Chemical method for embossing a ceramic acoustical product

Details Chemical method for embossing a ceramic acoustical product Chemical method for embossing a ceramic acoustical product

1974-11-18

1980-01-15

Arnold, Donald J.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264119, C04B 3334

Patent

active

041838866

ABSTRACT:
An acoustical board comprised of felted mineral wool and clay is embossed by applying an aqueous dispersion of lithium carbonate and borax to selected areas of the board surface, drying the coating and firing at a temperature in the range of from about 1200.degree. F. to 1600.degree. F. A prime clay coat may be provided which acts as a barrier and gives better control of board embossing.

REFERENCES:
patent: 2791020 (1957-05-01), Heine
patent: 2825420 (1958-03-01), Heine

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