PA66模具温度：建议80℃。模具温度将影响结晶度，而结晶度将影响产品的物理特性。对于薄壁塑件，如果使用低于40℃的模具温度，则塑件的结晶度将随着时间而变化，为了保持塑件的几何稳定性，需要进行退火处理。

短纤维可与棉、毛和粘胶纤维混纺，使织物具有良好的耐磨性和强度。还可用作尼龙搭扣、地毯、装饰布等。工业上主要用于制造帘子布、传送带、渔网、缆绳等。

2 化学改性

化学改性是通过化学反应在PA66分子的主链或侧链引入新的结构单元、聚合物链或功能基团，从而使其结构、性能都发生变化。

前者大特点是高强度（钢丝的5～6倍)、高模量(钢丝的2～3倍)、低比重（钢丝的1/5），它耐高温、抗化学腐蚀，但耐紫外线较差。1950年法国开发了聚酰胺11。1958年试制成功聚酰胺1010，苏联试制成功共聚酰胺。

规 格牌 号特 点

     pa66德国巴斯夫 a3k q601绝缘，流动性好

     pa66德国巴斯夫 a3k q603一般目的

     pa66德国巴斯夫 a3l hp抗冲击，热稳定

     pa66德国巴斯夫 a3w抗热老化，流动性好，耐油

     pa66德国巴斯夫 a3z抗冲击，耐油

Melting temperature of PA66: 260~290 ℃. The product temperature for glass additives is 275~280 ℃. The melting temperature should be avoided above 300 ℃.

PA66 mold temperature: 80 ℃ recommended. The mold temperature will affect the crystallinity, which will affect the physical properties of the product. For thin-walled plastic parts, if a mold temperature below 40 ℃ is used, the crystallinity of the parts will change over time. In order to maintain the geometric stability of the parts, annealing treatment is required.

Short fibers can be blended with cotton, wool, and viscose fibers to give the fabric good wear resistance and strength. It can also be used as nylon buckles, carpets, decorative fabrics, etc. In industry, it is mainly used for manufacturing curtain fabrics, conveyor belts, fishing nets, cables, etc.

2 Chemical modification

Chemical modification is the introduction of new structural units, polymer chains, or functional groups into the main or side chains of PA66 molecules through chemical reactions, resulting in changes in their structure and properties.

The former is characterized by high strength (5-6 times that of steel wire), high modulus (2-3 times that of steel wire), and low specific gravity (1/5 of steel wire). It is resistant to high temperature and chemical corrosion, but has poor UV resistance. In 1950, France developed polyamide 11. In 1958, polyamide 1010 was successfully trial-produced, and the Soviet Union successfully trial-produced copolyamide.

Specification and brand characteristics

PA66 BASF Germany a3k q601 insulation, good fluidity

PA66 BASF Germany a3k q603 General Purpose

PA66 BASF A3l HP impact resistant, thermally stable

PA66 BASF A3W from Germany has heat aging resistance, good flowability, and oil resistance

PA66 BASF Germany a3z impact resistant, oil resistant