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PE plastic (polyethylene)
English name: Polyethylene
Specific gravity: 0.94-0.96 g/cubic centimeter molding shrinkage rate: 1.5-3.6% Molding temperature: 140-220℃ Drying conditions: low water absorption, can not be dried before processing.
The physical and chemical properties
1. Corrosion resistance, excellent electrical insulation (especially high frequency insulation), chlorination, irradiation modification, glass fiber reinforcement. 1. Crystallization material, moisture absorption is small, does not need to be fully dry, excellent fluidity, fluidity is sensitive to pressure, molding should be injected with high pressure, uniform material temperature, fast filling speed, full pressure retention. It is not suitable to use a direct gate to prevent uneven contraction and increase internal stress. Pay attention to the gate location to prevent shrinkage and deformation.
The shrinkage range and shrinkage value are large, the direction is obvious, and the deformation is easy to warp. Cooling speed should be slow, mold set cold material hole, and cooling system.
⒊ heating time should not be too long, otherwise it will decompose and burn.
When soft plastic parts have shallow side grooves, they can be forced to release.
5. Melt rupture may occur, and it is not suitable to contact with organic solvents to prevent cracking.
The classification of the PE
(1) LDPE
Low density polyethylene (also known as high pressure polyethylene)
2 LLDPE
Linear low density polyethylene
(3) MDPE
Medium density polyethylene
(4) HDPE
High density polyethylene (also called low pressure polyethylene)
5] UHMWPE
Ultra high molecular weight polyethylene
⑹ Modified polyethylene
Chlorinated polyethylene (CPE), cross-linked polyethylene (PEX)
⑺ ethylene copolymer
Ethylene-propylene copolymer (plastic), EVA, ethylene-butene copolymer, ethylene-other olefin (such as octene POE, cycloolefin) copolymer, ethylene-unsaturated ester copolymer (EAA, EMAA, EEA, EMA, EMMA, EMAH). Polyethylene with a molecular weight of 3 million to 6 million is called ultra-high molecular weight polyethylene (UHMWPE). Ultra-high molecular weight polyethylene is so strong that it can be used to make body armor.
Processing and application
It can be processed by blow molding, extrusion, injection molding and other methods, and is widely used in the manufacture of films, hollow products, fibers and daily sundries. In the actual production, in order to improve the stability of polyethylene to ultraviolet light and oxidation, and improve the processing and use performance, a small amount of plastic additives should be added. Commonly used UV absorbers are o-hydroxydiphenyl ketone or its alkoxy derivatives, etc. Carbon black is an excellent UV shielding agent. In addition, antioxidants, lubricants, colorants, etc. are added to expand the application scope of polyethylene.
Guangzhou Yayan Plastic Products Co., LTD. Spot supply: PEEK board/rod, PPS board/rod, PVDF board/rod, PTFE board/rod, PSU board/rod, PEI board/rod, PI board/rod, PAI board/rod, PPO board / bar, PBT board/bar, CPVC board/bar, UPE board/bar, PETP board/bar, PC board/bar, POM board/bar, ABS board/bar, PMMA board/bar, PP board/bar, PE board / bar, imported PU board/bar, German PES board/bar, domestic PVC board/bar, Swiss engineering PBI board/bar, German PA nylon series board/bar/piece, MC nylon series board. Insulation materials: Taiwan red, black electric board, cold stamping board, phenolic laminated cloth bar board, heat insulation board, epoxy glass fiber bar board, epoxy board (FR-4) asbestos board, etc. Anti-static products: anti-static POM board/bar, anti-static organic board, anti-static PC board. Anti static PVC board/bar, anti static nylon board/bar synthetic SLATE and so on.
Welcome to call and visit to negotiate!
For more information, call 020-36228290
Mobile phone: 180 2748 2446
QQ: 1006680516
Contact person: Miss Huang
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