Grinding fog type PP film which has easiness in heat seal and can be internally printed and preparation method

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 particularly relates to a mist-type easy-to-heat-seal crepe PP film and a preparation method. Background technique [0002] Currently, the existing technology commonly used in the industry is as follows: Plastic printing packaging film has the characteristics of transparency, good gloss, bright, bright and other characteristics, which replaces paper packaging, but it has a glass frosted effect, showing a "fog"-like packaging form that causes people to new aesthetic appeals, so the frosted type is developed The packaging film looks like frosted glass and paper packaging without reflecting light. The existing technology for making fogging-type packaging film generally uses the method of adding a masterbatch, but the addition causes the following new problems: 1. The composition of the masterbatch is CaCO with different particle sizes 3 , Talcum powder, etc., the processing fluidity will ...

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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