CN1289734C - 水解性无纺布和采用该布的清洁用物品 - Google Patents
水解性无纺布和采用该布的清洁用物品 Download PDFInfo
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- CN1289734C CN1289734C CNB99100678XA CN99100678A CN1289734C CN 1289734 C CN1289734 C CN 1289734C CN B99100678X A CNB99100678X A CN B99100678XA CN 99100678 A CN99100678 A CN 99100678A CN 1289734 C CN1289734 C CN 1289734C
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- Prior art keywords
- water
- woven fabric
- fibre
- disintegratable non
- disintegrable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
本发明在于获得一种下述的水解性纤维片,其即使在包含一定量水的湿润状态下,水解性和强度仍很好,并且当与大量的水相接触时,很容易分散。一种水解性无纺布,其特征在于在下述纤维片中包含水溶性或水膨润性的粘接剂,该纤维片是在对由水分散性的纤维形成的纤维网通过喷水处理,形成纤维密度较高的部分,以及纤维密度较低的部分,从而体积产生膨松,并且湿润时的断裂强度小于100g/25mm,该水解性无纺布具有优良的水解性和强度。另外,采用上述水解性无纺布的清洁用物品的体积膨松,其表面具有凹凸部,擦拭效果优良。
Description
技术领域
本发明涉及因水流而很容易分散的水解性无纺布,以及采用该水解性无纺布的清洁用物品。更具体地说,本发明涉及水解性和湿润度优良的、体积可膨胀的水解性无纺布,以及采用该无纺布的具有较高擦拭效果的水解性清洁用物品。
背景技术
在擦拭人体臀部等皮肉的清洁作业时,或为了清扫厕所周边,人们采用清洁用纤维片。该纤维片最好采用具有水解性的类型,以便可在使用之后,在保持其原样的状态下,在厕所中冲掉。但是,在采用厕所等冲掉的情况下,如果其水解性不好,则为了分散于净化槽中,需花费较多的时间,从而会造成厕所等排水沟堵塞的危险性。
另外,多数情况下,清洁作业或擦拭作业所采用的一次性的清洁用纤维片是按照下述方式进行销售的,该方式为:从简便或作业效果的观点来看,在通过清洁液等预先弄湿的状态下,将其包装。但是,这些纤维片必需具有足够的强度,该强度可承受在浸渍清洁化学溶液等的状态下所进行的擦拭作业,并且在厕所中冲掉时,必需发生水解。
作为这种水解性的清洁用物品,JP特公平7_24636号文献公开了一种水解性清洁用品,其包括具有羧基的水溶性粘接剂、金属离子和有机溶剂。该清洁用品在使用时具有规定的强度,另外其在冲水厕所中流动时,粘接剂发生溶解,从而很容易分散于水中。但是,由于构成该清扫用部件的纤维片为水解纸,所以纤维的密度较高。因此,其难于呈现体积膨松感,从而不能产生柔软感。
JP特开平9_228214号文献公开了一种水破坏性无纺布,其是通过高压水射流处理,使长度在4~20mm的范围内的纤维与经打浆处理的纸浆在混合之后,实现混杂交络在一起。由于其为无纺布,它与以水解纸为主体的类型相比较,可呈现体积膨松感。但是,该无纺布通过高压水射流,使纤维混杂交络在一起,通过上述混杂,会产生较高的湿润强度。因此,在通过冲刷厕所中流动时,难于实现体积膨松、一定的润湿强度和水解性的平衡。
发明内容
本发明的目的在于提供一种水解性无纺布,其水解性较好,另外使用时的湿润强度较高,此外具有体积膨松感,从而具有柔软感。
本发明的另一目的在于提供一种水解性的清洁用物品,其采用水解性优良的体积膨松的无纺布,而且擦拭效果优良。
本发明的上述目的和优点是通过下述的水解性无纺布来实现的,在下述纤维片中包含水溶性或水膨润性的粘接剂,该纤维片是在对由水分散性的纤维形成的纤维网进行喷水处理,形成纤维密度较高的部分,以及纤维密度较低的部分,从而使体积产生膨松,并且湿润时的断裂强度小于100g/25mm。
此外,如果采用上述的水解性无纺布,可获得下述的水解性清洁用物品,其体积膨松,具有柔软感,并且擦拭效果优良。
