DE3377118D1 - Rigid thermoplastic resin foam and process for its production - Google Patents
Rigid thermoplastic resin foam and process for its productionInfo
- 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
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.
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) |
-
1983
- 1983-07-20 DE DE8383902287T patent/DE3377118D1/en not_active Expired
- 1983-07-20 AT AT83902287T patent/ATE35239T1/en not_active IP Right Cessation
-
1985
- 1985-03-19 NO NO85851087A patent/NO168834C/en not_active IP Right Cessation
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 |