Brief introduction of HDPE material

Tongxiang produce various high quality belt conveyor idler rollers,include HDPE roller.There have brief introduction of hdpe material.
HDPE is the abbreviation of high density polyethylene, which is a thermoplastic polyolefin formed by copolymerization of ethylene.HDPE is an opaque white waxy material. Its specific gravity is lighter than water, soft and tough, but it is slightly harder than LDPE. 
It is also slightly elastic, non-toxic and tasteless. It is a product of polymerization under low pressure conditions catalyzed by Ziegler catalyst, so high density polyethylene is also called low pressure polyethylene.The unique characteristics of various grades of HDPE are the appropriate combination of four basic variables: density, molecular weight, molecular weight distribution, and additives. Different catalysts are used to produce custom specialty polymer. These variables combine to produce HDPE grades for different uses;
Advantages of HDPE:
1. HDPE has excellent resistance to most domestic and industrial chemicals. It is resistant to corrosion and dissolution by strong oxidants, acid-base salts and organic solvents.
2. HDPE is non-hygroscopic and has good waterproof and steaming properties. It can be used for moisture proof, anti-seepage or packaging.

3. HDPE has good electrical properties, especially high dielectric strength, making it suitable for wire and cable. Medium to high molecular weight grades have excellent impact resistance, both at ambient temperatures and even at low temperatures of -40F.
4. HDPE has good processability and heat sealability.
5. HDPE has a high degree of paperiness, stiffness and opening, hardness is 4 to 5 times that of LDPE film. Its surface hardness, tensile strength, rigidity and other mechanical strengths are close to PP, which is tougher than PP.
6. HDPE is non-toxic and odorless, can also be used for food, clothing, knitwear and other packaging materials, economical.
The disadvantages of HDPE:
1. Its aging resistance and environmental stress cracking are not as good as LDPE, especially thermal oxidation will reduce its performance. Therefore, high-density polyethylene is added with anti-oxidant and UV absorber to make it insufficient when it is made into plastic coil. Where.
2. HDPE has low transparency and poor barrier to oxygen and other gases.
3. difficult to print, when printing, surface discharge treatment is required, can not be electroplated, the surface is dull.
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