本发明采用的是对水具有良好分散性的纤维。这里所称的对水的分散性,与水解性的含义是相同的,其是指通过与大量的水相接触,实现细分的性质。采用这样的纤维制造无纺布,另外含有将纤维之间粘接的粘接剂的水解性无纺布在进行擦拭作业时,具有较高的湿润强度,而在与大量的水相接触时,粘接剂发生溶解,或发生膨胀,从而纤维的粘接脱开,呈现构成纤维片的原始纤维的形状,从而发生损坏。
作为本发明所采用的纤维,可为化学纤维或天然纤维中的任何一种或两种纤维。作为化学纤维,可包括有作为再生纤维的人造纤维或醋酸酯、及作为合成纤维的聚丙烯等、作为天然纤维的可以是针叶树纸浆或阔叶树纸浆等木材浆、马尼拉麻、维纸浆棉短绒纤、竹纸浆、洋麻等。另外,还可以这些成分为主体,并包括棉花等的天然纤维、由聚丙烯、聚乙烯醇、聚酯或聚丙烯腈、尼龙等合成纤维、聚乙烯等形成的合成浆和含玻璃丝的无机纤维等。
即使在这些纤维中,最好包括天然纤维或作为再生纤维的人造纤维。人造纤维的水分散性较好,另外具有生物分解性。
此外,更优选针叶树纸浆等天然纤维与人造纤维一起配合使用。这是因为针叶树纸浆的分散性较好。由于针叶树纸浆的平均纤维长度较短,在1.0~4.5mm的范围内,这样在与大量的水相接触时,针叶树纸浆便形成崩解剂,从而很容易使水解性无纺布崩解。作为纸浆,更优选其加拿大标准游离度(CSF:Canadian Standard Freeness。J I S P8121的测定值)在400~750cc的范围内。如果采用CSF小于400cc的纤维,即抽吸浆的打浆体后的纤维,则无纺布的手感较差。此外,最好上述CSF在500~750cc的范围内。还有,作为针叶树纸浆,一般采用针叶树漂白牛皮纸浆。
最好构成纤维网的人造纤维等的纤维长度7mm以下。纤维长度7mm以下,当对纤维网进行喷水处理时,由于纤维并未大量地混杂交络在一起,纤维中未混杂在一起的部分较宽,或由于纤维适度地卷绕在一起,这样水解性才好。虽然未规定纤维长度的下限,但是只要可形成纤维片,则纤维长度进一步缩短也可以。
但是,在掺合有纤维长度较短的纤维,比如针叶树纸浆的情形下,还可同时掺入纤维长度10mm以下的人造纤维等纤维。此时,最好纤维长度为10mm的人造纤维等纤维的掺合率在70%以下,针叶树纸浆等纤维长度较短的纤维的掺合率在30%以上。当纤维长度为10mm的人造纤维等纤维的掺合率在70%以上时,无纺布的水解性显著降低。顺便说一下,在同时掺合人造纤维和针叶树纸浆的情形下,如果人造纤维的纤维长度7mm以下,则针叶树纸浆的掺合率也可为任意的程度。然而,即使在该情形下,最好人造纤维的掺合率为70%,针叶树纸浆的掺合率为30%。
另外,当人造纤维的纤维长度在7~10mm的范围内时,最好人造纤维的纤维度为0.5denier。当小于0.5denier时,由于通过喷水处理,人造纤维的混杂交络程度增加,难以分散于水中,从而水解性降低。
在本发明中,最好纤维的单位面积重量(目付)在20~100g/m2的范围内。如果上述单位面积重量小于上述下限,当无纺布作为擦拭作业用片时,无法获得必要的强度。如果上述单位面积重量大于上述上限,则无纺布的柔软性较差。另外,纤维在水中难于分散,水解性也很差。在将本发明的水解性无纺布用作清洁用物品的场合,从片的强度、污物的擦拭效果和在接触时所感觉的柔软感较好的方面来说,上述纤维的单位面积重量特别是最好在30~80g/m2的范围内。
将本发明的无纺布通过湿式法,形成纤维网之后,对该纤维网进行喷水处理,从而形成纤维片。在这里,纤维网呈纤维方向沿某一方向的纤维块的片状。在该喷水处理中,一般采用的是高压水射流处理装置。
附图说明
图1A表示本发明的纤维片的局部放大平面图;
图1B表示纤维片剖面图。
1是去除了纤维的区域,3是纤维稀疏的区域,4是纤维密度高的区域。
图1A为放大平面图,该图表示将进行了喷水处理的纤维片放大后的示意性结构,图1B为其剖面图。在喷水处理时,通过高压水射流处理装置,提供喷水流。此时,在网眼(孔)的部分,通过水流形成纤维去除的区域1,构成该部分的纤维密度较低的区域3。另外,形成除了上述区域1以外的纤维聚集的部分,其构成纤维密度较高的区域4。按照上述方式,由于形成纤维密度较低的区域3和纤维密度较高的区域4,这样可获得下述的水解性无纺布,其整体的体积产生膨松,具有更加接近布的柔软感。此外,如果纤维的长度10mm以下,或7mm以下,则通过喷水处理而造成的纤维的混杂交络程度较差。具体来说,在纤维密度较高的区域4,纤维未混杂交络的部分较多,另外在标记5所示的区域,很少纤维混杂交络或缠绕。因此,形成水解性优良的部件。
