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
Now this youngest son sat at a table in the extreme cornerof the garden to proclaim his chosen alienation100 fromfather and family. Beside him sat the American girl everyone hadheard about but whom no one had seen until this day. He had, ofcourse, shown the proper respect and introduced her to everyone atthe wedding, including his family. They were not impressed withher. She was too thin, she was too fair, her face was too sharplyintelligent for a woman, her manner too free for a maiden. Hername, too, was outlandish to their ears; she called herself KayAdams. If she had told them that her family had settled in Americatwo hundred years ago and her name was a common one, they wouldhave shrugged.