CA1120223A - Method of densifying open-celled polyurethane material - Google Patents

Method of densifying open-celled polyurethane material

Info

Publication number
CA1120223A
CA1120223A CA000341845A CA341845A CA1120223A CA 1120223 A CA1120223 A CA 1120223A CA 000341845 A CA000341845 A CA 000341845A CA 341845 A CA341845 A CA 341845A CA 1120223 A CA1120223 A CA 1120223A
Authority
CA
Canada
Prior art keywords
mass
temperature
gaseous material
foam
densifying
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
CA000341845A
Other languages
English (en)
French (fr)
Inventor
Winslow L. Pettingell
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 Engineers Inc
Original Assignee
Foam Cutting Engineers Inc
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 claimed from US06/044,042 external-priority patent/US4228076A/en
Application filed by Foam Cutting Engineers Inc filed Critical Foam Cutting Engineers Inc
Application granted granted Critical
Publication of CA1120223A publication Critical patent/CA1120223A/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)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
CA000341845A 1979-05-31 1979-12-13 Method of densifying open-celled polyurethane material Expired CA1120223A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/044,042 US4228076A (en) 1978-02-10 1979-05-31 Method of densifying open-celled polyurethane material
US044,042 1979-05-31

Publications (1)

Publication Number Publication Date
CA1120223A true CA1120223A (en) 1982-03-23

Family

ID=21930208

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000341845A Expired CA1120223A (en) 1979-05-31 1979-12-13 Method of densifying open-celled polyurethane material

Country Status (3)

Country Link
CA (1) CA1120223A (de)
DE (1) DE2943859A1 (de)
GB (1) GB2050395B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357859A (en) * 1981-04-08 1982-11-09 United Technologies Corporation Pressure sensor
DE3625818A1 (de) * 1986-07-30 1988-02-04 Irbit Research & Consulting Ag Verfahren und vorrichtung zur herstellung von formteilen
AT401268B (de) * 1992-10-15 1996-07-25 Greiner & Soehne C A Schaumstoffelement, insbesondere formteil aus einer oder mehreren platten aus schaumstoff und verfahren zu seiner herstellung
DE102006032830A1 (de) * 2006-07-14 2008-01-17 Schmidt & Heinzmann Gmbh & Co. Kg Vorrichtung zum Transportieren eines Materialstrangs

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

Also Published As

Publication number Publication date
GB2050395A (en) 1981-01-07
DE2943859A1 (de) 1980-12-04
GB2050395B (en) 1983-03-16
DE2943859C2 (de) 1987-05-07

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Legal Events

Date Code Title Description
MKEX Expiry