CN110964274A - 一种抗迁移pvc膜及其制备方法 - Google Patents

一种抗迁移pvc膜及其制备方法 Download PDF

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CN110964274A
CN110964274A CN201911321356.4A CN201911321356A CN110964274A CN 110964274 A CN110964274 A CN 110964274A CN 201911321356 A CN201911321356 A CN 201911321356A CN 110964274 A CN110964274 A CN 110964274A
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江溪
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Abstract

本发明公开了一种抗迁移PVC膜,其制备原料包括以下重量份的组分:PVC树脂粉80~100份,聚酯增塑剂30~60份,环氧大豆油0.1~5份,无机添加剂0.1~3份,以及聚甲基丙烯酸甲酯和热稳定剂1~10份。本发明通过压延工艺制成透明性、柔韧性俱佳的抗迁移PVC薄膜,从而令高油份产品在不影响透明性的情况下减少增塑剂迁移,最终达到避免与其它印刷物或有色物体接触时产生迁移或者反印的现象。

Description

一种抗迁移PVC膜及其制备方法
技术领域
本发明涉及PVC薄膜技术领域,尤其是一种抗迁移PVC膜及其制备方法。
背景技术
现有的文件夹等文具用途产品,由于需要折叠,弯曲等,对此类要求有较高的柔韧性,都属于高油份PVC薄膜产品,所以配方中都添加了大量的增塑剂。但由于普通的增塑剂分子量较小,随着时间的推移,这些高油份产品中含有的大量增塑剂就会慢慢地往表面迁移,在表面形成一层油状物,当与其它文档或文件接触时,文档资料印刷面就会反印到PVC薄膜上面,有时甚至影响文档的正常阅读使用。
发明内容
基于上述问题,本发明的目的在于克服上述现有技术的不足之处而提供一种抗迁移PVC膜及其制备方法。
为实现上述目的,本发明采取的技术方案为:
一种抗迁移PVC膜,所述PVC膜的制备原料包括以下重量份的组分:PVC树脂粉80~100份,聚酯增塑剂30~60份,环氧大豆油0.1~5份,无机添加剂0.1~3份,以及聚甲基丙烯酸甲酯和热稳定剂1~10份。其中,聚甲基丙烯酸甲酯和热稳定剂作为其它添加剂,两者的重量份之和为1~10份即可,同时,聚甲基丙烯酸甲酯和热稳定剂各自重量份不得为零。
优选地,所述PVC树脂粉k值为60、65或70。
优选地,所述聚酯增塑剂为己二酸类多元醇聚酯。更优选地,所述己二酸类多元醇聚酯为己二酸二元醇聚酯,平均分子量在1000~4000之间。
优选地,所述无机添加剂为纳米级滑石粉。更优选地,所述纳米级滑石粉分子式为Mg3[Si4O10](OH)2
优选地,所述纳米级滑石粉平均粒径小于3微米。
优选地,所述纳米级滑石粉的重量份为0.2~0.8。
优选地,所述热稳定剂为钡锌热稳定剂。
作为本发明的另一个方面,本发明提供了上述的PVC膜的制备方法,包括以下步骤:
(1)按质量份数称取所述组分,混合均匀后密炼塑化,之后再次塑化使之均匀,得到胶料,所得胶料过滤;
(2)步骤(1)过滤后所得胶料,通过压延轮压延,之后,经过由镜面钢轮与粗糙度为Ra 0.07~0.12μm的橡胶轮组成的轮组压花成型;
(3)步骤(2)压花所得薄膜由引出轮引出后,经过30~120℃温炼轮及10~50℃冷却轮组定型,然后,依次经裁边、预热、加压、收卷,即得所述PVC膜。
优选地,所述步骤(2)中压延机为倒L型4轮压延机,所述倒L型4轮压延机的第三轮和第四轮的轮面为电镀镜面。
综上所述,本发明的有益效果为:
本发明针对高油份透明PVC膜在配方中使用高分子量的聚酯型增塑剂,替代常规的小分子量增塑剂,同时搭配使用少量的纳米级无机添加剂,改善高分子增塑剂加工时容易在压延轮表面析出导致产品发雾,从而影响产品透明性的问题,通过压延工艺制成透明性、柔韧性俱佳的抗迁移PVC薄膜,从而令高油份产品在不影响透明性的情况下减少增塑剂的迁移,最终达到避免与其它印刷物或有色物体接触时产生迁移或者反印的现象。
附图说明
图1为本发明的PVC膜的制备方法的示意图;
其中,1、高速混合机,2、密炼机,3、双辊开炼机,4、过滤机,5、压延轮,6、引出轮,7、镜面钢轮,8、橡胶轮,9、温炼轮,10、磅料系统,11、漏斗,12、过滤网,13、第三轮,14、第四轮,15、冷却轮组,16、卷取机。
具体实施方式
本发明针对高油份透明PVC膜在配方中使用高分子量的聚酯型增塑剂,同时搭配使用纳米级的无机添加剂,通过压延工艺加工制成高柔性抗迁移PVC薄膜,从而令高油份产品在不影响透明性的情况下减少增塑剂迁移或析出,最终达到避免与其它印刷物或有色物体接触时产生迁移或者反印的现象,由此,本发明的PVC膜尤其适合于文具文件用途。
