CN113994044A - 擦拭用片材以及该擦拭用片材的制造方法 - Google Patents

擦拭用片材以及该擦拭用片材的制造方法 Download PDF

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CN113994044A
CN113994044A CN202080043577.4A CN202080043577A CN113994044A CN 113994044 A CN113994044 A CN 113994044A CN 202080043577 A CN202080043577 A CN 202080043577A CN 113994044 A CN113994044 A CN 113994044A
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wiping sheet
nonwoven fabric
cnf
solution
pattern
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CN113994044B (zh
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山下晶子
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Daio Paper Corp
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    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
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    • D06N3/0011—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using non-woven fabrics
    • A—HUMAN NECESSITIES
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    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
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Abstract

本发明涉及擦拭用片材以及该擦拭用片材的制造方法。在擦拭用片材(P)的制造过程中，通过仅在无纺布的单面，对无纺布整体的大小的10％～60％的涂覆面积，以任意的图案喷射涂覆含有0.75％～2.00％的纤维素纳米纤维的精制水，并进行热风干燥，从而形成擦拭用片材(P)，该擦拭用片材(P)具备因图案部(1)而形成凹凸且具有厚度的擦拭性提高的面、和仅由非图案部(2)构成，平滑且柔软，并能够进行精擦拭的面。

Description

擦拭用片材以及该擦拭用片材的制造方法
技术领域
本发明涉及擦拭用片材以及该擦拭用片材的制造方法。
背景技术
用于在作为擦拭用片材的原料的无纺布形成图案部的方法，具有水刺法等在将网状纤维结合时形成的方法、在素色的无纺布进行热压花加工的方法等(参照专利文献1)。
专利文献1：日本特开2010-200860公报
但是，在水刺法中难以对无纺布利用图案部形成凹凸。另外，为了进行热压花加工，需要相应的设备。因此，期望容易地对无纺布利用图案部形成凹凸的方法。
发明内容
本发明的目的在于提供一种能够容易地在无纺布利用图案部形成凹凸的擦拭用片材以及该擦拭用片材的制造方法。
为了解决上述课题，技术方案1记载的发明是一种擦拭用片材，具备：图案部，在无纺布中含有纤维素纳米纤维；和非图案部，不含有上述纤维素纳米纤维。
技术方案2记载的发明，是在技术方案1记载的擦拭用片材的基础上，上述图案部的面积为无纺布整体的大小的10％～60％。
