CN110453530A - 一种热敏打印纸及其制备方法 - Google Patents
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Abstract
本发明公开了一种热敏打印纸,包括纸基1、阻热层2、发色层3及保护层4,所述纸基1上部设置阻热层2,所述阻热层2上部设置发色层3,所述发色层3上部设置保护层4;所述发色层3中的重要发色物质为热升华分散染料,所述热升华分散染料可以是水性的也可以是油性的。所述的发色层3的成份主要有胶水、热升华分散染料、荧光颜料、活性分散剂及稀释剂。本发明为一种物理反应的热敏打印纸,通过打印头对热敏打印纸进行加热,热敏打印纸中的热升华分散染料在打印头发热点的高温下发生热升华,使热敏打印纸进行显像;这种物理反应的热敏打印纸生产成本低廉,生产工艺简单,而且由于热升华分散染料的材料特性,耐晒性非常好,解决了传统热敏纸不抗紫外线的问题,意义重大。
Description
技术领域
本发明涉及热敏打印纸领域,具体为一种热敏打印纸及其制备方法。
背景技术
目前市场现有的热敏打印纸均为化学反应,即:打印机接收到打印命令后,使热敏纸纸面接触打印头,打印头的热量快速传递给热敏纸,使其迅速升温,薄膜融化使热敏涂层发生化学反应,促使无色染料苯酚类或其他酸性物质混合起显色反应。
现有的热敏打印纸一般分为三层,第一层为纸基,第二层为阻热涂层,第三层为热敏涂层,主要影响其质量的为热敏涂层;好一些的热敏打印纸分为四层,第一层为纸基,第二层为阻热涂层,第三层为热敏涂层,第四层为保护层;以上类型热敏纸的主要缺点表现为耐晒性极差,户外条件下使用,极短的时间内就会出现褪色现象乃至字迹完全不显色的问题。品质较高的热敏纸一般都会在第三层或者第四层加入抗紫外线物质,虽然对纸张的耐晒性起到了一定作用,但实验证明:在稍长时间(一周)阳光的照射下还是会出现严重褪色及字迹消失的问题。另外,热敏纸抗紫外线物质价格昂贵,很大程度上增加了热敏纸的制造成本和客户使用成本。
发明内容
本发明提供了一种热敏打印纸及其制备方法,以解决现有技术不足。
本发明为实现上述目的,通过以下技术方案实现:
一种热敏打印纸,包括纸基、阻热层、发色层及保护层,所述纸基上部设置阻热层,所述阻热层上部设置发色层,所述发色层上部设置保护层,所述发色层中的发色物质为热升华分散染料。
本发明所述发色层中的热升华分散染料为水性热升华分散染料或者油性热升华分散染料。
本发明所述带有水性热升华分散染料的发色层还包括有水溶性胶水、可分散于水的荧光颜料、水性活性分散剂及水。
本发明所述带有油性热升华分散染料的发色层还包括油性胶水、可分散于溶剂的荧光颜料、油性活性分散剂及溶剂。
本发明所述带有水性热升华分散染料的发色层组份按重量百分比计为:
组份 | 重量百分比 |
水溶性胶水 | 20%-90% |
水性热升华分散染料 | 0.5%-30% |
可分散于水的荧光颜料 | 0.5%-30% |
水性活性分散剂 | 0.01%-10% |
水 | 20%-70% |
本发明所述带有油性热升华分散染料的发色层组份按重量百分比计为:
组份 | 重量百分比 |
油性胶水 | 25%-90% |
油性热升华分散染料 | 0.5%-30% |
可分散于溶剂的荧光颜料 | 0.5%-30% |
油性活性分散剂 | 0.01%-10% |
溶剂 | 20%-70% |
本发明所述的发色层的涂布量为1-15g/m2。
