CN1098617A - 吸收性物品及控制其穿戴处的湿度的方法 - Google Patents

吸收性物品及控制其穿戴处的湿度的方法 Download PDF

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CN1098617A
CN1098617A CN94107213A CN94107213A CN1098617A CN 1098617 A CN1098617 A CN 1098617A CN 94107213 A CN94107213 A CN 94107213A CN 94107213 A CN94107213 A CN 94107213A CN 1098617 A CN1098617 A CN 1098617A
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absorbent commodity
hygroscopic
humidity
absorber
layer material
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CN1126524C (zh
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田中雅仁
福原弥生
中西稔
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Kao Corp
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Abstract

本发明提供一种吸收性物品，包含液透性表面层 材、液不透过性防漏材制成的里面层、及位在两者间 的吸收体。该吸收性物品具有使其吸湿量在 35℃/75％RH环境下每单位面积为7.2× 10-4g/hr·cm2以上，全吸湿量为0.1g/hr的吸湿 材；利用该吸收性物品的吸湿材吸收使用者所产生的 湿气，经由液不透过性防漏层材将湿气释放到外部， 使用者的肌肤与吸收性物品的肌肤接触面间的湿度 能够控制在湿度70％RH以下。

Description

本发明涉及一种用后即弃型尿布、失禁垫片、卫生巾等的吸收性物品，以及使用吸收性物品时可控制穿戴处的湿度上升的方法。
一般的吸收性物品包含具有可透过液体的表面层、由不可透过液体的吸收体。为了达到可迅速吸收液体，且防止所吸收的液体逆流，以发挥防漏效果，以往的吸收性物品不断地增加其吸收性能，而随着吸收性能的提高，增加了每一片吸收性物品的使用时间，使用者与吸收性物品的接触部位暴露在长时间的湿热压力下，会造成皮肤搔痒、斑疹等不适。
以往在减少闷热感、湿粘感，例如，使用疏水性微细纤维集合体作为表面层的材料，在身体表面与吸收体间形成疏水空间，不会影响液体透过性且提高液体逆流的抑制性能。再例如，使用具有开孔的疏水性薄膜作为表面层的材料，以提高吸收体所吸收液体的逆流抑制性能。以上的技术是藉由提高液体的逆流抑制性能，也就是防止吸收性物品吸收体所吸收的液体渗入表面层与肌肤间，减少肌肤与液体直接接触的机会，以降低闷热感、湿粘感。
上述的技术中，只是减少肌肤与体液直接接触的机会，吸收性物品所吸收的水分仍会因体温而蒸发，然后扩散到肌肤上，虽然上述的技术可使液体逆流抑制性能达到最高，但是仍然无法消除闷热感及湿粘感。
本发明的目的在于提供一种以舒适材料制成的用后，即弃的尿布、失禁垫片、卫生巾等的吸收性物品，可有效地降低使用时的湿度，无闷热湿粘且不会引起搔痒、湿疹等的皮肤问题。
本发明的特征，在于将一种吸湿材装于吸收性物品上，藉由吸湿材与具有特定透湿度的液不透过性防漏层材，使吸收性物品的吸湿量在一定量以上，进而徐缓地放出水分，以达到无闷热湿粘的目的。
