CH609074A5 - Process for the manufacture of polyethylene foam - Google Patents

Process for the manufacture of polyethylene foam

Info

Publication number
CH609074A5
CH609074A5 CH1209675A CH1209675A CH609074A5 CH 609074 A5 CH609074 A5 CH 609074A5 CH 1209675 A CH1209675 A CH 1209675A CH 1209675 A CH1209675 A CH 1209675A CH 609074 A5 CH609074 A5 CH 609074A5
Authority
CH
Switzerland
Prior art keywords
crosslinking
manufacture
extruder
polyethylene foam
resin
Prior art date
Application number
CH1209675A
Inventor
Tony Kawam
Original Assignee
Dupont S T
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 Dupont S T filed Critical Dupont S T
Publication of CH609074A5 publication Critical patent/CH609074A5/en

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
    • C08J9/04—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
    • C08J9/06—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 by a chemical blowing agent
    • C08J9/10—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 by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • 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
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene

Landscapes

  • Chemical & Material Sciences (AREA)
  • General 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)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The crosslinking and the expansion of the polyethylene resin take place in the actual body of an extruder, before the extrusion; the mixture to be extruded comprising the resin, a blowing agent and an organic peroxide is first of all melted in the extruder and then diluted with the solvent before the crosslinking heat treatment is performed, the duration of which is at least equal to one half of the half-life and preferably of one to two half-lives of the peroxide employed, at the temperature chosen for the crosslinking. This process applies preferably to the manufacture of lightly crosslinked polyethylene foams of low density.
CH1209675A 1974-09-19 1975-09-18 Process for the manufacture of polyethylene foam CH609074A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7431669A FR2285421A1 (en) 1974-09-19 1974-09-19 JOINT PROCESS FOR CROSS-LINKING, EXPANSION AND EXTRUSION OF POLYETHYLENE FOAM

Publications (1)

Publication Number Publication Date
CH609074A5 true CH609074A5 (en) 1979-02-15

Family

ID=9143246

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1209675A CH609074A5 (en) 1974-09-19 1975-09-18 Process for the manufacture of polyethylene foam

Country Status (10)

Country Link
AT (1) AT346602B (en)
BE (1) BE833641A (en)
BR (1) BR7506035A (en)
CH (1) CH609074A5 (en)
DE (1) DE2541273A1 (en)
ES (1) ES441110A1 (en)
FR (1) FR2285421A1 (en)
GB (1) GB1507328A (en)
IT (1) IT1047417B (en)
NL (1) NL7511129A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2134527B (en) * 1983-02-04 1986-03-12 Smith H R Cross-linked foamed thermoplastics
US4714716A (en) * 1984-11-16 1987-12-22 The Dow Chemical Company Lightly crosslinked linear olefinic polymer foams and process for making
US4605682A (en) * 1985-02-04 1986-08-12 The Dow Chemical Company Lightly crosslinked polyethylene polystyrene blend foams and process for making

Also Published As

Publication number Publication date
FR2285421A1 (en) 1976-04-16
ATA717775A (en) 1978-03-15
BR7506035A (en) 1976-08-03
AT346602B (en) 1978-11-27
DE2541273A1 (en) 1976-04-08
NL7511129A (en) 1976-03-23
ES441110A1 (en) 1977-03-16
BE833641A (en) 1976-01-16
GB1507328A (en) 1978-04-12
IT1047417B (en) 1980-09-10
FR2285421B1 (en) 1976-12-31

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Legal Events

Date Code Title Description
PL Patent ceased