JP5320464B2 - 微多孔膜ならびにかかる膜の製造および使用方法 - Google Patents
微多孔膜ならびにかかる膜の製造および使用方法 Download PDFInfo
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- JP5320464B2 JP5320464B2 JP2011520256A JP2011520256A JP5320464B2 JP 5320464 B2 JP5320464 B2 JP 5320464B2 JP 2011520256 A JP2011520256 A JP 2011520256A JP 2011520256 A JP2011520256 A JP 2011520256A JP 5320464 B2 JP5320464 B2 JP 5320464B2
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- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. 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
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- 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
- B29K2105/25—Solid
- B29K2105/253—Preform
- B29K2105/256—Sheets, plates, blanks or films
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- 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0094—Geometrical properties
- B29K2995/0097—Thickness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3468—Batteries, accumulators or fuel cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/755—Membranes, diaphragms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- 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
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
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Description
本出願は、2008年11月17日出願の米国仮特許出願番号第61/115405号、2008年11月17日出願の米国仮特許出願番号第61/115410号、2009年1月26日出願の欧州特許出願第09151320.0号および2009年1月26日出願の欧州特許出願第09151318.4号の優先権を主張し、それぞれの内容は参照によりその全体が組み入れられたものとする。
(a)希釈剤およびMw>1.0×106のポリオレフィンを含む押出物をMDまたはTDの少なくとも1つの方向に延伸し、次いで延伸押出物から希釈剤の少なくとも一部を除去して、MDに沿った第1の長さおよびTDに沿った第1の幅を有する膜を形成し、
(b)膜を、MDに第1の長さから、約1.1〜約1.5の範囲の倍率で第1の長さより長い第2の長さへ延伸し、かつ、TDに第1の幅から、約1.1〜約1.3の範囲の倍率で第1の幅より広い第2の幅へ延伸し、次いで
(c)第2の幅を、第1の幅から第1の幅の約1.1倍までの範囲である、第3の幅に縮小させる工程、
を含む微多孔膜の製造方法に関する。
[1]微多孔膜の組成および構造
[2]微多孔膜の製造に用いる材料
A.第1のポリエチレン
B.第2のポリエチレン
C.ポリプロピレン
[3]微多孔膜の製造方法
ポリマーと希釈剤との混合
押出し
冷却押出物の形成
押出物の延伸
希釈剤の除去
膜の延伸(乾燥延伸)
(i)MD延伸は、膜を、例えば70.0℃〜約125.0℃、または約80.0℃〜約120.0℃といった、Tcd−30.0℃〜およそTm−10.0℃の範囲の第1の温度にさらしながら行い、
(ii)TD延伸は、膜を、例えば約70.0℃〜約135.0℃、約127.0℃〜約132.0℃または約129.0℃〜約131.0℃といった第1の温度より高いがTmよりは低い第2の温度にさらしながら行う。
膜幅の制御された縮小
任意の熱処理
[4]微多孔膜の構造、特性、および組成
(a)正規化透気度≦4.0×102秒/100cm3/20μm
(b)約25.0%〜約80.0%の範囲の空孔率
(c)正規化突刺強度≧3.0×103mN/20μm
(d)引張強さ≧4.0×104kPa
(e)100%以上の引張伸度
(f)熱圧縮後の厚さ変動率≦20%
(g)熱圧縮後の透気度≦7.0×102秒/100cm3
(h)シャットダウン温度≦140.0℃
(i)電解液吸収速度≧2.5
(j)105℃におけるTD熱収縮率≦2.5%
(i)微多孔膜の試験片の大きさを、室温にてMDおよびTDの両方向について測定し、(ii)この試験片を、荷重をかけずに、8時間105℃の温度にさらし、次いで(iii)膜の大きさをMDおよびTDの両方向について測定する。MDまたはTDのどちらの方向の熱(すなわち「熱による」)収縮率も、測定結果(i)を測定結果(ii)で割り、得られた商を百分率で表すことによって得ることができる。
(k)130℃におけるTD熱収縮率≦15%
(l)溶融状態における最大TD収縮率≦10.0%
(m)メルトダウン温度≧145℃
微多孔膜の組成
ポリマー
[5]電池
実施例1
実施例2
実施例3
実施例4
実施例5
実施例6
実施例7
実施例8
比較例1
比較例2
比較例3
比較例4
比較例5
比較例6
比較例7
特性
Claims (14)
- Mw>1.0×106のポリオレフィンを含む単層微多孔膜であって、正規化透気度が4.0×102秒/100cm3/20μm以下、平面方向がTDであり、少なくとも1つの平面方向への105℃における熱収縮率が2.5%以下であり、および、少なくとも1つの平面方向への130℃における熱収縮率が15%以下である単層微多孔膜。
