JPS54162766A - Porous film and its manufacture - Google Patents
Porous film and its manufactureInfo
- Publication number
- JPS54162766A JPS54162766A JP7144878A JP7144878A JPS54162766A JP S54162766 A JPS54162766 A JP S54162766A JP 7144878 A JP7144878 A JP 7144878A JP 7144878 A JP7144878 A JP 7144878A JP S54162766 A JPS54162766 A JP S54162766A
- Authority
- JP
- Japan
- Prior art keywords
- fibrous
- polymer
- heat
- apparent density
- consisting mainly
- 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
- Nonwoven Fabrics (AREA)
- Filtering Materials (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
PURPOSE: To obtain the title film having non-linear through-holes with very long cavities readily, by heat-treating a multi-layer laminate of fibrous webs consisting mainly of a thermoplastic fibrous polymer under specific conditions to increase the apparent density.
CONSTITUTION: At least five layers of fibrous webs consisting mainly of a thermoplastic fibrous polymer are laminated and heat-treated with both edges held and out of contact with other materials to melt at least 50 wt.% of the polymer. The resulting laminate has an apparent density of 0.40W0.99, a filmy appearance without fibrous shape, a structure very similar to that of the skin of a living tissue, etc., and ideal functions to separate and permeate substances of the order of microns.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7144878A JPS54162766A (en) | 1978-06-15 | 1978-06-15 | Porous film and its manufacture |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7144878A JPS54162766A (en) | 1978-06-15 | 1978-06-15 | Porous film and its manufacture |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54162766A true JPS54162766A (en) | 1979-12-24 |
JPS619138B2 JPS619138B2 (en) | 1986-03-20 |
Family
ID=13460837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7144878A Granted JPS54162766A (en) | 1978-06-15 | 1978-06-15 | Porous film and its manufacture |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54162766A (en) |
-
1978
- 1978-06-15 JP JP7144878A patent/JPS54162766A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS619138B2 (en) | 1986-03-20 |
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