B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
18/674
B29D 27/00 (1980.01)
Patent
CA 1090966
Abstract of the Disclosure A process-for producing foam-shaped pieces having a poreless and smooth surface from particulate expandable styrene polymer which comprises the steps of heating not prefoamed particles of expandable styrene polymer to a temperature between 100 and 170°C. under a pressure of between 3 and 30 bar to cause melting of the polymer, cooling the melt polymer to temperatures of about 10 to 40°C. above the softening point of the styrene polymer, en- larging the capacity of the mold in which the particles are melted, expanding the resulting mold melt material without supplementary external delivery of heat and thereafter cooling the mold to about ambient temperature followed by removal of the shaped foamed piece.
256575
Bollmann Werner
Mollenbruck Wilhelm
Chemische Werke Huls Aktiengesellschaft
Fetherstonhaugh & Co.
LandOfFree
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