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The difference between PET and PETG (two)-film supplier

by:POLYVA     2021-12-09
Special grade stretch blow molding grade PET can provide pure color, green and light yellow PET. The colored polymer in the reactor does not need to be recombined to adversely affect the physical properties, and the color uniformity is improved. A variety of pure resins with different inherent viscosities are available. PET copolymers have a slower crystallization rate, which allows the production of high-quality soda beverage bottles under a wide range of processing conditions. An extrudable blow-moldable polymer can also be provided. This material has the advantages of excellent melt strength and slow crystallization speed, and can be simply processed on applicable extrusion blow molding equipment. Various reinforced, flame-retardant and other specialty polymers are constantly being introduced or improved to meet new applications. PETG copolyester is another example among many copolyesters. Unlike PCTA modified with acid, PETG is a diol-modified polymer compounded by CHDM diol, TPA (terephthalic acid) and ethylene glycol. PETG copolymers can be molded or extruded, and generally retain amorphousness, transparency, and virtually colorlessness, even in large cross-sections. It has high rigidity, hardness and good toughness, and it maintains its due toughness even at low temperatures. The combination of transparency, toughness and melt strength make it suitable for injection molding, blow molding and extrusion of profiles, pipes, films and plates. PETG is available in unmodified type or with various additives, including release agent, masterbatch and impact modifier for injection molding. PETG should be dried at 120-160F for about 4-6 hours before molding or extruding. The melt temperature range in both processes is from 420F to 510F. The holding time of processing equipment at higher temperatures should be as short as possible to prevent excessive degradation. Injection molding should be carried out on an injection machine, and each injection volume is required to be 50% to 80% of its capacity. PETG can be squeezed and blow molded at a melt temperature between 400-450F to make transparent bottles for shampoo, liquid detergent, sanitary products, mineral oil and food packaging. This material complies with FDA standards and can be in contact with food. Extrusion can produce a wide range of profiles, as well as packaging tubes, films and sheets, including packaging for medical equipment. PETG and PCTA can be sterilized with ethylene oxide and gamma rays. When used for injection molding, PETG is usually processed at a melting temperature range of 450-510F, and the mold temperature is about 70-130F. Current applications include instrument covers, machine guards, cosmetic containers, lever device pointers, display components, and toys. PET is mainly used in soda soft drink packaging. PET has occupied nearly 100% of the 2 liter non-recyclable container market, and 1.5 liter, 1 liter, 0.5 liter and even the smallest PET bottles have also been widely recognized. PET is used in food, wine, and detergent. The demand for PET for uncarbonated beverages and industrial product packaging is expected to continue to grow. Packaged foods include mustard, gum products, peanut butter, condiments, edible oil, cocktails and concentrated juices. New colors, especially Weber color PET in medicine. The packaging of vitamins and detergents is very popular. One of the latest and fastest growing applications of PET containers is food or beverage packaging, which requires filling at high temperatures. Many foods, especially fruits or foods or beverages with high fruit content, must be packaged at 180F or higher. This provides pasteurization (sterilization) for products and containers during filling. Ordinary oriented containers, such as soda soft drink packaging bags, tend to shrink and deform when subjected to high temperatures above 160T. This is due to a certain amount of stress relaxation. Stress concentration occurs during stretch-blow molding of the container. The technology for improving heat resistance during processing has been developed, which is usually referred to as 'heat setting' technology. According to the specific processing technology, there are several kinds of processing technology details, which have high patent rights. According to this, a container suitable for filling at 190-195F can be produced. Products that require the packaging to have this characteristic include pure juice. High juice content beverages, teas, certain isotonic and sports drinks, condiments, concentrated fruit juices and certain mineral waters. Other end uses of PET are widely used in extrusion coatings and extruded films and sheets. PET is used as an extrusion coating material for bakeable cardboard packaging. In addition, crystalline PET (CPET) can also be used as the basic material to make plates in the oven. PET film is usually biaxially oriented and used for X-ray and other photographic films, meat and cheese packaging, magnetic tape, electrical insulation, printing plates and partial bottle packaging. PET is also used as an industrial tape material. Amorphous, non-oriented PET films and sheets have begun to expand to be used in molded containers, trays, foamed products and beverage cups. It 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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