具体实施方式
下面对喷水处理进行具体描述,将纤维网放置于连续移动的传送器上,按照从该纤维网的外面穿过其内面的方式,喷射高压喷水流。在该喷水处理中,根据纤维网的单位面积重量、喷嘴的孔径、喷嘴的孔数、对纤维网进行处理时的通过速度(处理速度)等而得知无纺布的性质会发生变化。最好进行对纤维网的单面处理一次的作功量在0.05~0.5(kW/m2)范围内的喷水处理,该作功量是根据下述公式计算出的,该公式为:
作功量(kW/m2)=(1.63×喷射压力(kg/cm)×喷射流量(m3/min))÷处理速度(m/min)
当大于上述范围的上限时,纤维过于缠绕,水解性下降,另外具有纤维网损坏的可能性。此外,当小于上述范围的下限时,纤维网膨胀性较差。该喷水处理可仅仅在纤维网的单面,或双面进行。
还有,在形成纤维网之后,最好在纤维网不干燥的情况下,进行喷水处理。再有,在一旦对纤维网进行干燥之后,还可进行喷水处理。
最好按照上述方式获得的纤维片中的,处于含有水的状态下湿润时的断裂强度在纤维片的纵向(MD:Machine Direction)和横向(CD:CrossDirection)均小于100g/25mm。该纤维片的湿润强度为不含有粘接剂时的值。湿润时的断裂强度(下面称为“湿润强度”)是指按照宽度为25mm,长度为150mm的尺寸切割下来的纤维片,浸渍为其重量的2.5倍的水,通过万能拉力试验机,检测间距为100mm,张拉速度为100mm/min进行测定时的断裂时的拉力(gf)。此为完全按照该测定方法的大致标准,其可具有实质上与湿润强度相同的强度。
另外,按照上述方式获得的纤维片的水解性最好100秒以下。此时的水解性也为在纤维片不包括粘接剂的状态下进行测定的值。此时的水解性是指按照J I S P4501的卫生纸分解容易度试验而测定的水解性。下面对分解容易度试验的主要内容进行描述,将按照长度为10cm,宽度为10cm的尺寸切割的作为测定对象物的纤维片投入到加入有离子交换水300ml的容量为300ml烧杯中,采用旋转件进行搅拌。转数为600rpm。经过一定的时间,通过眼睛对此时的水解性无纺布的分散状态进行观察,测定水解性无纺布被分散到很微小的程度时的时间。此时间为完全按该测定方法的大致标准,其可为具有实质上与水解性相同的水解性的值。另外,即使在水解性超过100秒的情况下,如为120秒左右时,对使用方法来说不会产生影响。另外,包含粘接剂时的水解性无纺布的水解性最好小于120秒。
还有,最好按照上述方式获得的纤维片的纤维密度在0.3g/cm3以下。再有,其下限为0.05g/cm3。通过对纤维网进行喷水处理,如图1所示,便形成纤维密度较低的区域3,以及纤维聚集的密度较高的区域4,其整体的纤维密度较低,由此可获得接近于布的柔软感。
使具有以上的湿润强度和水解性的,通过水的分解性良好的纤维片含有粘接剂,这样便可获得使用时强度较高的本发明的水解性无纺布。
将纤维与纤维粘接的水溶性或水膨胀性的粘接剂最好采用下述一组成分中选择出的一种或二种以上的化合物,该组成分包括羧甲基纤维素、烷基纤维素、聚乙烯醇、改性聚乙烯醇。通过使纤维片包含该粘接剂,可增加湿润强度。另外,由于粘接剂具有水溶性或水膨胀性,所以在与大量的水相接触时,会溶解或分散开。此时,由于纤维片具有优良的水解性,使其可在短时间内分散于水中。
在这里,羧甲基纤维素可作为具有水溶性或水膨胀性的典型。另外,烷基纤维素为纤维素中的葡萄糖环单位中的羟基被烷基取代的化合物。烷基纤维素可包括比如,甲基纤维素、乙基纤维素、苯甲基纤维素等。其中,从水解性和强度良好的方面来说,特别是最好采用甲基纤维素。另外,改性聚乙烯醇为具有规定量的磺酸基或羧基的乙烯醇系聚合物。
为了使纤维片含有粘接剂,如果是水溶性的粘接剂,可采用比如丝网印刷等的涂敷方法。另外,如果粘接剂为具有水膨胀性的羧甲基纤维素等水膨胀性粘接剂,则可通过在制作纤维网时,对粘接剂进行混入处理,而使其包含于纤维片中。
最好当纤维的重量为100g时,该粘接剂的量(涂敷量)在0.5~30g的范围内。当上述量小于上述下限时,纤维片的湿润强度较低。另外,当上述量大于上述上限时,由于无纺布变硬,柔软感较差,这样使用手感较差。此外,水解性也较低。
按照上述方式,最好包含粘接剂的水解性无纺布的湿润强度沿MD、CD均250g/25mm以上。但是,即使为低于作为此目标的湿润强度的情况下,还可通过包含电解质的方式来提高无纺布的湿润强度。
