For plastic products such as automobiles, household appliances, toys, mobile phones, cosmetics packaging, leather, etc., coating is generally used to treat the surface of plastic products. So as to achieve UV resistance, acid and alkali resistance, high matt, high hardness, scratch resistance, skin texture, high gloss and other effects. However, there are many problems when using paint to treat the surface of injection molded parts, such as environmental protection, transportation, and processing costs.

In order to solve these problems and achieve the goal of reducing the cost of plastic parts, processing environmental protection and using environmental protection, there are initial innovative products in the industry that can achieve the "beautiful" appearance required for painting without spraying and can be directly molded by injection molding. However, due to the bottleneck of raw materials and technology, it is difficult to make a variety of effects to meet the market demand. High gloss free spraying, pearlescent effect, metallic texture effect, matte effect and skin texture effect are all difficulties.

The printing, bronzing, film covering, transfer printing and other processes can achieve spray free effect and solve some difficulties, but can not solve the basic problems such as cost and environmental protection, so it can not be called a spray free material, but a spray free process.

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