Double sides anti-fog and double sides films PET plastic sheets for face shield protecting you from

Specification of Double sides anti-fog and double sides films PET plastic sheets for face shield protecting you from Corona Virus 

Polyethylene terephthalate is the most important type of thermoplastic polyester. The English name is Polyethylene terephthalate, abbreviated as PET or PEIT (hereinafter referred to as PET), commonly known as polyester resin. The molar molecular weight of the repeating unit is 192g/mol. It is a condensation polymer of terephthalic acid and ethylene glycol. Together with PBT, it is collectively referred to as thermoplastic polyester, or saturated polyester. In 1946, the United Kingdom issued the first patent for preparing PET. In 1949, the British ICI formula completed the pilot test. However, after the United States DuPont purchased the patent, the production facility was established in 1953, the first in the world to realize industrialized production. In the early days, almost all PET was used for synthetic fibers (commonly known as polyester in our country, really good). Since the 1980s, PET has made breakthroughs in the development of engineering plastics. Nucleating agents and crystallization accelerators have been developed one after another. PET and PBT together as thermoplastic polyesters have become one of the five major engineering plastics.
PET is divided into fiber-grade polyester chips and non-fiber-grade polyester chips. ① Fiber-grade polyester is used to make polyester staple fiber and polyester filament, and is the raw material for polyester fiber enterprises to process fibers and related products. Polyester is the most productive variety in chemical fiber. ②Non-fiber grade polyester is also used in bottles, films, etc., which are widely used in the packaging industry, electronic appliances, medical and health, construction, automotive and other fields. Among them, packaging is the largest non-fiber application market for polyester, and it is also the most growing PET market. Fast field.
Advantages of PET as a packaging material:
1. It has good mechanical properties, impact strength is 3 to 5 times that of other films, and good folding resistance.
2. Resistance to oil, fat, dilute acid, dilute alkali, and most solvents.
3. With excellent resistance to high and low temperatures, it can be used for a long time within the temperature range of 120°C, and can withstand high temperatures of 150°C and low temperatures of -70°C in short-term use, and has little effect on its mechanical properties at high and low temperatures.
4. The gas and water vapor permeability is low, and it has excellent gas, water, oil and odor resistance.
5. High transparency, can block ultraviolet rays, and good gloss.
6. Non-toxic, tasteless, good hygiene and safety, and can be directly used for food packaging.

Polyterephthalate plastics mainly include polyethylene terephthalate (PET) and polybutylene terephthalate (PBT).
　　PET has a highly symmetrical molecular structure and a certain crystal orientation ability, so it has high film-forming properties and properties. PET has good optical properties and weather resistance, and amorphous PET has good optical transparency. In addition, PET has excellent wear resistance, friction, dimensional stability and electrical insulation. PET bottles have high strength, good transparency, non-toxic, anti-permeation, light weight, high production efficiency, etc., so they are widely used. The molecular chain structure of PBT and PET is similar, and most of the properties are the same, except that the main molecular chain has changed from two methylene groups to four, so the molecules are more flexible and processing performance is better.
The main uses of polyterephthalic acid plastics are:
Film and sheet materials: all kinds of food, medicine, non-toxic and sterile packaging materials; high-end packaging materials for textiles, precision instruments, electrical components; audio tapes, video tapes, movie films, computer floppy disks, metal coatings and photosensitive films, etc. Substrate; electrical insulation materials, capacitor films, flexible printed circuit boards and membrane switches and other electronic and mechanical fields.
　　 Packaging bottle application: Its application has been developed from the initial carbonated beverage to beer bottles, edible oil bottles, condiment bottles, medicine bottles, cosmetic bottles, etc.
　　Electronics: manufacturing connectors, coil bobbins, integrated circuit shells, capacitor shells, transformer shells, TV accessories, tuners, switches, timer shells, automatic fuses, motor brackets, relays, etc.
Auto parts: such as switchboard covers, ignition coils, various valves, exhaust parts, distributor covers, measuring instrument covers, small motor covers, etc., and PET’s excellent paintability, surface gloss and rigidity can also be used to manufacture automobiles Exterior parts.
　　Mechanical equipment: manufacture gears, cams, pump housings, pulleys, motor frames and watch parts, and can also be used as microwave oven bakeware, various ceilings, outdoor billboards and models, etc.