FI925915A - Polyolefin foam web sheets - Google Patents
Polyolefin foam web sheets Download PDFInfo
- Publication number
- FI925915A FI925915A FI925915A FI925915A FI925915A FI 925915 A FI925915 A FI 925915A FI 925915 A FI925915 A FI 925915A FI 925915 A FI925915 A FI 925915A FI 925915 A FI925915 A FI 925915A
- Authority
- FI
- Finland
- Prior art keywords
- foam plastic
- extrusion
- manufacture
- plastic boards
- forming agent
- Prior art date
Links
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention relates to web-shaped foam plastic boards from polyolefins, the boards being manufactured from polyolefin form mass containing cell-forming agent, by extrusion, flotation and expansion of said mass, halogen- free hydrocarbons and/or CO2 being utilised as cell- forming agent by their manufacture. Without supplemental maturing, the foam plastic boards according to the invention have a cell-forming agent content immediately after their manufacture, more than 30 per cent below that of the hitherto known products manufactured in the same way. The new foam plastic boards according to the invention are characterised in that the surface of the board has been needle-perforated within three a maximum of hours after the extrusion. They have an outstanding heat stability. The manufacture of the foam plastic boards according to the invention is performed according to hitherto known methods and utilising hitherto known devices, whereby the products are additionally needle- perforated immediately after having attained their specific solidity following the extrusion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI925915A FI106367B (en) | 1992-12-29 | 1992-12-29 | Web-shaped foam plastic boards from polyolefins |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI925915A FI106367B (en) | 1992-12-29 | 1992-12-29 | Web-shaped foam plastic boards from polyolefins |
FI925915 | 1992-12-29 |
Publications (3)
Publication Number | Publication Date |
---|---|
FI925915A0 FI925915A0 (en) | 1992-12-29 |
FI925915A true FI925915A (en) | 1994-06-30 |
FI106367B FI106367B (en) | 2001-01-31 |
Family
ID=8536472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI925915A FI106367B (en) | 1992-12-29 | 1992-12-29 | Web-shaped foam plastic boards from polyolefins |
Country Status (1)
Country | Link |
---|---|
FI (1) | FI106367B (en) |
-
1992
- 1992-12-29 FI FI925915A patent/FI106367B/en active
Also Published As
Publication number | Publication date |
---|---|
FI925915A0 (en) | 1992-12-29 |
FI106367B (en) | 2001-01-31 |
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