PVC cable material Common issues and solution introduction: 1, cable material gas issues 造 formed issues causes main/primary has 两, 一 is raw materials in water separation high , has can can water separation ultra- 标 raw materials has PVC resin, increase agent, filler and stabilizer, due to add amount comparison large, PVC resin and filler as is focus/key point. this type of 状况, generally in combined process and extrusion machine true 空处会 has performance. 二 is is formulation system stability property or material material high temperature time long, material material separation understanding 而导致 gas 孔出现. issues heavy 时, generally has color 变化. 该 issues main/primary and increase agent product types and PVC resin pellets structure has 关. if increase agent and PVC resin versus property 差, increase agent ratio/proportion high, has issues. its 实PVC resin pellets 形态也 and has very large 关系, if pellets 于紧密, film thick, increase agent easy to pellets in, from effect/influence resin and increase agent separation 子 “结 combined ”. if is resin causes formed 析出, generally also 会出现 material hard or 塑化不 good phenomenon, 出现一 similar 鱼眼状 small pellets material 质. another, material material mixed combined process for effect/influence very large. especially is mixed combined process in various additives add and machine （ temperature degree or front material material mixed combined degree ）, for mixed combined process in increase agent dispersion absorption and cable material issues has obvious effect/influence, mixed material need amount ensure increase agent and PVC resin has mixed combined time and mixed combined temperature degree （90℃ left right ）.
3, cable material surface coarse 糙 surface coarse separation types, types is 疙瘩, types is 麻点. 疙瘩 main/primary is mixed combined dispersion non-uniform powder material poly 集体, extrusion process in can 塑化, by PVC material material 包覆一起由口模 extrusion, in cable material in formed. front to and separation absorption increase agent PVC resin pellets, 也会造 formed phenomenon, generally comparison small. formulation, filler more fine more more, filler if surface treatment good, mixed combined 时效果不佳, 出现团 poly phenomenon rate comparison large, 不 团 poly degree large small and cable material in performance is heavy, is formed is issues. issues versus for need complex 一, generally is and material material in small separation material has 关. this small separation material 质 源于 resin 本身, increase agent, lubricant.
due to extrusion pelletizing production cable material 时, need true 空, 按道理 this small separation material 质应该 by 抽提走, is what also 会出现呢? through analysis 发现, this small separation material more more is true rear, material material in generate 出, very more is amount is very large lubricant, 当然也 has increase agent in. is cable material as is soft products, has a large amount of increase agent, therefore formulation design generally attention/notes lubricant, use low slip agent, this low slip agent melting point low, extrusion rear very more formed separation easy 挥发出, already method troubleshooting, good by melt material material front 行, due to gas specific gravity light, can can to surface, 占据一定空间, and material material by strong/high made 输送, from 模口出 rear it 立即进入空 gas in, in cable material upper lower 点点痕迹.
also has types is, formulation outer lubricated heavy 不够, especially is rear lubricated 不够, melt material material in extrusion process in and machine surface generate viscous phenomenon, formed surface coarse 糙, has 出现一 坑洼. this type of 情况时, generally cable material surface overall 都不会太 good.
4, insulation property good 因 is PVC材质局限 and increase agent and other additives effect/influence causes, PVC cable material insulation property is has 一定限 degree. for/regarding cable material 说, if insulation property obvious 偏差, main/primary has lower several causes:
（1）杂质偏 more. 杂质 mixed for cable material generate effect/influence, more 杂质会造 formed insulation property issues. this has can can 源于PVC resin and various additives, has can can mixed material and add material step/link.
（2） powder pellets coarse. cable material in powder additives generally is need 经 研 abrasion rear use, if 图省事 or machine fault/failure, formed add powder material pellets coarse, for cable material insulation property generate effect/influence.
（3） color agent heavy metal issues. very more material is heavy metal salt type, this heavy metal 离子会 improve/increase cable material conductive property, reduce its insulation property. therefore cable material material selection is very important.
因 is cable material in has ratio/proportion filler, has also has ratio/proportion low increase agent （ or increase agent substitute/replace product ）, 本 不 easy generate phenomenon cable material, in 一定季节也会出现 this category of issues. cable material and packaging process and packaging material has very large 关系, strong/high drying, make its cooling to temperature degree lower again 封口密闭, another also improvement packaging material, increase anti measures. meanwhile, also attention/notes in degradation and surface 附层引起 false phenomenon. cable material issues, generally and PVC resin Model/Grade, increase agent, lubricant, filler and other formulation separation has 关. PVC resin if selection high Model/Grade, due to PVC separation short, cable material property can 就会偏脆. increase agent add amount less, cable material hard, has 时也会 has 偏脆 感觉. more more is is filler add amount large, formed cable material property can decline, strong/high degree good. lubricant is focus/key point, if outer lubricated amount, 往往会造 formed 塑化不 good （塑化 temperature degree low is 塑化不 good main/primary causes ）, cable material obvious strong/high degree good, 发脆. （本文转自 plastics technology inquiry, 仅供参考学习. ）
EN
