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
go blind. When his father died, Tom Hagen's eleven-year-old mindhad snapped in a curious way. He had roamed the streets like ananimal waiting for death until the fateful day Sonny found himsleeping in the back of a hallway and brought him to his home. Whathad happened afterward was a miracle. But for years Hagen had hadnightmares, dreaming he had grown to manhood blind, tapping awhite cane325, his blind children behind him tap-tapping withtheir little white canes326 as they begged in thestreets. Some mornings when he woke the face of Don Corleone wasimprinted on his brain in that first conscious moment and he wouldfeel safe.