Foamed cast acoustical material and method

Details Foamed cast acoustical material and method Foamed cast acoustical material and method

1985-01-07

1987-04-07

Anderson, Philip

Compositions

Electrolytes for electrical devices

264 453, 264 50, C08J 930, C08J 508, E04B 186

Patent

active

046559507

ABSTRACT:
A lightweight cast acoustical material requiring less drying time and energy is obtained by lightly cooking an aqueous slurry of starch, cooling it to about less than 140.degree. F., whipping air into it, adding granulated mineral wool with thorough mixing to form a foam, casting the resultant wet foamed pulp into a form and drying the formed pulp to an acoustical product. The web pulp has an about 40 weight % reduction in water content, resulting in considerable savings in drying time and energy.

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