Shoe stiffeners

Details Shoe stiffeners Shoe stiffeners

1984-04-19

1985-03-26

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428288, 428290, 428291, A43B 2316, B29C 2704

Patent

active

045073570

ABSTRACT:
Shoe stiffeners are now comprising a textile fabric impregnated with a stiffening composition. In the past certain of these have been made by impregnating textile fabric with a solution of stiffening composition. Others have been made by impregnating textiles with an aqueous emulsion of stiffening composition but these have not been as stiff or creep-resistant in wear as corresponding weights of solution impregnated materials. In the invention a plasticizer (solid at wear temperatures and melting at temperatures commonly used in activating shoe stiffeners e.g. above about 50.degree. C.) and an aminoplast resin 3 to 30% based on dry weight of composition are included in the stiffening composition. The stiffeners are sufficiently stiff and creep-resistant to be satisfactory as replacements for many solution-impregnated stiffeners and may be stuck to the upper with hot melt adhesives or latex (if primed).

REFERENCES:
patent: 4069602 (1978-01-01), Kremer et al.
patent: 4241124 (1980-12-01), Kremer et al.
Hawley, "Condensed Chemical Dictionary", 9th Ed., N.Y., Van Nostrand, p. 283.

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