The classification of plastics
Plastic product classification of plastic raw material ABS, AAS, ACS, ASA, BMC, PA66, PP, EVA, LDPE, LLDPE, other plastics thin film, pipe, plate, container, woven bag, plastic barrels, plastic packaging, plastic weaving, plastic parts, electronic equipment, electrical equipment, bakelite, foam, leather, synthetic leather, artificial leather, ribbon, plastic toys, plastic stationery, different pipe and other plastic machinery molding machine, crushing equipment, building materials machinery, drying equipment, welding machine, auxiliary machine and accessories, injection molding machine, extruder, different pipe machine, pipe machine,Sheet machine, plate machine, film machine, granulating machine, blow molding machine, plastic machinery, packaging equipment, printing equipment, machines, machine parts, press and other engineering plastics polycarbonate (PC) and ABS alloy, thermoplastic elastomer, polycarbonate copolymers, poly (ether imide, polyphenylene oxide (PPO), polyformaldehyde (POM), and other plastic additives pigments, masterbatch, whitening agent, flame retardant, lubricant, filler and stabilizer, antioxidant, plasticizer, toughening agent, nucleating agent, foaming agent, dispersing agent, bright agent, light stabilizer, antistatic agent, heat stabilizer, smooth agent, titanium dioxide,Plastic filling agent, filling agent, colorant, release agent, strengthening agent, antibacterial agent, coupling agent, modifier, and other plastic mould home appliance mould, electronic mold, mold, packing aviation mold, mechanical and electrical mould, building materials moulds, tools mould, mould technology, medical mould, commodity mould, automobile and motorcycle moulds, and other chemical raw materials acrylonitrile, PTA, pet, caprolactam, nylon yarn, acrylic, polyester chip plastic classification structure and composition of
(1) made of plastic Plastic is made from natural materials into basic atoms and molecules.The plastic molecules are then formed by pressure and chemical action.These natural materials, such as wood, oil, coal and air, are synthesized to produce high molecular organic compounds.
(2) classification of thermoplastic plasticity - softening when heated and solidifying when cooled - softening when reheated - is initially softened when heated.Into mold inner heating, plastic molecules can combine and hardening, when hardening after forming, if add cooked again, also won't soften,
(3) the plastic manufacturing (1) crystalline plastics - PE. PP. Nylon, PBT, POM, PPS, LCP, sPS. PET. TPx features such as: (A) have obvious melting point.(B) when the solid is in regular arrangement, the molecules are strong and the tension is strong.(C) melting is bigger than volume change, when inflation by about 30%, (hood: cm3 / g) (D) lower density value after melting, so easily contraction after curing, (E) the molecular chain arrangement is very tight, so the internal stress is not easy to release.(F) the mixing degree of cooling forming is increased, so the finished product is opaque.(H) during the production of cold mold, the shrinkage rate was small at that time, but it was due to the low crystallinity, resulting in greater shrinkage in the future.(I) at the time of thermal mold production, the shrinkage rate was relatively high, because the crystallization degree was high and the later shrinkage was small.(J) the slower the cooling of thermal mold production is, the higher the degree of crystallization is, the better the physical state is, and the more opaque (K) is, with the characteristics of heat resistance and drug resistance.(L) than volume: PE 1.03 cm3 / g in 20 ℃, at 200 ℃ for 1.33 cm3 / g, increase the rate of 29% (2) an amorphous plastic: PS, AS, ABS, PMMA (acrylic), PC, NORYL, PVC, PES (poly) rewelding, CA.Properties :(A) when there is no obvious melting point (B) solid, the molecules are irregular, weak in strength and tension.(c) melting than the volume is not large, inflation 8%, (unit: cm3 / g) (d) after the melt density values change smaller, less contraction after curing transparency (E) is due to the low degree of crystallization (F) in forming heat faster, so less hot after finished product from the mold.(G), the material temperature is higher, the color is more yellow than volume (H) : PS at 20 ℃ to 0.97 cm3 / G at 200 ℃ for 1.04 cm3 / G increase at a rate of 8.3%