JP2002159533A - Absorptive article - Google Patents
Absorptive articleInfo
- Publication number
- JP2002159533A JP2002159533A JP2000359591A JP2000359591A JP2002159533A JP 2002159533 A JP2002159533 A JP 2002159533A JP 2000359591 A JP2000359591 A JP 2000359591A JP 2000359591 A JP2000359591 A JP 2000359591A JP 2002159533 A JP2002159533 A JP 2002159533A
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- heat
- fusible
- fiber
- nonwoven fabric
- 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.)
- Pending
Links
Landscapes
- Nonwoven Fabrics (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、軽量・コンパクト
で、吸収体のよれや壊れがなく、液漏れが防止された吸
収性物品に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article which is lightweight and compact, has no deformation or breakage of an absorber, and prevents liquid leakage.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】吸収性
物品は、その構成や使用材料の改良により、その包装体
のコンパクト化が進んでいる。吸収性物品自体をコンパ
クトにする手段として、吸収体中のフラッフパルプの使
用量を低減し、それに代えて高吸収性ポリマーの使用量
を増加させることが知られている。しかし、フラッフパ
ルプの使用量を極端に低減させると、フラッフパルプと
高吸収性ポリマーとの混合が困難になり、またパルプ繊
維同士の絡み合いが減少してしまうため、吸収性物品の
装着中に高吸収性ポリマーが移動して偏ったり、吸収体
がちぎれてしまい、これに起因して吸収体がよれたり壊
れて液漏れが生じ易くなる。2. Description of the Related Art Absorbent articles have been increasingly compact in size due to improvements in their structures and materials used. As a means for making the absorbent article itself compact, it is known to reduce the amount of fluff pulp used in the absorber and increase the amount of superabsorbent polymer used instead. However, if the amount of fluff pulp is extremely reduced, it becomes difficult to mix fluff pulp with a superabsorbent polymer, and entanglement between pulp fibers is reduced. The absorbent polymer moves and is deviated, or the absorbent is torn, whereby the absorbent is twisted or broken and liquid leakage easily occurs.
【０００３】高吸収性ポリマーを繊維基材と複合化した
不織布からなる、高吸収性ポリマーの脱落のない薄い吸
収体が、例えば特開平５−３３１７７５号公報、特開平
１０−３２９２５２号公報等において提案されている。
特開平５−３３１７７５号公報においては、高吸収性ポ
リマーの脱落を防止するために構成繊維に高吸収性ポリ
マーを分布させた後に、繊維の軟化温度に加熱、加圧し
て高吸収性ポリマーを固定している。また、特開平１０
−３２９２５２号公報においては、構成繊維中の熱融着
繊維が高吸収性ポリマーに熱融着することで高吸収性ポ
リマーを固定している。しかしながら、斯かる吸収体は
何れも構成繊維の網目構造により高吸収性ポリマーの膨
潤が抑制されるため、高吸収性ポリマーの添加量に応じ
た十分な吸収性能が得られないという問題がある。A thin absorbent made of a non-woven fabric in which a super-absorbent polymer is combined with a fiber base material without dropping of the super-absorbent polymer is disclosed in, for example, JP-A-5-331775 and JP-A-10-329252. Proposed.
In JP-A-5-331775, after the superabsorbent polymer is distributed in the constituent fibers in order to prevent the superabsorbent polymer from falling off, the superabsorbent polymer is fixed by heating and pressing to the softening temperature of the fiber. are doing. Also, Japanese Patent Application Laid-Open
In JP-A-329252, the heat-fusible fibers in the constituent fibers are heat-fused to the superabsorbent polymer to fix the superabsorbent polymer. However, in any of such absorbers, since the swelling of the superabsorbent polymer is suppressed by the network structure of the constituent fibers, there is a problem that sufficient absorption performance cannot be obtained according to the amount of the superabsorbent polymer added.
【０００４】従って、本発明の目的は、軽量・コンパク
トで、十分な吸収性能を有し、更には吸収体のよれや壊
れがなく、液漏が防止された吸収性物品を提供すること
にある。Accordingly, it is an object of the present invention to provide an absorbent article which is lightweight and compact, has a sufficient absorbing performance, and is free from spillage or breakage of the absorber and liquid leakage is prevented. .
【０００５】[0005]
【課題を解決するための手段】本発明は、液透過性の表
面シート、液不透過性の裏面シート及び液保持性の吸収
体を備えた吸収性物品において、前記吸収体は、高吸収
性ポリマーが不織布の構成繊維間に保持された構造を有
しており、該不織布は、熱融着性繊維及び該熱融着性繊
維同士の融着温度では該熱融着性繊維と融着しない非熱
融着性繊維を含み、該熱融着性繊維同士が熱風融着され
ている吸収性物品を提供することにより前記目的を達成
したものである。According to the present invention, there is provided an absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retentive absorber, wherein the absorber has a high absorbent property. The polymer has a structure in which the polymer is held between constituent fibers of the non-woven fabric, and the non-woven fabric does not fuse with the heat-fusible fibers at a fusion temperature between the heat-fusible fibers and the heat-fusible fibers. The object has been achieved by providing an absorbent article including non-heat fusible fibers, wherein the heat fusible fibers are fused by hot air.
【０００６】また本発明は、液透過性の表面シート、液
不透過性の裏面シート及び液保持性の吸収体を備えた吸
収性物品において、前記吸収体は、高吸収性ポリマーが
不織布の構成繊維間に保持された構造を有しており、該
不織布は、第１熱融着性繊維及び該第１熱融着性繊維と
は異なる第２熱融着性繊維を含み、これらの繊維が熱風
融着されており、前記第１熱融着性繊維及び前記第２熱
融着性繊維は、同種繊維同士の熱接着力よりも異種繊維
間の熱接着力が低いものであるか、又は異種繊維間では
熱接着しないものである吸収性物品を提供することによ
り前記目的を達成したものである。The present invention also relates to an absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retentive absorbent, wherein the absorbent comprises a non-woven fabric made of a highly absorbent polymer. Having a structure held between the fibers, the non-woven fabric includes a first heat fusible fiber and a second heat fusible fiber different from the first heat fusible fiber; The first heat-fusible fiber and the second heat-fusible fiber are hot-air-fused, and the heat-bonding force between different kinds of fibers is lower than the heat-bonding force between the same kind of fibers, or The above object has been achieved by providing an absorbent article which does not thermally bond between different kinds of fibers.
【０００７】[0007]
【発明の実施の形態】以下、本発明の吸収性物品をその
好ましい一実施形態に基づいて説明する。本実施形態
は、図１に示すように、いわゆる展開型の使い捨ておむ
つに係るものである。おむつ１は、液透過性の表面シー
ト２、液不透過性の裏面シート３、及び両シート２，３
間に介在された液保持性の吸収体４とを具備する。着用
者の背側に位置される背側部Ｂの左右両側縁部Ｂ１，Ｂ
２には、止着用のファスニングテープ１１が配されてい
る。腹側部Ａにおける裏面シート３の表面には、ファス
ニングテープ１１止着用の止着部が設けられている（図
示せず）。ウエスト部５にはウエスト弾性部材５１が設
けられている。一対のレッグ部６にはレッグ弾性部材６
１が設けられている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an absorbent article according to the present invention will be described based on a preferred embodiment. The present embodiment relates to a so-called deployable disposable diaper as shown in FIG. The diaper 1 includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and both sheets 2 and 3.
A liquid-retaining absorber 4 interposed therebetween. Left and right side edges B1, B of the back side B located on the back side of the wearer
2 is provided with a fastening tape 11 for fastening. A fastening part for fastening the fastening tape 11 is provided on the surface of the back sheet 3 in the abdominal part A (not shown). The waist portion 5 is provided with a waist elastic member 51. A leg elastic member 6 is provided on the pair of leg portions 6.
1 is provided.
【０００８】本実施形態のおむつ１においては、吸収体
４は、高吸収性ポリマーの粒子及び不織布を具備してい
る。高吸収性ポリマーの粒子は、不織布４２の構成繊維
間に保持されている。不織布４２としては、高吸収性ポ
リマーが吸液して膨潤したときに、その構成繊維の繊維
間距離が変化して、前記膨潤を阻害しないものが用いら
れる。In the diaper 1 of the present embodiment, the absorbent body 4 includes particles of a superabsorbent polymer and a nonwoven fabric. The superabsorbent polymer particles are held between the constituent fibers of the nonwoven fabric 42. As the non-woven fabric 42, a non-woven fabric that does not inhibit the swelling due to a change in the inter-fiber distance of the constituent fibers when the super-absorbent polymer absorbs liquid and swells.
【０００９】高吸収性ポリマーが吸液したときの膨潤を
阻害しない不織布としては、（１）熱融着性繊維及び該
熱融着性繊維同士の融着温度では該熱融着性繊維と融着
しない非熱融着性繊維を含む不織布（以下、「不織布
Ａ」という）、又は（２）第１熱融着性繊維及び該第１
熱融着性繊維とは異なる第２熱融着性繊維を含み、第１
熱融着性繊維及び第２熱融着性繊維は、同種繊維同士の
熱接着力よりも異種繊維間の熱接着力が低いものである
か、又は異種繊維間では熱接着しないものである不織布
（以下、「不織布Ｂ」という）が用いられる。以下、こ
れらの不織布について説明する。The non-woven fabric which does not hinder swelling when the superabsorbent polymer absorbs liquid includes: (1) heat-fusible fibers and the heat-fusible fibers at the fusion temperature of the heat-fusible fibers. Non-woven fabric containing non-heat-fusible fibers that do not adhere (hereinafter referred to as “non-woven fabric A”), or (2) first heat-fusible fibers and the first heat-fusible fibers
A second heat fusible fiber different from the heat fusible fiber,
The heat-fusible fiber and the second heat-fusible fiber are nonwoven fabrics in which the heat-bonding force between different kinds of fibers is lower than the heat-bonding force between the same kind of fibers, or the heat-bonding fiber does not bond between different kinds of fibers. (Hereinafter, referred to as “nonwoven fabric B”). Hereinafter, these nonwoven fabrics will be described.
【００１０】（１）不織布Ａについて 不織布Ａに含まれる熱融着性繊維としては、加熱すると
軟化して互いに融着する繊維が用いられる。具体例とし
ては、ポリエチレン（以下ＰＥという）、ポリプロピレ
ン（以下ＰＰという）等のポリオレフィン系繊維、ポリ
エチレンテレフタレート（以下ＰＥＴという）等のポリ
エステル系繊維、ナイロン等のポリアミド系繊維、塩化
ビニルや酢酸ビニル等のビニルモノマー重合体からなる
繊維等が挙げられる。熱融着性繊維は、これらの単一成
分からなるものでも、これらをバインダー成分とした２
種以上の成分を積層又は芯鞘等に複合化した繊維でもよ
い。熱融着性繊維の繊維長は１０〜１００ｍｍ、繊度は
１〜２０ｄ（＝１．１〜２２ｄｔｅｘ）とすることが、
不織布を形成した際に高吸収性ポリマーとの絡みが良好
になる点から好ましい。(1) Non-woven fabric A As the heat-fusible fibers contained in non-woven fabric A, fibers that soften when heated and fuse with each other are used. Specific examples include polyolefin fibers such as polyethylene (hereinafter referred to as PE) and polypropylene (hereinafter referred to as PP), polyester fibers such as polyethylene terephthalate (hereinafter referred to as PET), polyamide fibers such as nylon, and vinyl chloride and vinyl acetate. And the like. The heat-fusible fibers may be composed of these single components,
Fibers obtained by laminating more than one kind of components or complexing them into a core-sheath may be used. The fiber length of the heat-fusible fiber is 10 to 100 mm, and the fineness is 1 to 20 d (= 1.1 to 22 dtex).
It is preferable because the entanglement with the superabsorbent polymer becomes good when the nonwoven fabric is formed.
【００１１】不織布Ａに含まれる非熱融着性繊維として
は、熱融着性繊維同士が融着する温度、つまり熱融着性
繊維のバインダー成分が融着点を形成する温度（例えば
融点の±１５℃の範囲内の温度）では融着性を発現しな
い繊維が用いられる。非熱融着性繊維としては、フラッ
フパルプ、コットン、レーヨン繊維、ポリビニルアルコ
ール繊維等、実質的に融点を持たない繊維が好適に用い
られる。しかし、ＰＥやＰＰ等がバインダー成分となっ
ている熱融着性繊維を用いる場合には、該バインダー成
分よりも融点の高いポリエステルやポリアミド繊維等も
非熱融着性繊維として用いることができる。非熱融着性
繊維の繊維長は１０〜１００ｍｍ、繊度は１〜２０ｄ
（＝１．１〜２２ｄｔｅｘ）とすることが、不織布を形
成した際に高吸収性ポリマーとの絡みが良好になる点か
ら好ましい。As the non-heat-fusible fibers contained in the nonwoven fabric A, the temperature at which the heat-fusible fibers are fused to each other, that is, the temperature at which the binder component of the heat-fusible fibers forms a fusion point (for example, At a temperature within a range of ± 15 ° C.), a fiber that does not exhibit fusibility is used. As the non-heat-fusible fibers, fibers having substantially no melting point, such as fluff pulp, cotton, rayon fibers, and polyvinyl alcohol fibers, are preferably used. However, when a heat-fusible fiber having PE or PP as a binder component is used, a polyester or polyamide fiber having a higher melting point than the binder component can also be used as the non-heat-fusible fiber. The fiber length of the non-heat-fusible fiber is 10 to 100 mm, and the fineness is 1 to 20 d.
(= 1.1 to 22 dtex) is preferred from the viewpoint of good entanglement with the superabsorbent polymer when the nonwoven fabric is formed.
【００１２】熱融着性繊維と非熱融着性繊維との配合割
合は、重量比で熱融着性繊維／非熱融着性繊維＝９０／
１０〜４０／６０、特に７０／３０〜４０／６０である
ことが、高吸収性ポリマーの膨潤阻害の防止、不織布の
強度低下及びこれに起因する吸収体の壊れの防止の点か
ら好ましい。The mixing ratio of the heat-fusible fiber and the non-heat-fusible fiber is such that the weight ratio of the heat-fusible fiber / non-heat-fusible fiber is 90 /
The ratio of 10 to 40/60, particularly 70/30 to 40/60, is preferred from the viewpoint of preventing swelling of the superabsorbent polymer, reducing the strength of the nonwoven fabric, and preventing breakage of the absorbent due to this.
【００１３】不織布Ａは、熱融着性繊維及び非熱融着性
繊維を含むウエブを、エアスルー法による熱風処理に付
して、該熱融着性繊維の交点を熱風融着させて得られ
る。即ち、不織布Ａはエアスルー不織布である。これに
よって不織布Ａに嵩高性が付与され、高吸収性ポリマー
の粒子を多量に且つ確実に保持することが可能となる。
前記ウエブの形成手段としてはカード法やエアレイド法
が好適に用いられる。The non-woven fabric A is obtained by subjecting a web containing heat-fusible fibers and non-heat-fusible fibers to a hot-air treatment by an air-through method, and fusing the intersections of the heat-fusible fibers with hot air. . That is, the nonwoven fabric A is an air-through nonwoven fabric. As a result, bulkiness is imparted to the nonwoven fabric A, so that a large amount of the particles of the superabsorbent polymer can be reliably held.
