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US 4,698,258 AGranted
Surface covering product and process therefor
OwnerJoseph C. Harkins, Jr.inventor
Life of this patent
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OwnerJoseph C. Harkins, Jr.inventor
Estimating the term…
A base web is prepared which has two parallel layers of nonwoven fiber glass webs, each impregnated with a solidified resinous composition and separated from each other by a core layer of an expandable solidified resinous composition which is bonded to the resinous composition used to impregnate the fiber glass webs by a thin integral layer of nonexpandable resinous composition. Additional layers of resinous material, expandable and nonexpandable, and decorative effects may be supported by the base web. The composite web is subjected to heat processing to expand the core layer and other expandable layers that may be present and to fuse the resinous composition used in the construction of the product. The processes are particularly adaptable for the production of shapes such as floor tiles and decorations that employ chemical embossing.
A base web for a surface covering product comprising two substantially parallel fiber glass webs each of which is impregnated with a resinous composition and spaced apart from the other by a core layer of expandable resinous composition and an integral layer of resinous composition positioned on each side of the core layer which separates the surfaces of the core layer from the impregnated fiber glass webs and adheres the impregnated fiber glass webs to the core layer.
A process for producing a base web for a surface covering product which comprises:
Dependencies are inferred from the claim text.