KR970001425A - 열가소성수지 미다공막의 제조방법 - Google Patents

열가소성수지 미다공막의 제조방법 Download PDF

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KR970001425A
KR970001425A KR1019960021923A KR19960021923A KR970001425A KR 970001425 A KR970001425 A KR 970001425A KR 1019960021923 A KR1019960021923 A KR 1019960021923A KR 19960021923 A KR19960021923 A KR 19960021923A KR 970001425 A KR970001425 A KR 970001425A
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thermoplastic resin
bubble
microporous membrane
producing
resin microporous
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KR1019960021923A
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KR100426092B1 (ko
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고이치 고노
고타로 다키타
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요코구라 다다시
도넨 가가쿠 가부시키가이샤
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0002—Organic membrane manufacture
    • B01D67/0023—Organic membrane manufacture by inducing porosity into non porous precursor membranes
    • B01D67/0025—Organic membrane manufacture by inducing porosity into non porous precursor membranes by mechanical treatment, e.g. pore-stretching
    • B01D67/0027—Organic membrane manufacture by inducing porosity into non porous precursor membranes by mechanical treatment, e.g. pore-stretching by stretching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/26—Polyalkenes
    • B01D71/261—Polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/26—Polyalkenes
    • B01D71/262—Polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/005—Shaping by stretching, e.g. drawing through a die; Apparatus therefor characterised by the choice of materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/411—Organic material
    • H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
    • H01M50/417—Polyolefins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
    • H01M50/491—Porosity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2323/00—Details relating to membrane preparation
    • B01D2323/08—Specific temperatures applied
    • B01D2323/081—Heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2323/00—Details relating to membrane preparation
    • B01D2323/08—Specific temperatures applied
    • B01D2323/082—Cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2323/00—Details relating to membrane preparation
    • B01D2323/12—Specific ratios of components used
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/065—HDPE, i.e. high density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0058—Liquid or visquous
    • B29K2105/0061—Gel or sol
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

응력집중체를 열가소성수지에 충전하지 않고, 균일하면서 미세한 미다공을 가지는 투과성이 우수한 열가소성수지 미다공막의 제조방법이 제공된다.
즉, 기포사이즈(A)와 기포벽면 두께(B)의 비 B/A가 0.5 미만의 미세한 기포를 내부에 가지고 있고, 또한 공간율이 50% 이상의 열가소성수지 발포체에, 기포의 형상변형을 넘는 기포경계자신의 소성변형을 행함으로써, 기포경계를 파괴하는 열가소성수지 미다공막의 제조방법에 제공된다.

Description

열가소성수지 미다공막의 제조방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음

Claims (7)

  1. 기포사이즈(A)와 기포벽면의 두께(B)의 비 B/A가 0.5 미만의 미세한 기포를 내부에 가지고 있고, 또한 공간율이 50% 이상의 열가소성수지 발포체에, 기포의 형상변형을 넘는 기포경계자체의 소성변형을 행함으로써, 기포경계를 파괴하는 것을 특징으로 하는 열가소성수지 미다공막의 제조방법.
  2. 제1항에 있어서, 기포사이즈(A)와 기포벽면 두께(B)의 비 B/A가 0.3 미만이고, 또한 공간율이 70% 이상인 것을 특징으로 하는 열가소성수지 미다공막의 제조방법.
  3. 제1항 또는 제2항에 있어서, 열가소성수지 발포체가, 열가소성수지의 용액을 냉각하는 것에 의한 저밀도 젤화에 의해서 얻어진 것인 특징으로 하는 열가소성수지 미다공막의 제조방법.
  4. 제1항 또는 제2항에 있어서, 열가소성수지 발포체가, 열가소성수지에 유기분해형 발포제를 혼입한 후, 상기 발포제를 온도변화에 의해서 분해발포시켜서 얻어진 것을 특징으로 하는 열가소성수지 미다공막의 제조방법.
  5. 제1항에 있어서, 열가소성수지 발포체가 고밀도 폴리에틸렌을 포함하는 것을 특징으로 하는 열가소성수지 미다공막의 제조방법.
  6. 제1항에 있어서, 열가소성 변형이 스트레칭 또는 칼렌더링 후 정해진 스트레칭에 의해 수행되는 것을 특징으로 하는 열가소성수지 미다공막의 제조방법.
  7. 제1항에 따른 제조방법에 의해서 얻어진 것을 특징으로 하는 열가소성수지 미다공막.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019960021923A 1995-06-19 1996-06-18 열가소성수지미다공막및그의제조방법 KR100426092B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP17550295A JP3493079B2 (ja) 1995-06-19 1995-06-19 熱可塑性樹脂微多孔膜の製造方法
JP95-175502 1995-06-19

