Classification of plastic products

Plastic raw materials

ABS, AAS, ACS, ASA, BMC, PA66, PP, EVA, LDPE, LLDPE, and other

Plastic products

Film, pipe, plate, container bags, plastic barrels, plastic packaging, plastic weaving, plastic parts, electronic equipment, electrical equipment, bakelite, foam, leather goods, synthetic leather, artificial leather, ribbon, plastic toys, plastic stationery, shaped pipe and other

Plastic machinery

Molding machine, grinding equipment, building materials machinery, drying equipment, welding machine, auxiliary equipment and accessories, injection molding machine, extruding machine, shaped pipe machine, tube machine, sheet machine, sheet metal machine, film machine, granulating machine, blow molding machine, plastic machine, packaging equipment, printing equipment, instrument, machinery parts, pressure presses and other

Engineering plastics

Polycarbonate (PC), ABS alloy, thermoplastic elastomer, polycarbonate copolymer, polyetherimide, polyphenylene oxide (PPO), poly (POM) and other

Plastic additives

Pigments, masterbatch, whitening agent, flame retardant, lubricants, bulking agent, stabilizer, antioxidant, increase plasticizer, toughening agent, nucleation agent, foaming agent, dispersant, brightening agent, light stabilizer, antistatic agent, heat stabilizer, smooth agent, titanium dioxide, plastic filler, filler materials, colorants, release agent, strengthening agent, antibacterial agent, coupling agent, modifier, other.

Plastic mould

Home appliance mould, electronic mold, mold package, aviation mold, electromechanical mould, building material mould, tools mold, mold, medical mould, commodity mould, auto mould, other

Chemical fiber raw material

PTA, acrylonitrile, caprolactam, nylon, polyester, acrylic, polyester chips

Classification structure and composition of plastics

(a) plastic

Plastic is a natural material to break down into basic atoms and molecules. And then, with the pressure and the chemical action of the mature, the plastic molecules. These natural materials, such as wood, petroleum, coal, air, etc., are made of high molecular organic compounds.

(two) the classification of plastics

Thermal plasticity - when heated, it will soften, and it can be softened when it is cooled and heated.

Thermosetting - when heated, it is also the first to soften. Injection mold internal heating and plastic molecules will combined hardening, when after the forming of the hardening, if again add cooked, does not soften,

(three) plastic manufacturing

(1) Nylon, PE, PP, PBT, POM,, PPS, LCP,,,,,, sPS,, PET, TPx:

(A) there is a distinct melting point.

(B) when the solid is a regular arrangement of molecules, the intensity is strong, the tension is strong.

(C) the melting ratio of volume change, expansion of about 30% - (cover: cm3 / g)

(D) after melting density is low, so after curing is easy to shrink.

(E) molecular chains are closely arranged, so the internal stress is not easily released.

(F) in the form of a mixed degree of cooling forming, the finished product is opaque.

(G) forming heat slowly, so the finished die after particularly hot.

(H) when the cold mold production, the shrinkage rate is small, but the crystallization degree is low, resulting in a larger contraction in future.

(I) when the thermal mode is produced, the shrinkage rate is larger, but the crystallization degree is high, and the shrinkage is smaller.

(J) the cooling of the hot mold production is slower, the higher the degree of crystallization of the physical condition is also good, the more opaque

(K) have the characteristics of heat resistance, drug resistance and so on.

(L) specific volume: PE at 20 for 1.03 cm3/g, at 200 for 1.33cm3/g, an increase of 29%

(2) amorphous plastic: PS, AS, ABS, PMMA, PC (acrylic), NORYL, PVC, PES, CA (poly Su).

Characteristic

(A) no obvious melting point

(B) the molecules in the solid are irregular, and the strength and the tension force are weak.

(c) the melting ratio of volume is small, the expansion of around 8%, (unit: cm3/g)

(d) the smaller density changes after melting, solidification shrinkage is not easy

(E) the degree of crystallinity is low

(F) forming heat faster, so the finished die after is not hot.

(G) the higher the temperature of the material, the more the color is yellow.

(H) specific volume: PS at 20 for 0.97cm3/g at 200 cm3/g 1.04 8.3%