CN112227111A - 一种高吸墨量防渗透型热升华转印纸加工工艺 - Google Patents
一种高吸墨量防渗透型热升华转印纸加工工艺 Download PDFInfo
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Abstract
本发明公开一种高吸墨量防渗透型热升华转印纸加工工艺，通过制备第一涂层胶液、第二涂层胶液，而后经干燥处理得到双层功能性结构层，最后通过常规固化加工方式形成改性的高性能热升华转印纸。通过上述方式，本发明提供一种高吸墨量防渗透型热升华转印纸加工工艺，在引入小分子新结构(E)‑N'‑(4,6‑双((((E)‑4‑羟基亚苄基)氨基)‑1,3,5‑三嗪‑2‑基)‑N,N‑二甲基甲酰胺作为热升华功能材料以增加转印纸的吸墨量的基础上，增加第二涂层的防渗透层，从而极大减缓了墨水渗透，并在转印过程中有减弱染料反向升华的作用，最终达到提高转印纸转移率的目的。
Description
技术领域
本发明涉及热升华转印纸领域，尤其涉及一种高吸墨量防渗透型热升华转印纸加工工艺。
背景技术
热升华转印是将图案通过专用热升华墨水打印到热升华转印纸上，再在加热条件下使热升华墨水升华渗入承印物上被固定，继而在承印物上形成目标图像的工艺过程。该过程无需水洗，不产生工业废水，且转印后不影响承印物触感，是一项绿色环保的新型印花工艺。随着热升华转印印花产品在市场上涉及的应用领域越来越广，人们对印花图案的精细度和色彩鲜艳的要求也不断提高。高色彩鲜艳度需使用高喷墨量进行打印，而现有的热升华转印纸受承墨量影响，在高喷墨量进行打印时，由于大量墨水渗透至纸背，因而转移率随之下降无法形成预期的鲜艳图案。
发明内容
本发明主要解决的技术问题是提供一种高吸墨量防渗透型热升华转印纸加工工艺，在引入小分子新结构(E)-N'-(4,6-双((((E)-4-羟基亚苄基)氨基)-1,3,5-三嗪-2-基)-N,N-二甲基甲酰胺作为热升华功能材料以增加转印纸的吸墨量的基础上，增加第二涂层的防渗透层，从而极大减缓了墨水渗透，并在转印过程中有减弱染料反向升华的作用，最终达到提高转印纸转移率的目的。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种高吸墨量防渗透型热升华转印纸加工工艺，包括以下步骤：
步骤一，制备第一涂层：按重量份将20-30份丁苯乳胶、10-25份苯丙乳液、25-55份羧甲基纤维素、5-15份第一成膜助剂混合制成第一胶液；
步骤二，制备第二涂层：按重量份将45-65份(E)-N’-(4,6-双((((E)-4-羟基亚苄基)氨基)-1,3,5-三嗪-2-基)-N,N-二甲基甲酰胺、15-30份填料以及20-35份第二成膜剂混合制成第二胶液；
步骤三，建立涂层结构：于克重范围为40-80克/平方米的原纸正面涂布1-5克/平方米第一胶液均匀施胶，经干燥处理形成第一涂层；于第一涂层上表面涂覆2-6克/平方米第二胶液均匀施胶，经多个烘箱烘干后形成第二涂层；
步骤四，固化加工，将步骤三所得纸张送入烘缸，收卷得到热升华转印纸。
在本发明一个较佳实施例中，所述第一成膜助剂为丙二醇甲醚、丙二醇苯醚、十二碳醇酯、二丙二醇单丙醚中的一种或几种。
在本发明一个较佳实施例中，所述第二成膜剂为羧甲基纤维素钠、松香乳液、VAE乳液、纯丙乳液、苯丙乳液、聚丙烯酸乙酯中的一种或几种。
在本发明一个较佳实施例中，所述填料为硅酸铝、胶体氧化铝、二氧化硅、胶体二氧化硅、立德粉、四水埃洛石、氢氧化镁、硫酸锌、碳酸锌中的一种或几种。
在本发明一个较佳实施例中，所述(E)-N’-(4,6-双((((E)-4-羟基亚苄基)氨基)-1,3,5-三嗪-2-基)-N,N-二甲基甲酰胺的化学结构式为
本发明的有益效果是：本发明提供的一种高吸墨量防渗透型热升华转印纸加工工艺，在引入小分子新结构(E)-N'-(4,6-双((((E)-4-羟基亚苄基)氨基)-1,3,5-三嗪-2-基)-N,N-二甲基甲酰胺作为热升华功能材料以增加转印纸的吸墨量的基础上，增加第二涂层的防渗透层，从而极大减缓了墨水渗透，并在转印过程中有减弱染料反向升华的作用，最终达到提高转印纸转移率的目的。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1是本发明一种高吸墨量防渗透型热升华转印纸加工工艺的一较佳实施例的实验数据对照图；
