GB1195279A - Production of Foamed Resins - Google Patents

Production of Foamed Resins

Info

Publication number
GB1195279A
GB1195279A GB50037/67A GB5003767A GB1195279A GB 1195279 A GB1195279 A GB 1195279A GB 50037/67 A GB50037/67 A GB 50037/67A GB 5003767 A GB5003767 A GB 5003767A GB 1195279 A GB1195279 A GB 1195279A
Authority
GB
United Kingdom
Prior art keywords
resin
die orifice
extruding
concave surfaces
slit
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
GB50037/67A
Inventor
John Gerald Mccoy
William Rees Foster
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
Priority to FR171956A priority Critical patent/FR95884E/en
Application filed by Monsanto Chemicals Ltd filed Critical Monsanto Chemicals Ltd
Priority to GB50037/67A priority patent/GB1195279A/en
Priority to NL6815300A priority patent/NL6815300A/xx
Priority to BE723096D priority patent/BE723096A/xx
Priority to DE19681806898 priority patent/DE1806898A1/en
Publication of GB1195279A publication Critical patent/GB1195279A/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
    • B29C44/36—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
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B29K2105/043—Skinned foam
    • 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

1,195,279. Extruding foamed resin boards. MONSANTO CHEMICALS Ltd. 1 Oct., 1968 [3 Nov., 1967], No. 50037/67. Addition to 1,089,562. Heading B5A. [Also in Division C3] An extruded foamed resin board is prepared by extruding a foamable thermoplastic polyvinylaromatic resin through a slit die orifice 3, narrowed by a steel strip 4, into a zone of lower pressure defined by a pair of opposed concave curved surfaces 6, 7 maintained at a temperature below the extrusion temperature (that is to say, the temperature of the unfoamed resin at the die orifice), such that the foaming of the resin occurs as it moves through the zone and the curvature of the concave surfaces being such that they contact corresponding convex surfaces of the expanding and foaming resin. The slit die orifice preferably has a gap of 0À005 to 0À03 inch and a land of 0À07 to 0À2 inch. The cross-section of the concave surfaces is preferably an arc of a circle e.g. of radius # to 2 ¢ inches. The greatest distance apart of the concave surfaces is preferably 10 to 100 times the gap of the die orifice. The concave surfaces may be succeeded by a pair of flat surfaces 13, 14 diverging from each other along the direction of extrusion. The extruding resin may be supported by a series of rollers 16, 17 from the point of maximum expansion. Side pieces may limit the expansion along the length of the die slit. Passages 12 and 15 allow the circulation of cooling water.
GB50037/67A 1967-11-03 1967-11-03 Production of Foamed Resins Expired GB1195279A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FR171956A FR95884E (en) 1967-11-03 Resin foams refinements.
GB50037/67A GB1195279A (en) 1967-11-03 1967-11-03 Production of Foamed Resins
NL6815300A NL6815300A (en) 1967-11-03 1968-10-25
BE723096D BE723096A (en) 1967-11-03 1968-10-29
DE19681806898 DE1806898A1 (en) 1967-11-03 1968-11-04 Process and appts for extruding foamed plasic panels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB50037/67A GB1195279A (en) 1967-11-03 1967-11-03 Production of Foamed Resins

Publications (1)

Publication Number Publication Date
GB1195279A true GB1195279A (en) 1970-06-17

Family

ID=10454412

Family Applications (1)

Application Number Title Priority Date Filing Date
GB50037/67A Expired GB1195279A (en) 1967-11-03 1967-11-03 Production of Foamed Resins

Country Status (5)

Country Link
BE (1) BE723096A (en)
DE (1) DE1806898A1 (en)
FR (1) FR95884E (en)
GB (1) GB1195279A (en)
NL (1) NL6815300A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0734830A2 (en) * 1995-03-31 1996-10-02 Cannon S.P.A. Frothing device for polyurethane mixtures

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE757054R (en) * 1969-10-06 1971-04-05 Monsanto Chemicals IMPROVEMENTS WITH FOAMS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0734830A2 (en) * 1995-03-31 1996-10-02 Cannon S.P.A. Frothing device for polyurethane mixtures
EP0734830A3 (en) * 1995-03-31 1997-03-19 Cannon Spa Frothing device for polyurethane mixtures

Also Published As

Publication number Publication date
BE723096A (en) 1969-04-29
NL6815300A (en) 1969-05-06
FR95884E (en) 1971-11-12
DE1806898A1 (en) 1971-05-13

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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