Method for the manufacture of a foamable thermoplastic resin sti

Details Method for the manufacture of a foamable thermoplastic resin sti Method for the manufacture of a foamable thermoplastic resin sti

1979-03-05

1981-04-14

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264151, 2642102, 264284, 425155, 425291, 425304, 425308, B29D 2700

Patent

active

042619408

ABSTRACT:
Sticks of foamable thermoplastic material are provided with grooves in at least one surface. These grooves extend width-wise of the stick. In addition, the grooves are disposed in equi-spaced relation along one surface of the stick, or in spaced-apart series or groups on only one surface, or in series or groups on opposite surfaces and in spaced-apart relation. Upon foaming, the sticks form foamed elements of various shapes, each of which has at least one curvilinear portion such as, for example, a corkscrew shape, an annular shape or shapes with reverse bends.

REFERENCES:
patent: 2895170 (1959-07-01), Carlile
patent: 3188264 (1965-06-01), Holden
patent: 3481455 (1969-12-01), Graham et al.
patent: 3723237 (1973-03-01), Fuss
patent: 3723240 (1973-03-01), Skochdopole et al.
patent: 3932569 (1976-01-01), Fuss
patent: 4027064 (1977-03-01), Bussey
patent: 4033395 (1977-07-01), Berg et al.

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