本发明的吸收性物品，包含可透过液体的表面层材、不可透过液体的防漏层材、及位于此两层材间的吸收体，上述可透过液体的防漏层材是由透湿度为0.7g/100cm2·hr以上的透湿层材所构成的，前述吸收性物品具有吸湿材，前述吸收性物品的吸湿量在35℃/75%RH（相对湿度）环境下每单位面积为7.2×10-4g/hr·cm2以上，而且，全吸湿量为0.1g/hr以上。
本发明还提供一种控制吸收性物品穿戴处湿度的方法，使用该吸收性物品时，利用吸收性物品的吸湿材吸收使用者所产生的湿气，并经由不透过液体的防漏层材将湿气释放到外部，使得使用者的肌肤与吸收性物品的肌肤接触面间的湿度能够控制在温度70%RH以下。
下面结合附图及实施例对本发明的吸收性物品及控制其穿戴处的湿度的方法进行详细说明：
图1    是本发明的吸湿性物品优选实施例1的部分剖面斜视图。
表1是本发明的吸湿性物品优选实施例1～5与比较实施例1、2评价每单位时间的吸湿量、穿戴处湿度控制效果及材质的比较表。
表2是本发明的吸湿性物品较佳实施例6～9与比较实施例3、4评价每单位时间的吸湿量、穿戴处湿度控制效果及材质的比较表。
本发明的吸收性物品，例如用后即弃的尿布、失禁垫片，具侧翼型或无侧翼型的卫生巾等，其包含具有液透性的表面层、液不透性防漏层材构成的里面层及介于两者间可吸收保存液体的吸收体。上述液透性的表面层及吸收体。与以往构造相同，本发明的特征在于：该吸收性物品具有吸湿材，且液不透性里面层是由具有特定透湿度的透湿层材所构成的，吸收性物品具有特定的吸湿量，使穿戴者的肌肤表面可经常保持干燥状态。
本发明吸收性物品前述特定的吸湿量是由该吸收性物品与肌肤接触的表面积来决定的，为了统一说明，以每单位面积的吸湿量来表示在本发明中，上述每单位面积的吸湿量在35℃%/RH环境下为7.2×10-4g/hr·cm2以上，优选的是3.0×10-3g/hr·cm2～7.0×10-3g/hr·cm2的范围。
上述吸收性物品整体的吸湿量如上所述也是由该吸收性物品与肌肤接触的表面积来决定的，例如在一般型的卫生巾中，在35℃/75%RH的环境下为0.10g/hr以上，优选最0.35～1.00g/hr的范围。若该吸湿量不足0.1g/hr时，使无液体的排泄，吸收性物品所覆盖的部位的湿度仍会随着使用时间的经过而上升，而无实用性。
本发明中吸湿材所使用的成分并无特别限定，优选的是不含对于人体有害或具刺激性的成分，尤其是含有可溶于水的成分时，导致在使用时，因该成分会溶解在液体中，而有接触肌肤的危险性，所以，该吸湿材使用不溶于水的材料或是在可溶于水的材料上作不溶化处理。
该吸湿材的吸湿量必须在35℃/75%RH的环境下为0.08g/g·hr以上，优选的是在0.10g/g·hr以上，更优选的是在0.20～1.20g/g·hr的范围，最优选的是在0.35～1.20g/g·hr的范围，为了达到充分的吸湿能力，则吸湿材必须增加数量，因此增加了成本及吸收性物品的重量。
上述吸湿材的不溶于水材料可举例于下述①-③：
①活性碳、天然或合成二氧化硅、合成沸石等使水分物理化学性地吸附于其表面的无机和/或有机多孔体中。
②下述（1）、（2）等的亲水性聚合体
（1）聚丙烯酸钠交联体;淀粉-聚丙烯酸接枝聚合体;亲水性聚氨基甲酸酯;具有羧酸酯、磺酸酯或硫酸酯的单体、及具有磷酸酯或亚磷酸酯基的单体的共聚合体等公知高吸收性聚合体。
（2）未交联的聚丙烯酸钠、羧甲基纤维素（CMC）、聚乙烯吡咯烷酮（polyvinyl    pyrrolidone）、聚乙烯基砜（polyvinylsulfong）等的上述高吸收性聚合体以外的亲水性聚合体。
③二氧化硅（silica）凝胶吸收蒸气或液体形式的水分而膨润的水溶性有机/无机亲水性凝胶。
上述的高吸收性聚合体具有反覆吸湿与放湿的性质，所以，如果使用可透过液体的层材作为里面层时，被吸收的湿气会从液透性层材释出，让使用者的肌肤经常处于干燥状态。
上述吸湿材使用可溶于水的材料，举例如下：氯化锂、氢氧化钠等具有潮解性的盐类、五氧化二磷、金属钠、氧化钙、铁粉等吸收水分的物质（以上材料虽然含有不溶于水，例如氧化钙、氧化铁、氢氧化铁等材料，但会产生极微量溶于水的离子，对于人体也具有危险性，原则上必须实施不溶化处理）。
