PA料和PP料ABS、PBT、PE以上料的性质是什么?请帮忙,谢谢!
推荐回答(2个)
是材料不一样啊
PP塑料,化学名称:聚丙烯
英文名称:Polypropylene(简称PP)
比重:0.9-0.91克/立方厘米 成型收缩率:1.0-2.5% 成型温度:160-220℃
特点: 密度小,强度刚度,硬度耐热性均优于低压聚乙烯,可在100度左右使用.具有良好的电性能和高频绝缘性不受湿度影响,但低温时变脆、不耐磨、易老化. 适于制作一般机械零件,耐腐蚀零件和绝缘零件
成型特性:
1.结晶料,吸湿性小,易发生融体破裂,长期与热金属接触易分解.
2.流动性好,但收缩范围及收缩值大,易发生缩孔.凹痕,变形.
3.冷却速度快,浇注系统及冷却系统应缓慢散热,并注意控制成型温度.料温低温高压时容易取向,模具温度低于50度时,塑件不光滑,易产生熔接不良,流痕,90度以上易发生翘曲变形
4.塑料壁厚须均匀,避免缺胶,尖角,以防应力集中.
丙烯--丁二烯--苯二烯(ABS)共聚物
性 质
丙烯腈提供耐热及抗化性,丁二烯提供韧性及耐冲击性,苯乙烯提供挺性及加工性
优 点
1、坚硬,易押出
2、易染色
3、难燃
4、耐冲击
5、表面性佳
缺 点
1、耐溶剂性差
2、低介电强度
3、低拉伸率
用 途
把手、外壳、行李箱、冰箱衬垫、家电制品
聚丙烯(PP)
性 质
极轻之塑料,密度仅为0.9g/cm3
加工性质毋须预热干燥
优 点
1、易染色
2、耐湿性佳
3、耐化性佳
4、高铰链特性
5、耐冲击性
缺 点
1、复杂之异形押出不易
2、易被紫外线分解
3、不易接合
4、易氧化
用 途
水管、胶膜、胶布、电线蔽护材料、容器、汽车保险杆、仪表板、铰链
聚酰胺(PA、尼龙Nylon)
结构式 [NH(CH2)m NHCO(CH2)n-2CO]
性质 结晶性热可塑性塑料,有明显熔点,Nylon6 Tm为220~230℃,Nylon66则为260~270℃,Nylon本身 具吸水基故有吸水性,成形前须干燥,温度过高干燥则尼龙粒变色
优点 1、具高抗张强度
2、耐韧、耐冲击性特优
3、自润性、耐磨性佳、耐药品性优
4、低温特性佳
5、具自熄性
缺点 尼龙吸湿性高、长期尺寸精密度及物性受影响。
用途 电子电器:连接器、卷线轴、计时器、护盖断路器、开关壳座
汽 车: 散热风扇、门把、油箱盖、进气隔栅、水箱护盖、灯座
工业零件:椅座、自行车输框、溜冰鞋底座、纺织梭、踏板、滑输
饱和聚酯对苯二甲酸丁酯 ( PBT )
性质 为高结晶性热可塑性塑料,熔点220~230℃,结晶速率比PET快。
优点 1、机械性质安定抗张强度与抗张模数和尼龙相似
2、摩擦系数小有自润性
3、吸水率低
4、电气性质优良
5、尺寸安定性良好
6、耐药品性、耐油性极佳
缺点 1、Tg(30℃)低,在荷重下H.D.T.为60℃
2、抗冲击强度不良,一般以玻纤补强为FR-PBT来使用
用途 电子电器:无熔线断电器、电磁开关、驰返变压器、家电把手、连接器、外壳
汽 车: 车门把手、保险杆、分电盘盖、挡泥板、导线护壳、轮圈盖
工业零件:OA风扇、键盘、钓具卷线器、零件、灯罩
聚乙烯(PE)
性 质
LDPE容度为0.910~0.925g/cm3
MDPE容度为0.926~0.940g/cm3
HDPE容度为0.941~0.965g/cm3
优 点
1、柔软、无毒
2、易染色
3、耐冲击(-40°C~90°C)
4、耐湿性
5、耐化性
缺 点
1、不易押出
2、热膨胀系数高
3、不易贴合
4、耐温性差
用 途
家庭用品、绝缘体、胶管、胶布、胶膜、容器
可以发邮件给我。
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