JPS6411140A - Microporous polyolefin film and electrolyte separator composed thereof - Google Patents
Microporous polyolefin film and electrolyte separator composed thereofInfo
- Publication number
- JPS6411140A JPS6411140A JP16745687A JP16745687A JPS6411140A JP S6411140 A JPS6411140 A JP S6411140A JP 16745687 A JP16745687 A JP 16745687A JP 16745687 A JP16745687 A JP 16745687A JP S6411140 A JPS6411140 A JP S6411140A
- Authority
- JP
- Japan
- Prior art keywords
- film
- porosity
- surface layer
- roll
- electrolyte separator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
PURPOSE:To provide a microporous polyolefin film having an apparent porosity of the surface layer of the film smaller than the average porosity of the whole layer, having excellent retainability of electrolyte and high stability of electrical characteristics with time and suitable as an electrolyte separator. CONSTITUTION:A polyolefin polymer (preferably polyethylene or polypropylene) is compounded with an organic solid (e.g. phthalic acid ester). The mixture is extruded under melting, the organic solid is extracted with a solvent and the product is drawn with a roll. In the above roll-drawing process, the film is e.g. nipped on at least one of a low-speed roll or a high-speed roll to decrease the porosity of the surface layer. A microporous film having an apparent porosity of the surface layer of 10-45%, an average porosity of the film as a whole of 50-85%, a liquid paraffin permeation time of <=5sec and an average apparent pore diameter of the surface layer of preferably 0.01-4mum is produced by the above process. An electrolyte separator can be produced from the obtained microporous film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62167456A JPH0778145B2 (en) | 1987-07-04 | 1987-07-04 | Polyolefin microporous film and electrolytic solution separator comprising the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62167456A JPH0778145B2 (en) | 1987-07-04 | 1987-07-04 | Polyolefin microporous film and electrolytic solution separator comprising the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6411140A true JPS6411140A (en) | 1989-01-13 |
| JPH0778145B2 JPH0778145B2 (en) | 1995-08-23 |
Family
ID=15850020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62167456A Expired - Lifetime JPH0778145B2 (en) | 1987-07-04 | 1987-07-04 | Polyolefin microporous film and electrolytic solution separator comprising the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0778145B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112768764A (en) * | 2021-01-08 | 2021-05-07 | 上海恩捷新材料科技有限公司 | High-strength solid electrolyte membrane |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4864155A (en) * | 1971-11-30 | 1973-09-05 |
-
1987
- 1987-07-04 JP JP62167456A patent/JPH0778145B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4864155A (en) * | 1971-11-30 | 1973-09-05 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112768764A (en) * | 2021-01-08 | 2021-05-07 | 上海恩捷新材料科技有限公司 | High-strength solid electrolyte membrane |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0778145B2 (en) | 1995-08-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |