一般而言，塑料可分为两大类：热塑性塑料及热固性塑料
热塑性塑料在常温下为颗粒状，加热到一定温度后变成熔融状态，将其冷却后则固化成型，若再次加热则又会变成熔融状态，可进行再次塑化成型。因此，热塑性塑料可经加热熔融而反复固化成型，所以热塑性塑料的废料通常可回收再利用，即有所谓的“二次料”之称
热固性塑料则是加温到一定温度后变成固化状态，即使继续加热也无法改变其状态。因此。热固性塑料无法经再加热来反复成型，所以热固性塑料的废料通常是不可回收利用的。

In general, the plastic can be divided into two broad categories: thermoplastic and thermosetting plastic

Thermoplastics at room temperature for granular, into molten state after heated to a certain temperature, will be its cooling after curing, if reheating and becomes a molten state, can be plasticizing forming again. Therefore, thermoplastic curing, by heating the molten and repeated so thermoplastic waste can be recycled, usually with the so-called "secondary material," said

Thermosetting plastic is heated to a certain temperature to curing condition, even continue heating can change its state. So. Thermosets cannot by heating forming over and over again, so the thermosetting plastic waste usually cannot be recycled.

一、热塑性塑料

1）泛用塑料

PE,PP,PS,PVC,ABS,PMMA,TPU

2）工程塑料

PA,POM,PET,PBT,PC,PPO,PPS,LCP,PEEK,POB,TPI,PPA,PCT,PEN,PEK,PTFE,PTES,PSF,PES,PEI,PAI,PAR

3）合胶

PPO+PS,PC+ABS,PC+PBT,PC+PET,PA+PP,PBT+PET

二、热固性塑料

UP,EP,PF,UF,SI,PU,MF,PI,PABM,BT,DAP