Development and application of PET functional film-technical knowledge
The development and application of PET functional film source: protective film factory direct sales Release time: 2019-10-11 Hits: 1078 With the progress of petrochemical technology, China has developed rapidly in the polyester industry, and has now become the world's largest The production base of polyester products. Among them, polyethylene terephthalate (PET) is widely used in the production of bottles, fibers, and films due to its excellent rigidity, heat resistance, electrical insulation and chemical resistance. PET film has a wide range of uses in electronics, food packaging, and photosensitive materials. Commonly used synthetic methods of PET include the direct esterification method of terephthalic acid (PTA) and ethylene glycol (EG) (PTA method) and the transesterification method of dimethyl terephthalate (DMT) and ethylene glycol (DMT). Law). In the process of polycondensation, PET needs to add catalysts (such as antimony trioxide), stabilizers and other additives or assistants. At the same time, there are by-products (such as diethylene glycol, acetaldehyde and some oligomers) during the esterification reaction. ), and some of these substances are toxic, and will migrate to the contents through packaging materials during contact with food, which will lead to contamination of the contents and further affect the health of consumers. The special migration of monomers and oligomers in PET is studied and analyzed. Countries in the world have formulated corresponding laws and regulations for the hygiene and safety requirements of PET used for food packaging materials, and stipulated maximum migration limits and restrictions on use requirements for substances with migration risks. Foshan Bowei Environmental Protection Material Co., Ltd. is an electronic material supplier with 20 years of experience. It can produce PET film with multiple functions, such as: sub-(matte) PET film, flame-retardant (fire-resistant) PET film, inkjet printing Film, anti-static PET film, anti-fog PET film, anti-UV PET film, non-shrinking PET film, PET release film, optical PET film, etc. Interested parties welcome to inquire!