JP6276215B2 - Pants-type disposable diaper - Google Patents
Pants-type disposable diaper Download PDFInfo
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- JP6276215B2 JP6276215B2 JP2015068069A JP2015068069A JP6276215B2 JP 6276215 B2 JP6276215 B2 JP 6276215B2 JP 2015068069 A JP2015068069 A JP 2015068069A JP 2015068069 A JP2015068069 A JP 2015068069A JP 6276215 B2 JP6276215 B2 JP 6276215B2
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Landscapes
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Description
本発明は、パンツタイプ使い捨ておむつに関するものである。 The present invention relates to a pants-type disposable diaper.
パンツタイプ使い捨ておむつは、前身頃及び後身頃を個別又は一体的に構成する外装体と、前身頃から後身頃にわたるように外装体の内面に取り付けられた、吸収体を含む内装体とを備え、前身頃の外装体の両側縁部と後身頃の外装体の両側縁部とが接合されてサイドシール部が形成されることにより、ウエスト開口及び左右一対の脚開口が形成されているものが一般的である。 The pants-type disposable diaper includes an exterior body that individually or integrally configures the front body and the back body, and an interior body including an absorbent body that is attached to the inner surface of the exterior body so as to extend from the front body to the back body. Generally, a waist opening and a pair of left and right leg openings are formed by joining the side edges of the outer body of the front body and the side edges of the outer body of the rear body to form a side seal part. Is.
パンツタイプ使い捨ておむつの外装体には、サイドシール部を有する前後方向範囲（ウエスト開口から脚開口の上端に至る前後方向範囲）として定まる胴周り領域等に、糸ゴム等の弾性部材を設けて伸縮性を付加することが一般的となっており（例えば、特許文献１、２参照）、そのための弾性部材としては、従来、糸ゴム等の細長状弾性伸縮部材を長手方向に伸長した状態で多数並べて固定する手法が広く採用されているが、面的なフィット性に優れるものとして、弾性フィルムを伸縮性の付与方向に伸長した状態で取り付ける手法も提案されている。（例えば特許文献３参照）。 The outer body of the pants-type disposable diaper is provided with elastic members such as rubber thread in the waist area that is defined as the front-rear direction range (the front-rear direction range from the waist opening to the upper end of the leg opening) with side seals. (For example, refer to Patent Documents 1 and 2). As an elastic member for that purpose, a number of conventional elastic members such as rubber thread are elongated in the longitudinal direction. Although the method of fixing in a line is widely adopted, as an excellent surface fitting property, a method of attaching an elastic film in a stretched direction in a stretchable direction has also been proposed. (For example, refer to Patent Document 3).
この弾性フィルムをシート層で挟んだ伸縮構造（以下、弾性フィルム伸縮構造ともいう）は、伸縮領域が不織布からなる第１シート層と、不織布からなる第２シート層との間に弾性フィルムが積層されてなるとともに、弾性フィルムがそれらの表面に沿う伸縮方向に伸長された状態で、第１シート層及び第２シート層が、伸縮方向及びこれと直交する方向にそれぞれ間隔を空けて配列された多数の接合部で、弾性フィルムに形成された貫通孔を通じて接合されてなるものである。このような弾性フィルム伸縮構造は、自然長状態では、接合部間において弾性フィルムが収縮するのに伴い、接合部の間隔が狭くなり、第１シート層及び第２シート層における接合部間に伸縮方向と交差する方向に延びる収縮皺が形成される。反対に伸長時には、接合部間において弾性フィルムが伸長するのに伴い、接合部の間隔及び第１シート層及び第２シート層における収縮皺が広がり、第１シート層及び第２シート層の完全展開状態まで弾性伸長が可能となる。この弾性フィルム伸縮構造は、面的なフィット性に優れるのはもちろん、第１シート層及び第２シート層と弾性フィルムとの接合が無く、かつ第１シート層及び第２シート層の接合も極めて少ないため非常に柔軟であり、また、弾性フィルムの貫通孔が通気性向上にも寄与するという利点がある。 An elastic structure in which this elastic film is sandwiched between sheet layers (hereinafter also referred to as an elastic film elastic structure) is formed by laminating an elastic film between a first sheet layer whose elastic region is made of a nonwoven fabric and a second sheet layer made of a nonwoven fabric. In addition, the first sheet layer and the second sheet layer are arranged at intervals in the stretch direction and the direction orthogonal thereto, with the elastic film being stretched in the stretch direction along the surface thereof. A large number of joints are joined through through holes formed in the elastic film. In such an elastic film stretchable structure, in the natural length state, as the elastic film contracts between the joints, the interval between the joints becomes narrower, and the stretches between the joints in the first sheet layer and the second sheet layer. A contraction fold is formed that extends in a direction that intersects the direction. On the other hand, when the elastic film is stretched between the joints when stretched, the spacing between the joints and the shrinkage wrinkles in the first sheet layer and the second sheet layer are widened, and the first sheet layer and the second sheet layer are completely developed. Elastic extension to the state becomes possible. This elastic film stretchable structure is excellent in surface fit, and there is no bonding between the first sheet layer and the second sheet layer and the elastic film, and the first sheet layer and the second sheet layer are extremely bonded. Since there are few, it is very flexible, and there exists an advantage that the through-hole of an elastic film contributes also to air permeability improvement.
パンツタイプ使い捨ておむつにおいて、外装体に弾性フィルム伸縮構造を採用する場合、構造の簡素化及び資材コストの抑制のためには、同一の弾性フィルムによりできるだけ広範囲に伸縮領域を形成することが望まれる。 In a pants-type disposable diaper, when an elastic film stretchable structure is adopted for the exterior body, it is desired to form a stretchable region as widely as possible with the same elastic film in order to simplify the structure and suppress material costs.
しかし、弾性フィルム伸縮構造は、通常では伸縮方向と直交する方向に締め付け力を変化させることができない。また、弾性フィルム伸縮構造は、柔軟性を確保するために弾性フィルムを薄くすると弾性フィルムが弱くなるため、どちらかといえば締め付け力を強く発揮させるのに不向きな構造である。 However, the elastic film stretchable structure usually cannot change the tightening force in a direction orthogonal to the stretchable direction. The elastic film stretchable structure is unsuitable for exerting a strong tightening force because the elastic film becomes weak when the elastic film is thinned to ensure flexibility.
したがって、ウエスト部や脚周り部のように比較的に強い締め付け力が望まれる開口の縁部分と、それに続く部分とにわたり、同一の弾性フィルムによる伸縮構造を設けることは困難であった。 Therefore, it has been difficult to provide a stretchable structure using the same elastic film over the edge portion of the opening where a relatively strong tightening force is desired, such as the waist portion and the leg periphery portion, and the subsequent portion.
そこで、本発明の主たる課題は、開口の縁部分及びそれに続く部分が同一の弾性フィルムによる伸縮構造でありながら、開口の縁部分をより強く締め付けることができるパンツタイプ使い捨ておむつを提供することにある。 Then, the main subject of this invention is providing the underpants type disposable diaper which can clamp | tighten the edge part of an opening more strongly, while the edge part of an opening and the subsequent part are the expansion-contraction structure by the same elastic film. .
