Method of making woven acoustical panel

Details Method of making woven acoustical panel Method of making woven acoustical panel

1974-05-23

1976-06-29

Gonzales, John F.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

28 76T, 156155, 156242, 181 33G, 181 33GA, 181 33H, 264317, B32B 508

Patent

active

039665224

ABSTRACT:
Acoustical panels are comprised of woven fabrics which have at least one face ply portion woven of warp and fill yarns comprising yarns of non-fugitive and fugitive material. The fabric is woven relatively densely to facilitate handling and use thereof in fabrication of the acoustical panel. The substantial disintegration of the fugitive strands of yarn at the completion of the fabrication process provides a selected porosity in the face portion of the woven fabric for controlled transmission of sound waves into the interior of the panel.
In a preferred method of making an acoustical panel, the fabric is woven of yarns comprising a mixture of non-fugitive and fugitive material. After installation of porous acoustical elements into pockets formed in the face portion and insertion of mandrels into flutes formed within the fabric, the fabric is impregnated with resin, cured, and the mandrels removed. The formed panel is then heated to a temperature sufficient to burn out the fugitive yarns without affecting the non-fugitive yarns to provide the face portion with a desired porosity to sound waves.

REFERENCES:
patent: 2607104 (1952-08-01), Foster
patent: 3132099 (1964-05-01), Eilhauer
patent: 3481427 (1969-12-01), Dobbs et al.
patent: 3502171 (1970-03-01), Cowan
patent: 3602964 (1971-09-01), Currier et al.
patent: 3690606 (1972-09-01), Pall
patent: 3756346 (1973-09-01), Parker

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