As a means for forming the web, a card method or an air laid method is suitably used.
【００１４】不織布Ａは、熱融着性繊維及び非熱融着性
繊維を構成繊維としているので、熱融着性繊維同士はそ
の交点において融着しているが、熱融着性繊維と非熱融
着性繊維との交点及び非熱融着性繊維同士の交点は融着
されていない。つまり、不織布Ａには、融着された交点
と融着されていない交点とが混在し、繊維の自由度が高
い（繊維が動き易い）ため、高吸収性ポリマーを繊維に
よって絡めて担持する機能が十分にあり高吸収性ポリマ
ーの脱落が生じない。その上、非熱融着性繊維は、高吸
収性ポリマーが吸液によって膨潤するのに十分な繊維自
由度を有しているので、高吸収性ポリマーが吸液し膨潤
しても、それに追従して自由に動くことができ、繊維間
距離が変化し、高吸収性ポリマーの膨潤が阻害されな
い。Since the non-woven fabric A comprises the heat-fusible fibers and the non-heat-fusible fibers as constituent fibers, the heat-fusible fibers are fused at their intersections. The intersections with the heat-fusible fibers and the intersections between the non-heat-fusible fibers are not fused. That is, in the nonwoven fabric A, a fusion point and a non-fusion point are mixed, and the degree of freedom of the fiber is high (the fiber is easy to move). Is sufficient and the superabsorbent polymer does not fall off. In addition, the non-heat-fusible fibers have sufficient fiber freedom to allow the superabsorbent polymer to swell due to liquid absorption, so that even if the superabsorbent polymer absorbs liquid and swells, it will follow it. And the distance between the fibers changes, and the swelling of the superabsorbent polymer is not hindered.
【００１５】不織布Ａにおいては、その繊維密度を０．
００５〜０．２８ｇ／ｃｍ3、特に０．０１〜０．１ｇ
／ｃｍ3とすることが、高吸収性ポリマーを十分に繊維
に絡めて保持する点から好ましい。また不織布Ａにおい
ては、その坪量を２０〜８０ｇ／ｍ2、特に３０〜６０
ｇ／ｍ2とすることが、高吸収性ポリマーの多量の保
持、不織布の強度、コストの抑制の点から好ましい。[0015] In the non-woven fabric A, the fiber density is set to 0.
005 to 0.28 g / cm 3 , especially 0.01 to 0.1 g
/ Cm 3 is preferred from the viewpoint that the superabsorbent polymer is sufficiently entangled with the fiber and held. In the nonwoven fabric A, the basis weight is 20 to 80 g / m 2 , particularly 30 to 60 g / m 2 .
g / m 2 is preferable from the viewpoint of holding a large amount of the superabsorbent polymer, strength of the nonwoven fabric, and cost reduction.
【００１６】（２）不織布Ｂについて 不織布Ｂに用いられる第１及び第２熱融着性繊維として
はそれぞれ、前述した不織布Ａに用いられる熱融着性繊
維と同じものが用いられる。但し、高吸収性ポリマーが
吸液によって膨潤するのに十分な繊維自由度を確保する
ため、第１熱融着性繊維と第２熱融着性繊維とは、同種
繊維同士の熱接着力よりも異種繊維間の熱接着力が低い
ものであるか、又は異種繊維間では熱接着しないもので
あることが必要である。このためには、例えば、第１熱
融着性繊維及び第２熱融着性繊維におけるバインダー成
分を互いに相溶性の低いものとすればよい。具体的に
は、第１熱融着性繊維及び第２熱融着性繊維におけるバ
インダー成分がそれぞれ融着点を形成する温度（例えば
融点が高い方の繊維の該融点から±１５℃の範囲内の温
度）では熱融着しない程度に、両者の組成等を異ならせ
ればよい。このような性質を満たす第１及び２熱融着性
繊維の組み合わせとしては、例えば第１熱融着性繊維と
してＰＥをバインダー成分とする繊維を用いた場合に
は、第２熱融着性繊維としてＰＰをバインダー成分とす
る繊維を用いることが好ましい。第１熱融着性繊維及び
第２熱融着性繊維はそれぞれ、２種以上の繊維を混合し
て用いることもできる。(2) Nonwoven Fabric B As the first and second heat fusible fibers used for the nonwoven fabric B, the same heat fusible fibers used for the nonwoven fabric A described above are used. However, in order to ensure a sufficient degree of fiber freedom for the superabsorbent polymer to swell due to liquid absorption, the first heat fusible fiber and the second heat fusible fiber are based on the thermal adhesion between the same kind of fibers. Also, it is necessary that the heat bonding force between the different kinds of fibers is low or that the heat bonding between the different kinds of fibers is not performed. For this purpose, for example, the binder components in the first heat fusible fiber and the second heat fusible fiber may be low in compatibility with each other. Specifically, the temperature at which the binder component in each of the first heat-fusible fiber and the second heat-fusible fiber forms a fusion point (for example, within a range of ± 15 ° C. from the melting point of the higher melting fiber) At a temperature of (2), the compositions of the two may be made different from each other to such an extent that thermal fusion does not occur. As a combination of the first and second heat fusible fibers satisfying such properties, for example, when a fiber containing PE as a binder component is used as the first heat fusible fiber, the second heat fusible fiber may be used. It is preferable to use a fiber containing PP as a binder component. Each of the first heat fusible fiber and the second heat fusible fiber may be a mixture of two or more fibers.
【００１７】前記熱接着力とは、熱融着性繊維をバイン
ダー成分の融点以上に加熱し、該熱融着性繊維の交点を
融着させたときの接着力のことであり、以下の方法で測
定される。The above-mentioned thermal adhesive force is an adhesive force when the heat-fusible fiber is heated to a temperature not lower than the melting point of the binder component and the intersection of the heat-fusible fibers is fused. Is measured.
【００１８】＜熱接着力の測定方法＞図２(a)に示すよ
うな、中央部に正方形状の切り込みが入れられた型紙７
１に、２つの繊維７２、７２’をそれぞれ直交させて且
つ交点が前記正方形状の切り込みの中央に位置するよう
に載置し、接着剤にて該繊維７２、７２’を型紙７１に
接着する。次いで、この繊維７２、７２’が貼り着けら
れた型紙７１に、バインダ成分の融点以上（例えば融点
＋１０℃）の温風を、風速１〜３ｍ／ｓｅｃで、１０〜
２０秒間吹き付けて熱処理を行う。熱処理されて両繊維
が熱接着された型紙７１を図２(b)に示す点線に沿って
切断し、図２(c)に示すように各繊維７２、７２’の端
部がそれぞれ接着された正方形状の切片７３、７３’を
得る。次に、各切片７３、７３’をそれぞれ図２(c)に
示す矢印方向に５０ｍｍ／ｍｉｎの速度で引っ張り、前
記交点の強力を測定し、この値を熱接着力とする。<Measurement Method of Thermal Adhesive Force> A paper pattern 7 having a square cut in the center as shown in FIG.
1, two fibers 72, 72 'are placed so as to be orthogonal to each other and the intersection is located at the center of the square cut, and the fibers 72, 72' are bonded to the pattern 71 with an adhesive. . Next, a hot air having a temperature equal to or higher than the melting point of the binder component (for example, a melting point + 10 ° C.) is applied to the paper pattern 71 to which the fibers 72 and 72 ′ are attached at a wind speed of 1 to 3 m / sec for 10 to 10 m.
