JPS54162766A - Porous film and its manufacture - Google Patents

Porous film and its manufacture

Info

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
Application number
JP7144878A
Other languages
Japanese (ja)
Other versions
JPS619138B2 (en
Inventor
Susumu Norota
Tadashi Imoto
Tsutomu Kiriyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Teijin Ltd
Original Assignee
Teijin Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Teijin Ltd filed Critical Teijin Ltd
Priority to JP7144878A priority Critical patent/JPS54162766A/en
Publication of JPS54162766A publication Critical patent/JPS54162766A/en
Publication of JPS619138B2 publication Critical patent/JPS619138B2/ja
Granted legal-status Critical Current

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
JP7144878A 1978-06-15 1978-06-15 Porous film and its manufacture Granted JPS54162766A (en)

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)

Also Published As

Publication number Publication date
JPS619138B2 (en) 1986-03-20

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