KR20200047451A - 복합 다공성막 및 이의 제조 방법과 용도 - Google Patents
복합 다공성막 및 이의 제조 방법과 용도 Download PDFInfo
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- KR20200047451A KR20200047451A KR1020197035820A KR20197035820A KR20200047451A KR 20200047451 A KR20200047451 A KR 20200047451A KR 1020197035820 A KR1020197035820 A KR 1020197035820A KR 20197035820 A KR20197035820 A KR 20197035820A KR 20200047451 A KR20200047451 A KR 20200047451A
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- film
- porous membrane
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Images
Classifications
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/228—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
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Abstract
Description
도 2는 본 발명의 비교예1에 따른 복합 다공성막의 주사 전자 현미경 사진이다.
도 3은 본 발명에 따른 복합 다공성막을 제조하는 장치이다.
Claims (10)
- 적어도 한 층의 다공성 베이스층과 상기 다공성 베이스층의 적어도 일측 표면에 위치된 한 층의 일축 연신 코팅층을 포함하는 복합 다공성막.
- 제1항에 있어서,
상기 복합 다공성막은 이축 연신된 다공성 베이스층과 상기 다공성 베이스층의 적어도 일측 표면에 위치된 일축 연신 코팅층을 포함하고,
바람직하게, 상기 복합 다공성막은 상기 다공성 베이스층의 적어도 일측 표면에 위치된 이축 연신 코팅층을 더 포함하며,
바람직하게, 상기 복합 다공성막은 상기 다공성 베이스층과 일축 연신 코팅층 사이의 적어도 일측 표면에 이축 연신 코팅층을 더 포함하고,
바람직하게, 상기 다공성 베이스층의 적어도 일측 표면에 위치된 상기 일축 연신 코팅층은 다공성의 코팅층이거나, 또는 비다공성의 치밀한 코팅층이며
바람직하게, 상기 다공성 베이스층의 적어도 일측 표면에 위치된 상기 이축 연신 코팅층은 다공성의 코팅층이거나, 또는 비다공성의 치밀한 코팅층인 복합 다공성막. - 제1항에 있어서,
상기 복합 다공성막은 적어도 한 층의 다공성 베이스층과 상기 다공성 베이스층의 일측 또는 양측 표면에 위치된 복합 다공성막의 가로연신 방향으로 배향된 적어도 한 층의 나노 섬유상의 비폴리올레핀계 중합체 다공성층을 포함하고,
바람직하게, 상기 복합 다공성막은 적어도 한 층의 다공성 베이스층과 복합 다공성막의 가로연신 방향으로 배향된 적어도 한 층의 나노 섬유상의 비폴리올레핀계 중합체 다공성층을 포함하며;
바람직하게, 상기 복합 다공성막은 한 층의 다공성 베이스층과 복합 다공성막의 가로연신 방향으로 배향된 한 층의 나노 섬유상의 비폴리올레핀계 중합체 다공성층을 포함하고; 상기 복합 다공성막의 가로연신 방향으로 배향된 나노 섬유상의 비폴리올레핀계 중합체 다공성층은 상기 다공성 베이스층의 일측 표면에 위치되거나; 또는
상기 복합 다공성막은 한 층의 다공성 베이스층과 복합 다공성막의 가로연신 방향으로 배향된 두 층의 나노 섬유상의 비폴리올레핀계 중합체 다공성층을 포함하며; 상기 복합 다공성막의 가로연신 방향으로 배향된 나노 섬유상의 비폴리올레핀계 중합체 다공성층은 상기 다공성 베이스층의 양측 표면에 위치되고,
