GB1476791A - Process for producing porous polymer film - Google Patents

Process for producing porous polymer film

Info

Publication number
GB1476791A
GB1476791A GB2548974A GB2548974A GB1476791A GB 1476791 A GB1476791 A GB 1476791A GB 2548974 A GB2548974 A GB 2548974A GB 2548974 A GB2548974 A GB 2548974A GB 1476791 A GB1476791 A GB 1476791A
Authority
GB
United Kingdom
Prior art keywords
voids
temperature
stretching
polymer composition
porous 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
GB2548974A
Other languages
English (en)
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
Publication of GB1476791A publication Critical patent/GB1476791A/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)
GB2548974A 1973-06-11 1974-06-07 Process for producing porous polymer film Expired GB1476791A (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
GB1476791A true GB1476791A (en) 1977-06-16

Family

ID=26351996

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2548974A Expired GB1476791A (en) 1973-06-11 1974-06-07 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4452845A (en) * 1980-08-13 1984-06-05 Smith And Nephew Associated Companies Limited Moisture vapor transmitting film of polyurethane blended with an incompatible polymer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4452845A (en) * 1980-08-13 1984-06-05 Smith And Nephew Associated Companies Limited Moisture vapor transmitting film of polyurethane blended with an incompatible polymer

Also Published As

Publication number Publication date
FR2232430A1 (enExample) 1975-01-03
DE2427862A1 (de) 1975-01-02
CA1044419A (en) 1978-12-19
FR2232430B1 (enExample) 1978-02-17

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19940606