PPA 美国杜邦 HTNFR52G30NH NC010 阻燃级，热稳定性，耐老化

主要特性: PPA强度、韧度和硬度优越性能，以及其良好的耐热件，耐化学性及抗开裂能力;

PPA由于高温和高湿环境下仍能保持强度和硬度，可在传统的尼龙和聚酯所无法随的就用中替换金属;

PPA塑料还具有优越的表面光泽性。可以对其进行着色而避免了表面喷涂，从而有助于降低表面划痕和刮痕的明显程度;

PPA塑料还具有良好的可加工性，并允许短的注塑循环时间;

与PA46相比: PPA具有比PA46更高的热稳定性； PPA具有比PA46更好的CTI/耐电弧能和红外同流能力；PPA具有比PA46更好的耐化学性.

注塑加工： 绝大多数PPA树脂是用传统注塑法加工的。把 PPA原料预干燥到低于0．1%的湿度水平，装入热密封的金属村里袋子或盒子内，这些容器能保证PPA原料在加工前不用再干燥。加工工艺可接受的湿度水平是0．15%或更低。加工湿的树脂能使分子量降低，造成相应的机械性能上的损失。使用干燥剂贮斗式干燥器，在175°F条件下很容易把树脂干燥到露点湿度达一25°F甚至更低。

Main characteristics: PPA has excellent strength, toughness andhardness, as well as its good heat resistance, chemical resistanceand cracking resistance;

Because PPA can still maintain strength and hardness under hightemperature and high humidity, it can replace metal in the use thattraditional nylon and polyester can not follow;

PPA plastic also has excellent surface gloss. It can be coloredto avoid surface spraying, thus helping to reduce the apparentdegree of surface scratches and scratches;

PPA plastic also has good processability and allows shortinjection cycle time;

Compared with PA46: PPA has higher thermal stability than PA46;PPA has better CTI/arc resistance and infrared co-current capacitythan PA46; PPA has better chemical resistance than PA46

Injection molding: Most PPA resins are processed by traditionalinjection molding. Pre-dry the PPA raw material to a humidity levelbelow 0.1%, and then put it into a heat-sealed metal bag or box.These containers can ensure that the PPA raw material does not needto be dried before processing. The acceptable humidity level forthe processing process is 0.15% or less. Processing wet resin canreduce the molecular weight and cause the corresponding mechanicalproperty loss. Using desiccant bucket dryer, it is easy to dry theresin to the dew point humidity of - 25 ° F or even lower at 175 °F.