CN114989739B - 一种涂布型改色tpu改色膜制备方法 - Google Patents

一种涂布型改色tpu改色膜制备方法 Download PDF

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CN114989739B
CN114989739B CN202210619620.8A CN202210619620A CN114989739B CN 114989739 B CN114989739 B CN 114989739B CN 202210619620 A CN202210619620 A CN 202210619620A CN 114989739 B CN114989739 B CN 114989739B
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山君
宋朝辉
韩志强
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Zhejiang Yuneng New Material Technology Co ltd
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Abstract

本发明提供一种涂布型改色TPU改色膜制备方法,涉及改色膜领域,包括以下步骤:(1)在TPU薄膜的一个面涂覆功能涂层,烘烤固化后,得到预处理薄膜;(2)对预处理薄膜的另一面进行等离子体刻蚀处理,随后得到表面改性TPU薄膜;(3)在表面改性TPU薄膜的刻蚀面均匀涂覆一层水性色胶,烘烤干燥固化后,在水性色胶层表面粘附压敏胶层,即得涂布型TPU改色膜。本发明对TPU薄膜预先进行等离子体偏压刻蚀处理,在薄膜上形成纳米级图案,使得薄膜该面的粗糙度增大,使得胶料与薄膜的接触面增大,有利于色胶层与薄膜的结合,提高了色胶层的牢固性,色胶层不易脱落,由于涂层与薄膜的牢固性提高,使得薄膜的整体性能得到较好的改善。

Description

一种涂布型改色TPU改色膜制备方法
技术领域
本发明涉及改色膜技术领域,具体涉及一种涂布型改色TPU改色膜制备方法。
背景技术
车身改色是用色系丰富,颜色多样的薄膜,以整体覆盖粘贴的方式改变全车或局部外观的服务。车身改色膜主要通过高分子聚合材料贴附于车身表面,易揭除。
公开号为CN109868073A的专利,公开了一种具有自修复功能的改色膜,其包括自下而上依次由压敏胶层、颜色涂层、热塑性聚氨酯薄膜和热固性聚氨酯涂层叠合复合而成。公开号为CN114163940A的专利,一种热塑性聚氨酯弹性体改色膜及其制备方法,其包括自上而下由第一离型膜层、压敏胶层、第一基材层、颜色层、第二基材层。
上述专利中的改色膜,都是色胶层与TPU薄膜直接粘结,但二者的粘结效果较为一般,容易发生脱落的情况,导致改色膜的整体性能受到影响。为此,我们提出了一种涂布型改色TPU改色膜制备方法。
发明内容
针对现有技术不足,本发明提供一种涂布型改色TPU改色膜制备方法,以此来克服背景技术中提及的问题。
为实现以上目的,本发明的技术方案通过以下技术方案予以实现:一种涂布型改色TPU改色膜制备方法,具体包括以下步骤:
(1)在TPU薄膜的其中一个面涂覆功能涂层,烘烤固化后,得到预处理薄膜;
(2)对预处理薄膜的另一面进行等离子体刻蚀处理,随后得到表面改性TPU薄膜;
(3)在表面改性TPU薄膜的刻蚀面均匀涂覆一层水性色胶,烘烤干燥固化后,在水性色胶层表面粘附压敏胶层,即得涂布型TPU改色膜。
