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GB1247911A - Process for the production of cellular articles - Google Patents

Process for the production of cellular articles

Info

Publication number
GB1247911A
GB1247911A GB3560968A GB3560968A GB1247911A GB 1247911 A GB1247911 A GB 1247911A GB 3560968 A GB3560968 A GB 3560968A GB 3560968 A GB3560968 A GB 3560968A GB 1247911 A GB1247911 A GB 1247911A
Authority
GB
United Kingdom
Prior art keywords
resin
moulding
mould
unfoamable
foamed
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
GB3560968A
Inventor
Paul Johnson Garner
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 GB3560968A priority Critical patent/GB1247911A/en
Publication of GB1247911A publication Critical patent/GB1247911A/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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3484—Stopping the foaming reaction until the material is heated or re-heated
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/0407—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by regulating the temperature of the mould or parts thereof, e.g. cold mould walls inhibiting foaming of an outer layer
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/0446—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by increasing the density locally by compressing part of the foam while still in the mould
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/34—Chemical features in the manufacture of articles consisting of a foamed macromolecular core and a macromolecular surface layer having a higher density than the core
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

1,247,911. Moulding foamed plastics. IMPERIAL CHEMICAL INDUSTRIES Ltd. 14 July, 1969 [25 July, 1968], No. 35609/68. Heading B5A. [Also in Division C3] Articles having a foamed case with integral unfoamed surface skins are made by injecting an unfoamable synthetic resin into a mould and then injecting a synthetic resin containing a blowing agent to within the unfoamable resin under such conditions that foaming is prevented in the mould, the moulding is allowed to cool until it is below the temperature at which foaming would take place under atmospheric pressure, removed from the mould and shaped under such conditions of heat and pressure that the blowing agent is activated to foam the core of the moulding. The unfoamable resin may be polypropylene, polyvinyl chloride polyethylene, polybutene, poly-4-methyl pentene-1, polymers of styrene or methyl methacrylate, or polyethylene terephthalate. The foamable resin may be the same as or different from the unfoamed resin. The moulding may be shaped by vacuum forming and only selected areas may be foamed by applying pressure to the areas which are not to be foamed while the moulding is heated to the foaming temperature. A second amount of unfoamable resin may be injected into the mould after the foamable resin.
GB3560968A 1968-07-25 1968-07-25 Process for the production of cellular articles Expired GB1247911A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3560968A GB1247911A (en) 1968-07-25 1968-07-25 Process for the production of cellular articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3560968A GB1247911A (en) 1968-07-25 1968-07-25 Process for the production of cellular articles

Publications (1)

Publication Number Publication Date
GB1247911A true GB1247911A (en) 1971-09-29

Family

ID=10379624

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3560968A Expired GB1247911A (en) 1968-07-25 1968-07-25 Process for the production of cellular articles

Country Status (1)

Country Link
GB (1) GB1247911A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2124542A (en) * 1982-07-05 1984-02-22 Cibie Projecteurs Injection moulding composite article
EP1393876A1 (en) * 2002-08-26 2004-03-03 Alcan Technology & Management Ltd. Method of making foam article from thermoplastic material
GB2415162A (en) * 2004-06-15 2005-12-21 L & L Products Inc Improvements in or relating to laminar mouldings

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2124542A (en) * 1982-07-05 1984-02-22 Cibie Projecteurs Injection moulding composite article
US4459257A (en) * 1982-07-05 1984-07-10 Cibie Projecteurs Process for producing a shaped article by injection moulding
EP1393876A1 (en) * 2002-08-26 2004-03-03 Alcan Technology & Management Ltd. Method of making foam article from thermoplastic material
GB2415162A (en) * 2004-06-15 2005-12-21 L & L Products Inc Improvements in or relating to laminar mouldings

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