Tip point nozzle will leave minor point mark on the surface of products . it has plastic cement heat insulations . it applies to all of plastic materials 点浇口热咀,在产品表面留下极小的点状浇口痕迹。热咀前端有隔热层,适于非结晶性及半结晶性塑胶
On the basis of plenty of relative references about conductive composites of polymer matrix / carbon black . a new idea has been put forward for conductive composites , that is , by adding organic crystals into amorphous pu matrix ( coating ) without ptc effect to prepare coatings with ptc effect 本文在查阅大量国内外有关聚合物cbptc导电复合材料文献资料的基础上,提出向无ptc效应的非结晶性聚氨酯( pu )涂料基体中加入有机晶体以获得具有ptc效应的涂料的设想。