CN106758513A - 无涂层喷墨热升华转印纸及其制备方法 - Google Patents
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Abstract
本发明公开了一种无涂层喷墨热升华转印纸，具有纸纤维，所述纸纤维上包裹有施胶剂。本发明还公开了无涂层喷墨热升华转印纸的制备方法，包括以下步骤：备施胶剂；将热施胶剂泵入施胶机，该施胶机内预存有热的原纸，该热的原纸的温度为70‑95℃，该施胶机采用热施胶剂对热的原纸进行施胶，使得热施胶剂渗入到原纸的纸基内并湿润包裹在原纸内的纸纤维及填料表面形成施胶原纸；对施胶原纸进行烘干、压平后即可得到纸面平整无翘曲的无涂层喷墨热升华转印纸。本发明的优点是：转印纸的综合性能较佳。
Description
技术领域
本发明涉及纺织品数码印花技术领域，尤其是涉及一种无涂层喷墨热升华转印纸。本发明还涉及该无涂层喷墨热升华转印纸的制备方法。
背景技术
随着社会发展与经济的进步，对环境保护的要求越来越高。纺织品印花作为一个高污染行业，其污水排放量可占总污水排放量的35%。喷墨热升华转移印花是一种无水的绿色印花工艺，它将需要印刷的图文喷墨打印在转印纸上，然后将打印好的转印纸与被转印的面料贴合加热，使转印纸表面的染料受热升华到面料纤维内实现染色。这个印花过程无需用水并能得到精致靓丽的图案，故而正在快速发展和取代传统印染工艺。
比如，授权公告号为1315906的中国发明专利：一种有涂层转印纸，提供了适合用于喷墨印刷的转印纸，其至少在待印刷的一面上具有隔离层或阻挡层，且该等涂层具有最多为100毫升/分钟的孔隙度，且还提供了一种制备所述转印纸的方法和用喷墨印刷机由可升华油墨的水分散体印刷所述转印纸的方法。授权公告号为 102248831 的中国发明专利：一种多用途服饰面料数码印花纸的制备和使用方法，提供的多用途服饰面料数码印花纸由基材和功能性涂层组成，可通过转印法或直喷法使用，使用该多用途服饰面料数码印花纸，可以对天然纤维面料和混纺面料进行染色，具有优良的色牢度和低廉的固色成本。成品能够保留较佳的手感、透气性和舒适性。公开号为102448731的中国发明专利申请，公开了一种喷墨印刷用转印纸的制备方法，此类喷墨转印纸均需在原纸表面涂布功能涂层以实现阻挡墨水中的染料渗入纸基才能保证在转移印花时染料受热升华并对被转印的面料纤维染色。但是有涂层的喷墨转印纸在环境湿度变化时容易产生纸张翘曲等不平整现象致使打印过程中擦到喷头，在热转印过程中纸面不平整还会使面料与转印纸错位造成面料的印花疵，因而翘曲变形是评价转印纸品质的一个重要因数。
为了平整易用，业界有人直接使用未涂布的转印纸原纸当转印纸使用，但没有涂层的原纸孔隙度超过100毫升/分钟，墨水中的染料会大量渗入原纸内部，使得墨水消耗大增且打印清晰度变差、晕色、染料驻留在纸张纤维内不能升华逸出而致使被转印面料得色量不够。
发明内容
本发明的目的是提供一种无涂层喷墨热升华转印纸。它具有综合性能较佳的特点。本发明还公开了该无涂层喷墨热升华转印纸的制备方法。
本发明所采用的技术方案是：
无涂层喷墨热升华转印纸，具有纸纤维，所述纸纤维上包裹有施胶剂。
无涂层喷墨热升华转印纸的制备方法，包括以下步骤：
（1）备施胶剂，该施胶剂和纸纤维具有亲和性，且将施胶剂加热至50-85℃形成热施胶剂；
（2）将热施胶剂泵入施胶机，该施胶机内预存有热的原纸，该热的原纸的温度为70-95℃，该施胶机采用热施胶剂对热的原纸进行施胶，使得热施胶剂渗入到原纸的纸基内并湿润包裹在原纸内的纸纤维及填料表面形成施胶原纸；
（3）对施胶原纸进行烘干、压平后即可得到纸面平整无翘曲的无涂层喷墨热升华转印纸。
