baber/WOPTO huggingface dataset:
Patent KR-20000009010-A (KR)
Title: Polydimethylsiloxane and polyethyleneglycol bonded medical polyurethane and preparation method thereof
Inventor: BAE YU HAN
IPC: C08G18/70
Filed: 1998-07-20
Abstract: PURPOSE: Polyurethane and method for manufacturing it by using polydimethylsiloxane and polyethyleneglycol having a good bio compatibility are provided which are useful for a medical polymer without thrombogenesis, bacterial infection and releasing of toxic substance of polymer in a biomass. CONSTITUTION: The medical polyurethane is prepared by covalent bonding of a polyurethane main chain produced by cross-linking a soft part of polydimethylsiloxane(PDMS) and 4,4'-methylenediphenyldiisocyanate and a hard part of diethylbishydroxymethylmalonate and polyethyleneglycol. Polyethyleneglycol and polydimethylsiloxane have a molecular weight of 300-10,000. For an example, a solution of tetrahydrofuran and dimethylacetamide in a volume ratio of 3:1 containing 0.2 w/v% of stenous oxoate and 4,4'-methylenediisocyanate is reacted with dimethylsiloxane at 60°C for 2 hr under atmospheric pressure, precipitated twice, and vacuum dehydrated at 50°C for two days under vacuum pressure to give various compositions of polyurethane(PUE series), which have an average molecular weight of 38,082 and 36,145 and PDMS fraction(%) of 76.71 and 67.93.
Patent KR-20000013223-A (KR)
Title: Initial cooling device for vehicle
Inventor: JUNG SANG GWUN
IPC: B60H1/32
Filed: 1998-08-06
Abstract: PURPOSE: An initial cooling device for a vehicle is provided to have excellent cooling effect when starting the cooling device of a vehicle in summer by storing supercritical carbon dioxide using solar heat. CONSTITUTION: The cooling device comprises:electricity supplying sources(104,105) supplying power to a starting motor(103) that drives a compressor(22); a valve(106) supplying and intercepting a coolant supplied to a condenser(33); a pressure container(107) storing the coolant; an initial expanding valve(109) expanding the coolant that is stored in the pressure container when initially starting the vehicle; and a controlling unit controlling the working of the compressor, a main expanding valve(108) and the initial expanding valve. Then, the electricity supplying sources have a filling battery(104) and a solar battery(105) to drive the starting motor using solar heat when parking the vehicle.
Patent KR-20000015272-A (KR)
Title: Automatic transmission of vehicle
Inventor: KIM YUNG IL
IPC: F16H61/02
Filed: 1998-08-28
Abstract: PURPOSE: An automatic transmission of a vehicle is provided to improve the rapid acceleration and overtaking performance. CONSTITUTION: The automatic transmission including a transmission control unit(TCU)(40) is composed of:a leg power sensor to output voltage in proportion to the strength of the leg power given to an acceleration pedal; and voltage comparing pieces(31, 32) to compare the output voltage of the leg power sensor with two standard voltages having different strength and to output a Kick Down signal to the TCU to make the TCU control the automatic transmission, and to perform Kick Down of 1st low speed change and 2nd low speed change if the output voltage is over the standard voltage.; Herein, the automatic transmission can go into the Kick Down on the basis of the output signals of the leg power sensors(10, 20, 30) to the 1st and 2nd low speed change and the rapid acceleration and the overtaking performance are improved.
Patent KR-19990029535-A (KR)
Title: 가변 지연 회로를 구비한 다층 반도체 구조의 반도체 장치
IPC: H01L23/522
Filed: 1998-09-04
Abstract: 가변 지연 회로(31)는 신호 전파 동안 지연 시간을 제공하기 위해 직렬로 접속된 복수의 지연 스테이지를 구비하고, 다층 반도체 구조의 하부 레벨에 있는 고 저항성 지연 신호 라인(31d)과 다층 반도체 구조의 상부 레벨에 있는 저 저항성 절단 가능 신호 라인(31b)은 상기 지연 스테이지의 전체 저항을 변화시키도록 각 지연 스테이지의 두개의 노드(35c/35d)들 사이에서 병렬로 접속되며; 제조자가 지연 시간을 감소시킬 경우 저 저항성 절단 가능 라인(31b)이 절단되어, 신호(S30)는 저 저항성 절단 가능 신호 라인(31b) 대신 고 저항성 신호 라인(31d)을 통하여 전파된다.