上述可溶于水的材料可藉由以下的方法做不溶化处理：以非结晶性聚乙烯、聚苯乙烯、聚丙烯等的水蒸气透过性高的聚合体涂布于上述材料上、或是将以上的聚合体湿合或复合，由前述聚合体所构成的薄膜包住上述材料。前述聚合体可为单一组合，也可为复数聚合体的混合，或为复数单体的共聚合体等的组成。
上述薄膜是使用具有多个微细孔、且具有高水蒸气透过性的透湿层材。
吸湿材的使用量只要在上述吸收性物品的吸湿量的范围就可以，例如，使用上述高吸收性聚合物作为卫生巾的吸湿材时的使用量优选是0.7g以上，再优选是1.0g以上，更优选是1.5～10g，最优选是2～10g。若上述使用量不足0.7g，吸湿作用会降低，若超过10g，会降低吸收性物品的柔软性。
上述高吸收性聚合体的每单位面积的必要量也由吸收性物品与肌肤接触的表面积来决定物品的大小，但较优选是在5.0×10-3g/cm2以上，最优选是在1.5×10-2～7.6×10-2g/cm2的范围。
该吸收性物品含有吸湿材的形式，可举例于下述①-④：
①使用吸湿材作成可透过液体的表面层或吸收体。
②吸收体的材料中混合有上述吸湿材。
③以吸湿材形成吸湿体，使该吸湿体与上述吸收体成为一体。
④在液透过性表面层与吸收体间，或吸收体与不可透过液体的里面层间配置吸湿体。
上述①的形式可使用吸湿性的亲水膜作为表面层的方法，或是使用具有亲水性聚氨基甲酸酯或羧酸酯、磺酸酯或硫酸酯基的单体，与具有磷酸酯或亚磷酸酯基的单体共聚合体的发泡体等作为吸收体的方法来形成。
上述②的形式是可使用混有吸湿性亲水纤维的无纺布，或是将聚丙烯酸钠交联体或淀粉-聚丙烯酸接枝聚合体等的高吸收性聚合体混合于吸收体的方法来形成。
上述③的形式是可由以下的方法来形成：将以水蒸气透过性膜包住上述吸湿材所构成的吸湿体设置在吸收体下部而与该吸收体成为一体，或是以上述吸湿体作为有孔构造体，而设置在吸收体上部、或吸收体内部而与该吸收体成为一体的方法，或是将上述吸湿材封入一胶囊内部而形成吸湿体，再将制好的吸湿体分散在吸收体中。
上述①及③的形式也可藉由下述方法形成：使用一包夹有吸湿材的水蒸气透过性膜、或上述吸湿材分散于内部的水蒸气透过性膜作为各构件的材料。
上述④的形式可藉由下述的方法来形成：将吸湿体配置在上述液透性里面层与吸收体间。
通常，吸收体所广泛使用的纸浆、人造丝（rayon）等的亲水性纤维材料虽然具有吸湿性，对于降低闷热感、湿粘则无法显现充分的吸湿能力，而经过绝对干燥处理，可满足上述优选吸湿量的吸湿材。
也就是说，将以往的吸收性物品置于抽真空的环境中后（绝对干燥状态），以高结晶性聚乙烯的厚膜、或Saran树脂的薄膜等富气体阻碍性的包装材料进行密封，可以使由纸浆等构成的吸收体成为一种可满足上述吸湿量的吸湿材制成的吸湿体。
本发明吸收性物品的液不透性里面层的材料无特别限定，可使用吸收性物品的里面层材，但是，以使用透湿层材较为优选。
上述透湿层材可使用具有多个微细孔、且具有高水蒸气透过性的层材等，例如利用一将聚乙烯膜（混有碳酸钙、硫酸钡等的无机粉体、尼龙、聚苯乙烯等的无相溶性的有机高分子）单轴或双轴延伸所得到的、且具有微细孔、高水蒸气透过性的层材。
具体而言，可举例如下：使每单位面积量20～50g/m2的聚乙烯膜（含有平均粒径0.5～10μm的碳酸钙等30～60重量%）朝MD方向2倍延伸的透湿膜（每单位面积重量13～28g/m2）等。
此外，上述透湿层材也可使用拒水性无纺布（awater-repellent    non-woven    fabric）、或上述的层材与该拒水性无纺布的复合层材。
上述透湿层材的透湿度优选是0.7g/100cm2·hr以上，更佳是1.0～4.0g/100cm2·hr。若上述透湿度不足0.7g/100cm2·hr，会阻碍水分朝外部徐缓放出。
如果使用一般的透湿层材作为里面层的吸收性物品，与利用非透湿性层材作为里面层的吸收性物品相比，虽然在排泄时具有低湿度的功能，但是无法控制伴随使用者因动作或发汗所引起的穿戴处的温度上升，而且，大量排泄时，就无法发挥效果，所以，优选是使用具有上述透湿度的透湿层材。
