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JP3877702B2 - Absorbent products - Google Patents

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Publication number
JP3877702B2
JP3877702B2 JP2003118513A JP2003118513A JP3877702B2 JP 3877702 B2 JP3877702 B2 JP 3877702B2 JP 2003118513 A JP2003118513 A JP 2003118513A JP 2003118513 A JP2003118513 A JP 2003118513A JP 3877702 B2 JP3877702 B2 JP 3877702B2
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JP
Japan
Prior art keywords
groove
high pressure
line
pressing
pressure
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Expired - Fee Related
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JP2003118513A
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Japanese (ja)
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JP2004321393A (en
Inventor
克志 筒井
更夫 平田
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Zuiko Corp
Pigeon Corp
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Zuiko Corp
Pigeon Corp
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  • Orthopedics, Nursing, And Contraception (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、下着の内側に配置して、尿や経血等の体液を吸収保持するための失禁用パッド、幼児用パッド、生理用ナプキン、おりものシート、母乳パッド等の吸収性製品に関するものである。
【0002】
【従来の技術】
従来、生理用ナプキン等の吸収性製品は、一般的には、一方向に長い長方形もしくは長円形に形成したパッド体であり、下着の股部に対応した位置において、前後に長さ方向を合わせて装着されることで、使用者が排出した経血等の体液を受容するようになっている。
このような吸収性製品は、使用者が装着したときに外面となる箇所には、液体不透過性のシート材が適用され、その内側には経血等の液体を吸収するための吸収体が配置され、さらにその内側で使用者の肌と接触する箇所には、液体を透過するシート材が配置されている。
これにより、排泄物である尿等は、液体を透過するシート材を透過して、吸収体に吸収され、さらに、液体不透過性のシート材により外部にしみ出たりすることが防止される。
【0003】
図15は、従来の生理用ナプキンの一例を示す概略斜視図である(特許文献1参照)。
図において、生理用ナプキン1は、一方向に長い形状であり、人体表面に接触する液体透過性の表面シート2と、図1では裏面となる側に配置された液体不透過性のバックシートと、このバックシートと上記表面シート2の間に設けた図示しない吸収体を含んでいる。
【0004】
生理用ナプキン1の表面シート2側には、この表面シート2を吸収体とともにバックシート側に圧搾して形成した環状の圧搾条溝5が設けられている。
図16はこの圧搾条溝5を拡大して示すもので、圧搾条溝5内には、低圧搾部6が、その両側縁に所定間隔で形成されている。
これにより圧搾条溝5は、比較的溝が深い構成で、上記低圧搾部6は圧搾の度合いが低く、溝深さが比較的浅い構成となっている。
【0005】
この生理用ナプキン1では、装着者の経血等の体液は、人体の横方向に向かって流れて、この圧搾条溝5に入り、長さ方向に導くことで、横漏れを防止しようとするものである。そして、圧搾条溝5の両側縁には、溝を横切らない低圧搾部6が、それぞれ各側縁にそって、所定間隔をおいて設けられている。このため、圧搾条溝5を横切るように低圧搾部を設ける場合に比べて、この低圧搾部が圧搾条溝の両側を繋ぐ結果となり、横漏れしてしまうことがないようにされている。
【0006】
【特許文献1】
特開2003−38555
【0007】
【発明が解決しようとする課題】
ところで、このような生理用ナプキン1では、図16に示すように圧搾条溝5においては、その両側縁に沿って配置される低圧搾部6どうしの間隔が大きく、低圧搾部6が存在しない領域では、内側から外側に向かって、矢印Aに示すように圧搾条溝5を横切る経血等の体液を阻止するものがない。
このため、圧搾条溝5の作用によって、この圧搾条溝5の長さ方向に経血等の体液を導く作用はあるものの、圧搾条溝5を横切る方向に経血等の体液が進むことを阻止する考慮がほとんどされていないので、依然として、横漏れを有効に防止することができない。
【0008】
そこで、本発明は、体液の横方向の漏れを確実に阻止して、縦方向に適度に拡散するように導くことができるようにした吸収性製品を提供することを目的としている。
【0009】
【課題を解決するための手段】
上記目的は、請求項1の発明によれば、一方向に長い形状を有しており、液体の透過を防止するバックシートと、身体に接触する面側に配置される液体透過性の表面材と、前記バックシートと前記表面材との間に配置されて前記表面材を透過した液体を吸収して保持する吸収体とを備えていて、前記吸収体の存在する領域の前記長さ方向の少なくとも中央部の両側縁付近において、長さ方向に延びる少なくとも一対の条溝を有しており、前記条溝の両側縁に沿って、前記表面材及び吸収体を前記バックシート側に圧搾して形成した前記長さ方向に長い多数の高圧搾部が、各側縁に沿って、所定の間隔をおいて連続するように形成されてなる内側高圧搾線と外側高圧搾線とを設け、前記内側高圧搾線と外側高圧搾線との間には、前記長さ方向に連続する低圧搾部が設けられていて、さらに、前記内側高圧搾線と外側高圧搾線とにそれぞれ含まれる前記各高圧搾部が、前記条溝の長さ方向の位置を互いにずらして形成されており、さらに、前記内側高圧搾線の高圧搾部と外側高圧搾線の高圧搾部との長さ方向の各端部について、一方の端部が他方の端部の端縁を超えるようにされることで、該端部どうしが、前記条溝の幅方向に関して、重なる部分を備えている吸収性製品により、達成される。
【0010】
請求項1の構成によれば、本発明の吸収性製品は、複数のシート状材料を積層固着して一方向に長い基本形状を有している。前記バックシートは液体の透過を防止するものである。前記表面材は身体に接触する面側に配置される液体透過性のものである。前記吸収体はバックシートと表面材の間に配置されて表面材を透過した液体を吸収して保持するものである。
【0011】
ここで、図1は、本発明の要部の構成を拡大して示す説明図である。なお、図1に表れた全ての構成が、請求項1の発明の構成要素とされているわけではなく、また、請求項1の発明の全ての構成が図1に表されているものではない。
前記吸収体の存在する領域において、図1に拡大して示すように、条溝40が設けられている。図のL方向が前記長さ方向であり、吸収性製品の長さ方向に一致し、「縦方向」と表現した場合も同じである。矢印T方向は吸収性製品の幅方向である。
【0012】
図1において、40は条溝であり、チャネルエンボスである。条溝40の両側縁には、高圧搾部41・・・が複数,もしくは多数設けられていて、図示されているように、条溝40の外側の側縁部にも、内側の側縁部にも、高圧搾部41・・・が設けられている。外側の側縁部において、複数の高圧搾部41d,41e,41fと並ぶ線が前記外側高圧搾線である。内側の側縁部において、複数の高圧搾部41a,41b,41cと並ぶ線が前記内側高圧搾線である。各側縁部における高圧搾部どうしの間は、所定の間隔L2が設けられている。
条溝40の各高圧搾部41が設けられていない領域が、低圧搾部42である。高圧搾部41は最も溝が深い部分であり、低圧搾部42は高圧搾部41よりも浅い溝部分である。高圧搾部41は、表面材や吸収体が強く圧搾されており、材料どうしの隙間が小さく、体液等の液体を毛細管現象で急速に吸収する機能を発揮する。低圧搾部42は、高圧搾部よりも圧搾の程度が低いので、材料どうしの隙間が高圧搾部よりも大きく、一定の吸収スピードを有しつつ、吸収した液体の保持能力が高い。
【0013】
本発明では、「前記内側高圧搾線と外側高圧搾線とにそれぞれ含まれる前記各高圧搾部が、前記条溝の長さ方向の位置を互いにずらして形成」されている。このことは、図1に示されているように、内側高圧搾線52に含まれる高圧搾部41a,41b,41cの矢印L方向の位置が、外側高圧搾線51に含まれる高圧搾部41d,41e,41fの矢印L方向の位置と相互に異なるように配置されていることを意味する。
【0014】
このため、図1に示されているように、使用者により排出された尿等の液体が、内側から条溝40に向かうと、内側高圧搾線52に属する高圧搾部41bに位置する液体S1は、高圧搾部41bに急速に吸収され、この高圧搾部41bはL方向に長く形成されているために、S3に示すようにL方向、すなわち長さ方向に導かれる。そして、高圧搾部41bと高圧搾部41aの間の低圧搾部41aに導かれ、吸収される。吸収しきれない液体は高圧搾部41aに吸収拡散される。かくして、横方向(T方向)に向かう液体は、先ず内側高圧搾線52により、L方向に拡散されつつ、順次吸収保持される。
【0015】
次に、高圧搾部41bと41cの間の低圧搾部42bに吸収された液体は、一部がS5としてL方向に向かい、残りはS2として横方向に向かうことで、外側高圧搾線51の高圧搾部41eに吸収される。この外側高圧搾線51では、内側高圧搾線52と同様の作用で、液体をS4に示すようにL方向に拡散しつつ、順次吸収保持する。
このように、本発明では、横方向に向かう尿等の液体をL方向に拡散吸収する2つの高圧搾線(外側高圧搾線51および内側高圧搾線52)を備えることで、液体を確実にL方向に拡散させることができ、しかも、各高圧搾部の間で保持することができる。これにより、横方向への液体の漏れを確実に防止できるとともに、2つの高圧搾線において、それぞれの高圧搾部がL方向の位置を変えて設けられているから、横方向(T方向)に向かう液体は、S1もS2も必ず、いずれかの高圧搾線の高圧搾部に吸収されて、L方向に導かれるので、液体の横漏れ防止が確実に行われる。つまり、比較例として示す図2(a)の条溝40−1のように、並列な2高圧搾線に属する高圧搾部41−1a,41−1b,41−1cと、41−1d,41−1e,41−1fとが、L方向の同じ位置に設けられている場合について見ると、液体S6はL方向に導かれるが、これらの間を通る液体S7について、L方向への拡散作用が弱く、横漏れのおそれが生じるのである。
【0016】
また、L方向への液体の拡散だけを目的として、第2の比較例である図2(b)の条溝40−2のように、条溝内を全て高圧搾部41−2とすると、L方向へ拡散させた液体の保持機能がなく、拡散だけされて、保持されない液体がいずれかの方向に漏れることになる。さらに、強く圧搾された領域の面積が大きくなり過ぎ、条溝40−2全体が過度に硬くなってしまうことで、装着した際に使用者の肌に接触する部分に不快な刺激を与え、装着感を大きく損なうことになる。
