（1）塑料粒子的品种的选择

(1) selection of the varieties of plastic particles

塑料粒子要选择与改性目的性能最接近的品种，这样做的好处是可以节省助剂的添加量，以降低制作成本和减少工艺流程。

In order to reduce the production cost and reduce the process flow, the plastic particles should choose the varieties closest to the modified purpose.

最常见的例子：想要得到耐磨改性的品种，塑料粒子（树脂）要首先考虑选择三大耐磨树脂PA、POM、UHMWPE;再如透明改性，树脂要首先考虑选择三大透明树脂PS、PMMA、PC。

The most common example: to get a variety of wear-resistant modified, plastic particles (resin) should first consider the choice of three major wear resistant resin PA, POM, UHMWPE; again such as transparent modification, the resin should first consider the choice of three large transparent resin, PS, PMMA, PC.

(2)树脂流动性的选择

(2) choice of resin fluidity

配方中各种塑化材料的粘度要接近，以保证加工流动性。对于粘度相差悬殊的材料，要加过渡料，以减小粘度梯度。

The viscosity of various plasticizing materials in the formulation is close to ensure processing fluidity. For different materials with different viscosity, transitional materials should be added to reduce the viscosity gradient.

（3）塑料分成高流动性塑料、低流动性塑料和不流动性塑料

(3) plastics are classified into high mobility plastics, low mobility plastics and illiquid plastics.

具体如下：

The following is as follows:

高流动性塑料——PS、HIPS、abs、PE、PP、PA等。

High mobility plastics -- PS, HIPS, ABS, PE, PP, PA and so on.

低流动性塑料——PC、MPPO、PPS等。

Low fluidity plastics - PC, MPPO, PPS and so on.

不流动性塑料——聚四氟乙烯、UHMWPE、PPO等。

Non fluidity plastics -- polytetrafluoroethylene, UHMWPE, PPO and so on.

不同的加工方法所需用的流动性不同，所以牌号分为注塑级、挤出级、吹塑级、压延级等。

The fluidity of different processing methods is different, so the grades are divided into injection grade, extrusion stage, blow molding stage, calender level, etc.

不同改性目的要求流动性不同，如高填充要求流动性好。

Different modification purposes require different mobility, such as high filling and good liquidity.

(4)树脂对助剂的选择性

(4) selectivity of resin to auxiliaries

如PPS不能加入含铅和含铜助剂，PC不能用三氧化锑，这些都可导致解聚。同时，助剂的酸碱性，应与树脂的酸碱性要一致，否则会起两者的反应。

If PPS cannot be added to lead and copper containing additives, PC can't use three antimony oxide, which can lead to depolymerization. At the same time, the acidity and basicity of the auxiliaries should be consistent with the acid-base properties of the resins, otherwise they will react.