About Coated Abrasives
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Backings
Cloth, resin fiber, paper, and a combination of these materials are the most popular backings used in the manufacturing of coated abrasives.
CLOTH includes "J", "X", and "Y" weights. "J" weight (jeans) cloth is used for polishing and finishing operations or where flexible products are required. "X" weight (drills) is a heavier, stronger and less flexible material that is used in heavy and medium duty operations. "Y" weight (sateen) is an extra heavy backing for heavy duty grinding.
RESIN FIBER backings consist of multiple bonded layers of impregnated paper. They are tough and strong for disc uses.
PAPER is used in "A", "C", "D", "E", and "F" weights. "A" weight is light and flexible. "C" and "D" weights are stronger and less flexible. "E" and "F" weights are still stronger mostly for rolls, belts, and discs where high resistance to tearing is required.
COMBINATION backing is a result of laminating "E" weight paper and light cloth. This is primarily for disc and drum sanding.