GB1433344A - Balanced tensilized polyethylene terephthalate film - Google Patents

Balanced tensilized polyethylene terephthalate film

Info

Publication number
GB1433344A
GB1433344A GB3412373A GB3412373A GB1433344A GB 1433344 A GB1433344 A GB 1433344A GB 3412373 A GB3412373 A GB 3412373A GB 3412373 A GB3412373 A GB 3412373A GB 1433344 A GB1433344 A GB 1433344A
Authority
GB
United Kingdom
Prior art keywords
polyethylene terephthalate
film
terephthalate film
balanced
july
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
GB3412373A
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.)
Celanese Corp
Original Assignee
Celanese 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
Application filed by Celanese Corp filed Critical Celanese Corp
Publication of GB1433344A publication Critical patent/GB1433344A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Multimedia (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Magnetic Record Carriers (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

1433344 Polyethylene terephthalate film CELANESE CORP 18 July 1973 [19 July 1972] 34123/73 Heading B5B A biaxially oriented polyethylene terephthalate film having substantially equal tensile strengths in both longitudinal and transverse directions in the range of 38,000 to 50,000 p.s.i. and substantially equal tensile strengths at 5% elongation in the range 16,000 to 25,000 p.s.i., is made by extruding a melt of the polymer on to a cooled casting drum, longitudinally stretching the film 3À0 to 5À0 times, transversely stretching 3-2 to 5À2 times subject to the limitation that the transverse stretch ratio is greater than the longitudinal stretch ratio and heat setting the film at a temperature of 180‹ to 250‹ C. The film preferably has an intrinsic viscosity of 0À64 to 0À8 deciliter/gram in orthochloro phenol at 25‹ C., a modulus in excess of 600,000 p.s.i. and a breaking elongation of 600,000 p.s.i.
GB3412373A 1972-07-19 1973-07-18 Balanced tensilized polyethylene terephthalate film Expired GB1433344A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27307172A 1972-07-19 1972-07-19

Publications (1)

Publication Number Publication Date
GB1433344A true GB1433344A (en) 1976-04-28

Family

ID=23042423

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3412373A Expired GB1433344A (en) 1972-07-19 1973-07-18 Balanced tensilized polyethylene terephthalate film

Country Status (5)

Country Link
JP (1) JPS5635530B2 (en)
CA (1) CA1013913A (en)
DE (1) DE2336228A1 (en)
FR (1) FR2192904B1 (en)
GB (1) GB1433344A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4316927A (en) * 1978-02-09 1982-02-23 Sony Corporation Magnetic recording medium
US4318957A (en) * 1978-01-05 1982-03-09 U.S. Philips Corporation Carrier foil for a magnetic recording tape, and method of manufacturing same
US4508782A (en) * 1983-12-19 1985-04-02 Toray Industries, Inc. Base film for magnetic recording tape with F-5 values of 9-15 Kg/mm2
US4708902A (en) * 1982-06-08 1987-11-24 Diafoil Company, Limited Polyester films suitable for use in magnetic recording media

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4208447A (en) * 1978-06-05 1980-06-17 International Business Machines Corporation Method for disorienting magnetic particles
DE3066823D1 (en) * 1979-06-25 1984-04-12 Teijin Ltd Biaxially oriented wholly aromatic polyester film and process for producing same
US4436894A (en) * 1980-07-31 1984-03-13 Teijin Limited Novel wholly aromatic copolyester, process for production thereof, and film melt-shaped therefrom
JPS58153232A (en) * 1982-03-05 1983-09-12 Toray Ind Inc Magnetic recording medium
US4546036A (en) * 1983-12-22 1985-10-08 Minnesota Mining And Manufacturing Company Magnetic recording medium having opaque polyester film base
JPS60127440U (en) * 1984-02-06 1985-08-27 スズキ株式会社 Frequency switching device for motor generator

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US838708A (en) * 1904-08-15 1906-12-18 Robert Gorton Garter.
US2823421A (en) * 1952-05-12 1958-02-18 Du Pont Stretching of polyethylene terephthalate film
IT577841A (en) * 1956-09-12
US3257489A (en) * 1961-11-28 1966-06-21 Du Pont Process for improving gauge of organic, thermoplastic, crystallizable polymeric film by stretching during heat treating
GB1083665A (en) * 1965-03-05 1967-09-20 Ici Ltd Biaxially oriented polyethylene terephthalate films
US3432591A (en) * 1966-10-21 1969-03-11 Du Pont Biaxially oriented heat set film of high molecular weight polyethylene terephthalate
US3627579A (en) * 1969-11-18 1971-12-14 Du Pont Unidirectionally oriented film structure of polyethylene terephthalate
JPS5210909B2 (en) * 1971-08-05 1977-03-26

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4318957A (en) * 1978-01-05 1982-03-09 U.S. Philips Corporation Carrier foil for a magnetic recording tape, and method of manufacturing same
US4316927A (en) * 1978-02-09 1982-02-23 Sony Corporation Magnetic recording medium
US4708902A (en) * 1982-06-08 1987-11-24 Diafoil Company, Limited Polyester films suitable for use in magnetic recording media
US4508782A (en) * 1983-12-19 1985-04-02 Toray Industries, Inc. Base film for magnetic recording tape with F-5 values of 9-15 Kg/mm2

Also Published As

Publication number Publication date
JPS4944083A (en) 1974-04-25
DE2336228A1 (en) 1974-02-07
FR2192904A1 (en) 1974-02-15
FR2192904B1 (en) 1977-12-23
CA1013913A (en) 1977-07-19
JPS5635530B2 (en) 1981-08-18

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee