Process for stiffening hats

Details Process for stiffening hats Process for stiffening hats

1994-05-04

1996-06-04

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With printing or coating of workpiece

Coating or impregnating workpiece before molding or shaping...

21759, 26433118, B29C 7012

Patent

active

055230393

ABSTRACT:
In the manufacture of hats, the shellac stiffening agent typically used for imparting extra stiffness to the final hat product is replaced with an aqueous acrylic or acrylic/styrene emulsion or dispersion having a pH of 4 to 7, the acrylic or methacrylic polymer or copolymer in the emulsion having an acid value of 80 to 120 mg KOH/gm and a glass transition temperature of 17.degree. to 35.degree. C.

REFERENCES:
patent: 686674 (1901-11-01), Keator
patent: 2616091 (1952-11-01), Luttge
patent: 3249667 (1966-05-01), Gregory et al.
patent: 3673611 (1972-07-01), Cain et al.
patent: 4140836 (1979-02-01), Wallace
patent: 4909915 (1990-03-01), Bederke et al.
patent: 5302459 (1994-04-01), Kim et al.
patent: 5326516 (1994-07-01), Brannon

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