CN108410047A - 一种抗紫外老化聚乙烯薄膜、其制备方法及应用 - Google Patents

一种抗紫外老化聚乙烯薄膜、其制备方法及应用 Download PDF

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CN108410047A
CN108410047A CN201810180901.1A CN201810180901A CN108410047A CN 108410047 A CN108410047 A CN 108410047A CN 201810180901 A CN201810180901 A CN 201810180901A CN 108410047 A CN108410047 A CN 108410047A
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白永平
王成乐
李卫东
席丹
殷晓芬
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Wuxi Haite New Material Research Institute Co Ltd
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Abstract

本发明公开了一种抗紫外老化聚乙烯薄膜及其制备方法，所述抗紫外老化聚乙烯薄膜由下述重量分数的各成分制备而成：聚乙烯80～95％、聚合物5～20％；其中，所述聚合物为氯化聚乙烯、氯磺化聚乙烯、交联聚乙烯、乙烯‑醋酸乙烯共聚物、聚苯乙烯‑聚乙烯‑聚丁烯‑聚苯乙烯嵌段共聚物、聚苯乙烯‑聚丁二烯共聚物、马来酸酐接枝聚乙烯中的一种或几种的复合物。本发明的抗紫外老化聚乙烯薄膜的抗紫外老化效果好。

Description

一种抗紫外老化聚乙烯薄膜、其制备方法及应用
技术领域
本发明涉及聚乙烯膜领域，具体涉及一种抗紫外老化聚乙烯薄膜、其制备方法及应用。
背景技术
聚乙烯是一类无臭、无毒的高分子材料，具有优良的耐低温性能，化学稳定性好，能耐大多数酸碱的侵蚀，常温下不溶于一般的溶剂，吸水性小，电绝缘性优良。因此，聚乙烯材料用途十分广泛，主要用来制造薄膜、包装材料、容器、管道、单丝、电线电缆、日用品等，并可作为电视、雷达等的高频绝缘材料。然而聚乙烯在大气、阳光和氧的作用下，容易发生光氧化、热氧化、臭氧分解而导致的老化，会发生变色、龟裂、变脆或粉化，丧失力学性能，特别是在紫外线作用下，聚乙烯很容易发生降解老化。因此，对聚乙烯材料，特别是在薄膜方面的应用，提升聚乙烯薄膜的抗紫外老化性能尤其重要。
发明内容
为解决现有技术中存在的问题，本发明提供一种抗紫外老化聚乙烯薄膜、其制备方法及应用。本发明的抗紫外老化聚乙烯薄膜具有使用方便、生产工艺简单、成本低等优点，同时，因通过聚合物之间的复配不仅提高了产品的相关机械性能，还大大提高了产品的抗紫外老化性能。
本发明的抗紫外老化聚乙烯薄膜，其由下述重量分数的各成分制备而成：
聚乙烯 80～95％、
聚合物 5～20％；
其中，所述聚合物为氯化聚乙烯、氯磺化聚乙烯、交联聚乙烯、乙烯-醋酸乙烯共聚物、聚苯乙烯-聚乙烯-聚丁烯-聚苯乙烯嵌段共聚物(SEBS)、聚苯乙烯-聚丁二烯共聚物(SBS)、马来酸酐接枝聚乙烯中的一种或几种的复合物。
此外，所述的聚乙烯为低密度聚乙烯(LDPE)、高密度聚乙烯(HDPE)、线性低密度聚乙烯(LLDPE)中的一种或几种的复合物。
本发明还提供一种如上所述的抗紫外老化聚乙烯薄膜的制备方法，其包括下述步骤：
(1)将所有原料在40℃～60℃下，真空干燥4～6h；
(2)浆已干燥原料混合，用高速分散机以1000～1500转/分搅拌3～5分钟，使其混合均匀出料；
(3)出料后，在双螺杆挤出机中共混挤出造粒，进料口区温度120℃～150℃，最高温度区170℃～180℃，机头温度比最高温度低5℃，中间段温度递增；然后在80℃下干燥1～2h；
(4)以吹膜机进行吹膜，进料区温度120℃～150℃，机头温度185℃～200℃，中间段温度递增；获得产品。
本发明还提供一种如上所述的抗紫外老化聚乙烯薄膜的应用，将其用作保护膜、农用膜、包装膜。
有益效果
本发明，通过聚合物之间的复配，起到相互协同的作用，增强聚乙烯薄膜的相关机械性能和加工性能；聚乙烯与特定聚合物的复配可以提高聚乙烯薄膜的抗紫外性能；在聚乙烯基体中添加聚合物达到抗紫外效果，可以避免因添加小分子抗紫外剂导致的析出现象，从而使得在包装和保护膜行业不污染其他产品的表面性能；另外，本发明的组分简单、加工成型方便、制备过程易行、成本低，有利于大规模工业生产。
具体实施方式
下面结合实施例详细介绍本发明技术方案，但本发明并不限定于这些实施例。
实施例1
将95kg LDPE、5kg氯磺化聚乙烯在60℃下真空干燥4h后，用高速分散机以1000转/分搅拌5分钟，然后在双螺杆挤出机中进行挤出造粒，将粒料在80℃下干燥2h，用上吹风法吹膜机进行吹膜获得本发明的抗紫外老化聚乙烯薄膜，其中，挤出机温度设定如下表1所示，吹膜机温度如下表2所示。
表1
一区 二区 三区 四区 五区 六区 七区 机头
130℃ 140℃ 150℃ 160℃ 170℃ 170℃ 170℃ 165℃
表2
一区 二区 三区 连接处 机头
140℃ 160℃ 180℃ 185℃ 190℃
断裂伸长率的对比测试依据和测试结果列于表3。
实施例2
将95kg LLDPE、5kg氯化聚乙烯在40℃下真空干燥4h后，用高速分散机以1500转/分搅拌5分钟，然后在双螺杆挤出机中进行挤出造粒，将粒料在80℃下干燥2h，用上吹风法吹膜机进行吹膜获得本发明的抗紫外老化聚乙烯薄膜，其中，挤出机温度及吹膜机温度设定与实施例1相同。断裂伸长率的对比测试依据和测试结果列于表3。
实施例3
将50kg LLDPE、40kgHDPE、10kg乙烯-醋酸乙烯共聚物在40℃下真空干燥4h后，用高速分散机以1000转/分搅拌5分钟，然后在双螺杆挤出机中进行挤出造粒，将粒料在60℃下干燥2h，用上吹风法吹膜机进行吹膜获得本发明的抗紫外老化聚乙烯薄膜，其中，挤出机温度及吹膜机温度设定与实施例1相同。断裂伸长率的对比测试依据和测试结果列于表3。
实施例4
将70kgLDPE、25kgLLDPE、5kg交联聚乙烯在60℃下真空干燥4h后，用高速分散机以1000转/分搅拌5分钟，然后在双螺杆挤出机中进行挤出造粒，将粒料在80℃下干燥2h，用上吹风法吹膜机进行吹膜获得本发明的抗紫外老化聚乙烯薄膜，其中，挤出机温度及吹膜机温度设定与实施例1相同。断裂伸长率的对比测试依据和测试结果列于表3。
实施例5
将90kgLLDPE、5kgSEBS和5kg氯磺化聚乙烯在60℃下真空干燥4h后，用高速分散机以1000转/分搅拌5分钟，然后在双螺杆挤出机中进行挤出造粒，将粒料在80℃下干燥2h，用上吹风法吹膜机进行吹膜获得本发明的抗紫外老化聚乙烯薄膜，其中，挤出机温度及吹膜机温度设定与实施例1相同。断裂伸长率的对比测试依据和测试结果列于表3。
实施例6
将80kgLDPE、5kg SBS和15kg氯磺化聚乙烯在60℃下真空干燥4h后，用高速分散机以1000转/分搅拌5分钟，然后在双螺杆挤出机中进行挤出造粒，将粒料在80℃下干燥2h，用上吹风法吹膜机进行吹膜获得本发明的抗紫外老化聚乙烯薄膜，其中，挤出机温度及吹膜机温度设定与实施例1相同。断裂伸长率的对比测试依据和测试结果列于表3。
表3
说明：对比例1为纯的LDPE薄膜；对比例2为有机小分子抗紫外剂5wt％添加量的LDPE复合膜。测试方法为抗紫外老化测试标准ISO 4892-3Cycl 2进行测试，测试周期30天。以万能拉力试验机测试样品断裂伸长率评判机械性能。
上述实例是为了使本领域的普通技术人员理解和应用本发明，并不仅仅局限于此。本领域的专家、学者以及长期从事本领域的技术人员可以很容易对本发明做出修改，并把此发明的精神应用到其他的实例中。因此，本发明不局限于所列举的部分实例，凡是对本发明一般性原理进行简单改进和修改的都应该在本发明的保护范围之内。

