Synthetic leather for rear cover or protective sleeve of electronic product and preparation method of synthetic leather

Abstract

The invention relates to synthetic leather for a rear cover or a protective sleeve of an electronic product and a preparation method of the synthetic leather. The synthetic leather comprises a base cloth layer, a bonding layer, a dry-method PU middle layer, a dry-method PU surface layer and a surface treatment layer which are sequentially arranged, wherein the surface treatment layer comprises a first surface treatment layer arranged on the dry-method PU surface layer and a second surface treatment layer arranged on the first surface treatment layer, raw materials of the bonding layer comprise polycarbonate high-solid resin, a first cross-linking agent, a second cross-linking agent, a filler, a solvent and a flatting agent, and in the curing process of the bonding layer, a film layer has a micro-bubble structure and not prone to produce molecular pores, so that rotten surface is prevented; moreover, a certain proportion of the filler is matched, so that a microporous structure of resin is favorably filled, a molecular structure is compact, the bubble structure of the resin is compensated, and the compactness of the film layer is good; meanwhile, the synthetic leather also has excellent wear resistance, scratch resistance, antifouling performance and the like, and can meet physical property requirements of the rear cover of a mobile phone.

Description

technical field [0001] The invention belongs to the technical field of synthetic leather, and in particular relates to a synthetic leather for a back cover or a protective case of an electronic product and a preparation method thereof. Background technique [0002] With the rapid development of my country's electronics industry, the demand for synthetic leather for back covers or protective covers of electronic products, such as mobile phone back covers or mobile phone protective covers or tablet computer protective covers, is increasingly strong. Traditional synthetic leather for electronic products is mostly made of PVC material or wet-process PU material. Regardless of whether it is PVC material or wet-process PU material, there are potential disadvantages of environmental protection, and its application is subject to certain restrictions, especially for exported electronic products. products, applications are limited. [0003] For example, Chinese patent CN104294606A di...

AI Technical Summary

Problems solved by technology

Traditional synthetic leather for electronic products is mostly made of PVC material or wet-process PU material, regardless of whether it is PVC material or wet-process PU material, there are potential disadvantages of environmental protection, and its application is subject to certain restrictions, especially for exported electronic products. product, limited application

[0003] For example, Chinese patent CN104294606A discloses a polyurethane synthetic leather for high-grade electronic packaging and certificates, which comprises a polyurethane synthetic leather base layer and a layer of colorless and transparent slurry coated on the outer surface of the polyurethane synthetic leather base layer, and then dried and cured. The synthetic leather base layer is composed of a base cloth layer, a wet-process polyurethane layer and a dry-process polyurethane layer. The colorless transparent slurry is coated on the surface of the dry-process polyurethane layer. The synthetic leather has certain antifouling properties, but there are still environmental protection problems and hand feeling. And physical properties (such as stain resistance, scratch resistance, chemical resistance, etc.) are lacking, which cannot meet the application requirements of export electronic products, and the leather for the back cover of mobile phones usually needs to meet the requirements of alcohol friction resistance, hardness rod, scratch resistance, Anti-contamination (high and low temperature), high and low temperature storage, boiling, UV96H resistance, temperature shock, cosmetics, vibration friction, rubber friction, denim friction, alkali resistance / artificial sweat, mildew and antibacterial, etc., this polyurethane synthetic leather cannot meet the requirements Use of the back cover of the mobile phone

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