CN105407846A - 吸收性物品 - Google Patents
吸收性物品 Download PDFInfo
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- CN105407846A CN105407846A CN201480042234.0A CN201480042234A CN105407846A CN 105407846 A CN105407846 A CN 105407846A CN 201480042234 A CN201480042234 A CN 201480042234A CN 105407846 A CN105407846 A CN 105407846A
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- superabsorbent polymer
- layer
- absorber
- polymer
- sheet
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- 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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- 230000002745 absorbent Effects 0.000 title claims abstract description 45
- 239000002250 absorbent Substances 0.000 title claims abstract description 45
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- 229920000642 polymer Polymers 0.000 claims abstract description 20
- 229920000247 superabsorbent polymer Polymers 0.000 claims description 96
- 238000000034 method Methods 0.000 claims description 41
- 239000007788 liquid Substances 0.000 claims description 39
- 230000035699 permeability Effects 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 23
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 13
- 230000008595 infiltration Effects 0.000 claims description 13
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- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 3
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- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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- YRAVMATXWNDGAI-UHFFFAOYSA-N acetic acid;ethene;prop-2-enoic acid Chemical group C=C.CC(O)=O.OC(=O)C=C YRAVMATXWNDGAI-UHFFFAOYSA-N 0.000 description 1
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- BESJRHHIPGWPTC-UHFFFAOYSA-N azane;copper Chemical compound N.[Cu] BESJRHHIPGWPTC-UHFFFAOYSA-N 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
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- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
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- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Laminated Bodies (AREA)
Abstract
【课题】在基于立体开孔网片与气流成网吸收体的组合的吸收性物品中,能够使吸收体迅速吸收所述立体开孔网片上表面的体液,且能实现吸收体的体液吸收量的增大。【解决手段】透液性正面片(3)中,对形成有向肌肤侧突出的多个微小凸部(7)且将这些微小凸部(7)的顶面设成开孔(8)的立体开孔网片(3A)通过机械压花处理而形成向非肌肤面侧凹陷的多个凹部(9),吸收体(4)设为从所述透液性正面片(3)侧起依次为浆粕气流成网无纺布层(10A)、高吸收性聚合物A层(12)、浆粕气流成网无纺布层(10B)、高吸收性聚合物B层(13)、浆粕气流成网无纺布层(10C)的5层结构的气流成网吸收体,所述高吸收性聚合物A层(12)使用吸收速度高的材料,所述高吸收性聚合物B层(13)使用吸收容量高的材料。
Description
技术领域
本发明涉及将浆粕气流成网(AirlaidPulp)无纺布用于吸收体的薄型的生理用卫生巾、卫生护垫、失禁衬垫等吸收性物品。
背景技术
以往,作为失禁衬垫、生理用卫生巾、失禁衬垫等吸收性物品,已知如下的吸收性物品:在聚乙烯片或聚乙烯层压无纺布等的不透液性反面片与无纺布等的透液性正面片之间设置有由棉状纸浆等构成的吸收体;但由于收纳性差、相对于身体的贴合性差、物流的高效化及节省资源的理由,近年来,将浆粕气流成网无纺布(以下也简称为“气流成网”)作为吸收体使用的薄型的吸收性物品为人所知。
另一方面,作为所述透液性正面片,下述专利文献1中公开了显现出柔软的丝绸那样的触感的微小开口化高分子网(以下称为“立体开孔网片”)。该网片如图6所示,为如下的微小开口化高分子网:至少在一面上具有柔软的丝绸那样的触感的微小开口化高分子网110中,上述网的丝绸触感面在网与观察者的眼睛之间的垂直距离至少为约30.5cm(12英寸)时,显示出正常的肉眼不能分别识别的顶部的开口所形成的不连续的表面变形部120的图案,各表面变形部120具有从形成表面变形部120的面起大致垂直的高度,在各表面变形部120的端部上与最大高度点大致一致而形成至少1个微小开口部125,上述微小开口部125为如下的喷火口状开口部:为了网的触感大致成为柔软且丝绸那样,具有表面变形部120的各自的耐压缩性和耐剪断性、以及减少与观察者的皮肤之间的接触度的比较薄的不规则形状的花瓣状部。该专利文献中,公开了与所述微小开口125不同地形成宏观的压花(参照该文献的图6),以及为了提高向吸收体的流体输送特性,将这些宏观的压花的底面设成开口作为流体通过孔(参照该文献的图7)。
此外,作为公开了如前所述形成向肌肤侧突出的大量微小凸部并且将其顶部设成开口的立体开孔网片的文献,还可举出例如下述专利文献2、3等。
在先技术文献
专利文献
专利文献1:日本专利第2543502号公报
专利文献2:日本特开平8-260329号公报
专利文献3:日本特开平10-131014号公报
发明内容
不过,在设想基于所述立体开孔网片和气流成网吸收体的组合的吸收性物品的情况下,可预想到如下的问题。
(1)为了不在立体开孔网片的上表面残留体液,需要吸收体具备充分的体液吸收能,而在将所述气流成网用作吸收体的薄型的吸收性物品的情况下,与现有的片状纸浆吸收体相比体液的吸收量较少。为了弥补该缺点,可考虑(1)提高单位面积质量;(2)增加高吸收性聚合物的混合量等方法,但在提高了单位面积质量的情况下吸收体变厚,失去了使用气流成网吸收体的意义。另外,若提高高吸收性聚合物的配合量,则会发生膨润后的吸水聚合物间的空隙极度下降的所谓“凝胶阻塞”,会发生无法体现期望的吸水力、高吸收性聚合物容易不均配置、引起外形破坏等问题。
