Shanghai Daoqin Plastics Co., Ltd.

brief introduction

polybutylene terephthalate (PBT) (英文名polybutylene terephthalate; 简称PBT） also poly 四亚甲基 for 苯二甲 acid ester （polytetramethylenene terephthalate）, is through for 苯二甲 acid and 1, 4- butanediol polycondensation made formed polyester. most important thermoplastic polyester, large engineering plastics 之一.

PBT is white semi transparent to transparent, semi crystallization type thermoplastic polyester. tool has high heat resistant property, can in 140℃ lower long as, tough property, fatigue resistance, lubricated, low friction coefficient. resistant strong/high acid, strong/high alkali, can resistant has machine solvent agent, can 燃, high temperature lower separation understanding. due to this excellent property can, in automotive, machine equipment, precision device parts, electronics electrical appliances, textile and other field/area to application, in recent years in technology, application, production capacity, output/production volume and other to fast development, especially is in China. 2003 year full 球PBT production capacity 约58 10,000 tons / year, 2010 year already ultra- 120 10,000 tons / year. China 2011 year production capacity ultra- 30 10,000 tons / year, formed is full production capacity most more 国家.

features

1. mechanical properties: strong/high degree high, fatigue resistance, dimensions stability, creep small （ high temperature conditions lower less has 变化）;

2. heat resistant aging property: reinforcement rear UL temperature degree 指数达120~140℃（户 outer long aging property very good ）;

3. resistant solvent agent property: force cracking;

4. for water stability property: PBT遇 water easy separation understanding;

5. electrical properties:

① insulation property can: excellent 良（潮 wet, high temperature can maintain electrical property can stability , is manufacturing electronics, electrical parts 理想材 material ）;

②介 electrical 系数: 3.0-3.2;

③ resistant electrical property: 120s

6. molding processing property: equipment injection molding or 挤塑. due to crystallization speed degree fast, flow property good, mold temperature degree ratio other engineering plastics requirements low. in processing thin made parts 时, 仅需几秒钟, for large parts need 40-60s即 can.

application

1. electronics electrical appliances: connectors, parts, use electrical appliances, parts parts, small type electrical cover/cap or （ heat resistant property, flame retardant property, electrical insulation property, molding processing property ）;

2. automotive:

① outer parts: main/primary has 转角格珊, machine hot and other;

② internal parts: main/primary has inner strip/profile, water device and control system 阀;

③ automotive electrical appliances parts: automotive 点火线圈绞 tube/pipe and various electrical appliances connectors and other.

（PBT used for automotive upper also and nylon, poly carbon and polyoxymethylene (POM), low warpage property PBT 出现, in the future will in automotive parts upper to more more application ）

3. machine equipment: frequency magnetic belt/tape machine belt/tape 式传动轴, electronics machine 罩, water lamp covers, electrical 熨斗罩, machine parts and a large amount of gears, 凸轮, 按钮, electronics table/sheet outer housing/shell, versus machine parts （ has heat resistant, flame retardant requirements ）