PET materials were developed in the United States in the early 1970s. Because PET material has the advantages of light weight, high strength, good transparency and gas resistance, non-toxic, tasteless and so on, it has obtained rapid development. Since the 1990s, the production and application of plastic packaging materials have mushroomed, and then with the maturity of touch technology, that is, today's pet protective film silicone glue! Pet protective film application: electronic products, automobiles, buildings, glass surface protective film. There are 5 test methods for silicone glue of pet protective film:
1. Smell: pet silicone protective film and Pu protective film have no smell, acrylic protective film and Pu protective film have smell.
2. Scraping surface: pet silicone protective film and Pu protective film have no trace, acrylic protective film can scrape out powder.
3. Release film test: draw a line on the release film with a water-based pen or a dyne pen. If it is linear, it is a silicone protective film. If it is in the shape of water drop, it is a acrylic protective film or PU protective film. The principle is very simple. In general, silica gel protective film directly uses the original film as the release film, while acrylic protective film and Pu protective film need to be coated with a layer of silicone oil on the release film.
4. Touch release film: the release film of pet silicone protective film will be astringent, and Pu protective film and acrylic protective film will be slippery.
5. Exhaust performance: silica gel has the best exhaust performance, PU glue is slightly worse, and acrylic has very poor exhaust performance.
6. Burning: the glue on the surface of pet protective film is hung up and burned with a fire engine. The gray of silica gel is white, and PU and acrylic will be melted first.
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