本发明所述阻热层为水溶性胶水、高岭土、聚乙烯醇分散剂及水混合制成的阻热涂层,涂布量为1-12g/m2;所述保护层为水、聚四氟乳液、硅溶液及蜡混合制成的保护涂层,涂布量为1-10g/m2。
一种热敏打印纸的制备方法,包括以下步骤:
①制备阻热剂:将水溶性胶水与水混合稀释后,添加入的高岭土及聚乙烯醇分散剂,制成具有阻热效果的混合液,在常温条件下使用分散机对混合液进行1-2小时的分散搅拌,使高岭土在胶水中达到均匀悬浮的状态;
②将步骤①制备好的阻热剂均匀涂布在基纸上,阻热剂干燥后形成阻热层;
③制备发色剂:按照重量百分比计将水溶性胶水20%-90%、水性热升华分散染料0.5%-30%、可分散于水的荧光颜料0.5%-30%、水性活性分散剂0.01%-10%及水20%-70%或油性胶水25%-90%、油性热升华分散染料0.5%-30%、可分散于溶剂的荧光颜料0.5%-30%、油性活性分散剂0.01%-10%及溶剂20%-70%混合后使用分散机对混合液进行0.5-1小时的分散搅拌,分散后的发色剂再进行研磨加工,研磨后的发色剂细度为0.3-50μm;
④将步骤③制备好的发色剂均匀的涂布在阻热层上,发色剂干燥后形成发色层3;
⑤制备保护剂:将水、聚四氟乳液、硅溶液及蜡混合后使用分散机进行1-2小时的分散搅拌,使其各种组分分散均匀,制得保护剂;
⑥将步骤⑤制得的保护剂均匀涂布在发色层上,保护剂干燥后形成保护层。
本发明所述涂布方式为刮刀式涂布、四辊转移式涂布、五辊转移式涂布、狭缝式涂布、网纹辊式涂布及印刷式涂布的任一种涂布方式。
本发明的优点在于:
本发明为一种物理反应的热敏打印纸,通过打印头对热敏打印纸进行加热,热敏打印纸中的热升华分散染料加打印头的高温下进行热升华,使热敏打印纸进行显像;这种物理反应的热敏打印纸生产成本低廉,生产工艺简单,而且由于分散染料的材料特性,耐晒性非常好。
附图说明
图1为本发明的结构示意图。
附图标记:1-纸基、2-阻热层、3-发色层、4-保护层。
具体实施方式
本实施例具体公开的一种热敏打印纸,包括纸基1、阻热层2、发色层3及保护层4,所述纸基1上部设置阻热层2,所述阻热层2上部设置发色层3,所述发色层3上部设置保护层4,所述发色层3中的发色物质为热升华分散染料。所述发色层3中的热升华分散染料为水性热升华分散染料或者油性热升华分散染料。所述带有水性热升华分散染料的发色层3还包括有水溶性胶水、可分散于水的荧光颜料、水性活性分散剂及水。所述带有油性热升华分散染料的发色层3还包括油性胶水、可分散于溶剂的荧光颜料、油性活性分散剂及溶剂。本发明为一种物理反应的热敏打印纸,通过打印头对热敏打印纸进行加热,热敏打印纸中的热升华分散染料在打印头的高温作用下发生热升华,使热敏打印纸显像;这种物理反应的热敏打印纸生产成本低廉,生产工艺简单,而且由于分散染料的材料特性,耐晒性非常好。
本发明所述带有水性热升华分散染料的发色层3组份按重量百分比计为:
组份 | 重量百分比 |
水溶性胶水 | 20%-90% |
水性热升华分散染料 | 0.5%-30% |
可分散于水的荧光颜料 | 0.5%-30% |
水性活性分散剂 | 0.01%-10% |
水 | 20%-70% |
本发明所述带有油性热升华分散染料的发色层3组份按重量百分比计为:
本发明进一步方案是:所述发色层3的涂布量为1-15g/m2。
