KR102161292B1 - 불소계 수지 다공성 막 및 그 제조방법 - Google Patents
불소계 수지 다공성 막 및 그 제조방법 Download PDFInfo
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Abstract
Description
도 2는 본 발명의 실시예 1 내지 3의 불소계 수지 다공성 막을 제조하기 위해 사용하는 PTFE 여과막의 전자현미경사진(SEM)을 나타낸 것이다((a), 1K배율, (b): 5K배율)
도 3은 비교예 1 내지 3 및 실시예 1 내지 3의 불소계 수지 다공성 막에 벤딩을 준 후의 곡률 반경을 나타낸 것이다.
도 4는 비교예 1 내지 3 및 실시예 1내지 3의 불소계 수지 다공성 막의 평균적인 곡률 반경 범위에 따른 수축율 추이를 비교하여 나타낸 것이다.
건조·경화 조건 | 초기 원단 |
Thickness, ㎛ | 207 |
Porosity, % | 67 |
Pore size mean/max, ㎚ | 315 / 664 |
Gurley, sec | ~ 50 |
내수압, ㎫ | 0.15 |
비교예 | 실시예 | |||||
구분 | 1 | 2 | 3 | 1 | 2 | 3 |
곡률 반경, ㎜ | 2 | 4 | 6 | 2 | 4 | 6 |
Size, ㎜ (MD Х TD) |
49.0Х50.0 | 49.5Х50.0 | 49.8Х50.0 | 49.5Х50.0 | 49.9Х50.0 | 50.0Х50.0 |
수축율, %(MD / TD) | 2 / 0 | 1 / 0 | 0.4 / 0 | 1 / 0 | 0.2 / 0 | 0 / 0 |
Bending 전후 통기도 Gurley, sec/100ml |
18→17 | 21→20 | 19→17 | 15→15 | 14→14 | 15→15 |
Claims (17)
- 내부에 기공이 형성된, 자유 수축을 거쳐 제공되는, 다공성 불소계 수지층; 및
상기 자유 수축을 거친 다공성 불소계 수지층의 적어도 일면과 상기 기공의 외면에 형성되고, 탄소수 1 내지 10의 퍼플루오로알킬아크릴레이트-탄소수 1 내지 10의 알킬아크릴레이트-염화비닐-가교성 단량체의 (공)중합체를 포함한 발수 및 발유성을 갖는 코팅층;을 포함하고,
2mm 이상의 곡률 반경 범위 내에서, 굴곡이 부여되는 벤딩 전후 하기 식 1로 표시되는 통기도 변화율이 1% 이하인 불소계 수지 다공성 막:
[식 1]
벤딩 전후 통기도 변화율(%) = [(Pa-Pb)/Pa]x100
식 1에서,
Pa는 벤딩을 부여하기 전에 측정된 불소계 다공성 막의 통기도 값이고,
Pb는 불소계 다공성 막에 대하여 "0.5㎏f의 장력이 가해진 상태로 4mm 내지 12mm의 직경(R)을 갖는 스테인리스 스틸 재질의 원통에 감아 30초간 유지 후, 상기 장력을 제거 후 다시 불소계 다공성 막을 펼치는 조건"으로 벤딩을 부여한 후 측정된 불소계 다공성 막의 통기도 값이며,
상기 통기도 값은 JIS P 8117의 표준에 따라 걸리(Gurley) 방식으로 측정된다.
- 제1항에 있어서, 상기 불소계 수지 다공석 막은 벤딩에 의한 전 방향 수축율이 하기 식 2로 표시되는 값의 범위 내에 포함되어 1% 이하가 되는 불소계 수지 다공성 막.
[식 2]
벤딩 수축율(Bending Shringage)(%) = 5 × exp [-0.8 × 곡률반경(mm)]
- 제2항에 있어서, 상기 불소계 수지 다공성 막은 벤딩을 부여했을 때, 곡률 반경이 2mm 내지 6mm인 범위내에서 세로방향(MD) 및 가로방향(TD)의 전 방향 수축율이 0% 내지 1%인 불소계 수지 다공성 막.
- 제2항에 있어서, 상기 벤딩에 의한 전 방향 수축율은 불소계 다공성 막에 곡률 반경 2mm 이상의 굴곡을 가한 후 측정되는 가로방향(TD)에 대한 세로방향(MD)의 비율인 불소계 수지 다공성 막.
- 제1항에 있어서,
상기 가교성 단량체는 히드록시기, 카복실기, 에폭시기, 이소시아네이트기 또는 우레탄, 아민, 아미드, 유레아 등의 질소 함유 관능기를 가지는 단량체인, 불소계 수지 다공성 막.
- 제1항에 있어서,
상기 다공성 불소계 수지 복합막의 어느 일면 및 나머지를 이루는 다른 한 면의 발유도(AATCC-118)는 각각 6등급 이상인, 불소계 수지 다공성 막.
