CN115464998B - 一种热转印碳带及其制备方法 - Google Patents

一种热转印碳带及其制备方法 Download PDF

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CN115464998B
CN115464998B CN202211248434.4A CN202211248434A CN115464998B CN 115464998 B CN115464998 B CN 115464998B CN 202211248434 A CN202211248434 A CN 202211248434A CN 115464998 B CN115464998 B CN 115464998B
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parts
coating
thermal transfer
liquid
back coating
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CN115464998A (zh
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嵇高晶
李辉
李顺
崔仲辉
任天航
伍衡
文添俊
孟佳成
唐国初
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Hunan Dingyi Zhizao Digital Equipment Technology Development Co ltd
Hunan Dingyi Zhiyuan Technology Development Co Ltd
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Abstract

本发明涉及一种热转印碳带及其制备方法，属于软标打印技术领域。热转印碳带，包括自上而下依次贴合设置的背涂层、基体、离型层和油墨层；所述背涂层由以下重量份数的原料混合后再涂布而成：溶剂150‑250份、耐热性树脂15‑30份、清洁填料2‑10份、润滑剂0.2‑1份、分散剂0.2‑0.5份、抗静电剂0.2‑0.5份和交联剂5‑10份。本发明还公开了上述热转印碳带的制备方法。有益效果：通过在背涂液中加入能够起到清洁效果的填料，物理刮除粘附在打印头上的渣滓，从而起到保护打印头的作用。

Description

一种热转印碳带及其制备方法
技术领域
本发明属于软标打印技术领域，具体涉及一种热转印碳带及其制备方法。
背景技术
现有的树脂碳带往往在连续高速打印时，容易产生渣滓粘附在打印头上，导致打印质量的下降乃至打印头的损坏。本发明中，通过添加具有清洁功能的填料，从而在打印时能够清理打印头上粘附的渣滓，延长打印头的寿命。原理：在连续打印时，来自打印头的温度会有一个累积的过程，这就导致在持续工作时，与打印头接触的背涂层极易产生渣滓粘附在打印头上，这些渣滓一般是被剥离的树脂或是未反应完的异氰酸酯固化剂等。自清洁填料一方面是受热时能够熔融流动从而带走部分渣滓的金属皂，一方面是能够物理的刮除粘附在打印头上渣滓的莫氏硬度小于5的无机颗粒，此类无机颗粒的粒径需要大于涂层厚度，这样能够突出在外，形成像梳子一样的结构，在打印时带走产生的渣滓。
因此，提出一种热转印碳带及其制备方法以解决现有技术中存在的不足。
发明内容
本发明为了解决上述技术问题提供热转印碳带，通过在背涂液中加入能够起到清洁效果的填料，物理刮除粘附在打印头上的渣滓，从而起到保护打印头的作用。
本发明解决上述技术问题的技术方案如下：热转印碳带包括自上而下依次贴合设置的背涂层、基体、离型层和油墨层；
所述背涂层由以下重量份数的原料混合后再涂布而成：溶剂150-250份、耐热性树脂15-30份、金属皂1份、清洁填料2-10份、润滑剂0.2-1份、分散剂0.2-0.5份、抗静电剂0.2-0.5份和交联剂5-10份；
