JP4392936B2 - Sanitary napkins - Google Patents

Sanitary napkins Download PDF

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Publication number
JP4392936B2
JP4392936B2 JP2000015941A JP2000015941A JP4392936B2 JP 4392936 B2 JP4392936 B2 JP 4392936B2 JP 2000015941 A JP2000015941 A JP 2000015941A JP 2000015941 A JP2000015941 A JP 2000015941A JP 4392936 B2 JP4392936 B2 JP 4392936B2
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raised portion
forming sheet
sheet
elastic member
raised
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JP2001204759A (en
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洋司 亀尾
美次 濱島
哲哉 草川
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花王株式会社
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【0001】 [0001]
【発明の属する技術分野】 BACKGROUND OF THE INVENTION
本発明は、フィット性及び液漏れ防止性に優れた吸収性物品に関する。 The present invention relates to an absorbent article which is excellent in fit and leakage prevention property.
【0002】 [0002]
【従来の技術及び発明が解決しようとする課題】 A conventional technology and to be Solved by the Invention
弾性部材を伸張させその収縮力によって吸収性物品の表面を凸型形状とし、着用者の身体へのフィット性を向上させようとする吸収性物品が提案されている。 By its contraction force to stretch the elastic member to the surface of the absorbent article and convex shape, the absorbent article to try to improve the fitness to the wearer's body it has been proposed. 例えば、特表平9−507033号公報には、衛生ナプキンにおける吸収コアの非肌当接面側に、ナプキン幅方向に伸張させた状態の弾性部材を固定し、該弾性部材の収縮によりナプキンの表面を凸型形状とした技術が開示されている。 For example, JP Hei 9-507033, the non-skin facing side of the absorbent core in the sanitary napkin, the elastic member while being stretched on a napkin width direction is fixed, the napkin by contraction of the elastic member techniques and convex shape of the surface is disclosed. このナプキンにおいては、吸収コアのみで凸型形状を形成している。 In this napkin, forming a convex shape only on the absorbent core. 着用者の動きに対して吸収コア自身が凸型形状を安定に保つ為には、吸収コアの剛性を高くすることが必要である。 For absorbent core itself keep the convex shape stable against the movement of the wearer, it is necessary to increase the rigidity of the absorbent core. しかし、剛性が高過ぎてしまうと、着用者の身体への吸収コアの追随性が悪くなり、フィット性が低下してしまう。 However, the rigidity is too high, becomes poor conformability of the absorbent core to the wearer's body, fit is lowered. 即ち、吸収コア自身で凸型形状を安定に保つことと、着用者の身体への追随性を向上させることは、相反する事象となる。 That is, a keeping a convex shape stable in the absorbent core itself, is to improve the followability to the wearer's body, the opposite event.
【0003】 [0003]
特開平11−313851号公報には、吸液性コアの非肌当接面側に、該吸液性コアよりも高い曲げ剛性を有する裏打ちシートを配し、該裏打ちシートと弾性部材とを組み合わせて、吸収性物品の内部に逆V字型の空間を形成した生理用ナプキンが開示されている。 Japanese Unexamined Patent Publication No. 11-313851, the non-skin facing side of the absorbent core, arranged backing sheet having a higher flexural rigidity than the at least one absorbent core, combining the said backing sheet and the elastic member Te, inverted V-shaped sanitary napkin which is formed a space is disclosed in the interior of the absorbent article. 前記裏打ちシートは、不織布、プラスチックフィルム、開孔プラスチックフィルム等のシート材料からなり、吸液性コアよりも剛性の高いものである。 The backing sheet is a nonwoven fabric, plastic film, made from a sheet material such as apertured plastic films, those higher rigidity than the absorbent core. 従って、該裏打ちシートを用いれば前記空間は形成可能となるが、これと同時に高い剛性はシートの柔軟性や可撓性を低下させる原因ともなる。 Thus, although the said space can be formed by using the said backing sheet, and at the same time high rigidity also causes a reduction in the flexibility or flexibility of the sheet. その結果、着用者の排泄部とナプキンとの間に隙間が出来易くなったり、或いはナプキンの装着感が悪化し易くなってしまう。 As a result, or it is likely to be a gap, or the fit of the napkin becomes liable to deteriorate between the excretory part and the napkin of the wearer.
【0004】 [0004]
従って、本発明は、着用者の動きに対し常に排泄部にフィットして液漏れを効果的に防止し得る吸収性物品を提供することを目的とする。 Accordingly, an object of the present invention to provide an absorbent article that can effectively prevent leakage fit always excretory part to the wearer's movements.