图2是本发明一种高吸墨量防渗透型热升华转印纸加工工艺的一较佳实施例的实验数据对照图；
图3是本发明一种高吸墨量防渗透型热升华转印纸加工工艺的一较佳实施例的实验数据对照图；
图4是本发明一种高吸墨量防渗透型热升华转印纸加工工艺的一较佳实施例的实验数据对照图。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，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做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。
如图1-4所示，本发明实施例包括：
一种高吸墨量防渗透型热升华转印纸加工工艺，包括以下步骤：
步骤一，制备第一涂层：按重量份将30份丁苯乳胶、17份苯丙乳液、25份羧甲基纤维素、12份第一成膜助剂混合制成第一胶液；
步骤二，制备第二涂层：按重量份将58份(E)-N’-(4,6-双((((E)-4-羟基亚苄基)氨基)-1,3,5-三嗪-2-基)-N,N-二甲基甲酰胺、19份填料以及26份第二成膜剂混合制成第二胶液；
步骤三，建立涂层结构：于克重为50克/平方米的原纸正面涂布6克/平方米第一胶液均匀施胶，经干燥处理形成第一涂层；于第一涂层上表面涂覆6克/平方米第二胶液均匀施胶，经多个烘箱烘干后形成第二涂层；
步骤四，固化加工，将步骤三所得纸张送入烘缸，收卷得到热升华转印纸。
其中，所述第一成膜助剂为丙二醇甲醚、丙二醇苯醚、十二碳醇酯、二丙二醇单丙醚中的一种或几种。
进一步的，所述第二成膜剂为羧甲基纤维素钠、松香乳液、VAE乳液、纯丙乳液、苯丙乳液、聚丙烯酸乙酯中的一种或几种。
进一步的，所述填料为硅酸铝、胶体氧化铝、二氧化硅、胶体二氧化硅、立德粉、四水埃洛石、氢氧化镁、硫酸锌、碳酸锌中的一种或几种。
进一步的，所述(E)-N’-(4,6-双((((E)-4-羟基亚苄基)氨基)-1,3,5-三嗪-2-基)-N,N-二甲基甲酰胺的化学结构式为
本发明的发明目的是：热升华转印纸转印形成高精细度、高鲜艳度的图案，转印纸表面的热升华涂层需具备以下条件：1.涂层材料对墨水作用迅速，减弱墨水在涂层中的扩散。2.涂层具备高吸墨量，能将墨水固定在涂层中，减缓墨水的下渗现象。3.具有高转移率，同时减少墨水的反向升华，使尽可能多的墨水升华至承印物。目前市场上的热升华转印纸在进行高喷墨量打印时，墨水在吸收和升华时扩散较明显，使图案颜色边界处清晰度较差，降低了图案的精细度。同时，市场上的热升华转印纸表面涂层吸墨量无法与高喷墨量打印相匹配，较多墨水下渗至纤维层，转印过程中，被纸纤维层固定的墨水无法升华，同时固定在热升华涂层中的墨水反向渗透，使实际转移到承印物上的染料较少，无法形成高精细度、高鲜艳度的图案。
为了解决上述问题，本发明第二涂层选择小分子材料(E)-N’-(4,6-双((((E)-4-羟基亚苄基)氨基)-1,3,5-三嗪-2-基)-N,N-二甲基甲酰胺的表征谱图为主要热升华功能性材料，该材料是一种新型高效热升华功能性材料，该分子内部有较长的共轭链，共轭范围广，作用力大，且分子结构中具有较多的活性位点，可高性能的与多个染料分子作用，有利于大幅提升转印纸的吸墨量。且该材料在转印过程中可对染料进行高效释放，可有效提升涂层热升华功能性。
本发明第一涂层为高密度的防渗透薄膜。该涂层所用材料对对水性溶液有良好的阻挡作用，可有效减弱高喷墨量打印中墨水下渗至纤维层的现象。在转印过程中，第一涂层的存在也为染料分子的反向升华加以阻力，可有效减弱染料的反向渗透，促进染料正向升华至承印物。
以下通过性能对比的方式对本发明的热升华转印纸的功能特性进行了实验：
针对渗透性的测试实验：
于相同原纸上仅涂覆第二涂层所生产的转印纸作为参照物。两种转印纸在温度为25℃，湿度为55％的室内环境下，选择喷墨量分别为100％、200％、300％、400％打印混合黑色。80℃条件下干燥2分钟。以纸张空白区域为标准色，使用3nh厂家的NR10QC型色差仪测量转印纸正反面色差，纸张的渗透性能可用公式α＝C反/C正表示，α越小，表示纸张的防渗透性能越好。本发明新型热升华转印纸与仅涂覆第二涂层所生产的转印纸渗透性能数据对比如图1所示。实验结果显示，相对于单层涂层转印纸而言，增加第一涂层即防渗透层的本发明新型转印纸打印后墨水的渗透现象降低。