电解质可采用无机盐和有机盐中的一者或两者。无机盐可包括硫酸钠、硫酸钾、硫酸锌、硝酸锌、钾明矾、氯化钠、硫酸铝、硫酸镁、氯化钾、碳酸钠、碳酸氢钠、碳酸铵等。另外,有机盐包括吡咯烷酮羧酸钠、柠檬酸钠、柠檬酸钾、酒石酸钾、酒石酸钠、乳酸钠、琥珀酸钠、泛酸钙、乳酸钙、月桂基硫酸钠等。在粘接剂采用羧甲基纤维素的情况下,从提高水解性无纺布的强度方面来说,最好采用二价盐。另外,在粘接剂采用烷基纤维素的情况下,最好采用一价盐。另外,在粘接剂采用聚乙烯醇或改性聚乙烯醇的情况下,最好采用一价盐。
为了使水解性无纺布包含电解质,可使该电解质溶解于水中,从而使该水溶液浸渗于纤维片中。因此,最好电解质具有水溶性。此时,最好浸渗于水解性无纺布中的水溶液中的电解质的浓度按重量百分比计在0.5~10%的范围内。其中以按重量百分比计在1.0~5.0%的范围为最佳。最好将200~250g的溶解有该电解质的水溶液浸渗于100g的水解性无纺布中。电解质的含量越高,水解性无纺布的强度提高越大。但是,在电解质采用硫酸钠,并且水解性无纺布用于人体肌肤等的场合,最好硫酸钠的含量较少,以便不会对人体肌肤产生刺激。将水溶液浸渗于水解性无纺布中的方法可通过浸渍或喷雾的方式进行。
按照上述方式,通过使本发明的无纺布含有粘接剂和电解质,便可获得湿润强度(MD或CD)为250g/25mm的水解性的无纺布。
另外,最好所获得的水解性无纺布的水解性120秒以下。其中以100秒以下为最佳。
按照上述方式所获得的水解性无纺布即使在具有一定的水分,比如包含2~2.5倍纤维重量的水分的状态下,仍具有耐受擦拭作业的湿润强度。因此,所获得的水解性无纺布具有作为下述清洁用物品所必需的强度和水解性,该清洁用物品可用于婴儿臀部的擦拭等进行身体的清洁和清扫等擦拭作业等。
该清洁部件用于擦拭污物等的效果较好。由于水解性无纺布形成有纤维密度较高的部分,以及纤维密度较低的部分,该密度是造成污物很容易保持于该部分上的原因。当擦拭含有水分的污物时,上述情况会进一步发挥其效果。另外,本发明的水解性无纺布可通过喷水处理而形成凹凸部,可在该部分上俘获较多的污物。该凹凸部分对于俘获没有水分的灰尘等污物是优选的。因此,当采用本发明的清洁用物品时,可以相对地以较以往更少的劳力进行擦拭作业。
该清洁用物品即使在浸渗有清洁用化学溶液的情况下,仍不会发生下述情况,该情况指因该清洁用化学溶液,使湿润强度降低,形状发生破坏。另外,该清洁用物品在使用完毕后,当在厕所等中被冲掉,与大量的水相接触时,很容易分散。
采用本发明的水解性无纺布的清洁用物品也可包含下述有机溶剂,该有机溶剂具有在擦拭作业过程中去掉污物的效果,或作为保湿剂的效果。在该有机溶剂中,最好采用丙三醇等多元醇。其原因是这样可提高水解性无纺布的强度。
此外,在粘接剂采用烷基纤维素的场合,还可包括下述的化合物,以便提高水解性无纺布的强度。比如,可包括(甲基)丙烯酸顺丁烯二酸系树脂,(甲基)丙烯酸反丁烯二酸系树脂等的聚合性化合物、可与其共聚的化合物的共聚物。该共聚物最好采用对氢氧化钠等作用,使其产生碱化反应,局部地形成羧酸钠盐的化合物。另外,最好其包含三甲基甘氨酸等的氨基酸衍生物。
还有,在采用本发明的水解性无纺布的清洁用物品中在不妨碍本发明的效果的情况下还可包括其它的物质。比如,包括表面活性剂、杀菌剂、防腐剂、除臭剂、保湿剂、酒精等。
本发明的水解性无纺布可在含有水分的状态下保管。即使在这样的状态下,水解性无纺布的水解性和湿润强度等性质很少发生变化。
本发明的水解性无纺布可用作擦拭臀部等人体肌肤的湿卫生纸,另外可用于清扫厕所周围等场合。在将本发明的水解性无纺布作为预先弄湿的制品而包装的场合,纤维片可按照不会干燥的方式进行密封包装而出售。
另,本发明的水解性无纺布也可在干燥的状态下出售。比如,也可使纤维片包含粘接剂,将干燥的水解性无纺布在使用时浸渍水或溶解有电解质的化学溶液后来使用。此外,还可比如使纤维片包含粘接剂,在浸渗溶解有电解质的水溶液之后,将干燥后的水解性无纺布在使用时浸渗水中或化学溶液后来使用。
下面通过实施例对本发明进行更具体的描述,但是本发明并不限于这些实施例。
实施例A
对下述纤维片进行试验,该纤维片为本发明的水解性无纺布的主体,不包括粘接剂。
