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High Performance Thermoplastic Engineering Plastics-UHMWPE

Publisher : Wia   Release time : 4/10/2019 10:41:23 AM

It has been nearly a hundred years since the discovery of plastics. It has been widely used in food packaging, health care, daily life, transportation, entertainment, aerospace, construction, civil engineering, because of its flexible design, light weight, high strength, low price, stable chemical performance, low electrical insulation and many other advantages. Engineering, mechanical engineering and other fields. In plastics, there is a kind of engineering plastics with the best comprehensive properties, such as abrasion resistance, impact resistance, corrosion resistance, self-lubrication and shock absorption. These five properties are the best of the existing plastics. They are called "amazing materials" internationally, which is UHMWPE.

Ultra-high molecular weight (UHMW) is a unique characteristic of this polymer, which has a molecular weight of 3 to 6 million, while HDPE resin has only 300,000 to 500,000. This difference is to ensure that UHMWPE has sufficient strength to achieve wear resistance and impact resistance that other low-grade polymer products are unlikely to possess.

Ultra-high molecular weight polyethylene (UHMWPE) means that it does not melt and flows like a liquid, so the processing method is derived from powder metal technology. Traditional plastic processing technologies, such as injection moulding, blow moulding and thermosetting, can not be applied to UHMWPE. Extrusion moulding is the most common processing technology used in this resin, so the product produced has stronger toughness.

Ultra-high molecular weight polyethylene (UHMWPE) products are mostly supplied in the form of powder and particle. UHMWPE is widely used in various fields due to its various specifications and diversification. It has unique comprehensive performance, including:

1. High impact strength, especially low temperature impact strength, is the highest known plastics at present. The impact strength of UHMWPE is 3 times that of nylon, 2 times that of polycarbonate and 5 times that of ABS. UHMWPE can withstand long-term impact and maintain toughness even at - 196 C. This characteristic is not found in other plastics. UHMWPE itself has good wear resistance and corrosion resistance, so it is complex and bad. In the environment, he became the most ideal material.

2. It has strong wear resistance, and its wear resistance is 5 times that of PTFE and 7 times that of carbon steel.

3. The friction coefficient is small, only 0.07-0.11, and it has good lubricity. When it works in the form of rotation or sliding, even without lubricating oil, it has better lubrication effect than copper with lubricating oil. When it is used as friction parts, no lubricant is needed. It has the advantages of simple maintenance, smooth operation, low noise and little wear and tear. It is a very friction material.

4. It has good non-sticking property and is easy to clean up the surface adhesives.

5. Chemical performance is stable. Except strong oxidizing acid, most of inorganic, organic acid, alkali, salt and organic solvents are not corrosive to UHMWPE in a certain temperature and concentration range (except naphthalene solvent).

6. It has excellent anti-aging property. Under natural light, its aging life is more than 50 years.

7. Completely hygienic and non-toxic, which can be used for contact with food and medicines.

8. Low density and light weight. Ultra-high molecular weight polyethylene (UHMWPE) has a mass of only 0.94 g/cm3 and is easy to handle and install.

Because UHMWPE has many advantages, its application and development are changing with each passing day. A large number of substitutes for copper and other non-ferrous metals, stainless steel, other engineering plastics, rubber, leather materials, used to make various mechanical parts. The main applications are as follows:

1. Construction machinery, agricultural machinery, mining machinery and coal mining machinery;

2. Transportation machinery;

3. Packaging containers and pipes;

4. Paper-making machinery;

5. Textile machinery;

6. Packaging and transportation materials;

7. Chemical machinery;

8. Medical polymer materials;

9. Aviation Military;

10. Sports goods.

Ultra-high molecular weight polyethylene (UHMWPE) is classified into many categories. The main products are pipe material, board material and fibre material, which are widely used in the market. Among them, 9200CG and 9080TG produced by Yanshan Petrochemical Company belong to UHMWPE. They are mainly used for inner casing of pipeline used in mines and sheet materials. Ultra-high molecular weight polyethylene (UHMWPE) is widely used in the market because of its many excellent properties.

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