所述步骤（1）中的施胶剂采用羧甲基纤维素、海藻酸钠、变性淀粉、聚丙烯酸、聚丙烯酸铵、琼脂、乳胶、碳酸钙、硅酸盐、铝镁钡硫酸盐、水性氟类化学品中的一种，或采用前述原料中至少两种的混合物。
所述步骤（2）中，采用施胶剂对原纸进行双面施胶。
所述步骤（3）中采用热滚筒对施胶原纸进行烘干。
所述热滚筒对施胶原纸进行烘干时，施胶原纸上下面受到的烘干温度不同。
本发明和现有技术相比所具有的优点是：综合性能较佳。即：
1、转移率较低。常用有涂层转印纸热转印前后的平均色密度差为0.3825，本发明制备的无涂层转印纸热转印前后的平均色密度差为0.3375，无涂层转印纸的转移率低于有涂层转印纸2%，实际应用时可以忽略不计。
2、干燥速度快。常用的有涂层转印纸干燥速度为4级，本发明制备的无涂层转印纸干燥速度为3级，优于有涂层转印纸。
3、翘曲度小。常用的有涂层转印纸的翘曲度为3-4级，本发明制备的无涂层转印纸的翘曲度为1级，更易于使用。
附图说明
下面结合附图和实施例对本发明进一步说明：
图1是常用有涂层转印纸的截面照片；
图2是本发明的无涂层喷墨热升华转印纸在尚未施胶时的照片；
图3是本发明的无涂层喷墨热升华转印纸在施胶后的照片。
具体实施方式
实施例
无涂层喷墨热升华转印纸的制备方法，包括以下步骤：
（1）制备施胶剂，该施胶剂和纸纤维具有亲和性，且将施胶剂加热至50-85℃形成热施胶剂。比如，将施胶剂加热至50、60、70、75、80或85°C。
该施胶剂采用羧甲基纤维素、海藻酸钠、变性淀粉、聚丙烯酸、聚丙烯酸铵、琼脂、乳胶、碳酸钙、硅酸盐、铝镁钡硫酸盐、水性氟类化学品中的一种，或采用前述原料中至少两种的混合物。当采用两种及以上原料进行混合时，添加原料的比例不限。以上原料均采用市售品。
以下为具体混合物施胶剂的制备举例：
施胶剂1
制备设备选用1吨容量的高速分散罐。先将700公斤净水泵入高速分散罐，再投入200公斤1200目的碳酸钙分散搅拌15分钟，再投入亲水的低粘聚阴离子羧甲基纤维素100公斤分散搅拌30分钟，升温至75℃并继续搅拌30分钟，经过120目筛网过滤后即得。
施胶剂2
制备设备选用1吨容量的高速分散罐。先将700公斤净水泵入高速分散罐，再投入200公斤变性淀粉分散搅拌15分钟，再投入水性氟化合物7公斤搅拌10分钟，升温至75℃并继续搅拌30分钟，经过120目筛网过滤后即得。
施胶剂3
制备设备选用1吨容量的高速分散罐。先将700公斤净水泵入高速分散罐，再投入200公斤硅酸盐分散搅拌15分钟，再投入琼脂、乳胶均7公斤搅拌10分钟，升温至75℃并继续搅拌30分钟，经过120目筛网过滤后即得。
（2）将热施胶剂泵入施胶机，该施胶机内预存有热的原纸，该热的原纸的照片如图2所示。该热的原纸的温度为70-95℃。比如，热的原纸的温度为70、75、80、85、90或95°C。该施胶机采用热施胶剂对热的原纸进行施胶，使得热施胶剂渗入到原纸的纸基内并湿润包裹在原纸内的纸纤维及填料表面形成施胶原纸，该施胶原纸的照片见图3所示。界定热施胶剂渗入到原纸的纸基内并湿润包裹在原纸内的纸纤维及填料表面的方法为：a.施胶剂已经完全渗入纸基内，在纸的表面没有明显的如图1所示的涂层，而是如图3所示施胶剂包裹纤维的状态。b.传统的有涂层喷墨热升华转印纸的涂层可以用湿水的手指触摸，能明显感觉到有一层滑腻的水溶性涂层；本发明的无涂层喷墨热升华转印纸则没有明显的滑腻涂层感觉。
（3）对施胶原纸进行烘干、压平后即可得到纸面平整无翘曲的无涂层喷墨热升华转印纸。
更优的方式是：
前述步骤（2）中，采用施胶剂对原纸进行双面施胶，步骤（3）中采用热滚筒对施胶原纸进行烘干。同时，采用热滚筒对施胶原纸进行烘干时，施胶原纸上下面受到的烘干温度不同。此时，可以得到更为平整的、不翘曲的无涂层喷墨热升华转印纸。
