C. East: "Generation of Triboelectric Charge in Textile Fibre Mistures, and their use as Air Filters", see document.18Patent Abstracts of Japan, vol. 10, No. 71 (C 334), 20 Mar. 1986 & JP,A,60 209220 (Kouken K.K.), 21 Oct. 1985, see abstract.19Patent Abstracts of Japan, vol. 10, No. 71 (C-334), 20 Mar. 1986 & JP,A,60 209220 (Kouken K.K.), 21 Oct. 1985, see abstract.20Patent Abstracts of Japan, vol. 11, No. 315 (C 451), 14 Oct. 1987 & JP,A,62 102809 (Mitsui Petrochem. Ind. Ltd.), 13 May 1987, see abstract & Database WPI, Section CH, Week 8725, Derwent Publications Ltd., London, GB; Class A12, AN 87 172842 & JP,A,62 102 809 (Mitsui Petrochem. Ind. Co. Ltd.), 13 May 1987, see abstract).21Patent Abstracts of Japan, vol. 11, No. 315 (C-451), 14 Oct. 1987 & JP,A,62 102809 (Mitsui Petrochem. Ind. Ltd.), 13 May 1987, see abstract & Database WPI, Section CH, Week 8725, Derwent Publications Ltd., London, GB; Class A12, AN 87-172842 & JP,A,62 102 809 (Mitsui Petrochem. Ind. Co. Ltd.), 13 May 1987, see abstract).22Patent Abstracts of Japan, vol. 6, No 191 (C 127), 30 Sep. 1982 & JP,A,57 105217 (Nitta K.K.), 30 Jun. 1982, see abstract & Chemical Abstracts, vol. 97, No. 26, 27 Dec. 1982, Columbus, Ohio, US; abstract No. 218901, Fibrous Filtering Material , see abstract.23Patent Abstracts of Japan, vol. 6, No 191 (C-127), 30 Sep. 1982 & JP,A,57 105217 (Nitta K.K.), 30 Jun. 1982, see abstract & Chemical Abstracts, vol. 97, No. 26, 27 Dec. 1982, Columbus, Ohio, US; abstract No. 218901, "Fibrous Filtering Material", see abstract.24U.S. application No. 08/198,298, Feb. 22, 1994, Improved Nonwoven Barrier And Method Of Making The Same.25U.S. application No. 08/266,293, Jul. 27, 1994, Improved Nonwoven Barrier And Method Of Making The Same.26U.S. application No. 08/351,966, Dec. 08, 1994, Method Of Forming A Particle Size Gradient In An Absorbent Article.27U.S. application No. 08/366,850, Dec. 30, 1994, Improved Nonwoven Laminate Barrier Material.28U.S. application No. 08/405,485, Mar. 16, 1995, Nonwoven Laminate Barrier Material.29U.S. application No. 08/450,043, May 25, 1995, Filter Matrix.30U.S. application No. 08/504,209, Jul. 19, 1994, Nonwoven Barrier And Method Of Making The Same.31U.S. application No. 08/690,587, Jul. 31, 1996, Improved Nonwoven Barrier.32USSN 08/242,948 filed May 16, 1994 entitled "Nonwoven Absorbent Polymeric Fabric Exhibition Improvement Fluid Management And Methods For Making The Same".33USSN 08/242,948 filed May 16, 1994 entitled Nonwoven Absorbent Polymeric Fabric Exhibition Improvement Fluid Management And Methods For Making The Same . Citada por Patente citante Fecha de presentaci�n Fecha de publicaci�n Solicitante T�tuloUS630998719 Abr 199930 Oct 2001Bba Nonwovens Simpsonville, Inc.Nonwoven fabric having both UV stability and flame retardancyUS64066578 Oct 199918 Jun 20023M Innovative Properties CompanyMethod and apparatus for making a fibrous electret web using a wetting liquid and an aqueous polar liquidUS651318428 Jun 20004 Feb 2003S. C. Johnson & Son, Inc.Particle entrapment systemUS65506395 Dic 200022 Abr 2003S.C. Johnson & Son, Inc.Triboelectric systemUS661036829 Mar 200126 Ago 2003Lederfabrik Vogl GmbhLeather and a method of dressing sameUS67096231 Nov 200123 Mar 2004Kimberly-Clark Worldwide, Inc.Process of and apparatus for making a nonwoven webUS68247184 Jun 200230 Nov 20043M Innovative Properties CompanyProcess of making a fibrous electret webUS748844120 Dic 200210 Feb 2009Kimberly-Clark Worldwide, Inc.Use of a pulsating power supply for electrostatic charging of nonwovensUS756935914 Oct 20044 Ago 2009American Sterilizer CompanyIndicator device having an active agent encapsulated in an electrospun nanofiberUS79686624 Ago 200628 Jun 2011Daikin Industries, Ltd.Repellent composition containing graft copolymer, graft copolymer and method of preparing graft copolymerWO2011122699A129 Mar 20116 Oct 2011Daikin Industries, Ltd.Graft copolymer and repellent compositionGirarImagen originalP�gina principal de Google - Sitemap - Descargas masivas de USPTO - Pol�tica de privacidad - Condiciones de servicio - Acerca de Google Patentes - Danos tu opini�nDatos proporcionados por IFI CLAIMS Patent Services©2012 Google