A heat treatment is performed by spraying for 20 seconds. The heat-treated paper 71 to which both fibers were thermally bonded was cut along the dotted line shown in FIG. 2 (b), and the ends of each fiber 72, 72 ′ were bonded as shown in FIG. 2 (c). Square sections 73, 73 'are obtained. Next, each section 73, 73 'is pulled in the direction of the arrow shown in FIG. 2 (c) at a speed of 50 mm / min, and the strength at the intersection is measured, and this value is defined as the thermal adhesive force.
【００１９】第１及び第２熱融着性繊維の繊維長はそれ
ぞれ１０〜１００ｍｍ、繊度はそれぞれ１〜２０ｄ（＝
１．１〜２２ｄｔｅｘ）とすることが、不織布を形成し
た際に、高吸収性ポリマーとの絡みが良好になる点から
好ましい。繊維長及び繊度は、第１及び第２熱融着性繊
維において同じであっても異なっていてもよい。The first and second heat-fusible fibers each have a fiber length of 10 to 100 mm and a fineness of 1 to 20 d (=
1.1 to 22 dtex) from the viewpoint of good entanglement with the superabsorbent polymer when the nonwoven fabric is formed. The fiber length and fineness may be the same or different in the first and second heat-fusible fibers.
【００２０】第１熱融着性繊維と第２熱融着性繊維との
配合割合は、重量比で、第１熱融着性繊維／第２熱融着
性繊維＝９０／１０〜１０／９０、特に７０／３０〜３
０／７０であることが、高吸収性ポリマーの膨潤阻害の
防止の点から好ましい。The mixing ratio of the first heat fusible fiber and the second heat fusible fiber is, by weight, first heat fusible fiber / second heat fusible fiber = 90/10 to 10 /. 90, especially 70 / 30-3
0/70 is preferred from the viewpoint of preventing swelling inhibition of the superabsorbent polymer.
【００２１】不織布Ｂは、前述した不織布Ａと同様にエ
アスルー不織布である。つまり、不織布Ｂに含まれる第
１熱融着性繊維及び第２熱融着性繊維は、交点で熱風融
着されている。これにより、不織布Ｂに嵩高性が付与さ
れて、高吸収性ポリマーの粒子を多量に且つ確実に保持
することが可能となる。The nonwoven fabric B is an air-through nonwoven fabric like the nonwoven fabric A described above. That is, the first heat fusible fiber and the second heat fusible fiber included in the nonwoven fabric B are hot air fused at the intersections. Thereby, the bulkiness is given to the nonwoven fabric B, and it becomes possible to hold | maintain the particle | grains of a superabsorbent polymer in large quantities and reliably.
【００２２】不織布Ｂにおいては、同種繊維同士の交点
は強固に熱風融着されているが、異種繊維の交点は融着
していないか、或いは融着していても非常に弱くしか融
着していない。従って、１種類の熱融着性繊維のみで不
織布を形成する場合よりも繊維の自由度の高い（繊維が
動き易い）不織布となる。その結果、不織布Ａと同様
に、高吸収性ポリマーを多量に担持でき、且つ高吸収性
ポリマーの膨潤阻害が防止される。In the nonwoven fabric B, the intersections of the same kind of fibers are strongly fused with hot air, but the intersections of the different kinds of fibers are not fused, or even if they are fused, they are very weakly fused. Not. Therefore, the nonwoven fabric has a higher degree of freedom of the fibers (the fibers move more easily) than when the nonwoven fabric is formed of only one kind of heat-fusible fiber. As a result, similarly to the nonwoven fabric A, a large amount of the superabsorbent polymer can be supported, and swelling inhibition of the superabsorbent polymer is prevented.
【００２３】不織布Ｂには、第１及び２熱融着性繊維に
加えて、これらの繊維とは異なる第３熱融着性繊維やそ
の他の繊維を配合することもできる。The nonwoven fabric B may contain, in addition to the first and second heat-fusible fibers, third heat-fusible fibers different from these fibers and other fibers.
【００２４】不織布Ｂにおいては、その繊維密度を０．
００５〜０．２ｇ／ｃｍ3、特に０．０１〜０．１８ｇ
／ｃｍ3とすることが、高吸収性ポリマーを十分に繊維
に絡めて保持する点から好ましい。また不織布Ｂにおい
ては、その坪量を２０〜８０ｇ／ｍ2、特に３０〜６０
ｇ／ｍ2とすることが、高吸収性ポリマーの多量の保
持、不織布の強度、コストの抑制の点から好ましい。In the non-woven fabric B, the fiber density is set to 0.
005 to 0.2 g / cm 3 , especially 0.01 to 0.18 g
/ Cm 3 is preferred from the viewpoint that the superabsorbent polymer is sufficiently entangled with the fiber and held. In the nonwoven fabric B, the basis weight is 20 to 80 g / m 2 , particularly 30 to 60 g / m 2 .
g / m 2 is preferable from the viewpoint of holding a large amount of the superabsorbent polymer, strength of the nonwoven fabric, and cost reduction.
【００２５】本発明における、高吸収性ポリマーの膨潤
阻害を防止しつつ高吸収性ポリマーを固定化する機構
を、不織布Ａを例にとり説明すると、図３(a) に示すよ
うに、不織布４２は、熱融着性繊維４２ａ及び非熱融着
性繊維４２ｂを含んでいる。熱融着性繊維４２ａ同士の
交点には融着交点４３ａが形成されている。一方、熱融
着性繊維４２ａと非熱融着性繊維４２ｂとの交点は非融
着交点４３ｂとなっている。吸液前においては、不織布
４２は、高吸収性ポリマー４１の粒子を固定化するのに
十分な大きさの網目構造Ｎを融着交点４３ａ及び非融着
交点４３ｂにより形成している。前述の通り、不織布４
２はその構成繊維の交点が熱風融着されているので嵩高
となり、その結果、網目構造Ｎも嵩高な三次元構造とな
る。従って、この網目構造Ｎ内に吸液前の高吸収性ポリ
マー４１の粒子はしっかりと且つ多量に固定化される。
高吸収性ポリマー４１が吸液した場合には、図３(b) に
示すように、非融着交点４３ｂが開放されるので、高吸
収性ポリマー４１が膨潤して体積膨張してもそれに応じ
て繊維、特に非熱融着性繊維が移動して繊維間距離が変
化し網目構造Ｎにおける網目の大きさが拡張される。そ
の結果、高吸収性ポリマー４１の膨潤阻害が効果的に防
止される。The mechanism for immobilizing the superabsorbent polymer while preventing the swelling of the superabsorbent polymer in the present invention will be described using nonwoven fabric A as an example. As shown in FIG. , Heat-fusible fibers 42a and non-heat-fusible fibers 42b. A fusion intersection 43a is formed at the intersection of the heat-fusible fibers 42a. On the other hand, the intersection between the heat-fusible fiber 42a and the non-heat-fusible fiber 42b is a non-fused intersection 43b. Before the liquid absorption, the nonwoven fabric 42 has a network structure N having a size sufficient to fix the particles of the superabsorbent polymer 41 formed by the fusion intersection 43a and the non-fusion intersection 43b. As described above, the nonwoven fabric 4
No. 2 is bulky because the intersections of the constituent fibers are fused by hot air, and as a result, the network structure N also has a bulky three-dimensional structure. Accordingly, the particles of the superabsorbent polymer 41 before liquid absorption are firmly and abundantly fixed in the network structure N.
When the superabsorbent polymer 41 absorbs liquid, as shown in FIG. 3 (b), the unfused intersection point 43b is opened, so that even if the superabsorbent polymer 41 swells and expands in volume, it will respond accordingly. As a result, the fibers, particularly the non-heat-fusible fibers, move to change the inter-fiber distance, thereby expanding the size of the mesh in the network structure N. As a result, swelling inhibition of the superabsorbent polymer 41 is effectively prevented.
