CN111118962B - 一种用于冷链液体包装纸及其生产工艺 - Google Patents

一种用于冷链液体包装纸及其生产工艺 Download PDF

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CN111118962B
CN111118962B CN201911413139.8A CN201911413139A CN111118962B CN 111118962 B CN111118962 B CN 111118962B CN 201911413139 A CN201911413139 A CN 201911413139A CN 111118962 B CN111118962 B CN 111118962B
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任红锐
尚庆武
王权科
李双晓
张超群
徐桂新
王玉民
周坤
张有分
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Abstract

本发明公开了一种用于冷链液体包装纸包括原纸，及设置于原纸上的抗水耐乳酸施胶料，所述原纸包括面层、衬层、芯层和底层；所述面层和底层其浆料配比为：15~30%针叶和85~70%阔叶；所述衬层和芯层其浆料配比为10~25%针叶和90~75%自制化机浆；所述抗水耐乳酸施胶层包括浆内施胶料和表面施胶料；所述包装纸其生产工艺为：通过该造纸机进行原纸生产，原纸生产时，加入浆内施胶料进行桨内施胶；完成原纸生产后，依次进行机内双面施胶和机外施胶，完成原纸生产。本发明的用于冷链液体包装纸及其生产工艺，生产出的冷链液体包装纸其纸面细腻、平滑，手感舒适和印刷图案清晰逼真，纸张厚实，整个生产过程安全、绿色和环保。