- Mw>1.0×106のポリオレフィンを含む単層微多孔膜であって、正規化透気度が4.0×102秒/100cm3/20μm以下、少なくとも1つの平面方向への溶融状態における最大収縮率が10.0%以下であり、および、少なくとも1つの平面方向への130℃における熱収縮率が15%以下である単層微多孔膜。
- ポリオレフィンが、(a)第1のポリエチレンを含み、かつ(b)Mw>1.0×106のポリプロピレンまたは(c)Mw>1.0×106の第2のポリエチレンの少なくとも1つをさらに含み、第1のポリエチレンが1.0×105〜9.0×105の範囲のMwおよび3.0〜15の範囲のMWDを有し、第2のポリエチレンが1.1×106〜5.0×106の範囲のMwおよび4.0〜20.0の範囲のMWDを有し、ポリプロピレンが1.05×106〜2.0×106の範囲のMw、2.0〜6.0の範囲のMWDおよび100.0J/g以上のΔHmを有する請求項1または2に記載の微多孔膜。
- 膜が、(1)1.0μm〜50.0μmの範囲の厚さ、(2)25.0%〜80.0%の範囲の空孔率、(3)3.0×103mN/20μm以上の正規化突刺強度、(4)4.0×104kPa以上の引張強さ、(5)100%以上のTD引張伸度、(6)145℃以上のメルトダウン温度、(7)140.0℃以下のシャットダウン温度、(8)20%以下の熱圧縮後厚さ変動、(9)7.0×102秒/100cm3以下の熱圧縮後透気度、または(10)0.25%〜1.5%の範囲の105℃におけるTD熱収縮率、の1以上を有する請求項1〜3のいずれかに記載の微多孔膜。
- Mw>1.0×106のポリオレフィンを含む単層微多孔膜であって、正規化透気度が4.0×102秒/100cm3/20μm以下、および、少なくとも1つの平面方向への130℃における熱収縮率が15%以下であり、ポリオレフィンが、(a)1.0重量%〜50.0重量%のポリプロピレン、(b)25.0重量%〜99.0重量%の第1のポリエチレンおよび(c)0.0重量%〜50.0重量%の第2のポリエチレンを含む単層微多孔膜。
- 膜が、(1)1.0μm〜50.0μmの範囲の厚さ、(2)25%〜80.0%の範囲の空孔率、(3)3.5×103mN/20μm以上の正規化突刺強度、(4)4.0×104kPa以上の引張強さ、(5)100%以上の引張伸度、(6)170.0℃以上のメルトダウン温度、(7)140.0℃以下のシャットダウン温度、(8)20%以下の熱圧縮後厚さ変動、(9)7.0×102秒/100cm3以下の熱圧縮後透気度、または(10)1.0%〜2.3%の範囲の105℃におけるTD熱収縮率、の1以上を有する請求項5に記載の微多孔膜。
- 微多孔膜の製造方法であって、
(a)希釈剤およびMw>1.0×106のポリオレフィンを含む押出物をMDまたはTDの少なくとも1つの方向に延伸し、次いで、希釈剤の少なくとも一部を延伸押出物から除去して、MDに沿った第1の長さおよびTDに沿った第1の幅を有する膜を形成すること、
(b)膜を、MDに第1の長さから、約1.1〜約1.5の範囲の第1の倍率で第1の長さより長い第2の長さへ延伸し、かつ、TDに第1の幅から、約1.1〜約1.3の範囲の第2の倍率で第1の幅より広い第2の幅へ延伸すること、次いで、
(c)第2の幅を、第1の幅から第1の幅の約1.1倍までの範囲である第3の幅に縮小させる工程、
を含む微多孔膜の製造方法。 - 工程(b)および/または(c)に続いて膜を熱処理することをさらに含む請求項7に記載の方法。
- 工程(b)中、MD延伸がTD延伸の前に行われ、第1の倍率が第2の倍率より大きく、
(i)MD延伸は、膜をTcd−30℃〜およそTm−10℃の範囲の第1の温度にさらして行われ、
(ii)TD延伸は、膜を第1の温度より高いが、Tmよりは低い第2の温度にさらして行われ、
工程(c)の縮小が、膜を第2の温度以上の温度にさらして行われる請求項7または8に記載の方法。 - ポリオレフィンが、(a)第1のポリエチレンを含み、かつ(b)Mw>1.0×106のポリプロピレンまたは(c)Mw>1.0×106の第2のポリエチレンの少なくとも1つをさらに含み、第2のポリエチレンが1.1×106〜約5.0×106の範囲のMwおよび4.0〜20.0の範囲のMWDを有し、第1のポリエチレンが1.0×105〜9.0×105の範囲のMwおよび3.0〜15.0の範囲のMWDを有し、ポリプロピレンが1.05×106〜2.0×106の範囲のMw、2.0〜6.0の範囲のMWDおよび100.0J/g以上のΔHmを有する請求項7〜9のいずれかに記載の方法。
- ポリオレフィンが、(a)1.0重量%〜50.0重量%のポリプロピレン、(b)25.0重量%〜99.0重量%の第1のポリエチレンおよび(c)0.0重量%〜50.0重量%の第2のポリエチレンを含む請求項7〜10のいずれかに記載の方法。
- 負極、正極、電解質、および請求項1〜6に記載の微多孔膜を含む電池であって、少なくとも負極と正極が該微多孔膜によって隔てられている電池。
- 電解質がリチウムイオンを含み、電池が二次電池である、請求項12に記載の電池。
- 電池が、電気自動車またはハイブリッド電気自動車用の電源である、請求項12または13に記載の電池。
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US20110274961A1 (en) | 2011-11-10 |
KR101683555B1 (ko) | 2016-12-07 |
WO2010055834A1 (en) | 2010-05-20 |
KR20110095268A (ko) | 2011-08-24 |
JP5627583B2 (ja) | 2014-11-19 |
JP2012508946A (ja) | 2012-04-12 |
CN102215945A (zh) | 2011-10-12 |
CN105964150B (zh) | 2019-05-28 |
US20140332998A1 (en) | 2014-11-13 |
CN102215945B (zh) | 2014-10-22 |
CN105964150A (zh) | 2016-09-28 |
JP2012508795A (ja) | 2012-04-12 |
WO2010055812A1 (en) | 2010-05-20 |
US9647253B2 (en) | 2017-05-09 |
US20110236764A1 (en) | 2011-09-29 |
KR101640777B1 (ko) | 2016-07-19 |
KR20110089278A (ko) | 2011-08-05 |
CN102215944A (zh) | 2011-10-12 |
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