【００２６】不織布Ｂにおいては、吸液により高吸収性
ポリマーが膨潤すると、異種繊維間の非融着交点又は弱
融着交点が開放され、繊維間距離が変化し網目構造にお
ける網目の大きさが拡張される。その結果、高吸収性ポ
リマーの膨潤阻害が効果的に防止される。In the nonwoven fabric B, when the superabsorbent polymer swells due to liquid absorption, the non-fused intersection or the weakly fused intersection between the heterogeneous fibers is opened, the inter-fiber distance changes, and the size of the mesh in the network structure increases. Be extended. As a result, swelling inhibition of the superabsorbent polymer is effectively prevented.
【００２７】本発明において用いられる高吸収性ポリマ
ーとしては、例えば、ポリアクリル酸ナトリウム、（ア
クリル酸−ビニルアルコール）共重合体、ポリアクリル
酸ナトリウム架橋体、（でんぷん−アクリル酸）グラフ
ト共重合体、（イソブチレン−無水マレイン酸）共重合
体及びそのケン化物、ポリアスパラギン酸等、従来から
知られているものを用いることができる。The superabsorbent polymer used in the present invention includes, for example, sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, crosslinked sodium polyacrylate, (starch-acrylic acid) graft copolymer , (Isobutylene-maleic anhydride) copolymer and its saponified product, polyaspartic acid and the like can be used.
【００２８】高吸収性ポリマーは、その平均粒径が２０
０〜７００μｍであることが、不織布の構成繊維との絡
みが良好になる点から好ましい。また高吸収性ポリマー
は、その膨潤率（生理食塩水で飽和膨潤後の粒径／元の
粒径）が２〜５倍となるものであることが、不織布によ
る膨潤阻害を受けず、効率良く液を吸収できる点から好
ましい。The superabsorbent polymer has an average particle size of 20
It is preferably from 0 to 700 μm from the viewpoint that entanglement with the constituent fibers of the nonwoven fabric becomes good. In addition, the superabsorbent polymer has a swelling ratio (particle size after saturated swelling with physiological saline / original particle size) of 2 to 5 times, so that swelling is not hindered by the nonwoven fabric, and the superabsorbent polymer is efficiently treated. It is preferable because it can absorb liquid.
【００２９】特に、ＤＷ法による吸収速度が、好ましく
は８ｇ／３０秒／０．３ｇ以上の高吸収性ポリマーＡ
と、好ましくは５ｇ／３０秒／０．３ｇ以下の高吸収性
ポリマーＢとを、高吸収性ポリマーＡ／高吸収性ポリマ
ーＢ＝９０／１０〜１０／９０（重量比）で併用するこ
とが、高い吸収速度と高い飽和吸収量を維持しつつ、フ
ラッフパルプ等の繊維基材の使用量を通常のおむつに比
べ大幅に削減できるので望ましい。Particularly, the superabsorbent polymer A having an absorption rate by the DW method of preferably 8 g / 30 sec / 0.3 g or more.
And preferably 5 g / 30 seconds / 0.3 g or less of superabsorbent polymer B in a ratio of superabsorbent polymer A / superabsorbent polymer B = 90/10 to 10/90 (weight ratio). It is desirable because the amount of the fibrous base material such as fluff pulp can be greatly reduced as compared with a normal diaper while maintaining a high absorption rate and a high saturated absorption amount.
【００３０】ＤＷ法による吸収速度（ｇ／３０秒／０．
３ｇ）は、ＤＷ法を実施する装置として一般的に知られ
ている装置(Demand Wettability Tester）を用い、生理
食塩水の液面を等水位にセットしたポリマー散布台（７
０ｍｍφ、No.2濾紙をガラスフィルターNo.1に置いた
台）上に、測定対象の高吸収性ポリマーを０．３ｇ散布
し、高吸収性ポリマーを散布した時点の吸水量を０と
し、３０秒後の吸水量（この吸収量は、生理食塩水の水
位の低下量を示すビュレットの目盛りで測定される）を
測定し、測定された値を吸収速度の値とする。前記装置
は、例えば特許第２９３８７７５号明細書の図１に記載
されている。The absorption rate by the DW method (g / 30 seconds / 0.
3g), using a device (Demand Wettability Tester) generally known as a device for performing the DW method, using a polymer spray table (7) in which the liquid level of physiological saline was set at the same water level.
0 mmφ, a table on which No. 2 filter paper was placed on a glass filter No. 1) was sprayed with 0.3 g of the superabsorbent polymer to be measured, and the water absorption at the time of spraying the superabsorbent polymer was set to 0, and 30 The amount of water absorption after a second (the amount of absorption is measured on a burette scale indicating the amount of decrease in the level of physiological saline) is measured, and the measured value is defined as the value of the absorption rate. The device is described, for example, in FIG. 1 of Japanese Patent No. 2,938,775.
【００３１】吸収体４における高吸収性ポリマーの散布
坪量は、５０〜４００ｇ／ｍ2、特に１００〜３００ｇ
／ｍ2であることが、フラップパルプを用いることなく
高い吸収性能を維持でき、おむつ１の、ひいては包装体
のコンパクト化を図ることができるので好ましい。The spray basis weight of the superabsorbent polymer in the absorber 4 is 50 to 400 g / m 2 , especially 100 to 300 g.
/ M 2 is preferable because high absorption performance can be maintained without using flap pulp and the diaper 1 and thus the package can be made compact.
【００３２】吸収体４は、高吸収性ポリマーを担持した
不織布の上下面をそのまま通常の吸収紙で等で被覆して
形成してもよい。また、フラッフパルプ、コットン、レ
ーヨン等の繊維集合体を該不織布に積層して形成しても
よい。本実施形態においては、不織布をそのまま吸収紙
で被覆したものを用いている。The absorber 4 may be formed by directly covering the upper and lower surfaces of a nonwoven fabric carrying a highly absorbent polymer with ordinary absorbent paper or the like. Further, a fiber aggregate such as fluff pulp, cotton, rayon or the like may be laminated on the nonwoven fabric. In the present embodiment, a nonwoven fabric that is directly covered with absorbent paper is used.
【００３３】吸収体４は、前述の通り、カード法やエア
レイド法などのウエブ形成手段によってウエブを形成
し、次いでエアースルー法によって該ウエブの構成繊維
の交点を熱風融着させて不織布を形成し、然る後、該不
織布上に高吸収性ポリマーの粒子を散布して、該不織布
の構成繊維間に該粒子を保持固定させることで得られ
る。高吸収性ポリマーの粒子の散布に際しては、不織布
を該粒子の散布面と反対側の面から吸引することが、不
織布の内部に該粒子が均一に行きわたることから好まし
い。As described above, the absorber 4 forms a web by a web forming means such as a card method or an air laid method, and then forms a nonwoven fabric by fusing the intersections of the constituent fibers of the web by hot air by an air-through method. Thereafter, the particles are obtained by spraying particles of the superabsorbent polymer on the nonwoven fabric and holding and fixing the particles between constituent fibers of the nonwoven fabric. When the particles of the superabsorbent polymer are sprayed, it is preferable to suck the nonwoven fabric from the surface opposite to the surface on which the particles are sprayed, since the particles uniformly spread inside the nonwoven fabric.
