GB1001914A - Improvements in or relating to the production of expanded thermoplastic material - Google Patents

Improvements in or relating to the production of expanded thermoplastic material

Info

Publication number
GB1001914A
GB1001914A GB1245664A GB1245664A GB1001914A GB 1001914 A GB1001914 A GB 1001914A GB 1245664 A GB1245664 A GB 1245664A GB 1245664 A GB1245664 A GB 1245664A GB 1001914 A GB1001914 A GB 1001914A
Authority
GB
United Kingdom
Prior art keywords
thermoplastic material
mixing
expanded
expanding
chamber
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
GB1245664A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1001914A publication Critical patent/GB1001914A/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
    • B29C44/461—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length dispensing apparatus, e.g. dispensing foaming resin over the whole width of the moving surface
    • 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
    • B29C44/3442—Mixing, kneading or conveying the foamable 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

A method of producing expanded thermoplastic material comprises heating thermoplastic material to a temperature at which it is plastic but not liquid, adding an expanding agent thereto before, during or after said heating operation, mixing the said materials in a mixing device without the application of external heat and passing the mixed materials out of the device, in which mixing occurred, at such a temperature that rapid solidification accompanies the expansion of the expanding medium, to produce a stable expanded structure. The degree of expansion can be adjusted by altering the pressure on the thermoplastic material as it is released from the mixing device. Apparatus for producing the expanded material comprises a warming device for the thermoplastic material, a mixing chamber with a mixing rotor, means for moving the material from the warming device into the mixing chamber and means for supplying an expanding medium to the said chamber. The thermoplastic material may be polyethylene, polypropylene or a polyamide and the expanding agent may be helium, nitrogen, hydrogen, air or a gas-liberating material such as ammonium carbonate.
GB1245664A 1963-04-02 1964-03-24 Improvements in or relating to the production of expanded thermoplastic material Expired GB1001914A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH420263A CH408400A (en) 1963-04-02 1963-04-02 Method and device for the production of a lightweight plastic material with a cell structure

Publications (1)

Publication Number Publication Date
GB1001914A true GB1001914A (en) 1965-08-18

Family

ID=4271693

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1245664A Expired GB1001914A (en) 1963-04-02 1964-03-24 Improvements in or relating to the production of expanded thermoplastic material

Country Status (9)

Country Link
AT (1) AT290109B (en)
BE (1) BE645555A (en)
CH (1) CH408400A (en)
DE (1) DE1504211B2 (en)
DK (1) DK106246C (en)
ES (1) ES298188A1 (en)
FI (1) FI44290B (en)
GB (1) GB1001914A (en)
NL (1) NL6403468A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1255066A (en) * 1985-10-02 1989-06-06 Robert J. Huddleston Method and apparatus for foaming high viscosity polymer materials

Also Published As

Publication number Publication date
BE645555A (en) 1964-07-16
AT290109B (en) 1971-05-25
CH408400A (en) 1966-02-28
DE1504211B2 (en) 1971-04-08
ES298188A1 (en) 1964-10-16
DK106246C (en) 1967-01-09
FI44290B (en) 1971-06-30
NL6403468A (en) 1964-10-05
DE1504211A1 (en) 1969-10-09

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