Polystyrene bead expansion process

Details Polystyrene bead expansion process Polystyrene bead expansion process

1987-08-19

1988-08-23

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 454, 264 466, 264 51, 521 57, 521 58, 521 60, 521915, C08J 924, B29C 3512

Patent

active

047659343

ABSTRACT:
Polystyrene beads or beads of other thermoplastic material are expanded to a consolidated foam structure in a hollow cavity of a marine float or other structure by providing the beads with a uniform coating of a saturated brine solution or other aqueous solution of water-soluble salt and exposing the solution to microwave energy to boil the solutioln and thereby heat the beads to cause expansion and fusion to a foam structure.

REFERENCES:
patent: 3878133 (1975-04-01), Rubens
patent: 4361656 (1982-11-01), Mostafa
patent: 4424286 (1984-01-01), Nakagawa et al.
patent: 4430450 (1984-02-01), Senda et al.

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