Patent KR-19980087844-A (KR)
Title: 원적외선 방사체 세라믹스
IPC: C04B33/00
Filed: 1998-09-24
Abstract: 본 발명은 원적외선 방사체 세라믹스 및 그 제조 방법에 관한 것이며, 미분쇄된 견운모 및/또는 백운모 미세분말 100 중량부에 대하여, 지르코니아 5-15 중량부, 도석 30-50 중량부, 카오린 10-30 중량부, 와목점토 10-30 중량부, 질산은 0.02-0.05 중량부, 및 분산제 0.1-0.3 중량부를 포함하는 원적외선 방사체 세라믹스 및 그 제조방법이 개시되어 있다.
Patent KR-20000026233-A (KR)
Title: Test site of module ic handler
Inventor: AN TAE SEONG
IPC: G01R31/28
Filed: 1998-10-19
Abstract: PURPOSE: A test site of module IC handler is provided to replace rapidly a socket assembly using the existing manipulator under the actual conditions of high temperature and with the vertical contact of module IC made at the same time. CONSTITUTION: A chamber maintains a proper temperature for test. A carrier control means installed on the lower plate of the chamber determines the location of a carrier containing a plurality of module ICs to be tested and transports the carrier to the external of the chamber after testing. A carrier guidance means guides the transportation of the carrier to the side of a socket assembly. A pushing means pushes the carrier to the side of the socket assembly during the test. A takeout means takes out the multiple module ICs contained in the carrier from the socket assembly after the completion of the test.
Patent KR-19990037212-A (KR)
Title: 비-셔틀식 압력 보상기를 갖는 유압 제어밸브시스템
IPC: F15B11/05
Filed: 1998-10-20
Abstract: 가변 펌프로부터 다중 유압식 작동기로 유체를 공급하기 위한 개선된 압력보상식 유체 시스템에 관한 것으로서, 분리된 밸브부는 펌프와 상이한 작동기 사이의 유체를 제어한다.  각각의 밸브부는 밸브부재와 스프링에 의해 보어내에 편향되어 있는 포핏을 구비한 압력보상 밸브를 가진다.  상기 포핏은 상기 부하로부터의 배압이 펌프 공급압력을 초과할 때 상기 작동기로부터 밸브부를 통해 펌프로의 유체 흐름을 방해하는 체크밸브로서 작용한다.  상기 부하-의존 압력과 작동기 압력 사이의 차등압력은 펌프 압력 제어 입력측에 가해진 압력을 제어하는 밸브부재의 위치를 결정한다.
Patent KR-20000027178-A (KR)
Title: Apparatus for restoring symbol timing of ofdm(orhoginal frequency division multiplexing) system
Inventor: JEONG YOUNG HAK
IPC: H04L5/06
Filed: 1998-10-27
Abstract: PURPOSE: An apparatus for restoring a symbol timing of an OFDM system is provided to correspond a position of an FFT(Fast Fourier Transform) window to an effective symbol section of an OFDM system exception a protection section. CONSTITUTION: An apparatus for restoring a symbol timing of an OFDM system includes a decimator(21), a delaying part(22), a complex conjugate(23), a complex multiple part(24), and a sliding integration part(25). The decimator is to decimate a signal quantized by an OFDM sample transmission rate with a sample spacing of a decimation degree. The delaying part delays an output of the decimation as a length of the effective symbol section. The complex conjugate is to find a complex conjugate value of a signal outputted in the delaying part. The complex multiple part is to multiply the decimator by an output signal of the complex conjugate. The sliding integration part is to accumulate and add an output of the complex multiple part each sample number extent of the protection section.
