| 摘要 |
Flexible coated abrasives with facile straight tear in either the length or cross directions can be made on stitch bonded fabric backings having (1) an aral density between 51 and 153 gm/m2, (2) a tensile strength in the length direction between 5.4 and 12.6 kN/m of width, (3) a tensile strength in the cross direction which is between 5.4 and 11.7 kN/m of length and is between 0.9 and 1.35 times as great as the length direction tensile strength, (4) an elongation to break in the length direction of not more than 40%, and (5) an elongation to break in the cross direction of not more than 35%. The fabric is prepared for coating by saturation with at least its own weight of a finishing adhesive composed primarily of latices of acrylic homopolymers, acrylic copolymers, butadienestyrene polymers, or mixtures of these types. Conventional making, grit coating, and sizing are then performed to yield a coated abrasive with a ratio of length direction tensile modulus to cross direction tensile modulus within the range of 0.8 to 1.8.
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