在一些实施例中,本发明的PVC膜的制备原料包括如下重量份的组分:PVC树脂粉80-100份,聚酯增塑剂30-60份,环氧大豆油0.1-5份,无机添加剂0.1-3份,以及其它添加剂1-10份。其中,PVC树脂粉为k值k-60、k-65或k-70的PVC树脂粉,聚酯增塑剂为己二酸类多元醇聚酯,无机添加剂为纳米级滑石粉,其分子式为Mg3[Si4O10](OH)2。其它添加剂为聚甲基丙烯酸甲酯以及钡锌热稳定剂。在一些实施例中,所述己二酸类多元醇聚酯优选己二酸二元醇聚酯,平均分子量在1000-4000之间。
在本发明中,滑石粉主要作用是改善聚酯增塑剂在加工时溶剂在压延轮表面析出导致产品发雾而影响透明性。在一些实施例中,滑石粉要求平均粒径小于3微米,纳米级最佳;纳米级滑石粉的最合适添加量为0.2-0.8份之间,小于此范围或高出此用量,所制备的PVC膜的透明性都会降低。
为更好的说明本发明的目的、技术方案和优点,下面将结合附图和具体实施例对本发明作进一步说明。如无特别说明,本发明中的试剂或材料均可从市场上获得;如无特别说明,本发明中的方法、工艺均为本领域的常规方法和常规工艺。
实施例1
本发明的抗迁移PVC膜的一种实施例,其制备原料包括以下重量份的组分:PVC树脂粉80份,己二酸二元醇聚酯60份,环氧大豆油0.1份,纳米级滑石粉3份,以及聚甲基丙烯酸甲酯0.2份和钡锌热稳定剂0.8份份。
其中,PVC树脂粉k值为65;己二酸二元醇聚酯,平均分子量在1000~4000之间;
纳米级滑石粉分子式为Mg3[Si4O10](OH)2,纳米级滑石粉平均粒径小于3微米,纳米级滑石粉的重量份为0.8。
实施例2
本发明的抗迁移PVC膜的一种实施例,其制备原料包括以下重量份的组分:PVC树脂粉91份,己二酸二元醇聚酯45份,环氧大豆油2.3份,纳米级滑石粉1.6份,以及聚甲基丙烯酸甲酯和钡锌热稳定剂5份。
其中,PVC树脂粉k值为70;己二酸二元醇聚酯,平均分子量在1000~4000之间;
纳米级滑石粉分子式为Mg3[Si4O10](OH)2,纳米级滑石粉平均粒径小于3微米,纳米级滑石粉的重量份为0.56。
实施例3
本发明的抗迁移PVC膜的一种实施例,其制备原料包括以下重量份的组分:PVC树脂粉100份,己二酸二元醇聚酯30份,环氧大豆油5份,纳米级滑石粉0.1份,以及聚甲基丙烯酸甲酯和钡锌热稳定剂10份。
其中,PVC树脂粉k值为60;己二酸二元醇聚酯,平均分子量在1000~4000之间;
纳米级滑石粉分子式为Mg3[Si4O10](OH)2,纳米级滑石粉平均粒径小于3微米,纳米级滑石粉的重量份为0.2。
实施例4
上述实施例1~3的抗迁移PVC膜的制备方法的一种实施例,参见图1,包括以下步骤:
(1)按质量份数称取所述组分,经高速混合机1混合均匀后在密炼机2密炼塑化,之后经过滤机4再次塑化使之均匀,得到胶料,所得胶料经过滤网12过滤;
(2)步骤(1)过滤后所得胶料,通过压延轮5压延,之后,经过由镜面钢轮7与粗糙度为Ra 0.07~0.12μm的橡胶轮8组成的轮组压花成型;
(3)步骤(2)压花所得薄膜由引出轮6引出后,经过30~120℃温炼轮9及10~50℃冷却轮组15定型,然后,依次经裁边、预热、加压、收卷,即得PVC膜。
其中,步骤(2)中压延机为倒L型4轮压延机,所述倒L型4轮压延机的第三轮和第四轮的轮面为电镀镜面。
本发明采用上述压延工艺(参见图1)加工制成厚度为0.1~1.0mm的透明PVC薄膜。其中:
1、压延轮的温度范围在160-215摄氏度之间。
2、压延轮的速度范围在5-70M/min。
3、卷取机收卷速度为0-150m/min。
4、混合机温度不高于125摄氏度。
5、过滤挤出机(即密炼机2)不高于180摄氏度。
6、冷却轮组15温度控制在10-50摄氏度之间。
实施例5本发明实施例1~3的抗迁移PVC膜的性能测试
(1)抗迁移防反印测试
测试方法:将压延制成的PVC薄膜切成A4大小,然后将一张用“HP”墨水打印的A4纸贴在薄膜上,使打印面直接接触到PVC薄膜。接着在纸上盖上一块钢板,然后在上面放置一个5公斤的砝码,最后放入50℃干燥箱(相对湿度小于60%),72小时后,取出PVC薄膜并评估测试结果。
测试结果显示:没有明显的墨水从纸张转移到PVC薄膜上,表明本发明的PVC薄膜具有抗迁移或防反印功能。
(2)透明塑料混浊度标准测试
测试方法:美国ASTM D-1003,标准要求测试值≤4;
测试结果显示,实施例1~3的PVC膜的测试值均小于1。
(3)透光率测试
测试方法:采用ANSI Z26.1美国陆地公路行驶机动车辆用安全窗机动车辆设备用玻璃材料-安全标准进行测试,要求满足材料的透光率≥70。
测试结果显示实施例1~3的PVC膜的透光率均依次为90.4、108.5和92.7。
最后应当说明的是,以上实施例仅用以说明本发明的技术方案而非对本发明保护范围的限制,尽管参照较佳实施例对本发明作了详细说明,本领域的普通技术人员应当理解,可以对本发明的技术方案进行修改或者等同替换,而不脱离本发明技术方案的实质和范围。

