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
‘I’ve been hearing that a lot recently,’ said Hideji, then took along drag on his cigarette.
‘You have? Wait – don’t tell me you’ve remarried?’
‘Actually, that’s what brings me here. See, I need your helprecreating a certain . . . flavour,’
said Hideji, smiling as he stubbed his cigarette out in theashtray.
‘Thanks for the katsudon – it was delicious,’ said Hiroshi,slapping a five-hundred-yen coin on
the counter and walking out of the restaurant with hiscigarette dangling49 fromhis mouth. Hideji,
following him with his gaze, turned to Koishi.