JP2004196870A5 - - Google Patents
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- JP2004196870A5 JP2004196870A5 JP2002364146A JP2002364146A JP2004196870A5 JP 2004196870 A5 JP2004196870 A5 JP 2004196870A5 JP 2002364146 A JP2002364146 A JP 2002364146A JP 2002364146 A JP2002364146 A JP 2002364146A JP 2004196870 A5 JP2004196870 A5 JP 2004196870A5
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- polyethylene
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Description
【特許請求の範囲】
【請求項1】 (a) ポリエチレン、及び
(b) 重量平均分子量が5×105以上であり、かつ走査型示差熱量計により測定される融解熱が90 J/g以上であるポリプロピレン
を含むことを特徴とするポリオレフィン微多孔膜。
【請求項2】 請求項1に記載のポリオレフィン微多孔膜において、前記ポリエチレンは、重量平均分子量5×10 5 以上のポリエチレンと、重量平均分子量1×10 4 以上〜5×10 5 未満のポリエチレン、重量平均分子量1×10 4 〜4×10 6 のポリブテン-1、重量平均分子量1×10 3 以上〜1×10 4 以下のポリエチレンワックス、及び重量平均分子量1×10 4 〜4×10 6 のエチレン・α-オレフィン共重合体からなる群から選ばれた少なくとも一種の他のポリオレフィンとからなるポリエチレン組成物、又は重量平均分子量5×10 5 以上の超高分子量ポリエチレンであることを特徴とするポリオレフィン微多孔膜。
【請求項3】 請求項1又は2に記載のポリオレフィン微多孔膜において、膜厚変動率は15%以下であることを特徴とするポリオレフィン微多孔膜。
【請求項4】 請求項1〜3のいずれかに記載のポリオレフィン微多孔膜において、膜厚16μm換算の透気度は20〜550秒/100 ccであり、空孔率は25〜80%であり、突刺強度は2450 mN/16μm以上であり、105℃・8時間暴露後の熱収縮率は機械方向及び垂直方向ともに5%以下であり、シャットダウン温度は120〜140℃であり、メルトダウン温度は165℃以上であることを特徴とするポリオレフィン微多孔膜。
【請求項5】 (a) ポリエチレンと、
(b) 重量平均分子量が5×105以上であり、かつ走査型示差熱量計により測定される融解熱が90 J/g以上であるポリプロピレンと、
(c) 溶剤
とを溶融混練し、得られた溶融混練物をダイより押出し、次いで冷却してゲル状シートとした後、前記ゲル状シートを延伸した後前記溶剤を除去するか、前記ゲル状シートから前記溶剤を除去した後延伸するか、又は前記ゲル状シートを延伸した後前記溶剤を除去しさらに延伸することを特徴とするポリオレフィン微多孔膜の製造方法。
【請求項6】 請求項1〜4のいずれかに記載のポリオレフィン微多孔膜からなることを特徴とする電池用セパレーター。
[Claims]
(1) polyethylene, and
(b) Weight average molecular weight is 5 × 10FivePolypropylene having a heat of fusion of at least 90 J / g as measured by a scanning differential calorimeter
A microporous polyolefin membrane comprising:
(2) The polyolefin microporous membrane according to claim 1, wherein the polyethylene has a weight average molecular weight of 5 × 10 5. Five More than polyethylene, weight average molecular weight 1 × 10 Four More than ~ 5 × 10 Five Less than polyethylene, weight average molecular weight 1 × 10 Four ~ 4 × 10 6 Polybutene-1, weight average molecular weight 1 × 10 Three More than 1 × 10 Four The following polyethylene wax, and weight average molecular weight 1 × 10 Four ~ 4 × 10 6 A polyethylene composition comprising at least one other polyolefin selected from the group consisting of ethylene / α-olefin copolymers, or a weight average molecular weight of 5 × 10 Five A polyolefin microporous membrane characterized by the above ultrahigh molecular weight polyethylene.
