Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1974-02-04
1976-05-04
Lesmes, George F.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
156306, 428337, 428342, 428442, 428537, B32B 1710, B32B 1712
Patent
active
039550311
ABSTRACT:
Building materials of the type containing an impermeable membrane, as for example, an insulation material, or a wall board, or ceiling tile are provided. The impermeable membrane is first formed upon a sheet of paper which gives structural rigidity to the membrane, and is then used as an adhesive to hold the paper onto a porous body by heating the membrane to a softened condition and pressing it against the porous body. The membrane is preferably made in two steps wherein a first application of a thermoplastic latex is put on the paper and then a second application of latex is applied to seal pores in the film produced by the first application of latex. A fire retardant i.e. either a flame retardant salt in the paper or a halogen liberating resin coating on the outside surface is provided to liberate flame extinguishing gases to be held in place by the vapor barrier. In the most preferred embodiments, a halogen containing thermoplastic resin is used as at least part of the material forming the vapor barrier and either another coating of a halogen containing resin is applied to the outside surface of the paper, or a flame retarding salt is included in the paper to produce a building material whose surface has an exceedingly low flame propagation rate.
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patent: 2961342 (1960-11-01), Snyder
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patent: 2985540 (1961-05-01), Goldbeck
patent: 3050424 (1962-08-01), Schmitt
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patent: 3745192 (1973-07-01), Wingler et al.
Fiberglas Insulation for Industry (Received Aug. 1949), pp. 3 and 10 cited.
Jones Isaac Palmer
McCartan Daniel A.
Lesmes George F.
Overman John W.
Owens-Corning Fiberglas Corporation
Pacella Patrick P.
Roche R. J.
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