Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having a component wherein a constituent is liquid...
Patent
1981-09-17
1983-03-29
Van Balen, William J.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having a component wherein a constituent is liquid...
156 42, 428703, B32B 324, B32B 514, B32B 1302, B28B 130
Patent
active
043784054
ABSTRACT:
A building board comprises a core 31 of set cementitious material, such as gypsum, faced on at least one side by a fabric or web 33 of mineral fibres embedded in the face of the core and a continuous film 32 of the cementitious material having a higher density and lower porosity than the core extending over the outer face of the fabric. The film may have a smooth surface or a desired textured or figured surface. The preferred fabric or web 33 is a non-woven glass fibre tissue and it is preferred that a continuous film 32 of gypsum at the surface should not exceed 2 mm in thickness. The board is made by bringing the fabric or web into contact with the respective face of a layer of an aqueous slurry of gypsum plaster or other cementitious material, and vibrating the layer of slurry in contact with the fabric or web until slurry penetrates the web and the latter is completely embedded. The process can be carried out continuously by supporting the slurry between flexible belts which are vibrated by mechanical action applied to their faces remote from the slurry. Boards accordingly to the invenion can have greater strength and/or greater resistance to fire than conventional paper-faced gypsum board.
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patent: 3993822 (1976-11-01), Knauf et al.
patent: 4133928 (1979-01-01), Riley et al.
patent: 4159361 (1979-06-01), Schupack
patent: 4195110 (1980-03-01), Dierks et al.
patent: 4203788 (1980-05-01), Clear
patent: 4288263 (1981-09-01), Delcoigne et al.
patent: 4344804 (1982-08-01), Bijen et al.
patent: 4351867 (1982-09-01), Mulvey et al.
Offenlegungsschrift 2808723, DE-0S, published Sep. 6, 1979.
BPB Industries Public Limited Company of Ferguson House
Didrick Robert M.
Kurlandsky Samuel
Robinson Robert H.
Van Balen William J.
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