CN107813560A - 一种抗静电覆膜钢板 - Google Patents

一种抗静电覆膜钢板 Download PDF

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CN107813560A
CN107813560A CN201710807138.6A CN201710807138A CN107813560A CN 107813560 A CN107813560 A CN 107813560A CN 201710807138 A CN201710807138 A CN 201710807138A CN 107813560 A CN107813560 A CN 107813560A
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metal substrate
film
pvf
enamelled coating
steel plate
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赵东明
许日民
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HEFEI HESHENG SPECIAL MATERIAL CO Ltd
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Abstract

本发明公开了一种抗静电覆膜钢板，该覆膜钢板包括金属基板和PVF膜层，所述PVF膜层一侧涂布保护膜层，另一侧贴覆在金属基板一侧上，所述金属基板另一侧涂布背漆层；所述保护膜层为含有抗静电剂的耐高温聚乙烯薄膜，背漆层为含有抗静电剂的环氧漆层；该覆膜钢板的制备方法包括薄膜层的制备、背漆层的制备、金属基板前处理、覆膜、涂漆等过程。本发明在覆膜钢板的表面采用的是PVF膜，其耐候性和抗污染性强、表面光滑细腻，使制得的覆膜钢板兼具耐候、抗污染、平滑的优点；本发明在保护膜层以及背漆层的制备过程中加入了抗静电剂，使得制备得到的覆膜钢板既具有覆膜钢板的优良性能，又具有抗静电性能。

