CN106111496A - 一种3d触感仿不锈钢拉丝膜及其制备方法 - Google Patents
一种3d触感仿不锈钢拉丝膜及其制备方法 Download PDFInfo
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Abstract
本发明属于不锈钢拉丝膜技术领域，具体涉及一种3D触感仿不锈钢拉丝膜及其制备方法，所述方法为：(Ⅰ)取PET薄膜，所述PET薄膜构成薄膜层，在薄膜层的一面涂布底涂剂，形成附着力促进层；(Ⅱ)在附着力促进层表面采用具有拉丝纹路的模具辊涂布UV胶水，得拉丝层；(Ⅲ)在薄膜层的另一面涂布镀铝底涂剂，得镀铝底涂层；(Ⅳ)在镀铝底涂层上进行真空镀铝，得镀铝层；(Ⅴ)在镀铝层的表面涂布面涂剂，形成封底层。本发明采用全新的UV转印技术制备拉丝PET薄膜，经镀铝、封底等工艺步骤制备了具有精细纹理和3D触感的仿不锈钢拉丝膜。
Description
技术领域
本发明属于不锈钢拉丝膜技术领域，具体涉及一种3D触感仿不锈钢拉丝膜及其制备方法。
背景技术
不锈钢板由于具有细腻的纹理，持久和厚重的金属光泽和质感，而且在不同的环境下都有着优异的使用性能，在高档装饰行业得到了越来越广泛的应用。例如，高档的电梯、游艇的装饰，高档家电的外观等等都在使用不锈钢板。然而，不锈钢板的价格比较昂贵，这也在一定程度上制约了不锈钢板的广泛应用。
应用仿不锈钢拉丝膜制备的彩色覆膜钢板在外观上完全可以替代真的不锈钢板，而且其价格低廉，得到了普遍的应用。仿不锈钢拉丝膜是一种复合膜，通常采用拉丝PET薄膜在拉丝面进行真空镀铝以实现金属光泽，在非拉丝PET膜表面涂布消光硬化层，增加薄膜的耐划伤和耐化学药品性能，最后在镀铝层表面贴合PVC得到仿不锈钢拉丝膜。
现有的技术虽然可以实现仿金属拉丝的外观效果，但也存在着一定的不足。首先，很多现有技术所选用的拉丝PET薄膜都是由BOPET薄膜经物理机械拉丝法制备的，这种制备工艺得到的拉丝膜纹理不够精细，拉丝纹边缘有大量毛刺残留，对外观标准要求较高的产品无法满足。其次，由于PET薄膜本身的硬度较低，而外拉丝产品需要拉丝层具有较高的硬度，耐划伤性，物理拉丝制备的拉丝层无法达到这一要求，因此现有工艺是无法实现具有触感的外拉丝仿金属薄膜的制备的。
发明内容
本发明主要提供了一种3D触感仿不锈钢拉丝膜及其制备方法，采用全新的UV转印技术制备拉丝PET薄膜，经镀铝、封底等工艺步骤制备了具有精细纹理和3D触感的仿不锈钢拉丝膜。其技术方案如下：一种3D触感仿不锈钢拉丝膜的制备方法，包括以下步骤：
(Ⅰ)取PET薄膜，所述PET薄膜构成薄膜层，在薄膜层的一面涂布底涂剂，形成附着力促进层；
(Ⅱ)在附着力促进层表面采用具有拉丝纹路的模具辊涂布UV胶水，得拉丝层；
(Ⅲ)在薄膜层的另一面涂布镀铝底涂剂，得镀铝底涂层；
(Ⅳ)在镀铝底涂层上进行真空镀铝，得镀铝层；
(Ⅴ)在镀铝层的表面涂布面涂剂，形成封底层。
优选的，薄膜层的厚度为15-180um，透光率为80-95％，雾度为0.8-3.5％。