上記課題を解決した本発明は次記のとおりである。
＜請求項１記載の発明＞
腹側外装部分及び背側外装部分を有し、前記腹側外装部分の側縁部と前記背側外装部分の側縁部とが幅方向両側で接合されてウエスト開口が形成された、外装体と、
前側の部分が前記腹側外装体の幅方向中央領域に、及び後側の部分が前記背側外装体の幅方向中央領域にそれぞれ接合され、装着者の股間を通るように設けられた内装体と、を備え、
前記外装体における前記内装体の幅方向両側に位置する部分の縁により、脚開口の縁の少なくとも一部が形成された、パンツタイプ使い捨ておむつにおいて、
前記腹側外装部分及び背側外装部分の少なくとも一方の外装部分は、
前記ウエスト開口及び脚開口の少なくとも一方の開口の縁部分からそれに続く部分にかけて、第１シート層と第２シート層との間に弾性フィルムが積層された基本積層部分と、
前記開口の縁部分に設けられた、前記基本積層部分から連続する弾性フィルム並びに前記第１シート層及び第２シート層の少なくとも一方のシート層が、前記開口の縁で当該一方のシート層と反対側に折り返された折り返し積層部分とを有しており、
前記基本積層部分及び折り返し積層部分では、前記弾性フィルムが少なくとも幅方向に伸長された状態で、前記第１シート層及び第２シート層が、幅方向及び前後方向にそれぞれ間隔を空けて配列された多数の接合部で接合されており、
前記折り返し積層部分における前記接合部の面積率が、幅方向中間から幅方向両側に向かうにつれて段階的又は連続的に高くなるように構成されている、
ことを特徴とするパンツタイプ使い捨ておむつ。
The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
An exterior body having a ventral exterior part and a back exterior part, wherein a side edge of the abdominal exterior part and a side edge of the back exterior part are joined on both sides in the width direction to form a waist opening. When,
The interior body provided such that the front portion is joined to the center region in the width direction of the abdominal exterior body and the rear portion is joined to the center region in the width direction of the back exterior body, and passes through the crotch of the wearer. And comprising
In the pants-type disposable diaper in which at least part of the edge of the leg opening is formed by the edge of the portion located on both sides in the width direction of the interior body in the exterior body,
At least one exterior part of the ventral exterior part and the back exterior part is
A basic laminated portion in which an elastic film is laminated between the first sheet layer and the second sheet layer from the edge portion of at least one of the waist opening and the leg opening to the subsequent portion;
The elastic film that is provided at the edge portion of the opening and that is continuous with the basic laminated portion, and at least one of the first sheet layer and the second sheet layer is opposite to the one sheet layer at the edge of the opening. A folded laminated portion folded back to the side,
In the basic laminated portion and the folded laminated portion, the first sheet layer and the second sheet layer are arranged at intervals in the width direction and the front-rear direction with the elastic film stretched at least in the width direction. It is joined at many joints ,
The area ratio of the joint in the folded laminated portion is configured to increase stepwise or continuously from the middle in the width direction toward both sides in the width direction .
A pants-type disposable diaper characterized by that.
（作用効果）
本発明では、折り返し積層部分を設けることにより、ウエスト開口及び脚開口の少なくとも一方の開口の縁部分では弾性フィルムが二層となり、それに続く部分では単層となるため、開口の縁部分及びそれに続く部分が同一の弾性フィルムによる伸縮構造でありながら、開口の縁部分をより強く締め付けることができるようになる。よって、弾性フィルムのみでパンツタイプ使い捨ておむつに好ましいフィット性を作り出すことができる。また、本発明では開口の縁がシート層の折り返しにより形成されるため、第１シート層及び第２シート層が開いて見栄えや装着感を悪化させることがない、という利点ももたらされる。
また、本発明のような弾性フィルム伸縮構造では、基本的に、接合部の面積率が高くなるほど第１シート層及び第２シート層が弾性フィルムにより収縮する部分が少なくなり、弾性限界伸びも低下する。よって、脚開口の縁部分の折り返し積層部分における接合部の面積率が、幅方向中間から幅方向両側に向かうにつれて段階的又は連続的に高くなるように構成されていると、ウエストや脚周りのフィット性を向上させることができる。
ここで、「弾性限界伸び」とは、弾性限界（換言すれば第１シート層及び第２シート層が完全に展開した状態）における伸びを意味し、弾性限界時の長さを自然長を１００％としたときの百分率で表すものであり、「面積率」とは単位面積に占める対象部分の割合を意味し、対象領域（例えば伸縮領域）における対象部分（例えば接合部）の総面積を当該対象領域の面積で除して百分率で表すものであり、特に「接合部の面積率」とは、伸縮方向に弾性限界まで伸ばした状態の面積率を意味するものである。
(Function and effect)
In the present invention, by providing the folded laminated portion, the elastic film has two layers at the edge portion of at least one of the waist opening and the leg opening, and the subsequent film becomes a single layer. The edge portion of the opening can be tightened more strongly while the portion is a stretchable structure made of the same elastic film. Therefore, a favorable fit for a pants-type disposable diaper can be created with only an elastic film. Further, in the present invention, since the edge of the opening is formed by folding the sheet layer, there is also an advantage that the first sheet layer and the second sheet layer are not opened and the appearance and wearing feeling are not deteriorated.
Further, in the elastic film stretchable structure as in the present invention, basically, the higher the area ratio of the joint portion, the smaller the portion where the first sheet layer and the second sheet layer shrink due to the elastic film, and the elastic limit elongation also decreases. To do. Therefore, when the area ratio of the joint in the folded laminated portion of the edge portion of the leg opening is configured to increase stepwise or continuously from the middle in the width direction to both sides in the width direction, Fit property can be improved.
Here, the “elastic limit elongation” means the elongation at the elastic limit (in other words, the state where the first sheet layer and the second sheet layer are completely expanded), and the length at the elastic limit is the natural length of 100. % Represents the percentage of the target portion in the unit area, and the total area of the target portion (for example, the joint) in the target region (for example, the stretchable region) It is expressed as a percentage divided by the area of the target region. In particular, the “area ratio of the joint portion” means an area ratio in a state of being extended to the elastic limit in the expansion / contraction direction.
＜請求項２記載の発明＞
前記外装体は、前記腹側外装部分をなす腹側外装体の両側部と前記背側外装部分をなす背側外装体の両側部とが接合されたものであり、前記腹側外装体と前記背側外装体とが股間側で連続せずに離間されている、請求項１記載のパンツタイプ使い捨ておむつ。
<Invention of Claim 2>
The exterior body is formed by joining both sides of the abdominal exterior body constituting the abdominal exterior part and both sides of the back side exterior body constituting the back side exterior part. The pants-type disposable diaper according to claim 1, wherein the back-side exterior body is spaced apart from the crotch side without being continuous.
（作用効果）
このような外装二分割タイプのものは、外装部分に折り返し積層部分を形成しやすいため好ましい。
(Function and effect)
Such an exterior two-part type is preferable because it is easy to form a folded laminated portion in the exterior portion.
