Sewing-free hot melt adhesive TPU-PU leather and preparation method thereof

Abstract

The present invention provides a novel sewing-free hot melt adhesive TPU-PU leather and a preparation method thereof. The hot melt adhesive TPU-PU leather comprises a release paper, a hot melt adhesive film, a TPU film, and a dry PU film. The release paper comprises a bottom paper layer, an adhesive layer, a plastic layer, a transition layer, and a release layer; a hot melt adhesive raw material comprises polyester polyol, diisocyanate, polyether polyol, and a plurality of additives; a TPU raw material comprises polymer polybasic alcohol, 1,4-cyclohexane-diisocyanate, a chain extender, and a plurality of functional additives; and a PU raw material comprises polyester glycol, straight-chain diol, isocyanate, TDI Tripolymer, dimethylformamide, butanone, black sand, and a plurality of functional additives. According to the present invention, innovations are conducted on raw material components of the release paper, the hot melt adhesive, the TPU film, and the PU film; and the prepared sewing-free TPU-PU leather has the technical advantages of firm adhesion, durability, environmentally-friendly materials, no invisible harm to human body, and the like.

Description

technical field [0001] The invention relates to the technical field of leather materials, in particular to a sewing-free hot-melt adhesive TPU-PU leather and a preparation method thereof. Background technique [0002] In the prior art, in the production industries of garments, shoes, bags, handbags, seats, military industry, etc. at home and abroad, the fabrics attached to all products are all spliced ​​by traditional stitching methods. This production method not only has high labor intensity and high production cost, but also has problems such as easy fracture, tearing and peeling at the seam of the product under the action of external force, which seriously affects the service life and quality of the product, and the consumption cost is also significantly increased. Also because most of the current product fabrics are made of PVC leather, and the PVC material itself contains toxic elements such as polyvinyl chloride and ethylhexylamine, which is carcinogenic to the human b...

AI Technical Summary

Problems solved by technology

This production method not only has high labor intensity and high production cost, but also has problems such as easy breakage, tearing and peeling at the seam of the product under the action of external force, which seriously affects the service life and quality of the product, and the consumption cost is also significantly increased.

Also because most of the current product fabrics are made of PVC leather, and the PVC material itself contains toxic elements such as polyvinyl chloride and ethylhexylamine, which is carcinogenic to the human body and is extremely unsafe to use. Most of the glue used in the pasting is industrial liquid glue and solid glue. Most of these melt glue materials are toxic, and they have good properties such as elasticity, acid resistance, alkali resistance, washing resistance, dry cleaning resistance, tension resistance, and adhesion. It has certain defects and is not an ideal environmental protection adhesive material.

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