CN115443194A - 凹版涂布机测试装置和凹版涂布机 - Google Patents

凹版涂布机测试装置和凹版涂布机 Download PDF

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CN115443194A
CN115443194A CN202180026542.4A CN202180026542A CN115443194A CN 115443194 A CN115443194 A CN 115443194A CN 202180026542 A CN202180026542 A CN 202180026542A CN 115443194 A CN115443194 A CN 115443194A
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gravure
sensitive adhesive
aqueous pressure
gravure roll
coater
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徐成钟
朴圭连
梁承勋
李胜模
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LG Chem Ltd
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Abstract

根据本发明的一个实施方案的凹版涂布机测试装置包括：彼此外接的凹版辊和背辊；电机，其驱动部分地浸没在用于涂布的水性压敏粘合剂中的凹版辊；控制器，其调节所述电机的转速；刮刀，其从多种类型中选择，以将所述水性压敏粘合剂从正在旋转的凹版辊的表面刮除；和红外分析仪，使得能够确认与所选择的刮刀对应的水性压敏粘合剂的至少一种类型、涂层表面的均匀性和涂布的水性压敏粘合剂的量。

Description

凹版涂布机测试装置和凹版涂布机
技术领域
相关申请的交叉引用
本申请要求基于2020年4月7日提交的韩国专利申请No.10-2020-0042334的优先权的权益，该韩国专利申请文件中公开的全部内容并入作为本说明书中的一部分。
本发明涉及一种凹版涂布机测试装置和凹版涂布机。更具体地，涉及一种凹版涂布机测试装置，用于确认凹版涂布机的各种现象(例如，渗出现象和涂布现象)；和应用测试结果的凹版涂布机。
背景技术
根据一个实例，凹版涂布机包括：压敏粘合剂托盘，其容纳作为涂布材料的压敏粘合剂；凹版辊，其部分地浸没在压敏粘合剂托盘(胶乳托盘)中并且在形成在凹版辊的表面上的图案凹槽被压敏粘合剂填充的状态下旋转；和外接在凹版辊上并且旋转的背辊。
当在外接的凹版辊和背辊彼此相对地旋转的同时在凹版辊与背辊之间行进涂膜时，填充在图案凹槽中的压敏粘合剂被转印至涂膜的一个表面。
此时，在凹版辊的一侧上设置刮刀以刮除除了填充在图案凹槽中的压敏粘合剂之外的粘附至凹版辊的表面的压敏粘合剂。因此，可以将填充在图案凹槽中的压敏粘合剂涂布在涂膜上至设定的涂布量和所需要的涂布性能。
凹版涂布机是高速涂布设备，当凹版涂布机在高速下驱动时，根据凹版辊的转速，会出现压敏粘合剂或水性压敏粘合剂从凹版辊的表面流向其侧边的渗出现象。因此，涂布在涂膜上的压敏粘合剂或水性压敏粘合剂的涂布厚度(涂布量和涂布性能)变得不均匀，并且在宽度方向上的两侧会出现涂膜的收缩现象。
然而，在没有能够验证这些问题的方法的状况下，只能在实地大规模生产产品的凹版涂布机中测试涂布现象。因此，现实中难以对凹版涂布机进行各种测试(例如，由于刮刀与水性压敏粘合剂之间的关系的渗出现象，以及关于水性压敏粘合剂的涂布量和涂布性能的涂布现象)。
