GB1264852A - - Google Patents

Info

Publication number
GB1264852A
GB1264852A GB1918769A GB1264852DA GB1264852A GB 1264852 A GB1264852 A GB 1264852A GB 1918769 A GB1918769 A GB 1918769A GB 1264852D A GB1264852D A GB 1264852DA GB 1264852 A GB1264852 A GB 1264852A
Authority
GB
United Kingdom
Prior art keywords
sheet
roller
thermoplastics
film
inch
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
GB1918769A
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 filed Critical
Publication of GB1264852A publication Critical patent/GB1264852A/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
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • 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
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
    • B29C44/505—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying extruding the compound through a flat die
    • 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
    • B29L2007/00—Flat articles, e.g. films or sheets

Abstract

1,264,852. Extruding foamed plastics sheet. MONSANTO CHEMICALS Ltd. 18 March, 1970 [15 April, 1969], No. 19187/69. Heading B5A. [Also in Division C3] Widthwise expansion and consequent surface corrugation of an extruded foamed thermoplastics sheet or film 6 e.g. of 0À02 to 0À5 inch thickness, is restricted e.g. to below 15%, by adherence of the extrudate during expansion thereof to an endless moving arcuate surface e.g. a cylindrical roller of 1 to 10 inch diameter, which is cooled to a temperature below the softening point of the thermoplastics, and is located at 0À02 to 0À5 inch from the orifice 5 of a heated extruder 1. In the particular examples, the sheet or film 6 is produced from polyethylene or ethylene/vinyl acetate copolymer including calcium propionate nucleating agent and using, as blowing agent, nitrogen injected into the extruder barrel; polystyrene including talc nucleating agent and using carbon dioxide injected into the barrel. Various other thermoplastics, blowing agents of a gaseous liquid or decomposable solid nature and nucleating agents are referred to in the Specification. The expanded sheet preferably comprises closed cells of 0À001 to 0À05 inch diameter. Expansion of the sheet 6 may continue after removal from the roller 6, which may be idle or driven by a variable speed drive, and may be air cooled on the external surface thereof, or may be internally air or water cooled. The sheet 6 is drawn from the roller 7 by a roller nip or endless track mechanism and may be further calendered to impart a glossy or matted surface thereto, and may be laminated to film.
GB1918769A 1969-04-15 1969-04-15 Expired GB1264852A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1918769 1969-04-15

Publications (1)

Publication Number Publication Date
GB1264852A true GB1264852A (en) 1972-02-23

Family

ID=10125199

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1918769A Expired GB1264852A (en) 1969-04-15 1969-04-15

Country Status (7)

Country Link
JP (1) JPS5333627B1 (en)
BE (1) BE748951A (en)
CA (1) CA936663A (en)
DE (1) DE2017843B2 (en)
ES (1) ES378511A1 (en)
FR (1) FR2043123A5 (en)
GB (1) GB1264852A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6495206B1 (en) * 2000-01-14 2002-12-17 Morbern, Inc. Method of making an expaned extruded polymeric textile
EP1741744A2 (en) * 2000-02-04 2007-01-10 Dow Gloval Technologies Inc. A process for producing thermoformable foam sheet using a physical blowing agent
EP2743051A1 (en) 2012-12-14 2014-06-18 Promix Solutions AG Method for cooling of foamed plastic materials
CN111347578A (en) * 2020-05-04 2020-06-30 朱纪南 Rubber processing temperature control stirring and kneading machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1338291A (en) * 1971-03-16 1973-11-21 Monsanto Chemicals Production of foamed resins
GB1366703A (en) * 1971-06-04 1974-09-11 Monsanto Ltd Foamed resin laminates

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6495206B1 (en) * 2000-01-14 2002-12-17 Morbern, Inc. Method of making an expaned extruded polymeric textile
EP1741744A2 (en) * 2000-02-04 2007-01-10 Dow Gloval Technologies Inc. A process for producing thermoformable foam sheet using a physical blowing agent
EP1741744A3 (en) * 2000-02-04 2009-03-04 Dow Global Technologies Inc. A process for producing thermoformable foam sheet using a physical blowing agent
EP2743051A1 (en) 2012-12-14 2014-06-18 Promix Solutions AG Method for cooling of foamed plastic materials
CN111347578A (en) * 2020-05-04 2020-06-30 朱纪南 Rubber processing temperature control stirring and kneading machine

Also Published As

Publication number Publication date
CA936663A (en) 1973-11-13
ES378511A1 (en) 1972-06-16
DE2017843B2 (en) 1976-06-24
BE748951A (en) 1970-10-14
DE2017843A1 (en) 1971-02-18
JPS5333627B1 (en) 1978-09-14
FR2043123A5 (en) 1971-02-12

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Legal Events

Date Code Title Description
PS Patent sealed
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee