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 on this great day, his daughter's wedding day, DonVito Corleone stood in the doorway80 of his Long Beachhome to greet his guests, all of them known, all of them trusted.Many of them owed their good fortune in life to the Don and on thisintimate occasion felt free to call him "Godfather" to his face.Even the people performing festal services were his friends. Thebartender was an old comrade whose gift was all the wedding liquorsand his own expert skills. The waiters were the friends of DonCorleone's sons. The food on the garden picnic tables had beencooked by the Don's wife and her friends andthe gaily81 festooned one-acre garden itself had beendecorated by the young girl-chums of the bride.