Post-press embossing of a consolidated man-made board

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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156 622, 264119, 264123, B29J 504

Patent

active

040736725

ABSTRACT:
A consolidated man-made board, such as hardboard, is wetted on one surface with a chemical, such as ammonium hydroxide, and thereafter embossed with a contoured embossing plate at a pressure of at least about 1000 p.s.i., at a temperature in the range of about 400.degree.-550.degree. F. and for a period of time sufficient to permanently reshape the surface of the consolidated board. The use of chemical wetting agents including ammonium hydroxide, mineral acids including hydrochloric, sulfuric, nitric and phosphoric acids, oxalic acid, and metheneamine is disclosed.

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patent: 3788929 (1974-01-01), Huttunen
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