Ultra-high molecular weight polyethylene

Ultra-high molecular weight polyethylene

Ultra-high molecular weight polyethylene (UHMWPE) is a thermoplastic engineering plastic with excellent comprehensive properties. It is usually composed of ultra-high molecular weight polyethylene powder with an average molecular weight of more than 1.5 million and appropriate additives (such as glass beads, glass fiber, mica, Talcum powder, etc. can improve hardness, stiffness and temperature resistance; molybdenum disulfide, silicone oil and special wax can reduce the friction factor, thereby further improving self-lubrication; carbon black or metal powder can improve antistatic properties, electrical conductivity and heat transfer. ; Flame retardant or masterbatch, boron carbide powder and lead powder, etc.) are filled, blended and modified, and then sintered and pressed under high temperature and high pressure. Its basic characteristics are wear resistance, impact resistance, self-lubrication, corrosion resistance, and With comprehensive properties such as impact energy absorption, low temperature resistance, hygienic and non-toxic, not easy to adhere, not easy to absorb water, and low density, it is widely used in Conveying, food, papermaking, textiles, construction, chemical industry, coal mines, power plants, ports, sports, medical care, etc. industry.

产品特点
      超高分子量聚乙烯耐磨损性能居塑料之首,且分子量越大,材料的耐磨性和抗冲击性越高;
      超高分子量聚乙烯的冲击强度是现有塑料中的高值,即使在—70℃时仍有相当高的冲击强度;
      自润滑;
      超高分子量聚乙烯吸水率很低。因此,其物理机械性能与使用的工作条件中的湿度因素无关;
      超高分子量聚乙烯化学性稳定,在一定的温度,浓度范围内能耐酸、碱、盐等各种腐蚀性介质及有机溶剂的腐蚀;
      超高分子量聚乙烯无味、无嗅,本身无腐蚀性,具有生理循环性和生理适应性.
      不粘附性;
      高密度聚乙烯分子量超过50万时,脆化温度降至—140℃。超高分子量聚乙烯甚至可以在液氮作用下,其使用温度可达—269以下℃,仍有一定的机械强度。
超高分子量聚乙烯的应用:
      衬里:料仓、料斗、耐磨耗板、托架、溜槽等回流装置,滑动面,滚筒等;
      食品机械:护轨,星形轮,导向齿轮、辊轮,轴承衬瓦等;
      造纸机械:吸水箱盖板,导流板,刮水板,水翼;
      化学工业:密封填板、填密料、真空模盒,泵部件、轴承衬瓦、齿轮、密封结合面;
      其它:农用机械、船舶零件,电镀工业,较低温机械部件等。

超高分子量聚乙烯
      固定方法及所用元件,应根据被装物料,性能环境,考虑设施条件,技术安装及使用机械性能来选定。
      1、沉头膨胀螺栓固定法
      以下好料的板材先 固定孔,与仓壁巾紧,作好打孔标记取下板材后,用冲击合金钻尖打混凝土仓壁孔,孔径要与膨胀螺栓、膨胀套紧配。板材孔与膨用张栓螺杆紧配。
      2、不锈钢沉头螺栓固定法
      此法适应钢壁,先根据板形,打好固定孔与钢壁配作,外加紧固螺母固紧即可,也可把螺纹切入钢壁减省螺帽。

应用场合

衬里材料

介质

应用结果

氧化铁矿贮斗

超高分子量聚乙烯板材

氧化铁

颗粒度:80% <30

20%细粉<100

产量:13000吨/天

 

烧结厂的矿石贮仓

超高分子量聚乙烯板材

矿石

颗粒度0-1,水分4%-7%

 

煤加工输送溜槽

超高分子量聚乙烯板材

原烟煤

颗粒度:0-0.25-0-0.5

灰份:25%

硫:4%

产量:600吨/天

 

煤碳输送料仓

超高分子量聚乙烯板材

带有煤灰、煤浆、煤炭

颗粒度0-1/4

产量:3000吨/天

 

潮湿的硫酸钙溜槽

超高分子量聚乙烯板材

湿的硫酸钙

颗粒度:泥浆状

 

船仓车箱的衬里

超高分子量聚乙烯板材

 




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