GB1338291A - Production of foamed resins - Google Patents

Production of foamed resins

Info

Publication number
GB1338291A
GB1338291A GB695771A GB695771A GB1338291A GB 1338291 A GB1338291 A GB 1338291A GB 695771 A GB695771 A GB 695771A GB 695771 A GB695771 A GB 695771A GB 1338291 A GB1338291 A GB 1338291A
Authority
GB
United Kingdom
Prior art keywords
roller
resin
sheet
slit
cooled
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
GB695771A
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.)
Monsanto Chemicals Ltd
Original Assignee
Monsanto Chemicals 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 Monsanto Chemicals Ltd filed Critical Monsanto Chemicals Ltd
Priority to GB695771A priority Critical patent/GB1338291A/en
Priority to BE780559A priority patent/BE780559R/en
Priority to FR7208614A priority patent/FR2130164B2/fr
Priority to DE19722212093 priority patent/DE2212093A1/en
Publication of GB1338291A publication Critical patent/GB1338291A/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
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/28—Expanding the moulding material on continuous moving surfaces without restricting the upwards growth of the foam
    • 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

Landscapes

  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

1338291 Making foamed sheets MONSANTO CHEMICALS Ltd 16 Feb 1972 [16 March 1971] 6957/71 Addition to 1264852 Heading B5A A foamed sheet is produced by extruding foamable thermoplastic resin through a die slit 1 into sliding contact with a first roller 5 having its axis parallel to the slit so that as the resin foams its expansion is restricted in a direction parallel to the slit by the frictional contact with the first roller, and passing the resulting foamed sheet 9 through the gap between the roller 5 and a second roller 7. The first roller 5 is stationary or driven in same direction as, but slower or faster than, the resin. The resin may also be in sliding contact with roller 7 or this roller may be an idler. The sheet is cooled by contact with part of the circumference of the rollers 5, 7 which are cooled internally with air or water, or externally by air jets 8. An air knife (not shown) may cool the resin sheet. The sheet is hauled off at a higher speed than it is extruded to reduce sideways expansion, using a roller nip or a co-operating tracks. A glass or matt surface may be imparted by a three roll calender or the sheet may be vacuum or pressure formed, and embossed or laminated to paper, fabric or film. The die is mounted on a screw extruder (not shown) which is heated electrically and cooled by water in coiled tubes fitted in grooves around the barrel. The die body, side plates and lips are separately heated by pressurized steam. Wall and ceiling panels, containers, and body panels and shells of cars, boats and furniture are formed from homo-polymers and co-polymers of olefins, vinyl and vinylidene monomers, and acrylates, including A.B.S. Nucleating agents are included in the resin and blowing agents comprising compressed gases, volatile liquids and decomposable solids are injected under pressure into the melt in the extruder.
GB695771A 1971-03-16 1971-03-16 Production of foamed resins Expired GB1338291A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB695771A GB1338291A (en) 1971-03-16 1971-03-16 Production of foamed resins
BE780559A BE780559R (en) 1971-03-16 1972-03-10 MANUFACTURING OF FLAT SHEETS IN SYNTHETIC RESIN FOAM
FR7208614A FR2130164B2 (en) 1971-03-16 1972-03-13
DE19722212093 DE2212093A1 (en) 1971-03-16 1972-03-13 Method and apparatus for making foam sheet material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB695771A GB1338291A (en) 1971-03-16 1971-03-16 Production of foamed resins

Publications (1)

Publication Number Publication Date
GB1338291A true GB1338291A (en) 1973-11-21

Family

ID=9823937

Family Applications (1)

Application Number Title Priority Date Filing Date
GB695771A Expired GB1338291A (en) 1971-03-16 1971-03-16 Production of foamed resins

Country Status (4)

Country Link
BE (1) BE780559R (en)
DE (1) DE2212093A1 (en)
FR (1) FR2130164B2 (en)
GB (1) GB1338291A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0960826A2 (en) * 1998-03-03 1999-12-01 Fort James Corporation Method for the production of extruded sheets and microwaveable containers obtained from said sheets
WO2019064120A1 (en) * 2017-09-29 2019-04-04 3M Innovative Properties Company Polymeric foam layer and methods of making the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2318725A1 (en) * 1975-07-24 1977-02-18 Charbonnages Ste Chimique Expanded polypropylene sheet for thermoforming - by extruding a compsn. contg. polypropylene, blowing agent and nucleating agent through a sheet die
DE4220442A1 (en) * 1992-06-23 1994-01-05 Reifenhaeuser Masch Foamed plastic sheet prodn. - uses supporting roller in front of slit die to deflect foaming sheet upward towards set of polishing rolls

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6503780A (en) * 1965-03-25 1966-09-26
GB1264852A (en) * 1969-04-15 1972-02-23

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0960826A2 (en) * 1998-03-03 1999-12-01 Fort James Corporation Method for the production of extruded sheets and microwaveable containers obtained from said sheets
EP0960826A3 (en) * 1998-03-03 2000-01-19 Fort James Corporation Method for the production of extruded sheets and microwaveable containers obtained from said sheets
WO2019064120A1 (en) * 2017-09-29 2019-04-04 3M Innovative Properties Company Polymeric foam layer and methods of making the same

Also Published As

Publication number Publication date
FR2130164B2 (en) 1978-03-03
DE2212093A1 (en) 1972-10-26
BE780559R (en) 1972-09-11
FR2130164A2 (en) 1972-11-03

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee