聚甲醛塑料,俗称赛钢,为结晶性热可塑性塑料,具明显熔点165~175℃,性质Zui接近金属。
优点 1、具高机械强度和刚性
2、Zui高的疲劳强度
3、环境抵抗性、耐有机溶剂性佳
4、耐反覆冲击性强
5、广泛的使用温度范围(-40℃~120℃)
6、良好的电气性质
7、复原性良好
8、具自已润滑性、耐磨性良好
9、尺寸安定性优
缺点 1、加工过程若长时间高温下易起热分解
2、无自熄性
3、抗酸性差
4、成形收缩率大
用途 电子电器:洗衣机、果汁机零件、定时器组件
汽 车: 车把零件、电动窗零件
工业零件:机械零件、齿轮、把手、玩具、螺杆
It was late Sunday night before Tom Hagen could kiss his wifegood-bye and drive out to the airport. With his special number onepriority (a grateful gift from a Pentagon staff general officer) hehad no trouble getting on a plane to Los Angeles.
It had been a busy but satisfying day for Tom Hagen. GencoAbbandando had died at three in the morning and when Don Corleonereturned from the hospital, he had informed Hagen that he was nowofficially the new Consigliere to the family. This meant that Hagenwas sure to become a very rich man, to say nothing of power.