技术方案3记载的发明，是在技术方案1或2记载的擦拭用片材的基础上，仅在无纺布的单面形成有上述图案部。
技术方案4记载的发明是一种擦拭用片材的制造方法，具有：涂覆步骤，根据被设定的图案对无纺布涂覆0.75％～2.00％的纤维素纳米纤维溶液，从而形成图案部；和干燥步骤，使涂覆有纤维素纳米纤维溶液的无纺布热干燥。
技术方案5记载的发明，是在技术方案4记载的擦拭用片材的制造方法的基础上，在上述涂覆步骤中，对无纺布整体的大小的10％～60％的涂覆面积进行涂覆。
技术方案6记载的发明，是在技术方案4或5记载的擦拭用片材的制造方法的基础上，在上述涂覆步骤中，通过喷涂进行涂覆。
根据本发明，能够提供一种能够容易地在无纺布利用图案部形成凹凸的擦拭用片材以及该擦拭用片材的制造方法。
附图说明
图1是表示在实施方式所涉及的无纺布形成图案部的方法的一个例子的图。
图2A是表示实施方式所涉及的无纺布的图案部的一个例子的图。
图2B是表示实施方式所涉及的无纺布的图案部的一个例子的图。
图2C是表示实施方式所涉及的无纺布的图案部的一个例子的图。
图2D是表示实施方式所涉及的无纺布的图案部的一个例子的图。
图2E是表示实施方式所涉及的无纺布的图案部的一个例子的图。
图3是实施方式所涉及的擦拭用片材的制造方法的流程图。
具体实施方式
[擦拭用片材]
本发明所涉及的擦拭用片材P例如是对无纺布等片状的纤维集合基材的单面涂覆在精制水中添加了各种成分的溶液，并使其热干燥而成的。
如图1所示，擦拭用片材P例如具备在整个面中形成为格子点状的图案部1和作为其以外的部分的非图案部2。
图案部1含有纤维素纳米纤维(以下，CNF)，通过热收缩，纤维密度比非图案部2高。
非图案部2是不含有CNF的部分，与图案部1相比，纤维密度低。
图案部1通过热收缩而凹陷，因此擦拭用片材P利用图案部1和非图案部2形成凹凸。更具体而言，若涂覆了CNF的部分过热，则CNF溶液中的水蒸发，CNF彼此的氢键合变得更牢固，由此涂覆了CNF的部分的无纺布纤维凝结(收缩)，与非图案部2产生阶梯差。另一方面，例如，羧甲基纤维素(以下，CMC)与CNF相比，氢键合的数量不多，因此即使对无纺布涂覆CMC，该部分过热，无纺布纤维也不会凝结(收缩)，难以与非图案部2产生阶梯差。
此外，图案部1的形状、配置、朝向是任意的，只要是能够通过涂覆而形成的图案，则可以是任意的。
例如，如图2A所示，擦拭用片材P也可以是具备呈纵向的垂线状形成的图案部1和除此以外的非图案部2的形状。另外，图案部1也可以如图2B所示为斜格子点状，也可以如图2C所示为横向的垂线状。另外，也可以如图2D所示为直线波形状，也可以如图2E所示为斜线状。
另外，此时，为了对擦拭用片材P整体赋予适度的凹凸感，优选以图案部1的面积成为无纺布整体的大小的10～60％的方式涂覆CNF溶液。这是因为，在图案部1的面积小于10％的情况下，凹凸少，无法发挥擦拭性、刮去性。另外，这是因为在图案部1的面积大于60％的情况下，图案部1变多，柔软度受损。
擦拭用片材P在产品形态中，为层叠多张的层叠体的状态，能够收容于具有可由开闭盖密闭的片材取出口的密闭容器、袋等包装单元内。
在使用时，由于将擦拭用片材P直接放入容器或袋内，或者将直接放入有擦拭用片材P的袋放入容器内，因此使用者打开取出口并将内部的片材拉出来使用。
该擦拭用片材P例如用于身体擦拭片、地板等清扫用片材等广泛的用途。
[纤维集合基材]
作为纤维集合基材，能够使用以规定的纤维为纤维材料，并通过例如水刺、热风、气流成网、点粘、纺粘、针刺等公知的技术而被制造的无纺布。
作为规定的纤维，无论天然、再生、合成都能够使用，例如可列举人造丝、莱赛尔、天丝、棉等纤维素系纤维、聚乙烯、聚丙烯、聚乙烯醇等聚烯烃系纤维、聚对苯二甲酸乙二醇酯、聚对苯二甲酸丁二醇酯等聚酯纤维、尼龙等聚酰胺系纤维。它们能够单独使用，或者组合两种以上使用。
在本发明中，优选至少含有亲水性纤维。这是因为，擦拭用片材P是含有亲水性纤维的无纺布，与是不含亲水性纤维的无纺布相比，对污垢的擦拭效果高。
(亲水性纤维)
