Shrunken foamed thermoplastic resin sheet and its method of prep

Details Shrunken foamed thermoplastic resin sheet and its method of prep Shrunken foamed thermoplastic resin sheet and its method of prep

1977-11-11

1979-03-27

Anderson, Philip

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

264 54, 264230, 264242R, 264DIG8, 264DIG18, 264DIG47, 521 79, 521143, B29D 2700

Patent

active

041464516

ABSTRACT:
A non-woven rug, or the like, is formed by heat sealing a covering material at spaced intervals to a plastic backing and thereafter shrinking the backing to bulk the facing fabric. The heat sealing of the facing fabric to the backing causes a partial loss of orientation in the seal area therein bringing about a bulking or crinkling of the backing. The backing is preferably of a thermoplastic material having a foaming agent incorporated therein which is foamed after the completion of the heat sealing and heat shrinking procedures. Also included in the disclosure are the features of the backing fabric independently, i.e., incorporation of a foaming agent into a plastic which is extruded and thereafter heat sealed and/or stretch oriented and shrunk prior to the activation of the foaming agent to foam the fabric.

REFERENCES:
patent: 3300366 (1967-01-01), Krolik
patent: 3339006 (1967-08-01), Collins
patent: 3403203 (1968-09-01), Schirmer
patent: 3639199 (1972-02-01), Brandts et al.
patent: 3755062 (1973-08-01), Schirmer
patent: 3959051 (1976-05-01), Schirmer

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