(2)为了不在立体开孔网片的上表面残留体液而使吸收体迅速吸收体液,在所述专利文献1中,记载了与所述微小开口另行地形成宏观的压花,并且将这些宏观的压花的底面设成开口作为流体通过孔,但在提高了高吸收性聚合物的配合量的气流成网吸收体的情况下,有时高吸收性聚合物会从所述流体通过孔脱离。
因此本发明的主要课题是,在基于所述立体开孔网片和气流成网吸收体的组合的吸收性物品中,在所述立体开孔网片上不形成与微小孔不同的开孔面积相对较大的流体通过孔,而能够使吸收体迅速吸收立体开孔网片上表面的体液,且能够实现吸收体的体液吸收量的增大,并且防止高吸收性聚合物引起的凝胶阻塞、高吸收性聚合物的不均、脱离及外形破坏等。
为了解决前述课题,作为技术方案1的本发明,提供一种吸收性物品,在透液性正面片与反面片之间设置有吸收体,其特征在于,
所述透液性正面片使用形成有向肌肤侧突出的多个微小凸部,并且将这些微小凸部的顶面设成开孔的立体开孔网片,对于该立体开孔网片通过机械压花处理而形成有向非肌肤面侧凹陷的多个凹部,
所述吸收体为从所述透液性正面片侧起依次为浆粕气流成网无纺布层、高吸收性聚合物A层、浆粕气流成网无纺布层、高吸收性聚合物B层、浆粕气流成网无纺布层的5层结构的气流成网吸收体,构成所述高吸收性聚合物A层的高吸收性聚合物使用具有与构成所述高吸收性聚合物B层的高吸收性聚合物相比吸收速度相对较高的物理参数的材料,构成所述高吸收性聚合物B层的高吸收性聚合物使用具有与构成所述高吸收性聚合物A层的高吸收性聚合物相比吸收容量相对较高的物理参数的材料。
上述技术方案1记载的发明中,作为透液性正面片,使用形成有向肌肤侧突出的多个微小凸部,并且将这些微小凸部的顶面设成开孔的立体开孔网片,对于该立体开孔网片通过机械压花处理而形成向非肌肤面侧凹陷的多个凹部。排出的体液通过所述微小孔向吸收体侧转移,但所述凹部暂时起到容器的作用,因此体液容易从所述微小孔迅速流出。另外,凸部的部分上体液相对较早地消失,因此相对于肌肤的潮湿感也较早地消失。
另外,在所述立体开孔网片没有形成与微小孔不同的、开孔面积相对较大的流体通过孔,因此高吸收性聚合物不会向外脱离。
另一方面,吸收体设为从所述透液性正面片侧起依次为浆粕气流成网无纺布层、高吸收性聚合物A层、浆粕气流成网无纺布层、高吸收性聚合物B层、浆粕气流成网无纺布层的5层结构的气流成网吸收体,所述高吸收性聚合物A层使用具有吸收速度相对较高的物理参数的材料,所述高吸收性聚合物B层使用吸收容量相对较高的物理参数的材料。
因此,能够将从正面片流入的体液迅速向吸收体引入。另外,关于体液,通过所述高吸收性聚合物B层,即使是薄型的气流成网吸收体,也能够保持较多的体液,能实现吸收量的增大。高吸收性聚合物分成A层、B层而层状地配置,因此不会不均地配置,难以引起外形破坏。
作为技术方案2的本发明,基于技术方案1记载的吸收性物品,构成所述高吸收性聚合物A层的高吸收性聚合物的基于下述<吸水速度试验>的吸收速度小于40(s)。
<吸收速度试验>
(1)向100ml烧杯放入生理食盐水50ml和搅拌管芯,将烧杯载置于磁性搅拌器。
(2)使磁性搅拌器的转速为600±60次,在生理食盐水产生旋涡之后迅速向烧杯中添加2.0g。
(3)使用秒表,计测从聚合物添加后起直至液面的旋涡收敛的时间点为止的时间(s),作为吸收速度(s)。
上述技术方案2记载的发明在数值上规定构成所述高吸收性聚合物A层的高吸收性聚合物的吸水速度特性。
作为技术方案3的本发明,基于技术方案1、2中任一项记载的吸收性物品,构成所述高吸收性聚合物B层的高吸收性聚合物的基于下述<吸水量试验>的吸水量为70(g)以上。
<吸水量试验>
(1)将聚合物0.5g放入茶袋(200网眼尼龙制袋),放入200ml烧杯,并向200ml烧杯放入生理食盐水100ml。
(2)浸渍30分钟,浸渍后悬吊5分钟而将水控去,测定质量Wa(g)。
(3)对未放入聚合物的茶袋也进行同样的操作,测定质量Wb(g)。
(4)由Wa(g)-Wb(g)/聚合物的质量(g),求出吸水量(g)。
上述技术方案3记载的发明在数值上规定构成所述高吸收性聚合物B层的高吸收性聚合物的吸水量特性。