Description

一种用于冷链液体包装纸及其生产工艺
技术领域
本发明涉及一种包装纸及其生产工艺，特别涉及一种用于冷链液体包装纸及其生产工艺，属于液体包装纸技术领域。
背景技术
国内的液包纸多用于盒装酸奶，纸张一面镀锡一面印刷，镀锡层致密厚实，故对原纸抗水性、耐乳酸性要求稍低；做成盒状，对原纸挺度、耐折等指标要求较低，印刷面清晰度要求也不高，故对原纸印刷面粗糙度要求低；本发明主要用于双面淋膜杯装酸奶包装纸，尤其是在冷链包装行业，需要低温或常温储存数月之久，储存环境湿度变化较大，这对于纸张抵抗液体渗透能力有极高的要求；此外，酸奶杯较普通的一次性水杯使用时间长，杯身外表面印刷图案清晰度、逼真度要求更高，因此对纸张表面的细腻程度要求极高，反应在成纸指标上就是平滑度尽可能高，粗糙度尽可能的低；酸奶杯较一次性水杯杯口细，杯身挺硬，这对成纸松厚度、挺度要求很高；现有技术中，国内很少能够批量生产，主要依靠美国进口。
发明内容
为解决上述问题，本发明提出了一种用于冷链液体包装纸及其生产工艺，生产出的冷链液体包装纸其纸面细腻、平滑，手感舒适和印刷图案清晰逼真，纸张白度适宜，无荧光增白剂，符合国家食品卫生标准；制成纸杯后杯身挺硬、厚实，使用方便，且整个生产过程安全、绿色和环保。
本发明的用于冷链液体包装纸，包括原纸，及设置于原纸上的抗水耐乳酸施胶料，所述原纸包括面层、衬层、芯层和底层；所述面层和底层其浆料配比为：15~30%针叶和85~70%阔叶；所述衬层和芯层其浆料配比为10~25%针叶和90~75%自制化机浆；
所述抗水耐乳酸施胶层包括浆内施胶料和表面施胶料；所述浆内施胶料按照每吨原纸浆料施加10~20公斤松香胶和5~15公斤AKD；所述表面施胶料包括淋膜后与酸奶接触面胶料配料为表胶淀粉和1~6%表面施胶剂，印刷面胶料配料为15~30%胶黏剂和70~55%无机粉体；及涂布机上机外微涂胶料配料。
进一步地，所述涂布机上机外微涂胶料配料与印刷面胶料配料一致。
进一步地，所述胶黏剂为食品级高粘合强度涂布淀粉、胶乳和聚乙烯醇中的一种或多种。
进一步地，所述无机粉体包括超细轻质碳酸钙、超细重质碳酸钙、超细高岭土和超细滑石粉中的一种或多种；所述无机粉体还包括助剂。
再进一步地，所述助剂为分散剂、增稠剂、保水剂和抗水剂中的一种或多种。
进一步地，所述松香胶为阴离子松香胶、阳离子松香胶、强化松香胶等中的一种或几种。
上述冷链液体包装纸其生产工艺为：通过该造纸机进行原纸生产，原纸生产时，加入浆内施胶料进行桨内施胶；完成原纸生产后，依次进行机内双面施胶和机外施胶，完成原纸生产。
进一步地，所述机内双面施胶具体如下：
机内表面施胶时，在原纸的正反面同时施胶，一面采用酸奶接触面胶料施胶，另一面采用微涂胶料配料进行微涂施胶。
进一步地，所述机外施胶具体如下：
造纸机出来后的纸送至涂布车间，并将印刷面胶料涂覆至原纸其微涂施胶的一面。
本发明与现有技术相比较，本发明的用于冷链液体包装纸生产工艺，采用机内双元施胶工艺，同时满足液包纸持续抗水、耐乳酸的双重要求；并采用机内微涂与机外整饰涂布相结合的涂布方式，最大限度提高成纸印刷面光滑细腻程度，此外涂层既可快速吸收印刷油墨，还能有效阻止油墨往纤维内部的迁移，提高印刷图案的色泽与鲜艳度；优选高品质商品针叶浆并提高其配比，从而大幅提高成纸挺度，确保杯身挺硬厚实。
附图说明
图1是本发明生产的冷链液体包装纸参数图。
具体实施方式
实施例1：
本发明的冷链液体包装纸及其生产工艺，采用机内双元施胶工艺，同时满足液包纸持续抗水和耐乳酸的双重要求；采用机内微涂与机外整饰涂布相结合的涂布方式，最大限度提高成纸印刷面光滑细腻程度，此外涂层既可快速吸收印刷油墨，还能有效阻止油墨往纤维内部的迁移，提高印刷图案的色泽与鲜艳度；优选高品质商品针叶浆并提高其配比，从而大幅提高成纸挺度，确保杯身挺硬厚实。
本发明的冷链液体包装纸，包括原纸，及设置于原纸上的抗水耐乳酸施胶料，所述原纸包括面层、衬层、芯层和底层；所述面层和底层其浆料配比为：15~30%针叶和85~70%阔叶；所述衬层和芯层其浆料配比为10~25%针叶和90~75%自制化机浆；
所述抗水耐乳酸施胶层包括浆内施胶料和表面施胶料；所述浆内施胶料按照每吨原纸浆料施加10~20公斤松香胶和5~15公斤AKD；所述表面施胶料包括淋膜后与酸奶接触面胶料配料为表胶淀粉和1~6%表面施胶剂，印刷面胶料配料为15~30%胶黏剂和70~55%无机粉体；及涂布机上机外微涂胶料配料。
其中，所述涂布机上机外微涂胶料配料与印刷面胶料配料一致。所述胶黏剂为食品级高粘合强度涂布淀粉、胶乳和聚乙烯醇中的一种或多种。所述无机粉体包括超细轻质碳酸钙、超细重质碳酸钙、超细高岭土和超细滑石粉中的一种或多种；所述无机粉体还包括助剂。所述助剂为分散剂、增稠剂、保水剂和抗水剂中的一种或多种。所述松香胶为阴离子松香胶、阳离子松香胶、强化松香胶等中的一种或几种。
上述冷链液体包装纸其生产工艺为：通过该造纸机进行原纸生产，原纸生产时，加入浆内施胶料进行桨内施胶；完成原纸生产后，依次进行机内双面施胶和机外施胶，完成原纸生产。
其中，所述机内双面施胶具体如下：机内表面施胶时，在原纸的正反面同时施胶，一面采用酸奶接触面胶料施胶，另一面采用微涂胶料配料进行微涂施胶。所述机外施胶具体如下：造纸机出来后的纸送至涂布车间，并将印刷面胶料涂覆至原纸其微涂施胶的一面。
本发明的用于冷链液体包装纸及其生产工艺，选择绿色环保、新型高效的施胶剂，结合浆内双元施胶与表面施胶的方式，同时满足液包纸持续抗水、耐乳酸的双重要求；采用优化纤维配比，提高针叶浆比例，保证成纸良好的挺度、松厚度和强度指标；并采用机内微涂与机外整饰涂布相结合的涂布方式，最大限度提高成纸印刷面光滑细腻程度和印刷效果，
如图1所示，其生产出的包装纸具体参数指标如下：
（a）成纸耐乳酸为0.6kg·m-2/0.8kg·m-2（纵向/横向），明显优于美国进纸样1.2kg·m-2/1.5kg·m-2（纵向/横向）；
（b）表面平滑度为30s/10s（正面/反面），明显优于美国纸样9s/7s；
（c）成纸表面粗糙度4.55μm/6.80μm（正面/反面），接近美国水平4.50μm/6.15μm（正面/反面）。
上述实施例，仅是本发明的较佳实施方式，故凡依本发明专利申请范围所述的构造、特征及原理所做的等效变化或修饰，均包括于本发明专利申请范围内。

