CN106497059A - 一种聚苯硫醚双拉膜及其制备方法 - Google Patents
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Abstract
本发明公开了一种聚苯硫醚双拉膜及其制备方法。由如下重量份数的原料制成:聚苯硫醚树脂60‑90份,硫化钠1‑2份,三氧化二铬1‑2份,成核剂1‑2份,导热剂3‑4份,抗氧剂1‑2份,增韧剂1‑2份。采用本发明的方法制备的聚苯硫醚双拉膜具有优异的耐热性、热尺寸稳定性、热成型性及韧性,可应用于航空器,船舶制造,车辆,机械制造等领域。本发明的聚苯硫醚双拉膜制造过程中,熔融温度低,降低了制造设备的要求,节约了能源。
Description
技术领域
本发明涉及一种聚苯硫醚薄膜的制备方法,特别涉及一种聚苯硫醚双拉膜及其制备方法。
背景技术
聚苯硫醚英文简写为PPS,是一种新型高性能热塑性树脂,具有机械强度高、耐高温、耐化学药品性、难燃、热稳定性好、电性能优良等优点。在电子、汽车、机械及化工领域均有广泛应用。聚苯硫醚是一种结晶性的聚合物。未经拉伸的纤维具有较大的无定形区(结晶度约为5%),在125℃时发生结晶放热,玻璃化温度为150℃;熔点281℃。拉伸纤维在拉伸过程中产生了部分结晶,(增加至30%),如在130-230℃温度下对拉伸纤维进行热处理,可使结晶度增加到60-80%。因此,拉伸后的纤维没有明显的玻璃化转变或结晶放热现象,其熔点为284℃。随着拉伸热定形后结晶度的提高,纤维的密度也相应增大,由拉伸前的1.33g/cm3到拉伸后的1.34g/cm3,经热处理后则可达1.38g/cm3。成型收缩率:0.7%成型温度:300-330℃。
自聚苯硫醚实现产业化以来,已经开发了PPS涂料、PPS工程塑料、PPS纤维及其集尘滤袋等众多的品种,并在相关领域得到了广泛应用,取得了良好的经济效益、社会效益和环境效益。PPS薄膜可分为流涎膜和双拉膜,其用途是有差别的,流涎膜主要用于制造先进复合材料,现有用户为航空器、船舶制造部门,价格便宜后可以用于车辆、机械制造领域;双拉膜主要用于电工绝缘、薄膜电容器行业。由于PPS材料的高熔点性,采用流涎的方法要大幅提高设备的温度,不仅浪费能源,且过程控制比较困难,急需开发一种可降低流涎温度的聚苯硫醚薄膜。
发明内容
本发明的目的在于提供一种聚苯硫醚双拉膜及其制备方法。
一种聚苯硫醚双拉膜,由如下重量份数的原料制成:聚苯硫醚树脂60-90份,硫化钠1-2份,三氧化二铬1-2份,成核剂1-2份,导热剂3-4份,抗氧剂1-2份,增韧剂1-2份。
所述成核剂为二-[4-叔丁基苯甲酸]羟基铝,苯基膦酸钠,多元醇二缩醛-氧化铝接枝物,乙烯-丙烯酸共聚物,乙烯-丙烯酸离聚物,对叔丁基苯甲酸羟基铝,苯甲酸钠,苯甲酸铝中的一种或一种以上。
所述导热剂为甲基苯并三氮唑,三乙醇胺,三聚磷酸钠,氮化硼,聚醚,硅藻土,氨化铍中的一种或一种以上。
所述抗氧剂为聚磷酸盐,二丁基二硫代氨基甲酸锌,氨基吡唑,三聚氰酸,亚硝酸钙中的一种或一种以上。
所述增韧剂为聚丙烯纤维,季戊四醇硬脂酸酯,甲基丙烯酸甲酯一丁二烯一苯乙烯共聚物,醋酸乙烯,二乙基羟胺中的一种或一种以上。
上述聚苯硫醚双拉膜的制备方法,按照如下步骤进行:
(1)将上述原料混合,经双螺杆挤出机熔融共混挤出,向表面温度为40-50℃的物料施加静电荷冷辊输送的同时进行密合冷却固化,得到未拉伸的聚苯硫醚双拉膜片;
其中,喂料速度30-60r/min,螺杆速度200-300r/min,计量泵转速30-60r/min,熔融塑化温度为200-230℃,模头温度为200-250℃;
