Application advantages and quality appraisal of PET protective film

In the 1990s, the production and application of plastic packaging materials developed rapidly. With the maturity of touch technology, PET protective film materials and silicone glue have also been used on various liquid crystal displays, forming today's PET protective film. With the development of smart phones. PET protective film is widely favored by the market and consumers, and is widely used in mobile phone protective film, surface protection of various electrical appliances, and film cutting protection of electronic products.

The advantages of PET protective film: PET material has the advantages of light weight, high strength, good transparency and gas barrier, non-toxic, tasteless, etc., so it is developing rapidly.

Introduction to the number of layers of PET protective film: There are many kinds of PET protective film, the most common is the three-layer transparent PET film, which is mainly used as a protective film on the surface of mobile phone screens, tablet computer screens, and monitor screens. The silicone PET protective film has stable performance, no rainbow pattern, convenient die-cutting processing, good application performance, and is widely welcomed by the market. In addition, there are double-layer PET protective film, four-layer PET film is mainly used for machine hand sticking screen protective film, PET protective film is divided into glue series: silicone PET protective film, acrylic plastic PET protective film, PU plastic PET protective film.

The main factors affecting the quality of pet protective film are:

1 Substrate: PET release film is to apply silicone release agent on the surface of the PET film. The quality of the substrate directly affects its performance. Domestic polyester film substrates lag behind foreign countries in terms of thickness control and heat shrinkage.

2 Residual sticking rate: Residual sticking rate refers to the force of the release paper after the first peeling and the second peeling. The calculated data mainly reflects the curing effect of silicone oil.

3 Peeling force: The size of the peeling force directly affects the performance of the PET release film. The general industry standard peel force tolerance range is ±15%.

4 Processing environment: With the continuous progress of various products and the improvement of quality technology, the cleanliness requirements of pet protective films are becoming more and more stringent, especially in the electronic film cutting industry.