바람직하게, 상기 비폴리올레핀계 중합체는 비폴리에틸렌계 중합체, 비폴리프로필렌계 중합체이며; 바람직하게, 상기 비폴리올레핀계 중합체는 비폴리프로필렌계 중합체이고,
바람직하게, 상기 나노 섬유의 직경은 10 ~ 500 nm이며, 바람직하게는 15 ~ 250 nm인 복합 다공성막. - 제1항 내지 제3항 중 어느 한 항에 있어서,
상기 다공성 베이스층은 다공성 폴리올레핀 베이스층으로부터 선택되고, 상기 다공성 폴리올레핀 베이스층으로, 특히 다공성 폴리에틸렌 베이스층, 다공성 폴리프로필렌 베이스층 또는 다공성 폴리프로필렌/폴리에틸렌/폴리프로필렌의 3층 복합 베이스층을 사용하는 것이 유리한, 더 바람직하게, 상기 다공성 베이스층은 다공성 폴리프로필렌 베이스층인 복합 다공성막. - 제1항, 제2항 또는 제4항에 따른 복합 다공성막의 제조 방법으로서, 상기 방법은,
(S1) 폴리프로필렌에 β결정형의 형성을 촉진시킬 수 있는 조핵제를 첨가하는 단계;
(S2) 단계(S1)의 조핵제가 혼합된 폴리프로필렌을 용융 압출, 성형하여 고β결정막을 얻는 단계;
(S3) 고β결정막을 세로연신하여 세로연신막을 얻고, 코팅액을 상기 세로연신막의 일측 또는 양측 표면에 도포하는 단계;
(S4) 코팅액이 도포된 세로연신막을 가로 연신하여 상기 복합 다공성막을 얻는 단계;를 포함하고,
바람직하게, 상기 제조 방법의 단계(S2)와 단계(S3) 사이에,
(S2') 코팅액을 단계(S2)에서 얻은 고β결정막의 일측 또는 양측 표면에 도포하여, 코팅액이 도포된 고β결정막을 얻는 단계를 더 포함하며,
바람직하게, 단계(S3) 및 단계(S2') 에서, 상기 코팅액은 유기 용매를 매질로 사용하는 용액 또는 물을 매질로 사용하는 용액 또는 분산액을 포함하고;
상기 유기 용매를 매질로 사용하는 용액은 중합체 또는 중합체 조성물을 유기 용매로 용해시켜 형성된 용액을 포함하며; 상기 물을 매질로 사용하는 용액은 수용성 중합체 또는 수용성 중합체 조성물을 물로 용해시켜 형성된 용액을 포함하고; 상기 물을 매질로 사용하는 분산액은 물에 용해되지 않는 중합체 또는 물에 용해되지 않는 중합체 조성물을 유화중합하는 방법으로 얻은 중합체 또는 중합체 조성물의 유액, 또는 물에 용해되지 않는 중합체 또는 물에 용해되지 않는 중합체 조성물을 연마 또는 분쇄하는 방법으로 얻은 중합체 또는 중합체 조성물을 함유한 수분산체를 포함하며,
바람직하게, 상기 유기 용매를 매질로 사용하는 용액 또는 물을 매질로 사용하는 용액 또는 분산액은 무기 충진재를 더 포함할 수 있고,
바람직하게, 상기 유기 용매를 매질로 사용하는 용액에서, 상기 중합체 또는 중합체 조성물은 폴리비닐리덴플루오라이드(Polyvinylidene fluoride), 비닐리덴플루오라이드-헥사플루오로프로필렌(Vinylidene fluoride-hexafluoropropylene) 공중합체, 폴리아크릴로니트릴(Polyacrylonitrile), 폴리비닐리덴클로라이드(Polyvinylidene chloride), 폴리메타크릴레이트(Polymethacrylate), 폴리에틸렌, 폴리에틸렌왁스(Polyethylene wax), 염화 폴리에틸렌(Chlorinated polyethylene), 염화 폴리프로필렌(Chlorinated Polypropylene), 폴리비닐알코올(Polyvinyl alcohol), 폴리우레탄(Polyurethane), 메타크릴레이트(Methacrylate)와 아크릴로니트릴(Acrylonitrile)의 공중합체, 폴리옥시에틸렌에테르(Polyoxyethylene ether), 알긴산나트륨(Sodium alginate), 셀룰로오스 유도체, 폴리디메틸실록산(Polydimethylsiloxane), 폴리이미드(Polyimide), 폴리우레탄, 폴리스티렌술폰산나트륨(Sodium polystyrenesulfonate), 술폰화 폴리에테르에테르케톤(Sulfonated polyetheretherketone), 폴리비닐알콜비닐술폰산그라프트(Polyvinyl alcohol vinyl sulfonic acid graft) 공중합체, 술폰화폴리술폰(Sulfonated polysulfone), 술폰화 폴리벤즈이미다졸(Sulfonated polybenzimidazole), 술폰화폴리페닐퀴놀린(Sulfonated polyphenylquinoline), 퍼플루오로술폰산(Perfluorosulfonic acid) 중합체(예를 들어 Nafion) 중의 하나 또는 여러 가지를 포함하며,
