| 摘要 |
A method of making an abrading sheet material preferably comprises knitting a ground structure comprising a polyester yarn and a shrinkable polyolefin yarn with laid-in looped threads of a hard material, such that the looped threads are raised from a surface of the ground structure, and shrinking the shrinkable yarn of the ground structure to grip the looped threads to lock the loops in place in the ground structure. Preferably the polyolefin yarn is heat shrinkable, and the method comprises the step of heat treating the ground structure so that the polyolefin yarn in the ground structure contracts to grip the looped threads to lock the loops in place, while simultaneously restraining the ground structure against shrinkage. The invention is also a method of making a scouring pad comprising the step of heat bonding or welding abrading sheet material as described to a backing of a suitable resilient thermoplastic material, e.g. by impulse heat welding. |