作为原料纤维,采用表1所示的纤维长度,维度为1.5denier的人造纤维(东邦レ——ョン(株)生产),对其按照0.2%的浓度,通过实验室搅混,借助塑料丝进行造纸作业,从而制成尺寸为25cm×25cm,单位面积重量为40g/m2的纤维网。在不对其进行干燥的情况下,在其叠置于塑料丝上的状态下,将其放置于传送器上,在按照30m/min的速度,对纤维网进行传送的同时,对其进行喷水处理,使纤维卷绕起来。在此时所采用的高压水射流喷射装置中,孔径为95微米的喷嘴孔的间距为0.5mm,该孔并排有2000个/m,该喷嘴孔按照水压为30kg/cm2,从纤维网的外面朝向内面穿过的方式进行喷射。处理速度为30m/min。此后,按照相同方式再进行一次喷射,从而实现2次喷射。此后,采用热风式干燥机,对其进行干燥,从而形成纤维片。将250g的离子交换水浸渍于100g的纤维片中。对所获得的纤维片,按照下面所述的方法进行水解性和湿润强度的试验。
水解性的试验是根据J I S P4501的卫生纸分解容易度的试验进行的。具体来说,将水解性的无纺布按照长度为10cm,宽度为10cm的尺寸切割,将上述切割形成的部件放入含有离子交换水300ml的容量为300ml的烧杯内,通过旋转件对其进行搅拌。其旋转次数为600rpm。不断对此时的纤维片的分散状态进行观察,测定直到分散时的时间(在下面的表中,单位为秒)。
湿润强度是采用下述的试样,通过万能拉力试验机,检测间距为100mm,张拉速度为100mm/min的方式来测定的,该试样是通过上述方法获得的纤维片,以宽度为25mm,长度为150mm的尺寸切断形成的。该测定是分别相对纸的纵向(MD:试验机的方向)和纸的横向(CD:横向)进行的。所测定的破裂时的强度(gf)为湿润强度的试验结果的值(在下面的表中,单位为g/25mm)。表1表示其结果。
表1
单位 | 第1实施例 | 第2实施例 | 第3实施例 | 第4实施例 | ||
单位织物面积重量 | g/m2 | 40 | 40 | 40 | 41 | |
厚度 | mm | 0.43 | 0.42 | 0.39 | 0.57 | |
密度 | g/cm3 | 0.09 | 0.10 | 0.10 | 0.07 | |
湿润强度 | MD | g/25mm | 51 | 51 | 47 | 67 |
CD | g/25mm | 39 | 40 | 38 | 56 | |
水解性 | 秒 | 110 | 62 | 41 | 89 | |
人造纤维的维度 | denier | 1.5 | 1.5 | 1.5 | 1.5 | |
人造纤维长度 | mm | 10 | 7 | 5 | 7 | |
喷水的压力 | kg/cm2 | 50 | 50 | 50 | 50 | |
喷水的处理次数 | 次 | 2 | 2 | 2 | 2 |
实施例B
与实施例A相同,对下述纤维片进行试验,该纤维片以本发明的水解性无纺布为主体,其不包括粘接剂。
作为原料纤维,采用纤维长度为7mm,维度为1.5denier的人造纤维(东邦レ——ョン(株)生产),按照与实施例A相同的方式,形成具有表2所列的单位面积重量的,尺寸为25cm×25cm的纤维网。此后,按照与实施例A相同的方式,获得纤维片,测定水解性和湿润强度。
作为比较例,对单位面积重量为15g/m2的纤维片,同样进行水解性和湿润强度的试验。
表2表示其结果。
表2
第1比较例 | 第2比较例 | 第1实施例 | 第2实施例 | 第3实施例 | |||
单位织物面积重量 | g/m2 | 15 | 100 | 25 | 41 | 80 | |
厚度 | mm | 0.16 | 0.78 | 0.27 | 0.4 | 0.65 | |
密度 | g/cm3 | 0.09 | 0.13 | 0.09 | 0.1 | 0.12 | |
湿润强度 | MD | g/25mm | 8 | 76 | 20 | 49 | 67 |
CD | g/25mm | 7 | 60 | 14 | 37 | 52 | |
水解性 | 秒 | 19 | 157 | 28 | 62 | 89 | |
人造纤维的维度 | denier | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | |
人造纤维的长度 | mm | 7 | 7 | 7 | 7 | 7 | |
喷水的压力 | kg/cm2 | 50 | 50 | 50 | 50 | 50 | |
的处理次数 | 次 | 2 | 2 | 2 | 2 | 2 |
实施例C
与实施例A相同,对下述纤维片进行试验,该纤维片以本发明的水解性无纺布为主体,其不包括粘接剂。
作为原料纤维,采用纤维长度为7mm,维度为1.5denier的人造纤维(东邦レ——ョン(株)生产),按照与实施例A相同的方式,形成尺寸为5cm×25cm,单位面积重量为40g/m2的纤维网。此后,按照与实施例A相同的方式,在表3所列的喷水处理的条件下,获得纤维片,测定所获得的水解性和湿润强度。