＜請求項３記載の発明＞
前記折り返し積層部分では、前記基本積層部分で弾性フィルムの内側に位置するシート層が前記弾性フィルムとともに基本積層部分の外側に折り返されている、請求項１又は２記載のパンツタイプ使い捨ておむつ。
<Invention of Claim 3>
The pants-type disposable diaper according to claim 1 or 2, wherein in the folded laminated portion, a sheet layer located inside the elastic film in the basic laminated portion is folded outside the basic laminated portion together with the elastic film.
（作用効果）
折り返し積層部分の折り返し側は適宜定めることができるが、基本積層部分の外側に折り返すと、強く締め付ける部分の内面に凹凸が生じないため、装着感が良好となる。
(Function and effect)
The folding side of the folded laminated portion can be determined as appropriate. However, when folded back to the outside of the basic laminated portion, the inner surface of the strongly tightened portion does not have unevenness, so that the feeling of wearing is good.
以上のとおり、本発明によれば、開口の縁部分及びそれに続く部分が同一の弾性フィルムによる伸縮構造でありながら、開口の縁部分をより強く締め付けることができるパンツタイプ使い捨ておむつとなる、等の利点がもたらされる。 As described above, according to the present invention, the edge portion of the opening and the subsequent portion are stretchable structures made of the same elastic film, but the pants-type disposable diaper can tighten the edge portion of the opening more strongly, etc. Benefits are provided.
以下、本発明の一実施形態について、添付図面を参照しつつ詳説する。なお、断面図中の点模様部分はホットメルト接着剤を示しているが、対象部材の溶着により接合を行う溶着手段を用いることもできる。ホットメルト接着剤は、ベタ、ビード、カーテン、サミット若しくはスパイラル等のパターンで塗布する他、弾性伸縮部材の固定部分はこれに代えて又はこれとともにコームガンやシュアラップ塗布などの弾性伸縮部材の外周面への塗布を採用することもできる。 Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, although the dot pattern part in sectional drawing has shown the hot-melt-adhesive, the welding means which joins by welding of an object member can also be used. Hot melt adhesive is applied in a pattern such as solid, bead, curtain, summit or spiral, and the fixed part of the elastic elastic member is used instead of or together with the outer peripheral surface of the elastic elastic member such as comb gun or sure wrap application. Application to can also be employed.
図１〜図７はパンツタイプ使い捨ておむつを示している。このパンツタイプ使い捨ておむつ（以下、単におむつともいう。）は、腹側外装体２６の幅方向両側の側縁部と背側外装体２７の幅方向両側の側縁部とが、縦方向に沿ってヒートシールや超音波溶着等により接合されて筒状の外装体２６，２７が形成されるとともに、外装体２６，２７における腹側外装体２６の幅方向中央部内面に内装体２００の前端部が、及び背側外装体２７の幅方向中央部内面に内装体２００の後端部が、それぞれホットメルト接着剤等により連結されている。符号１２Ａは腹側外装体２６と背側外装体２７との接合部（サイドシール部）を示している。 1 to 7 show a pants-type disposable diaper. In this pants-type disposable diaper (hereinafter, also simply referred to as a diaper), side edges on both sides in the width direction of the abdominal exterior body 26 and side edges on both sides in the width direction of the back side exterior body 27 are along the vertical direction. The cylindrical outer bodies 26 and 27 are formed by heat sealing, ultrasonic welding, and the like, and the front end portion of the inner body 200 is formed on the inner surface in the center in the width direction of the ventral side outer body 26 of the outer bodies 26 and 27. However, the rear end portion of the interior body 200 is connected to the inner surface of the central portion in the width direction of the backside exterior body 27 by a hot melt adhesive or the like. Reference numeral 12 </ b> A denotes a joint portion (side seal portion) between the ventral-side exterior body 26 and the back-side exterior body 27.
（内装体の構造例）
内装体１０は、図４〜図６に示すように、不織布などからなる液透過性表面シート１１と、ポリエチレン等からなる液不透過性裏面側シート１２との間に、吸収体１３を介在させた構造を有しており、表面シート１１を透過した排泄液を吸収保持するものである。内装体１０の平面形状は特に限定されないが、図示形態のように略長方形とすることが一般的である。
(Structural example of interior body)
As shown in FIGS. 4 to 6, the interior body 10 has an absorbent body 13 interposed between a liquid-permeable top sheet 11 made of a nonwoven fabric or the like and a liquid-impermeable back side sheet 12 made of polyethylene or the like. The excretory fluid that has permeated through the top sheet 11 is absorbed and retained. Although the planar shape of the interior body 10 is not particularly limited, it is generally a substantially rectangular shape as illustrated.
吸収体１３の表面側（肌当接面側）を覆う液透過性表面シート１１としては、有孔又は無孔の不織布や多孔性プラスチックシートなどが好適に用いられる。不織布を構成する素材繊維は、ポリエチレン又はポリプロピレン等のオレフィン系、ポリエステル系、ポリアミド系等の合成繊維の他、レーヨンやキュプラ等の再生繊維、綿等の天然繊維とすることができ、スパンレース法、スパンボンド法、サーマルボンド法、メルトブローン法、ニードルパンチ法等の適宜の加工法によって得られた不織布を用いることができる。これらの加工法の内、スパンレース法は柔軟性、ドレープ性に富む点で優れ、サーマルボンド法は嵩高でソフトである点で優れている。液透過性表面シート１１に多数の透孔を形成した場合には、尿などが速やかに吸収されるようになり、ドライタッチ性に優れたものとなる。液透過性表面シート１１は、吸収体１３の側縁部を巻き込んで吸収体１３の裏面側まで延在している。 As the liquid-permeable surface sheet 11 covering the surface side (skin contact surface side) of the absorbent body 13, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. The material fibers that make up the nonwoven fabric can be synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or polyamide, recycled fibers such as rayon or cupra, natural fibers such as cotton, and the spunlace method. A nonwoven fabric obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. When a large number of through holes are formed in the liquid permeable surface sheet 11, urine and the like are quickly absorbed, and the dry touch property is excellent. The liquid permeable top sheet 11 is wound around the side edge of the absorber 13 and extends to the back side of the absorber 13.
吸収体１３の裏面側（非肌当接面側）を覆う液不透過性裏面側シート１２は、ポリエチレン又はポリプロピレンなどの液不透過性プラスチックシートが用いられるが、近年はムレ防止の点から透湿性を有するものが好適に用いられる。この遮水・透湿性シートは、例えばポリエチレンやポリプロピレン等のオレフィン樹脂中に無機充填材を溶融混練してシートを形成した後、一軸又は二軸方向に延伸することにより得られる微多孔性シートである。 As the liquid-impermeable back sheet 12 that covers the back surface side (non-skin contact surface side) of the absorbent body 13, a liquid-impermeable plastic sheet such as polyethylene or polypropylene is used. Those having wettability are preferably used. This water-impervious and moisture-permeable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. is there.
吸収体１３としては、公知のもの、例えばパルプ繊維の積繊体、セルロースアセテート等のフィラメントの集合体、あるいは不織布を基本とし、必要に応じて高吸収性ポリマーを混合、固着等してなるものを用いることができる。この吸収体１３は、形状及びポリマー保持等のため、必要に応じてクレープ紙等の、液透過性及び液保持性を有する包装シート１４によって包装することができる。 Absorbent body 13 is a known material, for example, a pulp fiber stack, a collection of filaments such as cellulose acetate, or a non-woven fabric, mixed with a superabsorbent polymer as necessary, fixed, etc. Can be used. The absorbent body 13 can be packaged with a wrapping sheet 14 having liquid permeability and liquid retention, such as crepe paper, if necessary, for holding the shape and polymer.
