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
The next man Hagen brought in was a very simple case. Hisname was Anthony Coppola and he was the son of a man Don Corleonehad worked with in the railroad yards in his youth. Coppola neededfive hundred dollars to open a pizzeria; for a depositon fixtures167 and the special oven. For reasons not goneinto, credit was not available. The Don reached into his pocket andtook out a roll of bills. It was not quite enough. He grimaced andsaid to Tom Hagen, "Loan me a hundred dollars, I'll pay you backMonday when I go to the bank." The supplicant protested that fourhundred dollars would be ample, but Don Corleone patted hisshoulder, saying, apologetically, "This fancy wedding left me alittle short of cash." He took the money Hagen extended to him andgave it to Anthony Coppola with his own roll of bills.