如果只使用吸湿材的吸收性物品，排泄时具有吸收水份而迅速地使温度下降的功能，的确是比一般的透湿性里面层材具有更好的每单位时间温度降低量，但是，当大量排泄时，此功能会逐渐消失。
并用上述吸湿材与透湿层材的吸收性物品中，使用初期吸湿材可发挥短时间内压抑发汗/排泄所产生的水分的效果。此外，藉由透湿层材使吸湿材保持的水分及多余的水分徐缓放出至吸收性物品的外部，长时间使用时及大量排泄时仍可有持续且充分的效果。
并用上述吸湿材及透湿材的吸收性物品，即使将其吸湿量设定在上述范围更低的值，也可以得到所期望的结果。
本发明的吸收性物品使用时穿戴处控制湿度方法，当使用吸收性物品时，藉由其具备的吸湿材吸收使用者所产生的湿气，并经由液不透过性里面层材释放至外部，让使用者的穿载处与吸收性物品的肌肤接触面间的湿度上升能够控制在湿度70%RH以下，优选是在36～65%RH的范围。
本发明的穿载处控制湿度的方法，适宜使用上述的本发明吸收性物品，特别是由不可透过液体的里面层材具有上述透湿度的透湿材所构成的本发明吸收性物品。
本发明吸收性物品如上述所述因具有吸湿材，所以，可有效地将穿戴处所产生的湿气以上述吸湿量吸湿，而且，由不可透过液体的里面层材具有上述透湿度的透湿层材所构成时，可有效地以上述透湿度将湿气及水分释出到外部。
以下是本发明具体实施例的说明：
实施例1
经烷基磷酸酯与山梨聚糖脂肪酸酯的混合表面活性剂0.34wt%附着的聚乙烯/聚丙烯复合纤维（チシソ（股）制、NBF）制成每单位面积重量25%g/m2的干式热粘合无纺布（a dry thermally bonded non-woven fabric），将低密度聚乙烯（三井石油化学工业（股）制，ヮルトゼシクス15101c）25μ积层于此干式热粘合无纺布上，再施予加热开孔，而得到凹部的形成密度为52个/cm2的表面层材。于此凹部的侧壁部的开孔大小为0.1～2mm2。
使用所得到的表面层材，制成图1 所示的卫生巾。图1 是表示本发明的吸收性物品其中一种实施态样（卫生巾）的一部分剖面斜视图，图1 中，卫生巾10是包含有：具有以上述表面层材所形成的凹部14的表面层11、由积层聚乙烯的不可透过液体的防漏层材所构成的里面层12、设置于表面层11与该里面层12间由密度0.06g/cm2、每单位面积重量300g/m2、厚度5mm的纸浆层所构成的吸收体13、以及止滑用热融粘着剂（图中未示出）。
将该卫生巾置于真空炉内后，经一整夜抽真空（以上的处理称为绝对干燥处理）。绝对干燥处理终了后，从炉内取出卫生巾、迅速地装入40μ的聚乙烯制袋子，热密封袋子的开孔部，得到本发明品1。
实施例2
除了以每单位面积重量33g/m2的吸收纸挟持高吸收性聚合体（吸湿材）（花王（株）制、ヮソタ-ジエル）2g成为一体的长175mm、幅宽70mm的吸收体以外，其余与实施例1相同，作成本发明品2。
实施例3
使用一种将预先绝对干燥处理过的二氧化硅凝胶（吸湿材）（和光纯药（股）制）3g均一分散于密度0.06g/cm2、每单位面积重量300g/m2、厚5mm的纸浆层材，来形成吸收体，其余同于实施例1，作成卫生巾。然后，迅速地置入厚40μ的聚乙烯制的袋子中，热密封袋子的开孔部，而得本发明品3。
实施例4
除使用一种将一以透湿膜（透湿度1.7g/100cm2·hr）封入氯化锂1g（吸湿材）且长175mm、幅70mm、厚1.5mm的吸收体设置在0.06g/cm2、每单位面积重量300g/m2、厚5mm的纸浆层材的下部而形成一体的吸收体以外，其余同于实施例1，作成本发明品4。
实施例5
对一以透湿膜（透湿度1.7g/100cm2·hr封入氯化锂1g且长175mm、幅70mm、厚1.5mm的层材随机地钻穿直径5mm的孔。此时，孔的边缘被热密封，全体约有密度约1.5个/cm2的孔，而作成一内部的氯化锂不露出于外的有孔吸湿体。以两片密度0.06g/m2、每单位面积重量300g/m2、厚2.5mm的纸浆层材挟持该有孔吸湿体并形成一体而得吸收体。除了使用所得到的吸收体外，其余相同于实施例1，作成卫生巾，而得本发明品5。