(3) 3. The microporous polyolefin membrane according to claim 1, wherein the rate of change in film thickness is 15% or less.
(4) The polyolefin microporous membrane according to any one of claims 1 to 3, wherein the air permeability in terms of a thickness of 16 µm is 20 to 550 seconds / 100 cc, the porosity is 25 to 80%, and the piercing strength is 2450 mN / 16μm or more, heat shrinkage after exposure to 105 ° C for 8 hours is 5% or less in both machine and vertical directions, shutdown temperature is 120-140 ° C, meltdown temperature is 165 ° C or more A microporous polyolefin membrane characterized by the following.
(5) a polyethylene;
(b) weight average molecular weight is 5 × 10FiveAnd polypropylene having a heat of fusion of 90 J / g or more as measured by a scanning differential calorimeter,
(c) Solvent
And the resulting melt-kneaded product is extruded from a die, then cooled to form a gel-like sheet, and the solvent is removed after stretching the gel-like sheet, or the solvent is removed from the gel-like sheet. The method for producing a microporous polyolefin membrane, comprising: removing the solvent and stretching the gel sheet; or stretching the gel sheet and then removing the solvent and stretching the gel sheet.
6. The method according to claim 1,Any of ~ 4A separator for a battery, comprising the microporous polyolefin membrane according to item 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002364146A JP4121846B2 (en) | 2002-12-16 | 2002-12-16 | Polyolefin microporous membrane and production method and use thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002364146A JP4121846B2 (en) | 2002-12-16 | 2002-12-16 | Polyolefin microporous membrane and production method and use thereof |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2004196870A JP2004196870A (en) | 2004-07-15 |
JP2004196870A5 true JP2004196870A5 (en) | 2006-01-19 |
JP4121846B2 JP4121846B2 (en) | 2008-07-23 |
Family
ID=32762098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2002364146A Expired - Lifetime JP4121846B2 (en) | 2002-12-16 | 2002-12-16 | Polyolefin microporous membrane and production method and use thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4121846B2 (en) |
Families Citing this family (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4925238B2 (en) * | 2004-08-17 | 2012-04-25 | 旭化成イーマテリアルズ株式会社 | Method for producing polyolefin microporous membrane |
TWI399280B (en) * | 2005-06-24 | 2013-06-21 | Process for polyolefine microporous film | |
EP1905586B1 (en) | 2005-07-15 | 2013-09-25 | Toray Battery Separator Film Co., Ltd. | Polyolefin multilayer microporous membrane and battery separator |
CN101238170B (en) | 2005-08-03 | 2011-07-13 | 旭化成电子材料株式会社 | Polyolefin microporous film |
CA2627811A1 (en) | 2005-11-01 | 2007-05-10 | Tonen Chemical Corporation | Polyolefin microporous membrane, separator for battery using the membrane, and battery |
CN101313016B (en) | 2005-11-24 | 2011-09-28 | 东丽东燃机能膜合同会社 | Polyolefin microporous film and its manufacture method, and spacer for battery and battery |
CA2630251C (en) | 2005-11-24 | 2014-01-14 | Tonen Chemical Corporation | Microporous polyolefin membrane, its production method, battery separator and battery |
US7700182B2 (en) | 2006-05-15 | 2010-04-20 | Tonen Chemical Corporation | Microporous polyolefin membrane, its production method, and battery separator |
US20070264578A1 (en) | 2006-05-15 | 2007-11-15 | Tonen Chemical Corporation | Microporous polyolefin membrane, its production method and battery separator |