所述离型层由以下重量份数的原料混合后再涂布而成：溶剂50-200份、第一聚酯树脂10-20份和聚乙二醇2-5份；
所述油墨层由以下重量份数的原料混合后再涂布而成：溶剂70-100份、第二聚酯树脂5-15份、无机颜料5-10份和固体颗粒0.5-1份。
有益效果：通过在背涂液中加入能够起到清洁效果的填料，物理刮除粘附在打印头上的渣滓，从而起到保护打印头的作用。
原理说明：为了在打印时能够清理掉粘附在打印头上的渣滓，需要加入具有清洁效果的填料微粒，这类填料能够在打印时物理的刮除粘附在打印头上的积料。该类填料优选为莫氏硬度小于5且粒径大于1um且小于5um的高岭土，粘土，云母等，同时含有金属皂，金属皂的熔点优选的在120℃-140℃之间，如若低于该范围内，则起不到明显的效果，高于该数值范围时，会存在打印质量下降的缺陷，金属皂在打印时可以熔融流动从而带走部分粘附在打印头上的渣滓，配合清洁类填料，大幅度提高打印质量。
在上述技术方案的基础上，本发明还可以做如下改进。
进一步，所述基体为聚对苯二甲酸乙二醇酯膜、1,4-聚环亚己基二亚甲基对苯二甲酸酯膜、聚萘二甲酸乙二醇酯、聚苯硫醚膜、聚苯乙烯膜、聚丙烯膜、聚乙烯膜、聚氯乙烯膜、尼龙膜、聚酰亚胺膜中的任意一种。
有益效果：采用上述的膜作为基材能够更好的保证背涂层、离型层能够有效涂布在基材表面。
进一步，所述清洁填料为高岭土、粘土、云母、氧化硅、氧化钛、氧化锌和硅酮树脂中的任意一种。
有益效果：物理刮除粘附在打印头上的渣滓，从而起到保护打印头的作用。
进一步，所述溶剂为2-丁酮和甲苯中的一种或两种的混合。
有益效果：采用2-丁酮和/或甲苯作为溶剂能够保证背涂层、离型层和油墨层中组分充分的分散混合。
进一步，所述基体的厚度为4-10μm，所述背涂层的厚度为0.2-1.2μm，所述离型层的厚度为0.2-0.6μm，所述油墨层的厚度为0.3-0.8μm。
有益效果：在此厚度范围内能够保证热转印碳带的厚度，同时对基材的附着力和耐磨作用好。
进一步，所述润滑剂为硅油、聚乙烯蜡、石蜡、高级脂肪酸酯、高级脂肪酰胺和高级脂肪族醇中的任意一种；所述分散剂为阴离子型表面活性剂、阳离子型表面活性剂、非离子型表面活性剂、有机羧酸中的任意一种；所述抗静电剂为长链烷基季铵盐、烷基磺酸盐、烷基磷酸、二硫代氨基甲酸盐、乙氧基化脂肪族烷基胺中的任意一种；所述交联剂为异氰酸酯。
有益效果：润滑剂减少打印头与基材之间的摩擦阻力提高润滑效果；分散剂提高涂层组分的分散性；抗静电剂增加基材的抗静电性能；粘合剂提高耐热树脂与基材的粘结性，保障涂层的耐热和稳定性。
进一步，所述无机颜料为炭黑；所述固体颗粒为二氧化硅、硬脂酸锌、热固性丙烯酸颗粒中的任意一种。
有益效果：炭黑的着色效果好，固体颗粒能提高润滑效果，改善保存和运输过程中高温高湿环境对碳带的不利影响，确保正常的打印质量。
进一步，所述耐热性树脂为聚氨酯改性有机硅树脂、丙烯酸改性有机硅树脂、聚乙烯醇缩乙醛系树脂、聚乙烯醇缩丁醛系树脂中的任意一种。
有益效果：防止热转印时温敏加热头加热导致的发粘或褶皱的产生等不良影响；优选Tg为90℃及以上的耐热性好的树脂，当树脂的Tg低于此数值时，耐热性明显不足，打印时造成断带。分子量优选70000-90000，分子量低时涂层的韧性较差，分子量太大时背涂液稳定性欠佳。
本发明为实现上述目的之二提供一种热转印碳带的制备方法，包括以下步骤：
S1：备液：
背涂液：将耐热性树脂10-30份加入到150-250份的溶剂溶解，然后加入清洁填料2-10份、金属皂1份、润滑剂0.2-1份、分散剂0.2-0.5份、抗静电剂0.2-0.5份和交联剂5-10份搅拌混合后，制成背涂液，备用；
离型液：将第一聚酯树脂5-35份、聚乙二醇0.5-5份加入到50-200份的溶剂溶解，制成离型液，备用；
油墨液：将第二聚酯树脂5-15份加入到70-100份的溶剂溶解，然后加入无机颜料5-10份和固体颗粒0.5-1份搅拌混合后，制成油墨液，备用；
