GB1025656A - Process for the heat treatment of synthetic polymeric films - Google Patents

Process for the heat treatment of synthetic polymeric films

Info

Publication number
GB1025656A
GB1025656A GB39403/63A GB3940363A GB1025656A GB 1025656 A GB1025656 A GB 1025656A GB 39403/63 A GB39403/63 A GB 39403/63A GB 3940363 A GB3940363 A GB 3940363A GB 1025656 A GB1025656 A GB 1025656A
Authority
GB
United Kingdom
Prior art keywords
film
roll
lateral restraint
around
earthing
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
GB39403/63A
Inventor
Anthony Graham Marshall Last
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB39403/63A priority Critical patent/GB1025656A/en
Priority to LU47090A priority patent/LU47090A1/xx
Priority to NL6411602A priority patent/NL6411602A/xx
Priority to ES0304742A priority patent/ES304742A1/en
Priority to FR990690A priority patent/FR1410783A/en
Priority to DE19641504415 priority patent/DE1504415A1/en
Priority to BE654103A priority patent/BE654103A/xx
Publication of GB1025656A publication Critical patent/GB1025656A/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
    • 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
    • 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
    • B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
    • 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
    • B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
    • B29C48/9155—Pressure 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
    • 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
    • B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
    • B29C48/9165—Electrostatic pinning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • 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
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • 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
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • 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
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Laminated Bodies (AREA)

Abstract

1,025,656. Heat treating oriented films. IMPERIAL CHEMICAL INDUSTRIES Ltd. Sept. 24, 1964 [Oct. 7, 1963], No. 39403/63. Heading B5B. An oriented film of a synthetic organic thermoplastic crystallizable polymeric material is heat-treated in a continuous manner to render it substantially sag-free by causing the film to travel around and in contact with the peripheral surface of a first rotating roll which is maintained at a temperature (below the melting point of the film) which would cause the film to shrink laterally in the absence of any lateral restraint, applying lateral restraint to the film over at least part of its travel round the surface of said first roll whereby the width of the film remains constant, then permitting the film to relax by a controlled amount in at least the longitudinal direction by passing it around at least one second heated roll rotating at a peripheral speed less than that of the first roll and quenching the heat-treated film. The term " oriented film " is defined as a film which has been drawn in one direction to induce molecular orientation in that direction or biaxially in the longitudinal and transverse directions simultaneously or in sequence. Lateral restraint may be applied to the film by holding the edges of the film against the roll by means of two elastomeric surfaces moving in the same direction and at the same speed as the film, the surface being spaced apart laterally with respect to the longitudinal axis of the film. They preferably do not have an independent drive and are driven by the roll via the film. The surfaces may be provided by endless rubber belts of Vee or rectangular cross-section travelling around pulleys. Alternatively lateral restraint may be applied to the film by electrically earthing the peripheral surface of the roll and to deposit an electrostatic charge on the surface of the film which does not contact the roll. The charge may be deposited along the edges of the film at least over the initial part of its travel around the roll, or it may be deposited along a line extending across the width of the film at or near the line where the film first contacts the roll. After passing over the roll, the charged surface of the film is discharged by contacting it with earthing means (or causing it to pass very near to earthing means) before passing it to the next stage of the process.
GB39403/63A 1963-10-07 1963-10-07 Process for the heat treatment of synthetic polymeric films Expired GB1025656A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB39403/63A GB1025656A (en) 1963-10-07 1963-10-07 Process for the heat treatment of synthetic polymeric films
LU47090A LU47090A1 (en) 1963-10-07 1964-10-06
NL6411602A NL6411602A (en) 1963-10-07 1964-10-06
ES0304742A ES304742A1 (en) 1963-10-07 1964-10-07 Process for the heat treatment of synthetic polymeric films
FR990690A FR1410783A (en) 1963-10-07 1964-10-07 Method and apparatus for heat treatment of polymer sheets
DE19641504415 DE1504415A1 (en) 1963-10-07 1964-10-07 Process for the heat treatment of polymer films
BE654103A BE654103A (en) 1963-10-07 1964-10-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB39403/63A GB1025656A (en) 1963-10-07 1963-10-07 Process for the heat treatment of synthetic polymeric films

Publications (1)

Publication Number Publication Date
GB1025656A true GB1025656A (en) 1966-04-14

Family

ID=10409356

Family Applications (1)

Application Number Title Priority Date Filing Date
GB39403/63A Expired GB1025656A (en) 1963-10-07 1963-10-07 Process for the heat treatment of synthetic polymeric films

Country Status (5)

Country Link
BE (1) BE654103A (en)
DE (1) DE1504415A1 (en)
ES (1) ES304742A1 (en)
GB (1) GB1025656A (en)
NL (1) NL6411602A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4436888A (en) * 1982-10-05 1984-03-13 E. I. Du Pont De Nemours And Company Method for making balanced low shrink tension polyolefin film
DE3340578A1 (en) * 1983-11-09 1985-05-15 Stork Brabant B.V., Boxmeer Web of a plastics material, especially having filtering properties, as well as process and device for producing a web of this type
JP2845324B2 (en) * 1988-10-13 1999-01-13 株式会社興人 Biaxially stretched polyamide film and method for producing the same
DE102022105779A1 (en) 2022-03-11 2023-09-14 Focke & Co. (Gmbh & Co. Kg) Device and method for handling blanks for wrapping packages for cigarette industry products

Also Published As

Publication number Publication date
NL6411602A (en) 1965-04-08
DE1504415A1 (en) 1969-09-11
ES304742A1 (en) 1965-04-01
BE654103A (en) 1965-04-07

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