PU (polyurethane) composite leather with 3D effect and preparation method of PU composite leather

Abstract

The invention discloses PU (polyurethane) composite leather with a 3D effect. The leather successively comprises a 3D basal layer, a PU composite layer and a finishing layer, a bonding agent layer isarranged between the 3D basal layer and the PU composite layer, a solvent-free PU bonding agent serves as the raw material of the bonding agent layer, the finishing layer is a waterborne finishing layer, the PU composite layer comprises a PU monolayer and a high solid layer, and the PU monolayer is prepared from the following raw materials in parts by weight: 95-105 parts of PU resin, 62-70 partsof DMF (dimethyl formamide), 13-16 parts of acetic ether and 7.5-9 parts of color paste; the high solid layer is prepared from the following raw materials in parts by weight: 95-105 parts of high solid resin, 6-7.5 parts of cross-linking agent, 2.5-4 parts of propylene glycol methyl ether acetate, 12-16 parts of fire retardant, 0.55-0.7 part of flatting agent, 0.25-15 parts of color paste and 0.6-1 part of foaming agent. According to the PU composite leather with the 3D effect and the preparation method of the PU composite leather, base cloth is removed compared with previous PU composite materials, the materials are lighter, and the supporting performance is strong; before the process of automotive trim forming, the process in which PU leather is combined with 3D is left out, and the costis reduced when the PU composite leather has a prominent 3D effect.

Description

technical field [0001] The invention relates to the field of artificial leather, in particular to a 3D-effect PU composite leather and a preparation method thereof. Background technique [0002] The special performance and feel of leather make it synonymous with "high-end" in the decoration of bags, clothing, shoes, vehicles and furniture, and has been fully affirmed by the market. Many, incalculable. Due to the long production cycle and limited quantity of natural leather, artificial leather has become its substitute, and there are many types of artificial leather, and high-grade artificial leather is even more expensive than genuine leather. [0003] PU artificial leather is the epidermis of polyurethane composition, which is suitable for various decorations instead of genuine leather, with good shaping effect and bright surface. The manufacture of general PU leather includes base fabric treatment, rubber preparation, coating, lamination, surface treatment, coiling and o...

AI Technical Summary

Problems solved by technology

However, the current process is before the molding process of the car interior, and the base fabric is heavy; there is a process of PU leather compounding 3D, which is not conducive to the weight reduction design of the car, which is more complicated and cannot guarantee the quality

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