聚酰胺俗称尼龙(Nylon)，英文名称Polyamide ，它是大分子主链重复单元中含有酰胺基团的高聚物的总称。聚酰胺可由内酸胺开环聚合制得，也可由二元胺与二元酸缩聚等得到的。聚酰胺(PA)是指主链节含有极性酰胺基团(-CO-NH一)的高聚物。最初用作制造纤维的原料，后来由于PA具有强韧、耐磨、自润滑、使用温度范围宽成为目前工业中应用广泛的一种工程塑料。PA广泛用来代替铜、有色金属制作机械、化工、电器零件，如柴油发动机燃油泵齿轮、水泵、高压密封圈、输油管等。 [1] 是美国DuPont公司最先开发用于纤维的树脂，于1939年实现工业化。20世纪50年代开始开发和生产注塑制品，以取代金属满足下游工业制品轻量化、降低成本的要求。PA具有良好的综合性能，包括力学性能、耐热性、耐磨损性、耐化学药品性和自润滑性，且摩擦系数低，有一定的阻燃性，易于加工，适于用玻璃纤维和其它填料填充增强改性，提高性能和扩大应用范围。PA的品种繁多，有PA6、PA66、PA11、PA12、PA46、PA610、PA612、PAl010等，以及近几年开发的半芳香族尼龙PA6T和特种尼龙等新品种。
尼龙主要特点如下：
1．优良的力学性能。尼龙的机械强度高，韧性好。
2．自润性、耐摩擦性好。尼龙具有很好的自润性，摩擦系数小，从而，作为传动部件其使用寿命长。
3.优良的耐热性。如尼龙46等高结晶性尼龙的热变形温度很高，可在150℃下长期期使用。PA66经过
玻璃纤维增强以后，其热变形温度达到250℃以上。
4.优异的电绝缘性能。尼龙的体积电阻很高，耐击穿电压高，是优良的电气、电器绝缘材料。
5.优良的耐气候性。
6.吸水性。尼龙吸水性大，饱和水可达到3%以上。在一定程度影响制件的尺寸稳定性。
尼龙主要应用如下：
伴随石油化学工业和其他工业的发展，为尼龙工程塑料的发展，提供了丰富、价廉的原料和广阔的市场。
尼龙主要用于汽车工业、电气电子工业、交通运输业、机械制造工业、电线电缆通讯业、薄膜及日常用品。
用于汽车工业的尼龙约占尼龙总消费量的1/3。主要是利用尼龙树腊密度小和优是的综合性能，以适应汽
车轻量节能的要求。特别是利用它的机械强度较好、耐磨、耐油、自润滑等特点，制造各种轴承、齿轮、
滑轮、输油管、储油器、耐油垫片，保护罩、支撑架、车轮罩盖、导流板、风扇、空气过滤器外壳、散热
器水室、制动管、发动机罩、车门把手等。
我公司长期经营杜邦Zytel系列PA66，可提供SGS、ROHS、UL黄卡、MSDS、FDA、COA、PDF物性表等各项数据，欢迎来电洽谈！
杜邦ZYTEL同系列型号介绍如下：
Zytel 151 NC010 A PA 612 resin
Zytel 151L NC010 Lubricated, general purpose molding grade
Zytel 153HSL NC010 Lubricated, heat stabilized, extrusion grade
Zytel 157HSL BK010 Lubricated, heat stabilized, improved weather resistant molding/extrusion grade
Zytel 158 NC010 General purpose PA 612 resin suitable for molding and extrusion applications
Zytel 158L NC010 Lubricated, general purpose molding/extrusion grade -- a higher melt viscosity than Zytel 151L NC010
Zytel 159 NC010 High viscosity, extrusion grade
Zytel 77G33HS1L NC010 33% Glass fiber reinforced, heat stabilized polyamide 612 resin for injection molding
Zytel 77G33L BK031 33% Glass fiber reinforced, black polyamide 612 resin for injection molding
Zytel 77G33L NC010 33% Glass fiber reinforced, polyamide 612 resin for injection molding
Zytel 77G43L BK031 43% Glass fiber reinforced, black polyamide 612 resin for injection molding
Zytel 77G43L NC010 43% Glass fiber reinforced polyamide 612 resin for injection molding
Zytel MT409AHS BK010 Medium Toughened, high performance, heat stabilized, black polyamide 66 resin having good stiffness and improved knit line strength with superior toughness and processability
Zytel MT409AHS NC010 Medium Toughened, high performance, heat stabilized polyamide 66 resin having good stiffness, improved knit line strength, surface appearance with outstanding processability
Zytel ST800HSL BK152 Heat stablized Super Tough black polyamide 66 resin. It offers outstanding impact resistance, high productivity and laser markability
Zytel ST801A NC010A Super Tough, high performance, polyamide 66 resin. It is partially UV stabilized and when appropriately colored offers limited protection to indirect sunlight exposure.
Zytel ST801AHS BK010 Super Tough, high performance, black polyamide 66 resin. It offers outstanding molding performance in injection molding applications.
Zytel ST801AHS NC010 Super Tough, high performance polyamide 66 resin. It offers outstanding molding performance in injection molding applications.
Zytel ST801AW BK195 Super Tough, weatherable, easy flow and processing friendly, black polyamide 66 resin for injection molding. It offers the best resistance to outdoor exposure.
Zytel ST801AW NC010 Super Tough, high performance polyamide 66 resin. It is UV stabilized and when appropriately colored, offers the best resistance to indirect sunlight in automotive interior applications.
Zytel ST811HS NC010 Rubber modified nylon 6 resin. Very flexible.
Zytel 8018HS BKB085 14% Glass reinforced toughened heat stabilized black nylon 66 resin
Zytel 8018HS NC010 14% Glass reinforced toughened heat stabilized nylon 66 resin
Zytel 80G14A NC010A 14% Glass fiber reinforced, toughened, high flow polyamide 66 resin. It offers outstanding performance ininjection molding applications.
Zytel 80G14AHS BK099 14% Glass fiber reinforced, toughened, high flow, heat stabilized, black polyamide 66 resin. It offers outstanding performance in injection molding applications.
Zytel 80G14AHS NC010 14% Glass fiber reinforced, toughened, high flow, heat stabilized polyamide 66 resin. It offers outstanding performance in injection molding applications.
Zytel 80G25HS BK117 25% Glass fiber reinforced, toughened, heat stabilized, black polyamide 66 resin for injection molding
Zytel 80G33HS1L BK104 33% Glass fiber reinforced, heat stabilized black polyamide 66 resin with outstanding impact resistance developed using DuPont Super Tough technology
Zytel 80G33HS1L NC010 33% Glass fiber reinforced heat stabilized polyamide 66 resin with outstanding impact resistance developedusing DuPont Super Tough technology
Zytel 80G33L NC010 33% Glass fiber reinforced polyamide 66 resin with outstanding impact resistance developed using DuPont SuperTough technology
Zytel 80G43HS1L BK104 43% Glass fiber reinforced, heat stabilized, black polyamide 66 resin with superior impact resistance
Zytel 84G33 BKB031 33% Glass reinforced toughened black cube blended nylon 66 and nylon 6 comelt resin
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