发明内容
技术问题
本发明的一个方面是提供一种能够对凹版涂布机测试各种现象(例如，渗出现象和涂布现象)的凹版涂布机测试装置。此外，本发明的另一方面是提供一种在用所述凹版涂布机测试装置完成测试之后应用的凹版涂布机。
技术方案
根据本发明的一个实施方案的凹版涂布机测试装置包括：彼此外接的凹版辊和背辊；电机，其驱动部分地浸没在用于涂布的水性压敏粘合剂中的凹版辊；控制器，其调节所述电机的转速；刮刀，其从多种类型中选择，以将所述水性压敏粘合剂从正在旋转的所述凹版辊的表面刮除；和红外分析仪，其使得能够确认与所选择的刮刀对应的水性压敏粘合剂的至少一种类型、涂层表面的均匀性以及涂布的水性压敏粘合剂的量。
所述刮刀可以包括前端部，该前端部形成朝向所述凹版辊的旋转方向的弯曲表面。
所述刮刀的前端部的下表面的延长线与所述凹版辊的外切线可以形成60°至120°的交角。
所述水性压敏粘合剂的粘度可以为50cPs至70cPs(厘泊，g/cm s)。
根据本发明的一个实施方案的凹版涂布机测试装置还可以包括：用于测量所述水性压敏粘合剂的粘度的粘度计；和用于测量所述水性压敏粘合剂的固体含量的水分计。
根据本发明的一个实施方案的凹版涂布机包括：彼此外接的凹版辊和背辊；电机，其驱动部分地浸没在用于涂布的水性压敏粘合剂中的凹版辊；和刮刀，其从多种类型中选择以将所述水性压敏粘合剂从所述旋转的凹版辊的表面刮除，使得填充在所述凹版辊的凹槽中的水性压敏粘合剂凹版印刷到在所述凹版辊与所述背辊之间行进的涂膜上。
有益效果
由于一个实施方案的凹版涂布机测试装置利用控制器来调节驱动凹版辊的电机的转速来控制凹版辊的转速，并且可以通过红外分析仪确认涂布的水性压敏粘合剂的至少一种类型、涂层表面的均匀性和涂布的水性压敏粘合剂的量，因此，能够从多种类型的刮刀中选择合适的刮刀以与水性压敏粘合剂对应。
因此，一个实施方案的凹版涂布机测试装置可以测试和确认当在对凹版涂布机更换刮刀和水性压敏粘合剂的同时涂布水性压敏粘合剂时所发生的各种现象，如渗出现象、涂布现象等。
另外，一个实施方案的凹版涂布机可以在通过所述凹版涂布机测试装置完成刮刀的测试之后，将测试完成的刮刀与水性压敏粘合剂之间的关系应用于实际大规模生产中来使用。此时，通过应用测试与大规模生产之间的比例关系，可以将凹版涂布机以适合大规模生产的比例制造得更大之后用于生产现场中。
附图说明
图1是根据本发明的一个实施方案的凹版涂布机测试装置的框图；
图2是示出根据本发明的一个实施方案的凹版涂布机测试装置和凹版涂布机的立体图；
图3是图2的侧视图；
图4是示出刮刀与凹版辊接触的状态的放大部分的局部放大图。
具体实施方式
下文中，将参照附图详细描述本发明的实施方案，使得本发明所属领域的普通技术人员可以容易地实施它们。如本领域技术人员将了解的，在不脱离本发明的范围的情况下，描述的实施方案均可以以各种不同的方式修改。附图和描述应当认为在本质上是说明性的而非限制性的。在整个说明书中，相同的参考数字表示相同的部件。
图1是根据本发明的一个实施方案的凹版涂布机测试装置的框图。参照图1，根据一个实施方案的凹版涂布机测试装置包括：凹版涂布机1、控制器2和红外分析仪3。此外，所述凹版涂布机测试装置还可以包括粘度计4和水分计5。
图2是示出根据本发明的一个实施方案的凹版涂布机测试装置和凹版涂布机的立体图。参照图1和图2，根据一个实施方案的凹版涂布机1包括：凹版辊11、背辊12、电机13和刮刀15。