Patent KR-20000031858-A (KR)
Title: Broth and process thereof
Inventor: LEE SANG SOO
IPC: A23L23/00
Filed: 1998-11-11
Abstract: PURPOSE: A broth and a process thereof are provided which have a special flavor and ingredients, prevent food poisoning, stimulate appetite and good for health. CONSTITUTION: A broth is characterized by being made by the process of: extracting by heating the mixture mixed 25-35litter of water and 1-3kilogram of an antler, 100-300gram of a ginseng, a jujube, and ginger at 80-100°C for 2-4hrs.; mixing 20-30litter of the same extract with 200-400milliliter of a plum wine which purity is 20-30% and ripened for 60-90days; and mixing 95-99.5wt.% of the extract mixed with the plum wine and 0.1-1wt.% of fennel powder pulverized by 300-400mesh, 0.2-2wt.% of a glutinous rice jelly, 0.2-2wt.% of oligosaccharide followed by beating.
Patent KR-20000032353-A (KR)
Title: Insulation finishing material and producing method thereof
Inventor: LEE GYU WON
IPC: B32B17/04
Filed: 1998-11-13
Abstract: PURPOSE: An insulation finishing material is provided to reduce the cost and make the process simple with a simple structure and to increase quality and insulating effect without a covering phenomenon by increasing mechanical property. CONSTITUTION: For bonding a PET film(1) and a glass fiber paper(2), both contact faces or one contact face of the film and paper are covered with a water-soluble or an oil soluble adhesive and the adhesive is congealed. Then a finishing material is covered on the surface of an insulation with thermal bonding and the insulation is impregnated with the melt PET film. Finally, the finishing material is covered on the glass fiber paper.
Patent KR-19990062712-A (KR)
IPC: F27B9/02
Filed: 1998-12-02
Abstract: The common enclosure of the heat treatment installation is a cylinder (10) with a horizontal axis of which at least one end is designed to receive a module (8) in the form of an extended cylinder (10') to which are connected some supplementary cells (14'). A heat treatment installation is operated under a rarified atmosphere and incorporates several treatment cells (14, 15, 16) connected in a horizontal plane to a common airtight enclosure fitted with a handling system (18, 22) for transferring a charge (24) from one cell to another. The common enclosure is a cylinder (10) with a horizontal axis of which at least one end is designed to receive a module (8) in the form of an extended cylinder (10') to which are connected some supplementary cells (14').
Patent KR-20000038129-A (KR)
Title: Washing device for contact lens
Inventor: CHOI SUNG WOOK
IPC: A61L2/16
Filed: 1998-12-04
Abstract: PURPOSE: A washing device for a contact lens is provided to wash automatically a contact lens, to be able to wash the inside and the outside of two contact at a same time, to use a proteinic liquid remover at a minimum and a saline solution, and not to need separate keeping case. CONSTITUTION: A washing device for a contact lens comprises : a substance(10) forming many buttons(11) and including a catcher of water(12) ; an elevator shaft(20) of a cylinder type equipped on the center of a substance(10) for protruding an inflow hole(21) to the outside of a substance(10) when to press buttons(11) ; a storing sleeve (30) united by the hinge on the one side of substance(10), and including a storing tank for a proteinic liquid remover and a storing tank for a saline solution ; a supplying sleeve (40) including a supply hole and an inflow part and forming slopingly the bottom to an inflow part for gathering a proteinic liquid remover or a saline solution to an inflow part(42) ; a motor(53) equipped on an inflow part(42) inside a supplying sleeve(40) ; a rotary shaft(60) of a cylinder type connected with a motor shaft and including an inflow hole(61), an outflow hole(62), a lower gear(64) and a middle gear(63) ; an assistant shaft(70) including a gear groove(71) on the top for inserting to a lower gear(64) of a rotary shaft(60) and forming bevel gear(72) on the lower ; a lens holder(80) rotated horizontally and perpendicularly by a rotary power of a motor(53) and washing a lens(81) by supplying a proteinic liquid remover or a saline solution.
