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Advantages of biaxially oriented PET film technology-film supplier

by:POLYVA     2021-11-03
There are many molding methods for plastic films, such as calendering, casting, blow molding, and stretching. Among them, biaxial stretching has become one of the most concerned methods in recent years. The common characteristics of biaxially stretched films are high tensile strength, good stiffness, high transparency, high and low temperature resistance, good insulation performance, high barrier properties, non-toxic and tasteless. It is very suitable for the packaging of food and high-end commodities, and it is also widely used in electronic industry products. Sensitive film, tape substrate, especially optical film is a kind of material with excellent performance. After the film is biaxially stretched> online anti-static coating, in addition to molecular orientation, its microstructure has also changed significantly, which makes its performance and non-stretched film have obvious differences: (1) Mechanical properties. After biaxially stretched film, its tensile strength and elastic modulus can be increased several times, and its impact strength, for PP, PVC, PET stretched film, it has obvious difference from unstretched film, especially in At low temperatures, its impact strength does not decrease, that is, its cold resistance performance is excellent, but at high temperatures, its performance does not deteriorate, which makes the biaxially stretched film have a wide operating temperature range. (2) Thermal performance. Thermal shrinkage is a characteristic of biaxially stretched film, and these two points are used to make the film suitable for shrink packaging. In order to make the film have low-temperature shrinkage, it is particularly advantageous to use the tube film method of simultaneous biaxial stretching. This is because the microstructure can be increased under biaxial stretching, and the bubble is directly cooled and in a stretched state. (3) Optical performance. After the film is biaxially stretched, its transparency and gloss are improved, especially because it does not form a spherulite structure, which increases the refractive index of the film, so it has the characteristics of not reducing gloss and transparency due to abrasion. (4) Electrical performance. Electrical properties such as breakdown voltage and volume resistivity are improved to varying degrees in biaxially oriented films. Sometimes, static electricity problems accompany. (5) Air tightness. The film produced by crystalline polymer is biaxially stretched, and its water vapor, oxygen or other gas transmission rate is reduced by 1/3 to 1/2, which is particularly important in the food packaging industry. (6) Antistatic property After online coating treatment with long-lasting long-lasting polymer transparent conductive liquid, the surface of the product is evenly coated with a permanent antistatic coating, which directly acts on the surface without affecting the transparency and has a better antistatic effect! Is a company specializing in the production of PET film with multiple functions, such as: transparent PET film, milky white PET film, release PET film, supply of PET motor film, etc. With a wide variety of products, affordable prices, and environmental protection, we provide customers with excellent quality and service based on the service tenet of excellence in production, honesty and trustworthiness in distribution, and warm and thoughtful service. Interested parties welcome to inquire! Contact: Wen Feng 13728425799
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