有机玻璃板的一些优异性能

Published:

2020-11-30

 

 

PMMA塑料(有机玻璃)又叫(聚甲基丙烯酸甲脂)，聚苯乙烯,但质脆,易熔于有机溶剂,如作透光材料,其表面硬度稍低,容易擦花。适于制作透明绝缘零件和强度一般的零件。

成型性能

1.无定形料,吸湿大,需干燥,不易分解,流动性中等,易发生填充不良,粘模,收缩,熔接痕等；

2.宜高压注射,在不出现缺陷的条件下取高料温,高模温,以增加流动性,降低内应力,改善透明性及强度.模具浇注系统表面应光洁,脱模斜度大,顶出均匀.同时设排气口,以防出现起泡。

有机玻璃具有以上优良性能，使它的用途极为广泛。除了在飞机上用作座舱盖、风挡和弦窗外，也用作吉普车的风挡和车窗、大型建筑的天窗（可以防破碎）、电视和雷达的屏幕、仪器和设备的防护罩、电讯仪表的外壳、望远镜和照相机上的光学镜片。

用有机玻璃制造的日用品琳琅满目，如用珠光有机玻璃制成的纽扣，各种玩具、灯具也都因为有了彩色有机玻璃的装饰作用，而显得格外的美观。

有机玻璃在医学上还有一个绝妙的用处，那就是制造人工角膜。如果人眼的透明角膜长满了不透明的物质，光线就不能进入眼内。这就是全角膜白斑病引起的失明，而且这种病无法用药物治疗。

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