S2：打电晕；
提供一基体，在所述基体的两面上打上电晕；
S3：涂布；
将步骤S1制得的背涂液涂布在步骤S2的所述基体打电晕的一面上，然后烘干形成背涂层，待用；
然后将步骤S1制得的离型液涂布在步骤S2的所述基体远离所述背涂层的一面上，然后烘干形成离型层；
最后将步骤S1制得的油墨液涂布在步骤S3的所述离型层远离所述基体的一面上，即得到热转印碳带。
进一步，步骤S3中，采用200～250线的陶瓷网纹辊涂布背涂液，所述涂布的速度为60-100m/min，所述烘干温度为60-100℃；采用230～250线的陶瓷网纹辊涂布离型液，所述涂布的速度为60-100m/min，所述烘干温度为60-100℃；采用200～250线的陶瓷网纹辊涂布离型液，所述涂布的速度为60-100m/min，所述烘干温度为60-100℃。
有益效果：采用上述制备方法能够制备得到的碳带，通过在背涂液中加入能够起到清洁效果的填料，物理刮除粘附在打印头上的渣滓，从而起到保护打印头的作用，可适用多种基材，碳带的制作成本低、工艺简单可行。
附图说明
图1为本发明的碳带的层结构示意图；
图2为本发明的打印测试的样板图；
具体实施方式
以下结合附图对本发明的原理和特征进行描述，所举实例只用于解释本发明，并非用于限定本发明的范围。
实施例1：
本实施例提供一种热转印碳带，包括自上而下依次贴合设置的背涂层、基体、离型层和油墨层。
其中，基体为厚度为1-10μm的聚对苯二甲酸乙二醇酯；
所述背涂层由以下重量份数的原料涂布而成：2-丁酮100份、甲苯100份、聚氨酯改性有机硅树脂5份、丙烯酸改性有机硅树脂5份、聚乙烯醇缩乙醛系树脂10份、聚乙烯醇缩丁醛系树脂10份、高岭土5份(粒径2μm)、金属皂1份、反应型硅油0.5份、分散剂2份、抗静电剂2份和多异氰酸酯8份；
所述离型层由以下重量份数的原料涂布而成：2-丁酮43份、甲苯42.5份、第一聚酯树脂14份(分子量在3000-15000间，Tg值在50-100℃间)、聚乙二醇2.5份；
所述油墨层由以下重量份数的原料涂布而成：2-丁酮40份、甲苯41份、第二聚酯树脂9份(分子量在3000-20000间，优选5000-15000，羟基值>10mg/g,Tg在50℃-90℃间)、炭黑6份和填料颗粒0.5份。
热转印碳带的制备：
将聚对苯二甲酸乙二醇酯的一面打上电晕；
根据背涂层各组分的重量份数，取料，混合制成背涂液；
用200～250线的陶瓷网纹辊将背涂液涂布在第一PET基材打电晕一面，在60℃温度下烘干待用；
根据离型层各组分的重量份数，取料，混合制成离型液；
用230～250线的陶瓷网纹辊将离型液涂布在基体远离所述背涂层一面，在60℃温度下烘干待用；
用200～250线的陶瓷网纹辊将油墨液涂布在离型层远离所述基体一面，在60℃温度下烘干即得到热转印碳带。
实施例2：
本实施例与实施例1不同之处在于；
所述背涂层由以下重量份数的原料涂布而成：2-丁酮100份、甲苯100份、聚氨酯改性有机硅树脂5份、丙烯酸改性有机硅树脂5份、聚乙烯醇缩乙醛系树脂10份、聚乙烯醇缩丁醛系树脂10份、高岭土4份、云母1份、金属皂1份、反应型硅油0.5份、分散剂2份、抗静电剂2份和多异氰酸酯8份。
实施例3：
本实施例与实施例1不同之处在于；
所述背涂层由以下重量份数的原料涂布而成：2-丁酮100份、甲苯100份、聚氨酯改性有机硅树脂5份、丙烯酸改性有机硅树脂5份、聚乙烯醇缩乙醛系树脂10份、聚乙烯醇缩丁醛系树脂10份、高岭土3份、云母2份、金属皂1份、反应型硅油0.5份、分散剂2份、抗静电剂2份和多异氰酸酯8份。
实施例4：
本实施例与实施例1不同之处在于；
所述背涂层由以下重量份数的原料涂布而成：2-丁酮100份、甲苯100份、聚氨酯改性有机硅树脂5份、丙烯酸改性有机硅树脂5份、聚乙烯醇缩乙醛系树脂10份、聚乙烯醇缩丁醛系树脂10份、高岭土3份、云母1份、粘土1份、金属皂1份、反应型硅油0.5份、分散剂2份、抗静电剂2份和多异氰酸酯8份。
实施例5：