作为技术方案4的本发明,提供基于技术方案1~3中任一项记载的吸收性物品,在所述透液性正面片与吸收体之间设置有热风无纺布。
上述技术方案4记载的发明通过在所述透液性正面片与吸收体之间设置热风无纺布,而使体液容易向吸收体侧转移。即,若将容易蓬松的热风无纺布用作第二片,则在透液性正面片与吸收体之间不会产生间隙,可确保连续性,因此体液容易向吸收体侧转移。
作为技术方案5的本发明,提供基于技术方案1~4中任一项记载的吸收性物品,关于所述吸收体,单位面积质量为150~200g/m2,高吸收性聚合物相对于吸收体的全重量的配合重量为30~50重量%,构成所述高吸收性聚合物A层的高吸收性聚合物/构成所述高吸收性聚合物B层的高吸收性聚合物的重量比率为1~1.5,整体的厚度为2mm以下。
上述技术方案5记载的发明对吸收体的优选的物理参数进行了具体规定。即,吸收体的单位面积质量期望为150~200g/m2,高吸收性聚合物相对于吸收体的全重量的配合重量期望为30~50重量%。另外,构成所述高吸收性聚合物A层的高吸收性聚合物相对于构成所述高吸收性聚合物B层的高吸收性聚合物的重量比率设为1~1.5,将两者以相同分量配置,或为了提高体液的吸收性而将构成所述高吸收性聚合物A层的高吸收性聚合物在100~150重量%以内稍多地配置。而且所述吸收体的厚度设为2mm以下即可。
发明效果
如以上详细说明,根据本发明,在基于所述立体开孔网片和气流成网吸收体的组合的吸收性物品中,在所述立体开孔网片上不形成与微小孔不同的、开孔面积相对较大的流体通过孔,能够使吸收体迅速吸收立体开孔网片上表面的体液,并且能实现吸收体的体液吸收量的增大。而且,能够防止基于高吸收性聚合物的凝胶阻塞、高吸收性聚合物的不均、脱离或外形破坏。
附图说明
图1是本发明的吸收性物品(生理用卫生巾1)的立体图。
图2是透液性正面片3的压花加工前的横剖视图。
图3的(A)、(B)都是表示透液性正面片3的机械压花加工处理后的例子的横剖视图。
图4是表示吸收体4的构成的横剖视图。
图5是用于说明体液U的吸收状态的主要部分横剖视图。
图6是现有例的立体开孔网片110的主要部分立体图。
具体实施方式
以下参照附图详细说明本发明的实施方式。
(生理用卫生巾1的参考方式例)
生理用卫生巾1主要用于卫生护垫、生理用卫生巾、失禁衬垫等用途,例如如图1所示,主要包括:由聚乙烯片等构成的不透液性反面片2;使经血或白带等迅速透过的透液性正面片3;设置于这两片2、3间的气流成网吸收体4;围绕所述吸收体4的卫生纸等皱纹纸5;配置于所述透液性正面片3与吸收体4之间的第二片6。在所述吸收体4的周围,所述不透液性反面片2和透液性正面片3通过热熔粘接剂等接合手段接合。所述皱纹纸5也可以省略。
以下具体地进行说明。
所述不透液性反面片2虽采用聚乙烯、聚丙烯等烯烃树脂片等至少具有隔水性的片材,但是,除此之外,也可以使用在聚乙烯片等上层叠无纺布得到的层压无纺布、进一步在夹有防水膜而实质上确保不透液性的基础上使用无纺布片(在这种情况下,通过防水膜和无纺布来构成不透液性反面片)等。近年来,从防止闷湿的观点出发,存在采用具有透湿性的材料的倾向。这种隔水/透湿性片是在聚乙烯或聚丙烯等链烯烃类树脂中熔融捏合无机填充剂而形成薄片后沿单轴或双轴方向延伸从而获得的微多孔性片。
所述透液性正面片3使用如下材料:如图2所示,使用具有形成向肌肤侧突出的多个微小凸部7、7…,并且将这些微小凸部7、7…的顶面设成开孔8、8…的三维表面结构(立体微小孔)的立体开孔网片3A,对于该立体开孔网片3A通过机械压花处理,如图3所示,形成向非肌肤面侧凹陷的多个凹部9、9…。
所述立体开孔网片3A的所述微小凸部7、7…的直径设为0.1~0.3mm,优选设为0.13~0.27mm,高度设为0.05~0.4mm,优选设为0.15~0.3mm。所述微小凸部7、7…的间隔设为0.3~0.7mm。
所述立体开孔网片3A的开孔8是否成为微小凸部7,从离开10cm以上处几乎无法通过目视确认。这种立体开孔网片3A自身是公知的。开孔形成方法能够通过液压成形(高压液体喷射)、真空成形、针冲孔等方法形成。这些开孔形成方法中,在微小孔的周缘起毛这一点上(花瓣状),期望采用液压成形(高压液体喷射)、真空成形。