바람직하게, 상기 유기 용매를 매질로 사용하는 용액에서, 상기 유기 용매는 아세톤(Acetone), 부타논(Butanone) 등과 같은 케톤계의 용매로부터 선택될 수 있고, 메탄올(Methanol), 에탄올(ethanol) 등과 같은 알코올계 용매로부터 선택될 수도 있으며, 클로로메탄(Chloromethane), 디클로로메탄(Dichloromethane), 클로로포름(chloroform), 사염화탄소(Carbon tetrachloride) 등과 같은 할로겐화 탄화수소계 용매로부터 선택될 수도 있고, N,N-디메틸포름아미드(N,N-dimethylformamide), N,N-디메틸아세트아미드(N,N-dimethylacetamide) 등과 같은 아미드계 용매로부터 선택될 수도 있으며, 벤젠(benzene), 톨루엔(toluene), 자일렌(xylene) 등과 같은 벤젠계 용매로부터 선택될 수도 있고, 테트라히이드로푸란(Tetrahydrofuran), N-메틸피롤리돈(N-methylpyrrolidone), 디메틸술폭시드(Dimethyl sulfoxide), 에틸에테르(ethyl ether)으로부터 선택될 수도 있으며,
바람직하게, 상기 물을 매질로 사용하는 용액에서, 상기 수용성 중합체 또는 수용성 중합체 조성물은 폴리비닐알코올, 폴리옥시에틸렌에테르, 알긴산나트륨, 소듐카르복시메틸셀룰로오스(Sodium carboxymethyl cellulose), 폴리아크릴아미드(Polyacrylamide), 키토산(Chitosan), 콘작글루코만난(Konjac glucomannan) 중의 하나 또는 여러 가지를 포함하고,
바람직하게, 상기 물을 매질로 사용하는 분산액에서, 상기 물에 용해되지 않는 중합체 또는 물에 용해되지 않는 중합체 조성물은 폴리비닐리덴플루오라이드, 폴리비닐리덴클로라이드, 폴리테트라플루오로에틸렌(Polytetrafluoroethylene), 비닐리덴플루오라이드-헥사플루오로프로필렌 공중합체, 폴리스티렌(Polystyrene), 폴리메틸메타크릴레이트(Polymethylmethacrylate), 폴리우레탄, 퍼플루오로술폰산 중합체(예를 들어 Nafion) 중의 하나 또는 여러 가지를 포함하는 복합 다공성막의 제조 방법. - 제1항, 제3항 또는 제4항 중 어느 한 항에 따른 복합 다공성막의 제조 방법으로서, 상기 방법은,
세로연신막의 일측 또는 양측 표면에 코팅액을 도포하고, 다시 가로연신하여 상기 복합 다공성막을 제조하여 얻는 단계를 포함하며,
바람직하게, 상기 세로연신막은 코팅된 후, 다시 가로연신과정을 거치고, 세로연신막은 가로연신 처리되어 본 발명의 다공성 베이스층을 제조하여 얻으며; 코팅액은 가로연신 처리되어 복합 다공성막의 가로연신 방향으로 배향된 나노 섬유상의 비폴리올레핀계 중합체 다공성층을 제조하여 얻고,
바람직하게, 상기 세로연신막의 공극율은 5 ~ 35 %이며, 더 바람직하게, 상기 세로연신막의 공극율은 15 ~ 35 %이고, 바람직하게, 상기 세로연신막의 두께는 16 ~ 80 μm이며; 더 바람직하게, 상기 세로연신막의 두께는 20 ~ 60 μm이고,
바람직하게, 상기 복합 다공성막은,
1) 폴리프로필렌에 β결정형의 형성을 촉진시킬 수 있는 조핵제를 첨가하고, 조핵제가 혼합된 폴리프로필렌을 용융 압출, 성형하여 고β결정막을 얻는 단계;
2) 고β결정막을 세로연신하여 세로연신막을 얻고, 코팅액을 상기 세로연신막의 일측 또는 양측 표면에 도포하며, 다시 가로연신하여 상기 복합 다공성막을 제조하여 얻은 단계;를 포함하는 방법에 의해 제조될 수 있고,
