成型特性
1.结晶料,吸湿性小,易发生融体破裂,长期与热金属接触易分解.
2.流动性好,但收缩范围及收缩值大,易发生缩孔.凹痕,变形.
3.冷却速度快,浇注系统及冷却系统应缓慢散热,并注意控制成型温度.料温低温高压时容易取向,模具温度低于50度时,塑件不光滑,易产生熔接不良,流痕,90度以上易发生翘曲变形
4.塑料壁厚须均匀,避免缺胶,尖角,以防应力集中.
专业供应加纤PP、防火PP、抗静电PP、抗紫外线PP、抗冲击PP、食品级PP、耐热级PP、耐候级PP、高流动PP、以及吹塑级PP、挤出级PP、透明级PP等。
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详细说明：This time the old man didn’t deign to answer me, but, turning his back contemptuously, started talking about the murder to another customer who had just come in.
I asked Lucy for another lemon-squash and in taking it from her took care that our fingers should meet. She looked up as I expected she would, and just gave me a little quick glance of enquiry — quick and fleeting only, but sufficient to rouse in me the delicious hope that there might be now the beginnings of some sweet and subtle bonds of sympathy between us.“I go to chapel,” he said heavily, “for the same reason as I don’t go to pubs — for the sake of example.”
