PA6 BKV30---PA6 processing technology and precauti***:
PA can be molded by injection molding, extrusion and blow molding.
Drying treatment: as PA6 is easy to absorb moisture, special attention should be paid to the drying before processing. If the material is supplied in waterproof material, the container should be kept closed. If the humidity is greater than 0.2%, it is recommended to dry in hot air above 80 ℃ for 16 hours. If the material has been exposed to air for more than 8 hours, vacuum drying at 105 ℃ for more than 8 hours is recommended.
Melting temperature: 230-280 ℃, 250-280 ℃ for reinforced products.
Mold temperature: 80-90 ℃, mold temperature significantly affects the crystallinity, which in turn affects the mechanical properties of plastic parts. Therefore, it is very important for the mold structure to be 80-90 ℃. For thin-walled and long process parts, higher mold temperature is also recommended. Increasing mold temperature can improve the strength and stiffness of plastic parts, but reduce the toughness. If the wall thickness is greater than 3 mm, it is recommended to use a low-temperature die with 20-40 ℃. For glass fiber reinforced materials, the mold temperature should be higher than 80 ℃.
Injection pressure: generally between 750-1250bar (depending on material and product design)
Injection speed: high speed (slightly lower for reinforcement materials)
Runner and gate: the setting time of PA6 is very short, so the location of gate is very important. The gate diameter should not be less than 0.5 * t (where t is the thickness of the plastic part). If a hot runner is used, the gate size should be ***aller than that of a conventional runner, as the hot runner can help prevent premature solidification of the material. If a submerged gate is used, the minimum diameter of the gate should be 0.75mm.
物理性能 干燥 调节后的 单位制 测试方法
比重
-- 1.36 1.36 -- g/cm³ ASTM D792
23°C 1.36 -- g/cm³ ISO 1183
表观密度 0.70 -- g/cm³ ISO 60
溶化体积流率（MVR） (260°C/5.0 kg) 14.0 -- cm³/10min ISO 1133
收缩率 ISO 2577
垂直流动方向 : 280°C, 3.00 mm 1 0.82 -- % ISO 2577
垂直流动方向 : 120°C, 4小时, 3.00 mm 2 0.12 -- % ISO 2577
流动方向 : 280°C, 3.00 mm 3 0.16 -- % ISO 2577
流动方向 : 120°C, 4小时, 3.00 mm 4 0.030 -- % ISO 2577
吸水率 ISO 62
饱和, 23°C 7.0 -- % ISO 62
平衡, 23°C, 50% RH 2.1 -- % ISO 62