さらに、図1を参照して説明すると、内側高圧搾線52の高圧搾部41cについて見ると、外側高圧搾線51の高圧搾部41eの図において下端とD1の寸法で、高圧搾部41fの図において上端とD2の寸法で重なる位置に配置されている。
このため、横方向に移動する尿等の体液は、必ず内側高圧搾線52の高圧搾部もしくは外側高圧搾線51の高圧搾部に吸収されて長さ方向Lに向かって拡散されるので、より確実に横漏れを防止することができる。
【0018】
請求項2の発明は、請求項1の構成において、前記条溝の幅方向に関して、内側高圧搾線の高圧搾部と、前記低圧搾部と、外側高圧搾線の高圧搾部との各幅寸法がほぼ同一となるようにされていることを特徴とする。
請求項2の構成によれば、図1において、内側高圧搾線52の高圧搾部の幅寸法W1と、中間の低圧搾部42eの幅寸法W2と、外側高圧搾線51の高圧搾部との幅寸法W3を略1対1対1の同寸法としている。このため、低圧搾部42の領域がきわめて広く確保され、条溝40内に十分な液体を保持することができる。特に、内側高圧搾線52を超えて、横方向に移動する液体が中間の低圧搾部42eで吸収保持されることで、横漏れがより確実に防止される。また、低圧搾部42の領域がきわめて広いことで、比較的柔らかい領域が大きく、装着した際に、強く圧搾されて比較的硬くなった各高圧搾部51,52が使用者の肌に接触する部分に不快な刺激を与え、装着感を大きく損なうことが、より一層確実に防止される。さらに、中間の低圧搾部42eを有することにより、両側の高圧搾部の形態保持性が向上する。
【0019】
請求項3の発明は、請求項1または2の構成において、前記内側高圧搾線の多数の高圧搾部と、前記外側高圧搾線の多数の高圧搾部に関して、各高圧搾部は長さ方向に寸法が同一であり、前記所定の間隔の寸法が、この高圧搾部の長さ方向の寸法のほぼ20パーセントから49パーセントの範囲となるようにされていることを特徴とする。
請求項3の構成によれば、図1を参照して説明すると、高圧搾部41bの寸法L1(高圧搾部は全て同じ長さ寸法)が、前記所定間隔の寸法であるL2の2倍強から5倍の範囲とされている。
これにより、チャネルエンボス内に吸収された尿等の液体が、各高圧搾部によって長さ方向Lに向かうよう移動され、その移動した尿等をL2に当たる低圧搾部で一旦保持し、更に、低圧搾部で保持しきれなくなった尿等を、その低圧搾部の逆側に位置する高圧搾部で長さ方向L側に移動させるため、吸収性製品の長さ方向に沿って尿等を確実に拡散することができる。
【0020】
請求項4の発明は、請求項1ないし3のいずれかの構成において、前記条溝は、前記吸収体の存在する領域の前記長さ方向の少なくとも中央部において、間隔を狭くした一対の条溝であり、これら一対の条溝は、前記吸収体の前記長さ方向の両端部側で曲線状に内方に向かうことで、互いに一体とされて前記条溝の内部領域と、前記条溝の外部領域とを区分しており、さらに、少なくとも、前記条溝の曲線状に内方に向う箇所まで、前記一対の条溝に、前記高圧搾線と低圧搾線と低圧搾部とが形成されていることを特徴とする。
請求項4の構成によれば、製造工程おいて、前記曲線状の箇所には圧搾の際の力が大きく加わることから、前記高圧搾線と低圧搾線と低圧搾部とを、この領域以外の両側縁側に限定することで、圧搾の際の材料の破損が生じにくいとともに、両側縁領域に前記構造を設けることで、液体の横漏れを十分に防止することができる。なお、低圧搾線とは、図1において、低圧搾部42eがL方向に沿って連続している領域である。
また、条溝によって、吸収性製品を内部領域と外部領域に区分することで、尿等は内部領域から条溝へ移動されるように流れる方向が定まり、さらに条溝から漏れ出た尿等があっても、外部領域に導かれて、この外部領域の吸収体で尿等を保持することができる。
【0021】
請求項5の発明は、請求項1ないし4のいずれかの構成において、前記高圧搾部と前記低圧搾部とは複数の線形の境界を有しており、これらの線形境界が平行となるように形成されていることを特徴とする。
請求項5の構成によれば、図1のように、各高圧搾部41が矩形の外形を備えることで、低圧搾部との境界は互いに平行な2組の境界線となる。このため、境界線が交差する90度の角部が形成されることから、製造工程において、圧搾の力が効率的に加えられ、形態保持性が向上する。
【0022】
請求項6の発明は、請求項1ないし5のいずれかの構成において、前記表面材及び前記吸収体の少なくとも一部が、前記長手方向に沿った素材配向とされていることを特徴とする。
請求項6の構成によれば、尿等の液体は表面材等に使用される繊維等の素材の配置された方向に沿って導かれやすいので、前記表面材および前記吸収体の少なくとも一部が長手方向、すなわち、L方向への素材配向とされることで、表面材や吸収体の素材配向と液体の搬送方向とが一致され、条溝40に沿った液体の搬送がより効果的に行われる。
【0023】
【発明の実施の形態】
以下、本発明の好適な実施の形態を添付図面に基づいて詳細に説明する。
なお、以下に述べる実施の形態は、本発明の好適な具体例であるから、技術的に好ましい種々の限定が付されているが、本発明の範囲は、以下の説明において特に本発明を限定する旨の記載がない限り、これらの形態に限られるものではない。
【0024】
図3ないし図5は、本発明の実施形態に係る吸収性製品が示されており、その一例として幼児用パッドの構成を示している。この実施形態では、吸収性製品を代表させて幼児用パッドに適用した例を説明するが、全体の大きさを多少変えることで、同一の構造にて、失禁パッドや生理用ナプキン等にも適用できるものである。ここで、図3は、幼児用パッド20の概略斜視図であり、図中「前」と表示されている方が装着時に身体の前面側となる(他の図面に関しても同様)。図4は、図1の幼児用パッド20の裏側(内側)から見た概略裏面図、図5は図4のD−D線概略断面図であり、各断面図は理解の便宜のため、材料の切断部の厚みを実際より大きくして示している。
なお、幼児用パッドは、自分で行動するようになった幼児が、トイレでの排尿を行えるようになるまでの期間に使用される紙おむつや布製のパンツ等の内側に接着して使用するものであり、乳幼児期のものと比較すると、より多くの尿を吸収するためのパッドで、失禁パッドとほぼ同じものである。
【0025】
図3に示されているように、幼児用パッド20は、前後に長い形状を有している。この幼児用パッド20では、内側の中央付近には、長手方向にやや長い領域が、条溝40の内部の領域と相当する凸部47とされており、使用者の局部に適切に当接できるようにされている。凸部47の周囲は、後述する材料を押圧して設けた溝等で形成されるエンボスである条溝40で区画されている。条溝40の両側方には、それぞれ立体ギャザー部26,26が立ち上がっており、排泄された液体等が側方に漏れようとする場合の障壁とされている。
【0026】
図4および図5は、上述の各部位を形成するための詳細な構造を示しており、これらの図を参照しながら、幼児用パッド20の構造をさらに詳しく説明する。
図5に示されているように、幼児用パッド20は、使用者の身体に当接する側に、使用者の身体に接触するセンター表面材28が露出しており、このセンター表面材28により、サブレイヤー24やティッシュ27で包まれた吸収体23を覆う構造とされている。
【0027】
ティッシュ27と吸収体23は、使用者により排出された液体等を吸収して保持するための部分である。
ティッシュ27は、液体等を吸収する柔らかい材質、たとえばパルプ(バージンパルプ、古紙再生パルプ)、レーヨン、コットン、ケナフ、バガス、シルク、親水処理をした繊維(ポリオレフィン系、ポリエステル、アクリル)などを単一又は複合してシート化したものを用いている。ティッシュ27は、吸収体23の構成物が脱落しないよう覆うものであり、図5に示されているように、幅方向である短手方向Tにおける中央部からずれた位置で両端部が重ねられて接合されている。
【0028】
吸収体23は、センター表面剤28及びティッシュ27を介して吸収した液体を急速に拡散させた上で保持する性質を備えるものである。この実施形態では、吸収体23は、所謂「マット」材と呼ばれており、たとえばパルプに吸収材であるポリマーを混合したりパルプにポリマーを散布したりして形成するパルプ吸収体もしくはポリマー等が好ましい。ここでパルプは、たとえば木材を機械的または化学的に処理して、抽出したセルロース繊維の集合体であり、比較的繊維どうしの隙間がある状態で、吸収した液体の拡散を促進し、多量のポリマーを保持して、厚み方向の体積を大きくすることで液体の吸収容量を大きくしている。また、この厚み方向の体積を大きくしたことで、大きく突出した柔軟な凸部47を形成しており、その周囲を条溝40で区画している。この条溝40の構造は後で詳しく説明する。
【0029】
また、好ましくは、吸収体23および/またはサブレイヤー24には、幼児用パッド20を装着した使用者により尿等の排出があった場合に、温度変化を生じる物質もしくは部材(以下、「温度変化物質」という)(図示せず)を含有させることができる。
この温度変化物質は、吸収体23の表面または内部に含有させる他、ティッシュ27と吸収体23の間や、ティッシュ27とサブレイヤー24の間に配置してもよい。すなわち、使用者として、幼児を想定した場合等において、排泄があった場合、当該温度変化物質により生じる温度変化を装着している使用者が感知しやすい箇所に配置することが好ましい。
【0030】
温度変化物質としては、尿等と接触して温度変化を生じるものが使用され、この温度変化は熱を吸収もしくは放出して、周囲の温度を変化させることで、温度変化を幼児等に気づかせる役割を果たす。例えば、温度変化物質が尿等と触れることで、熱を吸収する場合には、冷たい着用感を与える。これにより、幼児等は排尿等の事実に気づき、介助者に知らせるきっかけをつくることができ、これを繰り返すことで、排尿等を知らせるトイレットのトレーニング効果を発揮する。
具体的には、温度変化物質としては、例えば、尿等の水溶液に接触すると熱を吸収または放出するもので、溶解状態と結晶状態との間でエネルギー差をもつ粒状体が使用できる。このような粒状体は、ポリマーと同じように、吸収体23に含ませたり、表面材28の近くに散布して配置したりすることができる。より具体的には、温度変化物質として熱を吸収するものは、塩の酸化物として例えば、酢酸ナトリウム、炭酸ナトリウム、硫酸ナトリウム、チオ硫酸ナトリウム、リン酸ナトリウム、無水塩として、例えば、硝酸アンモニウム、硝酸カリウム、有機物として例えば尿素、キシリトール、砂糖等のなかから選択して使用できる。また、溶解中熱を放出するものとしては、例えば、塩化アルミニウム、硫酸アルミニウム、カリウム硫酸アルミニウム等から選択して使用することができる。また、この他にも、尿と反応してレモン等のフルーツの香りを発生する等の芳香剤による芳香機能を付与してもよい。
【0031】
センター表面材28は直接使用者の肌に触れるために、肌を必要以上に損なうことなく肌触りの良い点を考慮してこれに適した材料が選択される。センター表面材28は内側のシートもしくはトップシート等とも呼んでおり、液体を透過させ特に速やかに液体成分が透過されるのに適した材質の繊維として、たとえば種々の天然繊維、合成繊維あるいはこれらの組み合わせから選択できる。たとえば合成繊維としては一例としてポリエステルやポリプロピレンのファイバーを素材として液体透過性をよくするように形成した繊維が好ましい。例えば、センター表面材28が不織布で作られる場合には、例えば、湿式不織布(紙、ティッシュ、ハイドロスパン(デクスター社)、ケミカルボンド(又はレジンボンド)、サーマルボンド(エンボス、エアスルー)、エアレイド、スパンレース、スパンボンド、メルトブローン、ニードルパンチ、ステッチボンド、そしてスパンボンドとメルトブローン不織布を複合して作られたSM不織布(スパンボンドとメルトブローンの積層体)、SMS不織布(スパンボンドとメルトブローンとスパンボンドの積層体)等が採用できる。この中ではセンター表面材28の材質としては、特にサーマルボンド、スパンボンド、スパンレースが好ましい。