Claims (4)

1.一种抗紫外老化聚乙烯薄膜，其特征在于，由下述重量分数的各成分制备而成：
聚乙烯 80～95％、
聚合物 5～20％；
其中，所述聚合物为氯化聚乙烯、氯磺化聚乙烯、交联聚乙烯、乙烯-醋酸乙烯共聚物、聚苯乙烯-聚乙烯-聚丁烯-聚苯乙烯嵌段共聚物、聚苯乙烯-聚丁二烯共聚物、马来酸酐接枝聚乙烯中的一种或几种的复合物。
2.根据权利要求1所述的抗紫外老化聚乙烯薄膜，其特征在于，所述的聚乙烯为低密度聚乙烯、高密度聚乙烯、线性低密度聚乙烯中的一种或几种的复合物。
3.根据权利要求1所述的抗紫外老化聚乙烯薄膜的制备方法，其特征在于，包括下述步骤：
(1)将所有原料在40℃～60℃下，真空干燥4～6h；
(2)浆已干燥原料混合，用高速分散机以1000～1500转/分搅拌3～5分钟，使其混合均匀出料；
(3)出料后，在双螺杆挤出机中共混挤出造粒，进料口区温度120℃～150℃，最高温度区170℃～180℃，机头温度比最高温度低5℃，中间段温度递增；然后在80℃下干燥1～2h；
(4)以吹膜机进行吹膜，进料区温度120℃～150℃，机头温度185℃～200℃，中间段温度递增；获得产品。
4.一种如权利要求1或2所述的抗紫外老化聚乙烯薄膜的应用，其特征在于，将其用作保护膜、农用膜、包装膜。
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Cited By (1)

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CN109627685A (zh) * 2018-10-29 2019-04-16 徐冬 一种紫外屏蔽薄膜

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CN107722431A (zh) * 2017-11-06 2018-02-23 无锡海特新材料研究院有限公司 一种抗紫外老化聚乙烯薄膜及其制备方法

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