Claims (10)

1.一种抗迁移PVC膜,其特征在于,所述PVC膜的制备原料包括以下重量份的组分:PVC树脂粉80~100份,聚酯增塑剂30~60份,环氧大豆油0.1~5份,无机添加剂0.1~3份,以及聚甲基丙烯酸甲酯和热稳定剂1~10份。
2.根据权利要求1所述的抗迁移PVC膜,其特征在于,所述PVC树脂粉k值为60、65或70。
3.根据权利要求1所述的抗迁移PVC膜,其特征在于,所述聚酯增塑剂为己二酸类多元醇聚酯。
4.根据权利要求3所述的抗迁移PVC膜,其特征在于,所述己二酸类多元醇聚酯为己二酸二元醇聚酯,平均分子量在1000~4000之间。
5.根据权利要求1所述的抗迁移PVC膜,其特征在于,所述无机添加剂为纳米级滑石粉。
6.根据权利要求5所述的抗迁移PVC膜,其特征在于,所述纳米级滑石粉分子式为Mg3[Si4O10](OH)2
7.根据权利要求5所述的抗迁移PVC膜,其特征在于,所述纳米级滑石粉平均粒径小于3微米。
8.根据权利要求5所述的抗迁移PVC膜,其特征在于,所述纳米级滑石粉的重量份为0.2~0.8。
9.根据权利要求1所述的抗迁移PVC膜,其特征在于,所述热稳定剂为钡锌热稳定剂。
10.一种如权利要求1~9任一项所述的PVC膜的制备方法,其特征在于,包括以下步骤:
(1)按质量份数称取所述组分,混合均匀后密炼塑化,之后再次塑化使之均匀,得到胶料,所得胶料过滤;
(2)步骤(1)过滤后所得胶料,通过压延轮压延,之后,经过由镜面钢轮与粗糙度为Ra0.07~0.12μm的橡胶轮组成的轮组压花成型;
(3)步骤(2)压花所得薄膜由引出轮引出后,经过30~120℃温炼轮及10~50℃冷却轮组定型,然后,依次经裁边、预热、加压、收卷,即得所述PVC膜。
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