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Polyethylene Terephthalate(PET) is the most common thermoplastic polymer resin of the Polyester family,it is used in fibers for clothing, containers for liquid and food, thermoforming for manufacturing and in combination with glass fiber for engineering resins. The majority of the world's PET production is for synthetic fibers, followed by bottle product.In the context of textile applications, PET is referred as POLYSTER. Whereas PET is generally used in relation to packaging,PET is also used for making PET Films.
PP (Polypropylene) granules is a nontoxic, odorless, tasteless, creamy, high crystalline polymer with a density of only 0.90 -- 0.91g/cm3, one of the lightest plastics available. It is particularly stable with water, with a water absorption rate of 0.01%. PP has the advantages of excellent comprehensive properties, good chemical stability, good shape processing performance and relatively low cost.It can adapt to a wider range of application requirements through modifying, copolymerization,grafting,blending, reinforced filling, transparency filling.
Polyvinyl chloride(PVC) is the third-most widely manufactured and used plastic raw material, it comes in two basic forms: rigid and flexible. The rigid type PVC is used in making of pipes and profiles applications such as doors and windows. PVC is used in construction because it is more economic than traditional metal materials in pipe and profile applications. It can be made softer and more flexible by the addition of plasticizers, the most widely used being phthalates. In this form, it is also used in clothing and upholstery, electrical cable insulation, plumbing, floooring, wall covering, artificial leather, signage, phonograph records, inflatable products and many applications where ruubber is used.
High density polyethylene (HDPE) is non-toxic, tasteless, no smell white particles, it is mainly a linear molecular structure and has little branching. It has a high degree of crystallization and high density,melting point is about 130°C, relative density of 0.941 - 0.960. It has good heat resistance and cold resistance, chemical stability, but also has high rigidity and toughness, good mechanical strength. Dielectric properties, environmental stress cracking resistance are also good.
Linear Low Density Polyethylene (LLDPE) is a copolymer of ethylene and a small amount of advanced olefin in the presence of catalyst.LLDPE is similar to LDPE in appearance, with poor transparenccy and good surface gloss. LLDPE has the advantages of low temperature toughness, high modulus, bending resistance and stress cracking resistance, and good impact strength at low temperature. LLDPE is mainly used for making film, pipes, injection molding products, blow molding containers, rotation alloy molding products and wire & cable covering material.
Low Density Polyethylene (LDPE), commonly known as high-pressure Polyethylene,it has strong tensile and impact strength and excellent properties to resist puncture and impact at low temperatures,it is mainly used in plastic bags and agricultural film due to its low density and softness.LDPE has high fluidity and good prodess stability. It is suitable for being used in all types of thermoplastic processing processes, such as injection molding, extrusion molding, blow molding, rotomolding, coating, foaming, thermoforming, hot-jet welding and thermal welding.