Claims (7)

1.一种用于冷链液体包装纸，其特征在于：包括原纸，及设置于原纸上的抗水耐乳酸施胶料，所述原纸包括面层、衬层、芯层和底层；所述面层和底层其浆料配比为：15~30%针叶和85~70%阔叶；所述衬层和芯层其浆料配比为10~25%针叶和90~75%自制化机浆；
所述抗水耐乳酸施胶层包括浆内施胶料和表面施胶料；所述浆内施胶料按照每吨原纸浆料施加10~20公斤松香胶和5~15公斤AKD；所述表面施胶料包括淋膜后与酸奶接触面胶料配料为表胶淀粉和1~6%表面施胶剂，印刷面胶料配料为15~30%胶黏剂和70~55%无机粉体；及涂布机上机外微涂胶料配料。
2.根据权利要求1所述的用于冷链液体包装纸，其特征在于：所述涂布机上机外微涂胶料配料与印刷面胶料配料一致。
3.根据权利要求1所述的用于冷链液体包装纸，其特征在于：所述胶黏剂为食品级高粘合强度涂布淀粉、胶乳和聚乙烯醇中的一种或多种。
4.根据权利要求1所述的用于冷链液体包装纸，其特征在于：所述无机粉体包括超细轻质碳酸钙、超细重质碳酸钙、超细高岭土和超细滑石粉中的一种或多种；所述无机粉体还包括助剂。
5.根据权利要求4所述的用于冷链液体包装纸，其特征在于：所述助剂为分散剂、增稠剂、保水剂和抗水剂中的一种或多种。
6.根据权利要求1所述的用于冷链液体包装纸，其特征在于：所述松香胶为阴离子松香胶、阳离子松香胶、强化松香胶中的一种或几种。
7.根据权利要求1所述的用于冷链液体包装纸，其特征在于：所述包装纸的生产工艺为：通过该造纸机进行原纸生产，原纸生产时，加入浆内施胶料进行桨内施胶；完成原纸生产后，依次进行机内双面施胶和机外施胶，完成原纸生产；
所述机内双面施胶具体如下：
机内表面施胶时，在原纸的正反面同时施胶，一面采用酸奶接触面胶料施胶，另一面采用微涂胶料配料进行微涂施胶；
所述机外施胶具体如下：
造纸机出来后的纸送至涂布车间，并将印刷面胶料涂覆至原纸其微涂施胶的一面。
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