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
Koishi was sitting on a sofa opposite Hideji, on the other side ofa low table.
‘Name, age, date of birth, address, occupation . . . Sheesh, feelslike I’m taking out an insurance
policy!’ chuckled53 Hideji,opening up the folding clipboard Koishi handed him.
‘I wouldn’t worry too much about the details, seeing as it’syou.’
‘Oh, but I’m a former bureaucrat54.You won’t catch me cutting corners!’ said Hideji,returning
the clipboard.