吸収体１３の形状は、股間部に前後両側よりも幅の狭い括れ部分１３Ｎを有する略砂時計状に形成されているが、長方形状等、適宜の任意形状とすることができる。括れ部分１３Ｎの寸法は適宜定めることができるが、括れ部分１３Ｎの前後方向長さはおむつ全長の２０〜５０％程度とすることができ、その最も狭い部分の幅は吸収体１３の全幅の４０〜６０％程度とすることができる。このような括れ部分１３Ｎを有する場合において、内装体１０の平面形状が略長方形とされていると、内装体１０における吸収体１３の括れ部分１３Ｎと対応する部分に、吸収体１３を有しない余り部分が形成される。 The shape of the absorber 13 is formed in a substantially hourglass shape having a narrowed portion 13N having a narrower width than the front and rear sides at the crotch portion, but may be any suitable shape such as a rectangular shape. Although the size of the constricted portion 13N can be determined as appropriate, the length in the front-rear direction of the constricted portion 13N can be about 20 to 50% of the total length of the diaper, and the width of the narrowest portion is 40% of the total width of the absorber 13. It can be about -60%. In the case where the constricted portion 13N is provided, if the planar shape of the interior body 10 is substantially rectangular, the remainder of the interior body 10 that does not include the absorber 13 in the portion corresponding to the constricted portion 13N of the absorber 13. A part is formed.
内装体１０の両側部には脚周りにフィットする立体ギャザーＢＳが形成されている。この立体ギャザーＢＳは、図５及び図６に示されるように、内装体の裏面の側部に固定された固定部と、この固定部から内装体の側方を経て内装体の表面の側部まで延在するギャザー本体部と、ギャザー本体部における前後端部が倒伏状態で内装体の表面の側部に固定されて形成された倒伏部分と、ギャザー本体部における倒伏部分間が非固定とされて形成された自由部分とが、折返しによって二重シートとしたギャザー不織布１５により形成されている。 A solid gather BS that fits around the legs is formed on both sides of the interior body 10. As shown in FIGS. 5 and 6, the three-dimensional gather BS includes a fixed portion fixed to a side portion on the back surface of the interior body, and a side portion on the surface of the interior body from the fixed portion to the side of the interior body. The gather body part extending to the front, the front and rear ends of the gather body part in a lying state are fixed to the side of the surface of the interior body, and the inside of the gathering part is not fixed. The free part formed in this way is formed of a gathered nonwoven fabric 15 that is turned into a double sheet by folding.
また、二重シート間には、自由部分の先端部等に細長状ギャザー弾性部材１６が配設されている。ギャザー弾性部材１６は、製品状態において図５に二点鎖線で示すように、弾性伸縮力により自由部分を起立させて立体ギャザーＢＳを形成するためのものである。 Further, between the double sheets, an elongated gather elastic member 16 is disposed at the tip of the free part. The gather elastic member 16 is for forming a three-dimensional gather BS by raising a free part by elastic stretching force as shown by a two-dot chain line in FIG. 5 in the product state.
液不透過性裏面側シート１２は、液透過性表面シート１１とともに吸収体１３の幅方向両側で裏側に折り返されている。この液不透過性裏面側シート１２としては、排便や尿などの褐色が出ないように不透明のものを用いるのが望ましい。不透明化としては、プラスチック中に、炭酸カルシウム、酸化チタン、酸化亜鉛、ホワイトカーボン、クレイ、タルク、硫酸バリウムなどの顔料や充填材を内添してフィルム化したものが好適に使用される。 The liquid-impermeable back sheet 12 is folded back on the both sides in the width direction of the absorber 13 together with the liquid-permeable surface sheet 11. As the liquid-impermeable back side sheet 12, it is desirable to use an opaque sheet so that brown such as defecation and urine does not appear. As the opacification, a plastic film and a pigment and filler such as calcium carbonate, titanium oxide, zinc oxide, white carbon, clay, talc and barium sulfate are preferably used.
ギャザー弾性部材１６としては、通常使用されるスチレン系ゴム、オレフィン系ゴム、ウレタン系ゴム、エステル系ゴム、ポリウレタン、ポリエチレン、ポリスチレン、スチレンブタジエン、シリコーン、ポリエステル等の素材を用いることができる。また、外側から見え難くするため、太さは９２５ｄｔｅｘ以下、テンションは１５０〜３５０％、間隔は７．０ｍｍ以下として配設するのがよい。なお、ギャザー弾性部材１６としては、図示形態のような糸状の他、ある程度の幅を有するテープ状のものを用いることもできる。 The gathers elastic member 16, it is possible to use styrene-based rubber, olefin-based rubber generally used, urethane rubber, ester-based rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone over emissions, materials such as polyester. In order to make it difficult to see from the outside, it is preferable that the thickness is 925 dtex or less, the tension is 150 to 350%, and the interval is 7.0 mm or less. The gathered elastic member 16 may be a tape-like member having a certain width in addition to the thread-like shape shown in the figure.
前述のギャザー不織布１５を構成する素材繊維も液透過性表面シート１１と同様に、ポリエチレン又はポリプロピレン等のオレフィン系、ポリエステル系、アミド系等の合成繊維の他、レーヨンやキュプラ等の再生繊維、綿等の天然繊維とすることができ、スパンボンド法、サーマルボンド法、メルトブローン法、ニードルパンチ法等の適宜の加工方法に得られた不織布を用いることができるが、特にはムレを防止するために坪量を抑えて通気性に優れた不織布を用いるのがよい。さらにギャザー不織布１５については、尿などの透過を防止するとともに、カブレを防止しかつ肌への感触性（ドライ感）を高めるために、シリコーン系、パラフィン金属系、アルキルクロミッククロライド系撥水剤などをコーティングした撥水処理不織布を用いるのが望ましい。 In the same manner as the liquid-permeable surface sheet 11, the material fiber constituting the gathered nonwoven fabric 15 is made of synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or amide, recycled fibers such as rayon or cupra, and cotton. Non-woven fabric obtained by an appropriate processing method such as a spunbond method, a thermal bond method, a melt blown method, a needle punch method, etc. can be used. It is preferable to use a nonwoven fabric that suppresses the basis weight and has excellent air permeability. Furthermore the gather nonwoven 15 has a function of preventing permeation such as urine, in order to enhance the feel of the preventing and skin rash (dry feeling), silicone chromatography emission system, paraffin metallic, alkyl chromic chloride overrided system It is desirable to use a water repellent nonwoven fabric coated with a water repellent or the like.
