Shanghai Daoqin Plastics Co., Ltd.

      very more 人问pvc is what material? pvc is what? PVC is poly chlorine dilute （polyvinyl chloride） plastics shrink 写. this type of let 人欢喜 let plastics products its is types ethylene polymer 质.
　　 simple 说, salt water solvent liquid in electrical function chemical separation understanding. this process generate chlorine, property and hydrogen gas. 精炼, 裂化石油 or can generate ethylene. chlorine and ethylene mixed combined rear, generate chlorine ethylene; chlorine ethylene also can generate chlorine ethylene 基, it is polyvinyl chloride (PVC) basic formed separation. polymerization process will chlorine ethylene separation 子连接 in 一起组 formed polyvinyl chloride (PVC) 链. this type of methods formed polyvinyl chloride (PVC) white powder 末状. it is can mono use, is can and its it formed separation mixed combined formed many product. 　
　　 chlorine ethylene most is in 1835 year in Justus von Liebig实验室 combined formed 出. polyvinyl chloride (PVC) is 由Baumann in 1872 year combined formed. is to 19世纪20 year in USA production 出 第一 polyvinyl chloride (PVC) product, in lower 20 year inner Europe 才开始 large production.
　　 poly chlorine dilute tool has raw materials 丰富（石油, 石灰石, 焦炭, salt and gas ）, manufacturing process formed 熟, price low 廉, applications and other features, already formed is world upper 仅次于 polyethylene (PE) resin large general purpose resin, world combined formed resin 总消费 amount 29%. polyvinyl chloride (PVC) easy processing, can through pressure, combined, injection molding, 挤塑, calendering, blow molding in and other methods processing. polyvinyl chloride (PVC) main/primary used for production 人造革, film, electrical sleeve/set and other plastics soft products, can production sheet/plate 材, 门窗, pipeline and and other plastics hard products. 　

　　 poly chlorine dilute tool has flame retardant （ flame retardant value is 40 above ）, chemical resistant product property high （ resistant concentrated salt acid, concentrated degree is 90％ 硫 acid, concentrated degree is 60％ 硝 acid and concentrated degree 20％ hydrogen oxidation 钠）, machine strong/high degree and electrical insulation property good advantages. its heat resistant property relatively 差, soft is 80℃, 于130℃开始 separation understanding color, 并析出HCI.
its 实, this more, most understanding to is: in provide to type more 方便 之 rear, PVC also has it most disadvantages; it is for ring most tool bad force plastics products. PVC production, use and process in 均会导致 has chlorine material 释放. this 毒素会 very light easy water, gas and material in, for ring formed large loss 害. but also 据说PVC间接 and 癌症, 荷尔蒙失调, defect, 糖尿病, loss and 免疫抑 made rear has 关. in PVC材质 toys in, 邻苯二甲 acid ester by used as soft agent, tool has 健康意识 家 long already 经开始担心 this type of material is for 他们 孩子 has 害: is 儿童会咀嚼 and 吮吸他们 toys, if this additives has what to do? 　　
　　 is what poly chlorine dilute by this also also 恨呢? its 实, chlorine in poly chlorine dilute in function is let 人们爱恨交 add, large more day use plastics products is carbon and hydrogen is main/primary formed 元素. polyvinyl chloride (PVC) different is remove carbon, hydrogen outer also has chlorine （ large weight 57%）. due to separation in chlorine in make polyvinyl chloride (PVC) function especially 丰富, is it can make polyvinyl chloride (PVC) and other many material versus 兼容. chlorine formed separation also has 助于延缓 polyvinyl chloride (PVC) 燃烧, also can it as in plastics recycling 时 自动 classification system in 我们区 separation polyvinyl chloride (PVC) "标记". also can use multiple technology development polyvinyl chloride (PVC) manufacturing methods, 几乎不 need use can can made formed most product 形态. therefore, is chlorine 元素 存 in make poly chlorine dilute has this fast speed and vast application areas. 　　
　　但, meanwhile, 我们不 can 忘记: chlorine by 人们称之 is "PVC in structure mono 元". it is PVC污染 ring 境 主犯. upper it is very more 声名狼藉 毒 property material basic formed separation, 如CFC（ fluorine chlorine carbon ）, 二恶英污染, PCB（ more chlorine 化联二苯） and DDT杀虫 agent. a large amount of chlorine 化毒素入侵空 gas, water and material in. this chemical material in more 数-- has machine chlorine --不 easy separation understanding, in ring in 保留几十 year, type and material can has will it from inner troubleshooting ……, this 样, 危险就 this 样 埋伏 lower. 　 
　　PVC production in 20世纪60 year to speed development. other use industrial chlorine product by prohibited （如 more chlorine 化联二苯（PCB）, fluorine chlorine carbon （CFC） and chlorine solvent agent and other ）, chlorine industrial toward PVC以消 consumption its outer chlorine. PVC production increase, especially is in and 拉丁美洲. in world upper ultra- 30％ chlorine product by use production PVC.
 