바람직하게, 상기 고β결정막의 두께는 80 ~ 300 μm이며, 더 바람직하게, 상기 고β결정막의 두께는 100 ~ 200 μm이고,
바람직하게, 단계(S3) 및 단계2)에서, 상기 세로연신의 온도는 60 ~ 120 ℃이며, 바람직하게, 상기 세로연신의 온도는 80 ~ 110 ℃이고; 상기 세로연신의 배율은 2.5 ~ 5.5배이며, 바람직하게, 상기 세로연신의 배율은 3 ~ 5배이고; 상기 코팅액 건조 후 얻은 두께는 0.3 ~ 10 μm이며; 바람직하게, 건조 후 얻은 상기 코팅액의 두께는 2 ~ 10 μm이고, 바람직하게는 3 ~ 5 μm이며,
바람직하게, 단계(S4) 및 단계2)에서, 상기 가로연신의 온도는 120 ~ 150 ℃이고; 상기 가로연신의 배율은 2 ~ 5배이며; 더 바람직하게, 상기 가로연신의 온도는 130 ~ 140 ℃이고; 상기 가로연신의 배율은 2.5 ~ 4.5배이며,
바람직하게, 상기 복합 다공성막은,
a) 폴리프로필렌을 용융 압출하고, 고속 연신 배향에 의해 성형하여 폴리프로필렌 초기 필름을 얻는 단계;
b) 폴리프로필렌 초기 필름을 고온 어닐링하여 폴리프로필렌 프리스트레치 필름(pre-stretche film)를 얻는 단계;
c) 건식 일축 연신 공정에 의해 폴리프로필렌 프리스트레치 필름을 연신하여 세로연신막을 얻고, 세로연신막의 일측 또는 양측 표면에 코팅액을 도포하며, 다시 가로연신하여 상기 복합 다공성막을 제조하여 얻는 단계;를 포함하는 방법에 의해 제조될 수도 있고,
단계c)는 구체적으로,
c') 폴리프로필렌 프리스트레치 필름을 다층 적층 처리하고, 20 ~ 50 ℃의 온도 하에서 20 ~ 50 %으로 프리스트레치한 후, 100 ~ 130 ℃의 온도 하에서 계속하여 30 ~ 80 % 연신하며, 선택적으로 연신된 후 다층 적층된 세로연신막을 박리하여 분리함으로써 세로연신막을 얻고; 다음, 세로연신막의 일측 또는 양측 표면에 코팅액을 도포하며, 다시 가로연신하여 상기 복합 다공성막을 제조하여 얻는 단계;를 포함하고,
바람직하게, 단계c)에서, 상기 다층 적층 처리는 적어도 한 층의 폴리프로필렌 프리스트레치 필름을 적층 처리하는 것일 수 있으며, 연신 후 적어도 한 층을 포함하는 세로연신막을 제조하여 얻고; 더 바람직하게, 8 ~ 16층의 폴리프로필렌 프리스트레치 필름을 적층 처리하며, 연신 후 층간 박리하여 1 ~ 4층을 포함하는 세로연신막을 얻고,
바람직하게, 상기 코팅액은 물을 매질로 사용하는 분산액이며; 상기 코팅액은 물에 용해되지 않는 중합체 또는 물에 용해되지 않는 중합체 조성물을 포함하고; 상기 물에 용해되지 않는 중합체 또는 물에 용해되지 않는 중합체 조성물은 과립 형태로 체계에 분산되며, 상기 과립의 평균 직경은 0.01 ~ 3 μm이고, 더 바람직하게는 0.1 ~ 1 μm이며,
바람직하게, 상기 물을 매질로 사용하는 분산액은 물에 용해되지 않는 중합체 또는 물에 용해되지 않는 중합체 조성물을 유화중합하는 방법으로 얻은 중합체 또는 중합체 조성물의 유액일 수 있거나, 또는 물에 용해되지 않는 중합체 또는 물에 용해되지 않는 중합체 조성물을 연마 또는 분쇄하는 방법으로 얻은 중합체 또는 중합체 조성물을 함유한 수분산체일 수도 있고,
바람직하게, 상기 물에 용해되지 않는 중합체 또는 물에 용해되지 않는 중합체 조성물의 유리전이온도 또는 용점은 가로연신 온도보다 낮으며,
바람직하게, 상기 물에 용해되지 않는 중합체 또는 물에 용해되지 않는 중합체 조성물은 폴리비닐리덴플루오라이드, 폴리비닐리덴클로라이드, 비닐리덴플루오라이드-헥사플루오로프로필렌 공중합체, 폴리스티렌, 폴리메틸메타크릴레이트, 폴리부틸렌숙시네이트(Polybutylene succinate), 폴리우레탄, 퍼플루오로술폰산 중합체(예를 들어 Nafion) 중의 하나 또는 여러 가지를 포함하고,
