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
This place has Nagare written all over it,’ muttered Hideji,casting his mind back to the days
he’d spent with Nagare Kamogawa, his former colleague. The two ofthem had both moved on to
other things now. Despite being Hideji’s junior, Nagare had beenthe first to quit the police.
He looked up at the restaurant, then opened thesliding aluminium10 door.
‘Welcome to – oh! If it isn’t Hideji!’ Koishi Kamogawa, a roundtray in her hands, froze with
surprise. Koishi was Nagare’s only daughter, and Hideji had knownher since she was a baby.
‘Koishi! Well, aren’t you all grown up,’ said Hideji, removing hiscoat.