Phosphorus free PA66 Shanghai Rodia A 50H1 halogen-free connector

Description :

　　Phosphorus free PA66 Shanghai Rodia A 50H1 halogen-free connector

　　PA6 French Rhodia C 216 V30

　　PA6 Shanghai Rodia C 216 V30

　　PA66 Shanghai Rhodia A 50H1

　　PA66 Germany BASF A3XZG5

　　barrel temperature

　　(1) As nylon is a crystalline polymer, its melting point is obvious. The temperature of the barrel selected for injection molding of nylon resins is related to the properties of the resin itself, equipment, and the shape of the product.

　　(2) Excessive material temperature can cause color change, brittleness, and silver threads in the rubber parts, while excessively low material temperature can make the material hard and potentially damage the mold and screws.

　　(3) The melt temperature of nylon 6 is generally 210 ℃, while that of nylon 66 is 260 ℃. Due to the poor thermal stability of nylon, it is not suitable to stay in the barrel at high temperatures for a long time to avoid discoloration and yellowing of the material. At the same time, due to the good fluidity of nylon, it flows rapidly when the temperature exceeds its melting point.

　　Injection pressure

　　Nylon solution has low viscosity and good fluidity, but its condensation speed is fast. It is prone to deficiency problems in products with complex shapes and thin wall thicknesses, so higher injection pressure is still required, especially when glass fiber is added.

　　Usually, if the pressure is too high, the product may experience edge overflow issues; If the pressure is too low, the product may produce defects such as ripples, bubbles, obvious fusion marks, or insufficient products. The injection pressure of most nylon varieties does not exceed 120MPA, and is generally selected within the range of 60-100MPA to meet the requirements of most products. As long as the product does not have defects such as bubbles and dents, it is generally not desirable to use a higher holding pressure to avoid increasing internal stress in the product.

　　Injection speed

　　For nylon, it is beneficial to have a fast injection speed to prevent ripples and insufficient filling caused by slow cooling. The fast injection speed does not have a significant impact on the performance of the product.

　　mold temperature

　　(1) Mold temperature has a certain impact on crystallinity and molding shrinkage. High mold temperature results in higher crystallinity, wear resistance, hardness, increased elastic modulus, decreased water absorption, and increased molding shrinkage of the product, making it suitable for thick products; Low mold temperature has low crystallinity, good toughness, high elongation, and decreased shrinkage, making it suitable for thin products with good transparency.

　　(2) If the wall thickness is greater than 3mm, it is recommended to use a low-temperature mold of 20-40C. For glass reinforced material molds, the temperature should be greater than 80C.

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