所述液压成形是在薄膜被支承在微细网织线支承构件上或形成有多个微小孔的支承体上时使高压液体射流与平坦的高分子薄膜的网的露出面上碰撞从而形成立体微小孔的方法,所述真空成形是在薄膜存在于微细网织线支承构件上或形成有多个微小孔的支承体上的期间,从相反侧吸引而作用真空压,从而向所述微小孔内吸引薄膜而在微小孔内使薄膜鼓起,最后在前端使其破裂,由此形成立体微小孔的方法。作为所述薄膜的材料,优选使用例如聚乙烯或聚丙烯等的烯烃系、聚酯系的薄膜。薄膜的单位面积质量优选设为20~30g/m2。
对于所述立体开孔网片3A,如图3所示,通过机械压花处理,形成向非肌肤面侧凹陷的多个凹部9、9…。机械压花处理是在形成有多个凸部的压花辊与形成有与所述凸部对应的凹部的砧辊之间,使所述立体开孔网片3A通过,形成向非肌肤面侧凹陷的多个凹部9、9…。该凹部9、9…的配置可以是格子状配置,也可以是锯齿状配置。各凹部9、9…的中心间距离以2.0~5.0mm配置,期望以3.0~4.0mm配置。凹部形状可以如图3(A)所示,压花间的横截面形状成为圆弧状,在其边界部形成倒锥状的凹部9、9…,也可以如图3(B)所示,形成凹陷成圆形或椭圆状的凹部9、9…。
接着,对所述气流成网吸收体4进行说明。如图4所示,本发明的气流成网吸收体4形成为从所述透液性正面片3侧起依次为浆粕气流成网无纺布层10A、高吸收性聚合物A层12、浆粕气流成网无纺布层10B、高吸收性聚合物B层13、浆粕气流成网无纺布层10C的5层结构的气流成网吸收体。
所述浆粕气流成网无纺布10A~10C是通过将规定长度的纤维分丝而搭载于空气的流动进行搬送,使其通过金属网或具有细孔的丝网后,落下堆积于金属丝筛网上的气流法来形成网,通过粘合剂纤维使该网中的纤维彼此的交点热熔接,或利用乳胶粘合剂使纤维交点结合而形成的片状的吸收体。作为构成所述浆粕气流成网无纺布的纤维,除了纸浆纤维以外,还可使用热塑性纤维的短纤维。作为热塑性纤维,可举出例如聚丙烯、低密度聚乙烯、低密度聚乙烯、线状低密度聚乙烯、丙烯和α烯烃构成的结晶性丙烯共聚物等的烯烃类、聚酰胺类、聚对苯二甲酸乙二醇酯、聚对苯二甲酸丁二醇酯、使二醇和对苯二酸/间苯二甲酸共聚后的低熔点聚酯、聚酯弹性体等的聚酯类等的各种合成纤维。
作为所述粘合剂纤维,优选使用由熔点不同的低熔点树脂和高熔点树脂构成且该低熔点树脂形成纤维表面的至少一部分的热粘性复合纤维。热粘性复合纤维的方式可使用以熔点高的纤维为芯且以熔点低的纤维为鞘的芯鞘型纤维、平行型纤维、分割型纤维等任一种复合纤维。
作为所述乳胶粘合剂,也可使用水系乳胶粘合剂及有机溶剂系的乳胶粘合剂中的任一种,但从处理性及安全性等方面考虑,优选使用水系乳胶粘合剂。作为粘合剂成分,可使用丙烯系树脂、乙酸乙烯酯系树脂、苯乙烯-丁二烯系树脂等。
所述气流成网吸收体4期望单位面积质量为150~200g/m2,高吸收性聚合物相对于气流成网吸收体4的全重量的配合重量为30~50重量%,且期望整体的厚度为2mm以下。另外,构成所述高吸收性聚合物A层12的高吸收性聚合物/构成所述高吸收性聚合物B层13的高吸收性聚合物的重量比率设为1~1.5,期望将两者以相同分量配置,或为了提高体液的吸收性而将构成所述高吸收性聚合物A层12的高吸收性聚合物在100~150重量%以内稍多地配置。
所述气流成网吸收体4的单位面积质量的测定方法是用辊刀从试样切出20mm×40mm(±2mm)的尺寸而测定重量,换算成每1m2的重量而设为单位面积质量(g/m2)。此外,对于后述的第二片6也能够通过同样的方法测定单位面积质量。另外,所述气流成网吸收体4的厚度的测定方法是使用株式会社尾崎制作所的厚度测定器(Peacock、表盘式厚度规大型、型号J-B(测定范围0~35mm)),将试样和厚度测定器设成水平而进行测定。
作为用于所述高吸收性聚合物A层12及高吸收性聚合物B层13的高吸收性聚合物,可举出例如将聚丙烯酸盐交联物、自交联的聚丙烯酸盐、丙烯酸酯-醋酸乙烯共聚物交联物的皂化物、异丁烯-马来酸酐共聚物交联物、聚磺酸盐交联物、聚环氧乙烷、聚丙烯酰胺等水膨润性聚合物部分交联而得到的材料等。这些材料中,优选吸水量、吸水速度优良的丙烯酸或丙烯酸盐类材料。具有所述吸水性能的高吸水性树脂在制造工艺中通过调整交联密度及交联密度梯度,而能够调整吸水力和吸水速度。
所述气流成网吸收体4中,构成所述高吸收性聚合物A层12的高吸收性聚合物使用具有与构成所述高吸收性聚合物B层13的高吸收性聚合物相比吸收速度相对较高的物理参数的材料,构成所述高吸收性聚合物B层13的高吸收性聚合物使用具有与构成所述高吸收性聚合物A层12的高吸收性聚合物相比吸收容量相对较高的物理参数的材料。
具体而言,作为构成所述高吸收性聚合物A层12的高吸收性聚合物,使用基于下述<吸水速度试验>的吸收速度小于40(s)、优选为1~30(s)、更优选为25~30(s)的材料。
<吸收速度试验>
(1)向100ml烧杯放入生理食盐水50ml和搅拌管芯,将烧杯载置于磁性搅拌器。
(2)使磁性搅拌器的转速为600±60次,在生理食盐水产生旋涡之后迅速向烧杯中添加2.0g。
(3)使用秒表,计测从聚合物添加后起直至液面的旋涡收敛的时间点为止的时间(s),作为吸收速度(s)。
另一方面,作为构成所述高吸收性聚合物B层13的高吸收性聚合物,使用基于下述<吸水量试验>的吸水量为70(g)以上、优选为70~80(g)、更优选为70~75(g)的材料。
<吸水量试验>
(1)将聚合物0.5g放入茶袋(200网眼尼龙制袋),放入200ml烧杯,并向200ml烧杯放入生理食盐水100ml。
(2)浸渍30分钟,浸渍后悬吊5分钟而将水控去,测定质量Wa(g)。
(3)对未放入聚合物的茶袋也进行同样的操作,测定质量Wb(g)。
(4)由Wa(g)-Wb(g)/聚合物的质量(g),求出吸水量(g)。
此外,所述两试验所使用的所述生理食盐水是含有0.9w/v%的氯化钠的食盐水(日本药局方·处方签医药品中的“生理食盐液”)。
在所述透液性正面片3与吸收体4之间,设置有亲水性的无纺布6作为第二片6。作为该第二片6,只要是相对于该体液具有亲水性的材料即可。具体而言,可使用通过采用人造丝或铜氨丝等再生纤维、棉等天然纤维而材料自身具有亲水性的材料,或使用通过亲水化剂对聚乙烯或聚丙烯等链烯烃类、聚酯类、聚酰胺类等合成纤维进行表面处理而赋予亲水性的无纺布,还也可使用通过射流喷网成布法、纺粘法、热粘合法、熔喷法、针刺法、热风法等适当的加工方法获得的无纺布。在这些材料中,特别期望采用热风无纺布。通过使用比较柔软且蓬松的热风无纺布,能给予缓冲性且穿着感良好,并且在透液性正面片4与气流成网吸收体4之间不产生间隙,确保连续性,因此体液容易向吸收体侧转移。第二片6的单位面积质量期望设为15~30g/m2。
在如前所述构成的生理用卫生巾1中,如图5所示,向透液性正面片3的上表面排出的体液U通过所述微小孔8而向吸收体4侧转移,但所述凹部9暂时起到容器的作用,因此体液U容易从所述微小孔8迅速流出。另外,在凸部的部分体液U相对较快地消失,因此相对于肌肤的的潮湿感也较早地消失。
另外,在所述立体开孔网片3A上没有形成与微小孔8不同的、开孔面积相对较大的流体通过孔,因此高吸收性聚合物不会向外脱离。所述高吸收性聚合物A层12使用具有吸收速度相对较高的物理参数的材料,所述高吸收性聚合物B层13使用吸收容量相对较高的物理参数的材料。因此,能够迅速地将从正面片3流入的体液U向吸收体引入。另外,关于体液U,通过所述高吸收性聚合物B层13,即使是薄型的气流成网吸收体,也能够保持较多的体液,能够实现吸收量的增大。高吸收性聚合物分成A层12、B层13而层状地配置,因此不会不均地配置,难以引起外形破坏。
〔其他方式例〕
(1)上述方式例中,同样地形成高吸收性聚合物A层12,但为了防止凝胶阻塞,也可以散布不存在高吸收性聚合物的部分。
标号说明
1…生理用卫生巾、2…不透液性反面片、3…透液性正面片、4…吸收体、5…皱纹纸、6…第二片、7…微小凸部、8…开孔、9…凹部、10A~10C…浆粕气流成网无纺布层、12…高吸收性聚合物A层、13…高吸收性聚合物B层。
Claims (5)
1.一种吸收性物品,在透液性正面片与反面片之间设置有吸收体,其特征在于,
所述透液性正面片使用形成有向肌肤侧突出的多个微小凸部,并且将这些微小凸部的顶面设成开孔的立体开孔网片,对于该立体开孔网片通过机械压花处理而形成有向非肌肤面侧凹陷的多个凹部,
所述吸收体为从所述透液性正面片侧起依次为浆粕气流成网无纺布层、高吸收性聚合物A层、浆粕气流成网无纺布层、高吸收性聚合物B层、浆粕气流成网无纺布层的5层结构的气流成网吸收体,构成所述高吸收性聚合物A层的高吸收性聚合物使用具有与构成所述高吸收性聚合物B层的高吸收性聚合物相比吸收速度相对较高的物理参数的材料,构成所述高吸收性聚合物B层的高吸收性聚合物使用具有与构成所述高吸收性聚合物A层的高吸收性聚合物相比吸收容量相对较高的物理参数的材料。
2.根据权利要求1所述的吸收性物品,构成所述高吸收性聚合物A层的高吸收性聚合物的基于下述<吸水速度试验>的吸收速度小于40(s),
<吸水速度试验>
(1)向100ml烧杯放入生理食盐水50ml和搅拌管芯,将烧杯载置于磁性搅拌器;
(2)使磁性搅拌器的转速为600±60次,在生理食盐水产生旋涡之后迅速向烧杯中添加2.0g;
(3)使用秒表,计测从聚合物添加后起直至液面的旋涡收敛的时间点为止的时间(s),作为吸收速度(s)。
3.根据权利要求1或2所述的吸收性物品,构成所述高吸收性聚合物B层的高吸收性聚合物的基于下述<吸水量试验>的吸水量为70(g)以上,
<吸水量试验>
(1)将聚合物0.5g放入茶袋(200网眼尼龙制袋),放入200ml烧杯,并向200ml烧杯放入生理食盐水100ml;
(2)浸渍30分钟,浸渍后悬吊5分钟而将水控去,测定质量Wa(g);
(3)对未放入聚合物的茶袋也进行同样的操作,测定质量Wb(g);
(4)由Wa(g)-Wb(g)/聚合物的质量(g),求出吸水量(g)。
4.根据权利要求1~3中任一项所述的吸收性物品,在所述透液性正面片与吸收体之间设置有热风无纺布。
5.根据权利要求1~4中任一项所述的吸收性物品,关于所述吸收体,单位面积质量为150~200g/m2,高吸收性聚合物相对于吸收体的全重量的配合重量为30~50重量%,构成所述高吸收性聚合物A层的高吸收性聚合物/构成所述高吸收性聚合物B层的高吸收性聚合物的重量比率为1~1.5,整体的厚度为2mm以下。
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EP3207906A1 (en) * | 2014-01-31 | 2017-08-23 | Ontex BVBA | Multi-layer absorbent material |
BR112018009148A8 (pt) * | 2015-12-11 | 2019-02-26 | Tredegar Film Prod Corp | ?película hidroformada com microaberturas tridimensionais? |
JP6351648B2 (ja) | 2016-03-23 | 2018-07-04 | ユニ・チャーム株式会社 | 吸収性物品 |
JP6329983B2 (ja) * | 2016-03-24 | 2018-05-23 | 大王製紙株式会社 | 吸収性物品 |
US10806640B2 (en) * | 2016-03-30 | 2020-10-20 | Basf Se | Ultrathin fluid-absorbent article |
JP7100589B2 (ja) * | 2016-04-19 | 2022-07-13 | フィテサ フィルム プロダクツ エルエルシー | 微小突起を有する起伏形成フィルム |
US10813797B2 (en) | 2017-06-22 | 2020-10-27 | The Procter & Gamble Company | Laminate webs and absorbent articles having the same |
CN113397420B (zh) * | 2021-05-10 | 2022-08-16 | 泉州尧盛纸品有限公司 | 一种婴幼儿用环保型湿巾及湿巾盒 |
CN113786284B (zh) * | 2021-08-31 | 2022-06-10 | 福建恒安集团有限公司 | 一种纸尿裤芯体制作工艺 |
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CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191206 |