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EVA plastic raw materials raw materials classification and concept
1. plastics raw materials main/primary formed is resin.
2. plastics raw materials: is polymer/macromolecule combined formed resin (polymer) is main/primary formed 份渗入 various material or additives, in temperature degree, pressure lower tool has can property and flow property, can by formed 一定形状,且 in conditions lower maintain 形状不变 材 material.
3. polymer:指 polymerization process generate pure material or polymerization material.无论天然 resin also is combined formed resin polymer/macromolecule combined poly material,简称 high poly material.
4. plastics for electrical, hot,声 tool has good insulation property: electrical insulation property, resistant electrical property,EVA plastics raw materials temperature,隔声,吸音,吸振,消声 property can 卓越.
plastics Raw Materials large is from 一 油 type in 提炼出, most 熟悉 部 separation PC material is from in 提炼出,PC material in 烧 时候 has 一股汽油味;ABS is from in 提炼出, ABS in 烧完灭掉 时候会呈烟灰状;POM is from gas 提炼出, POM in 烧完 时候会 has non 常臭 瓦斯味．
plastics raw materials classification
polymer is many relatively small structure simple small separation 子(monomer), 藉共价键 组 combined formed. polymer types type more, generally is for hot 之变化 classification, it can separation is large type ︰
一, hot solid property plastics (Thermoset plastics)︰指 is add hot rear, make separation 子构造结 combined formed type 态, 一但结 combined formed polymerization 体, make again add hot 也不会 soft 化, 显示出 谓 [non can 逆变化], is separation 子构造发生变化(chemical 变化) 致.
二, thermoplastic property plastics (Thermo plastics)︰指 add hot rear 会熔化, can flow mold cooling rear molding, again add hot rear also 会熔化 plastics, can use add hot and cooling, make its generate [can 逆变化](liquid 态←→ solid 态), is material 理变化.
according to application scope separation main/primary has general purpose plastics 如PE/PP/PVC/PS and other, engineering plastics 如ABS/POM/PC/PA and other commonly used types. another also has 一 特殊 plastics high temperature resistance high wet and corrosion resistant and other is applications modified made plastics.