【0005】 [0005]
【課題を解決するための手段】 In order to solve the problems]
本発明は、液透過性の表面層、液不透過性の裏面層及び該表面層と該裏面層との間に介在する液保持性の吸収層を有する生理用ナプキンにおいて、 The present invention is liquid permeable surface layer, the sanitary napkin having a liquid-retentive absorbent layer interposed between the liquid impermeable back layer and the surface layer and the back surface layer,
前記吸収層と前記裏面層との間に折曲回復性を有する隆起部形成シートが配されており、該隆起部形成シートの両側部が、幅方向に伸張された状態の隆起部形成弾性部材にそれぞれ固定され、該隆起部形成弾性部材の収縮状態において前記隆起部形成シートが前記表面層側に隆起して前記生理用ナプキンの幅方向略中央部に凸状の隆起部が形成されており、 Ridge forming sheet have been provided, both sides of the raised portion forming sheet, ridge formation elastic member in a state of being stretched in the width direction having a folding recovery between the back layer and the absorbent layer in respectively fixed, are該隆convex ridges the ridge forming sheet is raised to the surface layer side in the width direction substantially central portion of the sanitary napkin in the contracted state of the raised portion forming the elastic member is formed ,
前記隆起部形成シートには、折曲のための可撓軸が該隆起部形成シートの長手方向に沿って複数形成されており、 Wherein the raised portion forming sheet, formed with a plurality flexible shaft along the longitudinal direction of the raised portion forming sheet for folding,
前記隆起部形成シートが、熱可塑性樹脂からなる不織布又は発泡体から構成されている同種又は異種の二枚のシートを含み、折曲のための前記可撓軸が該隆起部形成シートの長手方向に沿って複数形成されるようにエンボス加工が施され、前記二枚のシートが多数の密着部によって接合されて前記可撓軸が形成されていると共に該密着部の間に両者が離間した非密着部が存しており、 前記隆起部形成シートの坪量が30〜500g/cm 2 であり、 Wherein the raised portion forming sheet comprises a homogenous or two sheets of different and a Do that nonwoven fabric or foam of a thermoplastic resin, wherein the flexible shaft has the raised portion forming sheet for folding embossing is performed so as to form a plurality in the longitudinal direction, is both between said seal attaching portion together with the flexible shaft said two sheets are joined by a number of contact portions are formed non-contacted portion spaced has been the presence, the basis weight of the raised portion forming sheet is 30 to 500 g / cm 2,
また、前記隆起部の周囲に、前記表面層、前記吸収層、前記隆起部形成シート及び前記隆起部形成弾性部材が一体的に圧密化されて液の吸収が可能な閉じた構造の防漏溝が形成されており、 Further, the periphery of the raised portion, the surface layer, the absorbent layer, wherein the raised portion forming sheet and the raised portions forming the elastic member is integrally compacted by absorbed is closed structure capable of liquid Bomomizo There are formed,
閉じた構造の前記防漏溝は、略半円状の前方溝と、生理用ナプキンの長手方向に沿う中心線の方向に湾曲した形状の中央溝と、細長の楕円形を短径部分で切断した形状の後方溝とから構成されており、 The anti Momizo closed structure, cutting a semicircular front groove, and a central groove having a shape curved in the direction of the center line along the longitudinal direction of the sanitary napkin, elongated oval in the short diameter portion It is composed of the rear groove of the shape,
前記隆起部の位置における厚みTが、490Pa荷重下において5〜20mmで且つ4903Pa荷重下において3〜10mmであり、490Pa荷重下における厚みと4903Pa荷重下における厚みとの比(前者/後者)が1.5〜4である生理用ナプキン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 thickness T at the position of the raised portion is a 3~10mm in and 4903Pa under load in 5~20mm under 490Pa load, the ratio of the thickness under thickness and 4903Pa load under 490Pa load (former / latter) is 1 is obtained by achieving the above object by providing a sanitary napkin is .5~4.
【0006】 [0006]
【発明の実施の形態】 DETAILED DESCRIPTION OF THE INVENTION
以下本発明を、その好ましい実施形態に基づき図面を参照しながら説明する。 The present invention will be described with reference to the drawings based on its preferred embodiments. 図1には、本発明の吸収性物品の一実施形態としての生理用ナプキンを、トップシート側から見た平面図が示されており、図2には、図1におけるII−II線断面図が示されている。 FIG. 1, the sanitary napkin as an embodiment of an absorbent article of the present invention, there is shown a plan view seen from the top sheet side, in FIG. 2, II-II line sectional view in FIG. 1 It is shown.
【0007】 [0007]
図1に示す生理用ナプキン1は、縦長の形状をしており、液透過性の表面層を構成するトップシート2、液不透過性の裏面層を構成するバックシート3及びトップシート2とバックシート3との間に介在する液保持性の吸収層4を有している。 Sanitary napkin 1 shown in FIG. 1 has a vertically long shape, the top sheet 2 forming the liquid-permeable surface layer, a backsheet 3 and the topsheet 2 and the back constituting the liquid-impermeable back layer It has an absorption layer 4 of a liquid retentive interposed between the seat 3. バックシート3の外面には、ナプキン1を着用者の着衣に固定するための粘着剤層9,9が形成されている。 The outer surface of the backsheet 3, the adhesive layer 9 and 9 for fixing the napkin 1 to the garment of the wearer is formed. 以上の部材としては、従来のナプキンに用いられているものと同様のものを用いることができる。 More The member may be the same as those used in conventional napkins.