凹版辊11和背辊12彼此外接并且被旋转驱动，并且在它们之间行进涂膜16的同时使得能够在涂膜16的一侧上进行涂布。凹版辊11在其表面上设置有图案凹槽(未示出)，使得填充在图案凹槽中的涂料CM(下文中，称为“水性压敏粘合剂”的一个实例)被转印至涂膜16的表面。
电机13安装在凹版辊11的驱动轴111上，以进行凹版辊11的旋转运动。根据凹版辊11的旋转，背辊12与凹版辊11外接，以在与凹版辊11的旋转相反的方向上旋转的同时使涂膜16行进。尽管未示出，但是电机可以安装在背辊上，使得能够通过旋转背辊来使凹版辊旋转。
凹版辊11在部分地浸没在用于涂布的水性压敏粘合剂CM中的状态下通过电机13旋转。水性压敏粘合剂CM容纳在压敏粘合剂托盘17中，并且凹版辊11安装在压敏粘合剂托盘17的内部，使得凹版辊11能够在旋转的同时使其表面被水性压敏粘合剂CM涂布。
作为一个实例，水性压敏粘合剂CM的粘度可以为50cPs至70cPs(厘泊，g/cm s)。当粘度小于50cPs时，水性压敏粘合剂CM不能充分地涂布在凹版辊11上，并且流下来。当粘度大于70cPs时，水性压敏粘合剂CM不能充分地转印至凹版辊11上的涂膜16。
另外，水性压敏粘合剂CM可以通过凹版辊11的转速(rpm)通过调节胶乳的负载水平来形成。即，水性压敏粘合剂CM可以由包含的胶乳形成以提供粘性。
例如，当使用粘度计4(62目，30rpm)测量时，第一水性压敏粘合剂CM1的粘度为50cPs至70cPs，并且当使用水分计5测量时(TSC)，固体含量TSC为53％至55％。
作为另一实例，当使用粘度计4(62目，30rpm)测量时，第二水性压敏粘合剂CM2的粘度为100cPs，并且当使用水分计5测量时(TSC)，固体含量TSC为54％。
刮刀15可以从多种类型中选择后使用，以将水性压敏粘合剂CM从旋转的凹版辊11的表面刮除。在所述凹版涂布机测试装置中，提供多个刮刀15，并且可以根据水性压敏粘合剂CM的类型和涂布现象(即，涂层表面的均匀性和涂布的水性压敏粘合剂的量)选择性地使用。
图3是图2的侧视图。参照图1至图3，所述凹版涂布机测试装置中的控制器14控制凹版辊11的转速，以对涂膜16实现所需要的涂布速度。
控制器14控制电机13的驱动，以选择与水性压敏粘合剂CM对应的刮刀115。因此，尽管控制器14不意味着控制凹版涂布机中的电机13的控制器(未示出)，而是也可以通用。
在所述凹版涂布机测试装置中，红外分析仪3能够确认与从多个刮刀15中选择的刮刀15对应的水性压敏粘合剂CM的类型，以及涂布现象(即，涂层表面的均匀性和涂布的水性压敏粘合剂的量)。
作为一个实例，红外分析仪3向已经通过凹版辊11的表面的涂膜16照射红外线，并且接收从涂膜16的涂层表面反射后返回的信号，从而能够分析涂层表面。
作为检查控制器14中红外分析仪3的接收信号的结果，即，确认刮刀15与水性压敏粘合剂CM的类型之间的关系和涂布现象(即，涂层表面的均匀性和涂布的水性压敏粘合剂的量)，以能够从多个刮刀15中选择与水性压敏粘合剂CM对应的刮刀15。
在完成测试的凹版涂布机中，提供多个刮刀15，并且可以根据待使用的水性压敏粘合剂CM的类型和涂布现象(即，涂层表面的均匀性和涂布的水性压敏粘合剂CM的量)来实际选择和使用。
另外，根据一个实施方案的凹版涂布机测试装置还可以包括粘度计4或水分计5。粘度计4可以测量使用的水性压敏粘合剂CM的粘度。水分计5可以测量水性压敏粘合剂CM中的固体含量。即，固体含量是用于确认在涂膜16上涂布固形物之后固形物被干燥的状态下最终残留在涂膜16中的固体含量。
图4是示出刮刀与凹版辊接触的状态的放大部分的局部放大图。参照图2至图4，刮刀15具有交角θ。
交角θ由刮刀15的具有面向凹版辊11的旋转方向的弯曲表面的前端部的下表面的延长线L1与凹版辊11的外切线L2的交点形成。交角θ可以形成60°至120°。
