GB1110350A - Process of producing flexible foam polystyrene sheeting - Google Patents

Process of producing flexible foam polystyrene sheeting

Info

Publication number
GB1110350A
GB1110350A GB5949/67A GB594967A GB1110350A GB 1110350 A GB1110350 A GB 1110350A GB 5949/67 A GB5949/67 A GB 5949/67A GB 594967 A GB594967 A GB 594967A GB 1110350 A GB1110350 A GB 1110350A
Authority
GB
United Kingdom
Prior art keywords
particles
styrene
expanding
expanding agent
temperature
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
GB5949/67A
Inventor
Gerhard Kracht
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.)
Swedish Crucible Steel Co
Original Assignee
Swedish Crucible Steel Co
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 Swedish Crucible Steel Co filed Critical Swedish Crucible Steel Co
Publication of GB1110350A publication Critical patent/GB1110350A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C08J9/22—After-treatment of expandable particles; Forming foamed products
    • C08J9/228—Forming foamed products
    • C08J9/232—Forming foamed products by sintering expandable particles
    • 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
    • B29C44/3461—Making or treating expandable particles
    • 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
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/44—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form
    • B29C44/445—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form in the form of expandable granules, particles or beads
    • 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
    • B29C44/3415—Heating or cooling
    • B29C44/3426—Heating by introducing steam in the mould
    • 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
    • B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
    • 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
    • C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2325/02—Homopolymers or copolymers of hydrocarbons
    • C08J2325/04—Homopolymers or copolymers of styrene

Abstract

Flexible, resilient, foamed polystyrene is produced by pre-expanding granules of polystyrene plastics material containing an expanding agent, by applying steam thereto within a vertically unconfined space at a temperature substantially above 212 DEG F., into larger particles having lower density but possessing further expansibility, drying the thus pre-expanded particles at 100 DEG to 300 DEG F. to remove condensed steam and prevent condensation of the expanding agent in the particles, further expanding and moulding the thus heated particles in a closed moulding chamber at elevated pressure and a temperature above 212 DEG F. into a moulded, foam, plastics body which is removed from the chamber whilst still at a temperature of from 100 DEG to 200 DEG F., and severing sheeting from said body whilst at the same temperature range of from 100 DEG to 200 DEG F. Additional external heat may be applied during severing to reduce shrinkage of the body and the resulting sheets may be compressed whilst still hot to increase resilience and render the surfaces smooth or heated at 150 DEG to 180 DEG F. to further reduce the density and increase resilience. Suitable polymers are homopolymers of styrene and copolymers of styrene that contain at least 50% by weight of styrene and mixtures of such polymers. Copolymerizable monomers are conjugated 1,3-dienes, alpha-beta unsaturated monocarboxylic acids and derivatives thereof, esters of methacrylic acid and vinyl esters of carboxylic acids. The expanding agent is suitably pentane, hexane, heptane, petroleum ether, cyclopentane, cyclohexane or other saturated aliphatic or cycloaliphatic volatile liquids.
GB5949/67A 1967-03-09 1967-02-08 Process of producing flexible foam polystyrene sheeting Expired GB1110350A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0108712 1967-03-09

Publications (1)

Publication Number Publication Date
GB1110350A true GB1110350A (en) 1968-04-18

Family

ID=7528985

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5949/67A Expired GB1110350A (en) 1967-03-09 1967-02-08 Process of producing flexible foam polystyrene sheeting

Country Status (2)

Country Link
DE (1) DE1704984A1 (en)
GB (1) GB1110350A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2314523A (en) * 1996-06-25 1998-01-07 Northern Telecom Ltd Antenna dielectric
GB2314524A (en) * 1996-06-25 1998-01-07 Northern Telecom Ltd Antenna ground plane substrate
US11014276B2 (en) 2013-02-20 2021-05-25 Kurtz Gmbh Method and device for producing a foam particle part

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014117332A1 (en) 2014-11-26 2016-06-02 Kurtz Gmbh Method and device for producing particle foam parts
WO2017060315A1 (en) 2015-10-05 2017-04-13 systemreha GmbH & Co. KG Training apparatus
DE202015105239U1 (en) 2015-10-05 2017-01-09 systemreha GmbH & Co. KG training device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2314523A (en) * 1996-06-25 1998-01-07 Northern Telecom Ltd Antenna dielectric
GB2314524A (en) * 1996-06-25 1998-01-07 Northern Telecom Ltd Antenna ground plane substrate
US11014276B2 (en) 2013-02-20 2021-05-25 Kurtz Gmbh Method and device for producing a foam particle part

Also Published As

Publication number Publication date
DE1704984A1 (en) 1972-02-17

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