【００３４】本実施形態の使い捨ておむつは、上述の如
く構成された吸収体を有するので、吸収体を薄くして
も、高吸収性ポリマーの吸水性能が十分に発揮される。
従って、吸収体を軽量・コンパクトなものとしても十分
な吸収性能が発揮される。このため、同じ枚数のおむつ
を収納した従来の包装体に比して軽量化及びコンパクト
化が可能となる。更には、高吸収性ポリマーは不織布に
しっかりと固定されるので、吸収体のよれや壊れがな
く、これらに起因する漏れが効果的に防止される。Since the disposable diaper of the present embodiment has the absorber configured as described above, even if the absorber is made thin, the water-absorbing performance of the superabsorbent polymer is sufficiently exhibited.
Therefore, sufficient absorption performance is exhibited even if the absorber is lightweight and compact. For this reason, weight reduction and compactness are attained compared with the conventional package which stored the same number of diapers. Furthermore, since the superabsorbent polymer is firmly fixed to the nonwoven fabric, there is no warping or breakage of the absorbent body, and leakage caused by these is effectively prevented.
【００３５】本発明は前記実施形態に制限されない。例
えば、前記実施形態においては、吸収体４は、高吸収性
ポリマー及び不織布から構成されていたが、本発明の効
果を損なわない範囲において、少量のフラップパルプ等
を配合してもよい。The present invention is not limited to the above embodiment. For example, in the above embodiment, the absorber 4 is composed of the superabsorbent polymer and the nonwoven fabric, but a small amount of flap pulp or the like may be blended as long as the effects of the present invention are not impaired.
【００３６】また前記実施形態は展開型の使い捨ておむ
つに係るものであるが、本発明はその他の吸収性物品、
例えばパンツ型の使い捨ておむつ、失禁パッド、生理用
ナプキン等にも適用可能である。Although the above embodiment relates to a deployable disposable diaper, the present invention relates to other absorbent articles,
For example, the present invention can be applied to a pants-type disposable diaper, an incontinence pad, a sanitary napkin, and the like.
【００３７】〔実施例１〕ＤＷ法による吸収速度が１
１．８ｇ／３０秒／０．３ｇの高吸収性ポリマーＡ（住
友精化製、商品名「１０ＳＨ−Ｐ」）と、ＤＷ法による
吸収速度が３．６ｇ／３０秒／０．３ｇの高吸収性ポリ
マーＢ（日本触媒製、商品名「ＣＡ−Ｗ４」）とを重量
比（Ａ／Ｂ）＝５０／５０で混合し、高吸収性ポリマー
混合物を得た。[Example 1] The absorption rate by the DW method was 1
1.8 g / 30 seconds / 0.3 g of highly absorbent polymer A (manufactured by Sumitomo Seika Co., Ltd., trade name “10SH-P”), and an absorption rate by the DW method of 3.6 g / 30 seconds / 0.3 g. Absorbent polymer B (trade name “CA-W4” manufactured by Nippon Shokubai) was mixed at a weight ratio (A / B) = 50/50 to obtain a highly absorbent polymer mixture.
【００３８】これとは別に、芯材がＰＥＴで、鞘材がＰ
Ｅである芯鞘構造の複合繊維（繊度６ｄ、繊維長５１ｍ
ｍ）と、レーヨン繊維（繊度５ｄ、繊維長５１ｍｍ）と
を、重量比７０／３０で混綿し、カード法でウエブを形
成した。このウエブをエアスルー法による熱風処理に付
し、坪量４０ｇ／ｍ2、繊維密度０．０２ｇ／ｍ3のエア
スルー不織布（不織布Ａ）を形成した。Separately, the core material is PET and the sheath material is P
E-core-sheath composite fiber (fineness 6d, fiber length 51m)
m) and rayon fibers (fineness: 5d, fiber length: 51 mm) were mixed at a weight ratio of 70/30, and a web was formed by a card method. This web was subjected to a hot-air treatment by an air-through method to form an air-through nonwoven fabric (nonwoven fabric A) having a basis weight of 40 g / m 2 and a fiber density of 0.02 g / m 3 .
【００３９】得られた不織布上に、前記高吸収性ポリマ
ー混合物を２００ｇ／ｍ2の坪量となるように散布し、
該不織布の構成繊維間に該高吸収性ポリマー混合物を担
持させた。次いで、不織布の上下面を坪量１５ｇ／ｍ2
の吸収紙で被覆して吸収体を得た。The above superabsorbent polymer mixture was sprayed on the nonwoven fabric so as to have a basis weight of 200 g / m 2 ,
The superabsorbent polymer mixture was supported between constituent fibers of the nonwoven fabric. Next, the upper and lower surfaces of the nonwoven fabric are weighed 15 g / m 2.
To obtain an absorber.
【００４０】次に、この吸収体の一面に、表面シートと
して、芯材がＰＰで鞘材がＰＥである芯鞘構造の複合繊
維からなる親水化処理された不織布を配した。また他面
に、裏面シートとして、ＰＥ製フィルムを配した。更
に、公知のファスニングテープ、ウエスト弾性部材、レ
ッグ弾性部材等を配して、図１に示す形態のベビー用Ｍ
サイズの使い捨ておむつを得た。Next, on one surface of the absorber, a hydrophilic nonwoven fabric composed of a core-sheath composite fiber having a core material of PP and a sheath material of PE was disposed as a surface sheet. On the other side, a PE film was provided as a back sheet. Further, a known fastening tape, a waist elastic member, a leg elastic member, and the like are arranged so that the baby M shown in FIG.
I got a size disposable diaper.
【００４１】〔実施例２〕芯材がＰＥＴで、鞘材がＰＥ
である芯鞘構造の複合繊維Ａ（繊度６ｄ、繊維長５１ｍ
ｍ）と、芯材がＰＰで、鞘材が低融点ＰＰである芯鞘構
造の複合繊維Ｂ（繊度８ｄ、繊維長５１ｍｍ）とを、重
量比５０／５０で混綿し、カード法でウエブを形成し
た。複合繊維Ａにおける鞘材の融点は１３２℃であり、
複合繊維Ｂにおける鞘材の融点は１３５℃であった。こ
の後は実施例１と同様にしてエアスルー不織布（不織布
Ｂ）を形成した。熱風の温度は１３８℃であった。この
不織布を吸収体の構成材料として用いた以外は実施例１
と同様にして使い捨ておむつを得た。尚、前記不織布に
おいては、同種繊維同士の交点は強固に融着していた
が、異種繊維間の交点は、融着していないか又は極めて
弱く融着していた。Example 2 The core material is PET and the sheath material is PE
Composite fiber A having a core-sheath structure (fineness 6d, fiber length 51m)
m) and a core-sheath composite fiber B (fineness 8d, fiber length 51 mm) in which the core material is PP and the sheath material is a low melting point PP at a weight ratio of 50/50, and the web is carded. Formed. The melting point of the sheath material in the composite fiber A is 132 ° C.,
The melting point of the sheath material in the composite fiber B was 135 ° C. Thereafter, an air-through nonwoven fabric (nonwoven fabric B) was formed in the same manner as in Example 1. The temperature of the hot air was 138 ° C. Example 1 except that this nonwoven fabric was used as a constituent material of the absorber.
In the same manner as above, a disposable diaper was obtained. In the nonwoven fabric, the intersections between the same kind of fibers were strongly fused, but the intersections between different kinds of fibers were not fused or extremely weakly fused.
【００４２】〔比較例１〕ＤＷ法による吸収速度が３．
６ｇ／３０秒／０．３ｇの高吸収性ポリマー（日本触媒
製、商品名「ＣＡ−Ｗ４」）とフラッフパルプとを、重
量比（ポリマー／パルプ）＝４０／６０で混合し、混合
物をシート状に積繊した。次いでその上下面を坪量１５
ｇ／ｍ2のティッシュペーパーで被覆して吸収体を得
た。高吸収性ポリマー及びフラッフパルプの坪量は、そ
れぞれ２００ｇ／ｍ2、３００ｇ／ｍ2であった。この吸
収体を用いた以外は実施例１と同様にして使い捨ておむ
つを得た。[Comparative Example 1] The absorption rate by the DW method was 3.
