First, PVC sheet has high toughness and is not easy to burn. When it burns, chlorine will be generated. It will cause some environmental impact. PVC is easy to heat. Sealing machine and high frequency edge sealing can be used. It is the main raw material for producing transparent plastic products. PVC sheet is a widely used and popular materials, PVC film can be divided into two kinds of environmental protection and environmental protection, can be made into transparent, color, anti-static, gold-plated, flocking and other plastic packaging products, the main characteristics of high transparency, good surface gloss, crystal points less, water lines, wide application, small strong impact resistance, and easy molding, products are widely used in toys, food, medicine, electronics, electrical appliances, gifts, cosmetics, stationery and other products packaging.
Two, PS film with low density, poor toughness, easy combustion, combustion will produce styrene gas (a toxic gas), so commonly used to produce all kinds of plastic tray for industrial use. PS sheet is a new environmental protection packaging material developed in recent years. It is widely used in medicine, food, toys and electronics because of its excellent thermal molding performance, good environmental protection and sanitation performance.
Three, PET yingpian toughness, is a new material developed in recent years. Because of its excellent toughness, high strength, high transparency, recyclability and reuse, inflammable combustion and no harmful gas when burning, it belongs to environmental protection material and gradually banned PVC, but the price is high. Suitable for high-grade plastic products, plastic blister in European and American countries generally require the use of PET material, but the heat of high melting point, which brings great difficulties to the high frequency package, in order to solve this problem, people on the surface of PET composite with a layer of PVC film, named PETG, but the price is higher. It is mainly used in electronic, food, toys, color box windows, collar, footwear packaging and so on. The advantages are as follows: 1. has excellent transparency and smoothness, and the display effect is good. 2., the surface decoration performance is excellent, it can be printed without surface treatment, easy to suppress patterns, easy to metallized (vacuum coated metal layer) 3. has good mechanical strength. 4. the barrier performance of oxygen and water vapor is good. 5. chemical resistance is good and can withstand the erosion of a variety of chemicals. 6. non-toxic, reliable health, can be used in the packaging of food, medicine and medical equipment, and Y rays can be used to disinfect the goods they have packed. 7. the adaptability of the environmental protection is good and can be recycled economically and conveniently; when the waste is incineration, it does not produce harmful substances that harm the environment. PET sheet is considered to be an ideal packaging material that meets the requirements of (ROSH) environmental protection.