Patent KR-20000039050-A (KR)
Title: Blow fan assembly having vibroisolating structure of air conditioner
Inventor: MO YOUNG SUH
IPC: F24F1/00
Filed: 1998-12-10
Abstract: PURPOSE: A blow fan assembly having a vibroisolating structure for an air conditioner is provided to constrain generation of vibration by absorbing torque generated at an initial starting of a motor, reducing noise due to the vibration. CONSTITUTION: A blow fan assembly having a vibroisolating structure includes a cylindrical main body(420) formed with a plurality of blades at an outer periphery, first and second shafts(372,376) provided to both end parts of the cylindrical main body, a rubber boss(400) provided inside an end part of the main body and inserted by the first shaft, the rubber boss having a hollow shaft(305) to be inserted by the first shaft, a circular flange(307) integrally formed at a center portion outside the hollow shaft and a circular slot portion(310) in which the circular flange and the outside surface of the hollow shaft contact each other, and a metal plate(410) interposed between the circular main body and the rubber boss for coupling the rubber boss with the cylindrical main body.
Patent KR-19990062998-A (KR)
Title: 디스크형상의 가공물을 연마하는 방법 및 그 방법을 실행하는 장치
IPC: H01L21/304
Filed: 1998-12-11
Abstract: 본 발명은 디스크형상의 가공물, 특히 캐리어판에 고정된 반도체웨이퍼를 연마하는 방법에 관한 것이며, 이때에 캐리어판은 연마포가 팽팽히 펼쳐 있는 연마판에 대해 연마헤드에 의해 프레스되며, 그리고 연마헤드는 연마판-상부구조물에 수용되어 있다. 여기서 연마작업후에 캐리어판들은 연마헤드에 있는 리프팅장치에 의해 동시에 올려지며, 그리고 연마판-상부구조물은 캐리어판과 함께 연마길위에 있는 선형가이드에 따라 이동된다. 또한, 본 발명은 상기 방법을 실행하기에 적합한 장치에 관한 것이다.
Patent KR-20000039612-A (KR)
Title: Cover case of an irreversible device
Inventor: KIM CHANG SIK
IPC: H01P1/36
Filed: 1998-12-15
Abstract: PURPOSE: A cover case of an irreversible device is provided to facilitate the manufacturing of a cover case and reduce the manufacturing cost of the case. CONSTITUTION: A base sheet(21,31,41) having a predetermined thickness is formed by pressing at least one green sheet. A ferromagnetic body(23,34,43) is inserted into the base sheet(21,31,41). A Plurality of green sheet is stacked on the upper portion of the base sheet(21,31,41). The green sheets are punched so as to have a same magnitude and shape as the ferromagnetic body(23,34,43)
Patent KR-20000039750-A (KR)
Title: Interior material by using natural coconut fiber and manufacturing method thereof
Inventor: KIM SUNG HYUN
IPC: B32B5/18
Filed: 1998-12-15
Abstract: PURPOSE: An interior material by using natural coconut fibers and a manufacturing method thereof are provided to improve the sound-absorbing power and thermal insulation as well as the appearance of an interior material, thereby widely applying to ceiling materials and other interior materials. CONSTITUTION: A method for manufacturing an interior material by using natural coconut fibers includes the steps of forming a coconut fiber layer(1) of a thickness of 0.1-10mm by scattering 5-20weight% of coconut fibers of a thickness of 0.1-5.0cm to a polyolefin foaming agent(2) by a vibrator, injecting a water soluble adhesive 30-60weight% on the coconut fiber layer and drying the coconut fiber layer in a ventilation dryer at 50-100°C for 5-30minutes, and compressing the coconut fiber layer with a heating compression roller.
Patent KR-20000040349-A (KR)
Title: Device for adhering vinyl trademark of net bag for packaging agricultural products
Inventor: KIM DAE WHAN
IPC: B65B61/00
Filed: 1998-12-16
Abstract: PURPOSE: A device for adhering a vinyl trademark for packaging agricultural products is provided to quickly and easily heat-adhere the vinyl trademark on the surface of a net bag for package. CONSTITUTION: A net bag for package is settled on a first transmission conveyer(4) and is transmitted to a lower part of heat-adhesive plate by right and left auxiliary transmission conveyers and the first transmission conveyer. When the net bag is transmitted up to the lower part of the heat-adhesive plate(20), the vinyl trademark is transmitted by an absorption plate moving right and left along with a guide rail and is put on the upper part of the net bag. At the same time, the heat-adhesive plate is dropped by an air cylinder(18) so that the vinyl trademark is heat-adhered on the surface of the net bag by a certain heat and pressure.