【0032】
また、この実施形態では、好ましくは、使用者の身体と接する側において、センター表面材28と、ティッシュ27との間にサブレイヤー24を設けている。サブレイヤー24は、ポリプロピレンやポリエチレン、ポリエステル等の化学繊維を主に使用した厚みがあり、空隙率の高い嵩高な不織布で形成されている。そして、センター表面材28と重ねることで一体とされたもので、不織布に図3及び図4で散点状に符号Pで示したような微細なエンボス加工(ピンエンボス)を施すことで、サブレイヤー24の繊維が物理的に交絡されて一体化された拡散シートである。拡散シートを設けることにより、センター表面材28を透過してきた液体を吸収体23側へ急速に拡散させ、さらに、吸収体23に吸収した液体が身体側に戻ることを防ぐ機能を発揮する。
【0033】
吸収体23より下層には、図5に示すように、両側縁に沿って2つのサイド表面材29,30を配置して、立体ギャザー部26を設けている。
すなわち、サイド表面材29,30は、センター表面材28の長手方向L(図4に方向Lを表示)に沿って、センター表面材28の両側に配置されている。センター表面材28が液体を透過させることができるのに対して、サイド表面材29,30は液体の透過を防止するように、防水性もしくは疎水性の材質で作られている。
サイド表面材29,30の材質としては、たとえばポリオレフィン系不織布あるいはポリエステル系不織布と薄いプラスチックフィルムとを組み合わせたもの、ポリエステル系不織布等とポリエチレンフィルム等を組み合わせたもの、SM不織布、SMS不織布等が採用できる。
【0034】
左右の立体ギャザー部26,26は、それぞれサイド表面材29,30の少なくとも長手方向の中央部に弾性体15を配置することで形成されている。この弾性体15の弾性収縮能力により、折り返された各サイド表面材29,30の少くとも中央部(袋状の折り返し部分)に、図5に示すように立体ギャザー部26が形成されることになる。この立体ギャザー部26を形成することにより、使用者の排泄物もしくは液体成分が幼児用パッド20の短手方向(図4の長手方向Lと直交する方向)Tに沿って外側に漏れ出さないように使用者の身体に密着して阻止する。
【0035】
そして、上述したように、厚みの厚い吸収体23を備えた領域の両側部は、立体ギャザー部26,26の内側に位置しており、この立体ギャザー部26,26の起立作用により立ち上げられ、条溝40の外部領域に相当するサイドバリア部25,25とされている。これにより、立体ギャザー部26,26の上記作用に加えて、これらの内側で、横方向(図4の方向T)に漏れようとする液体等を効果的に吸収することで、さらに効果的に横漏れを阻止することができる。特に、サイドバリア部25,25に配置される吸収体23は、凸部47よりもその厚さを薄くすることで、変形しやすく、さらに条溝40で薄くされているため、サイドバリア部25,25が身体に適切にフィットするように変形しやすくなっている。
【0036】
立体ギャザー部26とティッシュ27に包まれた吸収体23の外側(図5の下方)には、バックシート39が固定されている。バックシート39は、外側のシート材であり、液体の透過を防止する材質により作られている。バックシート39の材質としては、たとえば薄いプラスチックフィルム、具体的には、ポリエチレンフィルムやポリエチレンラミネート紙等が使用できる。バックシート39は液体は通さないが好ましくは水蒸気を透過させて蒸れを防止でき、ある程度可撓性を備えている材質を選択する。これにより失禁パッド20の内側の内容物(汚物である固形物や尿、血液等)が外側に漏れ出ないようになっている。
【0037】
図5において、バックシート39の外側には貼着部51,51が設けられており、この貼着部51,51には、これにより、使用者の下着やおむつの内面に貼り付けられることで、幼児用パッド20の装着状態を安定的に保持し、位置ずれを防止するものである。
この貼着部51,51に対して、少なくとも貼着部51,51の全体を覆う大きさの剥離部材31が貼られている。剥離部材31は、例えば、一般的な剥離紙や包装フィルムの内面に剥離処理を行ったもの等が使用される。
【0038】
図6は、図4で示された幼児用パッド20の内面に設けられる条溝40だけを示す図であり、図7は条溝40の立体的構成を説明するために、その一部を拡大して示す概略斜視図で、材料の積層状態は省略している。図8は図6のA−A線概略断面図、図9は図6のB−B線概略断面図、図10は図6のC−C線概略断面図である。
これらの図を参照しながら、また、共通する基本的構成について図1を適宜参照しながら、幼児用パッド20に設けられる条溝40の詳細な構造について説明する。
【0039】
条溝40は、図5で説明した吸収体23が存在する領域に形成される所定幅TWの溝であり、チャネルエンボスである。この条溝40は、後述するような型を用いて、図5のセンター表面材28をサブレイヤー24やティシュ27や吸収体23とともに、バックシート39側に強く圧縮することにより、凹状の溝が図6に示すような形状となるように形成される。この場合、図6において、条溝40は中央部が幅の狭くなった環状に連続する溝とされているが、条溝40としては、中央付近で互いに内方に曲線状に入り込んでいる一対の部分40a,40aは、横漏れを防止するために必ず形成する。図6の上下の曲線状の部分40b,40bは、必ずしも形成しなくてもよい。
【0040】
条溝40は、その両側縁に沿って、内側高圧搾線51と外側高圧搾線52とを有している。これら内側高圧搾線51と外側高圧搾線52は、図1でも説明したように、それぞれ、多数の高圧搾部41が所定の間隔をおいて、長さ方向Lに沿って連続するように形成されたものである。内側高圧搾線51と外側高圧搾線52との間の42e及び、内側高圧搾線51と外側高圧搾線52の高圧搾部41が形成された領域以外は低圧搾部42である。
【0041】
図7ないし図10を参照して理解されるように、高圧搾部41は、条溝40内の最も深い部分である。低圧搾部42は、高圧搾部41よりも浅い部分である。このため、高圧搾部41は、表面材や吸収体が強く圧搾されており、材料どうしの隙間が小さく、体液等の液体を毛細管現象で急速に吸収する機能を発揮する。低圧搾部42は、高圧搾部よりも圧搾の程度が低いので、材料どうしの隙間が高圧搾部よりも大きく、吸収した液体の保持能力が高い。
一例として、図7において、全体の厚みTDに対して、低圧搾部42の深さD2はTDの10パーセントないし80パーセント、好ましくは40パーセントから60パーセントの範囲とされており、高圧搾部41の深さD1はTDの30パーセントから99パーセント、好ましくは60パーセントから90パーセントの範囲とされている。
【0042】
図1で説明したように、図1によれば、内側高圧搾線52に含まれる高圧搾部41a,41b,41cの矢印L方向に位置が、外側高圧搾線51に含まれる高圧搾部41d,41e,41fの矢印L方向の位置と相互に異なるように配置されている。
このため、図1に示されているように、使用者により排出された尿等の液体が、内側から条溝40に向かうと、内側高圧搾線52に属する高圧搾部41bに位置する液体S1は、高圧搾部41bに急速に吸収され、この高圧搾部41bはL方向に長く形成されているために、L方向、すなわち長さ方向に導かれる。そして、高圧搾部41bと高圧搾部41aの間の低圧搾部42に導かれ、吸収される。吸収しきれない液体は高圧搾部41aに吸収拡散される。かくして、横方向(T方向)に向かう液体は、先ず内側高圧搾線52により、L方向に拡散されつつ、順次吸収保持される。
【0043】
さらに、図1で示されているように、高圧搾部41bと41cの間の低圧搾部42bに吸収された液体S2は、一部が横方向に向かうことで、外側高圧搾線51の高圧搾部41eに吸収され、残りはS5としてL方向に搬送される。この外側高圧搾線51では、内側高圧搾線52と同様の作用で、S4として液体をL方向に拡散しつつ、順次吸収保持する。
【0044】
このように、本実施形態では、横方向に向かう尿等の液体をL方向に拡散吸収する2つの高圧搾線(外側高圧搾線51および内側高圧搾線52)を備えることで、液体を確実にL方向に拡散させることができ、しかも、各高圧搾部の間で保持することができる。これにより、横方向への液体の漏れを確実に防止できるとともに、2つの高圧搾線において、それぞれの高圧搾部がL方向の位置を変えて設けられているから、横方向(T方向)に向かう液体は、S1もS2も必ず、いずれかの高圧搾線の高圧搾部に吸収されて、L方向に導かれるので、液体の横漏れ防止が確実に行われる。
【0045】
そして、条溝40においては、図7の条溝の幅方向TWに関して、図1で説明したように、内側高圧搾線52の高圧搾部の幅寸法W1と、中間の低圧搾部42eの幅寸法W2と、外側高圧搾線51の高圧搾部との幅寸法W3を略1対1対1の同寸法としている。このため、条溝40では、全体として、低圧搾部42の占める領域がきわめて広く確保され、条溝40内に十分な液体を保持することができる。特に、内側高圧搾線52を超えて、横方向に移動する液体が中間の低圧搾部42eで吸収保持されることで、横漏れがより確実に防止される。また、低圧搾部42の領域がきわめて広いことで、比較的柔らかい領域が大きく、装着した際に使用者の肌に接触する部分に不快な刺激を与え、装着感を大きく損なうことが、より一層確実に防止される。さらに、中間の低圧搾部42eを有することにより、両側の高圧搾部の形態保持性が向上する。
【0046】
また、図1で示すように、高圧搾部41bの寸法L1(高圧搾部は全て同じ長さ寸法)が、前記所定間隔の寸法であるL2の2倍強から5倍の範囲、ここではほぼ4倍とされている。
これにより、これにより、チャネルエンボス内に吸収された尿等の液体を、各高圧搾部によって長さ方向、すなわちL方向に向かうよう移動させ、その移動した尿等をL2に当たる低圧搾部で一旦保持し、更に、低圧搾部で保持しきれなくなった尿等を、その低圧搾部の逆側に位置する高圧搾部で長さ方向L側に移動させることにより、吸収性製品の長さ方向に沿って尿等を確実に拡散することができる。
【0047】
また、各高圧搾部41は、図7ないし図10では、長円状であり、図1では長い矩形であるが、どちらの形態でもよい。
矩形の形態とした方が、製造時に各高圧搾部41の四隅の箇所に、圧搾の力が加わりやすく、加熱による熱を併用する場合には、この四隅の箇所において積層された材料が接合して、形を保持しやすい。
【0048】
また、図6に示されているように、条溝40の中央付近で互いに内方に曲線状に入り込んでいる一対の部分40a,40aに関して、これらが、図6の上端と下端において、曲線状に内方に向かうことで、互いに一体とされており、これらが各端部で曲線状に内方に向かって一体とされている箇所を除く領域、すなわち、部分40aでは、EA1からEA2までの領域、及び部分40bでは、EA3からEA4までの領域は、それぞれ高圧搾線と低圧搾線と低圧搾部とが形成されている。
すなわち、製造工程おいては、上記した図6において上端と下端の曲線状の箇所(EA1からEA3の領域、EA2からEA4の領域)には圧搾の際の力が大きく加わることから、高圧搾線と低圧搾線と低圧搾部とを、この領域以外の両側縁側に限定することで、圧搾の際の材料の破損が生じにくいとともに、両側縁領域に前記構造を設けることで、液体の横漏れを十分に防止することができる。
このように、条溝40によって、凸部47とされた条溝40の内部領域と、サイドバリア部25,25とされた条溝40の外部領域に区画されており、尿等の流れが条溝40によって区画される。
特に、条溝の外側に外部領域であるサイドバリア部25,25が配置されることで、万一、条溝40から僅かに漏れ出た尿等があった場合についても、外部領域における吸収体23で吸収保持させることができる。
【0049】
さらに、図8ないし図10で示す表面材28(センター表面材)及び/または吸収体23を構成する素材は、長手方向Lに沿った素材配向とされている。