交角(θ)可以抑制在通过刮刀15刮除凹版辊11的表面上的水性压敏粘合剂CM的过程中，由于凹版辊的高速旋转而引起涂布在凹版辊11的表面上的水性压敏粘合剂CM越过刮刀15的顶部并且残留的现象。即，交角θ抑制了涂布在除了图案凹槽之外的部分上的水性压敏粘合剂CM被较少刮除而越过刮刀15的顶部并且残留在凹版辊11的表面上的现象。
当交角θ小于60°时，刮刀15不能对凹版辊11的表面施压而是与凹版辊11过度柔韧地接触，使得刮刀15不能够以足够的力刮除凹版辊11的表面上的水性压敏粘合剂CM。在这种情况下，水性压敏粘合剂CM被较少刮除，并且会越过刮刀15的顶部而残留在凹版辊11的表面上。
当交角θ大于120°时，由于刮刀15倾向于从凹版辊11的表面和水性压敏粘合剂CM抬起，因此，刮刀15可能不能与凹版辊11的表面充分接触。即使在这种情况下，水性压敏粘合剂CM也会越过刮刀15的顶部而不被刮刀15刮除，并且会残留在凹版辊11的表面上。
通过凹版辊11的直径或转速以及水性压敏粘合剂CM的粘度，交角θ可以在60°至120°的范围内调节。即，交角θ通过适当地对凹版辊11的表面施压而在刮刀15可以有效地刮除具有粘性的水性压敏粘合剂CM的范围内调节，也可以根据刮刀15的材料和水性压敏粘合剂CM的粘度来调节。
作为一个实例，刮刀15包括：前端部151，其形成与凹版辊11形成交角θ的弯曲表面；和板形安装部152，其与前端部151连接并且在凹版辊11的长度方向上形成。
刮刀15设置在区域A1中，该区域A1形成在通过凹版辊11的中心的水平线与垂直线相交的下侧。因此，弯曲表面的前端部151以交角θ与凹版辊11接触，并且安装部152设置在区域A1内，该区域A1形成在水平线与垂直线相交的下侧。此外，区域A1和设置在区域A1中的刮刀15在实现本发明的效果的同时不需要用于安装凹版涂布机1所需要的附加空间。
所述凹版涂布机测试装置设计为小型，以能够进行实验室级别的测试，并且通过控制器2控制电机13，从而能够容易地调节与电机13连接的凹版辊11的转速。
由于所述凹版涂布机测试装置能够容易地更换刮刀15，因此，能够将刮刀15的结构应用于各种类型的胶乳的水性压敏粘合剂CM。此外，所述凹版涂布机测试装置通过使用红外分析仪3可以容易地确认涂布现象，即，根据涂布量的涂布性能。即，所述凹版涂布机测试装置能够容易地分析和确认涂布现象。
应用于凹版涂布机测试装置的凹版涂布机1被缩小并且配置为应用于大规模生产的实际凹版涂布机的尺寸的1/3。例如，当在大规模生产设备中将凹版辊的直径形成为60cm时，本实施方案中的凹版辊11的直径可以形成为20cm。
此时，可以根据大规模生产现场实施3倍的涂布速度。例如，当大规模生产现场的涂布速度为160rpm时，本实施方案的涂布速度可以为480rpm，为3倍。根据一个实施方案的控制器14可以通过电机13将凹版辊11的转速控制为0rpm至900rpm。
同时，在根据一个实施方案的凹版涂布机1通过所述凹版涂布机测试装置完成了对刮刀15的测试之后，可以将测试完成的刮刀15与水性压敏粘合剂CM之间的关系应用于实际大规模生产中并且使用。此时，凹版涂布机1可以通过应用测试与大规模生产之间的比例关系以适合大规模生产的比例制造得更大之后用于生产现场中。
将根据一个实施方案的刮刀15以120°的交角θ安装在凹版辊11上的凹版涂布机1与比较例的刮刀具有30°和120°的交角的情况进行比较。使用第一水性压敏粘合剂CM1和第二水性压敏粘合CM2。
此时，在凹版辊的涂布速度，即转速为400rpm并且涂布量为17μm的比较例中发生少量的渗出现象。相反，在凹版辊11的转速为400rpm并且涂布量为17μm的实施例中没有发生渗出现象。