本实施例与实施例1不同之处在于；
所述背涂层由以下重量份数的原料涂布而成：2-丁酮100份、甲苯100份、聚氨酯改性有机硅树脂5份、丙烯酸改性有机硅树脂5份、聚乙烯醇缩乙醛系树脂10份、聚乙烯醇缩丁醛系树脂10份、高岭土3份、云母1份、碳酸钙1份、金属皂1份、反应型硅油0.5份、分散剂2份、抗静电剂2份和多异氰酸酯8份。
实施例6：
本实施例与实施例1不同之处在于；
所述背涂层由以下重量份数的原料涂布而成：2-丁酮100份、甲苯100份、聚氨酯改性有机硅树脂5份、丙烯酸改性有机硅树脂5份、聚乙烯醇缩乙醛系树脂10份、聚乙烯醇缩丁醛系树脂10份、高岭土2份、云母2份、粘土1份、金属皂1份、反应型硅油0.5份、分散剂2份、抗静电剂2份和多异氰酸酯8份。
实施例7：
本实施例与实施例1不同之处在于；
所述背涂层由以下重量份数的原料涂布而成：2-丁酮100份、甲苯100份、聚氨酯改性有机硅树脂5份、丙烯酸改性有机硅树脂5份、聚乙烯醇缩乙醛系树脂10份、聚乙烯醇缩丁醛系树脂10份、高岭土2份、云母2份、碳酸钙1份、金属皂1份、反应型硅油0.5份、分散剂2份、抗静电剂2份和多异氰酸酯8份。
实施例8：
本实施例与实施例1不同之处在于；
所述背涂层由以下重量份数的原料涂布而成：2-丁酮100份、甲苯100份、聚氨酯改性有机硅树脂5份、丙烯酸改性有机硅树脂5份、聚乙烯醇缩乙醛系树脂10份、聚乙烯醇缩丁醛系树脂10份、高岭土2份、碳酸钙3份、金属皂1份、反应型硅油0.5份、分散剂2份、抗静电剂2份和多异氰酸酯8份。
实施例9：
本实施例与实施例1不同之处在于；
所述背涂层由以下重量份数的原料涂布而成：2-丁酮100份、甲苯100份、聚氨酯改性有机硅树脂5份、丙烯酸改性有机硅树脂5份、聚乙烯醇缩乙醛系树脂10份、聚乙烯醇缩丁醛系树脂10份、高岭土2份、粘土3份、金属皂1份、反应型硅油0.5份、分散剂2份、抗静电剂2份和多异氰酸酯8份。
对比例1：
本实施例与实施例1一样的基材、背涂层、离型层、油墨层、涂布厚度、以及工艺方法，但背涂层中不添加金属皂，添加二氧化硅3份和石墨2份。
对比例2：
本实施例与实施例1一样的基材、背涂层、离型层、油墨层、涂布厚度、以及工艺方法，但背涂层中不添加金属皂，添加石墨3份和聚乙烯蜡2份。
对比例3：
本实施例与实施例1一样的基材、背涂层、离型层、油墨层、涂布厚度、以及工艺方法，但背涂层中不添加金属皂，添加聚乙烯蜡3份和氢氧化铝2份。
对比例4：
本实施例与实施例1一样的基材、背涂层、离型层、油墨层、涂布厚度、以及工艺方法，但背涂层中不添加清洁填料。
实施例1-9与对比例1-3打印样品的性能测试。
使用标签打印机(Zebra公司制造、型号105SLPlus)，通过本实施例制得的树脂碳带，放置在恒温箱中进行环测，在温度/湿度条件为-20℃/20％、60℃/20％和60℃/90％的环境下分别放置12h，环测持续36h。在哑银纸、铜版纸、PP薄膜上转印图2所示的线条(0.6pt粗)；打印速度设为12.7cm/s，打印浓度为25。
通过目视确认所形成的图像，通过以下评价基准进行评价：
A：图像中未观察到未打印细线及细点；
B：图像中观察到一些3个以下未打印细线及细点；
C：图像中观察到3-20个以下未打印细线及细点；
NG：图像中观察到20个以上未打印细线及细点。
环测结束后，观察碳带正背面粘连情况，通过以下评价基准进行评价：
A：环测结束后碳带正背面完全不粘连且不剥离
B：环测结束后碳带正背面轻微粘连且不剥离
C：环测结束后碳带正背面轻微粘连且部分剥离
NG：环测结束后碳带正背面大量粘连且部分剥离
测试结果：
综上，通过上述打印测试结果，实施例1-9与对比例4对比，在背涂层加入清洁填料颗粒，提高打印质量，保障打印头的清洁度；通过实施例1-9与对比例1-4对比，金属皂在打印时可以熔融流动从而带走部分粘附在打印头上的渣滓，配合清洁类填料，大幅度提高打印质量。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
