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
"You acted like the worst kind of degenerates," the judge saidharshly. Yes, yes, thought Amerigo Bonasera. Animals. Animals. Thetwo young men, glossy7 hair crew cut, scrubbed clean-cutfaces composed into humble8 contrition9, bowed theirheads in submission10.
The judge went on. "You acted like wild beasts in a jungleand you are fortunate you did not sexually molest11 thatpoor girl or I'd put you behind bars for twenty years." The judgepaused, his eyes beneath impressively thickbrows flickered13 slyly toward the sallow-faced AmerigoBonasera, then lowered to a stack of probation14 reportsbefore him. He frowned and shrugged15 as if convincedagainst his own natural desire. He spoke16 again.