GB1521579A - Process for stretching a thermoplastic material - Google Patents

Process for stretching a thermoplastic material

Info

Publication number
GB1521579A
GB1521579A GB3834876A GB3834876A GB1521579A GB 1521579 A GB1521579 A GB 1521579A GB 3834876 A GB3834876 A GB 3834876A GB 3834876 A GB3834876 A GB 3834876A GB 1521579 A GB1521579 A GB 1521579A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
film
rollers
velocity
stretched
incompatible
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
GB3834876A
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.)
Biax Fiberfilm Corp
Original Assignee
Biax Fiberfilm Corp
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

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/18Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets by squeezing between surfaces, e.g. rollers

Abstract

1521579 Stretching film BIAX-FIBERFILM CORP 16 Sept 1976 [17 Sept 1975] 38348/76 Heading B5B A thermoplastic orientable polymer or a blend of a thermoplastic orientable polymer with an incompatible second phase which is an incompatible polymer or inorganic material or polymer matrix having an inorganic filler is longitudinally or biaxially stretched by feeding the film into a nip of interdigitating rollers having grooves parallel to the axis of the rollers; controlling the velocity of introduction of the film into the said nip to maintain a velocity identical to the rotational velocity of the rollers so as, thereby, to stretch longitudinally incremental portions of the film and withdrawing the film from the rollers at a velocity greater than the rotational velocity of the rollers. The longitudinally stretched film may similarly be transversely stretched. The stretched film may cut into strips and subjected to agitation to form fibres or the film may be contacted with a selective solvent to dissolve the incompatible phase or inert filler to give a porous sheet. Preferred thermoplastic materials are polypropylene optionally containing a clay and polyethylene terephthalate mixed with polystyrene which is subsequently removed by boiling toluene.
GB3834876A 1975-03-31 1976-09-16 Process for stretching a thermoplastic material Expired GB1521579A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05614018 US4116892A (en) 1975-03-31 1975-09-17 Process for stretching incremental portions of an orientable thermoplastic substrate and product thereof

Publications (1)

Publication Number Publication Date
GB1521579A true true GB1521579A (en) 1978-08-16

Family

ID=24459568

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3834876A Expired GB1521579A (en) 1975-03-31 1976-09-16 Process for stretching a thermoplastic material

Country Status (4)

Country Link
JP (1) JPS5236166A (en)
CA (1) CA1096117A (en)
DE (1) DE2641533A1 (en)
GB (1) GB1521579A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2164603A (en) * 1984-09-24 1986-03-26 Nat Res Dev Oriented polymer films
US5078931A (en) * 1986-11-17 1992-01-07 Mitsui Toatsu Chemicals, Inc. Gas-permeable, waterproof film and process for its production
WO2009130032A1 (en) * 2008-04-24 2009-10-29 Saudi Basic Industries Corporation Flexible intermediate bulk container
US7651653B2 (en) 2004-12-22 2010-01-26 Kimberly-Clark Worldwide, Inc. Machine and cross-machine direction elastic materials and methods of making same
US7932196B2 (en) 2003-08-22 2011-04-26 Kimberly-Clark Worldwide, Inc. Microporous stretch thinned film/nonwoven laminates and limited use or disposable product applications
WO2014140380A1 (en) * 2013-03-15 2014-09-18 Ole-Bendt Rasmussen A method of manufacturing a strainable thermoplastic film material, product resulting therefrom, and apparatus to carry out the method
US9556540B2 (en) 2008-04-24 2017-01-31 Saudi Basic Industries Corporation Process for making opaque polyester film

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1123566A (en) * 1977-02-09 1982-05-18 Eckhard C.A. Schwarz Process and apparatus for stretching a tubularly-formed sheet of a thermoplastic material and the product produced thereby
US6383431B1 (en) * 1997-04-04 2002-05-07 The Procter & Gamble Company Method of modifying a nonwoven fibrous web for use as component of a disposable absorbent article
JP4869636B2 (en) * 2005-06-07 2012-02-08 株式会社イノアックコーポレーション Method and apparatus for manufacturing a resin foam

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2164603A (en) * 1984-09-24 1986-03-26 Nat Res Dev Oriented polymer films
US5078931A (en) * 1986-11-17 1992-01-07 Mitsui Toatsu Chemicals, Inc. Gas-permeable, waterproof film and process for its production
US7932196B2 (en) 2003-08-22 2011-04-26 Kimberly-Clark Worldwide, Inc. Microporous stretch thinned film/nonwoven laminates and limited use or disposable product applications
US7651653B2 (en) 2004-12-22 2010-01-26 Kimberly-Clark Worldwide, Inc. Machine and cross-machine direction elastic materials and methods of making same
WO2009130032A1 (en) * 2008-04-24 2009-10-29 Saudi Basic Industries Corporation Flexible intermediate bulk container
US8349422B2 (en) 2008-04-24 2013-01-08 Saudi Basic Industries Corporation Flexible intermediate bulk container
US9556540B2 (en) 2008-04-24 2017-01-31 Saudi Basic Industries Corporation Process for making opaque polyester film
WO2014140380A1 (en) * 2013-03-15 2014-09-18 Ole-Bendt Rasmussen A method of manufacturing a strainable thermoplastic film material, product resulting therefrom, and apparatus to carry out the method

Also Published As

Publication number Publication date Type
DE2641533A1 (en) 1977-03-31 application
CA1096117A1 (en) grant
JPS5236166A (en) 1977-03-19 application
CA1096117A (en) 1981-02-24 grant

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee