CN114191598A - 体液吸液性物品的表面材料 - Google Patents
体液吸液性物品的表面材料 Download PDFInfo
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Abstract
本发明的课题为在不降低体液吸液性物品的与皮肤接触的面的触感的情况下提高表面材料的与皮肤接触的面的耐磨性。一种耐磨性优异的体液吸液性物品的表面材料,其特征在于,表面材料是在长纤维网的表面层叠木棉纤维网而得的层叠体,层叠体通过使构成长纤维网的长纤维与构成木棉纤维网的木棉纤维相互交织而一体化,长纤维网的单位面积重量小于10g/m2,长纤维的单纤维纤度为1分特克斯以上且小于3分特克斯,长纤维网与木棉纤维网的质量比(长纤维网:木棉纤维网)为1:1.5~3.5,层叠体的单位面积重量为20g/m2~35g/m2。
Description
技术领域
本发明涉及在卫生巾、一次性尿布、失禁垫等体液吸液性物品中用于与皮肤接触处的表面材料。
背景技术
一直以来,作为卫生巾、一次性尿布、失禁垫等体液吸液性物品的表面材料,采用短纤维无纺布、长纤维无纺布。表面材料是与皮肤直接接触的材料,因此要求触感好的材料,有优选木棉纤维的倾向。但是,与长纤维无纺布相比,仅由木棉纤维构成的无纺布的强度差,因此本案申请人提出了层叠木棉纤维和长纤维无纺布而成的表面材料(专利文献1)。
专利文献1:实用新型注册第3218416号公报
发明内容
本发明在利用了专利文献1所记载的发明的基础上,进行了改进,其课题为提供在不降低体液吸液性物品的与皮肤接触的面的触感的情况下提高表面材料的与皮肤接触的面的耐磨性。
本发明实现了上述课题,其要旨为一种耐磨性优异的体液吸液性物品的表面材料,其特征在于,表面材料是在长纤维网的表面层叠木棉纤维网而得的层叠体,
分特克斯层叠体通过使构成长纤维网的长纤维与构成木棉纤维网的木棉纤维相互交织而一体化,
长纤维网的单位面积重量小于10g/m2,长纤维的单纤维纤度为1分特克斯(Decitex)以上且小于3分特克斯,
长纤维网与木棉纤维网的质量比(长纤维网:木棉纤维网)为1:1.5~3.5,
层叠体的单位面积重量为20g/m2~35g/m2。
本发明是卫生巾、一次性尿布、失禁垫等体液吸液性物品的表面材料,表面材料是在长纤维网的表面层叠木棉纤维网而得的层叠体。而且,通过使构成长纤维网的长纤维与构成木棉纤维网的木棉纤维相互交织,作为层叠体而一体化。
长纤维网是连续多根长纤维堆积而成的,构成长纤维网的长纤维优选由丙烯系聚合物构成。由丙烯系聚合物构成的长纤维容易弯曲且柔软性良好,因此与木棉纤维良好地交织,成为耐磨性优异的表面材料。作为丙烯系聚合物,可以举出丙烯均聚物、丙烯·α-烯烃无规共聚物或丙烯·α-烯烃嵌段共聚物等,作为α-烯烃,可以举出乙烯、1-丁烯、1-戊烯、1-己烯、1-辛烯、4-甲基-1-戊烯等除丙烯以外的α-烯烃。
本发明中的构成长纤维网的长纤维的单纤维纤度为1分特克斯以上且小于3分特克斯。通过设为1分特克斯以上,在与木棉纤维的交织处理时,长纤维不容易被切断,维持长纤维形态的同时与木棉纤维良好地交织。另一方面,通过小于3分特克斯,长纤维具有柔软性,对弯曲没有抵抗,容易弯曲,因此与木棉纤维的交织性提高,从而在整个面方向上致密且均匀地交织。另外,如后所述,由于长纤维网的单位面积重量小于10g/m2,所以如果构成长纤维网的长纤维的单纤维纤度超过3分特克斯,则长纤维在单位面积中所占的根数相对减少,由此长纤维与木棉纤维的交织处也相对减少,其结果是长纤维网与木棉纤维网的交织性差,得不到本发明目的的耐磨性优异的表面材料。从这样的观点出发,长纤维的单纤维纤度更优选为1分特克斯~2分特克斯。
长纤维网的单位面积重量小于10g/m2。通过小于10g/m2,厚度小,具有在厚度方向上贯通的空隙,从而长纤维与木棉纤维在整个面方向上致密且均匀地交织,耐磨性优异。如果是上述单纤维纤度的长纤维、且长纤维网的单位面积重量超过10g/m2,则不易保持在厚度方向上贯通的空隙,不易实现本发明的目的。
本发明中的长纤维网可以使用由所谓的纺粘法制造的长纤维网,也可以使用通过热压纹加工而部分热压的长纤维网。
本发明中的木棉纤维网通过层叠于上述长纤维网的表面并进行交织而一体化。构成木棉纤维网的木棉纤维可以使用公知的木棉纤维,但是优选使用未脱脂棉。未脱脂棉是指天然的木棉纤维所具有的棉籽油等油脂成分尚未完全除去的木棉纤维。如果使用完全除去棉籽油等油脂成分的脱脂棉,则木棉纤维本身容易吸收体液,有在使用时发粘的倾向。因此,在未脱脂棉的情况下,具有木棉纤维本身的吸液性降低,发粘变少的优点。另外,为了降低木棉纤维本身的吸液性,可以对木棉纤维赋予防水剂。作为防水剂,优选赋予后述的特定的油剂。另外,作为木棉纤维,优选使用漂白棉、特别是未脱脂漂白棉。
通过漂白,木棉纤维的色彩变成白色,赋予清洁感。
作为防水剂的油剂,优选赋予(1)包含亲油性单硬脂酸甘油酯和聚氧乙烯月桂基醚的油剂、(2)包含硬脂酸酰胺和牛脂硬化油的油剂、(3)包含硬脂酸酰胺和棕榈油的油剂中的任一个。可以单独或混合赋予这些油剂。通过使用这样特定的油剂,可以适当地赋予亲水性和防水性这两个性能,对渗出的体液进行点吸液。油剂中的亲油性单硬脂酸甘油酯与聚氧乙烯月桂基醚的量的比例、硬脂酸酰胺与牛脂硬化油的量的比例以及硬脂酸酰胺与棕榈油的量的比例优选为同量程度。
为了赋予油剂,一般而言,使油剂成为液态进行涂覆。在亲油性单硬脂酸甘油酯和聚氧乙烯月桂基醚的情况下,聚氧乙烯月桂基醚为液体,因此可以在这里溶解或分散亲油性单硬脂酸甘油酯进行涂覆。另外,在硬脂酸酰胺和牛脂硬化油的情况下,可以在乙酸等溶剂中溶解两者进行涂覆。在涂覆时,在木棉纤维网与长纤维网一体化而得的层叠体中,涂覆到木棉纤维网侧的面即可。
油剂的赋予量是任意的,但是一般而言,相对于木棉纤维网质量,优选为0.05~1.5质量%。通过将赋予量设为0.05质量%以上,可以有效地发挥体液的点吸液性。另一方面,如果赋予量超过1.5质量%,则产生纤维彼此容易滑动、容易解开纤维彼此的缠绕的倾向。
本发明的表面材料是通过使构成长纤维网的长纤维与构成木棉纤维网的木棉纤维相互交织而一体化而成的层叠体。层叠体的单位面积重量为20g/m2~35g/m2,长纤维网与木棉纤维网的质量比(长纤维网:木棉纤维网)为1:1.5~3.5。通过使作为层叠体的表面材料的单位面积重量为20g/m2以上,在与皮肤接触的一侧能够充分感受到木棉纤维良好的触感,另外,通过设为35g/m2以下,可以将表面材料中吸液的体液迅速转移到位于表面材料下的吸收体。另外,在本发明中,层叠体的单位面积重量为20g/m2~35g/m2且长纤维网与木棉纤维网的质量比(长纤维网:木棉纤维网)为1:1.5~3.5是重要的。通过木棉纤维网的质量相对于长纤维网的质量为1.5以上,木棉纤维网良好地覆盖长纤维网表面,在与皮肤接触的一侧可以保持木棉纤维良好的触感。另一方面,通过将木棉纤维网的质量相对于长纤维网的质量设为3.5以下,构成长纤维网的长纤维与构成木棉纤维网的木棉纤维致密地交织在一起,作为短纤维的木棉纤维与连续的长纤维缠绕,从而即使对成为与皮肤接触的一侧的木棉纤维网侧施加由摩擦产生的力,也会成为不易解开木棉纤维的缠绕的状态,不易起毛,耐磨性良好。如果木棉纤维网相对于长纤维网的质量的质量比超过3.5,则木棉纤维的量相对增加,因此与长纤维缠绕的木棉纤维的比率也相对减少,如果施加表面摩擦的力,则不能耐受摩擦力而表面侧存在的木棉纤维变得容易活动,解开缠绕并容易产生起毛。
本发明的表面材料具有上述构成,如图1所示,作为从体液渗出侧依次配置表面材料1、吸液体2和防漏材料3而成的体液吸液性物品使用。
根据本发明,可以在不降低体液吸液性物品的与皮肤接触的面的触感的情况下提高表面材料的与皮肤接触的面的耐磨性。
附图说明
图1是本发明的一个例子的体液吸液性物品的截面示意图。
符号说明
1 表面材料
2 吸液体
3 防漏材料
实施例
实施例1
[长纤维无纺布的准备]
准备实施热压纹加工且利用纺粘法而得的聚丙烯长纤维无纺布(单位面积重量8g/m2、长纤维的单纤维纤度1.5分特克斯、基于热压纹加工的压接面积率18%)。应予说明,构成长纤维的聚丙烯的熔体流动速率(JIS-K7210温度230℃、负荷2.16kg)为60g/10分钟。
[木棉纤维网的准备]
用并联梳棉机将平均纤维长25mm的漂白棉开纤和集聚,准备单位面积重量15g/m2的木棉纤维网。
[层叠体]
将上述准备的长纤维无纺布和木棉纤维网层叠,通过高压水流喷出装置(孔径0.1mm的喷出孔以孔间隔0.6mm水平排成一列配置而成的装置),从木棉纤维网侧以3MPa的喷出压力施加高压水流,然后以6MPa的喷出压力施加高压水流,然后,进行反转并从长纤维无纺布侧以4MPa的喷射压力施加高压水流。此时,载置于由90目的织物构成的支承体并施加水流。然后,进行反转,载置于由15目的织物构成的支承体,从木棉纤维网侧施加4MPa的喷射压力,由此制成交织一体化的层叠体。然后,在135℃下加热120秒,蒸发层叠体中包含的水分,得到表面材料。
实施例2
在实施例1中,使用单位面积重量20g/m2的木棉纤维网作为木棉纤维网,除此之外,与实施例1同样地得到表面材料。
实施例3
在实施例1中,使用单位面积重量25g/m2的木棉纤维网作为木棉纤维网,除此之外,与实施例1同样地得到表面材料。
实施例4
在实施例2中,在所有工序中仅使用由90目的织物构成的支承体作为施加高压水流时使用的支承体,除此之外,与实施例2同样地得到表面材料。
实施例5
使用吻涂涂布机,在实施例2中得到的表面材料上涂覆包含亲油性单硬脂酸甘油酯和聚氧乙烯月桂基醚的油剂。相对于表面材料质量,将该油剂的赋予量设为0.3质量%。应予说明,在使用吻涂涂布机进行涂覆时,涂覆面设为长纤维网侧的面,赋予油剂后,在温度130℃下实施干燥处理,得到实施例5的表面材料。
比较例1
在实施例1中,使用单位面积重量16g/m2的聚丙烯长纤维无纺布作为长纤维无纺布,除此之外,与实施例1同样地得到比较例1的表面材料。
对于得到的实施例1~5、比较例1的表面材料进行耐磨性的评价。评价如下。
[耐磨性(次)的评价]
对于实施例和比较例中得到的各表面材料,依据JIS L 0849,设置于学振型摩擦坚牢度试验机(大荣科学精器制作所株式会社制、型号“RT-300”),测定耐磨性。应予说明,在设置试验片时,在试验片下预先铺聚氨酯垫,以不产生褶皱的方式将试样固定在学振型摩擦坚牢度试验机附带的固定具上。另外,用布胶带覆盖摩擦端子表面,对摩擦端子施加负荷300g,使布胶带与试样接触。然后,以30次/分钟的往复速度滑动摩擦端子,每50次往复停止试验机的往复动作,目视确认试验片的表面状态,继续往复动作直到确认到破损。例如,对于在200次未确认到破损而在250次确认到破损的试验片,将耐磨性的次数设为耐磨性200次。然后,对于实施例和比较例的各表面材料,对试验片2处进行测定,将它们的平均值作为耐磨性(次)。应予说明,在即使往复次数超过500次也不能目视确认到破损时,停止测定,设为往复次数500次。因此,耐磨性(次)的值的最大值为500次。
进行耐磨性评价的结果是,实施例1的表面材料为500次,实施例2的表面材料为500次,实施例3的表面材料为500次,实施例4的表面材料为425次,实施例5的表面材料为200次,比较例1的表面材料为125次,本发明的表面材料的耐磨性优异。
Claims (6)
1.一种耐磨性优异的体液吸液性物品的表面材料,是体液吸液性物品的表面材料,其特征在于,表面材料是在长纤维网的表面层叠木棉纤维网而得的层叠体,
所述层叠体通过使构成所述长纤维网的长纤维与构成所述木棉纤维网的木棉纤维相互交织而一体化,
所述长纤维网的单位面积重量小于10g/m2,所述长纤维的单纤维纤度为1分特克斯以上且小于3分特克斯,
所述长纤维网与所述木棉纤维网的质量比、即长纤维网:木棉纤维网为1:1.5~3.5,
所述层叠体的单位面积重量为20g/m2~35g/m2。
2.根据权利要求1所述的耐磨性优异的体液吸液性物品的表面材料,其特征在于,所述长纤维由丙烯系聚合物构成。
3.根据权利要求1或2所述的耐磨性优异的体液吸液性物品的表面材料,其特征在于,木棉纤维网一侧是与皮肤接触的一侧。
4.根据权利要求1~3中任一项所述的耐磨性优异的体液吸液性物品的表面材料,其特征在于,对层叠体赋予油剂,该油剂是(1)包含亲油性单硬脂酸甘油酯和聚氧乙烯月桂基醚的油剂、(2)包含硬脂酸酰胺和牛脂硬化油的油剂、(3)包含硬脂酸酰胺和棕榈油的油剂中的任一者。
5.根据权利要求1~4中任一项所述的耐磨性优异的体液吸液性物品的表面材料,其特征在于,所述木棉纤维是未脱脂且漂白的木棉纤维。
6.一种体液吸液性物品,其特征在于,是在权利要求1~5中任一项所述的表面材料下依次配置吸液体、防漏材料而成的。
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