Patent KR-20000041279-A (KR)
Title: Focus volume slider of a flyback transformer
Inventor: CHOI DAE SEONG
IPC: H01F38/42
Filed: 1998-12-22
Abstract: PURPOSE: A focus volume slider of a flyback transformer is provided to ensure the focus and screen voltage adjustments by contacting a slide spring with a resistance pattern for adjusting the focus and screen voltages. CONSTITUTION: A resistance pattern(130) for adjusting focus and screen voltages is formed on the upper side of a volume substrate(120) built in a focus unit(110). A support shaft(150) having a spring connection hole(140) is mounted upward the volume substrate(120). A volume shaft(190) is mounted in which a slider spring(180) is elastically mounted on the lower side of an operation knob(170) mounted in the cover(160) of the focus unit(110). One end of the slider spring(180) is in contact with a resistance pattern(130).
Patent KR-19990066865-A (KR)
Title: 이동 통신 장치용 안테나
IPC: H01Q7/00
Filed: 1998-12-23
Abstract: 이동 통신 안테나의 새로운 카테고리는 단일 층의 도전재로 구현된다.  재료면에서 슬롯들을 한정하는 와이어 탭들을 포함한 와이어 슬롯 섹션들은 안테나의 적어도 하나의 패치 탭 섹션의 주변을 부분적으로 둘러싸고 뻗어있다.  적어도 하나의 패치 탭 섹션의 주변은 각각의 슬롯의 한 엣지를 형성하고, 와이어 슬롯 섹션의 와이어 탭은 슬롯의 다른 엣지를 형성한다.  와이어 슬롯 섹션들의 와이어 탭들은 슬롯들에 의해 패치 탭 섹션으로부터 분리되고, 소정의 지점에서 패치 탭 섹션으로 병합한다.  와이어 슬롯 섹션들 각각의 길이는 변화할 수 있다.  와이어 슬롯 섹션들의 일부의 각각의 한쌍의 와이어 탭들은 입력 피드로서 기능한다.  패치 탭 섹션은 단일 탭으로 또는 슬롯에 의해 서로 분리된 복수개의 탭들로 구현될 수 있다.  패치 탭, 와이어 슬롯들 및 와이어 슬롯들의 탭들의 상대적 형상을 변화시킴으로써, 입력 임피던스를 포함한 안테나의 전기적 속성이 조정될 수 있다.
Patent KR-20000042943-A (KR)
Title: Method for informing manager of system errors in real time
Inventor: KIM SEONG JOONG
IPC: H04B3/46
Filed: 1998-12-28
Abstract: PURPOSE: A method for informing managers of system errors in a real time is provided to inform system managers of error contents in a real time by using a dialing function when the system has errors, to inform an assigned manager or many managers, according to the error contents. CONSTITUTION: A system has a database and a dialing module. The database manages managers phone numbers, a priority order, and error messages. A method for informing managers of system errors in a real time comprises the steps of: if the system has errors, checking the managers phone numbers, the priority order in the database; dialing a detected manager phone number in the dialing module; and if the dialed manager is connected, transmitting error messages to the manager.
Patent KR-20000043183-A (KR)
Title: Data access device of synchronous memory
Inventor: CHOI YUN HUI
IPC: G11C11/407
Filed: 1998-12-28
Abstract: PURPOSE: A data access device of a synchronous memory is provided to stabilize a system operation. CONSTITUTION: A NOR gate compounds the reverse signal of a column address signal and the output signal of a NAND gate. The NOR gate outputs a logic high level signal as an output signal. Upon transiting the column address signal to a logic high level, the output signal of an inverter(11) is reversed to a logic low signal so that the output signal of the NAND gate is transited to a logic high signal. Thus, the transited NAND gate and the NOR gate outputs logic high level signal as an output signal. Thereby, time is delayed through the inverter, NAND gate and the NOR gate.