作为比较例,对未进行喷水处理的纤维片,同样进行水解性和湿润强度的试验。
表3表示其结果。
表3
第1比较例 | 第1比较例 | 第2比较例 | 第1实施例 | 第2实施例 | |||
单位织物面积重量 | g/m2 | 40 | 40 | 42 | 41 | 42 | |
厚度 | mm | 0.12 | 022 | 0.62 | 0.4 | 0.51 | |
密度 | g/cm3 | 0.33 | 0.18 | 0.07 | 0.1 | 0.08 | |
湿润强度 | MD | g/25mm | 41 | 42 | 68 | 49 | 56 |
CD | g/25mm | 40 | 38 | 35 | 37 | 38 | |
水解性 | 秒 | 10 | 15 | 189 | 62 | 91 | |
人造纤维的维度 | denier | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | |
人造纤维的长度 | mm | 7 | 7 | 7 | 7 | 7 | |
喷水的压力 | kg/cm2 | 无 | 30 | 50 | 50 | 50 | |
喷水的处理次数 | 次 | 无 | 1 | 8 | 2 | 4 |
实施例D
作为原料纤维,与实施例A相同,按重量百分比计采用针叶树漂白牛皮纸浆[加拿大标准游离度(CSF)=740ml]30%和人造纤维70%,对纤维片进行调整。通过喷射器,在经调整处理的纤维片上涂敷按重量百分比计为1%的甲基纤维素(信越化学社制),之后再次采用热风式干燥机对其进行干燥,从而获得水解性无纺布。将250g的下述水溶液浸渗于100g的该水解性无纺布中,该水溶液是按照硫酸钠∶三甲基甘氨酸∶丙二醇∶水=4.5∶4.5∶5∶86的配比方式混合形成的。与实施例A相同,对所获得的水解性无纺布测定水解性和湿润强度。
作为比较例,与实施例C相同,获得未进行喷水处理的纤维片。与上述实施例相同,进行水解性和湿润强度的试验。
表4表示其结果。
表4
单位 | 第1比较例 | 第1实施例 | 第2实施例 | |||
纤维的配比 | 人造纤维 | % | 70 | 70 | 30 | |
NBKP | % | 30 | 30 | 70 | ||
单位织物面积重量 | g/m2 | 44 | 43 | 43 | ||
厚度 | mm | 0.13 | 0.40 | 0.32 | ||
密度 | g/cm3 | 0.34 | 0.11 | 0.13 | ||
湿润强度 | MD | g/25mm | 408 | 340 | 618 | |
CD | g/25mm | 395 | 312 | 566 | ||
水解性 | 秒 | 9 | 22 | 24 |
实施例E
按照与实施例D的方式,获得具有表5所列的单位织物面积重量的水解性的无纺布。与实施例A相同,对所获得的无纺布测定水解性和湿润强度。
另外,作为比较例,与上述实施例相同,获得单位面积重量为15g/m2的水解性的无纺布。与上述实施例相同,对所获得的无纺布测定水解性和湿润强度。
表5表示其结果。
表5
单位 | 第1比较例 | 第1实施例 | 第2实施例 | 第3实施例 | 第4实施例 | ||
单位织物面积重量 | g/m2 | 15 | 20 | 40 | 80 | 100 | |
厚度 | mm | 0.22 | 0.27 | 0.40 | 0.11 | 0.94 | |
密度 | g/cm3 | 0.07 | 0.07 | 0.10 | 0.11 | 0.11 | |
湿润强度 | MD | g/25mm | 204 | 255 | 340 | 550 | 683 |
CD | g/25mm | 168 | 208 | 312 | 506 | 630 | |
水解性 | 秒 | 7 | 15 | 22 | 73 | 105 |
实施例F
与实施例D相同,混合表6所列的纤维,调整纤维片。采用喷射器,在经调整处理的纤维片上涂敷按重量百分比计为1%的甲基纤维素,之后再次采用热风式干燥机对其进行干燥,从而获得水解性无纺布。采用喷射器,将250g的下述化学溶液浸渗于100g的该水解性无纺布中,该化学溶液为下述的水溶液,其中化学溶液按重量计的配比是,无水硫酸钠∶三甲基甘氨酸∶丙二醇∶甲基丙烯酸(酯)顺丁烯二酸共聚物中的部分钠盐∶纯水=4.5∶4.5∶5∶1∶85的方式混合形成的。在将浸泡于上述化学溶液中的水解性无纺布于20℃的温度下静置24小时之后,与实施例A相同,测定其水解性和湿润强度。
表6表示其结果。
表6
比较例 | 第1实施例 | 第2实施例 | ||
纤维的配比 | 人造纤维(%) | 70 | 70 | 30 |
NBKP(%) | 30 | 30 | 70 | |
单位织物面积重量 | g/m2 | 44 | 43 | 43 |
厚度 | mm | 0.13 | 0.41 | 0.32 |
密度 | g/cm3 | 0.34 | 0.1 | 0.13 |
湿润强度:MD | g/25mm | 584 | 487 | 883 |
湿润强度:CD | g/25mm | 565 | 446 | 809 |
水解性 | 秒 | 9 | 21 | 22 |
另外,对于表6所列的第1实施例的水解性无纺布进行擦拭试验。
将污物散布于尺寸为30cm×30cm的塑料板上。干燥污物采用0.2g的试验用灰尘(J I S Z8901的试验用灰尘7种),另外,湿污物采用0.5ml的中浓度的沙司(ソ—ス)。将下述试样放置于上述塑料板上,该试样是,将表6中的第1实施例的水解性无纺布的,尺寸为20cm×15cm的块于试验道上、进行两次折叠,从而形成尺寸为10cm×15cm的试样(表6表示相应的水解性无纺布的性质的测定结果)。另外,将尺寸为10cm×5cm的塑料板放置于试验边的无纺布上,采用压力表,按照5m/min的移动速度,擦拭塑料板上的污物。由于将200g重物放置于塑料板上,从而在移动时,作用于试验边的水解性无纺布的压力为0.5kg。通过水解性无纺布对该塑料板的整个表面进行擦拭作业,反复进行上述作业,直至塑料板的污物完全没有。记录进行的擦拭作业的次数。作为第1比较例,采用表6的比较例的水解性无纺布,与上述实施例相同,进行测定。
另外,为了说明本发明的清洁用物品的擦拭效果与体积膨松有关系,作为第2比较例,在包含粘接剂之前,对表6的第1实施例的水解性无纺布进行热压缩处理,对所获得的水解性无纺布也进行相同的测定。上述热压缩的条件是这样的,即压力为20kg/cm2,温度为100℃,时间为30秒,进行压缩直至达到进行喷水处理之前的膨松度(厚度)。
表7表示其结果。
表7
第1比较例 | 第2比较例 | 第1实施例 | ||
喷水处理 | 无 | ○ | ○ | |
热压缩处理 | 无 | ○ | 无 | |
单位织物面积重量 | g/m2 | 44 | 43 | 43 |
厚度 | mm | 0.13 | 0.13 | 0.13 |
密度 | g/cm3 | 0.34 | 0.33 | 0.10 |
干燥污物 | 次 | 4 | 4 | 2 |
湿污物 | 次 | 3 | 3 | 2 |
从表7可知,按照本实施例,直至将污物完全擦掉的擦拭次数很少。即,在清洁作业时,花费较少的劳力。
按照上述方式,本发明的水解性无纺布即使在含有水分的湿润状态下,仍可确保在使用过程中具有足够的强度。另外,在使用之后,当其浸泡于大量的水中时,很容易分解。
此外,由于本发明的水解性无纺布的体积膨松,此外其表面形成有凹凸部,这样在用作清洁用物品的场合,可获得较高的擦拭效果。因此,可以较少的劳力,进行擦拭作业。此外,由于该清洁用物品较厚,这样手触或擦拭作业中的感觉较好。
Claims (13)
1、一种水解性无纺布,其特征在于在下述纤维片中包含水溶性或水膨润性的粘接剂,该纤维片是在对由水分散性的纤维形成的纤维网通过喷水处理,形成纤维密度较高的部分,以及纤维密封较低的部分,从而体积产生膨松,并且湿润时的断裂强度小于100g/25mm,不包含粘接剂的状态下的纤维片的水解性在100秒以下。
2、根据权利要求1所述的水解性无纺布,其特征在于包含粘接剂的状态下的水解性无纺布的水解性在120秒以下。
3、根据权利要求1或2所述的水解性无纺布,其特征在于其中还包括电解质。
4、根据权利要求1或2所述的水解性无纺布,其特征在于其纤维长度在10mm以下。
5、根据权利要求4所述的水解性无纺布,其特征在于纤维网包括其纤维长度7mm以下的再生纤维素纤维和针叶树纸浆。
6、根据权利要求1或2所述的水解性无纺布,其特征在于上述纤维片的纤维密度在0.3g/cm3以下。
7、根据权利要求1、2或5所述的水解性无纺布,其特征在于上述粘接剂为从下述一组成分选择出的一种或二种以上的化合物,该组成分包括羧甲基纤维素、烷基纤维素、聚乙烯醇、改性聚乙烯醇。
