Flexible backing material for use in coated abrasives

Details Flexible backing material for use in coated abrasives Flexible backing material for use in coated abrasives

C - Chemistry, Metallurgy

08

J

57/7

C08J 5/14 (2006.01) B24D 3/00 (2006.01) B24D 3/28 (2006.01) B24D 11/02 (2006.01) D06N 7/00 (2006.01)

Patent

CA 1212844

FLEXIBLE ?CKING MATERIAL FOR USE ?? OATED ABRASIVES Abstract A flexible sheet material particularly suitable as a backing for coated abrasive products and method of making same are described. The flexible sheet material is of that type employing a straight warp fabric. The yarns of the straight warp fabric are coated and at least partially impregnated with a flexible polymeric material, such as polyvinyl alcohol, having thereover an intermediate filling coat of a phenol formaldehyde resin/latex and an outer filling coat of phenol formaldehyde resin. Alternatively, the straight warp fabric includes a penetrating base coating of flexible polymeric material and thereover a back- filling including approximately equal parts by weight of calcium carbonate and magnesium carbonate dispersed in a flexible synthe- tic polymeric resin which backfilling fills the interstices and encapsulates the yarns of one of the yarn arrays that form the straight warp fabric. The straight warp fabric may include a non-woven web located between adjacent arrays of warp and weft yarns. The flexible sheet material described herein may be thereafter coated in conventional manner with abrasive grains to form a coated abrasive sheet material that is particularly suitable for use in the formation of endless abrasive belts.

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