（外装体の構造例）
外装体２６，２７の上部開口は、装着者の胴を通すウエスト開口となり、内装体２００の幅方向両側において外装体２６，２７の下縁及び内装体２００の側縁によりそれぞれ囲まれる部分が脚を通す脚開口となる。外装体２６，２７の各溶着部１２Ａを剥がして展開した状態では、図１及び図２に示すように前後方向中間が括れた形状をなす。外装体２６，２７は内装体２００を装着者に対して支持する部分である。
(External body structure example)
The upper openings of the exterior bodies 26 and 27 become waist openings through which the wearer's torso passes, and the portions surrounded by the lower edges of the exterior bodies 26 and 27 and the side edges of the interior body 200 on both sides in the width direction of the interior body 200 are legs. It becomes a leg opening to let through. In a state where the welded portions 12A of the exterior bodies 26 and 27 are peeled off and expanded, the intermediate shape in the front-rear direction is constricted as shown in FIGS. The exterior bodies 26 and 27 are parts that support the interior body 200 with respect to the wearer.
外装体２６，２７は、腹側外装体２６及び背側外装体２７からなり、腹側外装体２６及び背側外装体２７は脚側で連続しておらず、前後方向に離間されている。この前後方向の離間距離Ｌは特に限定されないが、おむつ全長Ｙの１０〜６０％程度とすることができる。この場合、内装体１０における液不透過性裏面側シート１２の裏面には、内装体１０の裏面全体を覆うように、あるいは腹側外装体２６と背側外装体２７との間に露出する部分全体を覆うように、股間部外装体２２を固定することが望ましいが、股間部外装体２２は省略することもできる。股間部外装体２２としては、後述する第１シート層２０Ａ及び第２シート層２０Ｂと同様の素材を用いることができる。 The exterior bodies 26 and 27 are composed of an abdominal exterior body 26 and a back exterior body 27, and the abdominal exterior body 26 and the back exterior body 27 are not continuous on the leg side and are separated in the front-rear direction. The distance L in the front-rear direction is not particularly limited, but can be about 10 to 60% of the total length Y of the diaper. In this case, on the back surface of the liquid-impermeable back sheet 12 in the interior body 10, a portion exposed to cover the entire back surface of the interior body 10 or between the abdominal exterior body 26 and the back exterior body 27. Although it is desirable to fix the crotch outer body 22 so as to cover the whole, the crotch outer body 22 may be omitted. As the crotch outer body 22, the same material as the first sheet layer 20A and the second sheet layer 20B described later can be used.
また、外装体２６，２７には、図４〜図６にも示されるように、ウエスト開口の縁部分であるウエスト部２３には、幅方向に沿う細長状弾性部材２４が配されるとともに、ウエスト部２３より前後方向中央側の領域には弾性フィルム３０が配設されて、幅方向の伸縮性が付与されている。なお、通常、胴周り領域Ｔ内に幅方向伸縮応力が変化する境界（例えば弾性伸縮部材の太さや伸長率が変化する）を有する場合は、最もウエスト開口側の境界よりもウエスト開口側がウエスト部２３となり、このような境界が無い場合は吸収体５６又は内装体１０よりもウエスト開口側がウエスト部２３となる。 In addition, as shown in FIGS. 4 to 6, in the exterior bodies 26 and 27, an elongated elastic member 24 along the width direction is disposed on the waist portion 23 that is an edge portion of the waist opening, An elastic film 30 is disposed in a region on the center side in the front-rear direction from the waist portion 23, and is provided with stretchability in the width direction. In addition, normally, when there is a boundary (for example, the thickness or elongation rate of the elastic elastic member changes) in the waistline region T, the waist opening side is closer to the waist part than the boundary on the waist opening side. 23, and when there is no such boundary, the waist opening side becomes the waist portion 23 from the absorbent body 56 or the interior body 10.
より詳細に説明すると、ウエスト部弾性部材２４は、外装体２６，２７のウエスト部２３における第１シート層２０Ａ及び第２シート層２０Ｂの間に、前後方向に間隔をおいて配置された複数の糸ゴム等の細長状弾性部材であり、身体の胴周りを締め付けるように伸縮力を与えるものである。ウエスト部弾性部材２４は、間隔を密にして実質的に一束として配置されるのではなく、所定の伸縮ゾーンを形成するように３〜８ｍｍ程度の間隔を空けて、３本以上、好ましくは５本以上配置される。ウエスト部弾性部材２４の固定時の伸長率は適宜定めることができるが、通常の成人用の場合２３０〜３２０％程度とすることができる。 If it demonstrates in detail, the waist part elastic member 24 will be arranged between the 1st sheet layer 20A in the waist part 23 of the exterior bodies 26 and 27, and the 2nd sheet layer 20B at intervals in the front-back direction. It is an elongated elastic member such as a rubber thread, and gives an expansion / contraction force so as to tighten around the body torso. The waist elastic members 24 are not arranged substantially as a single bundle with a close interval, but with a spacing of about 3 to 8 mm so as to form a predetermined stretch zone, preferably three or more, preferably Five or more are arranged. The stretch rate at the time of fixing the waist elastic member 24 can be determined as appropriate, but can be about 230 to 320% in the case of a normal adult.
ウエスト部弾性部材２４は、図示例では糸ゴムを用いたが、例えばテープ状の伸縮部材を用いても良く、またこれに代えて、後述の弾性フィルムをウエスト部２３まで延在させてもよい。図示形態のウエスト部弾性部材２４は、第２シート層２０Ｂの構成材をウエスト開口縁で内面側に折り返してなる折り返し部分２０Ｃに挟持されているが、第１シート層２０Ａの構成材と第２シート層２０Ｂの構成材との間に挟持しても良い。 In the illustrated example, the rubber elastic member 24 is made of rubber thread. However, for example, a tape-like elastic member may be used. Alternatively, an elastic film described later may be extended to the waist 23. . The waist elastic member 24 in the illustrated form is sandwiched between folded portions 20C formed by folding the constituent material of the second sheet layer 20B to the inner surface side at the waist opening edge. You may pinch | interpose between the structural materials of the sheet | seat layer 20B.
第１シート層２０Ａ及び第２シート層２０Ｂの構成材は、シート状のものであれば特に限定無く使用できるが、通気性及び柔軟性の観点から不織布を用いることが好ましい。不織布は、その原料繊維が何であるかは特に限定されない。例えば、ポリエチレンやポリプロピレン等のオレフィン系、ポリエステル系、ポリアミド系等の合成繊維、レーヨンやキュプラ等の再生繊維、綿等の天然繊維などや、これらから二種以上が使用された混合繊維、複合繊維などを例示することができる。さらに、不織布は、どのような加工によって製造されたものであってもよい。加工方法としては、公知の方法、例えば、スパンレース法、スパンボンド法、サーマルボンド法、メルトブローン法、ニードルパンチ法、エアスルー法、ポイントボンド法等を例示することができる。不織布を用いる場合、その目付けは１２〜２０ｇ／ｍ2程度とするのが好ましい。また、第１シート層２０Ａ及び第２シート層２０Ｂは、一枚の資材を折り返して対向させた一対の層であっても良い。 The constituent material of the first sheet layer 20A and the second sheet layer 20B can be used without particular limitation as long as it is a sheet, but it is preferable to use a nonwoven fabric from the viewpoint of air permeability and flexibility. The nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. When using a nonwoven fabric, the basis weight is preferably about 12 to 20 g / m 2 . Further, the first sheet layer 20A and the second sheet layer 20B may be a pair of layers in which a single material is folded and faced.
