GB1223967A - Heat-recoverable sheet of macromolecular material and process for its manufacture - Google Patents

Heat-recoverable sheet of macromolecular material and process for its manufacture

Info

Publication number
GB1223967A
GB1223967A GB1464069A GB1464069A GB1223967A GB 1223967 A GB1223967 A GB 1223967A GB 1464069 A GB1464069 A GB 1464069A GB 1464069 A GB1464069 A GB 1464069A GB 1223967 A GB1223967 A GB 1223967A
Authority
GB
United Kingdom
Prior art keywords
sheet
strip
roller
force
roll
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
GB1464069A
Inventor
William Rosse Heslop
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.)
Raychem Corp
Original Assignee
Raychem 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 Raychem Corp filed Critical Raychem Corp
Publication of GB1223967A publication Critical patent/GB1223967A/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
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06—Making preforms having internal stresses, e.g. plastic memory
    • 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
    • B29C55/18—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets by squeezing between surfaces, e.g. rollers
    • 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
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/003—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor characterised by the choice of material
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • 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
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • 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
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
    • 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
    • B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
    • B29K2033/04—Polymers of esters
    • 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
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • 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
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • 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
    • 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
    • B29K2096/00—Use of specified macromolecular materials not provided for in a single one of main groups B29K2001/00 - B29K2095/00, as moulding material
    • B29K2096/005—Ionomers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products

Landscapes

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

Abstract

1,223,967. Heat-recoverable sheet of polymeric material. RAYCHEM CORP. 20 March 1969 [22 March, 1968], No. 14640/69. Heading B5B. [Also in Division F2] A process for expanding a sheet or strip of a polymeric material capable of having the property of heat-recoverability imparted in it, which comprises applying a force to the sheet or strip in a direction perpendicular to the sheet or strip, the force being sufficient to reduce the thickness and increase at least one of the other dimensions of the sheet or strip, in the absence of tension in the sheet or strip, the temperature of the sheet or strip while the force is applied being, for a crystalline material in the range of from 60‹ C. to the crystalline melting point of the material or a temperature not exceeding the upper limit of the crystalline melting range of the material or, for a non-crystalline material, in the range of from 60‹ C. to the softening point of the material. The force is preferably sufficient to reduce the thickness and increase only one of the other dimensions of the sheet or strip. The "softening point" of the material is measured as specified in ASTM 648 using the 264 p.s.i. stress. As shown in the drawing, polymeric sheet material 3 to be treated is withdrawn from the supply reel 1 (which is provided with a let-off braking mechanism in the form of a roller 2) over an idler roll 4 by a slowly rotating driven steam-heated roller 5 and is expanded in the longitudinal direction at a nip 6 between roller 5 and steam-heated roller 7 which is driven at a higher peripheral speed than roller 5 to accommodate the expanded sheet. The expanded sheet 3 is then passed over a fast-moving cooling roll 9 and the sheet 3 is then passed over an idler roll 10 and on to wind up roll 11 having a constant torque wind-up drive 12. In an example, a 6-inch wide strip, 0À050 inch thick, of high-density polyethylene is irradiated by passing it under a 1 MEV high energy electron beam and then passed through a steam-heated triple roll mill. The first two rollers are maintained at 104‹ C. and the third roller, which has the highest peripheral speed, is water cooled. The selective speeds of the strip on the input and output sides of the mill are in the ratio 1: 1À35 giving a longitudinal expansion of 35%. A 69 inch length of the strip is coated with mastic and wrapped around a 20-inch diameter pipe, fastened and recovered by heating with infra-red rays from a catalytic heater. The width of the recovered sleeve is 5¥ inches.
GB1464069A 1968-03-22 1969-03-20 Heat-recoverable sheet of macromolecular material and process for its manufacture Expired GB1223967A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US71539768A 1968-03-22 1968-03-22

Publications (1)

Publication Number Publication Date
GB1223967A true GB1223967A (en) 1971-03-03

Family

ID=24873862

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1464069A Expired GB1223967A (en) 1968-03-22 1969-03-20 Heat-recoverable sheet of macromolecular material and process for its manufacture

Country Status (6)

Country Link
BE (1) BE730278A (en)
CH (1) CH486308A (en)
DE (1) DE1914455A1 (en)
FR (1) FR2004578A1 (en)
GB (1) GB1223967A (en)
NL (1) NL6904421A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0045212A2 (en) * 1980-07-28 1982-02-03 Raychem Limited Heat-recoverable article and process for producing the same
US4944987A (en) * 1984-04-06 1990-07-31 N. V. Raychem S. A. Heat recoverable articles
US5008059A (en) * 1986-04-14 1991-04-16 R X S Schrumpftechnik-Garnituren Gmbh Method for manufacturing a plastic part having a shape memory
US5236765A (en) * 1984-04-06 1993-08-17 Nv Raychem Sa Heat-recoverable article
AU671000B2 (en) * 1993-04-22 1996-08-08 Stewing Nachrichtentechnik Gmbh & Co. Kg Berlin Process to increase the resistance to tearing of a heat-resettable material web

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1411943A (en) * 1971-10-12 1975-10-29 Raychem Ltd Covering methods
AU6141980A (en) * 1979-08-28 1981-03-05 Bicc Ltd. Heat recoverable articles
IL63430A (en) * 1980-07-28 1985-10-31 Raychem Ltd Heat recoverable polymeric articles and their production
US4510300A (en) * 1982-04-08 1985-04-09 E. I. Du Pont De Nemours And Company Perfluorocarbon copolymer films
JPS6056532A (en) * 1983-09-09 1985-04-02 Unitika Ltd Manufacture of fluorine group stretched film
US4544721A (en) * 1983-10-06 1985-10-01 E. I. Du Pont De Nemours And Company Chlorotriflouroethylene polymer oriented films
DE3509119A1 (en) * 1985-03-14 1986-09-18 WIRSBO PEX Platzer Schwedenbau GmbH, 6056 Heusenstamm METHOD FOR PROCESSING SEMI-FINISHED PRODUCTS FROM CROSSLINKED PLASTICS

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0045212A2 (en) * 1980-07-28 1982-02-03 Raychem Limited Heat-recoverable article and process for producing the same
EP0045212A3 (en) * 1980-07-28 1982-02-10 Raychem Limited Heat-recoverable article and process for producing the same
US4944987A (en) * 1984-04-06 1990-07-31 N. V. Raychem S. A. Heat recoverable articles
US5236765A (en) * 1984-04-06 1993-08-17 Nv Raychem Sa Heat-recoverable article
US5008059A (en) * 1986-04-14 1991-04-16 R X S Schrumpftechnik-Garnituren Gmbh Method for manufacturing a plastic part having a shape memory
AU671000B2 (en) * 1993-04-22 1996-08-08 Stewing Nachrichtentechnik Gmbh & Co. Kg Berlin Process to increase the resistance to tearing of a heat-resettable material web

Also Published As

Publication number Publication date
DE1914455A1 (en) 1969-11-06
NL6904421A (en) 1969-09-24
CH486308A (en) 1970-02-28
FR2004578A1 (en) 1969-11-28
BE730278A (en) 1969-09-22

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