作为亲水性纤维，能够使用棉、纸浆等天然纤维、人造丝、铜氨纤维等再生纤维等。在这些纤维中，特别优选为人造丝。人造丝富有吸水性，操作容易，并且能够廉价地获得一定长度的纤维。该亲水性纤维更优选在基材中以40～70质量％的含有比调配。在亲水性纤维的含量小于40质量％的情况下，不能赋予充分的柔软度和保水性，在超过70质量％的情况下，湿润时强度过低而容易产生破损等，并且在从容器以弹出式取出时过度产生伸长。
(单位面积重量)
在本发明的擦拭用片材P的情况下，片材的单位面积重量优选为20～80g/m2，特别优选为30～60g/m2左右。在片材的单位面积重量小于20g/m2时，缺乏对污垢的保持能力，若超过80g/m2，则缺乏柔软度。
[CNF]
CNF是具有保持水分的特性且安全性高的材料，是将纸浆纤维解纤而得到的微细的纤维素纤维，通常是指含有纤维宽度为纳米尺寸(1nm以上且1000nm以下)的纤维素微细纤维的纤维素纤维，但优选为平均纤维宽度为100nm以下的微细纤维。平均纤维宽度的计算例如使用一定数量的平均数、中位数、众数粒径(众数值)等。
(能够用于CNF的纸浆纤维)
作为能够用作CNF的纸浆纤维，例如可列举阔叶木浆(LBKP)、针叶木浆(NBKP)等化学纸浆、漂白热磨机械浆(BTMP)、石磨木浆(SGP)、加压石磨浆(PGW)、精炼磨浆(RGP)、化学磨浆(CGP)、热磨浆(TGP)、磨制浆(GP)、热磨机械浆(TMP)、化学热磨机械浆(CTMP)、精磨机械浆(RMP)等机械纸浆、由茶废纸、牛皮纸信封废纸、杂志废纸、报纸废纸、传单废纸、办公废纸、瓦楞纸废纸、纯白废纸、肯特废纸、仿造废纸、契据废纸、更新废纸等制造的废纸纸浆、将废纸纸浆进行脱墨处理后的脱墨纸浆(DIP)等。只要不损害本发明的效果，它们可以单独使用，也可以组合多种使用。
(解纤方法)
作为CNF的制造中使用的解纤方法，例如可列举高压均质器法、微流化器法、研磨机磨碎法、珠磨机冷冻粉碎法、超声波解纤法等机械方法，但并不限定于这些方法。
此外，通过上述解纤方法等仅实施了机械处理(未改性)的CNF，即官能团未修饰的CNF相对于磷酸基、羧甲基等官能团修饰后的CNF，热稳定性高，因此能够用于更广泛的用途，但也能够将磷酸基、羧甲基等官能团修饰后的CNF用于本发明。
另外，例如，针对对纸浆纤维实施了机械方法的解纤处理后的纤维，可以实施羧甲基化等化学处理，也可以实施酶处理。作为实施了化学处理的CNF，例如可列举TEMPO氧化CNF、磷酸酯化CNF、亚磷酸酯化CNF等直径为3～4nm的iCNF(individualized CNF)(单纳米纤维素)。
另外，也可以是仅实施了化学处理、酶处理的CNF，或者对实施了化学处理、酶处理的CNF实施了机械方法的解纤处理的CNF。
[CMC]
此外，为了防止CNF在溶液中的凝结，也可以添加作为水溶性高分子的CMC。
在将CNF添加于水系溶剂的情况下，CNF的微原纤纤维彼此结合并凝结，添加CMC而使CNF与CMC共存，由此CNF的OH基和CMC的OH基氢键合，利用分子链的静电相互作用和空间位阻效应，防止CNF的凝结，从而能够使CNF在溶液中均匀地分散。
此外，CMC以纤维素为原料而得到，具有缓慢的生物降解性，且使用后能够焚烧废弃，因此是对环境极为友好的材料，所以优选使用，但只要是能够防止CNF在溶液中的凝结的材料，则也可以使用CMC以外的水溶性高分子。
另外，在添加CMC的情况下，在将溶液整体设为100.000质量％时，优选以水为93.000～99.790质量％、CNF为0.002～0.020质量％、以及CMC为0.100～1.000质量％的比例含有它们。
另外，溶液相对于纤维集合基材的干燥重量能够在100～500质量％的范围内浸渍，但优选以200～350质量％浸渍。
实施例
以下，通过实施例以及图3所示的擦拭用片材P的制造方法的流程图对本发明具体地进行说明，但本发明并不限定于这些。
[样品制作]
首先，准备在干燥状态下称量70g/m2的11cm×11cm的无纺布(纤维配合；人造丝：PET＝50：50)。干燥状态是指没有将药液等液体浸渍片材的状态。