【0008】 [0008]
吸収層4とバックシート3との間には、矩形状の隆起部形成シート5が配されている。 Between the absorbent layer 4 and the back sheet 3, rectangular ridges forming sheet 5 is disposed. 隆起部形成シート5は、ナプキン1の長手方向中央部よりも前方に偏倚した位置に配されている。 Ridge forming sheet 5 is disposed in a position offset forward from the longitudinal center of the napkin 1. 隆起部形成シート5は、吸収層4の下面に当接しており、吸収層4の下面に間欠的に接合固定されている。 Ridge forming sheet 5, the lower surface of the absorbent layer 4 abuts, are intermittently joined and fixed to the lower surface of the absorbent layer 4. 隆起部形成シート5の下面における左右両側部は、同様に矩形状のシートからなる隆起部形成弾性部材6の上面における左右両側部に接合固定されている。 Left and right side portions of the lower surface of the raised portion forming sheet 5 is joined and fixed to both left and right side portions of the upper surface of the raised portion forming the elastic member 6 made of a rectangular sheet as well. 隆起部形成弾性部材6の下面における左右両側部は、バックシート3の上面にそれぞれ接合固定されている。 Left and right side portions of the lower surface of the raised portion forming the elastic members 6 are respectively joined and fixed to the upper surface of the backsheet 3. この接合位置は、隆起部形成シート5と隆起部形成弾性部材6との接合位置にほぼ対向している。 The bonding position is substantially opposite to the joint position of the raised portion forming sheet 5 and the raised portion forming the elastic member 6. 隆起部形成弾性部材6は、その幅方向に伸張された状態で隆起部形成シート5に接合固定されている。 Ridges forming the elastic member 6 is joined and fixed to the raised portion forming sheet 5 in a state of being stretched in the width direction. また隆起部形成弾性部材6は、その自由状態(弛緩状態)でバックシート3と接合固定されている。 The ridges forming the elastic member 6 is joined and fixed with the back sheet 3 in its free state (relaxed state). 更に、隆起部形成シート5と隆起部形成弾性部材6との接合位置において、これらの部材と共に吸収層4及びトップシート2が、一体的に接合固定されていると共に圧密化されている。 Further, in the joining position of the raised portion forming sheet 5 and the raised portion forming the elastic member 6, the absorption layer 4 and the topsheet 2 with these members it has been compacted together are integrally joined and fixed. そして、本実施形態のナプキン1においては、その自由状態(弛緩状態)において、隆起部形成弾性部材6が収縮した状態となっており、これによって隆起部形成シート5がトップシート2側に隆起する。 Then, in the napkin 1 of this embodiment, in its free state (relaxed state), the ridges forming the elastic member 6 has a contracted state, whereby the ridge forming sheet 5 is raised to the top sheet 2 side . その結果、ナプキン1の幅方向略中央部で且つ長手方向中央部よりも前方に偏倚した位置に、凸状の隆起部7が形成されている。 As a result, the position offset forward from and longitudinal center in the width direction substantially central portion of the napkin 1, the convex ridge portion 7 is formed.
【0009】 [0009]
隆起部7は、着用者の排泄部にフィットし得る形状であれば、その形状に特に制限はなく、例えば逆U字状及び逆V字状等の形状が挙げられる。 Ridges 7 have a shape that can fit into the excretion portion of the wearer, not particularly limited in shape, for example, shapes such as inverted U-shaped and inverted V-shaped and the like.
【0010】 [0010]
隆起部形成シート5としては、隆起部7の凸状形状を安定的に保持し得るもの、例えば、熱可塑性樹脂からなる不織布や発泡体等が挙げられる。 The ridges forming sheet 5, may also be stably hold the convex shape of the raised portion 7, if example embodiment, nonwoven fabric or foam, etc. made of a thermoplastic resin. 該不織布は、例えばポリエチレン、ポリプロピレン、ポリエステル、ナイロン、ポリウレタン等の合成樹脂からなる繊維、及びこれらの樹脂の二種の組み合わせからなる芯鞘型やサイド・バイ・サイド型の複合繊維等から構成される。 The nonwoven fabric is constituted of, for example, polyethylene, polypropylene, polyester, nylon, fibers made of a synthetic resin such as polyurethane, and core-sheath type or side-by-side type composite fibers consisting of a two combinations of these resins that. また該発泡体は、ポリエチレン、酢酸ビニル、ポリウレタン、ポリブタジエン等から構成される。 The foam consists of polyethylene, vinyl acetate, polyurethane, polybutadiene or the like.
【0011】 [0011]
隆起部形成シート5は、適度な剛性、折曲回復性及び柔軟性を有していることが好ましい。 Ridge forming sheet 5, moderate rigidity, it is preferable to have a folding recovery and flexibility. 隆起部形成シート5にこのような特性を付与する方法としては、前述した樹脂から構成される不織布又は発泡体に、熱エンボス等を用いて部分的に熱圧縮成形を施せばよい。 As a method for imparting such characteristics to the ridges forming sheet 5, the nonwoven or foam composed of a resin described above, partially it may be subjected to thermal compression molding using a heat embossing or the like. 特に、折曲に対する可撓軸が隆起部形成シート5の長手方向に沿って形成されるように、前記熱圧縮成形を施す。 In particular, as the flexible shaft for folding are formed along the longitudinal direction of the ridge forming sheet 5, to facilities the thermal compression molding.
【0012】 [0012]
前記熱圧縮成形のパターンとしては、図3(a)に示す直線状パターン、図3(b)に示す波線状パターンが例示される。 The pattern of the heat compression molding, linear pattern as shown in FIG. 3 (a), the wavy pattern shown in FIG. 3 (b) are exemplified.
【0013】 [0013]
特に、 剛性、折曲回復性及び柔軟性が一層良好になる点から、図2に示すように、隆起部形成シート5が、同種又は異種の二枚のシート5a,5bから構成されており、両シート5a,5bが多数の密着部51によって接合されていると共に該密着部51の間に両者が離間した非密着部52が存するシートを用いる In particular, the rigidity, in view of the bending recovery and flexibility become better, as shown in FIG. 2, the ridges forming sheet 5, the same or different two sheets 5a, is composed of a 5b, both sheets 5a, 5b are used a sheet non-contact portion 52 both are spaced between said seal attaching portion 51 resides with are joined by a number of contact portions 51. このような隆起部形成シート5は、例えばスチールマッチエンボス加工によって製造できる。 Such ridges forming sheet 5 can be produced, for example by steel matched embossing. 更に、図2に示す隆起部形成シート5において、両シート5a,5b間にこれらのシートと異種のシートが介在しており、密着部51においては三者が密着して圧密化状態となっており、非密着部52においては三者が非圧密化状態となっているシートを用いることも好ましい。 Further, the ridge forming sheet 5 shown in FIG. 2, both sheets 5a, between 5b has sheets intervention of these sheets and heterogeneous, the adhesion unit 51 is a compaction state close contact tripartite cage, it is also preferable to use a sheet which has been three parties a non-compacted state in the non-contact portion 52.
