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Abstract

An improved coversheet material for use in multi-layer boards. The improvement comprises a layer of continuous filament and a layer of fibrous web. The fibrous web is a blend of thermoplastic fibers. The thermoplastic fibers are high melt point fibers and low melt point fibers. The layer of continuous filament and the layer of fibrous web are bonded together by passing the layers between a pair of heated rolls which are under pressure. As the heat from the rolls melts the low melt point fibers, the pressure exerted on the rolls puts the melted fibers into contact with the high melt point fibers and the layer of continuous filament. As the melted fibers cool they secure themselves, the high point fibers and the continuous filament layer together to form an integral structure. The continuous filament provide strength to the coversheet material while the high melt point fibers in the fibrous web provide compatability with core materials used in a multi-layered board. This compatability permits the high melt point fibers to bond to the core material.

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First Claim