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Ultra-high molecular weight polyethylene
by：CSSSLD
2021-02-03
Special engineering plastics and general engineering plastics blending alloy high-performance injection molding processing, is a hot topic of research and development in recent years, the purpose is to speed up the pace of the application of high-performance materials.
Polyphenylene sulfide is a kind of sulfur-containing aromatic compounds, referred to as 'PPS, is one of the fastest growing engineering plastics in recent years, production after the five common engineering plastics.
PPS with low molecular weight and high molecular weight, low molecular weight PPS brittleness is bigger, subject to a certain degree of crosslinking, and the mixing glass fiber, carbon fiber or inorganic packing can be made into finished products.
the molecular structure of the ultra-high molecular weight polyethylene with ordinary polyethylene are exactly the same, is particularly high molecular weight. At more than 1. 5 million relative molecular mass of UHMWPE, and relative molecular mass 2 million, 3 million, even as high as more than 5 million grade. Ultra-high molecular weight polyethylene performance is very good, especially to impact resistance, wear resistance, self-lubrication and absorb the impact energy. Resistance to impact of UHMWPE came out on top in the whole engineering plastic, 3 - taller than polycarbonate 5 times, even in the - Under the low temperature of 80 ℃ has very excellent resistance to impact.
compared with general engineering plastics, special engineering plastics is a type of the plastic has unique performance, so also known as the high performance engineering plastics or super engineering plastics. Special engineering plastic heat temperature for a long time in general is 150 - More than 250 ℃. In mechanical strength, flame retardancy, low temperature resistance, or other use of performance, generally better than the general engineering plastics. Special engineering plastics synthesis process complex, difficult molding, high processing temperature and the prices are more expensive, so the market relatively small size, but development is very fast.
UHMWPE friction coefficient is very low, and ptfe. Wear resistance is 3 times of nylon, 7 - carbon steel 10 times. Just like ordinary polyethylene, ultra-high molecular weight polyethylene also has excellent electrical insulation, low water absorption and physiological inertia. UHMWPE low thermal deformation temperature, the use of temperature below 100 ℃, over temperature, abrasion resistance has fallen sharply. Low thermal conductivity, thermal conductivity than copper about small - 280 340 times. The melt viscosity and processing more difficult.
with liquid crystal polymer modification, can improve the processing of liquidity, at the same time can improve the mechanical properties and wear resistance. And the relative molecular mass under 600000 PE blend, can improve the processing fluidity, but some mechanical properties decreased. Diatomaceous earth, kaolin as filler, adopt polymerization filling technology, can improve the material hardness, bending strength, bending modulus, and high heat distortion temperature.
ultra-high molecular weight polyethylene, referred to as 'UHMWPE, relative molecular mass is more than 1. 5 million, comprehensive for conventional molecular weight polyethylene does not have the special engineering plastics. PBT composite injection molding processing and excellent performance, widely used in the electronics industry, automobile industry, instrument industry, machinery industry. PBT, dominant in the department of electrical and electronic applications, is widely used as the shell of electrical equipment, high voltage components and structure of the complex electronic components.
the glass bead reinforced, wear resistance can be increased by 40%, thermal deformation temperature of 30 - 40 ℃, and can reduce the cost. In recent years, with the breakthrough of processing technology, make full use of the excellent properties of ultra-high molecular weight polyethylene, has been widely used in the field of more and more. In the textile industry, there are more than 200 need to bear high impact, high speed movement of the textile parts using UHMWPE. In mining machinery, food and food processing, construction machinery and transport machinery, involving the material conveying transmission device and running water production line of standard parts, also USES UHMWPE.
more excellent articles: polyethylene terephthalate, click directly.
http://www。 csssld。 cn//html/2017/Info_0214/494。 HTML
nantong on suye's official website: http://www. csssld。 cn//
the molecular structure of the ultra-high molecular weight polyethylene with ordinary polyethylene are exactly the same, is particularly high molecular weight. At more than 1. 5 million relative molecular mass of UHMWPE, and relative molecular mass 2 million, 3 million, even as high as more than 5 million grade. Ultra-high molecular weight polyethylene performance is very good, especially to impact resistance, wear resistance, self-lubrication and absorb the impact energy. Resistance to impact of UHMWPE came out on top in the whole engineering plastic, 3 - taller than polycarbonate 5 times, even in the - Under the low temperature of 80 ℃ has very excellent resistance to impact.
compared with general engineering plastics, special engineering plastics is a type of the plastic has unique performance, so also known as the high performance engineering plastics or super engineering plastics. Special engineering plastic heat temperature for a long time in general is 150 - More than 250 ℃. In mechanical strength, flame retardancy, low temperature resistance, or other use of performance, generally better than the general engineering plastics. Special engineering plastics synthesis process complex, difficult molding, high processing temperature and the prices are more expensive, so the market relatively small size, but development is very fast.
UHMWPE friction coefficient is very low, and ptfe. Wear resistance is 3 times of nylon, 7 - carbon steel 10 times. Just like ordinary polyethylene, ultra-high molecular weight polyethylene also has excellent electrical insulation, low water absorption and physiological inertia. UHMWPE low thermal deformation temperature, the use of temperature below 100 ℃, over temperature, abrasion resistance has fallen sharply. Low thermal conductivity, thermal conductivity than copper about small - 280 340 times. The melt viscosity and processing more difficult.
with liquid crystal polymer modification, can improve the processing of liquidity, at the same time can improve the mechanical properties and wear resistance. And the relative molecular mass under 600000 PE blend, can improve the processing fluidity, but some mechanical properties decreased. Diatomaceous earth, kaolin as filler, adopt polymerization filling technology, can improve the material hardness, bending strength, bending modulus, and high heat distortion temperature.
ultra-high molecular weight polyethylene, referred to as 'UHMWPE, relative molecular mass is more than 1. 5 million, comprehensive for conventional molecular weight polyethylene does not have the special engineering plastics. PBT composite injection molding processing and excellent performance, widely used in the electronics industry, automobile industry, instrument industry, machinery industry. PBT, dominant in the department of electrical and electronic applications, is widely used as the shell of electrical equipment, high voltage components and structure of the complex electronic components.
the glass bead reinforced, wear resistance can be increased by 40%, thermal deformation temperature of 30 - 40 ℃, and can reduce the cost. In recent years, with the breakthrough of processing technology, make full use of the excellent properties of ultra-high molecular weight polyethylene, has been widely used in the field of more and more. In the textile industry, there are more than 200 need to bear high impact, high speed movement of the textile parts using UHMWPE. In mining machinery, food and food processing, construction machinery and transport machinery, involving the material conveying transmission device and running water production line of standard parts, also USES UHMWPE.
more excellent articles: polyethylene terephthalate, click directly.
http://www。 csssld。 cn//html/2017/Info_0214/494。 HTML
nantong on suye's official website: http://www. csssld。 cn//
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