一方、図２に示すように、ウエスト部２３より前後方向中央側の伸縮領域２０Ｘには、弾性フィルム３０が配設されることにより幅方向の伸縮性が付与されている。すなわち、伸縮領域２０Ｘは、ウエスト部２３との境界から脚開口の縁２９にかけて、第１シート層２０Ａと、その外側に位置する第２シート層２０Ｂとの間に弾性フィルム３０が積層されてなる基本積層部分３５と、脚開口の縁部分である脚周り部２８に設けられた、基本積層部分から連続する弾性フィルム３０並びに第１シート層２０Ａ及び第２シート層２０Ｂが、脚開口の縁２９で外側に折り返されてなる折り返し積層部分３６とを有している。そして、これら基本積層部分３５及び折り返し積層部分３６は、図３、図８及び図９に示されるように、弾性フィルム３０が少なくとも幅方向に伸長された状態で、第１シート層２０Ａ及び第２シート層２０Ｂが、幅方向及び前後方向にそれぞれ間隔を空けて配列された多数の接合部４０で、弾性フィルム３０に形成された貫通孔３１を通じて接合されている。また、第１シート層２０Ａ及び第２シート層２０Ｂは、少なくとも接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂ間以外では弾性フィルム３０と接合されていない。 On the other hand, as shown in FIG. 2, the stretchable region 20 </ b> X closer to the center in the front-rear direction than the waist 23 is provided with stretchability in the width direction by the elastic film 30 being disposed. That is, the stretchable region 20X is formed by laminating the elastic film 30 between the first sheet layer 20A and the second sheet layer 20B located outside the leg opening 29 from the boundary with the waist 23. The elastic layer 30 and the first sheet layer 20A and the second sheet layer 20B, which are continuous from the basic laminated portion, are provided on the basic laminated portion 35 and the leg peripheral portion 28 that is the edge portion of the leg opening. And a folded laminated portion 36 that is folded outward. Then, as shown in FIGS. 3, 8, and 9, the basic laminated portion 35 and the folded laminated portion 36 have the first sheet layer 20 </ b> A and the second sheet layer 20 with the elastic film 30 extended at least in the width direction. The sheet layer 20 </ b> B is bonded through the through holes 31 formed in the elastic film 30 at a large number of bonding portions 40 arranged at intervals in the width direction and the front-rear direction. Further, the first sheet layer 20A and the second sheet layer 20B are not joined to the elastic film 30 except at least between the first sheet layer 20A and the second sheet layer 20B in the joining portion 40.
このような伸縮領域２０Ｘでは、図３（ｄ）に基本積層部分３５について示すように、弾性フィルム３０の自然長状態では、接合部４０間の第１シート層２０Ａ及び第２シート層２０Ｂが互いに離間する方向に膨らんで、幅方向と交差する方向に延びる収縮皺２５が形成され、図３（ｃ）に示すように、幅方向にある程度伸長した装着状態でも、収縮皺２５は伸ばされるものの、残るようになっている。また、装着状態を想定した図３（ｃ）及び第１シート層２０Ａ及び第２シート層２０Ｂの完全展開状態を想定した図３（ａ）（ｂ）からも分かるように、これらの状態では、弾性フィルム３０における貫通孔３１と、接合部４０との間に隙間が形成され、弾性フィルム３０の素材が無孔のフィルムやシートであっても、この隙間により通気性が付加される。このような伸長状態及び自然長状態の外観は図１４のサンプル写真にも現れている。また、図８及び図９の対比から容易に理解できるように、折り返し積層部分３６もシート層及び弾性フィルム３０の数が増加するだけで、同様の伸縮機構となる。 In such a stretchable region 20X, as shown for the basic laminated portion 35 in FIG. 3D, in the natural length state of the elastic film 30, the first sheet layer 20A and the second sheet layer 20B between the joint portions 40 are mutually connected. Although a shrink fold 25 is formed that swells in the direction of separation and extends in a direction intersecting the width direction, as shown in FIG. 3C, the shrink fold 25 is stretched even in a mounted state that extends to some extent in the width direction. It is supposed to remain. In addition, as can be seen from FIG. 3C assuming the mounted state and FIGS. 3A and 3B assuming the fully expanded state of the first sheet layer 20A and the second sheet layer 20B, in these states, A gap is formed between the through hole 31 in the elastic film 30 and the joint portion 40, and even if the material of the elastic film 30 is a non-porous film or sheet, air permeability is added by this gap. The appearance in the stretched state and the natural length state also appears in the sample photograph of FIG. Further, as can be easily understood from the comparison between FIG. 8 and FIG. 9, the folded laminated portion 36 becomes a similar expansion / contraction mechanism only by increasing the number of sheet layers and elastic films 30.
特徴的には、折り返し積層部分３６を設けることにより、脚周り部２８では弾性フィルム３０が二層となり、それに続く脚周り部２８とウエスト部２３との間の部分では単層となるため、脚周り部２８及びそれに続く部分が同一の弾性フィルム３０による伸縮構造でありながら、脚周り部２８をより強く締め付けることができるようになる。よって、弾性フィルム３０のみでパンツタイプ使い捨ておむつに好ましいフィット性を作り出すことができる。また、脚開口の縁２９が第１シート層２０Ａ及び第２シート層２０Ｂの折り返しにより形成されるため、第１シート層２０Ａ及び第２シート層２０Ｂが開いて見栄えや装着感を悪化させる事態も発生しにくくなる。 Characteristically, by providing the folded laminated portion 36, the elastic film 30 is formed in two layers in the leg surrounding portion 28, and a single layer is formed in a portion between the leg surrounding portion 28 and the waist portion 23 that follows, so While the surrounding portion 28 and the subsequent portion are stretchable structures by the same elastic film 30, the leg surrounding portion 28 can be tightened more strongly. Therefore, it is possible to create a suitable fit for the pants-type disposable diaper with only the elastic film 30. In addition, since the edge 29 of the leg opening is formed by folding the first sheet layer 20A and the second sheet layer 20B, there is a situation where the first sheet layer 20A and the second sheet layer 20B are opened to deteriorate the appearance and wearing feeling. Less likely to occur.
