▎ 摘　　要

NOVELTY - Deep sewing coated polyurethane seat leather comprises polyurethane leather and a reinforcing cloth. The polyurethane leather comprises a surface layer, a solvent-free adhesive layer, a base cloth and a coating layer. The surface layer is arranged between the base cloth and the coating layer. The reinforced leather is arranged on the side of the base cloth away from the surface layer. The polyurethane leather and the reinforced cloth are bonded by glue and the surface layer and the base cloth are bonded by a solvent-free adhesive layer. The solvent-free adhesive layer comprises solvent-free polyurethane adhesive. The glue raw material is polyurethane glue. The surface layer comprises 95-105 pts. wt. polyurethane resin, 55-75 pts. wt. N,N-dimethylformamide and 15-25 pts. wt. ethyl acetate. USE - The leather is used in seats, door panels, instrument panels, gear shifting and other parts of automotive interiors. ADVANTAGE - The leather enables that the surface layer prepared by the polyurethane resin system has excellent air permeability and flexibility, better stability and improves the comfort of polyurethane seat leather; utilizes solvent-free polyurethane adhesive, which improves the bonding force between surface layer and base fabric; improve the stiffness of polyurethane seat leather; utilizes non-woven fabric which reduce excessive stretching of the seat leather, and can reinforce and compound the leather and improve the stiffness and reduces the wrinkle problem caused by over-stretching and deep sewing. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing deep sewing coated polyurethane seat leather comprising mixing polyurethane resin, N,N-dimethylformamide, ethyl acetate and color paste, coating on the release paper, heating, drying to obtain the surface layer, coating the solvent-free polyurethane adhesive on the surface layer to form a solvent-free adhesive layer, attaching the base cloth after heating, drying, separating the release paper to obtain primary polyurethane leather product, mixing flatting agent, brightening agent, cross-linking agent, wear-resistant agent, leveling agent, antifoaming agent and thickening agent with water, coating on the side of the primary polyurethane leather product away from the base fabric, heating, drying to form a coating layer, finally preparing polyurethane leather, applying glue to the side of the polyurethane leather close to the base fabric, attaching with reinforcing cloth, heating and drying at 120-130℃ to obtain deep sewing coated polyurethane seat leather.