Ultrahigh molecular weight polyethylene plate has the following characteristics:High wear resistance: ultra-high molecular weight polyethylene sheet is characterized by high wear resistance, even carb
Ultrahigh molecular weight polyethylene plate has the following characteristics:
High wear resistance: ultra-high molecular weight polyethylene sheet is characterized by high wear resistance, even carbon steel, stainless steel, bronze and other metals wear resistance is not as high molecular weight polyethylene sheet. The wear resistance of the material increases with the increase of molecular weight of polyethylene.
Extremely high impact resistance: the relative molecular weight of ultra-high molecular polyethylene sheet is related to its relative molecular weight, when the molecular weight is less than 2 million, its impact strength increases with the increase of molecular weight; When it reaches a peak, its molecular weight will decrease with the increase of molecular weight. This is because the irregularity of the molecular chain prevents the crystallization of its crystals, resulting in a large amorphous region in the macromolecule, which can effectively adsorb a large amount of collision energy. At -40 ° C, ultra-high molecular weight polyethylene has a strong seismic ability, and can also maintain good seismic resistance at -269 ° C, and this excellent low temperature characteristic makes its use at low temperatures expanded to low temperature engineering.
Very low coefficient of friction: Ultra-high density polyethylene has abrasion resistance, low coefficient of friction and strong self-lubrication, making it a very good choice for bearing bushings, sliders and lining materials. The use of ultra-high molecular polyethylene plate as friction element can not only increase the life of wear, but also achieve the purpose of saving energy.
Excellent chemical resistance: ultra-high molecular weight polyethylene, its corrosion resistance is very good, in addition to concentrated nitric acid, concentrated sulfuric acid, all kinds of lye, acid are not corrosive, suitable for high temperature (80 ° C), suitable for concentrated sulfuric acid (80 ° C), suitable for 20% nitric acid, 75% sulfuric acid, water cleaning. However, in aromatics or halogen mixtures (especially at high temperatures), UWPE expands easily, so use extreme caution.
Very low water absorption: Ultra-high polymer water absorption is very low, almost no water absorption, will not expand in water, water absorption is lower than nylon.
Thermal characteristics: According to ASTM(46 kg/cm2) test, the temperature of thermal deformation is 85℃, and the working temperature can reach 90℃ when the load is low; Under certain conditions, higher temperatures can be used, because ultra-high molecular weight polyethylene sheet is a good toughness, so its heat resistance is also very good, even at a temperature of -269 ° C, it can still maintain a high elasticity, without cracks.