本发明更进一步的方案是:所述阻热层2为水溶性胶水、高岭土、聚乙烯醇分散剂及水混合制成的阻热涂层,涂布量为1-12g/m2。阻热层的组分配比及涂布量可以使阻热层2的阻热达到较好效果。所述保护层4为水、聚四氟乳液、硅溶液及蜡混合制成的保护涂层,涂布量为1-10g/m2。保护层4的组分配比及涂布量可以使保护层4的保护达到较好效果,使热敏打印纸表面光滑,平整度高,并具有较好的耐水性。
一种热敏打印纸的制备方法,包括以下步骤:
①制备阻热剂:将水溶性胶水与水混合稀释后,添加入的高岭土及聚乙烯醇分散剂,制成具有阻热效果的混合液,在常温条件下使用分散机对混合液进行1-2小时的分散搅拌,使高岭土在胶水中达到均匀悬浮的状态;
②将步骤①制备好的阻热剂均匀涂布在基纸1上,阻热剂干燥后形成阻热层2;
③制备发色剂:按照重量百分比计将水溶性胶水20%-90%、水性热升华分散染料0.5%-30%、可分散于水的荧光颜料0.5%-30%、水性活性分散剂0.01%-10%及水20%-70%或油性胶水25%-90%、油性热升华分散染料0.5%-30%、可分散于溶剂的荧光颜料0.5%-30%、油性活性分散剂0.01%-10%及溶剂20%-70%混合后使用分散机对混合液进行0.5-1小时的分散搅拌,分散后的发色剂再进行研磨加工,研磨后的发色剂细度为0.3-50μm;
④将步骤③制备好的发色剂均匀的涂布在阻热层2上,发色剂干燥后形成发色层3;
⑤制备保护剂:将水、聚四氟乳液、硅溶液及蜡混合后使用分散机进行1-2小时的分散搅拌,使其各种组分分散均匀,制得保护剂;
⑥将步骤⑤制得的保护剂均匀涂布在发色层3上,保护剂干燥后形成保护层4。
本方法制备的热敏打印纸生产成本低廉,并具有非常好的耐晒性,热敏打印纸表面光滑,平整度高,并具有较好的耐水性。同时本方法还具有生产工艺简单,易操作的优点。
本发明所述涂布方式为刮刀式涂布、四辊转移式涂布、五辊转移式涂布、狭缝式涂布、网纹辊式涂布及印刷式涂布的任一种涂布方式。
以下通过具体实施例对本发明进一步说明:
实施例一
带有水性热升华分散染料的发色层3成份按重量百分比计为:
组份 | 重量百分比 |
水溶性胶水 | 60% |
水性热升华分散染料 | 15% |
可分散于水的荧光颜料 | 10% |
水性活性分散剂 | 5% |
水 | 10% |
发色层3按照6.5g/m2的涂布量进行涂布。
夏季户外阳光直射耐晒性能测试:
光照时间 | 褪色情况 | 变色情况 | 粉化情况 |
5h-10h | 无褪色 | 无变色 | 无粉化 |
11h-20h | 无褪色 | 无变色 | 无粉化 |
21h-40h | 无褪色 | 无变色 | 无粉化 |
41h-60h | 无褪色 | 无变色 | 无粉化 |
61h-100h | 无褪色 | 无变色 | 无粉化 |
101h-300h | 轻微褪色 | 轻微变色 | 无粉化 |
经过300个小时的户外阳光直射耐晒性能测试后的热敏打印纸与色卡进行对比,达到了7级耐晒效果。
实施例二
带有水性热升华分散染料的发色层3成份按重量百分比计为:
组份 | 重量百分比 |
水溶性胶水 | 40% |
水性热升华分散染料 | 4.2% |
可分散于水的荧光颜料 | 15% |
水性活性分散剂 | 5% |
水 | 35.8% |
发色层3按照4.5g/m2的涂布量进行涂布。
夏季户外阳光直射耐晒性能测试:
光照时间 | 褪色情况 | 变色情况 | 粉化情况 |
5h-10h | 无褪色 | 无变色 | 无粉化 |
11h-20h | 无褪色 | 无变色 | 无粉化 |