接着，仅对上述无纺布的单面，在实施例1-13以及比较例1-10的条件下涂覆溶液(步骤S1)。
接着，在60℃恒温槽中将各无纺布静置一天，使其热干燥(步骤S2)，制作擦拭用片材P。
实施例1-13以及比较例1-10的条件如下。
(实施例1-4)
如图1所示，以使直径为2～3mm，相互分离10～15mm的方式，利用微量移液管(Nichipet EXII00-NPX2-1000)分别以点状涂覆浓度为0.75％、1.00％、1.50％、2.00％的机械处理CNF溶液。例如，0.75％CNF溶液是指溶剂的水：CNF＝99.25％：0.75％的溶液。
(实施例5-8)
分别涂覆浓度为0.75％、1.00％、1.50％、2.00％的酶处理CNF溶液。
其他条件与实施例1相同。
(实施例9-11)
分别涂覆浓度为0.75％、1.00％、1.50％的TEMPO氧化CNF溶液。
其他条件与实施例1相同。
(实施例12-13)
分别涂覆浓度为0.75％、1.00％的ELLEX-☆溶液(亚磷酸酯化CNF水分散液)。
其他条件与实施例1相同。
(比较例1)
涂覆浓度为0.50％的机械处理CNF溶液。
其他条件与实施例1相同。
(比较例2)
涂覆浓度为0.50％的酶处理CNF溶液。
其他条件与实施例1相同。
(比较例3)
涂覆浓度为0.50％的TEMPO氧化CNF溶液。
其他条件与实施例1相同。
(比较例4)
涂覆浓度为0.50％的ELLEX-☆溶液。
其他条件与实施例1相同。
(比较例5-9)
分别涂覆浓度为0.50％、0.75％、1.00％、1.50％、2.00％的CMC溶液。
其他条件与实施例1相同。
(比较例10)
涂覆精制水。
其他条件与实施例1相同。
使用上述实施例以及比较例的片材，进行以下的试验1-5。
[试验1.机械处理CNF溶液的浓度和凹凸的有无以及无纺布的柔软度的研究]
针对与实施例1-4以及比较例1对应的样品，进行以下的两个试验。
[评价方法]
(凹凸的官能评价)
使10名被试验者对实施例及比较例的样品进行比较后，对凹凸的有无进行评价。
试验结果：10人中7人以上回答为有凹凸的情况为〇，10人中7人以上回答为没有凹凸的情况为×，除此以外为△。
(柔软度的官能评价)
使10名被试验者对实施例及比较例的样品进行比较后，对柔软度进行评价。
试验结果：10人中7人以上回答为与没有涂覆CNF的无纺布同等以上的柔软度的情况为〇，10人中7人以上回答为比没有涂覆CNF的无纺布硬的情况为×，除此以外为△。
试验的结果如表1所示。
[表1]
表1
Figure BDA0003409440390000081
[评价]
将表1的实施例1-4与比较例1分别进行比较，可知：在机械处理CNF溶液中，若涂覆浓度为0.75～2.00％，更优选为0.75～1.50％的溶液，则能够兼得凹凸的形成和片材P的柔软度。
[试验2.酶处理CNF溶液的浓度和凹凸的有无以及无纺布的柔软度的研究]
接下来，针对与实施例5-8以及比较例2对应的样品，进行与试验1相同的试验的结果如表2所示。
[表2]
表2
Figure BDA0003409440390000082
[评价]
将表2的实施例5-8与比较例2分别进行比较，可知：在酶处理CNF中，若涂覆浓度为0.75～2.00％，更优选为1.00～1.50％的溶液，则也能够兼得凹凸的形成和片材P的柔软度。
[试验3.TEMPO氧化CNF溶液的浓度和凹凸的有无以及无纺布的柔软度的研究]
接下来，针对与实施例9-11以及比较例3对应的样品，进行与试验1相同的试验的结果如表3所示。
[表3]
表3
Figure BDA0003409440390000091
[评价]
将表3的实施例9-11与比较例3分别进行比较，可知：在TEMPO氧化CNF溶液中，若涂覆浓度为0.75～1.50％，更优选为1.50％的溶液，则也能够兼得凹凸的形成和片材P的柔软度。
[试验4.ELLEX-☆溶液的浓度和凹凸的有无以及无纺布的柔软度的研究]
接下来，针对与实施例12-13以及比较例4对应的样品，进行与试验1相同的试验的结果如表4所示。
[表4]
表4
