Single-sided matte polyester film and preparation method thereof

Abstract

The invention discloses a single-sided matte polyester film. The single-sided matte polyester film is provided with a co-extruded double-layer structure formed by compounding a matte film layer and a base film layer, wherein the matte film layer is prepared from 10%-100% of polyester masterbatch containing an additive and the balance of polyester base materials, wherein the content of the additive in the polyester masterbatch accounts for 6%-10% of the total mass of the polyester masterbatch, and the glossiness of the matte film layer is smaller than 80%. According to the single-sided matte polyester film, on the basis of good physical and mechanical performance, the available variety of the base film layer, including a white layer, a high-brightness layer, a colored layer, a heat seal layer and an ordinary polyester layer, is expanded by optimizing the matte film layer and the preparation process for double-layer co-extruding forming of the matte film layer and the base film layer, so that the application range of the single-sided matte polyester film is wide.

Description

technical field [0001] The invention relates to the field of polyester films, in particular to a single-sided matte polyester film and a preparation method thereof. Background technique [0002] Polyester film has a wide range of applications. With the rapid development of related technologies, matte polyester film has a hazy and artistic quality due to its unique low gloss, and has high haze, good aluminum plating and printing performance And other characteristics, won people's favor. Single-sided matte film has low gloss because one side is matte layer, which can achieve the effect of ordinary matte film, while the other side layer is transparent layer. Customers can carry out subsequent processing on this surface layer to achieve Some special use effects, so the variety of surface types can make customers more selective and further expand the application range. [0003] In the prior art, there have been many researches and developments on matte polyester films, most of ...

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Problems solved by technology

[0004] Chinese patent 201110353645.X discloses a method for preparing a matte polyester film. The polyester film prepared in this patent is a double-sided matte polyester film, and the film thickness is only in the range of 20-100 μm, and its application range is single , not widely available

[0005] Chinese patent 200410016500.0 discloses a polyester film with at least one matt surface and its production method. Although the patent uses co-extrusion to make the matte surface A layer realize the function diversification through the composite surface C layer, it needs to have The middle B layer is used as the connection layer, which needs to be prepared by three screw extruders, the process is complicated, and its product application range is limited to the packaging field

[0006] Chinese patent 200810015273.8 discloses a single-sided matte polyester film and its preparation method. The matte layer in this patent achieves a matte effect by adding nylon polymers. Influence of Nylon 66 Blends on Crystallization Behavior and Mechanical Properties" This document shows that due to the poor compatibility of nylon and PET, PET is easy to become brittle, which affects the production yield and increases production costs.

In addition, the patent's second film layer is limited to high transparency layer, which must use coating or corona treatment, which will increase the surface tension and roughness of the second film layer, thereby affecting the final product performance

[0007] There is still no ideal single-sided matte polyester film on the market, which has excellent matte effect and mechanical properties at the same time, and has a wide range of applications, simple preparation process, and is conducive to large-scale production

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