Description

一种抗静电覆膜钢板
技术领域
本发明属于钢塑板领域，具体地，涉及一种抗静电覆膜钢板。
背景技术
在成卷的金属板涂覆涂料或层压上塑料薄膜后，以成卷或单张出售的有机材料/金属复合板材已有几十年的历史，并且得到了越来越广泛的使用。其具有很多优点，例如可将传统的薄板材的涂装变成原料薄钢板的连续涂装，既便于表面处理及涂装的质量控制又不存在易产生涂装缺陷的棱边死角，而得到最佳的涂装质量，其二是金属薄板在涂装线可以高速行进，提高了生产效率，且可便于依据涂料的不同调节行进速度，其三是可以降低生产成本和简化制备的总的生产工艺步骤。
随着现代科技的发展，一些有洁净要求和抗静电要求的墙面和地面的场所，如在航空、化工、电子电器厂房、计算机房、印刷厂、纺织厂及制药厂等场所采用的装饰彩涂钢板，而彩涂钢板表面覆合的许多高分子材料自身的体积电阻率较大，在具体的使用环节中可能会出现静电，所以很多实用彩涂钢板除了优良的装饰性能还需要考虑有抗静电性能。
发明内容
本发明的目的在于提供一种抗静电覆膜钢板，通过在覆膜钢板的背漆以及保护膜层加入抗静电剂，达到优异的抗静电效果。
本发明的目的可以通过以下技术方案实现：
一种抗静电覆膜钢板，包括金属基板和PVF膜层，所述PVF膜层一侧涂布保护膜层，另一侧贴覆在金属基板一侧上，所述金属基板另一侧涂布背漆层；
所述保护膜层为含有抗静电剂的耐高温聚乙烯薄膜，厚度为10-15um；
所述背漆层为含有抗静电剂的环氧漆层，厚度为20-26um。
所述金属基板为镀锌钢板或冷轧钢板，厚度为230-300um。
所述PVF膜层为印刷有图案的耐高温聚氟乙烯薄膜，厚度为85-110um。
所述抗静电剂为全氟正辛烷磺酸四乙基铵盐和氟烷基三甲胺咪唑按照重量比为1:0.3-0.7组成的混合物。
所述抗静电覆膜钢板的制备方法如下：
(1)薄膜层的制备：流延成型将PE树脂薄片经过挤出机熔融塑化后，加入抗静电剂，熔体从T型模头挤出，呈片状流延至平稳旋转的光洁的冷却辊筒的辊面上，经冷却降温定型后，再经牵引、切边、测厚、后处理后卷取得PE保护膜；将PVF树脂薄片经过挤出机熔融塑化后，熔体从T型模头挤出，呈片状流延至平稳旋转的光洁的冷却辊筒的辊面上，经冷却降温定型后，再经牵引、切边、测厚、后处理后卷取得PVF膜；
(2)环氧漆层的制备：将环氧树脂、偶联剂、稳定剂、增塑剂、抗静电剂加入有机溶剂中，在25-35℃下搅拌混合均匀制得；
(3)金属基板前处理：清洗金属基板，除去金属基板表面附着的防锈油、锈斑和灰尘，然后烘干；
(4)覆膜：在烘箱中将金属基板加热到230-250℃的高温，将PE保护膜、PVF膜和金属基板送入上下覆合辊中间，使薄膜在上下辊的压力和高温的作用下与钢板贴覆在一起；
(5)涂漆：在金属基板另一侧的表面涂布一层制备好的环氧漆，进入烘箱烘干，固化，固化温度216-232℃，时间18-22s，形成背漆层。
本发明的有益效果：
(1)本发明在覆膜钢板的表面采用的是PVF膜，相比于传统的PET和PVC膜，其耐候性和抗污染性强、表面光滑细腻，使得制得的覆膜钢板兼具耐候、抗污染、平滑的优点；
(2)本发明在保护膜层以及背漆层的制备过程中加入了抗静电剂，该抗静电剂为全氟正辛烷磺酸四乙基铵盐和氟烷基三甲胺咪唑的混合物，具有优异的抗静电性能，使得制备得到的覆膜钢板既具有覆膜钢板的优良性能，又具有抗静电性能。
具体实施方式
下面将结合实施例对本发明的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅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它实施例，都属于本发明保护的范围。
实施例1
一种抗静电覆膜钢板，包括金属基板和PVF膜层，所述PVF膜层一侧涂布保护膜层，另一侧贴覆在金属基板一侧上，所述金属基板另一侧涂布背漆层；
保护膜层为含有抗静电剂的耐高温聚乙烯薄膜，厚度为10um；
背漆层为含有抗静电剂的环氧漆层，厚度为20um。
金属基板为镀锌钢板或冷轧钢板，厚度为230um。
PVF膜层为印刷有图案的耐高温聚氟乙烯薄膜，厚度为85um。
抗静电剂为全氟正辛烷磺酸四乙基铵盐和氟烷基三甲胺咪唑按照重量比为1:0.3组成的混合物。
所述抗静电覆膜钢板的制备方法如下：
(1)薄膜层的制备：流延成型将PE树脂薄片经过挤出机熔融塑化后，加入抗静电剂，熔体从T型模头挤出，呈片状流延至平稳旋转的光洁的冷却辊筒的辊面上，经冷却降温定型后，再经牵引、切边、测厚、后处理后卷取得PE保护膜；将PVF树脂薄片经过挤出机熔融塑化后，熔体从T型模头挤出，呈片状流延至平稳旋转的光洁的冷却辊筒的辊面上，经冷却降温定型后，再经牵引、切边、测厚、后处理后卷取得PVF膜；
(2)环氧漆层的制备：将环氧树脂、偶联剂、稳定剂、增塑剂、抗静电剂加入有机溶剂中，在25℃下搅拌混合均匀制得；
(3)金属基板前处理：清洗金属基板，除去金属基板表面附着的防锈油、锈斑和灰尘，然后烘干；
(4)覆膜：在烘箱中将金属基板加热到230℃的高温，将PE保护膜、PVF膜和金属基板送入上下覆合辊中间，使薄膜在上下辊的压力和高温的作用下与钢板贴覆在一起；
(5)涂漆：在金属基板另一侧的表面涂布一层制备好的环氧漆，进入烘箱烘干，固化，固化温度216℃，时间18s，形成背漆层。
实施例2
一种抗静电覆膜钢板，包括金属基板和PVF膜层，所述PVF膜层一侧涂布保护膜层，另一侧贴覆在金属基板一侧上，所述金属基板另一侧涂布背漆层；
保护膜层为含有抗静电剂的耐高温聚乙烯薄膜，厚度为12um；
背漆层为含有抗静电剂的环氧漆层，厚度为23um。
金属基板为镀锌钢板或冷轧钢板，厚度为260um。
PVF膜层为印刷有图案的耐高温聚氟乙烯薄膜，厚度为95um。
抗静电剂为全氟正辛烷磺酸四乙基铵盐和氟烷基三甲胺咪唑按照重量比为1:0.5组成的混合物。
所述抗静电覆膜钢板的制备方法如下：
(1)薄膜层的制备：流延成型将PE树脂薄片经过挤出机熔融塑化后，加入抗静电剂，熔体从T型模头挤出，呈片状流延至平稳旋转的光洁的冷却辊筒的辊面上，经冷却降温定型后，再经牵引、切边、测厚、后处理后卷取得PE保护膜；将PVF树脂薄片经过挤出机熔融塑化后，熔体从T型模头挤出，呈片状流延至平稳旋转的光洁的冷却辊筒的辊面上，经冷却降温定型后，再经牵引、切边、测厚、后处理后卷取得PVF膜；
(2)环氧漆层的制备：将环氧树脂、偶联剂、稳定剂、增塑剂、抗静电剂加入有机溶剂中，在30℃下搅拌混合均匀制得；
(3)金属基板前处理：清洗金属基板，除去金属基板表面附着的防锈油、锈斑和灰尘，然后烘干；
(4)覆膜：在烘箱中将金属基板加热到240℃的高温，将PE保护膜、PVF膜和金属基板送入上下覆合辊中间，使薄膜在上下辊的压力和高温的作用下与钢板贴覆在一起；
(5)涂漆：在金属基板另一侧的表面涂布一层制备好的环氧漆，进入烘箱烘干，固化，固化温度225℃，时间20s，形成背漆层。
实施例3
一种抗静电覆膜钢板，包括金属基板和PVF膜层，所述PVF膜层一侧涂布保护膜层，另一侧贴覆在金属基板一侧上，所述金属基板另一侧涂布背漆层；
保护膜层为含有抗静电剂的耐高温聚乙烯薄膜，厚度为15um；
背漆层为含有抗静电剂的环氧漆层，厚度为26um。
金属基板为镀锌钢板或冷轧钢板，厚度为300um。
PVF膜层为印刷有图案的耐高温聚氟乙烯薄膜，厚度为110um。
抗静电剂为全氟正辛烷磺酸四乙基铵盐和氟烷基三甲胺咪唑按照重量比为1:0.7组成的混合物。
所述抗静电覆膜钢板的制备方法如下：
(1)薄膜层的制备：流延成型将PE树脂薄片经过挤出机熔融塑化后，加入抗静电剂，熔体从T型模头挤出，呈片状流延至平稳旋转的光洁的冷却辊筒的辊面上，经冷却降温定型后，再经牵引、切边、测厚、后处理后卷取得PE保护膜；将PVF树脂薄片经过挤出机熔融塑化后，熔体从T型模头挤出，呈片状流延至平稳旋转的光洁的冷却辊筒的辊面上，经冷却降温定型后，再经牵引、切边、测厚、后处理后卷取得PVF膜；
(2)环氧漆层的制备：将环氧树脂、偶联剂、稳定剂、增塑剂、抗静电剂加入有机溶剂中，在35℃下搅拌混合均匀制得；
(3)金属基板前处理：清洗金属基板，除去金属基板表面附着的防锈油、锈斑和灰尘，然后烘干；
(4)覆膜：在烘箱中将金属基板加热到250℃的高温，将PE保护膜、PVF膜和金属基板送入上下覆合辊中间，使薄膜在上下辊的压力和高温的作用下与钢板贴覆在一起；
(5)涂漆：在金属基板另一侧的表面涂布一层制备好的环氧漆，进入烘箱烘干，固化，固化温度232℃，时间22s，形成背漆层。
实施例1-3所制备的抗静电覆膜钢板的电阻值为10e6Ω至10e7Ω，具有较好的抗静电性。
以上公开的本发明优选实施例只是用于帮助阐述本发明。优选实施例并没有详尽叙述所有的细节，也不限制该发明仅为所述的具体实施方式。显然，根据本说明书的内容，可作很多的修改和变化。本说明书选取并具体描述这些实施例，是为了更好地解释本发明的原理和实际应用，从而使所属技术领域技术人员能很好地理解和利用本发明。本发明仅受权利要求书及其全部范围和等效物的限制。

