Shanghai Daoqin Plastics Co., Ltd.

plastics and most essence difference in plastics 发生形变时塑 property deformation, 而橡胶 is elastic property deformation. 换句话说, plastics deformation rear easy 恢复原状态, 而橡胶 versus for 说就容 easy more. plastics elastic property is very small, usually small 于100%, 而橡胶 can to 1000%甚至 more more. plastics in molding upper large more molding process product process 也就完毕; 而橡胶 molding process rear also need process.

    plastics and 橡胶同 belongs to polymer/macromolecule material, main/primary carbon and hydrogen types 原子组 formed,另 has 一 含 has a small amount of oxygen, nitrogen, chlorine, silicon, fluorine,硫 and other 原子, its property can 特殊, applications especially. in normal temperature lower, plastics is solid 态, very hard,不 can tensile deformation.而橡胶 hardness high, has elastic property, can tensile long,停止 tensile also can 回复原状. this is due to it separation structure different formed.另一 different is plastics can more recycling heavy use,而橡胶则不 can recycling use, can processing made formed recycled 胶,然 rear can use. plastics in 100 more degree 至200 degree 时 形态 and in 60至100 degree 时 形态 versus 似. plastics 不包括橡胶.

complex 说:
广义 说, its is plastics types, plastics 包括橡胶. detailed introduction 之

一, 生胶 形 formed:
生胶 can separation is 天然橡胶 and combined formed 橡胶两 large type:
1.天然橡胶:由橡胶树 dry 切割口, 收集 流出 胶浆, 经 杂质, solid, 烟熏, drying and other processing 程序, formed material.
2. combined formed 橡胶:由石化 industrial generate product, different demand, combined formed different material property material. commonly used 如:SBR, NBR, EPDM, BR, IIR, CR, Q, FKM and other. combined formed methods 差异, type material can separation types different 生胶, also formulation setting, type type material, can formed types combined products demand material.

天然橡胶 自 hot belt/tape and hot belt/tape 橡胶树. due to in industrial, 农业, national defense field/area in has important function, therefore it is important strategy material 资, this make 缺乏橡胶资源 国家 rate research development combined formed 橡胶.

二, chemical formed separation
through for 天然橡胶 chemical formed separation 进行剖析, it basic formed is 异戊二烯. is 启发人们 use 异戊二烯 as is mono 体进行 polymerization reaction, to combined formed 橡胶, is 异戊橡胶. 异戊橡胶 structure and property can basic upper and 天然橡胶 same. due to 当时异戊二烯 can from 松节油 in obtain, raw materials to made, butadiene 则 源丰富, therefore butadiene is development series combined formed 橡胶. 如顺丁橡胶, 丁苯橡胶, 丁腈橡胶 and chlorine 丁橡胶 and other.

随 石油 chemical industrial development, from gas, gas high temperature understanding and separation pure, can to ethylene, propylene, 丁烯, 异丁烯, 丁烷, 戊烯, 异戊烯 and other various gas 体, it is manufacturing combined formed good raw materials.

world output/production volume in, 天然橡胶仅占15％ left right, its is combined formed 橡胶. combined formed product types very more, property can 各异, in many combined can 代替, ultra- 天然橡胶. combined formed can separation is general purpose and specialty 橡胶. general purpose use amount relatively large, 例如丁苯橡胶占 combined formed output/production volume 60％; its is 顺丁橡胶, 占15％; in addition also has 异戊橡胶, chlorine 丁橡胶, 丁钠橡胶, 乙丙橡胶, 丁基橡胶 and other, it general purpose 橡胶.

三, raw materials made:
橡胶 raw materials made can separation basic process:
1.塑炼:塑练 is will 生胶剪断, will can 塑化, uniform 化, 帮助配 combined agent mixed as 业. its is improvement product dispersion, anti as in generate scratch hot, 而致橡胶发生 scorching/burn marks phenomenon, 进而改变橡胶 processing property.
2. mixing/compounding: mixed is will combined material uniform mixed 入塑炼完 formed in, mixing/compounding excellent poor, effect/influence products 良否. material dispersion 不均, separation structure method full crosslinked, 橡胶则无 method to material property.
3. pressure 出: mixing/compounding formed 生胶, pressure as 业, will material in has more gas pressure 出, formed thick degree, 以利于 mold inner molding as 业.

四, molding:
生胶 separation structure is saturated and long elastomer, therefore molding need parts in, has 适当 药 product add material and outer in ring factors (如 time, temperature degree, pressure and other), will its saturated and bad, again heavy new combined is saturated and 键, true 空辅助, will inner 含 空 gas full 逼出. 如此, can molding 橡胶, its has features. its molding process has 任何缺失(如 formulation 错误, time 不足, temperature degree and other), can formed material property 流失, more material 释出, deformation, aging accelerated, types types heavy defect phenomenon generate.

五, aging phenomenon:
依橡胶 formed product ring conditions, time 经, crazing or hard 化, material property and other phenomenon, is aging phenomenon. aging causes, has external factors and internal factors:
1. external factors: external factors has oxygen, oxidation material, oxygen, hot, light, 放射线, machine property fatigue, processing process and other.
2. internal factors: internal factors has types type, molding methods, 键结程 degree, combined material types type, processing engineering in and other.
aging phenomenon anti 止, heavy positive 确 胶 types selection and formulation design, outer add production 理念. 如此才 can increase made formed product lifespan, 并发挥应 has function.

六, products basic features:
1.橡胶 products molding 时, large pressure pressure made, its elastomer 俱备之 inner poly force method remove, in molding 离模时, generate unstable shrinkage (橡胶 shrinkage rate, types different has 差异), 必需经 一段 time rear, can and stability. therefore, 当一橡胶 products design 之初, formulation or mold, 都需谨慎计算配 combined, 若否, easy generate products dimensions unstable, formed products quality low 落.
2.橡胶 hot solvent hot solid property elastomer, plastics belongs to hot solvent cold solid property. 橡胶因硫化 material types type different, its molding solid temperature degree scope/range, has versus 当 差距, can gas 候改变, inner temperature wet degree effect/influence. therefore made formed product production conditions, 需随时做适 degree adjustment, 若无, can can generate products quality 差异.

七, 橡胶贴 combined use di 面胶区 separation:
generally industrial use di 面胶, can separation pressure force and 橡胶胶系两 large type. 而此两 large type, also can separation has and 无基材两 types type 态(has 基材:于胶 in add upper 一层棉质, add strong/high di 面胶本身胶 amount and strong/high degree, 无基材: pure 胶质, ensure di 面胶之 transparent degree). 因橡胶胶系 主体 is CR, used for products, easy and 橡胶之硫化 system, generate reaction 而变黄. therefore relatively color products, using/adopting pressure force in has di 面胶(同 types type di 面胶, has or 无基材, its 本身胶质 thick degree separation.