Publications (2)

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KR970001425A true KR970001425A (ko) 1997-01-24
KR100426092B1 KR100426092B1 (ko) 2005-02-03

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ID=15997171

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US (1) US5853633A (ko)
EP (1) EP0754488B1 (ko)
JP (1) JP3493079B2 (ko)
KR (1) KR100426092B1 (ko)
CA (1) CA2179369C (ko)
DE (1) DE69625413T2 (ko)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5786396A (en) * 1996-08-21 1998-07-28 Tonen Chemical Corporation Method of producing microporous polyolefin membrane
WO1999021914A1 (fr) * 1997-10-23 1999-05-06 Tonen Sekiyukagaku Kk Procede de preparation d'un film polyolefinique microporeux hautement permeable
US20020132107A1 (en) * 1998-05-15 2002-09-19 O'brien Jeffrey James Porous polyethylene membrane
US6180015B1 (en) * 1998-05-29 2001-01-30 Mitsubishi Plastics, Inc. Plastic filter for a photograph developing apparatus
KR100591061B1 (ko) * 1998-10-01 2006-06-19 토넨 케미칼 코퍼레이션 폴리올레핀 미세다공성막 및 그것의 제조방법
WO2000020493A1 (en) * 1998-10-01 2000-04-13 Tonen Chemical Corporation Microporous polyolefin film and process for producing the same
US7713356B2 (en) * 2000-06-06 2010-05-11 Nitto Denko Corporation Cleaning sheet, conveying member using the same, and substrate processing equipment cleaning method using them
US7793668B2 (en) * 2000-06-06 2010-09-14 Nitto Denko Corporation Cleaning sheet, conveying member using the same, and substrate processing equipment cleaning method using them
US20060105164A1 (en) * 2000-06-06 2006-05-18 Nitto Denko Corporation Cleaning sheet, conveying member using the same, and substrate processing equipment cleaning method using them
TW539705B (en) * 2000-06-30 2003-07-01 Tonen Sekiyukagaku Kk Process for preparing heat curable resin micro-porous film
DE10033401A1 (de) * 2000-07-08 2002-01-17 Univ Twente Fakultaet Chemisch Membran und deren Verwendung
EP1334313A2 (en) * 2000-10-09 2003-08-13 The Dial Corporation Method and apparatus for fastening a fluid transport mechanism to a container
JP4801841B2 (ja) * 2001-02-19 2011-10-26 東レ東燃機能膜合同会社 熱可塑性樹脂微多孔膜の洗浄方法およびこれを利用した熱可塑性樹脂微多孔膜の製造方法
JP4734520B2 (ja) * 2001-03-02 2011-07-27 東レ東燃機能膜合同会社 熱可塑性樹脂微多孔膜の製造方法
DE10145968B4 (de) * 2001-09-18 2004-04-15 Sartorius Ag Filtrationsmembran
US20050112462A1 (en) * 2003-11-21 2005-05-26 Marple Jack W. High discharge capacity lithium battery
US8007940B2 (en) * 2001-12-11 2011-08-30 Eveready Battery Company, Inc. High discharge capacity lithium battery
US20050118414A1 (en) * 2002-06-19 2005-06-02 Nitto Denko Corporation Cleaning sheets, transfer member having cleaning function, and method of cleaning substrate-processing apparatus with these
JP2004275743A (ja) * 2003-02-26 2004-10-07 Nishikawa Rubber Co Ltd 化粧用塗布具