以上仅为本发明的较佳实施例，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (8)

1.一种热转印碳带，其特征在于，包括自上而下依次贴合设置的背涂层、基体、离型层和油墨层；
所述背涂层由以下重量份数的原料混合后再涂布而成：溶剂150-250份、耐热性树脂15-30份、金属皂1份、清洁填料2-10份、润滑剂0.2-1份、分散剂2份、抗静电剂2份和交联剂5-10份；
所述离型层由以下重量份数的原料混合后再涂布而成：溶剂50-200份、第一聚酯树脂10-20份和聚乙二醇2-5份；
所述油墨层由以下重量份数的原料混合后再涂布而成：溶剂70-100份、第二聚酯树脂5-15份、无机颜料5-10份和固体颗粒0.5-1份；
所述清洁填料为高岭土、粘土、云母、氧化硅、氧化钛、氧化锌和硅酮树脂中的任意一种；
所述填料的莫氏硬度小于5且粒径大于1um且小于5um，所述金属皂的熔点在120℃-140℃之间；
所述润滑剂为硅油、聚乙烯蜡、石蜡、高级脂肪酸酯、高级脂肪酰胺和高级脂肪族醇中的任意一种；所述分散剂为阴离子型表面活性剂、阳离子型表面活性剂、非离子型表面活性剂、有机羧酸中的任意一种；所述抗静电剂为长链烷基季铵盐、烷基磺酸盐、烷基磷酸、二硫代氨基甲酸盐、乙氧基化脂肪族烷基胺中的任意一种；所述交联剂为异氰酸酯。
2.根据权利要求1所述的热转印碳带，其特征在于，所述基体为聚对苯二甲酸乙二醇酯膜、1,4-聚环亚己基二亚甲基对苯二甲酸酯膜、聚萘二甲酸乙二醇酯、聚苯硫醚膜、聚苯乙烯膜、聚丙烯膜、聚乙烯膜、聚氯乙烯膜、尼龙膜、聚酰亚胺膜中的任意一种。
3.根据权利要求1所述的热转印碳带，其特征在于，所述溶剂为2-丁酮和甲苯中的一种或两种的混合。
4.根据权利要求1所述的热转印碳带，其特征在于，所述基体的厚度为4-10μm，所述背涂层的厚度为0.2-1.2μm，所述离型层的厚度为0.2-0.6μm，所述油墨层的厚度为0.3-0.8μm。
5.根据权利要求1所述的热转印碳带，其特征在于，所述无机颜料为炭黑；所述固体颗粒为二氧化硅、硬脂酸锌、热固性丙烯酸颗粒中的任意一种。
6.根据权利要求1所述的热转印碳带，其特征在于，所述耐热性树脂为聚氨酯改性有机硅树脂、丙烯酸改性有机硅树脂、聚乙烯醇缩乙醛系树脂、聚乙烯醇缩丁醛系树脂中的任意一种。
7.一种根据权利要求1-6任一项所述的热转印碳带的制备方法，其特征在于，包括以下步骤：
S1：备液：
背涂液：将耐热性树脂15-30份加入到150-250份的溶剂溶解，然后加入清洁填料2-10份、金属皂1份、润滑剂0.2-1份、分散剂2份、抗静电剂2份和交联剂5-10份搅拌混合后，制成背涂液，备用；
离型液：将第一聚酯树脂10-20份、聚乙二醇2-5份加入到50-200份的溶剂溶解，制成离型液，备用；
油墨液：将第二聚酯树脂5-15份加入到70-100份的溶剂溶解，然后加入无机颜料5-10份和固体颗粒0.5-1份搅拌混合后，制成油墨液，备用；
S2：打电晕；
提供一基体，在所述基体的两面上打上电晕；
S3：涂布；
将步骤S1制得的背涂液涂布在步骤S2的所述基体打电晕的一面上，然后烘干形成背涂层，待用；
然后将步骤S1制得的离型液涂布在步骤S2的所述基体远离所述背涂层的一面上，然后烘干形成离型层；
最后将步骤S1制得的油墨液涂布在步骤S3的所述离型层远离所述基体的一面上，即得到热转印碳带。
8.根据权利要求7所述的热转印碳带的制备方法，其特征在于，步骤S3中，采用200～250线的陶瓷网纹辊涂布背涂液，所述涂布的速度为60-100m/min，所述烘干的温度为60-100℃；采用230～250线的陶瓷网纹辊涂布离型液，所述涂布的速度为60-100m/min；所述烘干的温度为60-100℃；采用200～250线的陶瓷网纹辊涂布油墨液，所述涂布的速度为60-100m/min。
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