优选的，步骤(Ⅰ)中涂布底涂剂的具体方法为，先以40-80m/min的速度进行网纹辊涂布，并在烘箱中80-120℃烘烤5-15S，然后收卷在45-65℃温度下进行熟化处理24-72h。
优选的，步骤(Ⅰ)中所述底涂剂为光固化底涂剂和/或热固化底涂剂，底涂剂的固含量为10-30％；步骤(Ⅲ)中所述镀铝底涂剂为光固化底涂剂和/或热固化底涂剂。
优选的，所述底涂剂和镀铝底涂剂均为聚氨酯树脂和/或聚丙烯酸树脂。
优选的，拉丝层的厚度为6-15um。
优选的，镀铝层的厚度为
优选的，步骤(Ⅲ)中涂布镀铝底涂剂的速度为40-80m/min，步骤(Ⅳ)中真空镀铝的速度为150-450m/min。
优选的，步骤(Ⅴ)中封底层的厚度为2-3μm，所述面涂剂为EVA树脂和/或PES树脂。
一种3D触感仿不锈钢拉丝膜，所述拉丝膜包括设置在薄膜层一面上的附着力促进层，设置在附着力促进层上的拉丝层，设置在薄膜层另一面上的镀铝底涂层，设置在镀铝底涂层上的镀铝层及设置在镀铝层上的封底层。
采用上述3D触感仿不锈钢拉丝膜及其制备方法，本发明具有以下优点：
(1)本发明实现了带有3D触感的仿金属拉丝薄膜的制备，采用UV转印的成型工艺制备的拉丝膜纹理更加精致细腻，由于拉丝层是在表面，可以实现清晰的触感，提高了产品的整体外观品质。采用特殊的面涂剂进行封底处理，保护镀铝层，省略了PVC的使用，更加的环保，产品成本更低。本发明制备的拉丝薄膜对于拉丝的线数、拉丝长度及密度、深度等都可以实现精确的控制，使产品外观更加接近于真正的拉丝不锈钢；
(2)本发明采用全新的UV转印拉丝PET薄膜，经镀铝、封底等工艺步骤制备了具有精细纹理和3D触感的仿不锈钢拉丝膜。所制备的拉丝膜可以贴合冷轧钢板、电镀锌板、热镀锌板、镀锡钢板、铝板等制成仿不锈钢拉丝的彩色覆膜金属板，应用于建筑装饰和家电外观等领域，其性能完全满足广泛的加工和使用要求。
附图说明
图1为本发明的3D触感仿不锈钢拉丝膜的结构图。
其中：1、薄膜层，2、附着力促进层，3、拉丝层，4、镀铝底涂层，5、镀铝层，6、封底层。
具体实施方式
实施例1
(Ⅰ)选择25um厚度、1000mm宽度的PET薄膜，其透光率为92％，级别为光学级，所述PET薄膜构成薄膜层1，在薄膜层1的一面先以40m/min的速度进行网纹辊涂布聚氨酯树脂底涂剂，并在烘箱中100℃烘烤10S，然后收卷在50℃温度下进行熟化处理72h，形成附着力促进层(2)；
(Ⅱ)在附着力促进层2表面采用具有拉丝纹路的模具辊涂布UV胶水，得拉丝层3，所述UV胶水购买自安瑞森公司牌号为409的UV胶水，所制备的拉丝PET薄膜的拉丝层3厚度为9um，硬度为2H，拉丝触感明显；
(Ⅲ)在拉丝PET薄膜无拉丝面经网纹辊涂布固含量为40％的聚丙烯酸树脂镀铝底涂剂，涂布速度为80m/min，得镀铝底涂层4，镀铝底涂层4的厚度为2um；
(Ⅳ)将做过底涂的拉丝膜放入真空镀铝设备内，在镀铝底涂层4上以150m/min的速度进行真空镀铝，得镀铝层5，镀铝层5的厚度为150A±10A；
(Ⅴ)在镀铝层5的表面利用网纹辊涂布EVA树脂面涂剂，形成封底层6，实现对镀铝层5的保护，封底层6的膜厚为3um。
