Extrusion of thermoplastic foam

Details Extrusion of thermoplastic foam Extrusion of thermoplastic foam

1975-03-17

1976-06-29

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Stock pressurizing means operably associated with downstream...

425461, 425817C, B29D 2700, B29F 304

Patent

active

039663817

ABSTRACT:
Thermoplastic foam plank is prepared by extrusion from a slotted die between a pair of generally parallel opposed forming plates. A substantial improvement in physical properties is obtained by using curved supports which engage the foaming gel generally adjacent the ends of the die opening and edges of the freshly extruded sheet.

REFERENCES:
patent: 2740157 (1956-04-01), McCurdy et al.
patent: 3182108 (1965-05-01), Branscum
patent: 3431164 (1969-03-01), Gilbert

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