Fibrous mat facer with improved strike-through resistance

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428216, 428219, 428220, 428286, 428290, 4283115, 4283166, 4283175, 4283177, 4283179, 428337, 428338, 428339, 428422, 428448, 428903, B32B 524, B32B 1710, D04H 312

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046379517

ABSTRACT:
An economical and versatile fibrous glass mat displaying improved resistance to wetting or strike-through by various curable materials when said materials are placed on one surface of said mat while in liquid state is disclosed. This mat, which is especially suited as a carrier, substrate or facer for such curable substances, comprises a blend of fibers. This blend of fibers includes a majority of base fibers having a mean diameter in the range of ten (10) microns with a minor amount of microfibers. The binder formulation, which when cured holds the blend of fibers together to form a self-supporting mat, includes conventional binder resins with a minor amount of wet proofing resinous materials.
Preferably, the resulting mat has a porosity of no greater than two-hundred and twenty-five (225) cubic feet per minute per square foot of mat in accordance with the Frazier Air Permeability Test. Also, claimed is a laminate comprising this novel mat and a vinyl plastisol coating or a coating of a foam insulation material such as a polyurethane or polyisocyanurate foam.

REFERENCES:
patent: 4186236 (1980-01-01), Heitmann
patent: 4388366 (1983-06-01), Rosata et al.
patent: 4508775 (1985-04-01), Adiletta

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