如图1所示，为本方法制备的3D触感仿不锈钢拉丝膜，所述拉丝膜包括设置在薄膜层1一面上的附着力促进层2，设置在附着力促进层2上的拉丝层3，设置在薄膜层1另一面上的镀铝底涂层4，设置在镀铝底涂层4上的镀铝层5及设置在镀铝层5上的封底层6。
实施例2
(Ⅰ)选择180um厚度、1000mm宽度的PET薄膜，其透光率为95％，级别为光学级，所述PET薄膜构成薄膜层1，在薄膜层1的一面先以400m/min的速度进行网纹辊涂布聚氨酯树脂底涂剂，并在烘箱中120℃烘烤5S，然后收卷在65℃温度下进行熟化处理72h，形成附着力促进层2；
(Ⅱ)在附着力促进层2表面采用具有拉丝纹路的模具辊涂布UV胶水，得拉丝层3，所述UV胶水购买自安瑞森公司牌号为409的UV胶水，所制备的拉丝PET薄膜的拉丝层3厚度为15um，硬度为2H，拉丝触感明显；
(Ⅲ)在拉丝PET薄膜无拉丝面经网纹辊涂布固含量为40％的聚氨酯树脂镀铝底涂剂，涂布速度为40m/min，得镀铝底涂层4，镀铝底涂层4的厚度为3um；
(Ⅳ)将做过底涂的拉丝膜放入真空镀铝设备内，在镀铝底涂层4上以450m/min的速度进行真空镀铝，得镀铝层5，镀铝层5的厚度为100A±10A；
(Ⅴ)在镀铝层5的表面利用网纹辊涂布EVA树脂面涂剂，形成封底层6，实现对镀铝层5的保护，封底层6的膜厚为2um。
所制备的3D触感仿不锈钢拉丝膜如图1所示。
实施例3
(Ⅰ)选择100um厚度、1000mm宽度的PET薄膜，其透光率为80％，级别为光学级，所述PET薄膜构成薄膜层1，在薄膜层1的一面先以60m/min的速度进行网纹辊涂布聚丙烯酸树脂底涂剂，并在烘箱中110℃烘烤12S，然后收卷在60℃温度下进行熟化处理60h，形成附着力促进层2；
(Ⅱ)在附着力促进层2表面采用具有拉丝纹路的模具辊涂布UV胶水，得拉丝层3，所述UV胶水购买自安瑞森公司牌号为409的UV胶水，所制备的拉丝PET薄膜的拉丝层3厚度为6um，硬度为HB，拉丝触感明显；
(Ⅲ)在拉丝PET薄膜无拉丝面经网纹辊涂布固含量为40％的聚丙烯酸树脂与聚氨酯树脂混合的镀铝底涂剂，涂布速度为50m/min，得镀铝底涂层4，镀铝底涂层4的厚度为1um；
(Ⅳ)将做过底涂的拉丝膜放入真空镀铝设备内，在镀铝底涂层4上以300m/min的速度进行真空镀铝，得镀铝层5，镀铝层5的厚度为500A±10A；
(Ⅴ)在镀铝层5的表面利用网纹辊涂布PES树脂面涂剂，形成封底层6，实现对镀铝层5的保护，封底层6的膜厚为3um。
所制备的3D触感仿不锈钢拉丝膜如图1所示。
性能测试
取实施例1-3制备完成的拉丝膜分别与钢板用聚氨酯热熔胶进行贴合成为复合钢板，然后测试复合钢板的折弯、耐冲击、杯突等性能，结果如表1所示。
表1性能测试结果
| 项目 | 实施例1 | 实施例2 | 实施例3 |
| 纹路粗糙度 | 0.3μm | 0.3μm | 0.3μm |
| 表面硬度 | 〉2H/500g | 〉2H/500g | 〉2H/500g |
| 表面耐磨 | PASS/CS-5 | PASS/CS-5 | PASS/CS-5 |
| 涂层附着 | 〉5B | 〉5B | 〉5B |
| 杯突(8mm) | 无剥离现象 | 无剥离现象 | 无剥离现象 |
