| 摘要 |
PURPOSE:To improve impact resilience, abrasion resistance, and adhesive strength by forming an abrasive with a composite polymer consisting of a polyester-series synthetic fiber web, water-repellent polyester resin, and polyurethane resin. CONSTITUTION:A web made of polyester-series synthetic fibers 6 is tentatively fixed with polyester resin 7 to form an unwoven fabric mat. This tentatively fixed mat is used as a substrate, the surface of fibers constituting this substrate is coated with polyurethane resin 8 to form a make-coat layer, which is further coated with thermosetting resin such as phenol containing abrasive grains 3 to form a size coat layer 9, and abrasive grains 3 are stuck on polyurethane resin 8 to form a desired unwoven fabric abrasive made of polyester. In this case, the boundary between polyester resin 7 and polyurethane resin 8 is firmly stuck by urethane bonding, furthermore, polyester-series synthetic fibers 6 and polyester resin are directly stuck to form a firm adhesive section, thus improving the impact resilience, abrasion resistance, and adhesive strength of the abrasive. |
