描述

Pps树脂注射

所有先进工程塑料最广泛的耐化学品性

改进了Pps的尺寸稳定性和热性能

将强度保持在425ºF以上

对蒸汽、强碱、燃料和水不敏感，酸

最小吸水率

优良的电绝缘体

极低的线性热膨胀系数

聚苯硫醚树脂注射剂

产品详细信息

，注射压力的增加对成型的负面影响较小。注入压力通常为80-150Mpa
注射速度：注射速度越快，产品表面光泽越好，但容易产生产品翘曲、边缘溢出和烧焦。因此，通常使用中等注射速度
保压压力：为了防止内应力的产生，保压压力应尽可能低，产品应无气泡、凹痕、缺料等缺陷作为判断标准<为了获得稳定的背压，通常要求背压大于0.8 MPa，以获得一定质量的产品
螺杆转速：PPS注射成型的螺杆转速一般为40-110rPM，虽然可以使用220rPM或更高的转速进行高循环成型，但树脂容易因剪切而产生热量，因此必须同时降低料筒温度。此外，高剪切速率会增加填充纤维的断裂，这对产品的性能不利
成型周期：在厚壁成型中，为了提高结晶度并获得良好的机械性能，有必要适当延长冷却时间；薄壁成型周期通常为20-30秒
产品脱模：由于PPS本身具有脱模性能，因此通常不使用脱模剂，或者脱模剂用量较小。如果使用，可以选择硬脂酸锌、氟基和硅基脱模剂
成型后清洁：使用熔融指数较低（约0.2-0.5）的聚乙烯进行清洁更经济

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Pps Resin Injection

Broadest resistance to chemicals of all advanced engineering plastics
Improved dimensional stability and thermal performance over PPS
Maintains strength above 425º F
Inert to steam, strong bases, fuels, and acids
Minimal water absorption
Excellent electrical insulator
Very low coefficient of linear thermal expansion

Pps Resin Injection

Product Details

pps resin injection

Injection pressure: High injection pressure is better for PPS products, especially complex and thin-walled parts, and the increase in injection pressure has less negative impact on molding. The injection pressure is usually 80-150Mpa.
Injection speed: The faster the injection speed, the better the surface gloss of the product, but it is prone to product warping, edge overflow and scorching. Therefore, a medium injection speed is generally used.
Holding pressure: In order to prevent the generation of internal stress, the holding pressure should be as low as possible, and the product should be free of bubbles, dents, lack of material and other defects as the judgment standard.
Back pressure: In order to obtain products with stable quality, a certain back pressure is required, usually 0.3-0.8 MPa.
Screw speed: The screw speed of PPS injection molding is generally 40-110rPM, and although 220rPM or more can be used for high-cycle molding, the resin is easy to generate heat due to shearing, so the barrel temperature must be reduced at the same time. In addition, the high shear rate will increase the breakage of the filled fiber, which is detrimental to the performance of the product.
Molding cycle: In thick-wall molding, in order to improve crystallinity and obtain good mechanical properties, it is necessary to appropriately extend the cooling time; the thin-wall molding cycle is usually 20-30 seconds.
Product release: Because PPS itself has mold release properties, mold release agents are usually not used or small. If used, zinc stearate, fluorine-based and silicone-based mold release agents can be selected.
Cleaning after molding: It is more economical to use polyethylene with a low melt index (about 0.2-0.5) for cleaning.

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