参照表1，比较了在凹版辊11的转速为300、400、500和600rpm的情况下以17μm的涂布量涂布第一水性压敏粘合剂CM1和第二水性压敏粘合剂CM2的单位面积(cm2)中的渗出现象。
(表1)
Figure BDA0003875034850000081
使用第一水性压敏粘合剂CM1和第二水性压敏粘合剂CM2，并将凹版辊11的转速改变为300、400、500和600rpm，使得第一水性压敏粘合剂CM1和第二水性压敏粘合剂CM2以17μm的涂布量涂布在涂膜16上。
整体上，涂布现象，即，相对于涂布量的涂布性能表现得均匀。与比较例相比，当以400、500和600rpm涂布时，实施例中出现较少的渗出现象。因此，实施例可以有效地防止渗出现象。
可以看出，与实施例相比，在比较例中，由于凹版辊11的高速旋转使得第一水性压敏粘合剂CM1和第二水性压敏粘合剂CM2内的胶乳的物理键合降低，因此，涂布在凹版辊11上的第一水性压敏粘合剂CM1和第二水性压敏粘合剂CM2进一步流下来至凹版辊11的侧边。
虽然上面已经描述了本发明的优选实施方案，但是本发明不限于此，在权利要求书、本发明的说明书和附图的范围内，优选的实施方案可以以各种修改形式实施，并且显而易见的，这些各种修改形式也落入本发明的范围内。
(附图标记)
1：凹版涂布机 2：控制器
3：红外分析仪 4：粘度计
5：水分计 11：凹版辊
12：背辊 13：电机
15：刮刀 16：涂膜
17：压敏粘合剂托盘 111：驱动轴
151：前端部 152：安装部
A1：区域
CM：涂布材料(水性压敏粘合剂)
CM1、CM2：第一水性压敏粘合剂和第二水性压敏粘合剂
L1：延长线
L2：外切线 θ：交角

Claims (8)

1.一种凹版涂布机测试装置，包括：
彼此外接的凹版辊和背辊；
电机，该电机驱动部分地浸没在用于涂布的水性压敏粘合剂中的所述凹版辊；
控制器，该控制器调节所述电机的转速；
刮刀，该刮刀从多种类型中选择以将所述水性压敏粘合剂从旋转的所述凹版辊的表面刮除；和
红外分析仪，该红外分析仪能够确认与所选择的刮刀对应的水性压敏粘合剂的至少一种类型、涂层表面的均匀性和涂布的水性压敏粘合剂的量。
2.根据权利要求1所述的凹版涂布机测试装置，其中，
所述刮刀包括前端部，该前端部形成朝向所述凹版辊的旋转方向的弯曲表面。
3.根据权利要求2所述的凹版涂布机测试装置，其中，
所述刮刀的所述前端部的下表面的延长线与所述凹版辊的外切线形成60°至120°的交角。
4.根据权利要求1所述的凹版涂布机测试装置，其中，
所述水性压敏粘合剂的粘度为50cPs至70cPs(厘泊，g/cm s)。
5.根据权利要求1所述的凹版涂布机测试装置，还包括：
用于测量所述水性压敏粘合剂的粘度的粘度计；和
用于测量所述水性压敏粘合剂的固体含量的水分计。
6.一种凹版涂布机，包括：
彼此外接的凹版辊和背辊；
电机，该电机驱动部分地浸没在用于涂布的水性压敏粘合剂中的所述凹版辊；和
刮刀，该刮刀从多种类型中选择以将所述水性压敏粘合剂从旋转的所述凹版辊的表面刮除，使得填充在所述凹版辊的凹槽中的所述水性压敏粘合剂凹版印刷到在所述凹版辊与所述背辊之间行进的涂膜上。
7.根据权利要求6所述的凹版涂布机，其中，
所述刮刀包括前端部，该前端部形成朝向所述凹版辊的旋转方向的弯曲表面。
8.根据权利要求7所述的凹版涂布机，其中，
所述刮刀的所述前端部的下表面的延长线与所述凹版辊的外切线形成60°至120°的交角。
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