Patent KR-20000043673-A (KR)
Title: Magnesia-graphite based thermal spray material and preparation method thereof
Inventor: KIM IN SOOL
IPC: C04B35/035
Filed: 1998-12-29
Abstract: PURPOSE: A magnesia-graphite based thermal spray material and its preparation method are provided, which material is used to hot repair the damaged region of refractory product. CONSTITUTION: A magnesia-graphite based thermal spray material comprises 35-83 wt% of magnesia-graphite waste refractory material; 10-30 wt% of chromium rock powder; 5-20 wt% of silica powder; and 2-15 wt% of alumina powder. The method comprises the steps of mixing a large particle size of magnesia-graphite waste refractory crushed one and a certain amount of a small particle size of silica powder to prepare the first mixture; mixing a large particle size of chromium rock powder and the rest of a small particle size of silica powder to prepare the second mixture; and mixing the first mixture, the second mixture and a small particle size of alumina powder.
Patent KR-20000045240-A (KR)
Title: Driver
Inventor: LEE YONG WON
IPC: H03K17/00
Filed: 1998-12-30
Abstract: PURPOSE: A driver is provided to prevent pull-up and pull-down transistors from being turned on at the same time. CONSTITUTION: A driver circuit comprises a delay section(31), first and second multiplexers(32,33), a NAND gate(34), a NOR gate(35), a pull-up transistor(36) and a pull-down transistor(37). The delay section(31) consists of a schmitt trigger inverter, and delays input data. Each of the first and second multiplexers(32,33) receives an output signal from the delay section(31) and the data, and outputs either one of the received signals in response to the data. The NAND gate(34) receives an inverted version of an output signal of the first multiplexer(32) and an output enable signal(OE), and the NOR gate(35) receives an inverted version of an output signal of the second multiplexer(33) and an inverted version of the output enable signal. The transistors(36,37) are connected in series between a power terminal and a ground terminal, and are driven by the NAND gate(35) and the NOR gate(36), respectively.
Patent KR-20000047324-A (KR)
Title: Disposable absorbent article
Inventor: LEE GAB JU
IPC: A61F13/76
Filed: 1998-12-31
Abstract: PURPOSE: A disposable absorbent article is provided which forms a leg band as a leak preventing means at an adhesive point between an absorbent core and a barrier cuff, so it has a good leak preventing effect. CONSTITUTION: In disposable absorbent article having a liquid permeable top-sheet, a liquid impermeable back-sheet, an absorbent core composed of fluff pulp, super absorbent polymer and tissue, a concluding means and a leak preventing means, a disposable absorbent article has the leak preventing means, which is comprised of a leg elastics and the barrier cuff at the both outsides of the absorbent core, and the leg elastics, which is comprised of an adhesive part of barrier cuff and the end of its adhesive part.
Patent KR-19990036346-A (KR)
Title: 메모리시험장치
IPC: G11C29/56
Filed: 1997-08-11
Abstract: 동작이 느린 DRAM을 사용하여 고속동작이 가능한 불량해석 메모리를 구성한다.  근접한 시험사이클에 있어서, 동일 어드레스가 다수회에 걸쳐서 액세스되는 경우에, 그 어드레스에 있어서 페일러가 발생하더라도 페일러데이터의 기록회수를 저감시키는 페일러데이터 압축부(13)를 설치하고, 이 페일러데이터 압축부에 의하여 페일러데이터의 기록회수를 저감시켜, 불량해석 메모리(FM)의 인터리브수를 저감시켜 적은 수의 메모리 소자에 의하여 불량해석 메모리를 구성한다.
