CN106068183A - 在柔性包装应用中的最终白用作层压粘合剂的方法 - Google Patents

在柔性包装应用中的最终白用作层压粘合剂的方法 Download PDF

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CN106068183A
CN106068183A CN201580008267.8A CN201580008267A CN106068183A CN 106068183 A CN106068183 A CN 106068183A CN 201580008267 A CN201580008267 A CN 201580008267A CN 106068183 A CN106068183 A CN 106068183A
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viscous oil
compositions
oil ink
viscosity
ink
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威尔逊·A·帕多安
伊姆蒂亚兹·兰格沃拉
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TECHNOSOLUTIONS ASSESSORIA Ltda
Energy Sciences Inc
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Abstract

本申请涉及制造层压制品的方法，包括：用最终可能量固化的粘性油墨涂覆至少第一基底的至少一部分；将至少第二基底施加至所述第一基底的所涂覆的部分以形成层压制品；和将所述层压制品固化。本申请还涉及粘性油墨组合物，其包括至少一种丙烯酸酯单体、至少一种颜料、至少一种润湿剂和至少一种分散剂。

Description

在柔性包装应用中的最终白用作层压粘合剂的方法
背景技术
用于制造用于食品(例如，咸味零食、肉类和奶酪)、甚至非食品(例如清洁剂、织物柔顺剂等)的小袋形式的包装的层压制品通过将两个膜层压到一起而制成。通常上膜是反印的且随后被层压至相似的膜或相异的膜。在包装中所用的常规层压制品结构的示例的非详尽清单包括：
●BOPP(双向拉伸聚丙烯)/反印的/粘性的/可热封的金属化的BOPP(用于咸味零食的典型层压制品结构)；
●PET/反印的/粘性的/高阻隔密封膜(用于特定处理的肉类和奶酪的典型结构)；
●PE/反印的/粘性的/密封的PE膜(用于清洁剂的典型结构)；和
●BOPP/反印的/粘性的/BOPP(用于瓶上标签的典型结构)。
在印刷和层压中所涉及的典型步骤包括透明的第一膜的反印、将第一膜层压到第二膜、在任何和/或所有步骤期间的固化。层压制品还可以经受可选的后处理步骤，例如切割、产品填充等。
第一步骤涉及透明第一膜的反印。例如，这可以是在上述示例中描述的膜中的任一种膜。膜可以利用印刷方法来印刷，其包括：(a)基于溶剂或水的CI-柔性版印刷，其中热力干燥机干燥油墨；(b)UV固化堆栈柔性版印刷，其中UV将油墨固化；(c)基于水的堆栈柔性版印刷，其中热力干燥机干燥油墨；(d)基于溶剂或水的凹版印刷，其中热力干燥机干燥油墨；(e)UV或EB固化胶版印刷，其中UV或EB将油墨固化；和(f)热固化数字印刷(例如HPindigo)。
通常使用最终白色油墨层(本文也称为“最终白”、“最终白色”或“白色”)，其在已经施加所有的颜色或其他油墨层之后施加，且通常称为最终油墨层面(deck)。白色油墨层的作用是提供美学上的良好不透明度并且在透明膜被用作第二膜的情况下充当挡光板。该白色油墨层通常被流涂(flood coated)以提供先前表面(油墨)的完全覆盖。然而，非常常见的是在包装中具有小的窗口使得人们可以看见被包装的产品。在这些情况中，白色油墨层可以被印花。白色油墨可以是基于溶剂或水的，在该情况中，使用热力干燥机。可替选地，白色油墨层可以利用合适的固化设备进行UV固化或EB固化。
在单独的第二步骤中，利用层压设备(例如，层压机)，通过粘合剂将所印刷的第一膜层压至第二膜。层压粘合剂的示例包括(a)无溶剂粘合剂(例如，可用作两部分体系的聚氨酯类型的粘合剂，例如Henkel Liofol LA7773-21/LA6016-21无溶剂粘合剂)；(b)基于溶剂的粘合剂(例如这可以是一部分体系或两部分体系)；和(c)基于水的粘合剂。
粘合剂(b)和粘合剂(c)需要使用热力干燥机，而粘合剂(a)不需要热力干燥机。粘合剂(b)和粘合剂(c)可以通过凹版方法或柔版方法来施加，但是粘合剂(a)需要特定的三辊式涂布机以施加。这些特定的粘合剂施加方法通常可以在层压设备上实现。并且，这些粘合剂都是考虑时间的固化粘合剂。因此，根据所选的粘合剂的最终用途需求和类型，固化时间可以在任何位置从约24小时变化至约10天。在该固化时间期间，粘合剂必须保持在受控环境中以确保层压制品的合适粘结。
在固化之后，层压制品准备进行其他可选的操作步骤，诸如切割、产品填充等。
层压制品的发展随时间而演变。例如，存在用以实现来自这些层压制品粘合剂的即时粘结以允许市场要求的即时的后处理步骤以及因此较短的周转时间的市场需求。能量固化的UV粘合剂或EB粘合剂满足了这些需求。多个立即固化EB粘合剂的示例公开于美国专利申请公布No.2003/0031865、No.2006/003123、No.2006/000312和No.2006/0000545和美国专利No.8,163,127中。选择EB是因为其穿透不透明膜以固化粘合剂的能力，以及更容易地与食品法规相符。
还存在开发即时固化阻隔性粘合剂的市场需求。该阻隔性粘合剂除了提供优异的即时粘结之外，还必须提供对于特定包装用途所需的优异的氧气和香味阻隔性。该技术公开在包括以下的各个专利中：美国专利No.6,399,171、No.6,514,584、No.6,436,498、No.6,416,817和No.7,026,635。