A 6 g / 30 sec / 0.3 g superabsorbent polymer (manufactured by Nippon Shokubai Co., Ltd., trade name "CA-W4") and fluff pulp are mixed at a weight ratio (polymer / pulp) = 40/60, and the mixture is sheeted. It was piled in a shape. Next, the upper and lower surfaces are weighed 15
The absorbent was obtained by coating with a tissue paper of g / m 2 . The basis weight of superabsorbent polymer and fluff pulp, were respectively 200g / m 2, 300g / m 2. A disposable diaper was obtained in the same manner as in Example 1 except that this absorbent was used.
【００４３】〔比較例２〕芯材がＰＥＴで、鞘材がＰＥ
である芯鞘構造の複合繊維（繊度６ｄ、繊維長５１ｍ
ｍ）からなる坪量４０ｇ／ｍ2エアスルー不織布を形成
した。この不織布を吸収体の構成材料として用いた以外
は実施例１と同様にして使い捨ておむつを得た。Comparative Example 2 The core material was PET and the sheath material was PE
Composite fiber with a core-sheath structure (fineness 6d, fiber length 51m)
m) to form an air-through nonwoven fabric having a basis weight of 40 g / m 2 . A disposable diaper was obtained in the same manner as in Example 1 except that this nonwoven fabric was used as a constituent material of the absorber.
【００４４】実施例及び比較例の各使い捨ておむつの重
量、厚み、飽和吸収量及び最大吸収量をそれぞれ測定
し、その結果を表１に示した。おむつの厚み、飽和吸収
量及び最大吸収量の測定方法は以下の通りである。The weight, thickness, saturated absorption amount and maximum absorption amount of each disposable diaper of the example and the comparative example were measured, and the results are shown in Table 1. The method for measuring the thickness, the saturated absorption amount and the maximum absorption amount of the diaper is as follows.
【００４５】〔おむつの厚みの測定法〕おむつを平面状
に拡げ、その状態において、おむつ股下部を１００ｍｍ
×１００ｍｍの寸法で切り出して試験片とした。得られ
た試験片を水平な台上に載置し、その上にアクリル板
（長さ１００ｍｍ、幅１００ｍｍ、厚み５ｍｍ）及び重
りをこの順で載置し、試験片に１８０ｇｆ／ｃｍ2の荷
重を加えた。重りとしては、アクリル板と合わせて、試
験片に前記荷重が加わるような重さ及び形状のものを用
いた。この状態で２４時間放置後、そのままの状態で試
験片の四隅の厚みを測定し、それらの値の平均値をおむ
つの厚みとした。[Measurement method of diaper thickness] The diaper is spread in a plane, and in that state, the crotch part of the diaper is set to 100 mm.
A test piece was cut out at a size of × 100 mm. The obtained test piece is placed on a horizontal table, on which an acrylic plate (length 100 mm, width 100 mm, thickness 5 mm) and a weight are placed in this order, and a load of 180 gf / cm 2 is placed on the test piece. Was added. As the weight, a weight and shape having such a load as to be applied to the test piece were used together with the acrylic plate. After standing for 24 hours in this state, the thickness of the four corners of the test piece was measured as it was, and the average of those values was taken as the diaper thickness.
【００４６】〔おむつの飽和吸収量の測定方法〕おむつ
を平面状に拡げ、その状態において、おむつ股下部を１
００ｍｍ×１００ｍｍの寸法で切り出して試験片とし
た。得られた試験片を１５０ｍｍ×１５０ｍｍのナイロ
ン製のメッシュ（２５０メッシュ）袋に入れ、該メッシ
ュ袋ごと生理食塩水に浸漬した。１分後に生理食塩水か
ら引き上げて５分間水切りし、水切り後の重量（ｇ）、
浸漬前の重量（ｇ）及び試験片の面積（ｃｍ2）から、
試験片１００ｃｍ2当たりの生理食塩水の吸収量（ｇ）
を算出し、この値を飽和吸収量（ｇ／１００ｃｍ2）と
した。[Method of Measuring Saturated Absorbed Amount of Diaper] The diaper is spread in a plane, and in this state, the diaper crotch is raised by one.
A test piece was cut out at a size of 00 mm x 100 mm. The obtained test piece was placed in a 150 mm × 150 mm nylon mesh (250 mesh) bag, and the mesh bag was immersed in a physiological saline solution. After 1 minute, pull up from the physiological saline and drain for 5 minutes. Weight (g) after draining,
From the weight before immersion (g) and the area of the test piece (cm 2 ),
Absorbed amount of physiological saline per 100 cm 2 of test piece (g)
Was calculated, and this value was defined as the saturated absorption amount (g / 100 cm 2 ).
【００４７】〔おむつの最大吸収量の測定方法〕おむつ
を、その腹側部の端部から２２５ｍｍの位置で切断し、
切断された該腹側部を試験片とした。角度４５°の斜面
台上に、試験片を、その腹側部の端部が下側になるよう
に且つ表面シートが上側となるように載置した。試験片
における腹側部の端部から１６５ｍｍの位置に、生理食
塩水を、５ｍｌ／秒の速度で４０ｍｌ注入した。注入完
了から５分後に同様の操作を行った。この操作を繰り返
し、おむつに保持できた生理食塩水の最大量を、おむつ
の最大吸収量とした。[Measurement method of maximum absorption amount of diaper] The diaper is cut at a position of 225 mm from the end of the abdominal part,
The cut ventral part was used as a test piece. The test piece was mounted on a 45 ° angled slope table such that the abdominal end was on the lower side and the topsheet was on the upper side. 40 ml of physiological saline was injected at a rate of 5 ml / sec into the test piece at a position 165 mm from the end of the ventral part. The same operation was performed 5 minutes after the completion of the injection. This operation was repeated, and the maximum amount of physiological saline that could be held in the diaper was defined as the maximum absorption amount of the diaper.
【００４８】[0048]
【表１】 [Table 1]
【００４９】表１に示す結果から明らかなように、実施
例のおむつ（本発明品）は、吸収体にフラップパルプを
用いていないので、その重量及び厚みが比較例のおむつ
に比して大幅に小さくなっている。それにも拘わらず、
実施例のおむつは、比較例のおむつと同程度又はそれ以
上の吸収性能を有していることが判る。比較例１のおむ
つは吸収性能は高いが、重くて厚いものであり、包装体
としたときの持ち運びが不便である。比較例２のおむつ
は軽く薄いものであるものの、高吸収性ポリマーの膨潤
阻害が起こり吸収性能が十分とならない。As is clear from the results shown in Table 1, the weight and thickness of the diaper of the example (the product of the present invention) are not so large as those of the comparative example because no flap pulp is used for the absorbent. Has become smaller. Nevertheless,
It can be seen that the diaper of the example has the same or higher absorption performance as the diaper of the comparative example. Although the diaper of Comparative Example 1 has high absorption performance, it is heavy and thick, and it is inconvenient to carry it as a package. Although the diaper of Comparative Example 2 is light and thin, swelling inhibition of the superabsorbent polymer occurs and the absorption performance is not sufficient.
【００５０】[0050]
【発明の効果】本発明の吸収性物品は、軽量・コンパク
トで、十分な吸収性能を有し、更には吸収体のよれや壊
れがなく、液漏れが防止されたものとなる。As described above, the absorbent article of the present invention is lightweight and compact, has a sufficient absorbing performance, and has no kinking or breakage of the absorber and prevents liquid leakage.