このため、これらを構成する繊維等が、L方向へ沿った素材配向とされるよう、例えば、繊維から不織布を形成した表面材28について、幼児用パッド20を製造する工程において、連続するシート状とされた表面材28を一方に向かって引きながら製造することにより、繊維の基本的な方向性が、工程上で引かれた方向に向かうこととなり、素材配向と液体の搬送方向とが一致され、条溝40に沿った液体の搬送がより効果的に行うことができる。
特に幼児用パッド20や失禁パッドのように、尿を対象とした吸収性製品の場合、尿は経血や軟便等と比較して、粘性が低く、移動しやすいため、このような条溝40を形成することが好ましい。
【0050】
次に、条溝40の構造の理解の便宜のために、幼児用パッド20の製造工程における、条溝40の形成工程について、簡単に説明する。
図11は条溝40の形成に用いられる手段を模式的に示したもので、例えば第1のローラ61と第2のローラ62の間に、図5で説明した表面材28からバックシート39までの材料を積層したものを挟んで通すことにより、第1のローラ61と第2のローラ62との間で圧搾することで、条溝40を形成することができる。
特に幼児用パッド20や失禁パッドのように、尿を対象とした吸収性製品の場合、尿は経血や軟便等と比較して、粘性が低く、移動しやすいため、このような条溝40を形成することが好ましい。
【0051】
図12に示すように、型ローラである第2のローラ62の曲面状のローラ面62aには、条溝40の全体形状に対応する凸条63が形成されている。
凸条63には、図13に拡大して示すように、条溝40を構成するための形状とされており、凸条63の先端表面部が65で、これより突出する凸部が64である。先端表面部65と凸部64の高さの差は、条溝40の低圧搾部42と高圧搾部41との深さの違いに対応している。
【0052】
図14は、第1のローラ61と第2のローラ62との隙間部分の拡大部分断面図である。
凸条63の先端において、符号KDで示す深さが、圧搾により幼児用パッド20の表面材28側から入り込む深さ寸法である。つまり、凸条63の先端表面65は、表面材28から積層材料中に深さKDまで入り込んで、低圧搾部42を形成し、凸部64はこれよりさらに深く入り込んで、高圧搾部41を形成するようになっている。
【0053】
ここで、凸条63の幅OTWは、図7に示す条溝40の両側縁より外側に位置しており、実際の圧搾作業では、凸条63は、この幅OTWにわたって、表面材28側から積層材料を深さKDまで入り込んで圧搾するが、条溝40の幅TWより外側の部分は、材料の弾性により復帰して、ほとんど凹部とならない。
【0054】
ところで本発明は上記実施の形態に限定されるものではない。
上述の実施の形態の吸収性製品の例として幼児用パッドを図示しているが、これに限らず幼児用パッド以外の吸収性製品、たとえば失禁パッドや生理用ナプキン、おりものシート等種々の製品に適用することができる。
また、上述の実施形態では、1層構造の吸収体を用いた例を説明したが、吸収体は複数層もしくは多数層の吸収体層で構成してもよい。
上述の各実施形態の個別の構成は、必要により省略したり、説明しない他の構成と組み合わせてもよい。
【0055】
【発明の効果】
以上説明したように、本発明によれば、体液の横方向の漏れを確実に阻止して、縦方向に適度に拡散するように導くことができるようにした吸収性製品を提供することができる。
【図面の簡単な説明】
【図1】本発明の吸収性製品の条溝の構成と機能を説明するための概略平面図。
【図2】図1の条溝を説明するための比較例を示す図。
【図3】本発明の吸収性製品の実施形態に係る幼児用パッドの概略斜視図。
【図4】図3の幼児用パッドの裏側(内側)を表す概略裏面図。
【図5】図4のD−D線概略断面図。
【図6】図3の幼児用パッドの条溝の部分だけを拡大して示す概略図。
【図7】図6の条溝の一部を拡大して示す概略断面図。
【図8】図6のA−A線断面図。
【図9】図6のB−B線断面図。
【図10】図6のC−C線断面図。
【図11】図3の幼児用パッドの条溝を形成するための第1のローラと第2のローラを示す概略斜視図。
【図12】図3の幼児用パッドの条溝を形成するための第2のローラを示す概略斜視図。
【図13】図12の第2のローラのローラ面に設けた凸条を示す概略平面図。
【図14】図11の第1のローラ61と第2のローラ62との隙間部分の拡大部分断面図。
【図15】従来の吸収性製品の一例としての生理用ナプキンの概略斜視図。
【図16】図15の生理用ナプキンの圧搾条溝の拡大図。
【符号の説明】
20・・・幼児用パッド(吸収性製品)、23・・・吸収体、24・・・サブレイヤー、25,25・・・サイドバリア部(外部領域)、26,26・・・立体ギャザー部、27・・・ティッシュ、28・・・センター表面材、29,30・・・サイド表面材、31・・・剥離部材、40・・・条溝、41・・・高圧搾部、42・・・低圧搾部。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an absorbent product such as an incontinence pad, an infant pad, a sanitary napkin, a cage sheet, a breast milk pad, etc., which is disposed inside an underwear to absorb and retain body fluids such as urine and menstrual blood. It is.
[0002]
[Prior art]
Conventionally, absorbent products such as sanitary napkins are generally pad bodies formed in a rectangular or oval shape that is long in one direction, and the length direction is aligned in the front and back at a position corresponding to the crotch portion of the underwear. It is designed to receive bodily fluids such as menstrual blood discharged by the user.
In such an absorbent product, a liquid-impermeable sheet material is applied to a portion that becomes an outer surface when worn by a user, and an absorbent body for absorbing liquid such as menstrual blood is provided on the inside thereof. The sheet | seat material which permeate | transmits the liquid is arrange | positioned in the location which is arrange | positioned and also contacts a user's skin inside.
As a result, urine or the like, which is excrement, is prevented from permeating the sheet material that is permeable to the liquid and absorbed by the absorber, and further oozing out to the outside by the liquid-impermeable sheet material.
[0003]
FIG. 15 is a schematic perspective view showing an example of a conventional sanitary napkin (see Patent Document 1).
In the figure, a sanitary napkin 1 has a shape that is long in one direction, and is a liquid-permeable top sheet 2 that comes into contact with the human body surface, and a liquid-impermeable back sheet disposed on the back side in FIG. In addition, an absorber (not shown) provided between the back sheet and the top sheet 2 is included.
[0004]
On the surface sheet 2 side of the sanitary napkin 1, an annular pressing groove 5 formed by pressing the surface sheet 2 together with the absorber toward the back sheet side is provided.
FIG. 16 shows the squeezed groove 5 in an enlarged manner. In the squeezed groove 5, low-pressure squeezed portions 6 are formed at both side edges at predetermined intervals.
Thereby, the pressing groove 5 is a structure with a comparatively deep groove | channel, and the said low pressing part 6 has a structure where the degree of pressing is low and the groove depth is comparatively shallow.
[0005]
In this sanitary napkin 1, body fluid such as menstrual blood of the wearer flows in the lateral direction of the human body, enters the compressed groove 5, and guides it in the length direction, thereby trying to prevent lateral leakage. Is. And the low pressing part 6 which does not cross a groove | channel is provided in the both-sides edge of the pressing groove 5 along the each side edge at predetermined intervals, respectively. For this reason, compared with the case where a low pressing part is provided so that the pressing groove 5 may be crossed, this low pressing part will result in connecting the both sides of a pressing groove, and it is made not to leak sideways.