实施例6
使用实施例1所得到的表面层，作成图1所示的卫生巾。图1是表示本发明吸收性物品其中一种实施态样（卫生巾）的部分剖面斜视图，图1中，卫生巾10包含具有以上述表面层材料所形成的凹部14的表面层11、由透湿层材料所构成的里面层12、设置在表面层11与里面层12间且以每单位面积重量为33g/m2的吸收性聚合体（花王制、商品、ヮソダ-ジエル）1.3g而形成一体的长175mm、幅宽70mm的吸收体13、以及止滑用热融粘着剂（图中未示出），以此作为本发明品6。由上述透湿性质材所构成的里面层12，是使用含有平均粒径0.7μm的碳酸钙45重量%的每单位面积重量40g/m2聚乙烯膜于MD方向延伸2倍而形成的每单位面积重量20g/m2透湿膜。
实施例7
将预先处理过的二氧化硅凝胶（和光纯药（股）制）1.8g均匀地分散在密度0.06g/cm2、每单位面积重量300g/m2、厚5mm的纸浆层材上而成吸收体，其余相同于实施例6而作成卫生巾。然后，迅速地装入厚40μm的聚乙烯制袋子，且热密封袋子的开孔部，而得本发明品7。
实施例8
使有一种将以一透湿膜（透湿度1.7g/cm2·hr）封入氯化锂0.5g（吸湿材）且长175mm、幅宽70mm、厚1.5mm的吸收体设置在密度0.06g/cm2、每单位面积重量300g/m2、厚5mm的纸浆层材的下部而形成一体的吸收体，其余同于实施例6，作成卫生巾而得本发明品8。
实施例9
对一以透湿膜（透湿度1.7g/100cm2·hr）封入氯化锂0.2g 且长175mm、幅70mm、厚1.5mm的层材随机地钻穿直径5mm的孔。此时，孔的边缘被热密封，约有密度约1.5个/cm2的孔，作成一内部的氯化锂不露出于外的有孔吸湿体。并以两片密度0.06g/m2、每单位面积重量300g/m2、厚2.5mm的纸浆层材挟持该有孔吸湿体形成一体而得吸收体。除了使用所得到的吸收体外，其余相同于实施例6，作成卫生巾，而得本发明品9。
比较例1
以实施例1作成的卫生巾而不经绝对干燥处理，制成比较品1。
比较例2
除使用一于每单位面积重量33g/m2的吸收纸间挟持高吸收性聚合体（花王（股）制、ヮソダ-ジエル）0.2g的长175mm、幅70mm的吸收体以外，其余同于实施例1，作成卫生巾，得到比较品2。
比较例3
除使用密度0.06g/m2、每单位面积重量300g/m2、厚5mm的纸浆层材作为吸收体以外，其余同于实施例6，作成卫生巾而得比较品3。
比较例4
除使用一于每单位面积重量33g/m2的吸收纸间挟持高吸收性聚合体（花王（股）制、ヮソダ-ジエル）0.2g的长175mm、幅70mm的吸收体以外，其余同于实施例6，作成卫生巾，得到比较品4。
上述所得到的本发明品及比较品，分别评价每单位时间的吸湿量、穿戴处湿度控制效果及材质。如表1、2表示本发明品及比较品的吸湿材的吸湿量A、卫生巾的吸湿量A’、每单位面积的吸湿量A”、穿载处湿度控制效果（穿载后的湿度h0（%RH）、穿戴3.5小时后的湿度h1（%RH）、穿戴前后的湿度变化δh的平均值）、材质评价结果（1）湿粘、（2）闷热感、（3）整体的使用感）。评价方法表示于下：
1）每单位时间的吸湿量
在测定吸湿材的吸湿量时，是将可称量至0.01g的天秤（メトテ-（股）制、电子天平、PM4000）设置于35℃/75%RH的环境可变室中，此天平充分适应环境后，预先载置精称过的吸湿材并放置2小时。以此前后的重量增加分为W1，原来的吸湿材的重量为WO，则可依下述式求取此吸湿材的吸湿量A。
A    [g/g·hr]＝w1[g]/wo[g]·[hr]
可依同样的方法测定卫生巾的吸湿量A’，而以下述式计算。
A’[g/hr]＝w1[g]/2[hr]
每单位面积的吸湿量A”，是假设所使用的吸收性物品的吸收体面积S，再依下述方式计算。
A”[g/m2·hr]＝w1[g]/S[cm2]·[hr]
2）着装内湿度控制效果
