摘要
将适量的聚乙烯(PE)和乙烯-乙酸乙烯酯共聚物(EVA)与一定量的炭黑混合造粒,用塑料挤出机在170℃下挤出圆柱体,并引入两根裸铜线,通过牵引装置将圆柱体拉伸使其产生分子内应力,经一对辊筒压成带状.然后迅速冷却,使导电炭黑聚集在靠近带体表面层.最后挂上一层绝缘皮,便得到自限温加热带.
This paper introduces the production of self-limiting temperature heating belt. Thegrains are produced by extruding a molten mixture of polyethylene(PE),copolymer ofethylene and acetate(EVA),and carbon powder and then extruded into a molten cylindrcal body at 170℃ from the die at the outlet of an extruder,and two copper wires are ledinto a molten cylidrcal body,which is stretched by drawing installation to bring aboutinner stress in the molecules of the body,which is then pressed between nipping rolls toproduce a planar body.Then,it is cooled rapidly in Water,and the carbon powder isconcentrated near the surface of it. Finally,it is co vend with an insulation cover,andthe self-limiting temperature by self heating belt is produced.
关键词
自限温
加热带
生产工艺
温度控制
self-limiting temperature
heating belt
technologieal process,controlling temperature mechanism
drawing