The invention provides waterborne
polyurethane composite leather. The waterborne
polyurethane composite leather comprises a base cloth layer, an adhesion layer, a
surface layer and a surface treatmentlayer, wherein the surface treatment layer comprises
polyurethane, a bridging agent, a
tackifier and a
smoothing agent, the
surface layer comprises polyurethane, a bridging agent, a
tackifier, a
pigment and a dissolving medium, and the adhesion layer comprises polyurethane, a hardening agent, a catalyst, a
solvent, a
flame retardant and a
pigment. The invention further provides a preparation method of the composite leather. The preparation method comprises the steps of manufacturing the
surface layer, manufacturing the adhesion layer, bonding the surface layer, the adhesion layer and the basecloth layer together, carrying out stripping, carrying out curing treatment, treating the surface layer and the like. According to the waterborne polyurethane composite leather and the preparation method thereof, the surface layer of the waterborne polyurethane composite leather can enhance
surface film formation, abrasion resistance and flexibility by improving the components of all the
layers and adopting the preparation method; and meanwhile, various strengths such as abrasion resistance, breaking property, tension and
cracking of the waterborne polyurethane composite leather are enhanced,and the phenomena of peeling,
cracking and the like of a product after long-term solarization are avoided.