然而，当前已知的层压工艺一直具有需要解决的技术限制以及成本无效率问题。
例如，以上描述的含有最终白色油墨层的所有第一基底需要被层压到第二膜，这需要使用单件的层压设备以及如所指出的层压粘合剂。这需要额外的设备和材料。
各种EB合适的有机功能性的gelflex油墨被描述在公开号为2013/0192483、2012/0220683和2011/0247508的美国专利申请中。该油墨例如可以用EB以约30kGy至约35kGy的剂量以及约110kV的电子能量固化。在一些实施方式中，最终白色被施加到初始油墨层，其然后全部通过电子束被固化到一起。然而，如上文指出，该固化的基底然后必须利用将层粘结在一起的单独的粘合剂材料在单独的层压站被层压至另一基底。需要更加成本有效的和技术上先进的溶液。
发明内容
在一个实施方式中，本申请的发明人考虑了更有效的方法，其通过将可EB固化的层压粘合剂性能并入印刷的第一膜基底的最终白色油墨层，然后将第一膜基底层压至第二膜基底，最终用一个电子束处理步骤固化整个层压结构。该方法更加精简，需要较少的设备且需要较少的固化步骤。
令所有发明人惊讶的是，该方法可行并且是意料之外的。考虑可EB固化的最终白色层，出乎意料地，具有油墨的较高的颜料负载以实现所需的粘度以及选择EB合适的可固化成分，产生了这样的油墨：当固化时，该油墨建立了在基底之间的合适粘性以及所需的最终产品的总体粘结性。
具体实施方式
以下实施例仅是例证性的，且不应该被理解成限制本公开。
实施例1-最终白色层压粘合剂的配方(EB和UV)
EB配方：
产品 说明 供应商 ％
Omnistab IN 535 稳定剂 IGM Resins 0.5
TegoGlide 432 润湿剂 Evonik 1.0
TegoDispers685 分散剂 Evonik 0.5
TMPTA 丙烯酸酯单体 Sartomer 12.0
TMP(3EO)TA 丙烯酸酯单体 Sartomer 18.0
NPG(2PO)TA 丙烯酸酯单体 Sartomer 18.0
二氧化钛R 902 颜料 DuPont 50.0
UV配方：
产品 说明 供应商 ％
Omnistab IN 535 稳定剂 IGM Resins 0.47
TegoGlide 432 润湿剂 Evonik 0.94
TegoDispers685 分散剂 Evonik 0.47
TMPTA 丙烯酸酯单体 Sartomer 11.28
TMP(3EO)TA 丙烯酸酯单体 Sartomer 16.92
NPG(2PO)TA 丙烯酸酯单体 Sartomer 16.92
二氧化钛R 902 颜料 DuPont 47.00
Speedcure TPO-L 光引发剂 Lambson 6.00
实施例2
第一膜：利用基于常规溶剂的油墨反印的聚乙烯。50微米(μm)厚。
第二膜：透明聚乙烯，50μm厚。
如通过达因笔所测量的，两种膜被电晕处理至38达因/厘米至40达因/厘米的达因水平。利用Myer杆#6，如实施例1中所制备的白色层压粘合剂被施加到第一膜。第二膜然后被层压到该第一膜。层压制品于是用辊轧制以提供在粘合剂和膜之间的良好的表面接触。该层压制品然后在ESI pilot EB装置上在140kV和30kGy下被固化。
实施例3
第一膜：利用基于常规溶剂的油墨反印的聚乙烯。50μm厚。
第二膜：透明BOPP，30μm厚。
如通过达因笔所测量的，两种膜被电晕处理至38达因/厘米至40达因/厘米的达因水平。利用Myer杆#6，如实施例1中所制备的白色层压粘合剂被施加到第一膜。第二膜然后被层压到该第一膜。层压制品于是用辊轧制以提供在粘合剂和膜之间的良好的表面接触。该层压制品然后在ESI pilot EB装置上在140kV和30kGy下被固化。
在EB处理之后，利用TEE剥离标准在1英尺宽的带材上测试两种层压制品的粘性。对于这两种层压制品，观察膜撕裂。层压制品的不透明度是优异的。这些实施例示出最终白色可以用作层压粘合剂。
实施例4-最终白色层压粘合剂的配方
产品 说明 供应商 ％
Omnistab IN 535 稳定剂 IGM Resins 0.5
TegoGlide 432 润湿剂 Evonik 1.0
TegoDispers685 分散剂 Evonik 0.5
TMPTA 丙烯酸酯单体 Sartomer 6.0
TMP(3EO)TA 丙烯酸酯单体 Sartomer 15.0
TPGDA 丙烯酸酯单体 Sartomer 9.0
NPG(2PO)TA 丙烯酸酯单体 Sartomer 18.0
二氧化钛R 902 颜料 DuPont 50.0
当用EB装置以3Mrad至3.5Mrad的剂量固化在实施例4中所提供的层压粘合剂配方时，在实施例4中所提供的层压粘合剂配方预期对诸如BOPP、涂覆的PET、PE coex、高阻隔基密封膜的相似的膜和相异的膜提供粘性。
实施例5-最终白色层压粘合剂的配方
产品 说明 供应商 ％
Omnistab IN 535 稳定剂 IGM Resins 0.5
TegoGlide 432 润湿剂 Evonik 1.0
TegoDispers685 分散剂 Evonik 0.5
TMPTA 丙烯酸酯单体 Sartomer 6.0
TMP(3EO)TA 丙烯酸酯单体 Sartomer 15.0
TPGDA 丙烯酸酯单体 Sartomer 9.0
NPG(2PO)TA 丙烯酸酯单体 Sartomer 12.0
酸性官能团 三丙烯酸酯单体 Sartomer 6.0
二氧化钛R 902 颜料 DuPont 50.0
当用EB装置以3Mrad至3.5Mrad的剂量固化在实施例5中所提供的层压粘合剂配方时，在实施例5中所提供的层压粘合剂配方预期对诸如BOPP、涂覆的PET、金属化的BOPP、铝箔和聚烯烃基密封膜的相似的膜和相异的膜提供粘性。
实施例4和实施例5的层压粘合剂配方也可以通过添加光引发剂而改性，如果必要，进行组成调整，使得层压粘合剂配方是可UV固化的。
从本申请的说明书和实践出发，本公开的其他实施方式对于本领域的技术人员是明显的。其意图是所有的说明书和实施例仅仅作为示例性考虑，通过权利要求书指出本公开的真正范围和精神。

