Protective film is more and more widely used, of which PE Protective film is currently one of the most popular protective film on the market, mainly widely used in plastic packaging, transparent glass products, liquid crystal display and so on, these applications on the protection film transparency requirements are relatively high, the following Xin Zhongsheng to teach you how to improve the transparency of PE protective film methods.

First, PE Protective film is a typical crystalline polymer body, there are mainly the following five methods to improve transparency.

1. Add nucleating Agent to PE protective film particles.

(1), nucleating agent in crystalline polymersDie-cutting processing plantDuring the molding process, it can replace the nuclei, so that the polymer molecules grow into crystals on the nucleating agent, because of the addition of nucleating agent, PE Protective film, PP protective film melt in the melting point of the crystalline nuclei can be significantly increased, crystallization speed is accelerated, and crystalline particles are slightly refined, so that the crystal does not affect the transparency of the film, so PP film crystallinity, improve the strength of the film at the same time, improve the transparency.

(1), nucleating Agent divided into organic nucleating agent and inorganic nucleating agent two categories. Organic nucleating agent has benzoic acid, sodium benzoate and so on, inorganic nucleating agent has talc powder, sodium carbonate and so on. Added amount of sodium benzoate 0.25PHR, benzoic acid 0.4Phr,na2co30.2phr, talc 0.05PHR. For example, adding 0.3-0.7% calcium stearate nucleating agent to HDPE can increase the transparency of HDPE film from 67% to 73.5%.

2, in PE protective film particles to add 0.5-1% of the homogeneous oil.

This homogeneous oil can be with PVC, PE, PP, PU, PC, PS, HIPS, ABS, AAS, PMMA, PET, PBT and so on have good compatibility, can use direct pigment powder dyeing into uniform transparent good colored plastic, and homogeneous oil non-toxic, It can be used for molding machining with a high speed stirring at 50-70 ℃.

3, can be in the PE protective film to add polyolefin transparent additive DBS.

It is based on Sls sugar alcohol and benzaldehyde as raw materials synthesis of two benzyl Sls sugar alcohol, is dedicated to Polyolefin nucleating agent, it can make PP reduce fog 60%,LLDPE reduce fog 61%, and can improve the rigidity of 8-10%, but also improve heat resistance 9-10 ℃, improve the crystallization speed of PO more than 1 time times, It also improves the gloss and whiteness of the film.

4, in PEProtective film Die-cuttingIn the process of film film production, the machining temperature of the cylinder is appropriately improved and the method of cooling is adopted.

The transparency of the film can be improved. In fact, to produce transparent PP film, it is necessary to use water sudden cooling method, such as the use of air cooled, because the cooling effect is not good, the production of PP blowing film is fuzzy, translucent shape. Therefore, the proper improvement of processing temperature and the use of high efficiency cooling means in production is an effective way to improve transparency.

5, in the PE protective film, PP Protective film to add a small amount of good compatibility with the high transparency of polyacrylate resin.

Understanding the method of improving the transparency of the protective film, we should also pay attention to: if the PE protective film crystallization does not cool quickly, otherwise it will lead toProtective film Die-cuttingThe original transparency was significantly reduced.