【図１】図１は、本発明の吸収性物品の一実施形態を示
す一部破断斜視図である。FIG. 1 is a partially cutaway perspective view showing one embodiment of an absorbent article of the present invention.
【図２】熱接着力の測定方法を示す模式図である。FIG. 2 is a schematic view showing a method for measuring a thermal adhesive force.
【図３】図３は、図１に示す吸収体の一部拡大図であ
り、図３(a) は、高吸収性ポリマーが吸液する前の状態
を示す概略図であり、図３(b) は、高吸収性ポリマーが
吸液して膨潤した後の状態を示す概略図である。FIG. 3 is a partially enlarged view of the absorber shown in FIG. 1, and FIG. 3 (a) is a schematic view showing a state before the super-absorbent polymer absorbs liquid, and FIG. b) is a schematic diagram showing a state after the superabsorbent polymer has absorbed and swelled.
１ 吸収性物品（使い捨ておむつ） １１ ファスニングテープ ２ 表面シート ３ 裏面シート ４ 吸収体 ４１ 高吸収性ポリマー ４２ 不織布 ４２ａ 熱融着性繊維 ４２ｂ 非熱融着性繊維 ４３ａ 融着交点 ４３ｂ 非融着交点 ５ ウエスト部 ５１ ウエスト弾性部材 ６ レッグギャザー ６１ レッグ弾性部材 Ａ 腹側部 Ｂ 背側部 Ｎ 網目構造 DESCRIPTION OF SYMBOLS 1 Absorbent article (disposable diaper) 11 Fastening tape 2 Top sheet 3 Back sheet 4 Absorber 41 Superabsorbent polymer 42 Nonwoven fabric 42a Heat fusible fiber 42b Non heat fusible fiber 43a Fusion intersection 43b Non fusion intersection 5 Waist part 51 Waist elastic member 6 Leg gather 61 Leg elastic member A Abdominal part B Back part N Mesh structure
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ３２Ｂ 27/00 Ａ４１Ｂ 13/02 Ｂ Ｄ０４Ｈ 1/54 (72)発明者 金田 学 栃木県芳賀郡市貝町赤羽2606 花王株式会 社研究所内 Ｆターム(参考） 3B029 BA04 BA15 BA18 4C098 AA09 CC03 CC07 CC12 CE07 DD03 DD04 DD05 DD10 DD25 DD26 DD27 DD28 4F100 AJ06 AK01C AK04 AK07 AK25 AK42 AR00A AR00B BA03 BA05 DG10 DG15C DG18C DG20 EC03C GB72 JD05A JD05B JD14C JK08C JL03 JL04 JL12C YY00C 4L047 AA08 AA14 AA21 AA27 BA09 BB01 BB06 BB09 CA07 CB07 CC04 Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat II (Reference) B32B 27/00 A41B 13/02 B D04H 1/54 (72) Inventor Manabu Kaneda 2606 Akabane, Kaikaicho, Haga-gun, Tochigi Kao Stock F-term in corporate research laboratory (reference) JL12C YY00C 4L047 AA08 AA14 AA21 AA27 BA09 BB01 BB06 BB09 CA07 CB07 CC04
Claims (5)
面シート及び液保持性の吸収体を備えた吸収性物品にお
いて、 前記吸収体は、高吸収性ポリマーが不織布の構成繊維間
に保持された構造を有しており、該不織布は、熱融着性
繊維及び該熱融着性繊維同士の融着温度では該熱融着性
繊維と融着しない非熱融着性繊維を含み、該熱融着性繊
維同士が熱風融着されている吸収性物品。1. An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retentive absorber, wherein the absorbent has a high-absorbent polymer between constituent fibers of a nonwoven fabric. Having a retained structure, the non-woven fabric includes heat fusible fibers and non-heat fusible fibers that do not fuse with the heat fusible fibers at a fusion temperature between the heat fusible fibers. An absorbent article in which the heat-fusible fibers are fused by hot air.
同士、及び前記非熱融着性繊維と前記熱融着性繊維とが
融着しておらず、前記非熱融着性繊維が、前記高吸収性
ポリマーが吸液によって膨潤するのに十分な繊維自由度
を有している請求項１記載の吸収性物品。2. The non-heat fusible fibers in the nonwoven fabric, and the non-heat fusible fibers and the heat fusible fibers are not fused, and the non-heat fusible fibers are: 2. The absorbent article according to claim 1, wherein said superabsorbent polymer has a sufficient degree of fiber freedom to swell by liquid absorption.
との配合割合が、重量比で９０／１０〜４０／６０であ
る請求項１又は２記載の吸収性物品。3. The absorbent article according to claim 1, wherein the blending ratio of the heat-fusible fibers and the non-heat-fusible fibers is 90/10 to 40/60 by weight.
面シート及び液保持性の吸収体を備えた吸収性物品にお
いて、 前記吸収体は、高吸収性ポリマーが不織布の構成繊維間
に保持された構造を有しており、該不織布は、第１熱融
着性繊維及び該第１熱融着性繊維とは異なる第２熱融着
性繊維を含み、これらの繊維が熱風融着されており、 前記第１熱融着性繊維及び前記第２熱融着性繊維は、同
種繊維同士の熱接着力よりも異種繊維間の熱接着力が低
いものであるか、又は異種繊維間では熱接着しないもの
である吸収性物品。4. An absorbent article provided with a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retentive absorber, wherein the high-absorbent polymer is formed between constituent fibers of a nonwoven fabric. A non-woven fabric comprising a first heat fusible fiber and a second heat fusible fiber different from the first heat fusible fiber, wherein the fibers are hot air fusible. Wherein the first heat-fusible fiber and the second heat-fusible fiber have a lower thermal adhesive force between different kinds of fibers than a same kind of fibers, or Absorbent articles that are not heat bonded.
性繊維との配合割合が、重量比で９０／１０〜１０／９
０である請求項４記載の吸収性物品。5. The compounding ratio of the first heat fusible fiber and the second heat fusible fiber is 90/10 to 10/9 in weight ratio.
The absorbent article according to claim 4, which is 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000359591A JP2002159533A (en) | 2000-11-27 | 2000-11-27 | Absorptive article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000359591A JP2002159533A (en) | 2000-11-27 | 2000-11-27 | Absorptive article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002159533A true JP2002159533A (en) | 2002-06-04 |
Family
ID=18831335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000359591A Pending JP2002159533A (en) | 2000-11-27 | 2000-11-27 | Absorptive article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002159533A (en) |
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| WO2011158838A1 (en) * | 2010-06-15 | 2011-12-22 | 旭化成ケミカルズ株式会社 | Absorbent sheet and method for producing same |
| WO2014001487A1 (en) * | 2012-06-29 | 2014-01-03 | Concepts For Success (C4S) E.K. | Meltfusion bonded absorbent structure comprising fibres and superabsorbent particles and method for manufacturing such structure |
| JP2014500736A (en) * | 2010-10-20 | 2014-01-16 | フィンカ ベーフェーベーアー | Environmentally friendly absorbent structure |
| CN104602658A (en) * | 2012-06-29 | 2015-05-06 | 成功概念公司 | Meltfusion bonded absorbent structure comprising fibres and superabsorbent particles and method for manufacturing same |
| US9561139B2 (en) | 2006-02-22 | 2017-02-07 | Dsg Technology Holdings Ltd. | Method of making an absorbent composite and absorbent articles employing the same |
| US9566198B2 (en) | 2013-03-15 | 2017-02-14 | Dsg Technology Holdings Ltd. | Method of making an absorbent composite and absorbent articles employing the same |
| US9789014B2 (en) | 2013-03-15 | 2017-10-17 | Dsg Technology Holdings Ltd. | Method of making an absorbent composite and absorbent articles employing the same |
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