将卫生巾穿戴于测试者的股间部，而于试样接触面与穿载处的肌肤间插入温湿度感测器（第1科学（股）制、THP13），以20名的女性为测试者进行同样的测定，分别求取穿戴后的湿度ho（%RH）、穿戴3.5小时后的湿度h1（%RH）、及穿戴前后的湿度变化δh（%RH）的平均值，作为穿戴处湿度控制效果的标准。
3）材质评价
测试者以通常的使用条件穿戴卫生巾，有关本发明品1～5及比较品1、2为2.0小时以上，而本发明品6～9及比较品3～5为3小时以上，以下述（1）～（3）的项目调查其使用感觉。
（1）湿粘感
1-湿粘
2-略湿粘
3-中等
4-略无湿粘
5-无湿粘
（2）闷热感
1-闷热
2-略闷热
3-中等
4-略无闷热
5-无闷热
（3）整体的使用感
1-厌恶
2-略厌恶
3-中等
4-略佳
5-佳
调查中，有关各别的项目选择最接近自己的感觉的编号。对于20名测试者进行调查，求取各项目所选择的编号的平均值，此平均值对于各项目有以下的意义：
（1）湿粘感
值愈小愈感觉强烈湿粘感。于3左右为中等，愈大则愈不感湿粘感。
（2）闷热感
值愈小愈感觉强烈闷热感。于3左右为中等，愈大则愈不感闷热感。
（3）整体的使用感
值愈小使用感愈差。于3左右为中等，愈大表示使用感愈佳。
1）透湿度单位为g/100m2·hr
从表1的结果可知，以每单位时间的吸湿量具有0.2g/g·hr以上的吸湿材，卫生巾的吸湿量可为0.2g/g·hr以上。具有吸湿功能的卫生巾经过2小时可抑制穿戴处湿度环境。而且，大量使用拥有高吸收性聚合体、氯化锂等优异吸湿性能的吸湿材料的卫生巾（实施例2、4、5），穿戴处湿度环境从穿戴后经过2小时后的湿度上升至80～90%，已达令人无法忍受的程度。所以，为了达到让使用者感觉可以接受的程度，如实施例1及3，卫生巾的吸湿量必须在0.2g/hr以上。
从表2的结果可知，具有吸湿功能及透湿功能的卫生巾经过3.5小时仍可充分抑制穿戴处内湿度环境。特别是比较大量地使用拥有高吸收性聚合体、氯化锂等优异吸湿性能的吸湿材料的卫生巾（实施6、8），穿戴处湿度环境从穿戴后经过3.5小时几乎不变。而不具特别吸湿功能的卫生巾只有透湿的功能，水分移动的驱动力基本上为内外的水蒸气压差，因短时间内不会放出充分的水分，所以不能充分抑制穿戴处湿度。
在实施例6～9中，可提供使用者的接触肌肤经常维持干燥状态，所以比较例中只具有吸湿或透湿其中一种功能是不够的。
以上本发明的实施例，是以使用卫生巾来说明的，但是，本发明不限于此一种状态，也可使用其他的吸收性物品，例如用后即弃的尿布、失禁垫片等。
表1
Figure 941072134_IMG2
表2

Claims (7)

1、一种吸收性物品，是由液透性表面层材、液不透过性里面层材、及位于此两层材间的吸收体所构成的，其特征在于：该吸收性物品具有吸湿材，所述吸收性物品的吸湿量在35℃/75%RH环境下每单位面积为7.2×10-4g/hr·cm2以上，而且，全吸湿量为0.1g/hr。
2、如权利要求1所述的吸收性物品，其特征在于：所述的吸湿材为亲水性聚合物。
3、如权利要求2所述的吸收性物品，其特征在于：所述的吸湿材为高吸收性聚合物。
4、如权利要求3所述的吸收性物品，其特征在于：
所述的高吸收性聚合物的每单位面积的使用量为5.0×10-3g/cm2以上，且全使用量为1.0g以上。
5、如权利要求1所述的吸收性物品，其特征在于：
所述的液不透过性里面层材是由透湿度为0.7g/100cm2·hr以上的透湿层材所构成。
6、如权利要求1所述的吸收性物品，其特征在于：
所述的吸湿材是置于吸收体中的。
7、一种使用吸收性物品控制穿戴处湿度的方法，其特征在于：
使用者在穿戴吸收性物品时，所述的吸收性物品具有吸湿材吸收使用者所产生的湿气并且湿气透过不可透过液体的里面层材释放至外部，将使用者的穿戴处与吸收性物品的肌肤接触面间的湿度控制在70%RH以下。
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