21h-40h | 无褪色 | 无变色 | 无粉化 |
41h-60h | 无褪色 | 无变色 | 无粉化 |
61h-100h | 无褪色 | 轻微变色 | 无粉化 |
101h-300h | 轻微褪色 | 轻微变色 | 无粉化 |
经过300个小时的户外阳光直射耐晒性能测试后的热敏打印纸与色卡进行对比,达到了6级耐晒效果。
实施例三
带有水性热升华分散染料的发色层3成份按重量百分比计为:
发色层3按照4.5g/m2的涂布量进行涂布。
夏季户外阳光直射耐晒性能测试:
光照时间 | 褪色情况 | 变色情况 | 粉化情况 |
5h-10h | 无褪色 | 无变色 | 无粉化 |
11h-20h | 无褪色 | 无变色 | 无粉化 |
21h-40h | 无褪色 | 无变色 | 无粉化 |
41h-60h | 无褪色 | 无变色 | 无粉化 |
61h-100h | 无褪色 | 无变色 | 无粉化 |
101h-300h | 轻微褪色 | 轻微变色 | 无粉化 |
经过300个小时的户外阳光直射耐晒性能测试后的热敏打印纸与色卡进行对比,达到了7级耐晒效果。
实施例四
带有油性热升华分散染料的发色层3成份按重量百分比计为:
组份 | 重量百分比 |
油性胶水 | 50% |
油性热升华分散染料 | 10% |
可分散于溶剂的荧光颜料 | 15% |
油性活性分散剂 | 3% |
溶剂 | 22% |
发色层3按照4.0g/m2的涂布量进行涂布。
夏季户外阳光直射耐晒性能测试:
光照时间 | 褪色情况 | 变色情况 | 粉化情况 |
5h-10h | 无褪色 | 无变色 | 无粉化 |
11h-20h | 无褪色 | 无变色 | 无粉化 |
21h-40h | 无褪色 | 无变色 | 无粉化 |
41h-60h | 无褪色 | 无变色 | 无粉化 |
61h-100h | 无褪色 | 无变色 | 无粉化 |
101h-300h | 无褪色 | 无变色 | 无粉化 |
经过300个小时的户外阳光直射耐晒性能测试后的热敏打印纸与色卡进行对比,达到了8级耐晒效果。
实施例五
带有油性热升华分散染料的发色层3成份按重量百分比计为:
组份 | 重量百分比 |
油性胶水 | 50% |
油性热升华分散染料 | 8% |
可分散于溶剂的荧光颜料 | 20% |
油性活性分散剂 | 5% |
溶剂 | 17% |
发色层3按照4.5g/m2的涂布量进行涂布。
夏季户外阳光直射耐晒性能测试:
经过300个小时的户外阳光直射耐晒性能测试后的热敏打印纸与色卡进行对比,达到了8级耐晒效果。
现有的热敏打印纸一般在5h-10h的阳光直射条件下会发生严重的褪色及变色,甚至出现字迹和图案完全消失的情况。即便是设置有防紫外线层的热敏打印纸,在经过11h-20h阳光直射后,也会出现比较严重的褪色及变色情况。
本发明通过改变原有热敏打印纸发色层反应方式,即:利用热升华分散染料遇热升华变色的特性,将原热敏打印纸显像原理由化学反应改变为物理反应。本发明发色层显像方式的改变较原有技术有以下进步:一是本发明热敏打印纸生产成本低廉,生产工艺简单,极大的降低了生产成本,二是由于本发明发色层组分中热升华分散染料的材料特性,解决了传统热敏纸不抗紫外线的问题,耐晒性非常好,意义重大。
为验证本发明耐晒性效果,通过调整水性、油性热升华分散染料组分,结合五次实施例效果,得出如下结论:经夏季户外阳光直射耐晒性能测试,本发明纸张耐晒性牢度较好。发色层3使用水性热升华分散染料热敏纸耐晒性强于普通热敏纸,而油性热升华分散染料热敏纸耐晒性更优。使用本发明可极大地提高热敏打印纸耐晒性。
