Polyester film with adhesion resisting function and preparation method of polyester film

Abstract

The invention discloses a polyester film with an adhesion resisting function. The polyester film is of a structure comprising a layer A, a layer B and a layer C, wherein the layer A and the layer C are surface layers; the layer B is a core layer; the layer A comprises the components of 65-80 percent of polyester slice for a general film and 20-30 percent of general adhesion resisting agent; the layer B comprises the components of 80-85 percent of master batch polyester slice for a functional film, 3-5 percent of general adhesion resisting master batch and 12-15 percent of high-performance adhesion resisting agent; and the layer C comprises the components of 50-65 percent of polyester slice for the general film and 35-50 percent of general adhesion resisting agent. The high heat resistance and excellent adhesion resistance are achieved by the steps of slicing, mixing, melting co-extrusion, longitudinal drawing, transverse drawing, drawing and trimming, coiling, splitting and forming a finished product. The products prepared by the preparation method disclosed by the invention is environment-friendly and can be directly recycled, so that the pollution to the environment is reduced; and the polyester film can be widely applied to packaging of cakes, seasonings, fast foods and candies and packaging of medical products.

Description

technical field [0001] The invention relates to a three-layer co-extruded biaxially stretched PET film and a preparation method thereof, in particular to an anti-blocking functional polyester film and a preparation method thereof. Background technique [0002] As a new type of industrial material, polyester film continues to expand its application fields. my country's polyester film industry follows the pace of developed countries and combines independent innovation to make full use of the good performance of polyester film materials and the characteristics of meeting environmental protection requirements, vigorously promote and guide consumption, and promote the application of polyester film to a wider range. The market demand is increasing year by year. [0003] Chinese patent application 201019026142.4 discloses an anti-blocking masterbatch for light-diffusing polyester base film and its film preparation method. The film uses the anti-blocking agent masterbatch as an addi...

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Problems solved by technology

[0005] However, the above two methods use ordinary polyester film, and there are few high-value-added and deep-processed products.

On the one hand, this situation has limited the domestic polyester industry to low-level vicious competition, which is not conducive to the development of the entire industry. On the other hand, ordinary polyester films in the international market have gradually shrunk and turned to high value-added , Deep processing product development

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