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
Johnny Fontane reached down and lifted the bride up ontothe bandstand so that Connie stood between him and Nino. Bothmen crouched232 down, facing each other, Nino pluckingthe mandolin for a few harsh chords. It was an old routine oftheirs, a mock battle and wooing, using their voices like swords,each shouting a chorus in turn. With the most delicate courtesy,Johnny let Nino's voice overwhelm his own, let Nino take the bridefrom his arm, let Nino swing into thelast victorious233 stanza while his own voice died away.The whole wedding party broke into shouts of applause, the three ofthem embraced each other at the end. The guests begged for anothersong.