바람직하게, 물을 매질로 사용하는 분산액에서 상기 물에 용해되지 않는 중합체 또는 물에 용해되지 않는 중합체 조성물의 질량 백분 함량은 5 ~ 50 %이고, 더 바람직하게는 10 ~ 30 %이며,
바람직하게, 상기 물을 매질로 사용하는 분산액에서 물의 질량 백분 함량은 50 ~ 95 %이고, 더 바람직하게는 70 ~ 90 %이며
바람직하게, 상기 코팅액은 유기 충진재 또는 무기 충진재를 더 포함하고; 상기 무기 충진재는 실리카, 이산화티탄, 산화란타늄, 이산화지르코늄, 산화알루미늄, 황산바륨, 탄산칼슘, 질화탄소, 뵘석, 탄화규소, 분자체, 활석분, 벤토나이트 중의 하나 또는 여러 가지를 포함하며, 바람직하게, 상기 유기 충진재는 폴리테트라플루오로에틸렌, 폴리에테르에테르케톤(Polyetheretherketone), 폴리에테르설폰(Polyethersulfone), 폴리페닐에테르(polyphenyl ether) 중의 하나 또는 여러 가지와 같은 고온 내성 고분자를 포함하고,
바람직하게, 상기 유기 충진재의 첨가량은 코팅액의 5 ~ 10 wt%이며; 상기 무기 충진재의 첨가량은 코팅액의 5 ~ 20 wt%이고,
바람직하게, 상기 코팅액은 바인더를 더 포함하며; 상기 바인더는 폴리아크릴레이트 유액, 폴리우레탄 유액, 폴리부타디엔-스티렌(Polybutadiene-styrene) 유액, 폴리비닐알코올, 카르복시메틸셀룰로오스(Carboxymethyl cellulose) 등을 포함하고; 상기 바인더의 첨가량은 코팅액 질량의 2 ~ 8 wt%이며; 바람직하게는 3 ~ 6 wt%인 복합 다공성막의 제조 방법. - 제1항 내지 제4항 중 어느 한 항에 따른 복합 다공성막을 포함하는 리튬 전지 격막(separator).
- 제1항 내지 제4항 중 어느 한 항에 따른 복합 다공성막을 포함하는 가스 분리막.
- 제1항 내지 제4항 중 어느 한 항에 따른 복합 다공성막을 제조하는 장치로서,
상기 장치는 피딩 압출 시스템, 플로우 캐스팅(flow casting) 시스템, 세로연신 시스템, 제2 도포 시스템 및 가로연신 시스템을 포함하고;
상기 피딩 압출 시스템은 플로우 캐스팅 시스템에 의해 세로연신 시스템과 연결되며, 상기 세로연신 시스템은 제2 도포 시스템에 의해 가로연신 시스템과 연결되고,
바람직하게, 상기 피딩 압출 시스템은 피더, 스크류 압출기, 제1 용융 파이프, 필터 및 제2 용융 파이프를 포함하며; 상기 제2 용융 파이프는 플로우 캐스팅 시스템과 연결되고; 상기 피더는 상기 스크류 압출기의 공급구의 상방에 위치되며; 상기 스크류 압출기는 제1 용융 파이프에 의해 필터와 연결되고; 상기 필터는 제2 용융 파이프에 의해 플로우 캐스팅 시스템과 연결되며,
바람직하게, 상기 제1 용융 파이프에 계량 펌프가 더 구비되고,
바람직하게, 상기 플로우 캐스팅 시스템은 다이 헤드와 캐스팅 롤러를 포함하며; 상기 다이 헤드는 두께를 자동으로 조절 가능한 다이 헤드로부터 선택되고; 상기 캐스팅 롤러는 온도가 정확하게 제어되는 캐스팅 롤러로부터 선택되며,
바람직하게, 상기 장치는 제1 도포 시스템을 더 포함하고, 상기 제1 도포 시스템은 플로우 캐스팅 시스템과 세로연신 시스템 사이에 구비되며,
바람직하게, 상기 제1 도포 시스템은 제1 도포 부재를 포함하고; 상기 제2 도포 시스템은 제2 도포 부재를 포함하며,
바람직하게, 상기 세로연신 시스템은 온도가 정확하게 제어되는 예열, 연신 및 히트세트 롤러 세트를 포함하고, 상기 가로연신 시스템은 트랙, 체인, 오븐 및 동력전달 기구를 포함하며,
바람직하게, 상기 장치는 제조하여 얻은 복합 다공성막을 롤링된 다공성막으로 제조하기 위한 견인 롤링 시스템을 더 포함하고,
바람직하게, 상기 장치는 두께 측정 피드백 제어 시스템을 더 포함하며; 상기 두께 측정 피드백 제어 시스템은 두께 측정기와 제어 시스템을 포함하고; 상기 두께 측정기는 막의 두께를 온라인으로 측정하며, 제어 시스템을 제어하여 다이 헤드를 자동으로 조절함으로써, 다공성막 두께를 자동으로 제어할 수 있고,