[0006]
[Patent Document 1]
JP 2003-38555 A
[0007]
[Problems to be solved by the invention]
By the way, in such a sanitary napkin 1, in the pressing groove 5, as shown in FIG. 16, the space | interval of the low pressing parts 6 arrange | positioned along the both-sides edge is large, and the low pressing part 6 does not exist. In the region, there is nothing to block body fluid such as menstrual blood that crosses the compressed groove 5 as indicated by an arrow A from the inside to the outside.
For this reason, although there exists an effect | action which guides bodily fluids, such as menstrual blood, to the length direction of this pressing groove 5 by the effect | action of the pressing groove 5, body fluids, such as menstrual blood, advance in the direction which crosses the pressing groove 5. Since little consideration has been given to blocking, side leakage still cannot be effectively prevented.
[0008]
Therefore, an object of the present invention is to provide an absorptive product that can reliably prevent leakage of body fluid in the lateral direction and guide it to diffuse appropriately in the longitudinal direction.
[0009]
[Means for Solving the Problems]
  According to the first aspect of the present invention, the back sheet has a shape that is long in one direction and prevents the permeation of liquid, and the liquid permeable surface material disposed on the surface side that contacts the body. And an absorber that is disposed between the back sheet and the surface material and absorbs and holds the liquid that has permeated the surface material, and the length direction of the region where the absorber exists It has at least a pair of grooves extending in the length direction at least in the vicinity of both side edges of the central portion, and squeezes the surface material and the absorber to the back sheet side along both side edges of the grooves. A plurality of high-pressure parts that are long in the length direction formed are provided with an inner high-pressure line and an outer high-pressure line that are formed so as to be continuous at predetermined intervals along each side edge, Between the inner high pressure line and the outer high pressure line, in the length direction A continuous low-pressure portion is provided, and each high-pressure portion included in each of the inner high-pressure wire and the outer high-pressure wire is formed by shifting the lengthwise positions of the grooves. AndFurthermore, about each edge part of the length direction of the high pressing part of the said inner high pressing line and the high pressing part of an outer high pressing line, one end part shall be made to exceed the edge of the other end part. Thus, the end portions are provided with overlapping portions in the width direction of the groove.Achieved by absorbent products.
[0010]
According to the configuration of the first aspect, the absorbent product of the present invention has a basic shape that is long in one direction by laminating and fixing a plurality of sheet-like materials. The back sheet prevents liquid permeation. The said surface material is a liquid-permeable thing arrange | positioned at the surface side which contacts a body. The absorber is disposed between the back sheet and the surface material and absorbs and holds the liquid that has passed through the surface material.
[0011]
Here, FIG. 1 is an explanatory view showing, in an enlarged manner, the configuration of the main part of the present invention. Note that not all the configurations shown in FIG. 1 are components of the invention of claim 1, and not all the configurations of the invention of claim 1 are shown in FIG. 1. .
In the region where the absorber exists, a groove 40 is provided as shown in an enlarged view in FIG. The L direction in the figure is the length direction, which coincides with the length direction of the absorbent product, and is the same when expressed as “longitudinal direction”. The arrow T direction is the width direction of the absorbent product.
[0012]
In FIG. 1, 40 is a groove | channel and is channel embossing. A plurality of or a plurality of high-pressure parts 41... Are provided on both side edges of the groove 40, and as shown in the drawing, the outer side edge of the groove 40 also has an inner side edge. In addition, high-pressure parts 41... Are provided. In the outer side edge, a line along with the plurality of high-pressure parts 41d, 41e, 41f is the outer high-pressure line. In the inner side edge portion, a line aligned with the plurality of high-pressure parts 41a, 41b, 41c is the inner high-pressure line. A predetermined interval L2 is provided between the high pressing portions in each side edge portion.
The area | region where each high pressing part 41 of the groove 40 is not provided is the low pressing part 42. The high pressing portion 41 is a portion having the deepest groove, and the low pressing portion 42 is a shallower groove portion than the high pressing portion 41. The high-pressure squeezing part 41 is strongly squeezed of the surface material and the absorbent body, and the gap between the materials is small, and exhibits a function of rapidly absorbing liquid such as body fluid by capillary action. Since the low-pressure squeezing part 42 has a lower level of squeezing than the high-pressure squeezing part, the gap between the materials is larger than that of the high-pressure squeezing part and has a constant absorption speed and a high ability to hold the absorbed liquid.
[0013]
In the present invention, “the high pressing parts included in the inner high pressing line and the outer high pressing line are formed by shifting the longitudinal positions of the grooves from each other”. As shown in FIG. 1, this indicates that the positions of the high pressure parts 41 a, 41 b, 41 c included in the inner high pressure line 52 in the direction of the arrow L are high pressure parts 41 d included in the outer high pressure line 51. , 41e, 41f are arranged so as to be different from the positions in the arrow L direction.
[0014]
For this reason, as shown in FIG. 1, when the liquid such as urine discharged by the user goes from the inside toward the groove 40, the liquid S <b> 1 located in the high pressure portion 41 b belonging to the inner high pressure line 52. Is rapidly absorbed by the high pressing portion 41b, and since this high pressing portion 41b is formed long in the L direction, it is guided in the L direction, that is, the length direction as shown in S3. And it is guide | induced to the low pressing part 41a between the high pressing part 41b and the high pressing part 41a, and is absorbed. The liquid that cannot be absorbed is absorbed and diffused into the high pressure portion 41a. Thus, the liquid traveling in the lateral direction (T direction) is first absorbed and held in sequence while being diffused in the L direction by the inner high-pressure line 52.
[0015]
Next, the liquid absorbed in the low pressure portion 42b between the high pressure portions 41b and 41c is partially directed to the L direction as S5, and the rest is directed to the lateral direction as S2, so that the outer high pressure portion 51 Absorbed by the high pressure portion 41e. In this outer high pressing line 51, the liquid is diffused in the L direction as shown in S4 and is sequentially absorbed and held by the same action as the inner high pressing line 52.
Thus, in the present invention, by providing two high-pressure squeezes (outer high-pressure squeezed 51 and inner high-pressure squeezed 52) that diffusely absorb the liquid such as urine that goes in the lateral direction in the L direction, the liquid is surely obtained. It can be diffused in the L direction and can be held between the high pressure parts. As a result, liquid leakage in the lateral direction can be reliably prevented, and in each of the two high-pressure lines, the respective high-pressure parts are provided by changing the position in the L direction, so that the horizontal direction (T direction). Since the liquid which goes to is surely absorbed by the high pressing part of one of the high pressing lines and guided to the L direction, the liquid side leakage prevention is surely performed. That is, the high pressing parts 41-1a, 41-1b, 41-1c, and 41-1d, 41 belonging to the parallel two high pressing lines as in the groove 40-1 of FIG. -1e and 41-1f are provided at the same position in the L direction, the liquid S6 is guided in the L direction, but the liquid S7 passing between them has a diffusion action in the L direction. It is weak and may cause side leakage.
[0016]
  Moreover, for the purpose of only the diffusion of the liquid in the L direction, as in the groove 40-2 of FIG. There is no function of holding the liquid diffused in the L direction, and only the liquid that has been diffused and the liquid that is not held leaks in either direction. Furthermore, since the area of the strongly squeezed region becomes too large and the entire groove 40-2 becomes excessively hard, it gives an unpleasant stimulus to the portion that comes into contact with the user's skin when worn. The feeling will be greatly impaired.
  Further, with reference to FIG. 1, when looking at the high pressing part 41 c of the inner high pressing line 52, in the drawing of the high pressing part 41 e of the outer high pressing line 51, the dimensions of the lower pressing part 41 f of the high pressing part 41 f are shown. In the figure, it is arranged at a position overlapping with the upper end in the dimension of D2.
  For this reason, body fluid such as urine that moves in the lateral direction is always absorbed in the high-pressure portion of the inner high-pressure line 52 or the high-pressure portion of the outer high-pressure line 51 and diffused in the length direction L. Side leakage can be prevented more reliably.
[0018]
  The invention of claim 2 is the configuration of claim 1,With respect to the width direction of the groove, the width dimensions of the high pressure portion of the inner high pressure line, the low pressure portion, and the high pressure portion of the outer high pressure line are substantially the same. And
  According to the configuration of claim 2,In FIG. 1, the width dimension W1 of the high pressing part of the inner high pressing line 52, the width dimension W2 of the intermediate low pressing part 42e, and the width dimension W3 of the high pressing part of the outer high pressing line 51 are approximately 1: 1. The dimensions are the same as in pair 1. For this reason, the area | region of the low pressing part 42 is ensured very widely, and sufficient liquid can be hold | maintained in the groove 40. FIG. In particular, since the liquid that moves in the lateral direction beyond the inner high-pressure line 52 is absorbed and held by the intermediate low-pressure part 42e, side leakage is more reliably prevented. Moreover, since the area | region of the low pressing part 42 is very wide, a comparatively soft area | region is large, and when it mounts | wears, each high pressing part 51 and 52 which was squeezed strongly and became comparatively hard contacts a user's skin. It is more reliably prevented that an unpleasant stimulus is given to the portion and the wearing feeling is greatly impaired. Furthermore, by having the intermediate low pressing part 42e, the form retainability of the high pressing parts on both sides is improved.
[0019]
  The invention of claim 3 is the configuration of claim 1 or 2,Regarding the high pressure parts of the inner high pressure line and the high pressure parts of the outer high pressure line, each high pressure part has the same size in the length direction, and the dimension of the predetermined interval is It is characterized by being in the range of approximately 20 percent to 49 percent of the dimension in the length direction of the high-pressure portion.
  According to the configuration of claim 3,If it demonstrates with reference to FIG. 1, the dimension L1 (all the high pressing parts will be the same length dimension) of the high pressing part 41b shall be the range of 2 times more than L2 which is the dimension of the said predetermined space | interval. .
  As a result, the liquid such as urine absorbed in the channel embossing is moved by each high-pressure squeezing part in the length direction L, and the moved urine etc. is temporarily held by the low-pressure squeezing part corresponding to L2, Because urine etc. that can no longer be held by the pressing part is moved to the length direction L side by the high-pressure pressing part located on the opposite side of the low-pressure expression part, urine etc. is surely ensured along the length direction of the absorbent product Can diffuse.