| 折弯(1T) | 无剥离现象 | 无剥离现象 | 无剥离现象 |
| 耐冲击(50cm) | 无剥离现象 | 无剥离现象 | 无剥离现象 |
| 水煮(100℃/30min) | 无剥离现象 | 无剥离现象 | 无剥离现象 |
| 耐溶剂(乙醇、MEK) | PASS | PASS | PASS |
对本领域的技术人员来说，可根据以上描述的技术方案以及构思，做出其它各种相应的改变以及形变，而所有的这些改变以及形变都应该属于本发明权利要求的保护范围之内。
Claims (10)
1.一种3D触感仿不锈钢拉丝膜的制备方法，其特征在于：包括以下步骤：
(Ⅰ)取PET薄膜，所述PET薄膜构成薄膜层(1)，在薄膜层(1)的一面涂布底涂剂，形成附着力促进层(2)；
(Ⅱ)在附着力促进层(2)表面采用具有拉丝纹路的模具辊涂布UV胶水，得拉丝层(3)；
(Ⅲ)在薄膜层(1)的另一面涂布镀铝底涂剂，得镀铝底涂层(4)；
(Ⅳ)在镀铝底涂层(4)上进行真空镀铝，得镀铝层(5)；
(Ⅴ)在镀铝层(5)的表面涂布面涂剂，形成封底层(6)。
2.根据权利要求1所述的3D触感仿不锈钢拉丝膜的制备方法，其特征在于：薄膜层(1)的厚度为15-180um，透光率为80-95％，雾度为0.8-3.5％。
3.根据权利要求1所述的3D触感仿不锈钢拉丝膜的制备方法，其特征在于：步骤(Ⅰ)中涂布底涂剂的具体方法为，先以40-80m/min的速度进行网纹辊涂布，并在烘箱中80-120℃烘烤5-15S，然后收卷在45-65℃温度下进行熟化处理24-72h。
4.根据权利要求1所述的3D触感仿不锈钢拉丝膜的制备方法，其特征在于：步骤(Ⅰ)中所述底涂剂为光固化底涂剂和/或热固化底涂剂，底涂剂的固含量为10-30％；步骤(Ⅲ)中所述镀铝底涂剂为光固化底涂剂和/或热固化底涂剂。
5.根据权利要求4所述的3D触感仿不锈钢拉丝膜的制备方法，其特征在于：所述底涂剂和镀铝底涂剂均为聚氨酯树脂和/或聚丙烯酸树脂。
6.根据权利要求1所述的3D触感仿不锈钢拉丝膜的制备方法，其特征在于：拉丝层(3)的厚度为6-15um。
7.根据权利要求1所述的3D触感仿不锈钢拉丝膜的制备方法，其特征在于：镀铝层(5)的厚度为
8.根据权利要求1所述的3D触感仿不锈钢拉丝膜的制备方法，其特征在于：步骤(Ⅲ)中涂布镀铝底涂剂的速度为40-80m/min，步骤(Ⅳ)中真空镀铝的速度为150-450m/min。
9.根据权利要求1所述的3D触感仿不锈钢拉丝膜的制备方法，其特征在于：步骤(Ⅴ)中封底层(6)的厚度为2-3μm，所述面涂剂为EVA树脂和/或PES树脂。
10.一种由权利要求1-9任一项所述的方法制备的3D触感仿不锈钢拉丝膜，其特征在于：所述拉丝膜包括设置在薄膜层(1)一面上的附着力促进层(2)，设置在附着力促进层(2)上的拉丝层(3)，设置在薄膜层(1)另一面上的镀铝底涂层(4)，设置在镀铝底涂层(4)上的镀铝层(5)及设置在镀铝层(5)上的封底层(6)。
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