Hot melt adhesive attached with dry-type PU (polyurethane) on wet-type PU

Abstract

The invention belongs to the technical field of TPU (thermoplastic polyurethane) products and in particular relates to a TPU holt melt adhesive attached with dry-type PU (polyurethane) on wet-type PU. The TPU holt melt adhesive attached with the dry-type PU on the wet-type PU comprises a dry-type PU thin film layer and a wet-type PU thin film layer, and a TPU hot melt adhesive layer is arranged on the back of the wet-type PU thin film layer. Compared with the prior art, the TPU holt melt adhesive attached with the dry-type PU on the wet-type PU has the advantages that the dry-type PU thin film layer is compounded with the wet-type PU thin film layer by virtue of a first TPU hot melt adhesive layer, and a second TPU hot melt adhesive layer is arranged on the back of the wet-type PU thin film layer, so that the TPU holt melt adhesive attached with the dry-type PU on the wet-type PU has good hydrolysis resistance, abrasion resistance, toughness and elasticity and high thickness, also has the characteristics of soft handfeel, fullness and lightness and is beautiful in appearance. The TPU holt melt adhesive attached with the dry-type PU on the wet-type PU needs to be pasted on a knitted fabric base by virtue of the second TPU hot melt adhesive layer only when being used, can be applied to the fields of furniture, building materials, bags and the like, is simple and convenient and has good applicability.

Description

technical field [0001] The invention belongs to the technical field of TPU products, and in particular relates to a TPU hot melt adhesive pasted with wet PU and then pasted with dry PU. Background technique [0002] PU is the abbreviation of English poly urethane, and its chemical Chinese name is "polyurethane". PU synthetic leather is now widely used in the decoration of luggage, clothing, shoes, vehicles and furniture. It has been increasingly recognized by the market. Its wide application range, large quantity and variety are beyond the satisfaction of traditional natural leather. . Moreover, it has many advantages that PVC synthetic leather cannot match, and is an ideal material to replace natural leather. [0003] According to its production process, PU synthetic leather can be divided into three types: dry method, wet method and coagulation Xufu method. Among them, dry PU leather is comparable to genuine leather in terms of touch, toughness and appearance. It has fir...

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Problems solved by technology

[0003] According to its production process, PU synthetic leather can be divided into three types: dry method, wet method and coagulation Xufu method. Among them, dry PU leather is comparable to genuine leather in terms of touch, toughness and appearance. It has firm adhesion and good hydrolysis resistance. , high wear resistance, but not enough thickness; while wet-process PU leather has good moisture permeability and air permeability, generally its thickness is relatively large, so it can increase the thickness of the product and make the hand feel more plump, but wet-process PU leather is not water-resistant Solution, the surface is not wear-resistant, not suitable for the furniture field, and the thickness of dry PU leather is not enough

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