US7981536B2 (en) * | 2006-08-31 | 2011-07-19 | Toray Tonen Specialty Separator Godo Kaisha | Microporous membrane, battery separator and battery |
US7807287B2 (en) * | 2006-08-31 | 2010-10-05 | Tonen Chemical Corporation | Multi-layer, microporous membrane, battery separator and battery |
JP5453272B2 (en) * | 2007-09-20 | 2014-03-26 | 東レバッテリーセパレータフィルム株式会社 | Microporous membranes and methods of making and using such membranes |
TWI367229B (en) | 2007-10-05 | 2012-07-01 | Toray Tonen Specialty Separato | Microporous polymer membrane |
WO2009044227A1 (en) * | 2007-10-05 | 2009-04-09 | Tonen Chemical Corporation | Microporous polymer membrane |
EP2212944B1 (en) * | 2007-10-12 | 2014-06-04 | Toray Battery Separator Film Co., Ltd. | Microporous membranes and methods for making and using such membranes |
US8338017B2 (en) | 2007-10-12 | 2012-12-25 | Toray Battery Separator Film Co., Ltd. | Microporous membrane and manufacturing method |
WO2009064297A1 (en) * | 2007-11-14 | 2009-05-22 | Tonen Chemical Corporation | Multi-layer, microporous membrane, battery separator and battery |
WO2009064296A1 (en) * | 2007-11-14 | 2009-05-22 | Tonen Chemical Corporation | Multi-layer, microporous membrane, battery separator formed by such a membrane and battery comprising such a separator |
US8012622B2 (en) | 2007-11-14 | 2011-09-06 | Toray Tonen Specialty Separator Godo Kaisha | Multi-layer, microporous membrane, battery separator and battery |
US8507124B2 (en) | 2007-11-14 | 2013-08-13 | Toray Battery Separator Film Co., Ltd. | Multi-layer, microporous membrane, battery separator and battery |
JP4940351B2 (en) * | 2007-11-30 | 2012-05-30 | 東レバッテリーセパレータフィルム合同会社 | Microporous film, production method thereof, and use thereof |
JP5213768B2 (en) * | 2008-04-02 | 2013-06-19 | 旭化成イーマテリアルズ株式会社 | Polyolefin microporous membrane |
WO2010058789A1 (en) | 2008-11-19 | 2010-05-27 | 三井化学株式会社 | Polyolefin resin composition and applications thereof |
CN102355938B (en) * | 2009-03-30 | 2014-09-10 | 东丽电池隔膜株式会社 | Microporous membranes and methods for producing and using such membranes |
EP2487198A4 (en) | 2009-10-07 | 2013-05-01 | Toray Industries | Porous polypropylene film roll |
JP2013522379A (en) * | 2010-03-15 | 2013-06-13 | 東レバッテリーセパレータフィルム株式会社 | Microporous membranes, methods for making these membranes, and use of these membranes as battery separator films |
US20110223485A1 (en) * | 2010-03-15 | 2011-09-15 | Toray Tonen Specialty Separator Godo Kaisha | Microporous membranes, methods for making these membranes, and the use of these membranes as battery separator films |
JP5926619B2 (en) * | 2012-06-01 | 2016-05-25 | 三菱製紙株式会社 | Coating liquid for lithium ion battery separator and method for producing lithium ion battery separator |
CN103657439B (en) * | 2012-09-07 | 2016-03-30 | 中国石油化工股份有限公司 | A kind of polypropylene hollow fiber separation membrane and preparation method thereof |
JP5296917B1 (en) | 2012-11-16 | 2013-09-25 | 東レバッテリーセパレータフィルム株式会社 | Battery separator |
KR102294981B1 (en) | 2014-04-30 | 2021-08-26 | 도레이 카부시키가이샤 | Microporous polyolefin membrane |
KR102064867B1 (en) | 2017-11-23 | 2020-01-10 | 더블유스코프코리아 주식회사 | A porous separator and a method for manufacturing the same |
CN109054149A (en) * | 2018-06-29 | 2018-12-21 | 怀宁县日升塑业有限公司 | A kind of preparation method of tear-resistant polybag |
JP2021091896A (en) * | 2019-12-10 | 2021-06-17 | 旭化成株式会社 | Polyethylene resin composition |
-
2002
- 2002-12-16 JP JP2002364146A patent/JP4121846B2/en not_active Expired - Lifetime
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