Figure BDA0003409440390000092
[评价]
将表4的实施例12-13与比较例4分别进行比较，可知：在ELLEX-☆溶液中，若涂覆浓度为0.75～1.00％的溶液，则也能够兼得凹凸的形成和片材P的柔软度。
[试验5.涂覆不含有CNF的液体的情况下的凹凸的有无的研究]
接下来，针对与比较例5-10对应的样品，进行与试验1相同的试验的结果如表5所示。
[表5]
表5
Figure BDA0003409440390000101
[评价]
根据表5的比较例5-10可知：在涂覆不含有CNF的液体的情况下，即使进行热干燥也不会形成凹凸。
以上，由试验1-5可知：根据本实施方式，通过在无纺布涂覆浓度为0.75～2.00％，更优选为0.75～1.50％的CNF溶液并使其热干燥，从而能够确保凹凸的形成和柔软度。
另外，由试验1-4可知：涂覆的溶液所含的CNF可以利用任意的方法被解纤。
[实施方式的效果]
在擦拭用片材P的制造工序中，通过在没有花纹的无纺布涂覆含有CNF的溶液并使其热干燥，从而能够容易地利用图案部形成凹凸。
另外，仅在无纺布的单面形成有图案部1，由此能够在利用赋予了厚度感并增加了接触面积的CNF溶液涂覆面擦拭污垢后，利用平滑且柔软的CNF溶液非涂覆面进行精擦拭，对于一张擦拭用片材P，能够获得两种效果。
以上，基于实施方式对本发明具体地进行了说明，但本发明不限定于上述实施方式，能够在不脱离其主旨的范围内进行变更。
例如，在上述实施方式中，说明了擦拭用片材P用于清扫的情况，但其用途不限定于此。另外，当然可以根据用途，变更溶液中添加的成分、涂覆的图案。
另外，本发明中的无纺布对制法、组成、单位面积重量没有特别限制。另外，基于上述实施方式形成的凹凸即使在湿的状态下也不会崩溃，因此根据用途，片材是干性还是湿性也没有限定。
另外，作为向无纺布涂覆CNF的方法，从能够均匀地涂覆的方面等出发，优选为喷射涂覆，但只要不损害本发明的效果，也可以是利用分配器等的液滴状的涂覆、对辊涂覆一次溶液并使其与片材面接触来进行涂覆的辊涂、使用柔性印刷机、凹版印刷机等的辊转印等其他方法。
另外，作为无纺布的热干燥方法，从干燥时间短、能够廉价地导入的方面等出发，优选为热风干燥，但只要不损害本发明的效果，也可以单独或根据需要组合使用其他方法，例如使杨克转鼓等加热辊的表面直接与无纺布接触来使其干燥的方法等。
对本发明的几个实施方式进行了说明，但本发明的范围不限定于上述实施方式，包括权利要求书中记载的发明的范围及其均等的范围。
工业上的利用可能性
本发明能够利用于能够容易地在无纺布利用图案部形成凹凸的擦拭用片材以及该擦拭用片材的制造方法。
附图标记说明
P…擦拭用片材；1…图案部；2…非图案部。

Claims (6)

1.一种擦拭用片材，其中，具备：
图案部，在无纺布中含有纤维素纳米纤维；和
非图案部，不含有所述纤维素纳米纤维。
2.根据权利要求1所述的擦拭用片材，其中，
所述图案部的面积是无纺布整体的大小的10％～60％。
3.根据权利要求1或2所述的擦拭用片材，其中，
仅在无纺布的单面形成有所述图案部。
4.一种擦拭用片材的制造方法，其中，具有：
涂覆步骤，根据被设定的图案对无纺布涂覆0.75％～2.00％的纤维素纳米纤维溶液，从而形成图案部；和
干燥步骤，使涂覆有纤维素纳米纤维溶液的无纺布热干燥。
5.根据权利要求4所述的擦拭用片材的制造方法，其中，
在所述涂覆步骤中，对无纺布整体的大小的10％～60％的涂覆面积进行涂覆。
6.根据权利要求4或5所述的擦拭用片材的制造方法，其中，
在所述涂覆步骤中，通过喷涂进行涂覆。
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JP2014076653A (ja) * 2012-09-20 2014-05-01 National Printing Bureau セルロース微小繊維によって印刷した印刷物及び作製方法
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