描述
黑色PA12天然色聚酰胺12耳机挂钩供应商
PA12塑料材料
良好的抗冲击性机器化学稳定性
良好的耐磨性、自润滑性和耐溶剂性
免费样品和快递
黑色PA12天然色聚酰胺12耳机挂钩供应商
产品详细信息
黑色PA12天然色聚酰胺12耳机挂钩供应商
尼龙的工艺特性
1。尼龙的流变性能大多数尼龙是结晶性树脂。当温度超过其熔点时，其熔体粘度小，熔体流动性好。应防止其溢出。同时，由于熔体凝结速度快，有必要防止材料堵塞喷嘴、流道、浇口等，导致产品不足。结晶器溢流值为0.03，熔体粘度对温度和剪切力变化更敏感，但对温度更敏感。为了降低熔体粘度，从桶温开始
2。尼龙的吸水性和干燥性
尼龙具有高吸水性。在湿尼龙成型过程中，尼龙的粘度急剧下降，气泡产品表面出现银线。最终产品的机械强度降低，因此材料必须在加工前干燥
3。结晶度
除了透明尼龙，尼龙大多是结晶聚合物，结晶度高。产品的抗拉强度、耐磨性、硬度、润滑性等性能均有所提高。热膨胀系数和吸水率有下降趋势，但透明度和抗冲击性较差
结晶器温度对结晶有很大影响，高结晶器温度和高结晶度，低结晶器温度和低结晶度
Black PA12 Natural Color Polyamide12 Supplier For Headphone Hook
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PA12 Plastic Material
Good impact resistance machine chemical stability
Good wear resistance, self-lubricating and solvent resistance
Free Sample and express delivery
Black PA12 Natural Color Polyamide12 Supplier For Headphone Hook
Product Details
Black PA12 Natural Color Polyamide12 supplier for Headphone hook
Process characteristics of nylon
1. Rheological properties of nylon
Most nylons are crystalline resins. When the temperature exceeds its melting point, its melt viscosity is small, and the melt fluidity is excellent. It should be prevented from overflowing. At the same time, due to the fast condensation speed of the melt, it is necessary to prevent the materials from blocking the nozzles, runners, gates, etc. to cause insufficient products. The mold overflow value is 0.03, and the melt viscosity is more sensitive to temperature and shear force changes, but it is more sensitive to temperature. To reduce the melt viscosity, start with the barrel temperature.
2. Water absorption and drying of nylon
Nylon has high water absorption. During the molding process of wet nylon, the viscosity of the nylon drops sharply and silver thread appears on the surface of the bubble product. The mechanical strength of the resulting product decreases, so the material must be dried before processing.
3. Crystallinity
In addition to transparent nylon, nylons are mostly crystalline polymers, with high crystallinity. The tensile strength, wear resistance, hardness, lubricity and other properties of products have improved. The coefficient of thermal expansion and water absorption tend to decrease, but the transparency and Impact resistance is not good.
Mold temperature has a great influence on crystallization, high mold temperature and high crystallinity, low mold temperature and low crystallinity.
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