8、根据权利要求7所述的水解性无纺布,其特征在于相对100g的纤维,上述粘接剂的含量在0.5~30g的范围内。
9、根据权利要求3所述的水解性无纺布,其特征在于电解质为水溶性的无机盐和/或有机盐。
10、根据权利要求9所述的水解性无纺布,其特征在于上述电解质溶解于水中,上述纤维片浸渍有该水溶液。
11、根据权利要求1所述的水解性无纺布,其特征在于喷水的作功量为每无纺布的单面一次0.05~0.5kW/m2。
12、一种采用权利要求1所述的水解性无纺布的水解性清洁用物品。
13、根据权利要求12所述的水解性清洁用物品,其特征在于包括有机溶剂。
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- 1999-01-07 CA CA002258069A patent/CA2258069C/en not_active Expired - Fee Related
- 1999-01-12 US US09/229,375 patent/US6451718B1/en not_active Expired - Lifetime
- 1999-01-12 BR BRPI9900042-3A patent/BR9900042B1/pt not_active IP Right Cessation
- 1999-01-14 ID IDP990022D patent/ID23834A/id unknown
- 1999-01-15 AU AU12104/99A patent/AU728498B2/en not_active Ceased
- 1999-01-15 TW TW088100621A patent/TW409047B/zh not_active IP Right Cessation
- 1999-01-15 CN CNB99100678XA patent/CN1289734C/zh not_active Expired - Fee Related
- 1999-01-16 KR KR1019990001177A patent/KR100572528B1/ko not_active IP Right Cessation
- 1999-01-18 EP EP99100837A patent/EP0945536B1/en not_active Expired - Lifetime
- 1999-01-18 DE DE69939725T patent/DE69939725D1/de not_active Expired - Lifetime
-
2001
- 2001-02-16 US US09/788,157 patent/US6669878B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
MY125653A (en) | 2006-08-30 |
EP0945536A2 (en) | 1999-09-29 |
KR100572528B1 (ko) | 2006-04-24 |
SG83698A1 (en) | 2001-10-16 |
EP0945536A3 (en) | 2001-11-07 |
ID23834A (id) | 2000-05-25 |
DE69939725D1 (de) | 2008-11-27 |
AU1210499A (en) | 1999-08-05 |
TW409047B (en) | 2000-10-21 |
EP0945536B1 (en) | 2008-10-15 |
KR19990067946A (ko) | 1999-08-25 |
AU728498B2 (en) | 2001-01-11 |
US20010023160A1 (en) | 2001-09-20 |
US6669878B2 (en) | 2003-12-30 |
CN1233677A (zh) | 1999-11-03 |
US6451718B1 (en) | 2002-09-17 |
BR9900042A (pt) | 2000-06-27 |
CA2258069A1 (en) | 1999-07-16 |
BR9900042B1 (pt) | 2010-10-19 |
CA2258069C (en) | 2005-11-01 |
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