PE聚乙烯是***结构简单的高分子，也是应用***广泛的高分子材料。
PE polyethylene is a simple polymer with *** structure and is widely used in ***.
它是由重复的–CH2–单元连接而成的。聚乙烯是通过乙烯（CH2=CH2）的加成聚合而成的。
It is made up of repetitive CH2 - units. Polyethylene is made by addition polymerization of ethylene (CH2=CH2).

PA66应用
PA66 application
广泛用于制造机械、汽车、化学与电气装置的零件，如齿轮、滚子、滑轮、辊轴、泵体中叶轮、风扇叶片、高压密封围、阀座、垫片、衬套、各种把手、支撑架、电线包内层等。
It is widely used to manufacture machinery, automobile, chemical and electrical equipment, such as gear, roller, pulley, roller shaft, impeller in pump body, fan blade, high pressure seal enclosure, valve seat, gasket, bushing, various handle, support frame, wire bag inner layer, etc.
注模条件
Injection molding condition
***压力
Injection pressure
通常在750~1250bar，取决于材料和产品设计。
Usually in 750~1250bar, it depends on material and product design.
***速度
Injection speed
高速（对于增强型材料应稍低一些）。
High speed (for enhanced materials should be slightly lower).
流道和浇口:由于PA66的凝固时间很短，因此浇口的位置非常重要。浇口孔径不要小于0.5*t（这里t为塑件厚度）。
Runner and gate: because the solidification time of PA66 is very short, the location of gate is very important. The gate aperture should not be less than 0.5*t (here t is the thickness of the plastic part).
PC‖塑料，学名是聚碳酸酯，是分子链中含有碳酸酯基的高分子聚合物，根据酯基的结构可分为脂肪族、芳香族、脂肪族-芳香族等多种类型。其中由于脂肪族和脂肪族-芳香族聚碳酸酯的机械性能较低，从而限制了其在工程塑料方面的应用。目前仅有芳香族聚碳酸酯获得了工业化生产。由于聚碳酸酯结构上的特殊性，现已成为五大工程塑料中增长速度***快的通用工程塑料。苹果ipod和ibook外壳也使用此塑料原料是石油 由于无色透明和优异的抗冲击性 广泛应用于水瓶制作等,用于生产***...用于航空、航...用于包装领域,用于电子电器...用于光学透镜...用于光盘的基...PC‖在汽车中的...
PC plastic, which is called polycarbonate, is a polymer containing carbonate in the molecular chain. According to the structure of the ester, it can be divided into aliphatic, aromatic, aliphatic and aromatics. Among them, the mechanical properties of aliphatic and aliphatic aromatic polycarbonate are relatively low, which limits their application in engineering plastics. At present, only aromatic polycarbonate has been industrialized. Due to the particularity of polycarbonate structure, it has become the general engineering plastics with the fastest growth rate of *** in the five major engineering plastics. Apple iPod and iBook shell also use this plastic material to be widely used in water bottle production due to its colorless transparency and excellent impact resistance. It is used in the production of Medical... For ***iation, n***igation, for packaging, for electronic appliances... For optical lenses... The base of the optical disc, PC, in the car...

POM☆的疲劳强度十分突出，10交变载荷作用后，疲劳强度可达35MPa，而PA和PC‖仅为28MPa。POM☆的蠕变性与PA相似，在20℃、21MPa、3000h时仅为2.3%，而且受温度的影响很小。POM☆的摩擦因数小，耐磨性好POM☆的耐候性不好，长期在紫外线作用下，力学性能下降，表面发生粉化和龟裂。成形性结晶料，熔融范围窄，熔融和凝固快，料温稍低于熔融温度即发生结晶，流动性中等，吸湿小，可不经干燥处理。
The fatigue strength of POM is very prominent. After 10 alternating loads, the fatigue strength can reach 35MPa, while PA and PC 28MPa are only 28MPa. The creep of POM is similar to that of PA. It is only 2.3% at 20 C, 21MPa and 3000h, and it is very little affected by temperature. The friction coefficient of POM is ***all and its wear resistance is good. The weatherability of POM is not good. Under long-term ultr***iolet action, the mechanical properties decrease and the surface is powdered and cracked. Forming crystallizing crystals, the melting range is narrow, melting and solidification are fast, the material temperature is slightly lower than the melting temperature, which occurs crystallization, the fluidity is medium, the moisture absorption is ***all, can not be treated by drying.

PC LGK5030（体积）耐老化PBT易于阻燃，可达UL94V-0级，由于与阻燃剂亲和性能好，所以容易开发反应型或添加型的阻燃品级。阻燃产品在电子电器工业中获得广泛应用。⒍PBT在高温、高湿环境下遇水易分解，使用需谨慎。⒎优良的电气性能，体积电阻率及介电强度高，耐电弧性优良，吸湿性***，在潮湿及高温环境下，也能保持电性能稳定，是制造电子、电器零件的理想材料。⒏易成型加工和二次加工，易用普通设备注塑或挤塑。由于结晶速度快，流动性好，模具温度也比其他工程材料要求低，在加工薄壁制件时仅需几秒钟，对大部件也只需40-60s即可。
PBT is easy to flame retardant, up to UL94V-0 grade. Because of its good affinity with flame retardant, it is easy to develop reactive or additive flame retardant grade.  Flame retardant products are widely used in the electronic and electrical industry. PBT is easy to decompose in water under high temperature and high humidity. It has excellent electrical properties, high volume resistivity and dielectric strength, high arc resistance, low moisture absorption, and stable electrical properties in wet and high temperature environment. It is an ideal material for manufacturing electronic and electrical parts. It is easy to shape and process two times, easy to use ordinary equipment for injection or extrusion. Because of the fast crystallization speed and good fluidity, the mold temperature is lower than the other engineering materials. It takes only a few seconds to process the thin-walled parts, and only 40-60s for the large parts.

ABS简称ABS。ABS通常为浅***或乳白色的粒料非结晶性树脂。ABS为使用***广泛的工程塑料之一。中文名ABS塑料外文名AcrylonitrileButadiene Styrene plastic化学名称***-丁二烯-***塑料适用范围机械、汽车、电子电器等产品特性抗冲击性、耐热性、耐低温性等CAS No.9003-56-9目录主要产地分子结构ABS树脂的结构，有以弹性体为主链的接枝共聚物和以坚硬的titleABS树脂物主链的接枝共聚物；或以橡胶弹性体和坚硬的ABS树脂混合物。
ABS is referred to as ABS. ABS is usually light yellow or milky white granular noncrystalline resin. ABS is one of the widely used engineering plastics used in ***. ABS plastic foreign name AcrylonitrileButadiene Styrene plastic chemical name acrylonitrile butadiene styrene plastic applicable range of mechanical, automotive, electronic appliances and other products, such as impact resistance, heat resistance, low temperature resistance and other CAS No.9003-56-9 catalogues of the main origin of molecular structure ABS resin structure, with the main elastic body Graft copolymers of chains and graft copolymers of backbone chains with rigid titleABS resins or mixtures of rubber elastomers and rigid ABS resins.