[0020]
  According to a fourth aspect of the present invention, in any one of the first to third aspects,The groove is a pair of grooves having a narrow interval in at least a central portion in the length direction of the region where the absorber is present, and the pair of grooves are in the length direction of the absorber. By going inward in a curved shape on both end sides, they are integrated with each other to separate the inner region of the groove and the outer region of the groove, and at least the curved shape of the groove The high-pressure squeezing line, the low-pressure squeezing line, and the low-pressure squeezing part are formed in the pair of grooves up to a position facing inward.
  According to the configuration of claim 4,In the manufacturing process, since the force at the time of squeezing is greatly applied to the curved portion, by limiting the high-pressure squeezing line, the low-pressure squeezing line and the low-pressure squeezing part to both side edges other than this region, The material is not easily damaged during pressing, and the side leakage of the liquid can be sufficiently prevented by providing the structure in both side edge regions. In addition, a low pressing line is an area | region where the low pressing part 42e is continuing along the L direction in FIG.
  In addition, by dividing the absorbent product into an inner region and an outer region by the groove, the direction in which urine etc. flows so as to be moved from the inner region to the groove is determined, and further urine leaking from the groove is Even if it exists, it can be guide | induced to an external area | region and urine etc. can be hold | maintained with the absorber of this external area | region.
[0021]
  A fifth aspect of the present invention is the construction of any one of the first to fourth aspects,The high pressure portion and the low pressure portion have a plurality of linear boundaries, and the linear boundaries are formed in parallel.
  According to the configuration of claim 5,As shown in FIG. 1, each high pressing portion 41 has a rectangular outer shape, so that the boundary with the low pressing portion becomes two sets of boundary lines parallel to each other. For this reason, since the 90 degree corner | angular part which a boundary line cross | intersects is formed, in the manufacturing process, the force of pressing is applied efficiently and form retainability improves.
[0022]
  The invention of claim 6 is the structure of any one of claims 1 to 5,At least a part of the surface material and the absorber has a material orientation along the longitudinal direction.
  According to the structure of Claim 6,Since the liquid such as urine is easily guided along the direction in which the material such as the fiber used for the surface material is arranged, at least a part of the surface material and the absorber is in the longitudinal direction, that is, in the L direction. By adopting the material orientation, the material orientation of the surface material and the absorbent body and the liquid transport direction are matched, and the liquid transport along the groove 40 is more effectively performed.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.
Note that the embodiments described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these forms.
[0024]
3 to 5 show an absorbent product according to an embodiment of the present invention. As an example, the structure of an infant pad is shown. In this embodiment, an example in which the absorbent product is represented as an example will be described, but it is applied to an incontinence pad, a sanitary napkin, etc. with the same structure by slightly changing the overall size. It can be done. Here, FIG. 3 is a schematic perspective view of the infant pad 20, and the direction labeled “front” in the figure is the front side of the body when worn (the same applies to other drawings). 4 is a schematic back view seen from the back side (inside) of the infant pad 20 of FIG. 1, FIG. 5 is a schematic cross-sectional view taken along the line DD of FIG. 4, and each cross-sectional view is made of a material for convenience of understanding. The thickness of the cut portion is shown larger than the actual thickness.
Infants' pads are used to attach to the inside of paper diapers and cloth pants that are used until the infant who has acted on his / her own can urinate in the toilet. Yes, it is a pad that absorbs more urine compared to that of an infant, and is almost the same as an incontinence pad.
[0025]
As shown in FIG. 3, the infant pad 20 has a long shape in the front-rear direction. In the infant pad 20, a region that is slightly longer in the longitudinal direction is formed as a convex portion 47 that corresponds to the region inside the groove 40 in the vicinity of the center of the inner side, and can be appropriately brought into contact with the local area of the user. Has been. The periphery of the convex portion 47 is partitioned by a groove 40 which is an emboss formed by a groove or the like provided by pressing a material described later. The three-dimensional gathers 26 and 26 stand up on both sides of the groove 40, and serve as a barrier when the excreted liquid or the like is about to leak to the side.
[0026]
4 and 5 show a detailed structure for forming the above-described parts, and the structure of the infant pad 20 will be described in more detail with reference to these drawings.
As shown in FIG. 5, the infant pad 20 has a center surface material 28 that is in contact with the user's body exposed on the side that is in contact with the user's body. The absorber 23 is covered with the sublayer 24 and the tissue 27.
[0027]
The tissue 27 and the absorber 23 are parts for absorbing and holding the liquid discharged by the user.
The tissue 27 is made of a soft material that absorbs liquid, such as pulp (virgin pulp, recycled recycled paper), rayon, cotton, kenaf, bagasse, silk, hydrophilic treated fibers (polyolefin, polyester, acrylic), etc. Alternatively, a composite sheet is used. The tissue 27 covers the constituents of the absorber 23 so as not to fall off, and as shown in FIG. 5, both end portions are overlapped at positions shifted from the central portion in the lateral direction T which is the width direction. Are joined.
[0028]
The absorbent body 23 has a property of rapidly diffusing the liquid absorbed through the center surface agent 28 and the tissue 27 and holding it. In this embodiment, the absorber 23 is referred to as a so-called “mat” material. For example, a pulp absorber or a polymer formed by mixing a polymer that is an absorbent material with pulp or spraying a polymer with pulp. Is preferred. Here, pulp is an aggregate of cellulose fibers extracted by mechanically or chemically treating wood, for example, and promotes diffusion of absorbed liquid in a state where there are relatively gaps between fibers. The liquid absorption capacity is increased by holding the polymer and increasing the volume in the thickness direction. Further, by increasing the volume in the thickness direction, a flexible protruding portion 47 that protrudes greatly is formed, and the periphery thereof is partitioned by the groove 40. The structure of the groove 40 will be described later in detail.
[0029]
Preferably, the absorber 23 and / or the sub-layer 24 is a substance or member (hereinafter referred to as “temperature change”) that causes a temperature change when urine or the like is discharged by a user wearing the infant pad 20. (Referred to as “substance”) (not shown).
The temperature changing substance may be contained on the surface or inside of the absorber 23, or may be disposed between the tissue 27 and the absorber 23, or between the tissue 27 and the sublayer 24. That is, when excretion occurs when an infant is assumed as a user, it is preferable that the user is placed at a location where the user wearing the temperature change caused by the temperature change substance can easily detect.
[0030]
Substances that cause temperature changes when used in contact with urine, etc. are used as temperature change substances. This temperature change absorbs or releases heat and changes the ambient temperature, so that infants and others can notice the temperature change. Play a role. For example, when a temperature change substance absorbs heat by touching urine or the like, a cold wearing feeling is given. In this way, the infant or the like can notice the fact of urination and the like, and can create an opportunity to inform the caregiver. By repeating this, the toilet training effect of informing urination and the like is exhibited.
Specifically, as the temperature change substance, for example, a substance that absorbs or releases heat when it comes into contact with an aqueous solution such as urine, and a granular material having an energy difference between a dissolved state and a crystalline state can be used. Such a granular material can be included in the absorber 23 or can be dispersed and arranged near the surface material 28 in the same manner as the polymer. More specifically, those that absorb heat as a temperature change substance include, for example, sodium acetate, sodium carbonate, sodium sulfate, sodium thiosulfate, sodium phosphate, and anhydrous salts such as ammonium nitrate and potassium nitrate. The organic substance can be selected from urea, xylitol, sugar and the like. Moreover, as what releases heat | fever during melt | dissolution, it can select and use from aluminum chloride, aluminum sulfate, potassium aluminum sulfate, etc., for example. In addition, a fragrance function by a fragrance such as a fruit scent such as lemon reacting with urine may be imparted.
[0031]
Since the center surface material 28 directly touches the user's skin, a material suitable for the center surface material 28 is selected in consideration of a good touch without damaging the skin more than necessary. The center surface material 28 is also called an inner sheet or a top sheet, and as a fiber of a material suitable for allowing a liquid to permeate and a liquid component to permeate quickly, for example, various natural fibers, synthetic fibers or these fibers can be used. You can choose from combinations. For example, as a synthetic fiber, for example, a fiber formed from polyester or polypropylene fiber so as to improve liquid permeability is preferable. For example, when the center surface material 28 is made of a non-woven fabric, for example, a wet non-woven fabric (paper, tissue, hydrospun (Dexter), chemical bond (or resin bond), thermal bond (embossed, air-through), airlaid, span Lace, spunbond, meltblown, needle punch, stitchbond, SM nonwoven fabric (spunbond and meltblown laminate), SMS nonwoven fabric (spunbond and meltblown laminate) The center surface material 28 is particularly preferably a thermal bond, a spunbond, or a spunlace.
[0032]
In this embodiment, preferably, the sublayer 24 is provided between the center surface material 28 and the tissue 27 on the side in contact with the user's body. The sublayer 24 has a thickness mainly using chemical fibers such as polypropylene, polyethylene, and polyester, and is formed of a bulky nonwoven fabric having a high porosity. Then, it is integrated by overlapping with the center surface material 28, and the non-woven fabric is subjected to fine embossing (pin embossing) as indicated by the reference symbol P in FIG. 3 and FIG. It is a diffusion sheet in which the fibers of the layer 24 are physically entangled and integrated. By providing the diffusion sheet, the liquid that has passed through the center surface material 28 is rapidly diffused to the absorber 23 side, and further, the function of preventing the liquid absorbed by the absorber 23 from returning to the body side is exhibited.
[0033]
In the lower layer than the absorber 23, as shown in FIG. 5, two side surface materials 29 and 30 are disposed along both side edges, and a three-dimensional gather portion 26 is provided.
That is, the side surface materials 29 and 30 are disposed on both sides of the center surface material 28 along the longitudinal direction L (indicated by the direction L in FIG. 4) of the center surface material 28. The center surface material 28 can transmit the liquid, whereas the side surface materials 29 and 30 are made of a waterproof or hydrophobic material so as to prevent the liquid from transmitting.
As the material of the side surface materials 29 and 30, for example, a polyolefin nonwoven fabric or a combination of a polyester nonwoven fabric and a thin plastic film, a combination of a polyester nonwoven fabric and a polyethylene film, an SM nonwoven fabric, an SMS nonwoven fabric, or the like is adopted. it can.
[0034]
The left and right three-dimensional gathers 26 and 26 are formed by disposing the elastic body 15 at least in the center in the longitudinal direction of the side surface materials 29 and 30, respectively. Due to the elastic contraction ability of the elastic body 15, the three-dimensional gathered portion 26 is formed in at least the center portion (bag-like folded portion) of each folded side surface material 29, 30 as shown in FIG. 5. Become. By forming the three-dimensional gather portion 26, the excrement or liquid component of the user is prevented from leaking outward along the short side direction (direction perpendicular to the longitudinal direction L in FIG. 4) T of the infant pad 20. In close contact with the user's body.
