CA1044419A - Process for producing porous polymer film - Google Patents

Process for producing porous polymer film

Info

Publication number
CA1044419A
CA1044419A CA202,085A CA202085A CA1044419A CA 1044419 A CA1044419 A CA 1044419A CA 202085 A CA202085 A CA 202085A CA 1044419 A CA1044419 A CA 1044419A
Authority
CA
Canada
Prior art keywords
stretching
polymer composition
cracks
composition
polymer
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.)
Expired
Application number
CA202,085A
Other languages
English (en)
French (fr)
Inventor
Takashi Suzuki
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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
Priority claimed from JP6666073A external-priority patent/JPS5018574A/ja
Priority claimed from JP1578974A external-priority patent/JPS5628931B2/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Application granted granted Critical
Publication of CA1044419A publication Critical patent/CA1044419A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
CA202,085A 1973-06-11 1974-06-10 Process for producing porous polymer film Expired CA1044419A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6666073A JPS5018574A (enExample) 1973-06-11 1973-06-11
JP1578974A JPS5628931B2 (enExample) 1974-02-06 1974-02-06

Publications (1)

Publication Number Publication Date
CA1044419A true CA1044419A (en) 1978-12-19

Family

ID=26351996

Family Applications (1)

Application Number Title Priority Date Filing Date
CA202,085A Expired CA1044419A (en) 1973-06-11 1974-06-10 Process for producing porous polymer film

Country Status (4)

Country Link
CA (1) CA1044419A (enExample)
DE (1) DE2427862A1 (enExample)
FR (1) FR2232430B1 (enExample)
GB (1) GB1476791A (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE51473B1 (en) * 1980-08-13 1986-12-24 Smith & Nephew Ass Polymer blend films,their preparation and use
US4511520A (en) * 1982-07-28 1985-04-16 American Can Company Method of making perforated films

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE758820A (fr) * 1969-11-13 1971-05-12 Celanese Corp Procede de production de pellicules microporeuses a cellules ouvertes

Also Published As

Publication number Publication date
GB1476791A (en) 1977-06-16
FR2232430A1 (enExample) 1975-01-03
DE2427862A1 (de) 1975-01-02
FR2232430B1 (enExample) 1978-02-17

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