Process for surface treatment of foamed sheets

Details Process for surface treatment of foamed sheets Process for surface treatment of foamed sheets

1979-07-20

1982-12-21

Dawson, Robert A.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Reshaping running or indefinite-length work

156209, 156269, 156270, 156279, 1563099, 156322, 156324, 156498, 156499, 264321, 428218, 4283105, 4283142, 4283166, 428409, B29C 1700, B29D 2700

Patent

active

043648924

ABSTRACT:
A process for the continuous modification of the surface portion only of a foamed plastic web to impart high mechanical resistance with retention of air permeability and elasticity comprises preheating the web to a temperature below its melting point, passing the preheated web through the nip of a calendar and withdrawing the web from the calender under tension. The calendar comprises a pressure roller heated to a temperature above the melting point of the web and a backing roller which is not heated.

REFERENCES:
patent: 3062698 (1962-11-01), Aykanian
patent: 3205120 (1965-09-01), Flanders
patent: 3239399 (1966-03-01), King
patent: 3422172 (1969-01-01), Dekker
patent: 3582430 (1971-06-01), Benigno
patent: 3890414 (1975-06-01), Ricciardi et al.
patent: 3998683 (1976-12-01), Benton
patent: 4070435 (1978-01-01), Lewicki et al.
patent: 4091154 (1978-05-01), Hirai
patent: 4280978 (1981-07-01), Dannheim et al.

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