以上结合附图及实施例对本发明的具体实施方式作了说明,但这些说明不能被理解为限制了本发明的范围,本发明未详尽描述的技术内容均为公知技术。
Claims (10)
1.一种热敏打印纸,其特征在于:包括纸基(1)、阻热层(2)、发色层(3)及保护层(4),所述纸基(1)上部设置阻热层(2),所述阻热层(2)上部设置发色层(3),所述发色层(3)上部设置保护层(4),所述发色层(3)中的发色物质为热升华分散染料。
2.根据权利要求1所述的一种热敏打印纸,其特征在于:所述发色层(3)中的热升华分散染料为水性热升华分散染料或者油性热升华分散染料。
3.根据权利要求1所述的一种热敏打印纸,其特征在于:所述带有水性热升华分散染料的发色层(3)还包括有水溶性胶水、可分散于水的荧光颜料、水性活性分散剂及水。
4.根据权利要求1所述的一种热敏打印纸,其特征在于:所述带有油性热升华分散染料的发色层(3)还包括油性胶水、可分散于溶剂的荧光颜料、油性活性分散剂及溶剂。
5.根据权利要求3所述的一种热敏打印纸,其特征在于:所述发色层(3)组份按重量百分比计为:
6.根据权利要求4所述的一种热敏打印纸,其特征在于:所述发色层(3)组份按重量百分比计为:
7.根据权利要求1所述的一种热敏打印纸,其特征在于:所述的发色层(3)的涂布量为1-15g/m2。
8.根据权利要求1所述的一种热敏打印纸,其特征在于:所述阻热层(2)为水溶性胶水、高岭土、聚乙烯醇分散剂及水混合制成的阻热涂层,涂布量为1-12g/m2;所述保护层(4)为水、聚四氟乳液、硅溶液及蜡混合制成的保护涂层,涂布量为1-10g/m2。
9.一种热敏打印纸的制备方法,其特征在于:包括以下步骤:
①制备阻热剂:将水溶性胶水与水混合稀释后,添加入的高岭土及聚乙烯醇分散剂,制成具有阻热效果的混合液,在常温条件下使用分散机对混合液进行1-2小时的分散搅拌,使高岭土在胶水中达到均匀悬浮的状态;
②将步骤①制备好的阻热剂均匀涂布在基纸(1)上,阻热剂干燥后形成阻热层2;
③制备发色剂:按照重量百分比计将水溶性胶水20%-90%、水性热升华分散染料0.5%-30%、可分散于水的荧光颜料0.5%-30%、水性活性分散剂0.01%-10%及水20%-70%或油性胶水25%-90%、油性热升华分散染料0.5%-30%、可分散于溶剂的荧光颜料0.5%-30%、油性活性分散剂0.01%-10%及溶剂20%-70%混合后使用分散机对混合液进行0.5-1小时的分散搅拌,分散后的发色剂再进行研磨加工,研磨后的发色剂细度为0.3-50μm;
④将步骤③制备好的发色剂均匀的涂布在阻热层(2)上,发色剂干燥后形成发色层3;
⑤制备保护剂:将水、聚四氟乳液、硅溶液及蜡混合后使用分散机进行1-2小时的分散搅拌,使其各种组分分散均匀,制得保护剂;
⑥将步骤⑤制得的保护剂均匀涂布在发色层(3)上,保护剂干燥后形成保护层4。
10.根据权利要求7所述的一种热敏打印纸的制备方法,其特征在于:所述涂布方式为刮刀式涂布、四辊转移式涂布、五辊转移式涂布、狭缝式涂布、网纹辊式涂布及印刷式涂布的任一种涂布方式。
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Application publication date: 20191115 |