【0014】 [0014]
適度な剛性、折曲回復性及び柔軟性を有する隆起部形成シート5としては、前述のものの他に、二次元状又は三次元状に捲縮した芯鞘型やサイド・バイ・サイド型の複合繊維をエアレイド法により堆積させて繊維ウエブを形成し、該繊維ウエブにおける構成繊維の交絡点を熱風によって融着させて形成されたサクションヒートボンド不織布も好ましく用いられる。 Appropriate rigidity, as ridges forming sheet 5 having a bending recovery and flexibility, in addition to the foregoing, a composite of two-dimensionally or three-dimensionally core-sheath crimped to or side-by-side fibers deposited by air-laid method to form a fiber web, the suction heat-bonded nonwoven fabric of the inter-woven points of the constituent fibers formed by fusing by hot air in the fibrous web is also preferably used. このサクションヒートボンド不織布を構成する前記複合繊維は、5〜15mm程度の短繊維であることが好ましい。 The composite fiber constituting the suction heat-bonded nonwoven fabric is preferably a short fiber of about 5 to 15 mm.
【0015】 [0015]
隆起部形成シート5は、 隆起部7の凸状形状の保持、及び着用者の身体への隆起部7のフィット性向上の点から、その坪量が30〜500g/m 2 であり好ましくは 50〜300g/m 2である Ridge forming sheet 5 is held in the convex shape of the raised portion 7, and from the viewpoint of fit improvement ridges 7 to the wearer's body, a basis weight of 30 to 500 g / m 2, preferably it is a 50~300g / m 2. また、隆起部形成シート5は、その厚みが490Pa(5gf/cm 2 )荷重下において0.3〜5mm、特に0.5〜3mmであることが、隆起部7の安定形成、装着中のナプキン1の違和感防止、隆起部7の可撓性及び柔軟性の点で好ましい。 Further, the raised portion forming sheet 5, 0.3 to 5 mm in the thickness of 490Pa (5gf / cm 2) under a load, to be particularly 0.5 to 3 mm, stable formation of the raised portion 7, the napkin during wear 1 of discomfort prevention, it preferred in terms of flexibility and softness of the ridges 7.
【0016】 [0016]
隆起部形成シート5は、その曲げ剛性が2×10 -3 〜5×10 -2 gf・cm 2 /cm、特に3×10 -3 〜2×10 -2 gf・cm 2 /cmであることが、隆起部7の安定形成、装着中のナプキン1の違和感防止、隆起部7の可撓性及び柔軟性、並びに装着中のナプキン1の身体への追随性の点で好ましい。 Ridge forming sheet 5, that the bending stiffness is 2 × 10 -3 ~5 × 10 -2 gf · cm 2 / cm, especially 3 × 10 -3 ~2 × 10 -2 gf · cm 2 / cm but stable formation of the ridges 7, discomfort preventing the napkin 1 during wear, flexibility and softness of the ridges 7, and preferable in view of followability of the napkin 1 of the body during wear.
【0017】 [0017]
更に、隆起部形成シート5は、その折曲回復力が、1×10 -3 〜2.5×10 -2 gf・cm/cm、特に2×10 -3 〜2×10 -2 gf・cm/cmであることが、装着中に着用者の歩行等の動作に起因してナプキン1の幅方向から圧縮が加わった場合に身体への追随性が良好になる点、及び装着中のナプキン1の違和感を防止する点から好ましい。 Furthermore, the raised portion forming sheet 5, that occasion songs resilience, 1 × 10 -3 ~2.5 × 10 -2 gf · cm / cm, in particular 2 × 10 -3 ~2 × 10 -2 gf · cm / it is cm is, that the followability of due to the operation such as walking of the wearer during wear in the width direction of the napkin 1 to the body when the compression is applied is improved, and the napkin during wear 1 from the viewpoint of preventing the sense of discomfort.
【0018】 [0018]
前記曲げ剛性及び前記折曲回復力は次のように測定される。 The bending rigidity and the bending recovery force is measured as follows. 測定にはカトーテック製のKES−FB2(商品名)を用いる。 Measurements To use the KES-FB2 (trade name) manufactured by Kato Tech. 隆起部形成シート5を、吸収性物品の長手方向に相当する方向に長さ20mm、吸収性物品の幅方向に相当する方向に40mm切りだし、測定サンプルとする。 The ridges forming sheet 5, the length 20mm in the direction corresponding to the longitudinal direction of the absorbent article, cut out 40mm in a direction corresponding to the width direction of the absorbent article, as a measurement sample. 測定サンプルの長手方向(20mm)の両サイドをチャックに固定し(チャック間距離約1cm)、曲率加速度(曲げ変形速度)0.5cm -1 /secで、曲率2.5cm -1まで曲げ変形させた後、同じ速度で元の状態に回復させる。 Both sides of the measurement sample in the longitudinal direction (20 mm) was fixed to a chuck (chuck distance of about 1 cm), with a curvature acceleration (bending deformation rate) 0.5cm -1 / sec, deformed bent to a curvature 2.5 cm -1 after, to restore to its original state at the same speed. 曲げ変形時における曲率0.5cm -1時の曲げモーメントM1及び曲率1.5cm -1時の曲げモーメントM2を求め、曲率0.5cm -1から曲率1.5cm -1まで変形するのに要する曲げモーメントを以下の式(1)から求め、この値を曲げ剛性とする。 Bending Bending calculated bending moments M1 and curvature 1.5cm bending moment M2 o'clock -1 o'clock curvature 0.5 cm -1 when deformed, required to deform the curvature 0.5 cm -1 to curvature 1.5cm -1 moment calculated from the equation (1) below, and this value flexural rigidity.
