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：I knew I should have to wait until lunch time for any news I might hear. Waller always went out first, and at twelve to the second, he put on his coat.
He always chose the early hour, because then he used to meet a bookmaker at the bar of some public-house and consistently back horses that never seemed to win. The other clerks went out later, but my regular time was one o’clock, and I had no excuse for altering it.
Just before one I heard Waller talking loudly in the passage just outside our door. It sounded as if he had some exciting news.