通过采用前述方法后，制备出无涂层喷墨热升华转印纸，其原纸具有纸纤维，纸纤维上包裹了施胶剂。
效果例
以下，根据QB/T 5052-2016标准对市售某品牌有涂层喷墨热升华转印纸和本发明实施例制备的无涂层喷墨热升华转印纸的性能进行测试和比较。
1、关于转移率：
用喷墨打印机在喷墨热升华转印纸上打印青、品、黄、黑的四元色色块，对比热升华转印前后纸面的颜色密度差来计算转移率，密度差越大则表示转移率越高。原因在于染料在受热转移时迁移到被转印面料上越多，纸面颜色残留就越少。
2、关于干燥速度：
喷墨热升华转印纸的干燥速度以1-10级表示，级数越小干燥速度越快。
3、关于翘曲度：
将250mmX250mm的喷墨热升华转印纸放在湿度为20%、温度为40℃的环境试验箱里半小时，观察其翘曲程度，纸边翘起高度小于5毫米的为1级；翘起高度小于1厘米的为2级；翘起高度小于2厘米的为3级；翘起高度小于3厘米的为4级；纸边卷起的为5级。翘曲度越小越平整。需要说明的是，翘曲度的检测采用常用方法，不在QB/T 5052-2016标准内。
测试结果分别见表一和表二：
表一 有涂层转印纸性能表
表二 无涂层转印纸性能表
由以上表一和表二可以看出：
1、转移率：有涂层转印纸热转印前后的平均色密度差为0.3825，无涂层转印纸热转印前后的平均色密度差为0.3375。无涂层转印纸的转移率低于有涂层转印纸2%，实际应用时可以忽略不计。即，有涂层转印纸和本发明的无涂层喷墨热升华转印纸转移率相当。
2、干燥速度：有涂层转印纸干燥速度为4级，无涂层转印纸干燥速度为3级。无涂层转印纸优于有涂层转印纸。即，本发明的无涂层喷墨热升华转印纸的干燥速度相对于有涂层转印纸较快。
3、翘曲度：有涂层转印纸的翘曲度为3-4级，无涂层转印纸的翘曲度为1级。无涂层转印纸更为优秀。即，本发明的无涂层喷墨热升华转印纸的翘曲度相对于有涂层转印纸较小。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图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他相关的技术领域，均同理包括在本发明的专利保护范围内。
Claims (6)
1.无涂层喷墨热升华转印纸，具有纸纤维，其特征在于：所述纸纤维上包裹有施胶剂。
2.无涂层喷墨热升华转印纸的制备方法，包括以下步骤：
（1）备施胶剂，该施胶剂和纸纤维具有亲和性，且将施胶剂加热至50-85℃形成热施胶剂；
（2）将热施胶剂泵入施胶机，该施胶机内预存有热的原纸，该热的原纸的温度为70-95℃，该施胶机采用热施胶剂对热的原纸进行施胶，使得热施胶剂渗入到原纸的纸基内并湿润包裹在原纸内的纸纤维及填料表面形成施胶原纸；
（3）对施胶原纸进行烘干、压平后即可得到纸面平整无翘曲的无涂层喷墨热升华转印纸。
3.根据权利要求1所述的无涂层喷墨热升华转印纸的制备方法，其特征在于：所述步骤（1）中的施胶剂采用羧甲基纤维素、海藻酸钠、变性淀粉、聚丙烯酸、聚丙烯酸铵、琼脂、乳胶、碳酸钙、硅酸盐、铝镁钡硫酸盐、水性氟类化学品中的一种，或采用前述原料中至少两种的混合物。
4.根据权利要求1所述的无涂层喷墨热升华转印纸的制备方法，其特征在于：所述步骤（2）中，采用施胶剂对原纸进行双面施胶。
5.根据权利要求3所述的无涂层喷墨热升华转印纸的制备方法，其特征在于：所述步骤（3）中采用热滚筒对施胶原纸进行烘干。
6.根据权利要求4所述的无涂层喷墨热升华转印纸的制备方法，其特征在于：所述热滚筒对施胶原纸进行烘干时，施胶原纸上下面受到的烘干温度不同。
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