GB2014168A - Method of densifying open-celled polyurethane material - Google Patents

Method of densifying open-celled polyurethane material

Info

Publication number
GB2014168A
GB2014168A GB7904451A GB7904451A GB2014168A GB 2014168 A GB2014168 A GB 2014168A GB 7904451 A GB7904451 A GB 7904451A GB 7904451 A GB7904451 A GB 7904451A GB 2014168 A GB2014168 A GB 2014168A
Authority
GB
United Kingdom
Prior art keywords
densifying
open
polyurethane material
celled polyurethane
mass
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.)
Granted
Application number
GB7904451A
Other versions
GB2014168B (en
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.)
FOAM CUTTING ENG
Original Assignee
FOAM CUTTING ENG
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 FOAM CUTTING ENG filed Critical FOAM CUTTING ENG
Publication of GB2014168A publication Critical patent/GB2014168A/en
Application granted granted Critical
Publication of GB2014168B publication Critical patent/GB2014168B/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
    • B29C44/56—After-treatment of articles, e.g. for altering the shape
    • B29C44/5627—After-treatment of articles, e.g. for altering the shape by mechanical deformation, e.g. crushing, embossing, stretching
    • B29C44/5636—After-treatment of articles, e.g. for altering the shape by mechanical deformation, e.g. crushing, embossing, stretching with the addition of heat

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

A method of densifying open- celled polyurethane foam is provided in which heated air is circulated through a mass of the foam so as to raise the temperature of the mass to between about 385 DEG F. and 450 DEG F. (195 DEG C. and 235 DEG C.), the mass is then compressed to a desired thickness while its temperature remains between 385 DEG F. and 450 DEG F. and it is then immediately permitted to cool.
GB7904451A 1978-02-10 1979-02-08 Method of desifying open-celled polyurethane material Expired GB2014168B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87673678A 1978-02-10 1978-02-10

Publications (2)

Publication Number Publication Date
GB2014168A true GB2014168A (en) 1979-08-22
GB2014168B GB2014168B (en) 1982-07-21

Family

ID=25368461

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7904451A Expired GB2014168B (en) 1978-02-10 1979-02-08 Method of desifying open-celled polyurethane material

Country Status (3)

Country Link
JP (1) JPS54163969A (en)
DE (1) DE2904943C2 (en)
GB (1) GB2014168B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0124095A2 (en) * 1983-04-27 1984-11-07 Sekisui Kagaku Kogyo Kabushiki Kaisha Process and apparatus for producing thermoplastic resin foam
US5171756A (en) * 1991-07-31 1992-12-15 Crain Industries, Inc. Three stage cooling of porous materials
US5401448A (en) * 1989-06-02 1995-03-28 Vertifoam International Limited Controlled cooling of porous materials
US5702652A (en) * 1990-05-31 1997-12-30 Crain Industries, Inc. Controlled cooling of porous materials

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4260575A (en) * 1979-11-05 1981-04-07 Koss Corporation Method for molding ear cushions
JPS5695976A (en) * 1979-12-28 1981-08-03 Toray Silicone Co Ltd Application of two_component silicone sealant
DE4041864A1 (en) * 1990-12-27 1992-07-02 Helmut Pelzer Reutilisation of thermoplastic polyurethane foam components - by heat compressing filled components below decomposition temp.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3475525A (en) * 1966-09-22 1969-10-28 Timothy V Peters Process of reticulating polyurethane foams
US3577519A (en) * 1968-11-29 1971-05-04 Olin Mathieson Process for controlling the amount of densification in polyurethane foams and products produced thereby

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0124095A2 (en) * 1983-04-27 1984-11-07 Sekisui Kagaku Kogyo Kabushiki Kaisha Process and apparatus for producing thermoplastic resin foam
EP0124095A3 (en) * 1983-04-27 1987-08-19 Sekisui Kagaku Kogyo Kabushiki Kaisha Process and apparatus for producing thermoplastic resin foam
US5401448A (en) * 1989-06-02 1995-03-28 Vertifoam International Limited Controlled cooling of porous materials
US5702652A (en) * 1990-05-31 1997-12-30 Crain Industries, Inc. Controlled cooling of porous materials
US5171756A (en) * 1991-07-31 1992-12-15 Crain Industries, Inc. Three stage cooling of porous materials

Also Published As

Publication number Publication date
DE2904943C2 (en) 1987-04-09
DE2904943A1 (en) 1979-08-16
GB2014168B (en) 1982-07-21
JPS54163969A (en) 1979-12-27

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Legal Events

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