What are the characteristics of insulating materials:

① polyimide glass fiber most of the plastic light, chemical stability, not rust;
② good impact resistance;
③ has good transparency and abrasion resistance;
④ good insulation, low thermal conductivity;
⑤ general shape, good coloring, low processing costs;
⑥ most of the plastic heat resistance is poor, thermal expansion rate, easy to burn;
⑦ dimensional stability is poor, easy to deformation;
⑧ most of the low temperature resistance of plastic poor, low temperature brittle;
⑨ easy to age;
⑩ some plastic soluble in the solvent.