曲げ剛性=M2−M1 (1) Flexural rigidity = M2-M1 (1)
折曲回復力は次のように測定される。 Bending recovery force is measured in the following manner. 曲げ剛性と同様の測定法にて、前記測定サンプルを曲率2.5cm -1まで曲げ変形させた後、元の状態に回復させる過程で曲率1.5cm -1まで回復した時の曲げ回復モーメントM3を求める。 At the bending stiffness and the same measurement method, after bending deformation of the measurement sample to the curvature 2.5 cm -1, at the time of recovery in the process of restoring the original state to the curvature 1.5 cm -1 bending recovery moment M3 the seek. この値を折曲回復力とする。 This value is the bending resilience.
【0019】 [0019]
隆起部形成弾性部材6は、伸縮可能な材料から構成されている。 Ridges forming the elastic member 6 is composed of a stretchable material. 該材料としては、天然ゴム、ポリブタジエン、ポリウレタン、スチレン−ブタジエン共重合体、スチレン−イソプレン共重合体、エチレンと1−オクテンとの共重合体等のエチレン−αオレフィン共重合体、エチレンとアクリル酸エチルとの共重合体等が挙げられる。 The material, natural rubber, polybutadiene, polyurethane, styrene - butadiene copolymer, styrene - isoprene copolymers, ethylene -α-olefin copolymer such as a copolymer of ethylene and 1-octene, ethylene and acrylic acid a copolymer of ethyl.
【0020】 [0020]
隆起部形成弾性部材6は、前記材料から構成されたフィルム、不織布、織布等であり得る。 Ridges forming the elastic member 6, a film composed of the material, non-woven fabric may be a woven fabric or the like. また、前記材料から構成された複数本の糸状体又は狭幅の帯状体を、ナプキン1の幅方向と平行に所定間隔を置いて又は間隔を置かずに配列したものであってもよい。 Moreover, the strip of the filament or narrow a plurality of which are constructed from the material, or may be arranged without placing the width direction or spacing parallel to a predetermined interval of the napkin 1.
【0021】 [0021]
隆起部形成弾性部材6と隆起部形成シート5とは、両者の両側部の位置において互いに接合固定されており、その他の位置においては固定されていない。 And ridges formed elastic member 6 and the raised portion forming sheet 5, at the position of both sides of both are joined and fixed together, not fixed in other positions. 隆起部形成弾性部材6と隆起部形成シート5との固定間隔は、隆起部形成弾性部材6を伸張させたときの最大長さで15〜70mm、特に30〜60mmであることが、着用者の排泄部に適切にフィットするのに十分な高さの隆起部7が形成される点から好ましい。 Fixed distance between the ridges forming the elastic member 6 and the raised portion forming sheet 5, 15~70Mm the maximum length of time that is stretched ridges forming the elastic member 6, to be particularly 30 to 60 mm, the wearer from the viewpoint of the ridges 7 of sufficient height is formed to fit properly in the excretion portion. 前記最大長さとは、隆起部形成シート5に、隆起形成弾性部材6を固定する間隔であり、隆起形成弾性部材6が収縮した状態での距離ではなく、隆起形成弾性部材6を伸張させて隆起部形成シート5に固定するときの固定間隔を意味している。 Wherein the maximum length, the ridges forming sheet 5, a distance for fixing the ridge-forming elastic member 6, instead of the distance in a state in which the ridge-forming elastic member 6 is contracted, by stretching the ridge forming elastic member 6 protuberance it means a fixed interval when fixing the part forming the seat 5.
【0022】 [0022]
隆起部形成弾性部材6と隆起部形成シート5との固定方法としては、ホットメルト接着剤を用いた接合のほか、超音波シールやヒートシールなどが挙げられる。 The method of fixing the raised part formed an elastic member 6 and the raised portion forming sheet 5, in addition to bonding using a hot melt adhesive, such as ultrasonic sealing or heat sealing and the like.
