A kind of grinding fog type easy heat sealable PP film and preparation method thereof

Abstract

The invention belongs to the technical field of packaging materials and discloses a grinding fog type PP film which has easiness in heat seal and can be internally printed and a preparation method. The PP film is composed of a corona layer, a core layer and a heat seal layer, wherein the corona layer is prepared from ingredients in mass fraction: 0 to 85 parts of bimodal PE, 15 to 100 parts of binary co-polypropylene, 0 to 1.5 parts of slip agent, 0 to 1.5 parts of opening agent and 0 to 1.5 parts of antistatic agent; the core layer is prepared from ingredients in mass fraction: 85 to 100 parts of homo-polypropylene and 0 to 15 parts of POE; the heat seal layer is prepared from ingredients in mass fraction: 100 parts of bimodal PE, 0 to 1.5 parts of slip agent, 0 to 1.5 parts of opening agent and 0 to 1.5 parts of antistatic agent. The preparation method comprises the steps: utilizing a three-layer co-extrusion extruding machine to plastify all layers of formula mixtures; casting, cooling and forming, wherein a cooling temperature is 26 to 30 DEG C; drawing, performing corona treatment, cutting edges, rolling and forming films. The grinding fog type PP film disclosed by the invention has the advantages of very good grinding fog effect, good heat seal performance and application to high-speed package.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a fog-milling type easy-to-heat-seal and inner-printable PP film and a preparation method thereof. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: Plastic printing and packaging film is transparent and glossy, and the product is bright and bright, so it can replace paper packaging, but it has a glass frosting effect, and the "fog" packaging form arouses people's new aesthetic taste, so the development of the matte type The packaging film looks like frosted glass and paper packaging, and will not reflect light. The existing technology of making fog-milled packaging film generally uses the method of adding masterbatch, but the following new problems are caused after adding: 1. The composition of the masterbatch is CaCO2 with different particle sizes 3 , talcum powder, etc., the processing fl...

AI Technical Summary

Problems solved by technology

The existing technology of making fog-milled packaging film generally uses the method of adding masterbatch, but the following new problems are caused after adding: 1. The composition of the masterbatch is CaCO2 with different particle sizes 3 , talcum powder, etc., the processing fluidity becomes worse; 2. The film heat sealability becomes worse; 3. The mechanical properties of the film material will decrease

[0004] (1) The existing grinding fog packaging film has poor processing fluidity;

[0005] (2) The heat sealability of the film is poor;

[0006] (3) The mechanical properties of film materials decrease

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