| 摘要 |
PURPOSE: To obtain a grained synthetic leather having unique steric surface appearance and high softness and wearing durability by laminating a resin layer having embossed surface to a nonwoven fabric having uneven surface. CONSTITUTION: A spun bonded nylon nonwoven fabric is impregnated with 5-20wt.% (based on the constituent fiber of the fabric) of a urethane-based elastic polymer solution and subjected to hot embossing treatment to form an uneven surface on the nonwoven fabric. Separately, a resin liquid composed of a polyurethane resin, a pigment and a solvent is applied to a releasing paper with a roll coater and dried to form a surface skin layer having a thickness of 10-100μm, preferably 15-80μm. The surface skin layer is further coated with an adhesive liquid composed of a polyurethane, a crosslinking agent, a crosslinking accelerator and a solvent, dried, laminated to the above nonwoven fabric having an uneven surface, integrated to the fabric by pressing with a hot roll, aged for a day and peeled off from the releasing paper. The separated nonwoven fabric is dried under free tension to allow the shrinkage of the fabric and obtain the objective grained synthetic leather having an uneven surface resin layer embossed at an embossing ratio of 70-100%.
|