【0023】 [0023]
特に好ましくは、後述する防漏溝を形成するのと同時に、トップシート2、吸収層4、隆起部形成シート5及び隆起部形成弾性部材6を、熱エンボス加工によって一体的に接合固定することが、製造工程の簡略化の点から好ましい。 Particularly preferably, at the same time as forming the anti Momizo described below, the top sheet 2, the absorbent layer 4, a raised portion forming sheet 5 and the ridges forming the elastic member 6, to be joined and fixed integrally by hot embossing , preferable from the viewpoint of simplification of a manufacturing process. これと共に、図2に示すように、隆起部形成弾性部材6は、その下面側における左右両側部が、ホットメルト接着剤8,8によってバックシート3に接合固定されている。 At the same time, as shown in FIG. 2, the raised portions forming the elastic member 6, the right and left side portions of the lower surface side is joined and fixed to the backsheet 3 by hot melt adhesive 8,8. また、バックシート3の外面には前述の通り粘着剤層9,9が形成されている。 Further, as described above adhesive layers 9 are formed on the outer surface of the backsheet 3. 粘着剤層9は、ナプキン1の長手方向に延びる帯状の形状をしており、二本形成されている。 Adhesive layer 9 has a band-like shape extending in the longitudinal direction of the napkin 1, are two forms. 粘着剤層9,9は、隆起部の頂部が位置するナプキン1の幅方向の中央部には設けられていないことが好ましい。 Adhesive layers 9 is preferably the top of the raised portion is not provided in the central portion in the width direction of the napkin 1 to be located. ナプキン1の幅方向の中央部における粘着剤層の形成されていない領域の幅、即ち粘着剤層9,9の幅方向内側縁同士の間隔は5〜40mm、特に10〜25mmであることが好ましい。 It is preferable that the width of the region is not formed in the adhesive layer, i.e. the width direction inner edge distance between the adhesive layer 9,9 is 5 to 40 mm, in particular 10~25mm at the center in the width direction of the napkin 1 . 隆起部形成弾性部材6の接合状態、及び粘着剤層9,9の形成パターンをこのようにすることによって、着用者の排泄部に適切にフィットするのに十分な高さの隆起部7が形成され、また着用時にも、着用者の動作時にも、隆起部7の追随性が良好となる。 Bonding state of the ridges forming the elastic member 6, and by doing so the formation pattern of the adhesive layers 9 and ridges 7 high enough to fit properly in the excretion portion of the wearer formation It is, also when worn, even during operation of the wearer, followability of the ridges 7 can be improved.
【0024】 [0024]
図1及び図2に示すように、ナプキン1のトップシート1側には、その構成部材の圧密化によって形成された、液体の吸収が可能な防漏溝10が形成されている。 As shown in FIGS. 1 and 2, the topsheet 1 side of the napkin 1, formed by the consolidation of the components thereof, the leakage preventing groove 10 absorbs capable of liquid is formed. 防漏溝10は、略半円状の前方溝10a、ナプキン1の長手方向に沿う中心線の方向に湾曲した形状の中央溝10b、及び細長の楕円形を短径部分で切断した形状の後方溝10cから構成されている。 Bomomizo 10 has a substantially semi-circular front groove 10a, the rear of the shape in the longitudinal direction along the central groove of the shape curved in the direction of the center line 10b, and elongate oval was cut with the short diameter portion of the napkin 1 and a groove 10c. そして、これらの溝が連続して、隆起部7を周囲を全周に亘り取り囲んでおり、閉じた構造となっている。 Then, in succession these grooves, the ridges 7 surrounds over the circumference the entire circumference, and has a closed structure. 本明細書において「隆起部の周囲」とは、隆起部の周りの少なくとも一部分の領域を意味する。 The "periphery of the raised portion" herein is meant at least a portion of the region around the ridges. 隆起部7の周囲に防漏溝10を形成することによって、仮に隆起部7における吸収層4が限界量以上の多量の吸収してしまい、隆起部7の表面を伝って液が流出したとしても、流出した該液は防漏溝10によって確実に吸収される。 Around the ridges 7 by forming the leakage preventing groove 10, if the absorption layer 4 ends up large amounts of absorption of the above limit amount in the ridges 7, even as the liquid flows out along the surface of the raised portion 7 , spilled liquid is reliably absorbed by Bomomizo 10. その結果、液漏れが極めて効果的に防止される。 As a result, liquid leakage is extremely effectively prevented. その上、隆起部7の周囲に防漏溝10を形成することによって、防漏溝10の部分での可撓性がその周りの部分よりも高くなり、ナプキン1が防漏溝10の部分で身体の形に沿うように変形しやすくなる。 Moreover, by forming the leakage preventing grooves 10 around the raised portion 7, the flexible part of Bomomizo 10 is higher than the portion around it, the napkin 1 is in the portion of the leakage preventing groove 10 easily deformed along the shape of the body. その結果、ナプキン1の中央部に位置する隆起部7から両サイド部に亘ってナプキン1が一層身体にフィットしやすくなり、ナプキン1の変形追随性が一層向上する。 As a result, the napkin 1 over the ridges 7 located at the center portion of the napkin 1 on both sides portion is more likely to fit the body, deformation following ability of the napkin 1 is further improved. 従って着用者の動作に対して一層漏れ難い形態となり、隆起部7との相乗効果が得られる。 Thus become more leakage hardly form relative motions of the wearer, the synergistic effect of the raised portion 7 is obtained. 本実施形態のように隆起部7の周囲を全周に亘って取り囲んだ閉じた構造は、漏れ防止の点から一層好ましい。 Closed structure surrounding over around the entire circumference of the raised portion 7 as in the present embodiment, more preferred from the viewpoint of preventing leakage.
【0025】 [0025]
特に、図1に示すように、防漏溝10内に、高圧密化領域11と低圧密化領域12とが互いに交互に形成されていることで、防漏溝10内での液の吸収性能が向上する。 In particular, as shown in FIG. 1, the Bomomizo 10, that the high pressure densification region 11 and the low pressure densification region 12 are formed alternately with each other, the absorption performance of the liquid in Bomomizo 10. There is improved.