WO2005001956A2 (en) * 2003-06-06 2005-01-06 Amtek Research International Llc Battery separators containing reactive functional groups
US7718255B2 (en) * 2003-08-19 2010-05-18 Nitto Denko Corporation Cleaning sheets and method of cleaning with the same
US8124274B2 (en) * 2003-11-21 2012-02-28 Eveready Battery Company, Inc. High discharge capacity lithium battery
US20050233214A1 (en) * 2003-11-21 2005-10-20 Marple Jack W High discharge capacity lithium battery
US8283071B2 (en) 2003-11-21 2012-10-09 Eveready Battery Company, Inc. High discharge capacity lithium battery
US20050200046A1 (en) * 2004-03-10 2005-09-15 Breese D. R. Machine-direction oriented multilayer films
US20060008636A1 (en) * 2004-07-06 2006-01-12 Lee Young K Microporous polyethylene film and method of producing the same
JP4716687B2 (ja) * 2004-07-26 2011-07-06 日東電工株式会社 粘着テープ又はシートの製造方法及び製造装置
DE102005016039B4 (de) * 2005-04-07 2007-09-27 Sartorius Biotech Gmbh Verfahren zum Öffnen der Hautschicht von Kunststoffschaumbahnen
KR100943235B1 (ko) * 2005-05-16 2010-02-18 에스케이에너지 주식회사 압출혼련성과 물성이 우수한 고밀도폴리에틸렌 미세다공막및 그 제조방법
US8795565B2 (en) * 2006-02-21 2014-08-05 Celgard Llc Biaxially oriented microporous membrane
US10615388B2 (en) * 2006-03-22 2020-04-07 Celgard, Llc Membrane made of a blend of UHMW polyolefins
JP5507079B2 (ja) * 2006-04-28 2014-05-28 旭化成ケミカルズ株式会社 気体分離膜
DE102007001665A1 (de) * 2007-01-11 2008-07-17 Raumedic Ag Gasaustauschmembran insbesondere zum Einsatz in einer künstlichen Lunge sowie Verfahren zur Herstellung einer derartigen Gasaustauschmembran
US20100255376A1 (en) * 2009-03-19 2010-10-07 Carbon Micro Battery Corporation Gas phase deposition of battery separators
DE102012001544A1 (de) 2012-01-16 2013-07-18 Ewald Dörken Ag Verfahren zur Herstellung einer Mikrofiltrationsmembran und Mikrofiltrationsmembran
DE102012001524A1 (de) * 2012-01-16 2013-07-18 Ewald Dörken Ag Verfahren zur Herstellung einer hydrophilen Polymermembran und Polymermembran
US11524430B2 (en) * 2017-11-29 2022-12-13 Kyoraku Co., Ltd. Structure, and method for manufacturing same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60238334A (ja) * 1984-05-11 1985-11-27 Takiron Co Ltd 軟質１．２−ポリブタジエンの極薄架橋発泡薄膜体とその製造方法
DE3676211D1 (de) * 1985-02-25 1991-01-31 Tonen Corp Mikroporoese membran aus einem alpha-olefinpolymer mit ultrahoch-molekulargewicht.
US5422377A (en) * 1994-04-06 1995-06-06 Sandia Corporation Microporous polymer films and methods of their production

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Publication number Publication date
DE69625413T2 (de) 2003-07-10
EP0754488A1 (en) 1997-01-22
US5853633A (en) 1998-12-29
JPH093238A (ja) 1997-01-07
DE69625413D1 (de) 2003-01-30
CA2179369A1 (en) 1996-12-20
JP3493079B2 (ja) 2004-02-03
EP0754488B1 (en) 2002-12-18
CA2179369C (en) 2003-09-16
KR100426092B1 (ko) 2005-02-03

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