- 제1항에 있어서,
상기 다공성 불소계 수지 복합막의 어느 일면 및 나머지를 이루는 다른 한 면의 발유도(AATCC-118)는 대칭성을 가지는, 불소계 수지 다공성 막.
- 제1항에 있어서, 기공도 40 내지 90%, 최대 기공 크기 300nm 내지 4000nm 및 0.10 내지 1.30 g/㎤의 밀도를 가지는 불소계 수지 다공성 막.
- 삭제
- 제1항에 있어서,
상기 불소계 수지층은 폴리테트라 플루오로에틸렌(PTFE), 테트라플루오로에틸렌-퍼플루오로알킬비닐에테르 공중합체(PFA), 테트라플루오르에틸렌-헥사플루오르프로필렌 공중합체(FEP), 에틸렌-테트라플루오로에틸렌 코폴리머 수지(ETFE), 테트라플루오로에틸렌- 클로로트리플루오로에틸렌 공중합체(TFE/CTFE) 및 에틸렌-클로로트리플루오로에틸렌 수지(ECTFE)로 이루어진 군에서 선택된 1종 이상의 불소계 화합물을 포함하는, 패치형인, 불소계 수지 다공성 막.
- 1축 연신된 다공성 불소계 수지층을 제조하는 단계;
상기 1축 연신된 다공성 불소계 수지층을 열고정하는 단계;
상기 열고정된 다공성 불소계 수지층을 적어도 150℃ 이상에서 자유수축하는 단계; 및
고형분 함량 2 내지 10중량%로 희석된 발수발유제 함유 용액에, 상기 자유수축된 다공성 불소계 수지층을 함침하고 건조하는 단계;를 포함하며,
상기 발수발유제는 탄소수 1 내지 10의 퍼플루오로알킬아크릴레이트-탄소수 1 내지 10의 알킬아크릴레이트-염화비닐-가교성 단량체의 (공)중합체를 포함하고,
상기 자유수축하는 단계는 열고정된 다공성 불소계 수지층에 대하여 150 내지 250℃에서 3분 내지 30분 동안 수행하는 단계를 포함하는,
제1항의 불소계 수지 다공성 막의 제조 방법.
- 삭제
- 제11항에 있어서, 상기 자유수축 단계 후에, 상온에서 3 내지 30분간 방치하는 단계를 더 포함하는 불소계 수지 다공성 막의 제조방법.
- 제11항에 있어서,
상기 열고정하는 단계는, 1축 연신된 다공성 불소계 수지층을 불소계 수지의 융점 이상의 온도 조건에서 3 내지 30초 동안 수행하는 불소계 수지 다공성 막의 제조방법.
- 제11항에 있어서, 상기 발수발유제 함유 용액은 물, 탄소수 4 내지 16의 알칸, 알코올, 카르복시산, 케톤, 에테르 및 탄소수 5내지 12의 불소계 알칸으로 이루어진 군에서 선택된 1종 이상의 용매를 포함하는 불소계 수지 다공성 막의 제조방법.
- 제 11항에 있어서, 상기 1축 연신된 다공성 불소계 수지층은
불소계 수지 및 윤활제를 포함하는 조성물을 이용하여 예비 성형체를 제조하는 단계; 및
상기 예비 성형체를 압출하고, 건조 및 세로방향(MD)으로 1축 연신하는 단계;
를 포함하는 방법으로 제공되는, 불소계 수지 다공성 막의 제조 방법.
- 제1항의 불소계 수지 다공성 막을 포함하는 자동차용 밴트 필터.
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TW107141825A TWI682956B (zh) | 2017-11-24 | 2018-11-23 | 多孔氟樹脂膜、其製備方法及汽車通風過濾器 |
EP18880548.5A EP3626335A4 (en) | 2017-11-24 | 2018-11-23 | POROUS FLUORINE-BASED RESIN FILM, AND CORRESPONDING MANUFACTURING PROCESS |
US16/628,601 US11344836B2 (en) | 2017-11-24 | 2018-11-23 | Porous fluorine resin film and preparation method thereof |
JP2019568367A JP6880467B2 (ja) | 2017-11-24 | 2018-11-23 | フッ素系樹脂多孔性膜、その製造方法及び自動車用ベントフィルター |
CN201880038177.7A CN110753577B (zh) | 2017-11-24 | 2018-11-23 | 多孔氟树脂膜及其制备方法 |
PCT/KR2018/014549 WO2019103537A1 (ko) | 2017-11-24 | 2018-11-23 | 불소계 수지 다공성 막 및 그 제조방법 |
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KR102770986B1 (ko) * | 2019-11-04 | 2025-02-19 | 주식회사 엘지화학 | 다공성 불소계 수지 복합체 및 이의 제조 방법 |
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