Continuous process for the production of polystyrene foamed...

Details Continuous process for the production of polystyrene foamed... Continuous process for the production of polystyrene foamed...

B - Operations, Transporting

29

D

18/663

B29D 27/00 (1980.01)

Patent

CA 1174414

ABSTRACT OF THE DISCLOSURE This invention relates to a process for producing economically, shaped articles of polystyrene foam with a small wall thickness and sufficient strength by a conti- nuous simple operation including a short forming cycle in which the sheet of polystyrene foam having a bulk density of 0.15 to 0.7 g/cm3, a thickness of 0.3 to 1.0 mm, 5 to 20 cell membranes widthwise of the sheet and a draw ratio of up to 1.25 and containing 0.03 to 0.3 mole/kg of the residual gas of the blowing agent is formed by an extruder and utilized to produce the shaped article.

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