JP2004196871A5 - - Google Patents
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- JP2004196871A5 JP2004196871A5 JP2002364147A JP2002364147A JP2004196871A5 JP 2004196871 A5 JP2004196871 A5 JP 2004196871A5 JP 2002364147 A JP2002364147 A JP 2002364147A JP 2002364147 A JP2002364147 A JP 2002364147A JP 2004196871 A5 JP2004196871 A5 JP 2004196871A5
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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3〜20℃/minの昇温速度で測定される融点が163℃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3〜20 ℃/minの昇温速度で測定される融点が163 ℃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 melting point of 163 ° C. or higher as measured by a scanning differential calorimeter at a rate of 3 to 20 ° C./min.
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 × 10FiveA polypropylene having a melting point of 163 ° C. or higher as measured by a scanning differential calorimeter at a heating rate of 3 to 20 ° C./min;
(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 |
---|---|---|---|
JP2002364147A JP4195810B2 (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 |
---|---|---|---|
JP2002364147A JP4195810B2 (en) | 2002-12-16 | 2002-12-16 | Polyolefin microporous membrane and production method and use thereof |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2004196871A JP2004196871A (en) | 2004-07-15 |
JP2004196871A5 true JP2004196871A5 (en) | 2006-01-19 |
JP4195810B2 JP4195810B2 (en) | 2008-12-17 |
Family
ID=32762099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2002364147A Expired - Lifetime JP4195810B2 (en) | 2002-12-16 | 2002-12-16 | Polyolefin microporous membrane and production method and use thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4195810B2 (en) |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004303475A (en) * | 2003-03-28 | 2004-10-28 | Sanyo Electric Co Ltd | Nonaqueous electrolyte battery |
US7332531B2 (en) | 2004-06-11 | 2008-02-19 | Sk Corporation | Microporous high density polyethylene film |
US7435761B2 (en) | 2004-07-06 | 2008-10-14 | Sk Energy Co., Ltd. | Microporous polyethylene film and method of producing the same |
KR100943697B1 (en) | 2005-04-06 | 2010-02-23 | 에스케이에너지 주식회사 | Microporous polyethylene film having excellent physical properties, productivity and quality consistency, and method for preparing the same |
KR100943234B1 (en) | 2005-05-16 | 2010-02-18 | 에스케이에너지 주식회사 | Microporous polyethylene film through liquid-liquid phase separation mechanism and preparing method thereof |
KR100943235B1 (en) * | 2005-05-16 | 2010-02-18 | 에스케이에너지 주식회사 | Microporous high density polyethylene film and preparing method thereof |
KR101354542B1 (en) * | 2005-06-24 | 2014-01-22 | 도레이 배터리 세퍼레이터 필름 주식회사 | Method for producing polyolefin microporous membrane |
EP1905586B1 (en) | 2005-07-15 | 2013-09-25 | Toray Battery Separator Film Co., Ltd. | Polyolefin multilayer microporous membrane and battery separator |
KR100899066B1 (en) | 2005-08-03 | 2009-05-25 | 아사히 가세이 케미칼즈 가부시키가이샤 | Polyolefin Microporous Film |
KR101389780B1 (en) | 2005-11-01 | 2014-04-29 | 도레이 배터리 세퍼레이터 필름 주식회사 | Polyolefin microporous membrane, separator for battery using the membrane, and battery |
US20090042008A1 (en) | 2005-11-24 | 2009-02-12 | Tonen Chemical Corporation | Microporous polyolefin membrane, its production method, battery separator and battery |
CN101313018A (en) | 2005-11-24 | 2008-11-26 | 东燃化学株式会社 | Polyolefin microporous film and its manufacture method, and spacer for battery and battery |
KR100961660B1 (en) * | 2005-12-21 | 2010-06-09 | 에스케이에너지 주식회사 | Microporous film of semicrystalline polymer and method for preparing the same |
JP2007188776A (en) * | 2006-01-13 | 2007-07-26 | Sony Corp | Nonaqueous electrolytic solution battery |
KR100943236B1 (en) * | 2006-02-14 | 2010-02-18 | 에스케이에너지 주식회사 | Microporous polyolefin film with improved meltdown property and preparing method thereof |
US20070264578A1 (en) | 2006-05-15 | 2007-11-15 | Tonen Chemical Corporation | Microporous polyolefin membrane, its production method and battery separator |
US7700182B2 (en) | 2006-05-15 | 2010-04-20 | Tonen Chemical Corporation | Microporous polyolefin membrane, its production method, and battery separator |
US7807287B2 (en) | 2006-08-31 | 2010-10-05 | Tonen Chemical Corporation | Multi-layer, microporous membrane, battery separator and battery |
US7981536B2 (en) | 2006-08-31 | 2011-07-19 | Toray Tonen Specialty Separator Godo Kaisha | Microporous membrane, battery separator and battery |
WO2009028737A1 (en) * | 2007-08-31 | 2009-03-05 | Tonen Chemical Corporation | Microporous polyolefin membrane, its production method, battery separator and battery |
US8338017B2 (en) | 2007-10-12 | 2012-12-25 | Toray Battery Separator Film Co., Ltd. | Microporous membrane and manufacturing method |
JP5320464B2 (en) * | 2008-11-17 | 2013-10-23 | 東レバッテリーセパレータフィルム株式会社 | Microporous membranes and methods for making and using such membranes |
JP5653761B2 (en) | 2009-01-07 | 2015-01-14 | 株式会社プライムポリマー | Polypropylene resin composition for forming microporous film |
WO2010079784A1 (en) | 2009-01-07 | 2010-07-15 | 三井化学株式会社 | Polypropylene resin composition for microporous film formation |
KR101700007B1 (en) * | 2010-08-18 | 2017-01-26 | 세키스이가가쿠 고교가부시키가이샤 | Propylene resin micropore film, battery separator, battery and method of manufacturing propylene resin micropore film |
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 |
RU2711547C1 (en) * | 2018-12-29 | 2020-01-17 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Московский государственный университет имени М.В. Ломоносова" (МГУ) | Method of producing mesoporous mechanically sensitive polymer materials |
WO2021033733A1 (en) * | 2019-08-22 | 2021-02-25 | 東レ株式会社 | Polyolefin micro porous film, laminate, and battery |
CN114269817A (en) * | 2019-08-22 | 2022-04-01 | 东丽株式会社 | Polyolefin microporous membrane, laminate, and battery |
EP4001348A1 (en) * | 2020-11-20 | 2022-05-25 | Toray Industries, Inc. | Polyolefin microporous membrane, battery separator, and secondary battery |
-
2002
- 2002-12-16 JP JP2002364147A patent/JP4195810B2/en not_active Expired - Lifetime
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