DE3377118D1 - Rigid thermoplastic resin foam and process for its production - Google Patents

Rigid thermoplastic resin foam and process for its production

Info

Publication number
DE3377118D1
DE3377118D1 DE8383902287T DE3377118T DE3377118D1 DE 3377118 D1 DE3377118 D1 DE 3377118D1 DE 8383902287 T DE8383902287 T DE 8383902287T DE 3377118 T DE3377118 T DE 3377118T DE 3377118 D1 DE3377118 D1 DE 3377118D1
Authority
DE
Germany
Prior art keywords
less
thermoplastic resin
rigid thermoplastic
foamed body
expanded
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
DE8383902287T
Other languages
German (de)
Inventor
Takao Kadota
Masayuki Hashimoto
Itsuo Hamada
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.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
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 Dow Chemical Co filed Critical Dow Chemical Co
Priority claimed from PCT/JP1983/000232 external-priority patent/WO1985000553A1/en
Application granted granted Critical
Publication of DE3377118D1 publication Critical patent/DE3377118D1/en
Expired legal-status Critical Current

Links

Landscapes

  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

Foamed body which is made by foaming rigid thermoplastic resin, which has a density of 3-17 kg/m3 and a dynamic spring constant of 40 times 10 power (6) or less, and in which the minimum value of 60% compression set measured on three mutually normal axes is 25% or less, the average cell dia. is 2.0 mm or less, the independent cell ratio is 50% or more and the cell structure contains a large number of ripples the start from the boundary of three or more cells and extend towards the centre of the cell membrane. In the foamed body mfr. a rigid thermoplastic resin foamed body is expanded by heating or 1 min or more in a steam atmosphere or water at 85 deg. C or more. It is shrunk to 70% or less of the final body vol., and then is matured and expanded for 24 hrs or more in a dry chamber at a temp. of 40 deg. C or more which is less than the resin's softening pt.
DE8383902287T 1983-07-20 1983-07-20 Rigid thermoplastic resin foam and process for its production Expired DE3377118D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1983/000232 WO1985000553A1 (en) 1982-01-25 1983-07-20 Rigid thermoplastic resin foam and process for its production

Publications (1)

Publication Number Publication Date
DE3377118D1 true DE3377118D1 (en) 1988-07-28

Family

ID=13790023

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383902287T Expired DE3377118D1 (en) 1983-07-20 1983-07-20 Rigid thermoplastic resin foam and process for its production

Country Status (3)

Country Link
AT (1) ATE35239T1 (en)
DE (1) DE3377118D1 (en)
NO (1) NO168834C (en)

Also Published As

Publication number Publication date
NO851087L (en) 1985-03-19
NO168834C (en) 1992-04-08
NO168834B (en) 1991-12-30
ATE35239T1 (en) 1988-07-15

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee