Polypropylene extinction film and preparation method thereof

Abstract

The invention discloses a polypropylene extinction film and a preparation method thereof. The polypropylene extinction film comprises a heat sealing layer, a supporting layer, an extinction layer anda temperature-resistant extinction layer; the polypropylene extinction film is characterized in that the mass ratio of the heat sealing layer to the supporting layer to the extinction layer to the temperature-resistant extinction layer is (0.10-0.20):0.6:0.15:0.1. According to the prepared polypropylene extinction film, the temperature-resistant extinction layer is added, and a traditional three-layer structure is changed into a four-layer structure; the extinction effect of the polypropylene extinction film is improved; the heat resistance and stability are enhanced, the problem that a polypropylene extinction film is prone to being bonded with a high-temperature cutter during hot cutting bag making is solved, the time interval of shutdown cleaning of the high-temperature cutter is increased from 4 hours to 12 hours, the time is greatly saved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of plastic films, in particular to a polypropylene matting film and a preparation method thereof. Background technique [0002] In the field of handbag bags, polypropylene matting film is usually used. The main reason is that the polypropylene matting film has excellent mechanical properties, and at the same time can effectively reduce the external light and reduce the evaporation of the external light on the content of the bread, thereby improving the taste of the bread and keeping the bread delicious. [0003] At present, the preparation of polypropylene cast film is generally a three-layer structure. The matting raw material used in the matting layer is matting masterbatch, and the composition of matting masterbatch is generally a blend of binary copolymerized polypropylene and high-density polyethylene. However, due to low In the presence of high-density polypropylene with a melting point, the product i...

AI Technical Summary

Problems solved by technology

The biaxially stretched polypropylene matting film described above can improve the matting effect of the film by roughening the body of the matting bottom layer by setting a matting bottom layer with a thickness of 0.8-1.5 μm, but the biaxially stretched polypropylene matting film prepared by this utility model The heat resistance of the film is poor, and the performanc