选择聚酯纤维面料为承印物，将上述打印色块于220℃条件下热压30s进行转印。使用色差仪测量转印纸在转印前后色差并根据公式ηc1＝(C0-C1)/C0计算四色转移率，数据对比如图2所示。实验数据显示，增加第一涂层即防渗透层的本发明新型转印纸转移率较单层涂层转印纸转移率有一定程度的提升。这是由于增加第一涂层后，打印时墨水渗透情况有所减弱，且在转印过程中，第一涂层可有效减少染料的反向升华。
本实施例还针对转移率进行了测试对比：
在温度为25℃，湿度为55％的室内环境下，选择喷墨量分别为100％、200％、300％、400％分别打印混合红色和混合黑色。100℃条件下干燥2分钟，选择聚酯纤维面料为承印物，于220℃条件下热压30s进行转印。使用3nh厂家的NR10QC型色差仪测量转印纸在转印前后色差并根据公式ηc1＝(C0-C1)/C0计算各色转移率，转移情况如图3所示。
选择市场上以纤维素类高分子为涂层主要材料的转印纸作为参照物，在相同条件下进行对比实验，转移情况如图4所示。实验数据显示，本发明新型转印纸相较于市场上以纤维素类高分子材料为涂层主要材料的转印纸，两色转移率均有一定程度的提升。当低喷墨量打印时(100％、200％)，本发明新型转印纸相较于市场上以纤维素类高分子材料为涂层主要材料的转印纸转移率没有太明显的差距，微弱的差距主要是由于本发明新型转印纸增加第一涂层即防渗透层减弱了染料的反向升华造成的。而在高喷墨量(300％、400％)打印时，本发明新型转印纸相较于市场上以纤维素类高分子材料为涂层主要材料的转印纸转移率有了较大差距，这是由于本发明新型选择新型小分子材料(E)-N'-(4,6-双((((E)-4-羟基亚苄基)氨基)-1,3,5-三嗪-2-基)-N,N-二甲基甲酰胺作为主要热升华功能性材料，该材料可对染料微粒进行迅速所用并固定，因此渗入基纸内的染料微粒大幅降低。而高分子材料为主的涂层则使对墨水整体吸收，当吸收量饱和时，大量染料微粒随水分一同渗入基纸，造成转移率大幅降低。
综上所述，本发明提供了一种高吸墨量防渗透型热升华转印纸加工工艺，在引入小分子新结构(E)-N'-(4,6-双((((E)-4-羟基亚苄基)氨基)-1,3,5-三嗪-2-基)-N,N-二甲基甲酰胺作为热升华功能材料以增加转印纸的吸墨量的基础上，增加第二涂层的防渗透层，从而极大减缓了墨水渗透，最终达到提高转印纸转移率的目的。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书内容所作的等效结构或等效流程变换，或直接或间接运用在其它相关的技术领域，均同理包括在本发明的专利保护范围内。
Claims (5)
1.一种高吸墨量防渗透型热升华转印纸加工工艺，其特征在于，包括以下步骤：
步骤一，制备第一涂层：按重量份将20-30份丁苯乳胶、10-25份苯丙乳液、25-55份羧甲基纤维素、5-15份第一成膜助剂混合制成第一胶液；
步骤二，制备第二涂层：按重量份将45-65份(E)-N’-(4,6-双((((E)-4-羟基亚苄基)氨基)-1,3,5-三嗪-2-基)-N,N-二甲基甲酰胺、15-30份填料以及20-35份第二成膜剂混合制成第二胶液；
步骤三，建立涂层结构：于原纸正面涂布1-5克/平方米第一胶液均匀施胶，经干燥处理形成第一涂层；于第一涂层上表面涂覆2-6克/平方米第二胶液均匀施胶，经多个烘箱烘干后形成第二涂层；
步骤四，固化加工，将步骤三所得纸张送入烘缸，收卷得到热升华转印纸。
2.根据权利要求1所述的高吸墨量防渗透型热升华转印纸加工工艺，其特征在于，所述第一成膜助剂为丙二醇甲醚、丙二醇苯醚、十二碳醇酯、二丙二醇单丙醚中的一种或几种。
3.根据权利要求1所述的高吸墨量防渗透型热升华转印纸加工工艺，其特征在于，所述第二成膜剂为羧甲基纤维素钠、松香乳液、VAE乳液、纯丙乳液、苯丙乳液、聚丙烯酸乙酯中的一种或几种。
4.根据权利要求1所述的高吸墨量防渗透型热升华转印纸加工工艺，其特征在于，所述填料为硅酸铝、胶体氧化铝、二氧化硅、胶体二氧化硅、立德粉、四水埃洛石、氢氧化镁、硫酸锌、碳酸锌中的一种或几种。
5.根据权利要求1所述的高吸墨量防渗透型热升华转印纸加工工艺，其特征在于，所述(E)-N’-(4,6-双((((E)-4-羟基亚苄基)氨基)-1,3,5-三嗪-2-基)-N,N-二甲基甲酰胺的化学结构式为
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