GB1181786A - Process for making Flat Oriented Film of Polymeric Material - Google Patents

Process for making Flat Oriented Film of Polymeric Material

Info

Publication number
GB1181786A
GB1181786A GB1988766A GB1988766A GB1181786A GB 1181786 A GB1181786 A GB 1181786A GB 1988766 A GB1988766 A GB 1988766A GB 1988766 A GB1988766 A GB 1988766A GB 1181786 A GB1181786 A GB 1181786A
Authority
GB
United Kingdom
Prior art keywords
film
margins
heated
temperature
heating
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
GB1988766A
Inventor
Felix Frederick De Smedt
Victor Alois Marinus
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.)
Agfa Gevaert NV
Original Assignee
Agfa Gevaert NV
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 Agfa Gevaert NV filed Critical Agfa Gevaert NV
Priority to GB1988766A priority Critical patent/GB1181786A/en
Priority to DE1967A0055375 priority patent/DE1704425B2/en
Priority to FR103694A priority patent/FR1520136A/en
Priority to NL6706267A priority patent/NL6706267A/xx
Priority to BE698010D priority patent/BE698010A/xx
Publication of GB1181786A publication Critical patent/GB1181786A/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
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/20—Edge clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
    • B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
    • B29C55/14—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively
    • B29C55/143—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively firstly parallel to the direction of feed and then transversely thereto
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

1,181,786. Biaxially stretching films. GEVAERT-AGFA N.V. 11 April, 1967 [5 May, 1966], No. 19887/66. Heading B5B. In the production of lay flat films of orientable organic polymers, such as polyethylene terephthalate, wherein the film is biaxially stretched, after the film has been stretched transversely, the margins of the film are heated to a temperature between the temperature at which it has been longitudinally stretched and the melting temperature of the polymer. The film may be heat-set after the heating of the film margins. The heating of the film margins may be effected in such a manner that the extent to which the film margins are heated is at a maximum at the outer edges of the film and decreases inwardly from the edges. As shown in Fig, 2, which is a cross-section of the zone in which the film margins are heated, an infra-red radiator 21 parallel with the film edge and extending along the length of the film is located at each side of the film 9. The radiator comprises a tubular elongate radiation source 22 which is heated electrically and a reflector 23, both located in a metal housing 24. Each housing 24 is provided at the side facing the film with an elongated slotlike mouth which is defined by the lips 25 and 26. The marginal portion of the film is caused to travel centrally between the lips. The temperature of the heater 22 may be about 120‹ C. and the passage of the film through the film margins heating zone causes the wrinkling of the film margins to disappear. This wrinkling of the margins occurs during the biaxial stretching of the film and is due to the marginal portions of the film having become more elongated than the remainder of the film. The difficulty which is otherwise apt to occur in the heat-setting zone due to the jaws of the film margin grippers in the heat setting zone not opening widely enough to receive puckered or wrinkled film margins is thereby obviated. The proper winding up of the film on storage rolls is also facilitated.
GB1988766A 1966-05-05 1966-05-05 Process for making Flat Oriented Film of Polymeric Material Expired GB1181786A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB1988766A GB1181786A (en) 1966-05-05 1966-05-05 Process for making Flat Oriented Film of Polymeric Material
DE1967A0055375 DE1704425B2 (en) 1966-05-05 1967-04-06 PROCESS FOR SMOOTHING FILM RIMS AND DEVICE FOR CARRYING OUT THIS PROCESS
FR103694A FR1520136A (en) 1966-05-05 1967-04-21 Manufacturing process of polymer films or films
NL6706267A NL6706267A (en) 1966-05-05 1967-05-03
BE698010D BE698010A (en) 1966-05-05 1967-05-05

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1988766A GB1181786A (en) 1966-05-05 1966-05-05 Process for making Flat Oriented Film of Polymeric Material

Publications (1)

Publication Number Publication Date
GB1181786A true GB1181786A (en) 1970-02-18

Family

ID=10136826

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1988766A Expired GB1181786A (en) 1966-05-05 1966-05-05 Process for making Flat Oriented Film of Polymeric Material

Country Status (4)

Country Link
BE (1) BE698010A (en)
DE (1) DE1704425B2 (en)
GB (1) GB1181786A (en)
NL (1) NL6706267A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998025754A1 (en) * 1996-12-11 1998-06-18 E.I. Du Pont De Nemours And Company Film bead heating for simultaneous stretching
CN112675710A (en) * 2020-12-24 2021-04-20 迈海(苏州)环保科技有限公司 Tubular membrane fixing and stretching method of tubular filter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6079916A (en) * 1983-10-11 1985-05-07 Mitsubishi Monsanto Chem Co Heating method of thermoplastic resin film

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998025754A1 (en) * 1996-12-11 1998-06-18 E.I. Du Pont De Nemours And Company Film bead heating for simultaneous stretching
CN112675710A (en) * 2020-12-24 2021-04-20 迈海(苏州)环保科技有限公司 Tubular membrane fixing and stretching method of tubular filter
CN112675710B (en) * 2020-12-24 2022-10-21 迈海(苏州)环保科技有限公司 Tubular membrane fixing and stretching method of tubular filter

Also Published As

Publication number Publication date
NL6706267A (en) 1967-06-26
DE1704425A1 (en) 1971-02-11
BE698010A (en) 1967-11-06
DE1704425B2 (en) 1976-05-13

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