优选的,所述等离子体刻蚀处理采用的气体为氧气和氩气混合物,其中氧气含量占0.2-0.8%。
优选的,所述等离子体刻蚀过程中的放电电压为2-4kV,放电时间为150-220s。
优选的,在等离子体刻蚀处理基础上,加入400-500V偏压源。
优选的,所述功能涂层为聚氨酯和抗氧剂1010组成,其中抗氧剂含量占1-2%。
优选的,所述水性色胶按如下步骤制备,S1:按重量份取水性聚氨酯分散体40-60份、颜填料15-25份、消泡剂0.5-2份、分散剂1-3份、增稠剂0.5-1份、流平剂0.5-1份、去离子水10-12份;S2:将分散剂和去离子水加入电热搅拌器中搅拌,接着加入水性聚氨酯分散体和颜填料并搅拌均匀,随后加入消泡剂、增稠剂和流平剂,均匀搅拌后,即得水性色胶。
优选的,步骤S2中,控制搅拌温度为35-55℃,搅拌速度为1500-2000r/min。
优选的,所述消泡剂为磷酸三丁酯;所述分散剂为聚羧酸钠盐。
优选的,所述增稠剂为甲基纤维素、羧甲基纤维素、羟乙基纤维素中的一种或几种;所述流平剂为芳烷基改性聚甲基硅氧烷、聚醚改性聚二甲基硅氧烷中的一种或几种。
本发明提供一种涂布型改色TPU改色膜制备方法,与现有技术相比优点在于:
(1)本发明对TPU薄膜预先进行等离子体偏压刻蚀处理,在薄膜上形成分布较为均匀的纳米级图案,使得薄膜该面的粗糙度增大,由于刻痕细小,对薄膜的强度影响较小,但粗糙度的增大,使得胶料与薄膜的接触面增大,有利于色胶层与薄膜的结合,提高了色胶层的牢固性,色胶层不易脱落,由于色胶层与薄膜的牢固性提高,使得薄膜的整体性能得到较好的改善;
(2)本发明加入水性色胶来替代传统的溶剂型胶料,以水为溶剂,降低了对环境的影响,更加环保,利用氧气作为反应性气体,以氩气作为载气,对薄膜进行改性,在其表面引入-COOH、-OH等基团,增加了亲水性,进一步提高了其与水性色胶的结合力。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚,下面结合本发明实施例对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1
一种涂布型改色TPU改色膜制备方法,包括以下步骤:
(1)在TPU薄膜的其中一个面涂覆功能涂层,烘烤固化后,得到预处理薄膜;其中,功能涂层为聚氨酯和抗氧剂1010组成,其中抗氧剂含量占1.5%;
(2)对预处理薄膜的另一面进行等离子体刻蚀处理,随后得到表面改性TPU薄膜;其中,等离子体刻蚀处理采用的气体为氧气和氩气混合物,其中氧气含量占0.5%,等离子体刻蚀过程中的放电电压为3kV,放电时间为180s,在等离子体刻蚀处理基础上,加入450V偏压源;
(3)在表面改性TPU薄膜的刻蚀面均匀涂覆一层水性色胶,烘烤干燥固化后,在水性色胶层表面粘附压敏胶层,即得涂布型TPU改色膜。其中,压敏胶采用丙烯酸酯压敏胶。
水性色胶按如下步骤制备:
S1:按重量份取水性聚氨酯分散体50份、颜填料20份、消泡剂1份、分散剂2、增稠剂0.7份、流平剂0.8份、去离子水11份;
S2:将分散剂和去离子水加入电热搅拌器中搅拌,接着加入水性聚氨酯分散体和颜填料并搅拌均匀,随后加入消泡剂、增稠剂和流平剂,均匀搅拌后,即得水性色胶。其中,控制搅拌温度为45℃,搅拌速度为1800r/min。
消泡剂为磷酸三丁酯,分散剂为聚羧酸钠盐,增稠剂为甲基纤维素,流平剂为芳烷基改性聚甲基硅氧烷。
实施例2
在实施例1的基础上,水性色胶替换为如下步骤制备:
S1:按重量份取水性聚氨酯分散体40份、颜填料15份、消泡剂0.5份、分散剂1份、增稠剂0.5份、流平剂0.5份、去离子水10份;
S2:将分散剂和去离子水加入电热搅拌器中搅拌,接着加入水性聚氨酯分散体和颜填料并搅拌均匀,随后加入消泡剂、增稠剂和流平剂,均匀搅拌后,即得水性色胶。其中,控制搅拌温度为35℃,搅拌速度为1500r/min。
消泡剂为磷酸三丁酯,分散剂为聚羧酸钠盐,增稠剂为羧甲基纤维素,流平剂为芳烷基改性聚甲基硅氧烷。
实施例3
在实施例1的基础上,水性色胶替换为如下步骤制备:
S1:按重量份取水性聚氨酯分散体60份、颜填料25份、消泡剂2份、分散剂3份、增稠剂1份、流平剂1份、去离子水12份;
S2:将分散剂和去离子水加入电热搅拌器中搅拌,接着加入水性聚氨酯分散体和颜填料并搅拌均匀,随后加入消泡剂、增稠剂和流平剂,均匀搅拌后,即得水性色胶。其中,控制搅拌温度为55℃,搅拌速度为2000r/min。
消泡剂为磷酸三丁酯,分散剂为聚羧酸钠盐,增稠剂为羟乙基纤维素,流平剂为聚醚改性聚二甲基硅氧烷。
实施例4
一种涂布型改色TPU改色膜制备方法,该TPU改色膜的制备方法包括以下步骤:
(1)在TPU薄膜的其中一个面涂覆功能涂层,烘烤固化后,得到预处理薄膜;其中,功能涂层为聚氨酯和抗氧剂1010组成,其中抗氧剂含量占1%;
(2)对预处理薄膜的另一面进行等离子体刻蚀处理,随后得到表面改性TPU薄膜;其中,等离子体刻蚀处理采用的气体为氧气和氩气混合物,其中氧气含量占0.2%,等离子体刻蚀过程中的放电电压为2kV,放电时间为150s,在等离子体刻蚀处理基础上,加入400V偏压源。
(3)在表面改性TPU薄膜的刻蚀面均匀涂覆一层水性色胶,烘烤干燥固化后,在水性色胶层表面粘附压敏胶层,即得涂布型TPU改色膜。其中,压敏胶采用丙烯酸酯压敏胶。
采用实施例1中的水性色胶。
实施例5
一种涂布型改色TPU改色膜制备方法,该TPU改色膜的制备方法包括以下步骤:
(1)在TPU薄膜的其中一个面涂覆功能涂层,烘烤固化后,得到预处理薄膜;其中,功能涂层为聚氨酯和抗氧剂1010组成,其中抗氧剂含量占2%;
(2)对预处理薄膜的另一面进行等离子体刻蚀处理,随后得到表面改性TPU薄膜;其中,等离子体刻蚀处理采用的气体为氧气和氩气混合物,其中氧气含量占0.8%,等离子体刻蚀过程中的放电电压为4kV,放电时间为220s,在等离子体刻蚀处理基础上,加入500V偏压源。
(3)在表面改性TPU薄膜的刻蚀面均匀涂覆一层水性色胶,烘烤干燥固化后,在水性色胶层表面粘附压敏胶层,即得涂布型TPU改色膜。其中,压敏胶采用丙烯酸酯压敏胶。
采用实施例1中的水性色胶。
对比例1
以实施例1位基础,将水性色胶替换为溶剂型聚氨酯胶料,溶剂型聚氨酯胶料中溶剂型聚氨酯胶黏剂含量为75%,颜填料含量为25%。
对比例2
一种涂布型改色TPU改色膜制备方法,包括以下步骤:
(1)在TPU薄膜的其中一个面涂覆功能涂层,烘烤固化后,得到预处理薄膜;其中,功能涂层为聚氨酯和抗氧剂1010组成,其中抗氧剂含量占1.5%;
(2)在预处理薄膜的另一面均匀涂覆一层水性色胶,烘烤干燥固化后,在水性色胶层表面粘附压敏胶层,即得涂布型TPU改色膜。
对比例3
一种涂布型改色TPU改色膜制备方法,包括以下步骤:
(1)在TPU薄膜的其中一个面涂覆功能涂层,烘烤固化后,得到预处理薄膜;其中,功能涂层为聚氨酯和抗氧剂1010组成,其中抗氧剂含量占1.5%;
(2)在预处理薄膜的另一面均匀涂覆一层聚氨酯胶料,烘烤干燥固化后,在聚氨酯胶料表面粘附压敏胶层,即得涂布型TPU改色膜。其中,压敏胶采用丙烯酸酯压敏胶。