弾性フィルム３０は特に限定されるものではなく、それ自体弾性を有するものであれば特に限定なく用いることができ、例えば、スチレン系エラストマー、オレフィン系エラストマー、ポリエステル系エラストマー、ポリアミド系エラストマー及びポリウレタン系エラストマー等の熱可塑性エラストマーの１種又は２種以上のブレンド物を、Ｔダイ法やインフレーション法などの押出成形によりフィルム状に加工したものを用いることができる。また、弾性フィルム３０としては、無孔のものの他、通気のために多数の孔やスリットが形成されたものも用いることができる。特に、伸縮方向における引張強度が８〜２５Ｎ／３５ｍｍ、伸縮方向と直交する方向における引張強度が５〜２０Ｎ／３５ｍｍ、伸縮方向における引張伸度が４５０〜１０５０％、及び伸縮方向と直交する方向における引張伸度が４５０〜１４００％の弾性フィルム３０であると好ましい。なお、引張強度及び引張伸度（破断伸び）は、引張試験機（例えばＳＨＩＭＡＤＺＵ社製のＡＵＴＯＧＲＡＰＨＡＧＳ−Ｇ１００Ｎ）を用い、試験片を幅３５ｍｍ×長さ８０ｍｍの長方形状とした以外は、ＪＩＳ Ｋ７１２７：１９９９「プラスチック−引張特性の試験方法−」に準じて、初期チャック間隔を５０ｍｍとし、引張速度を３００ｍｍ／ｍｉｎとして測定される値を意味する。弾性フィルム３０の厚みは特に限定されないが、２０〜４０μｍ程度であるのが好ましい。また、弾性フィルム３０の目付は特に限定されないが、３０〜４５ｇ／ｍ2程度であるのが好ましく、特に３０〜３５ｇ／ｍ2程度であるのが好ましい。 The elastic film 30 is not particularly limited and can be used without particular limitation as long as it has elasticity per se, for example, a styrene elastomer, an olefin elastomer, a polyester elastomer, a polyamide elastomer, and a polyurethane elastomer. It is possible to use one or two or more blends of thermoplastic elastomers such as those processed into a film by extrusion molding such as a T-die method or an inflation method. Moreover, as the elastic film 30, the thing in which many holes and slits were formed for ventilation other than a non-porous thing can also be used. In particular, the tensile strength in the stretching direction is 8 to 25 N / 35 mm, the tensile strength in the direction perpendicular to the stretching direction is 5 to 20 N / 35 mm, the tensile elongation in the stretching direction is 450 to 1050%, and the direction perpendicular to the stretching direction. It is preferable that the elastic film 30 has a tensile elongation of 450 to 1400%. The tensile strength and the tensile elongation (breaking elongation) were determined in accordance with JIS except that a tensile tester (for example, AUT O GRAPHAGS-G100N manufactured by SHIMADZU) was used and the test piece was a rectangular shape having a width of 35 mm and a length of 80 mm. In accordance with K7127: 1999 “Plastics—Testing Method for Tensile Properties—”, it means a value measured with an initial chuck interval of 50 mm and a tensile speed of 300 mm / min. Although the thickness of the elastic film 30 is not specifically limited, It is preferable that it is about 20-40 micrometers. The basis weight of the elastic film 30 is not particularly limited, but is preferably about 30 to 45 g / m 2 , particularly preferably about 30 to 35 g / m 2 .
折り返し積層部分３６が形成される脚周り部２８（脚開口の縁部分）の幅（図示形態では前後方向寸法）は適宜定めることができるが、通常の場合、おむつ全長Ｙの１０〜６０％程度とすることができる。 The width of the leg periphery 28 (the edge portion of the leg opening) where the folded laminated portion 36 is formed can be determined as appropriate (in the illustrated embodiment, the front-rear direction dimension), but in the normal case, about 10 to 60% of the total length Y of the diaper. It can be.
折り返し積層部分３６の折り返し側は基本積層部分３５の内側に折り返すこともできるが、図示形態のように基本積層部分３５で弾性フィルム３０の内側に位置する第１シート層２０Ａが弾性フィルム３０とともに基本積層部分３５の外側に折り返されていると、相対的に強く締め付けられる部分となる脚周り部２８の内面に凹凸が生じないため、装着感が良好となる。 Although the folded side of the folded laminated portion 36 can be folded inside the basic laminated portion 35, the first sheet layer 20 </ b> A located inside the elastic film 30 in the basic laminated portion 35 is basically the elastic film 30 as shown in the figure. When folded back to the outer side of the laminated portion 35, the inner surface of the leg periphery portion 28, which is a portion that is relatively strongly tightened, does not have irregularities, so that the wearing feeling is good.
折り返し積層部分３６においては、図４に示す形態のように、基本積層部分３５から連続する第１シート層２０Ａ及び第２シート層２０Ｂの両方を弾性フィルム３０とともに折り返すこともできるが、図１０に示すように、第１シート層２０Ａ及び第２シート層２０Ｂのいずれか一方のシート層（図示形態では第１シート層２０Ａ）のみを弾性フィルム３０とともに折り返し、他方のシート層（図示形態では第２シート層２０Ｂ）の先端を、一方のシート層の先端と折り返しの折り目との間に位置させると、弾性フィルム３０が露出することなく、折り返し積層部分３６の厚みを減らすことができるため好ましい。 In the folded laminated portion 36, both the first sheet layer 20A and the second sheet layer 20B continuous from the basic laminated portion 35 can be folded together with the elastic film 30, as shown in FIG. As shown, only one of the first sheet layer 20A and the second sheet layer 20B (first sheet layer 20A in the illustrated embodiment) is folded together with the elastic film 30, and the other sheet layer (second sheet in the illustrated embodiment is second). It is preferable to place the leading end of the sheet layer 20B) between the leading end of one sheet layer and the folding fold, because the thickness of the folded laminated portion 36 can be reduced without exposing the elastic film 30.
他方、本発明のような弾性フィルム３０伸縮構造では、基本的に、接合部４０の面積率が高くなるほど第１シート層２０Ａ及び第２シート層２０Ｂが弾性フィルム３０により収縮する部分が少なくなり、弾性限界伸びも低下する。よって、図１１に点模様の濃淡で示すように、折り返し積層部分３６における接合部４０の面積率を、幅方向中間から幅方向両側に向かうにつれて段階的（又は連続的でも良い）に高くなるように構成すると、脚周りのフィット性を向上させることができる。 On the other hand, in the elastic film 30 stretchable structure as in the present invention, basically, as the area ratio of the joint portion 40 increases, the portion where the first sheet layer 20A and the second sheet layer 20B contract by the elastic film 30 decreases. Elastic limit elongation also decreases. Therefore, as shown by the shading of the dot pattern in FIG. 11, the area ratio of the joint 40 in the folded laminated portion 36 increases stepwise (or may be continuous) from the middle in the width direction to both sides in the width direction. If comprised in, it can improve the fitting property around a leg.
接合部４０の面積率は適宜定めることができるが、通常の場合、伸縮領域２０Ｘでは１．８〜２５％（特に１．８〜１９％）の範囲内とすることが望ましい。また、弾性限界伸びは適宜定めることができるが、通常の場合、伸縮領域２０Ｘでは１３０〜３００％（特に２００〜２９５％）程度とするのが好ましい。 The area ratio of the joint portion 40 can be determined as appropriate, but in the normal case, it is desirable that the expansion / contraction region 20X be within a range of 1.8 to 25% (particularly 1.8 to 19%). The elastic limit elongation can be determined as appropriate, but in the normal case, it is preferably about 130 to 300% (particularly 200 to 295%) in the stretchable region 20X.
接合部４０の面積率は二段階で変化させるだけでも十分なフィット性向上を図ることができるが、三段以上とすることもでき、また、本形態のような弾性フィルム３０伸縮構造であれば接合部４０のパターンだけで面積率、つまり収縮量（弾性限界伸び）を変化させることができるため、実質的に連続的に変化させることもできる。 Even if the area ratio of the joint 40 is changed in two steps, sufficient fit can be improved, but it can also be three or more, and if it is an elastic film 30 stretchable structure like this embodiment Since the area ratio, that is, the amount of shrinkage (elastic limit elongation) can be changed only by the pattern of the joint portion 40, it can be changed substantially continuously.