Claims (4)

1.一种抗静电覆膜钢板，其特征在于，包括金属基板和PVF膜层，所述PVF膜层一侧涂布保护膜层，另一侧贴覆在金属基板一侧上，所述金属基板另一侧涂布背漆层；
所述保护膜层为含有抗静电剂的耐高温聚乙烯薄膜，厚度为10-15um；
所述背漆层为含有抗静电剂的环氧漆层，厚度为20-26um；
所述抗静电覆膜钢板的制备方法如下：
(1)薄膜层的制备：流延成型将PE树脂薄片经过挤出机熔融塑化后，加入抗静电剂，熔体从T型模头挤出，呈片状流延至平稳旋转的光洁的冷却辊筒的辊面上，经冷却降温定型后，再经牵引、切边、测厚、后处理后卷取得PE保护膜；将PVF树脂薄片经过挤出机熔融塑化后，熔体从T型模头挤出，呈片状流延至平稳旋转的光洁的冷却辊筒的辊面上，经冷却降温定型后，再经牵引、切边、测厚、后处理后卷取得PVF膜；
(2)环氧漆层的制备：将环氧树脂、偶联剂、稳定剂、增塑剂、抗静电剂加入有机溶剂中，在25-35℃下搅拌混合均匀制得；
(3)金属基板前处理：清洗金属基板，除去金属基板表面附着的防锈油、锈斑和灰尘，然后烘干；
(4)覆膜：在烘箱中将金属基板加热到230-250℃的高温，将PE保护膜、PVF膜和金属基板送入上下覆合辊中间，使薄膜在上下辊的压力和高温的作用下与钢板贴覆在一起；
(5)涂漆：在金属基板另一侧的表面涂布一层制备好的环氧漆，进入烘箱烘干，固化，固化温度216-232℃，时间18-22s，形成背漆层。
2.如权利要求1所述的一种抗静电覆膜钢板，其特征在于，所述金属基板为镀锌钢板或冷轧钢板，厚度为230-300um。
3.如权利要求1所述的一种抗静电覆膜钢板，其特征在于，所述PVF膜层为印刷有图案的耐高温聚氟乙烯薄膜，厚度为85-110um。
4.如权利要求1所述的一种抗静电覆膜钢板，其特征在于，所述抗静电剂为全氟正辛烷磺酸四乙基铵盐和氟烷基三甲胺咪唑按照重量比为1:0.3-0.7组成的混合物。
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