【0026】 [0026]
防漏溝10の深さは、吸収層4の厚みにも関係するが、溝の上面部から低面部までの距離が1mm以上、特に2mm〜10mmであることが、隆起部7の表面を伝って流出した液の堰き止め効果の点から好ましい。 The depth of Bomomizo 10 is also related to the thickness of the absorbent layer 4, or distance 1mm from the top surface portion of the groove to the low surface portion, particularly a 2mm~10mm is, along the surface of the raised portion 7 from the viewpoint of the blocking effect of the spilled liquid Te. 同様の理由から、防漏溝10の幅は、1mm以上、特に1.5〜5mmであることが好ましい。 For the same reason, the width of Bomomizo 10, 1 mm or more, particularly preferably 1.5 to 5 mm.
【0027】 [0027]
防漏溝10は、前述の通り、トップシート2、吸収層4、隆起部形成シート5及び隆起部形成弾性部材6を、熱エンボス加工によって一体的に圧密化することで形成される Bomomizo 10, as described above, the top sheet 2, the absorbent layer 4, a raised portion forming sheet 5 and the ridges forming the elastic member 6 is formed by compacting integrally by hot embossing.
【0028】 [0028]
ナプキン1は、その隆起部7の位置における厚みT(図2参照)が、490Pa(5gf/cm 2 )荷重下において5〜20mm であり好ましくは 7〜15mmである(以下、この荷重下での厚みをT 5という)。 Napkin 1 has a thickness T (see FIG. 2) at the position of the ridge 7 is a 5~20mm in 490 Pa (5 gf / cm 2) under a load, preferably Ru 7~15mm der (hereinafter, under the load ) that the thickness T 5 at. 490Pa加重下は、着用者が吸収性物品を装着し立った状態で動きのない時に吸収性物品にかかる荷重に相当し、このときの厚みT 5が前記範囲内となることで、着用者の排泄部に適切にフィットするのに十分な高さの隆起部7が形成される。 490Pa weights under the wearer corresponds to the load applied to the absorbent article in the absence of motion in a standing state wearing the absorbent article, that is the thickness T 5 at this time falls within the range, the wearer ridges 7 of sufficient height is formed to fit properly in the excretion portion.
【0029】 [0029]
またナプキン1は、その隆起部7の位置における厚みが4903Pa(50g/cm 2 )荷重下において3〜10mm であり好ましくは 4〜8mmである(以下、この荷重下での厚みをT 50という)。 The napkin 1 has a thickness at the position of the raised portion 7 is 3~10mm in 4903Pa (50g / cm 2) under a load, preferably Ru 4~8mm der (hereinafter, the thickness of the under this load T 50 that). 4903Pa荷重下は、着用者が座ったり走ったりした時に吸収性物品にかかる荷重に相当し、このときの厚みT 50が前記範囲内となることで、T 5に関し前述した理由と同様に、着用者の排泄部に適切にフィットするのに十分な高さの隆起部7が形成される。 Under 4903Pa load corresponds to a load applied to the absorbent article when running or sitting wearer, when the thickness T 50 at this time falls within the range, similarly to the above-described reason relates T 5, wear properly ridges 7 high enough to fit are formed in the excretion portion of the person.
【0030】 [0030]
更にナプキン1は、T 5とT 50との比、即ち、T 5 /T 50の値が1.5〜4 であり好ましくは 2〜3.5である。 Further napkin 1, the ratio of T 5 and T 50, i.e., the value of T 5 / T 50 is 1.5 to 4, Ru preferably 2-3.5 der. 5 /T 50の値は、ナプキン1の隆起部7における圧縮回復性の尺度になるものであり、T 5 /T 50の値が前記の範囲となることで、着用者の動きに起因する装着圧の変化に対するナプキン1の変形追従性が十分なものとなり、フィット性が十分に高くなる。 The value of T 5 / T 50 is made of a measure of compression recovery property in the ridges 7 of the napkin 1, when a value of T 5 / T 50 is the range of the results from the movement of the wearer deformation followability of the napkin 1 becomes sufficient to changes in mounting pressure, fit is sufficiently high.
【0031】 [0031]
5及びT 50は、ナプキン1の隆起部7の位置において、1cm×1cmの領域を対象として測定される。 T 5 and T 50, in the position of the raised portion 7 of the napkin 1, is measured as a target area of 1 cm × 1 cm.
【0032】 [0032]
本発明は、前記実施形態に制限されない。 The present invention is not limited to the embodiment. 例えば前記実施形態においては、防漏溝10が隆起部7の周囲に全周に亘り形成されているが、これに代えて例えば隆起部7の両側にのみ一対の防漏溝10を形成してもよい(即ち中央溝10bのみを形成してもよい)。 For example, in the above embodiment, although Bomomizo 10 is formed over the entire circumference around the ridges 7, only to form a pair of proof Momizo 10 Alternatively both sides, for example ridges 7 which may (i.e. may only to form a central groove 10b).
【0033】 [0033]
前記実施形態においては、隆起部形成弾性部材6は、その自由状態(弛緩状態)でバックシート3と接合固定されていたが、これに代えて隆起部形成弾性部材6を伸張状態でバックシート3と接合固定してもよい。 In the above embodiment, the raised portion formed elastic member 6, its free state had been joined and fixed with the back sheet 3 in (relaxed state), the back sheet 3 ridges forming the elastic members 6 in a stretched state in place of this and they may be joined and fixed. これによっても隆起部形成弾性部材6の収縮で隆起部形成シート5がトップシート2側に隆起して隆起部7が形成される。 This ridge forming sheet 5 by contraction of the raised portions forming the elastic member 6 ridge 7 and raised to the topsheet 2 side is formed by.
