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
Tarantella. Clemenza, immensely tall, immensely huge, dancedwith such skill and abandon, hishard belly134 lecherously135 bumping the breasts ofyounger, tinier women, that all the guests were applauding him.Older women grabbed his arm to become his next partner. The youngermen respectfully cleared off the floor and clapped their hands intime to the mandolin's wild strumming. When Clemenzafinally collapsed136 in a chair, Paulie Gatto brought hima glass of icy black wine and wipedthe perspiring137 Jovelike brow with his silkhandkerchief. Clemenza was blowing like a whale ashe gulped138 down the wine. But instead of thankingPaulie he said curtly139, "Never mind being a dance judge, doyour job. Take a walk around the neighborhood and see everything isOK." Paulie slid away into the crowd.