[0035]
And as above-mentioned, the both sides of the area | region provided with the thick absorber 23 are located inside the solid gathers 26 and 26, and are started by the standing action of these solid gathers 26 and 26. The side barrier portions 25 and 25 correspond to the outer region of the groove 40. Thereby, in addition to the above-described operation of the three-dimensional gather portions 26, 26, by effectively absorbing the liquid or the like that leaks in the lateral direction (direction T in FIG. 4) inside these, Side leakage can be prevented. In particular, the absorber 23 disposed in the side barrier portions 25, 25 is easily deformed by making its thickness thinner than that of the convex portion 47, and is further thinned by the groove 40, so that the side barrier portion 25 25 are easily deformed so as to fit the body appropriately.
[0036]
A back sheet 39 is fixed to the outer side (lower side in FIG. 5) of the absorbent body 23 wrapped in the three-dimensional gather portion 26 and the tissue 27. The back sheet 39 is an outer sheet material, and is made of a material that prevents permeation of liquid. As a material of the back sheet 39, for example, a thin plastic film, specifically, a polyethylene film, polyethylene laminated paper, or the like can be used. The back sheet 39 does not allow liquid to pass through, but is preferably selected from a material that can permeate water vapor to prevent stuffiness and has some degree of flexibility. As a result, the contents inside the incontinence pad 20 (solid matter such as filth, urine, blood, etc.) do not leak to the outside.
[0037]
In FIG. 5, the sticking parts 51 and 51 are provided in the outer side of the back seat | sheet 39, and by this, the sticking parts 51 and 51 are stuck by the user's underwear and the inner surface of a diaper. Thus, the mounting state of the infant pad 20 is stably maintained, and displacement is prevented.
A peeling member 31 having a size covering at least the whole of the sticking parts 51, 51 is stuck to the sticking parts 51, 51. As the peeling member 31, for example, a general release paper or an inner surface of a packaging film subjected to a peeling process is used.
[0038]
6 is a view showing only the groove 40 provided on the inner surface of the infant pad 20 shown in FIG. 4, and FIG. 7 is an enlarged view of a part of the groove 40 for explaining the three-dimensional configuration. In the schematic perspective view shown, the laminated state of materials is omitted. 8 is a schematic sectional view taken along line AA in FIG. 6, FIG. 9 is a schematic sectional view taken along line BB in FIG. 6, and FIG. 10 is a schematic sectional view taken along line CC in FIG.
The detailed structure of the groove 40 provided in the infant pad 20 will be described with reference to these drawings and with reference to FIG.
[0039]
The groove 40 is a groove having a predetermined width TW formed in a region where the absorber 23 described with reference to FIG. 5 is present, and is channel embossing. The groove 40 is formed into a concave groove by strongly compressing the center surface material 28 of FIG. 5 to the back sheet 39 side together with the sublayer 24, the tissue 27, and the absorber 23 using a mold as will be described later. It is formed to have a shape as shown in FIG. In this case, in FIG. 6, the groove 40 is an annular continuous groove having a narrow central portion, and the groove 40 is a pair of grooves that are inwardly curved in the vicinity of the center. The portions 40a and 40a are always formed in order to prevent side leakage. The upper and lower curved portions 40b and 40b in FIG. 6 are not necessarily formed.
[0040]
The groove 40 has an inner high pressure line 51 and an outer high pressure line 52 along both side edges. As described with reference to FIG. 1, the inner high-pressure line 51 and the outer high-voltage line 52 are formed such that a large number of high-pressure parts 41 are continuous along the length direction L with a predetermined interval. It has been done. Other than the region where the high pressure portion 41 of the inner high pressure wire 51 and the outer high pressure wire 52 is formed between the inner high pressure wire 51 and the outer high pressure wire 52 is the low pressure portion 42.
[0041]
As will be understood with reference to FIGS. 7 to 10, the high pressing portion 41 is the deepest portion in the groove 40. The low pressure portion 42 is a shallower portion than the high pressure portion 41. For this reason, the high pressure part 41 has the surface material and absorber strongly squeezed, the gap between the materials is small, and exhibits a function of rapidly absorbing liquid such as body fluid by capillary action. Since the low-pressure squeezing part 42 has a lower level of squeezing than the high-pressure squeezing part, the gap between the materials is larger than that of the high-pressure squeezing part, and the ability to hold the absorbed liquid is high.
As an example, in FIG. 7, the depth D2 of the low-pressure portion 42 is in the range of 10 to 80 percent, preferably 40 to 60 percent of the TD with respect to the total thickness TD. The depth D1 is in the range of 30 to 99 percent, preferably 60 to 90 percent of TD.
[0042]
As illustrated in FIG. 1, according to FIG. 1, the position of the high pressure parts 41 a, 41 b, 41 c included in the inner high pressure line 52 in the direction of arrow L is the high pressure part 41 d included in the outer high pressure line 51. , 41e, 41f are arranged so as to be different from the positions in the arrow L direction.
For this reason, as shown in FIG. 1, when the liquid such as urine discharged by the user goes from the inside toward the groove 40, the liquid S <b> 1 located in the high pressure portion 41 b belonging to the inner high pressure line 52. Is rapidly absorbed by the high pressing portion 41b, and since this high pressing portion 41b is formed long in the L direction, it is guided in the L direction, that is, the length direction. And it is guide | induced to the low pressing part 42 between the high pressing part 41b and the high pressing part 41a, and is absorbed. The liquid that cannot be absorbed is absorbed and diffused into the high pressure portion 41a. Thus, the liquid traveling in the lateral direction (T direction) is first absorbed and held in sequence while being diffused in the L direction by the inner high-pressure line 52.
[0043]
Furthermore, as shown in FIG. 1, the liquid S2 absorbed in the low pressure portion 42b between the high pressure portions 41b and 41c partially moves in the lateral direction, so that the height of the outer high pressure portion 51 is increased. It is absorbed by the pressing part 41e, and the rest is conveyed in the L direction as S5. In this outer high pressing line 51, the same action as the inner high pressing line 52 is performed, and the liquid is sequentially absorbed and held as S4 while diffusing in the L direction.
[0044]
Thus, in this embodiment, by providing two high pressure lines (the outer high pressure line 51 and the inner high pressure line 52) that diffusely absorb the liquid such as urine that goes in the lateral direction in the L direction, the liquid is surely obtained. Can be diffused in the L direction, and can be held between the high pressure parts. As a result, liquid leakage in the lateral direction can be reliably prevented, and in each of the two high-pressure lines, the respective high-pressure parts are provided by changing the position in the L direction, so that the horizontal direction (T direction). Since the liquid which goes to is surely absorbed by the high pressing part of one of the high pressing lines and guided to the L direction, the liquid side leakage prevention is surely performed.
[0045]
And in the groove | channel 40, as demonstrated in FIG. 1 regarding the width direction TW of the groove | channel of FIG. 7, the width dimension W1 of the high pressing part of the inner side high pressing line 52, and the width | variety of the intermediate | middle low pressing part 42e. The width W3 between the dimension W2 and the high-pressure portion of the outer high-pressure line 51 is set to the same dimension of approximately 1: 1. For this reason, in the groove 40, the area occupied by the low-pressure portion 42 is ensured as a whole, and a sufficient liquid can be held in the groove 40. In particular, since the liquid that moves in the lateral direction beyond the inner high-pressure line 52 is absorbed and held by the intermediate low-pressure part 42e, side leakage is more reliably prevented. Further, since the area of the low-pressure portion 42 is extremely wide, a relatively soft area is large, and when worn, it gives an unpleasant stimulus to a portion that comes into contact with the user's skin and greatly impairs the wearing feeling. It is surely prevented. Furthermore, by having the intermediate low pressing part 42e, the form retainability of the high pressing parts on both sides is improved.
[0046]
Moreover, as shown in FIG. 1, the dimension L1 of the high pressing part 41b (all the high pressing parts have the same length dimension) is in the range of slightly more than two times to five times L2, which is the dimension of the predetermined interval, here, approximately It is supposed to be 4 times.
Thereby, the liquid such as urine absorbed in the channel embossing is moved in the length direction, that is, in the L direction by each high-pressure squeezing part, and the moved urine etc. is temporarily stored in the low-pressure squeezing part corresponding to L2. The length direction of the absorbent product by holding and further moving the urine etc. that can no longer be held in the low-pressure squeezed part to the length direction L side in the high-pressure squeezed part located on the opposite side of the low-pressure squeezed part The urine and the like can be diffused with certainty.
[0047]
Moreover, although each high pressing part 41 is an ellipse shape in FIG. 7 thru | or 10, and is a long rectangle in FIG. 1, either form may be sufficient as it.
When the rectangular shape is used, the pressing force is easily applied to the four corners of each high-pressure portion 41 at the time of manufacture. When heat from heating is used in combination, the materials stacked at the four corners are joined. It is easy to hold the shape.
[0048]
Further, as shown in FIG. 6, with respect to the pair of portions 40a and 40a that are inwardly curved in the vicinity of the center of the groove 40, these are curved at the upper and lower ends of FIG. In the region excluding the locations where these are integrated inward in a curved shape at each end, that is, in the portion 40a, from EA1 to EA2 In the region and the portion 40b, the regions from EA3 to EA4 are formed with a high pressing line, a low pressing line, and a low pressing part, respectively.
That is, in the manufacturing process, since the force at the time of pressing is greatly applied to the curved portions (EA1 to EA3 region, EA2 to EA4 region) of the upper end and the lower end in FIG. By limiting the squeezing line and the squeezed portion to both side edges other than this region, the material is not easily damaged during squeezing. Can be sufficiently prevented.
As described above, the groove 40 is partitioned into the inner region of the groove 40 formed as the convex portion 47 and the outer region of the groove 40 formed as the side barrier portions 25 and 25, and the flow of urine or the like is defined. It is partitioned by the groove 40.
In particular, when the side barrier portions 25, 25, which are external regions, are arranged outside the groove, even if there is urine or the like slightly leaking from the groove 40, the absorber in the external region 23 can be absorbed and held.
[0049]
Further, the material constituting the surface material 28 (center surface material) and / or the absorber 23 shown in FIG. 8 to FIG. 10 has a material orientation along the longitudinal direction L.
