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波纹管含水较高的原因!

作者: admin    来源:http://www.laobingguandao.com  时间:2019-11-29    人气:
  波纹管中常会有少量的水分和挥发分。水分是大气中渗入的水汽或制造波纹管时没有排玩的游离水分,挥发分是指波纹管在受热时所放出的低分子物。
  There is often a small amount of water and volatile in the bellows. Water is the water vapor infiltrated into the atmosphere or the free water that is not discharged when making bellows. Volatile matter refers to the low molecular matter released by bellows when heated.
  存在水分和挥发分的原因主要是分子量偏低,存放不当,尤其是吸水性物料更不能放在潮湿不通风的场地;再者,就是挤出加工前复合物未经干燥处理。水分和挥发分过多时,将产生流动性能变差、多孔易破裂、翘曲、表面波纹、闷光、电性能和力学性能降低等缺陷。如果是由于波纹管包装袋破损等原因造成树脂潮湿,可用排气型挤出机挤出成型。
  The main reason for the existence of moisture and volatile is the low molecular weight and improper storage, especially the absorbent materials can not be placed in the wet and airless site; moreover, the composite is not dried before extrusion. When there is too much water and volatile, the flow performance will be poor, porous and easy to crack, warping, surface ripple, dull light, electrical and mechanical properties will be reduced. If the resin is wet due to the damage of bellows packaging bag, it can be extruded by exhaust extruder.
HDPE双平壁钢塑复合缠绕管
  如果要使用普通单螺杆挤出机生产,原料应该先进行干燥处理,排出树脂中的水分。如果潮湿的原料较少,用烘箱干燥处理即可;如果潮湿料较多,应该选用干燥机对原料进行干燥处理。
  If we want to use the ordinary single screw extruder to produce, the raw materials should be dried first to discharge the moisture in the resin. If there are less wet materials, dry them in an oven; if there are more wet materials, use a dryer to dry them.
  本文由http://www.laobingguandao.com发布
  This article is published by http://www.laobinguandao.com

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