(2)将步骤(1)得到的未拉伸的聚苯硫醚双拉膜片进行双轴拉伸,拉伸方法采用先在长度方向上纵向拉伸,再在宽度方向上进行横向拉伸的依次双轴拉伸法,所述纵向拉伸:将双拉膜片送入纵向拉伸辊,在膜的纵向方向上进行拉伸,拉伸倍率为2.5-4.5倍,拉伸温度为92-122℃,然后用20-50℃的冷却辊组冷却;所述横向拉伸:将经过纵向拉伸的厚片送入横向拉伸机进行横向拉伸,预热温度90℃-110℃,预热时间18-25s;拉伸温度为100℃-130℃,拉伸倍率3.0-5.0倍;随后对该拉伸膜在宽度方向上进行松弛的同时进行热定型,热定型温度150℃-170℃,时间10-20s,松弛率2-7%,最后冷却至室温,即得聚苯硫醚双拉膜。
与现有技术相比,本发明具有如下有益效果:采用本发明的方法制备的聚苯硫醚双拉膜具有优异的耐热性、热尺寸稳定性、热成型性及韧性,可应用于航空器,船舶制造,车辆,机械制造等领域。本发明的聚苯硫醚双拉膜制造过程中,熔融温度低,降低了制造设备的要求,节约了能源。
具体实施方式
下面对本发明的具体实施方式进行详细描述,但应当理解本发明的保护范围并不受具体实施方式的限制。
实施例1
一种聚苯硫醚双拉膜,由如下重量份数的原料制成:聚苯硫醚树脂70份,硫化钠1.5份,三氧化二铬1.5份,二-[4-叔丁基苯甲酸]羟基铝1.5份,甲基苯并三氮唑3.5份,聚磷酸盐1.5份,聚丙烯纤维1.5份。
上述聚苯硫醚双拉膜的制备方法,按照如下步骤进行:
(1)将上述原料混合,经双螺杆挤出机熔融共混挤出,向表面温度为45℃的物料施加静电荷冷辊输送的同时进行密合冷却固化,得到未拉伸的聚苯硫醚双拉膜片;
其中,喂料速度50r/min,螺杆速度250r/min,计量泵转速40r/min,熔融塑化温度为210℃,模头温度为230℃;
(2)将步骤(1)得到的未拉伸的聚苯硫醚双拉膜片进行双轴拉伸,拉伸方法采用先在长度方向上纵向拉伸,再在宽度方向上进行横向拉伸的依次双轴拉伸法,所述纵向拉伸:将双拉膜片送入纵向拉伸辊,在膜的纵向方向上进行拉伸,拉伸倍率为3倍,拉伸温度为101℃,然后用30℃的冷却辊组冷却;所述横向拉伸:将经过纵向拉伸的厚片送入横向拉伸机进行横向拉伸,预热温度100℃,预热时间20s;拉伸温度为111℃,拉伸倍率4.0倍;随后对该拉伸膜在宽度方向上进行松弛的同时进行热定型,热定型温度160℃,时间15s,松弛率4%,最后冷却至室温,即得聚苯硫醚双拉膜。
本实施例制备的聚苯硫醚双拉膜,250℃条件下的热收缩率为0.6%,表面粗糙度0.18um,绝缘破坏强度235kv/mm。
实施例2
一种聚苯硫醚双拉膜,由如下重量份数的原料制成:聚苯硫醚树脂60份,硫化钠1份,三氧化二铬1份,多元醇二缩醛-氧化铝接枝物1份,三聚磷酸钠2份,氮化硼1份,二丁基二硫代氨基甲酸锌1份,季戊四醇硬脂酸酯1份。
上述聚苯硫醚双拉膜的制备方法,按照如下步骤进行:
(1)将上述原料混合,经双螺杆挤出机熔融共混挤出,向表面温度为40℃的物料施加静电荷冷辊输送的同时进行密合冷却固化,得到未拉伸的聚苯硫醚双拉膜片;
其中,喂料速度30r/min,螺杆速度200r/min,计量泵转速30r/min,熔融塑化温度为200℃,模头温度为200℃;
(2)将步骤(1)得到的未拉伸的聚苯硫醚双拉膜片进行双轴拉伸,拉伸方法采用先在长度方向上纵向拉伸,再在宽度方向上进行横向拉伸的依次双轴拉伸法,所述纵向拉伸:将双拉膜片送入纵向拉伸辊,在膜的纵向方向上进行拉伸,拉伸倍率为2.5倍,拉伸温度为92℃,然后用20℃的冷却辊组冷却;所述横向拉伸:将经过纵向拉伸的厚片送入横向拉伸机进行横向拉伸,预热温度90℃,预热时间18s;拉伸温度为100℃,拉伸倍率3.0倍;随后对该拉伸膜在宽度方向上进行松弛的同时进行热定型,热定型温度150℃,时间10s,松弛率2%,最后冷却至室温,即得聚苯硫醚双拉膜。