For this reason, in the process of manufacturing the infant pad 20, for example, the surface material 28 in which the nonwoven fabric is formed from the fibers so that the fibers and the like constituting them are oriented in the L direction, the sheet shape is continuous. When the surface material 28 is made to be drawn toward one side, the basic directionality of the fiber is directed in the direction drawn in the process, and the material orientation and the liquid transport direction are matched. The liquid can be transported along the groove 40 more effectively.
In particular, in the case of an absorptive product intended for urine, such as an infant pad 20 or an incontinence pad, urine has a lower viscosity and is easier to move than menstrual blood, loose stool, and the like. Is preferably formed.
[0050]
Next, for the convenience of understanding the structure of the groove 40, a process of forming the groove 40 in the manufacturing process of the infant pad 20 will be briefly described.
FIG. 11 schematically shows the means used to form the groove 40. For example, between the first roller 61 and the second roller 62, the surface material 28 to the back sheet 39 described in FIG. The groove 40 can be formed by squeezing between the first roller 61 and the second roller 62 by sandwiching the laminated material.
In particular, in the case of an absorptive product intended for urine, such as an infant pad 20 or an incontinence pad, urine has a lower viscosity and is easier to move than menstrual blood, loose stool, and the like. Is preferably formed.
[0051]
As shown in FIG. 12, the convex roller 63 corresponding to the entire shape of the groove 40 is formed on the curved roller surface 62 a of the second roller 62 which is a mold roller.
As shown in an enlarged view in FIG. 13, the protrusion 63 has a shape for forming the groove 40, the front surface portion of the protrusion 63 is 65, and the protrusion protruding from this is 64. is there. The difference in height between the tip surface portion 65 and the convex portion 64 corresponds to the difference in depth between the low pressure portion 42 and the high pressure portion 41 of the groove 40.
[0052]
FIG. 14 is an enlarged partial cross-sectional view of a gap portion between the first roller 61 and the second roller 62.
At the tip of the ridge 63, the depth indicated by the symbol KD is a depth dimension that enters from the surface material 28 side of the infant pad 20 by pressing. That is, the tip surface 65 of the ridge 63 enters the laminated material from the surface material 28 to the depth KD to form the low-pressure portion 42, and the convex portion 64 penetrates deeper than this, It comes to form.
[0053]
Here, the width OTW of the ridge 63 is positioned outside both side edges of the groove 40 shown in FIG. 7, and the ridge 63 extends from the surface material 28 side over the width OTW in the actual pressing operation. The laminated material is squeezed into the depth KD, but the portion outside the width TW of the groove 40 is restored by the elasticity of the material and hardly becomes a recess.
[0054]
By the way, the present invention is not limited to the above embodiment.
Although an infant pad is illustrated as an example of the absorbent product of the above-described embodiment, the present invention is not limited thereto, and various products such as an absorbent product other than the infant pad, such as an incontinence pad, a sanitary napkin, and a cage sheet. Can be applied to.
In the above-described embodiment, an example in which an absorber having a single-layer structure is used has been described. However, the absorber may be composed of a plurality of absorber layers.
The individual configurations of the above-described embodiments may be omitted as necessary, or may be combined with other configurations not described.
[0055]
【The invention's effect】
As described above, according to the present invention, it is possible to provide an absorptive product that can reliably prevent leakage of body fluid in the lateral direction and guide it so as to diffuse appropriately in the longitudinal direction. .
[Brief description of the drawings]
FIG. 1 is a schematic plan view for explaining the configuration and function of a groove of an absorbent product according to the present invention.
FIG. 2 is a view showing a comparative example for explaining the groove in FIG. 1;
FIG. 3 is a schematic perspective view of an infant pad according to an embodiment of the absorbent product of the present invention.
4 is a schematic back view showing the back side (inside) of the infant pad in FIG. 3; FIG.
5 is a schematic sectional view taken along line DD of FIG.
6 is an enlarged schematic view showing only the groove portion of the infant pad shown in FIG. 3;
7 is an enlarged schematic cross-sectional view showing a part of the groove in FIG. 6;
8 is a cross-sectional view taken along line AA in FIG.
9 is a sectional view taken along line BB in FIG.
10 is a cross-sectional view taken along the line CC of FIG.
11 is a schematic perspective view showing a first roller and a second roller for forming the groove of the infant pad of FIG. 3. FIG.
12 is a schematic perspective view showing a second roller for forming the groove of the infant pad of FIG. 3. FIG.
13 is a schematic plan view showing ridges provided on the roller surface of the second roller in FIG. 12. FIG.
14 is an enlarged partial cross-sectional view of a gap portion between the first roller 61 and the second roller 62 in FIG.
FIG. 15 is a schematic perspective view of a sanitary napkin as an example of a conventional absorbent product.
16 is an enlarged view of the compressed groove of the sanitary napkin of FIG.
[Explanation of symbols]
20 ... Infant pad (absorbent product), 23 ... Absorber, 24 ... Sublayer, 25, 25 ... Side barrier part (external area), 26, 26 ... Solid gather part 27 ... Tissue, 28 ... Center surface material, 29, 30 ... Side surface material, 31 ... Peeling member, 40 ... Strip groove, 41 ... High pressure part, 42 ...・ Low pressure squeezing part.

Claims (6)

一方向に長い形状を有しており、
液体の透過を防止するバックシートと、
身体に接触する面側に配置される液体透過性の表面材と、
前記バックシートと前記表面材との間に配置されて前記表面材を透過した液体を吸収して保持する吸収体と
を備えていて、
前記吸収体の存在する領域の前記長さ方向の少なくとも中央部の両側縁付近において、長さ方向に延びる少なくとも一対の条溝を有しており、
前記条溝の両側縁に沿って、前記表面材及び吸収体を前記バックシート側に圧搾して形成した前記長さ方向に長い多数の高圧搾部が、各側縁に沿って、所定の間隔をおいて連続するように形成されてなる内側高圧搾線と外側高圧搾線とを設け、
前記内側高圧搾線と外側高圧搾線との間には、前記長さ方向に連続する低圧搾部が設けられていて、
さらに、前記内側高圧搾線と外側高圧搾線とにそれぞれ含まれる前記各高圧搾部が、前記条溝の長さ方向の位置を互いにずらして形成されており、
さらに、
前記内側高圧搾線の高圧搾部と外側高圧搾線の高圧搾部との長さ方向の各端部について、一方の端部が他方の端部の端縁を超えるようにされることで、該端部どうしが、前記条溝の幅方向に関して、重なる部分を備えている
ことを特徴とする吸収性製品。
Has a long shape in one direction,
A backsheet to prevent liquid permeation;
A liquid-permeable surface material disposed on the side of the surface that contacts the body;
An absorber that is disposed between the back sheet and the surface material and absorbs and holds the liquid that has passed through the surface material;
At least a pair of grooves extending in the length direction in the vicinity of both side edges of at least the center portion in the length direction of the region where the absorber exists,
A number of high pressure parts long in the length direction formed by pressing the surface material and the absorber to the back sheet side along both side edges of the groove, along each side edge, at predetermined intervals. An inner high pressing line and an outer high pressing line formed so as to be continuous are provided,
Between the inner high pressing line and the outer high pressing line, a low pressing section that is continuous in the length direction is provided,
Furthermore, each said high pressing part contained in each of the said inner high pressing line and an outer high pressing line is formed shifting the position of the length direction of the said groove | channel, mutually,
further,
For each end in the length direction of the high pressure portion of the inner high pressure line and the high pressure portion of the outer high pressure line, one end portion exceeds the edge of the other end portion, The absorbent product , wherein the end portions are provided with overlapping portions in the width direction of the groove .
前記条溝の幅方向に関して、内側高圧搾線の高圧搾部と、前記低圧搾部と、外側高圧搾線の高圧搾部との各幅寸法がほぼ同一となるようにされていることを特徴とする請求項1に記載の吸収性製品。With respect to the width direction of the groove, the width dimensions of the high pressure portion of the inner high pressure line, the low pressure portion, and the high pressure portion of the outer high pressure line are substantially the same. The absorbent product according to claim 1 . 前記内側高圧搾線の多数の高圧搾部と、前記外側高圧搾線の多数の高圧搾部に関して、各高圧搾部は長さ方向に寸法が同一であり、前記所定の間隔の寸法が、この高圧搾部の長さ方向の寸法のほぼ20パーセントないし49パーセントとなるようにされていることを特徴とする請求項1または2に記載の吸収性製品。Regarding the high pressure parts of the inner high pressure line and the high pressure parts of the outer high pressure line, each high pressure part has the same size in the length direction, and the dimension of the predetermined interval is The absorbent product according to claim 1 or 2, characterized in that it is approximately 20 to 49 percent of the lengthwise dimension of the high-pressure part. 前記条溝は、前記吸収体の存在する領域の前記長さ方向の少なくとも中央部において、間隔を狭くした一対の条溝であり、これら一対の条溝は、前記吸収体の前記長さ方向の両端部側で曲線状に内方に向かうことで、互いに一体とされて前記条溝の内部領域と、前記条溝の外部領域とを区分しており、さらに、少なくとも、前記条溝の曲線状に内方に向う箇所まで、前記一対の条溝に、前記高圧搾線と低圧搾線と低圧搾部とが形成されていることを特徴とする請求項1ないし3のいずれかに記載の吸収性製品。The groove is a pair of grooves having a narrow interval in at least a central portion in the length direction of the region where the absorber is present, and the pair of grooves are in the length direction of the absorber. By going inward in a curved shape on both end sides, they are integrated with each other to separate the inner region of the groove and the outer region of the groove, and at least the curved shape of the groove The absorption according to any one of claims 1 to 3, characterized in that the high-pressure squeezing line, the low-pressure squeezing line, and the low-pressure squeezing part are formed in the pair of grooves up to a position facing inward. Sex products. 前記高圧搾部と前記低圧搾部とは複数の線形の境界を有しており、これらの線形境界が平行となるように形成されていることを特徴とする請求項1ないし4のいずれかに記載の吸収性製品。The said high pressing part and the said low pressing part have a some linear boundary, These linear boundaries are formed so that it may become parallel , In any one of Claim 1 thru | or 4 characterized by the above-mentioned. Absorbent product as described . 前記表面材及び前記吸収体の少なくとも一部が、前記長手方向に沿った素材配向とされていることを特徴とする請求項1ないし5のいずれかに記載の吸収性製品。The absorptive product according to any one of claims 1 to 5 , wherein at least a part of the surface material and the absorbent body has a material orientation along the longitudinal direction.
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Cited By (33)

* Cited by examiner, † Cited by third party
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