GB1321167A - Polyamide film manufacture - Google Patents

Polyamide film manufacture

Info

Publication number
GB1321167A
GB1321167A GB5612271A GB5612271A GB1321167A GB 1321167 A GB1321167 A GB 1321167A GB 5612271 A GB5612271 A GB 5612271A GB 5612271 A GB5612271 A GB 5612271A GB 1321167 A GB1321167 A GB 1321167A
Authority
GB
United Kingdom
Prior art keywords
film
polyamide
temperature
stepwise
undrawn film
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
GB5612271A
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.)
Toyobo Co Ltd
Original Assignee
Toyobo 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 JP10784370A external-priority patent/JPS505751B1/ja
Priority claimed from JP10784470A external-priority patent/JPS505752B1/ja
Application filed by Toyobo Co Ltd filed Critical Toyobo Co Ltd
Publication of GB1321167A publication Critical patent/GB1321167A/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
    • B29C55/10—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
    • B29C55/16—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial simultaneously
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material

Landscapes

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

Abstract

1321167 Biaxially oriented polyamide films TOYO BOSEKI KK 3 Dec 1971 [4 Dec 1970 (2)] 56122/71 Heading B5B An undrawn film of a polyamide is subjected to simultaneous or stepwise biaxial drawing at a temperature within a range as calculated according to the following inequality in the case of the simultaneous drawings:- - 10 W + 120 + 12 log(8/1000)>T#- 6 W + 80 or according to the following inequality in the case of the stepwise drawing:- - 10 W + 130 + 7 log (8/1000)>T # - 6 W + 80 wherein W is the moisture content (% by weight) of the undrawn film, # is the drawing speed (%/min), defined as:- Length after drawing # = ------- Î 100¸Drawing Time (mins) Length before drawing and T is the drawing temperature (‹C.), said polyamide containing in the molecule not less than 70% (mol) of the repeating unit constituted with metaxylene diamine or its mixture with paraxylylenediamine (of which the content is not more than 30% (mol) on the basis of the total amount of metaxylylenediamine and paraxylylenediamine) and an α,#-aliphatic dicarboxylic acid having 6 to 10 carbon atoms. The undrawn film may be made of a polyamide having a relative viscosity of 2À0 to 4À0, determined in solution in 96% sulphuric acid at a concentration of 1g./100 ml. at 25‹ C., and suitably has a moisture content of 0À1 to 5À0% by weight. Drawing may be effected simultaneously with a drawing speed of from 500 to 50,000%/min., or stepwise with a drawing speed of 500 to 500,000%/min. in the longitudinal direction and 500 to 50,000%/min. in the transverse direction; the ratio of the drawing speed in the longitudinal direction to that in the transverse direction may be from 0À5 to 2. After drawing, the film may be heat-treated, suitably at a temperature lying between 5‹ C. above the temperature used in drawing the undrawn film and the melting temperature of the drawn film, for a period of not more than 5 mins. Film so drawn shows enhanced tensile properties, transparency and gas barrier properties, especially a much lower permeability to oxygen than conventional polyamide or polyester films.
GB5612271A 1970-12-04 1971-12-03 Polyamide film manufacture Expired GB1321167A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10784370A JPS505751B1 (en) 1970-12-04 1970-12-04
JP10784470A JPS505752B1 (en) 1970-12-04 1970-12-04

Publications (1)

Publication Number Publication Date
GB1321167A true GB1321167A (en) 1973-06-20

Family

ID=26447813

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5612271A Expired GB1321167A (en) 1970-12-04 1971-12-03 Polyamide film manufacture

Country Status (3)

Country Link
DE (1) DE2160118B2 (en)
FR (1) FR2116530B1 (en)
GB (1) GB1321167A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2716710A1 (en) * 1976-04-19 1977-11-03 Toyo Boseki Process for the production of biaxially oriented films from polyamide blends
US20130123439A1 (en) * 2011-06-10 2013-05-16 Mitsubishi Gas Chemical Company, Inc. Reactive polyamide resins and polyamide resin compositions

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4522867A (en) * 1983-08-23 1985-06-11 Phillips Petroleum Company Biaxially oriented polyamide film
US6562276B1 (en) 1998-08-20 2003-05-13 Eastman Chemical Company Process for forming a multilayer, coinjected article

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2716710A1 (en) * 1976-04-19 1977-11-03 Toyo Boseki Process for the production of biaxially oriented films from polyamide blends
US20130123439A1 (en) * 2011-06-10 2013-05-16 Mitsubishi Gas Chemical Company, Inc. Reactive polyamide resins and polyamide resin compositions
US8993677B2 (en) * 2011-06-10 2015-03-31 Mitsubishi Gas Chemical Company, Inc. Reactive polyamide resins and polyamide resin compositions

Also Published As

Publication number Publication date
FR2116530A1 (en) 1972-07-13
FR2116530B1 (en) 1975-02-21
DE2160118A1 (en) 1972-06-08
DE2160118B2 (en) 1977-03-03

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years