本实施例制备的聚苯硫醚双拉膜,250℃条件下的热收缩率为0.7%,表面粗糙度0.19um,绝缘破坏强度238kv/mm。
实施例3
一种聚苯硫醚双拉膜,由如下重量份数的原料制成:聚苯硫醚树脂90份,硫化钠2份,三氧化二铬2份,乙烯-丙烯酸共聚物1份,苯甲酸铝1份,氮化硼2份,氨化铍2份,氨基吡唑2份,甲基丙烯酸甲酯一丁二烯一苯乙烯共聚物2份。
上述聚苯硫醚双拉膜的制备方法,按照如下步骤进行:
(1)将上述原料混合,经双螺杆挤出机熔融共混挤出,向表面温度为50℃的物料施加静电荷冷辊输送的同时进行密合冷却固化,得到未拉伸的聚苯硫醚双拉膜片;
其中,喂料速度60r/min,螺杆速度300r/min,计量泵转速60r/min,熔融塑化温度为230℃,模头温度为250℃;
(2)将步骤(1)得到的未拉伸的聚苯硫醚双拉膜片进行双轴拉伸,拉伸方法采用先在长度方向上纵向拉伸,再在宽度方向上进行横向拉伸的依次双轴拉伸法,所述纵向拉伸:将双拉膜片送入纵向拉伸辊,在膜的纵向方向上进行拉伸,拉伸倍率为4.5倍,拉伸温度为122℃,然后用50℃的冷却辊组冷却;所述横向拉伸:将经过纵向拉伸的厚片送入横向拉伸机进行横向拉伸,预热温度110℃,预热时间25s;拉伸温度为130℃,拉伸倍率5.0倍;随后对该拉伸膜在宽度方向上进行松弛的同时进行热定型,热定型温度170℃,时间20s,松弛率7%,最后冷却至室温,即得聚苯硫醚双拉膜。
本实施例制备的聚苯硫醚双拉膜,250℃条件下的热收缩率为0.6%,表面粗糙度0.19um,绝缘破坏强度240kv/mm。
实施例4
一种聚苯硫醚双拉膜,由如下重量份数的原料制成:聚苯硫醚树脂70份,硫化钠1.5份,三氧化二铬1.5份,二-[4-叔丁基苯甲酸]羟基铝1.5份,甲基苯并三氮唑3.5份,聚磷酸盐1.5份,聚丙烯纤维1.5份,氧化镧1份。
上述聚苯硫醚双拉膜的制备方法,按照如下步骤进行:
(1)将上述原料混合,经双螺杆挤出机熔融共混挤出,向表面温度为45℃的物料施加静电荷冷辊输送的同时进行密合冷却固化,得到未拉伸的聚苯硫醚双拉膜片;
其中,喂料速度50r/min,螺杆速度250r/min,计量泵转速40r/min,熔融塑化温度为210℃,模头温度为230℃;
(2)将步骤(1)得到的未拉伸的聚苯硫醚双拉膜片进行双轴拉伸,拉伸方法采用先在长度方向上纵向拉伸,再在宽度方向上进行横向拉伸的依次双轴拉伸法,所述纵向拉伸:将双拉膜片送入纵向拉伸辊,在膜的纵向方向上进行拉伸,拉伸倍率为3倍,拉伸温度为101℃,然后用30℃的冷却辊组冷却;所述横向拉伸:将经过纵向拉伸的厚片送入横向拉伸机进行横向拉伸,预热温度100℃,预热时间20s;拉伸温度为111℃,拉伸倍率4.0倍;随后对该拉伸膜在宽度方向上进行松弛的同时进行热定型,热定型温度160℃,时间15s,松弛率4%,最后冷却至室温,即得聚苯硫醚双拉膜。
本实施例制备的聚苯硫醚双拉膜,250℃条件下的热收缩率为0.4%,表面粗糙度0.18um,绝缘破坏强度235kv/mm。
实施例5
一种聚苯硫醚双拉膜,由如下重量份数的原料制成:聚苯硫醚树脂70份,硫化钠1.5份,三氧化二铬1.5份,二-[4-叔丁基苯甲酸]羟基铝1.5份,甲基苯并三氮唑3.5份,聚磷酸盐1.5份,聚丙烯纤维1.5份,铯榴石粉1份。
上述聚苯硫醚双拉膜的制备方法,按照如下步骤进行:
(1)将上述原料混合,经双螺杆挤出机熔融共混挤出,向表面温度为45℃的物料施加静电荷冷辊输送的同时进行密合冷却固化,得到未拉伸的聚苯硫醚双拉膜片;
其中,喂料速度50r/min,螺杆速度250r/min,计量泵转速40r/min,熔融塑化温度为210℃,模头温度为230℃;
(2)将步骤(1)得到的未拉伸的聚苯硫醚双拉膜片进行双轴拉伸,拉伸方法采用先在长度方向上纵向拉伸,再在宽度方向上进行横向拉伸的依次双轴拉伸法,所述纵向拉伸:将双拉膜片送入纵向拉伸辊,在膜的纵向方向上进行拉伸,拉伸倍率为3倍,拉伸温度为101℃,然后用30℃的冷却辊组冷却;所述横向拉伸:将经过纵向拉伸的厚片送入横向拉伸机进行横向拉伸,预热温度100℃,预热时间20s;拉伸温度为111℃,拉伸倍率4.0倍;随后对该拉伸膜在宽度方向上进行松弛的同时进行热定型,热定型温度160℃,时间15s,松弛率4%,最后冷却至室温,即得聚苯硫醚双拉膜。
本实施例制备的聚苯硫醚双拉膜,250℃条件下的热收缩率为0.4%,表面粗糙度0.11um,绝缘破坏强度235kv/mm。
以上公开的仅为本发明的几个具体实施例,但是,本发明并非局限于此,任何本领域的技术人员能思之的变化都应落入本发明的保护范围。
Claims (6)
1.一种聚苯硫醚双拉膜,其特征在于,由如下重量份数的原料制成:聚苯硫醚树脂60-90份,硫化钠1-2份,三氧化二铬1-2份,成核剂1-2份,导热剂3-4份,抗氧剂1-2份,增韧剂1-2份。
2.根据权利要求1所述一种聚苯硫醚双拉膜,其特征在于,所述成核剂为二-[4-叔丁基苯甲酸]羟基铝,苯基膦酸钠,多元醇二缩醛-氧化铝接枝物,乙烯-丙烯酸共聚物,乙烯-丙烯酸离聚物,对叔丁基苯甲酸羟基铝,苯甲酸钠,苯甲酸铝中的一种或一种以上。
3.根据权利要求1所述一种聚苯硫醚双拉膜,其特征在于,所述导热剂为甲基苯并三氮唑,三乙醇胺,三聚磷酸钠,氮化硼,聚醚,硅藻土,氨化铍中的一种或一种以上。
4.根据权利要求1所述一种聚苯硫醚双拉膜,其特征在于,所述抗氧剂为聚磷酸盐,二丁基二硫代氨基甲酸锌,氨基吡唑,三聚氰酸,亚硝酸钙中的一种或一种以上。
5.根据权利要求1所述一种聚苯硫醚双拉膜,其特征在于,所述增韧剂为聚丙烯纤维,季戊四醇硬脂酸酯,甲基丙烯酸甲酯一丁二烯一苯乙烯共聚物,醋酸乙烯,二乙基羟胺中的一种或一种以上。
6.权利要求1所述聚苯硫醚双拉膜的制备方法,其特征在于,按照如下步骤进行:
(1)将权利要求1所述原料混合,经双螺杆挤出机熔融共混挤出,向表面温度为40-50℃的物料施加静电荷冷辊输送的同时进行密合冷却固化,得到未拉伸的聚苯硫醚双拉膜片;
其中,喂料速度30-60r/min,螺杆速度200-300r/min,计量泵转速30-60r/min,熔融塑化温度为200-230℃,模头温度为200-250℃;
(2)将步骤(1)得到的未拉伸的聚苯硫醚双拉膜片进行双轴拉伸,拉伸方法采用先在长度方向上纵向拉伸,再在宽度方向上进行横向拉伸的依次双轴拉伸法,所述纵向拉伸:将双拉膜片送入纵向拉伸辊,在膜的纵向方向上进行拉伸,拉伸倍率为2.5-4.5倍,拉伸温度为92-122℃,然后用20-50℃的冷却辊组冷却;所述横向拉伸:将经过纵向拉伸的厚片送入横向拉伸机进行横向拉伸,预热温度90℃-110℃,预热时间18-25s;拉伸温度为100℃-130℃,拉伸倍率3.0-5.0倍;随后对该拉伸膜在宽度方向上进行松弛的同时进行热定型,热定型温度150℃-170℃,时间10-20s,松弛率2-7%,最后冷却至室温,即得聚苯硫醚双拉膜。
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