Patent KR-19990044144-A (KR)
Title: 반복된 데이터 선택을 이용하는 통신 시스템
IPC: H03M13/05
Filed: 1996-08-23
Abstract: 데이터 스트림의 다중 인스턴스로부터 단일 데이터 스트림을 조합하기 위한 새롭고 개선된 시스템 및 방법이 기술된다. 셀룰라 전화 가입자 유니트(100)로부터 전송된 데이터는 일 세트의 송수신 기지국(102)에 의해 수신된다. 각 송수신 기지국은 프레임(300)으로 참조되는 데이터의 세그먼트상에 다양한 에러 검출 서브루틴을 수행한다. 이들 에러 검출 서브루틴은 CRC 검사 합 검증, 야마모토 메트릭 계산, 재인코딩된 신호 에러 레이트 계산, 또는 그들의 조합을 포함할 수 있다. 에러 검출 서브루틴의 결과는 프레임 품질 메트릭(308)내에 놓여진다. 프레임(200), 프레임 품질 메트릭(308), 타임 스탬프(310) 및 어드레스(312)는 타임 스탬프를 이용하여 동일한 정보를 전송하는 것을 시도하는 패킷(305)과 매칭하며 연관된 프레임 품질 메트릭(308)을 기초로 후처리를 위해 패킷(305)으로부터 하나의 프레임(300)을 선택하는 이동 전화 교환국(104)으로 송수신 기지국에서 전송되는 패킷(305)내에 놓여진다.
Patent KR-19990044423-A (KR)
Title: 동일 계에서 생성되는 층상 기공 구조의 미공질 막 및 그의 제조 방법
IPC: C08L27/18
Filed: 1996-09-05
Abstract: 각층이 피브릴로 내부 연결된 노드를 특징으로하고, 층들이 막 재료의 융점 이하의 온도에서 소성 흐름에 의해 결합되며, 기공 구조가 팽창 공정에 의해 그 자리에서 형성되는 2개 이상의 층들을 포함하는 미공질 막이 기재되어 있다.  층상 미공질 막은 각 층의 기공 구조가 별도로 조절되어 생성될 수 있다.  제품은 기공 크기 구배가 필요한 여과 및 의료용으로 유용하다.
Patent KR-19990063881-A (KR)
Title: 다수의 표면 에너지 변화도를 나타내는 비직물 웨브를 선택적으로 천공하는 방법
IPC: A61F5/44
Filed: 1996-09-12
Abstract: 본 발명은, 한 바람직한 실시예에 있어서, 다수의 표면 에너지 변화도를 나타내는 비직물 웨브(22)를 선택적으로 천공하는 방법에 관한 것이다.  본 발명의 방법은 표면 에너지를 나타내는 섬유의 비직물 웨브(22)를 제공하는 단계로서, 상기 비직물 웨브는 제 1 표면(61), 제 2 표면(62) 및 상기 제 1 및 제 2 표면(61, 62)을 서로 유체 연통되게 설치하는 다수의 유체 통로를 갖는, 상기 비직물 웨브 제공 단계와, 상기 비직물 웨브(22)의 상기 제 1 표면(61)에 표면 처리제를 도포하는 단계로서, 상기 표면 처리제는 상기 비직물 웨브(22)의 섬유의 표면보다 낮은 표면 에너지를 가지므로 상기 제 1 표면(61)과 접촉하는 유체에 힘을 인가하여 상기 유체가 상기 제 1 표면(61)으로부터 멀어지는 상기 제 2 표면(62) 방향으로의 수송을 위해 상기 유체 통로를 향해 지향되도록 하기에 적합한 불연속적으로 이격된 영역에 의해 규정되는 다수의 표면 에너지 변화도를 생성하는, 상기 표면 처리제 도포 단계와, 약해지고 용융안정화된 위치(weakened, melt-stabilized locations)를 생성하도록 다수의 위치에서 상기 비직물 웨브(22)를 취약하게 하는 단계와, 상기 약해지고 용융안정화된 위치에서 상기 비직물 웨브(22)를 파열시키도록 상기 비직물 웨브(22)에 인장력을 인가하여, 상기 비직물 웨브(22)내에 상기 약해지고 용융안정화된 위치와 일치하는 다수의 구멍을 생성하는 단계를 포함한다.  웨브(22)는 특히, 일회용 흡수 제픔상의 상부 시트에 적합하다.