Claims (16)

1.一种制造层压制品的方法，包括：
用最终可能量固化的粘性油墨涂覆至少第一基底的至少一部分；
将至少第二基底施加至所述第一基底的所涂覆的部分以形成层压制品；和将所述层压制品固化。
2.如权利要求1所述的方法，其中，在固化之前，对所述层压制品施加压力。
3.如前述权利要求中任一项所述的方法，其中，利用辊施加压力。
4.如权利要求2所述的方法，其中，利用EB能量或UV能量使所述层压制品固化。
5.如权利要求2所述的方法，其中，所述可能量固化的粘性油墨被着色。
6.如前述权利要求中任一项所述的方法，其中，通过流涂施加所述可能量固化的粘性油墨。
7.如前述权利要求中任一项所述的方法，其中，通过花纹涂装施加所述可能量固化的粘性油墨。
8.一种粘性油墨组合物，所述粘性油墨组合物包括至少一种丙烯酸酯单体、至少一种颜料、至少一种润湿剂和至少一种分散剂。
9.如权利要求8所述的粘性油墨组合物，其中，所述至少一种颜料以约40％至约50％的量存在。
10.如权利要求8所述的粘性油墨组合物，还包括稳定剂。
11.如权利要求8至10所述的粘性油墨组合物，还包括光引发剂。
12.如权利要求8至11所述的粘性油墨组合物，还包括酸性官能团三丙烯酸酯单体。
13.如权利要求8至12所述的粘性油墨组合物，其中，所述组合物是可EB固化的。
14.如权利要求8至12所述的粘性油墨组合物，其中，所述组合物是可UV固化的。
15.如权利要求8至14所述的粘性油墨组合物，其中，所述组合物具有良好的不透明度。
16.如权利要求8至14所述的粘性组合物，其中，所述组合物对选自由以下构成的组的膜呈现出粘性：BOPP、涂覆的PET、金属化的BOPP、PE coex、高阻隔基密封膜、和铝箔和聚烯烃基密封膜。
CN201580008267.8A 2014-02-12 2015-02-12 在柔性包装应用中的最终白用作层压粘合剂的方法 Pending CN106068183A (zh)

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