性能检测
1、耐候测试:对实施例及对比例中的改色膜性能进行测试,将TPU改色膜贴在模拟汽车外壳的板材上,在户外条件放置,每隔一个月观察是否有变色脱落等现象,若无变色、脱落,且光泽无明显变化为优;若无变色脱落,光泽有轻微变化为良;若有变色、脱落等现象为差。具体结果如表1所示。
表1
Figure BDA0003675748540000061
Figure BDA0003675748540000071
由上表可知,对TPU薄膜予以等离子体刻蚀处理后的改色膜,其耐候性更加优越,说明TPU表面粗糙度增加和引入的新基团,能更好的和水性色胶粘结,提高了粘结性,不易脱胶脱落。
2、强度性能:对实施例及对比例中的改色膜性能进行测试,按照《GB/T 13022-1991塑料薄膜拉伸性能试验方法》测试样品的拉伸强度和断裂伸长率。拉伸强度≥20MPa,满足车衣膜行业标准,评定为好;拉伸强度<20MPa,不满足车衣膜行业标准,评定为差。伸长率≥500%,性能为好;伸长率<500%,性能为差。具体结果如表2所示。
表2
组分 拉伸强度/MPa 断裂伸长率/%
实施例1 28.5 760
实施例2 30.3 550
实施例3 27.2 790
实施例4 27.9 785
实施例5 25.8 812
对比例1 28.2 780
对比例2 23.7 828
对比例3 22.1 803
需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (6)

1.一种涂布型改色TPU改色膜制备方法,其特征在于,该TPU改色膜的制备方法包括以下步骤:
(1)在TPU薄膜的其中一个面涂覆功能涂层,烘烤固化后,得到预处理薄膜;
(2)对预处理薄膜的另一面进行等离子体刻蚀处理,随后得到表面改性TPU薄膜;
(3)在表面改性TPU薄膜的刻蚀面均匀涂覆一层水性色胶,烘烤干燥固化后,在水性色胶层表面粘附压敏胶层,即得涂布型TPU改色膜;
所述等离子体刻蚀处理采用的气体为氧气和氩气混合物,其中氧气含量占0.2-0.5%;
所述等离子体刻蚀过程中的放电电压为2-3kV,放电时间为150-180s;
在等离子体刻蚀处理基础上,加入400-450V偏压源。
2.根据权利要求1所述的一种涂布型改色TPU改色膜制备方法,其特征在于:所述功能涂层为聚氨酯和抗氧剂1010组成,其中抗氧剂含量占1-2%。
3.根据权利要求1所述的一种涂布型改色TPU改色膜制备方法,其特征在于:所述水性色胶按如下步骤制备:
S1:按重量份取水性聚氨酯分散体40-60份、颜填料15-25份、消泡剂0.5-2份、分散剂1-3份、增稠剂0.5-1份、流平剂0.5-1份、去离子水10-12份;
S2:将分散剂和去离子水加入电热搅拌器中搅拌,接着加入水性聚氨酯分散体和颜填料并搅拌均匀,随后加入消泡剂、增稠剂和流平剂,均匀搅拌后,即得水性色胶。
4.根据权利要求3所述的一种涂布型改色TPU改色膜制备方法,其特征在于:步骤S2中,控制搅拌温度为35-55℃,搅拌速度为1500-2000r/min。
5.根据权利要求3所述的一种涂布型改色TPU改色膜制备方法,其特征在于:所述消泡剂为磷酸三丁酯;所述分散剂为聚羧酸钠盐。
6.根据权利要求3所述的一种涂布型改色TPU改色膜制备方法,其特征在于:所述增稠剂为甲基纤维素、羧甲基纤维素、羟乙基纤维素中的一种或几种;所述流平剂为芳烷基改性聚甲基硅氧烷、聚醚改性聚二甲基硅氧烷中的一种或几种。
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