PVC plastics material and chemical property can indicators brief introduction

　　化 Scientific Names 称: polyvinyl chloride (PVC)

　　英文名称:Poly Vinyl Chloride （PVC）

　　 specific gravity:1.38克/立方 cm molding shrinkage:0.6-1.5% molding temperature degree: 160-190℃

　　 features: force property can, electrical property can excellent 良, resistant acid alkali force strong/high, chemical stability property good, soft low. made as thin sheet/plate, electrical cable insulation 层, seals and other.

molding features:

　　1, 无定形 material, wet small, flow property 差. is high flow property, anti 止发生 bubbles, plastics can drying. mold system coarse short, gate 截面宜 large, has 死角. mold must cooling, surface 镀铬.

　　2, due to its property and flow property features, most good using/adopting specialized equipment and mold. has product must according to need add different types type and amount additives.

　　3, easy separation understanding, in 200 degree temperature degree lower and 钢. copper more easy separation understanding, separation understanding 时逸出腐蚀. property gas 体. molding temperature degree scope/range small.

　　4, using/adopting screw injection machine nozzle 时, 孔径宜 large, anti 死角滞 material. good belt/tape parts, has parts preheating.

polyvinyl chloride (PVC) （PVC） plastics typical applications scope/range:

　　供 water pipeline, use pipeline, 房屋墙 sheet/plate, use machine housing/shell 体, electronics product packaging, medical devices, food packaging and other.

injection molding process conditions:

drying 处理: usually need drying 处理.

熔化 temperature degree: 185~205℃

mold temperature degree: 20~50℃

injection pressure: can large to 1500bar

holding pressure pressure: can large to 1000bar

injection speed degree: is 避免材 material degradation, generally need use versus injection speed degree.

runner and gate: has gate can use. if processing relatively small parts, most good use type gate or 潜入式 gate; for/regarding relatively thick parts, most good use gate. type gate or 潜入式 gate most small 直径应 is 1mm;扇形 gate thick degree can small 于1mm.

chemical and material features:

　　 rigid property PVC is use most plastics material 之一. PVC材 material is types non crystallization property material. PVC材 material in use in add stabilizer, lubricant, processing agent, color material, impact resistant agent and its it additives. PVC材 material tool has easy property, high strength, resistant gas 侯变化 property and excellent 良 几何 stability property. PVC for oxidation agent, also agent and strong/high acid has very strong/high resistant force. however it can by concentrated oxidation acid concentrated acid, concentrated acid and suitable and 芳香烃, chlorine 化烃接触 场 combined. PVC in processing 时熔化 temperature degree is non important process parameters, if parameters will 导致材 material separation understanding issues. PVC flow features versus 当差, its process scope/range very narrow. especially is large molecular weight PVC材 material more difficult processing (this type of material usually need add lubricant improvement flow property), therefore usually use is small molecular weight PVC材 material. PVC shrinkage rate versus low, generally is 0.2~0.6%.