바람직하게, 상기 두께 측정 피드백 제어 시스템은 제1 두께 측정 피드백 제어 시스템과 제2 두께 측정 피드백 제어 시스템을 포함하며, 상기 제1 두께 측정 피드백 제어 시스템은 플로우 캐스팅 시스템과 세로연신 시스템 사이에 구비되고, 상기 제2 두께 측정 피드백 제어 시스템은 가로연신 시스템 뒤에 구비되며,
바람직하게, 상기 제1 두께 측정 피드백 제어 시스템은 비연신된 필름의 두께를 측정하고 제어하거나 적어도 일측 표면에 코팅액이 코팅된 비연신된 필름의 두께를 측정하고 제어하기 위한 필름 두께 측정기를 포함하고,
바람직하게, 상기 제2 두께 측정 피드백 제어 시스템은 연신된 박막의 두께를 측정하고 제어하기 위한 박막 두께 측정기를 포함하며,
바람직하게, 상기 장치는 자동 제어 시스템을 더 포함하고; 상기 자동 제어 시스템은 장치의 온도, 압력, 장력 및 속도를 제어하기 위한 압력 및 온도 제어 모듈, PLC, 컨버터, 센서를 포함하는 복합 다공성막을 제조하는 장치. - 복합 다공성막의 제조 방법으로서,
제9항에 따른 장치에 의해 제조되고, 상기 제조방법은,
(a) β결정형의 형성을 촉진시킬 수 있는 조핵제를 포함하는 폴리프로필렌을 피더에 의해 스크류 압출기에 넣어 용융시키고, 용융물은 제1 용융 파이프를 통해 계량 펌프로 흐르며, 정확하게 계량된 후, 필터로 여과하여 제2 용융 파이프로 들어가는 단계;
(b) 단계(a)의 용융물은 다이 헤드를 통해 캐스팅 롤러 상에 캐스팅시며 고β결정의 필름을 형성하는 단계;
(c) 캐스팅 롤러에서 단계(b)의 고β결정의 필름을 박리하는 단계;
선택적으로, 제1 도포 시스템에 의해 코팅액을 필름의 일측 또는 양측 표면에 도포하고;
선택적으로, 고β결정의 필름은 필름 두께 측정기에 의해 모니터링되어, 비연신된 필름의 두께 또는 적어도 일측 표면에 코팅액이 도포된 비연신된 필름의 두께를 측정하며;
(d) 단계(c)의 비연신된 필름 또는 일측 또는 양측 표면에 코팅액이 도포된 비연신된 필름을 세로연신 시스템에 의해 세로연신된 필름을 얻는 단계;
(e) 제2 도포 시스템에 의해 코팅액을 단계(d)의 세로연신된 필름의 일측 또는 양측 표면에 도포하는 단계;
(f) 단계(e)의 필름을 가로연신 시스템에 의해 가로연신된 필름을 얻고, 제조하여 상기 복합 다공성막을 얻는 단계;를 포함하고,
상기 제조 방법은,
(g) 단계(f)의 복합 다공성막을 견인 롤링 시스템에 의해 롤링된 복합 다공성막을 얻는 단계;를 더 포함하며;
선택적으로, 견인 롤링 시스템 이전에, 박막 두께 측정기에 의해 복합 다공성막의 두께를 모니터링하는 것인, 복합 다공성막의 제조 방법.
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| CN201710744074.XA CN109422890A (zh) | 2017-08-25 | 2017-08-25 | 一种复合聚丙烯微孔膜及其制备方法和用途 |
| CN201810302163.3 | 2018-04-04 | ||
| CN201810302163 | 2018-04-04 | ||
| PCT/CN2018/102316 WO2019037785A1 (zh) | 2017-08-25 | 2018-08-24 | 一种复合多孔膜及其制备方法和用途 |
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| JP2020531323A (ja) | 2020-11-05 |
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| WO2019037785A1 (zh) | 2019-02-28 |
| EP3674354A4 (en) | 2021-07-28 |
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| US20200360866A1 (en) | 2020-11-19 |
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