GB1439805A - Method of manufacturing foamed thermoplastic resins - Google Patents

Method of manufacturing foamed thermoplastic resins

Info

Publication number
GB1439805A
GB1439805A GB2697273A GB2697273A GB1439805A GB 1439805 A GB1439805 A GB 1439805A GB 2697273 A GB2697273 A GB 2697273A GB 2697273 A GB2697273 A GB 2697273A GB 1439805 A GB1439805 A GB 1439805A
Authority
GB
United Kingdom
Prior art keywords
foaming
foaming agent
resin
mixture
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
GB2697273A
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.)
Eneos Corp
Original Assignee
Nippon Petrochemicals Co 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 Nippon Petrochemicals Co Ltd filed Critical Nippon Petrochemicals Co Ltd
Publication of GB1439805A publication Critical patent/GB1439805A/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
    • C08J9/34—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
    • 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
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • 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
    • 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
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/12—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of short lengths, e.g. chopped filaments, staple fibres or bristles
    • 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
    • B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised

Landscapes

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

Abstract

1439805 Extruding foamed resin NIPPON PETROCHEMICALS CO Ltd 6 June 1973 26972/73 Heading B5A [Also in Division C3] Foamed continuously extruded thermoplastic resin articles having a foamed inner portion and a non-foamed surface layer are made by melting and mixing a mixture of a thermoplastic resin and a foaming agent having a decomposition temperature (for a chemical foaming agent) or boiling point (for a physical foaming agent) above the m.p. of the resin by heating the mixture to a temperature below the activation temperature of the foaming agent and above the m.p. of the resin, heating the melt to above the activation temperature of the foaming agent without further mixing and under sufficient pressure to suppress substantial foaming (i.e. keeping the gas bubbles produced at a minimum size and uniformly distributed), causing the melt to expand by feeding it into a die held at a temperature and pressure below that of the preceding step but above the m.p. of the resin, the expansion being confined to the inner portion of the mixture. Fig. 2 shows an apparatus for carrying out the above foaming wherein a hopper 1b, feeds a mixture of resin and foaming agent to an extruder having cylinder, 1a, provided with external heater (not shown), screw, 1d, outlet, 1c, and a screen pack, 1e. The melted mixture is fed to a heated pressurized chamber, 2a, connected to the extruder by a flange, 5, where the foaming agent is gasified without substantial foaming and the melt is then fed into a foaming die, 3a, 3b, 3c, at a lower pressure and temperature than 2a and where a skinned foamed material is formed and then solidified in sizing die 4a, 4b, 4c which is disposed in water in a trough, 8, having inlet 8a, and outlet, 8b, and also guide rollers, 8d and 8e, to guide the product, 10, to take-off rollers 9. Fig. 6 shows a heater, 3e, in the melt passage, 3d, of the foaming die, 3a; a throttle plate, 6c, being located between two flanges 6 and 7 being flanges between the foaming, 3a, and sizing, 4a, dies.
GB2697273A 1973-02-23 1973-06-06 Method of manufacturing foamed thermoplastic resins Expired GB1439805A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48021880A JPS49110760A (en) 1973-02-23 1973-02-23

Publications (1)

Publication Number Publication Date
GB1439805A true GB1439805A (en) 1976-06-16

Family

ID=12067424

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2697273A Expired GB1439805A (en) 1973-02-23 1973-06-06 Method of manufacturing foamed thermoplastic resins

Country Status (10)

Country Link
JP (1) JPS49110760A (en)
AU (1) AU472572B2 (en)
BE (1) BE800611A (en)
CA (1) CA1031126A (en)
DE (1) DE2329449A1 (en)
ES (1) ES415612A1 (en)
FR (1) FR2218988B1 (en)
GB (1) GB1439805A (en)
IT (1) IT988230B (en)
NL (1) NL7307923A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2288143A (en) * 1994-03-24 1995-10-11 Anglian Windows Ltd Plastics extrusions and method of extrusion thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4454082A (en) * 1982-09-24 1984-06-12 U.C. Industries Method and apparatus for monitoring the thickness of a foamed extrudate in an environmental control chamber downstream of an extrusion die
DE3401438C2 (en) * 1984-01-17 1996-10-17 Koemmerling Kunststoff Process for producing an integral foam body
DE10057365A1 (en) * 2000-11-18 2002-05-23 Bayerische Motoren Werke Ag Long fiber injection process for molding a fiber reinforced plastic sandwich structure, involves surrounding an intermediate core layer with LFI material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2288143A (en) * 1994-03-24 1995-10-11 Anglian Windows Ltd Plastics extrusions and method of extrusion thereof

Also Published As

Publication number Publication date
AU472572B2 (en) 1976-05-27
FR2218988A1 (en) 1974-09-20
DE2329449A1 (en) 1974-08-29
NL7307923A (en) 1974-08-27
AU5660573A (en) 1974-12-12
FR2218988B1 (en) 1977-07-29
IT988230B (en) 1975-04-10
CA1031126A (en) 1978-05-16
BE800611A (en) 1973-10-01
ES415612A1 (en) 1976-02-01
JPS49110760A (en) 1974-10-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee