Shanghai Daoqin Plastics Co., Ltd.

一, PET材 material overview

polyethylene terephthalate (PET) （polyethylene terephthalate, 简称PET). PET is white or shallow color, high degree crystallization polymer.

PET main/primary used for bottle grade polyester (广泛 used for various material especially is carbon acid material packaging ), polyester film ( main/primary used for packaging materials, sheet/slice and magnetic belt/tape and other )以 and use 涤纶.

in addition, has to 5%PET as is engineering plastics used for electronics, electrical appliances, automotive industrial and other field/area.

二,  PET property can features

1. advantages

● heat resistant property 佳, glass fiber reinforced rear heat deflection temperature (HDT) can 达220℃ above;

● heat stabilized property good, especially tool has relatively low hot rate and dimensions shrinkage rate;

● mechanical properties excellent, especially tool has high rigid property and hardness

● chemical resistant product, solvent agent, weather resistance 佳;

●介 electrical strong/high degree high, electrical properties 佳;

● can use ultra- 声波 welding, rear processing easy;

● property ratio high, in engineering plastics in 处于首位.

2. disadvantages

● separation has ester 键, in strong/high acid, strong/high alkali and water function lower 会发生 separation understanding

●材 material for relatively is 敏感

● crystallization speed rate small, molding processing difficult, temperature degree high, production cycle long

三,  PET modified material series product

四, modified PET材 material main applications

◆ in electronics electrical appliances industry application

◆ in automotive industrial application

1． in electronics electrical appliances industry application

PET in strong/high degree and resistant temperature 方面都 need excellent 于PBT, in crystallization speed degree and products surface 效果方面 poor 于PBT, therefore PET generally used for PBT无 method to strong/high degree and resistant temperature requirements products.

（1）直发 device

key/critical requirements:

● surface gloss degree high, products appearance, color can meet/satisfy demand

● heat resistant property 佳, 230-245 ℃烘烤不 deformation

● heat stabilized property good, especially tool has relatively low hot rate and dimensions shrinkage rate

● mechanical properties excellent 良, tough property good, combined upper filament, surface spray coating and electroplating

● relatively fast crystallization speed degree, flow property good, molding property excellent 良

● excellent flame retardant property can, UL 94V0 grade 别

（2）Bobbin

★名词 understanding 释:

BOBBIN—— skeleton/framework, also pressure device skeleton/framework, or pressure device 线架, 英文统称 is Bobbin, is pressure device structure formed separation.

key/critical requirements:

● 锡炉420℃×2秒不发黑, deformation small, 插针拉拔 force maintain property good

●浸 insulation rear, 130℃烘烤1 small 时, deformation small, color small

● heat stabilized property good, especially tool has relatively low hot rate and dimensions shrinkage rate

● heat resistant property 佳, heat deflection temperature (HDT) can 达220℃ above

● relatively fast crystallization speed degree, flow property good, molding property excellent 良

● excellent flame retardant property can, UL 94V0 grade 别

（3） energy saving or 白炙灯头

key/critical requirements:

●需 through 250℃球 pressure testing

● high temperature resistance yellowing, 230℃烘烤168 small 时, deformation color small

● heat stabilized property good, especially tool has relatively low hot rate and dimensions shrinkage rate

● tough property good, combined upper filament, surface spray coating and electroplating

● relatively fast crystallization speed degree, flow property good, molding property excellent 良

● excellent flame retardant property can, UL 94V0 grade 别

（4） other electronics electrical appliances product

2. PET材 material in automotive industrial application

PET材 material tool has good resistant acid type, type can force, good can processing property, mold small, modified rear tool has high strength and high resistant temperature features, in certain parts upper can nylon, in cost upper has very large advantages.

（1）尾 gas recycling （EGR）部 parts outer housing/shell

key/critical requirements:

● long high temperature resistance

● dimensional stability good

● excellent inner 置二次 molding property can

（2）串联式 made device add force device

key/critical requirements:

● high strength, high toughness

● dimensions stability

● resistant fatigue

（3） bearings parts

key/critical requirements:

● high rigidity, high strength

● excellent dimensional stability

●卓越 fatigue resistance can

（4）吊窗提手 gears outer housing/shell

key/critical requirements:

● high rigidity

● dimensions stability

（5） its it parts