【0034】 [0034]
また、本発明の吸収性物品は、生理用ナプキンの他、おりものシート、失禁パッド等にも同様に適用できる。 Further, the absorbent article of the present invention, other sanitary napkins, textile sheets, equally applicable to incontinence pads.
【0035】 [0035]
【発明の効果】 【Effect of the invention】
本発明によれば、着用者の動きに対し常に排泄部にフィットして液漏れを効果的に防止し得る吸収性物品が提供される。 According to the present invention, the absorbent article is provided which can effectively prevent leakage fit always excretory part to the wearer's movements.
【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS
【図1】本発明の吸収性物品の一実施形態としての生理用ナプキンを、トップシート側から見た平面図である。 The sanitary napkin as an embodiment of an absorbent article of the present invention; FIG is a plan view seen from the top sheet side.
【図2】図1におけるII−II線断面図である。 2 is a sectional view taken along line II-II in FIG. 1.
【図3】本発明に用いられる隆起部形成シートを示す模式図である。 3 is a schematic view showing a ridge formed sheet used in the present invention.
【符号の説明】 DESCRIPTION OF SYMBOLS
1 生理用ナプキン2 トップシート3 バックシート4 吸収層5 隆起部形成シート6 隆起部形成弾性部材7 隆起部10 防漏溝 1 sanitary napkin 2 topsheet 3 backsheet 4-absorbing layer 5 ridges forming sheet 6 ridges forming the elastic member 7 ridge 10 Bomomizo

Claims (1)

  1. 液透過性の表面層、液不透過性の裏面層及び該表面層と該裏面層との間に介在する液保持性の吸収層を有する生理用ナプキンにおいて、 Liquid permeable surface layer, the sanitary napkin having a liquid-retentive absorbent layer interposed between the liquid impermeable back layer and the surface layer and the back surface layer,
    前記吸収層と前記裏面層との間に折曲回復性を有する隆起部形成シートが配されており、該隆起部形成シートの両側部が、幅方向に伸張された状態の隆起部形成弾性部材にそれぞれ固定され、該隆起部形成弾性部材の収縮状態において前記隆起部形成シートが前記表面層側に隆起して前記生理用ナプキンの幅方向略中央部に凸状の隆起部が形成されており、 Ridge forming sheet have been provided, both sides of the raised portion forming sheet, ridge formation elastic member in a state of being stretched in the width direction having a folding recovery between the back layer and the absorbent layer in respectively fixed, are該隆convex ridges the ridge forming sheet is raised to the surface layer side in the width direction substantially central portion of the sanitary napkin in the contracted state of the raised portion forming the elastic member is formed ,
    前記隆起部形成シートには、折曲のための可撓軸が該隆起部形成シートの長手方向に沿って複数形成されており、 Wherein the raised portion forming sheet, formed with a plurality flexible shaft along the longitudinal direction of the raised portion forming sheet for folding,
    前記隆起部形成シートが、熱可塑性樹脂からなる不織布又は発泡体から構成されている同種又は異種の二枚のシートを含み、折曲のための前記可撓軸が該隆起部形成シートの長手方向に沿って複数形成されるようにエンボス加工が施され、 前記二枚のシートが多数の密着部によって接合されて前記可撓軸が形成されていると共に該密着部の間に両者が離間した非密着部が存しており、 前記隆起部形成シートの坪量が30〜500g/cm 2 であり、 Wherein the raised portion forming sheet comprises a homogenous or two sheets of different and a Do that nonwoven fabric or foam of a thermoplastic resin, wherein the flexible shaft has the raised portion forming sheet for folding embossing is performed so as to form a plurality in the longitudinal direction, is both between said seal attaching portion together with the flexible shaft said two sheets are joined by a number of contact portions are formed non-contacted portion spaced has been the presence, the basis weight of the raised portion forming sheet is 30 to 500 g / cm 2,
    また、前記隆起部の周囲に、前記表面層、前記吸収層、前記隆起部形成シート及び前記隆起部形成弾性部材が一体的に圧密化されて液の吸収が可能な閉じた構造の防漏溝が形成されており、 Further, the periphery of the raised portion, the surface layer, the absorbent layer, wherein the raised portion forming sheet and the raised portions forming the elastic member is integrally compacted by absorbed is closed structure capable of liquid Bomomizo There are formed,
    閉じた構造の前記防漏溝は、略半円状の前方溝と、生理用ナプキンの長手方向に沿う中心線の方向に湾曲した形状の中央溝と、細長の楕円形を短径部分で切断した形状の後方溝とから構成されており、 The anti Momizo closed structure, cutting a semicircular front groove, and a central groove having a shape curved in the direction of the center line along the longitudinal direction of the sanitary napkin, elongated oval in the short diameter portion It is composed of the rear groove of the shape,
    前記隆起部の位置における厚みTが、490Pa荷重下において5〜20mmで且つ4903Pa荷重下において3〜10mmであり、490Pa荷重下における厚みと4903Pa荷重下における厚みとの比(前者/後者)が1.5〜4である生理用ナプキン The thickness T at the position of the raised portion is a 3~10mm in and 4903Pa under load in 5~20mm under 490Pa load, the ratio of the thickness under thickness and 4903Pa load under 490Pa load (former / latter) is 1 sanitary napkins is .5~4.
JP2000015941A 2000-01-25 2000-01-25 Sanitary napkins Expired - Fee Related JP4392936B2 (en)

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