A method for changing the glossiness of film surface

Abstract

The invention discloses a method for changing the surface glossiness of a film. In the operation steps of cast film formation, a silicone pressure roller is added in front of the active casting roller. By adjusting the air pressure, the pressure at which the silicone pressure roller and the active casting roller are attached to each other is changed, thereby changing the surface gloss of the film. The larger the value is, the lower the glossiness is; changing the distance between the silicone pressure roller and the active casting roller, the larger the distance, the greater the surface glossiness of the film. The method for changing the glossiness of the film surface in the present invention is to adjust the glossiness of the casting film through a physical adjustment method, and the pressure between the silicone pressure roller and the active casting roller and the distance between the silicone pressure roller and the active casting roller are even. It can adjust the surface gloss of the film, so as to meet the customer's demand for gloss under the condition of unchanged formula.

Description

technical field [0001] The invention belongs to the technical field of cast film preparation, and in particular relates to a method for changing the glossiness of the film surface. Background technique [0002] Cast film is a kind of non-stretched and non-directional flat extrusion film produced by melt casting and quenching. There are two ways of single-layer casting and multi-layer co-extrusion casting. The speed is fast, the output is high, and the transparency and thickness uniformity of the film are excellent. [0003] Cast film has superior heat-sealing properties and excellent transparency, and is one of the main packaging composite substrates. It is used to produce high-temperature cooking films, vacuum aluminized films, etc., and the market is extremely promising. According to different needs, it is often necessary to adjust the glossiness of the cast film to meet different needs. [0004] The gloss adjustment of cast film generally adopts formula adjustment. Prod...

AI Technical Summary

Problems solved by technology

[0004] The gloss adjustment of cast film generally adopts formula adjustment. Products with different gloss can be realized by adjusting the formula of casting liquid. However, it is troublesome to adjust the formula. Other properties of the membrane are changed, resulting in a decrease in the performance of the membrane