Extinction film or diaphragm and preparation method for same

Abstract

The invention discloses an extinction film or diaphragm. The extinction film or diaphragm is formed by a framework agent and a sensitizer, and the content of a polyvinyl chloride cross-linked gel in the extinction film or diaphragm is controlled to be 15-85% after electron ray irradiation; the content of the polyvinyl chloride cross-linked gel in the extinction film or diaphragm presents a gradient change; and the framework agent is polyvinyl chloride resin having a polymerization degree of 500-2800, and the sensitizer is a polyfunctional unsaturated monomer. Correspondingly, the invention further discloses a preparation method for the extinction film or diaphragm. The preparation method comprises the following steps of: performing embossing forming on the primarily-formed film or diaphragm via an embossing roll; and then performing the electron ray irradiation of an electron accelerator. With the adoption of the preparation method disclosed by the invention, the extinction film or diaphragm is excellent in extinction property, low in glossiness, high in haze, good in diffuse reflection extinction effect, excellent in texture heat-resistant retainability, simple in processing technique, low in energy consumption, high in yield, pollution-free, and wider in industrial application prospect.

Description

technical field [0001] The invention relates to the technical field of polyvinyl chloride film or diaphragm, in particular to a matting film or diaphragm and a preparation method thereof. Background technique [0002] With the change of people's aesthetic concepts, the requirements for decorative materials are constantly updated, and the surface characteristics of decorative materials are diverse. The matting film is a plastic product with low gloss and high haze and diffuse reflection matting effect. It has vivid colors when printing. At the same time, since the decorative material may be heated during the secondary processing or may be exposed to various heat sources during use, there are requirements for the heat resistance and retention of the texture of the matte film. Matting films or diaphragms are new varieties developed to meet these requirements. [0003] The mechanism of poor heat resistance and retention of texture: the viscosity of thermoplastic materials d...

AI Technical Summary

Problems solved by technology

[0007] However, there are many factors that affect the matting performance of PVC products, such as the inherent quality of the matting resin itself, the ratio of the processing formula and the process.

By adding matting resin, if the gel content in the matting resin is too low, there will be too few uneven parts in the product, and the effect on the surface of the product will be small, resulting in insufficient matting performance of the product

However, with the increase of the gel content, the surface of the product is more and more affected by the gel structure, and generally the addition of 20-50% of the matting resin can achieve the matting effect, but the viscosity of the system will increase with With the increase of the added amount, the processing is difficult

Moreover, matting resin is a special resin, and its price is extremely expensive compared with conventional resins. As the amount added increases, it will cause processing difficulties and increase costs.

Therefore, the heat resistance of the PVC matt film prepared by the above method is still not enough, and it is easy to increase the glossiness or disappear the pattern due to high temperature, that is, the heat resistance of the texture is poor.

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