接合部４０の面積率を変化させるには、図１２（ａ）に示すように単位面積当たりの接合部４０の数を変えたり、図１２（ｂ）に示すように個々の接合部４０の面積を変えたりすればよい。前者の場合、個々の接合部４０の面積を同じとすることも、異なるものとすることもでき、後者の場合、単位面積当たりの接合部４０の数を同じとすることも、異なるものとすることもできる。なお、図１３（ａ）には接合部４０の面積率を三段階で変化させる場合のパターン例が示されており、図１３（ｂ）には接合部４０の面積率を二段階で変化させる場合のパターン例が示されている。 In order to change the area ratio of the joint portion 40, the number of the joint portions 40 per unit area is changed as shown in FIG. 12A, or the area of each joint portion 40 as shown in FIG. 12B. You can change it. In the former case, the area of each joint 40 can be the same or different, and in the latter case, the number of the joints 40 per unit area can be the same. You can also FIG. 13A shows an example of a pattern in which the area ratio of the joint portion 40 is changed in three stages. FIG. 13B shows a pattern example in which the area ratio of the joint section 40 is changed in two stages. An example pattern is shown.
個々の接合部４０及び貫通孔３１の自然長状態での形状は、真円形、楕円形、長方形等の多角形（線状や角丸のものを含む）、星形、雲形等、任意の形状とすることができる。 The shapes of the individual joints 40 and the through holes 31 in the natural length state are arbitrary shapes such as polygons (including linear and rounded ones) such as true circles, ellipses, and rectangles, stars, and clouds. It can be.
個々の接合部４０の大きさは、適宜定めれば良いが、大きすぎると接合部４０の硬さが感触に及ぼす影響が大きくなり、小さすぎると接合面積が少なく資材同士が十分に接着できなくなるため、通常の場合、個々の接合部４０の面積は０．１４〜３．５ｍｍ2（特に０．２５〜１．０ｍｍ2）程度とすることが好ましい。個々の貫通孔３１の開口の面積は、貫通孔３１を介して接合部が形成されるため接合部以上であれば良いが、接合部４０の面積の１〜１．５倍程度とすることが好ましい。なお、貫通孔３１の開口の面積は、当該伸縮構造２０Ｘが自然長の状態における値を意味し、貫通孔３１の開口の面積が、弾性フィルム３０の表と裏で異なる等、厚み方向に均一でない場合には最小値を意味する。 The size of each joint 40 may be determined as appropriate, but if it is too large, the effect of the hardness of the joint 40 on the feel will increase, and if it is too small, the joint area will be small and the materials will not be sufficiently bonded together. Therefore, in the normal case, the area of each joint 40 is preferably about 0.14 to 3.5 mm 2 (particularly 0.25 to 1.0 mm 2 ). The area of the opening of each through hole 31 may be equal to or greater than the joint because the joint is formed through the through hole 31, but may be about 1 to 1.5 times the area of the joint 40. preferable. In addition, the area of the opening of the through-hole 31 means a value in a state in which the expansion / contraction structure 20X is in a natural length, and the area of the opening of the through-hole 31 is different between the front and back of the elastic film 30, and is uniform in the thickness direction. If not, it means the minimum value.
接合部４０及び貫通孔３１の平面配列は適宜定めることができるが、規則的に繰り返される平面配列が好ましく、図１５（ａ）に示すような斜方格子状や、図１５（ｂ）に示すような六角格子状（これらは千鳥状ともいわれる）、図１５（ｃ）に示すような正方格子状、図１５（ｄ）に示すような矩形格子状、図１５（ｅ）に示すような平行体格子（図示のように、多数の平行な斜め方向の列の群が互いに交差するように２群設けられる形態）状等（これらが伸縮方向に対して９０度未満の角度で傾斜したものを含む）のように規則的に繰り返されるものの他、接合部４０の群（群単位の配列は規則的でも不規則でも良く、模様や文字状等でも良い）が規則的に繰り返されるものとすることもできる。接合部４０及び貫通孔３１の配列形態は、面積率の異なる複数の領域において同じものとする他、異なるものとすることもできる。 The plane arrangement of the joints 40 and the through holes 31 can be determined as appropriate, but a plane arrangement that is regularly repeated is preferable, such as an oblique lattice shape as shown in FIG. 15 (a), or as shown in FIG. 15 (b). Hexagonal lattice shape (these are also called staggered shapes), a square lattice shape as shown in FIG. 15 (c), a rectangular lattice shape as shown in FIG. 15 (d), and a parallel shape as shown in FIG. 15 (e). Body lattice (in the form shown in the figure, two groups are provided so that a large number of groups of parallel diagonal rows intersect each other), etc. (in which these are inclined at an angle of less than 90 degrees with respect to the expansion / contraction direction) In addition to those that are regularly repeated, the group of joints 40 (group unit arrangement may be regular or irregular, and may be a pattern, a character shape, etc.) shall be regularly repeated. You can also. The arrangement form of the joint portions 40 and the through holes 31 may be the same or different in a plurality of regions having different area ratios.
接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂの接合手段は特に限定されない。例えば、接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂの接合はホットメルト接着剤によりなされていても、ヒートシールや超音波シール等の素材溶着による接合手段によりなされていても良い。素材溶着による接合手段を用いる場合、特許文献１記載のように、弾性フィルムの貫通孔を押し出しにより形成し、その貫通孔の位置で第１シート層２０Ａ及び第２シート層２０Ｂを直接に溶着により接合することもできるが、剥離強度が低く、強い力が加わると剥がれるおそれがある。また、特許文献１記載のものは、弾性フィルムの貫通孔を押し出しにより形成するため、図８（ｂ）及び図９（ｂ）に示すように、第１シート層２０Ａ及び第２シート層２０Ｂ間に弾性フィルム３０が残らず、貫通孔３１の周囲に図示しない押し出し破片が移動可能に残るおそれもある。また、特許文献１記載のものと異なり、図８（ｃ）及び図９（ｃ）に示すように、弾性フィルム３０に貫通孔を形成せずに、弾性フィルム３０を介して第１シート層２０Ａ及び第２シート層２０Ｂを接合することも考えられるが、その場合はさらに剥離強度が低いものとなるだけでなく、貫通孔３１を有しないため通気性が極めて低いという問題点もある。 The joining means of the first sheet layer 20A and the second sheet layer 20B in the joining part 40 is not particularly limited. For example, the joining of the first sheet layer 20A and the second sheet layer 20B in the joining portion 40 may be performed by a hot melt adhesive, or may be performed by a joining means such as heat sealing or ultrasonic sealing. When using the joining means by material welding, as described in Patent Document 1, the through hole of the elastic film is formed by extrusion, and the first sheet layer 20A and the second sheet layer 20B are directly welded at the position of the through hole. Although it can be joined, the peel strength is low, and there is a risk of peeling when a strong force is applied. Moreover, since the thing of patent document 1 forms the through-hole of an elastic film by extrusion, as shown in FIG.8 (b) and FIG.9 (b), between 1st sheet layer 20A and 2nd sheet layer 20B Further, there is a possibility that the elastic film 30 does not remain, and extruded fragments (not shown) remain movably around the through hole 31. Further, unlike the one described in Patent Document 1, as shown in FIGS. 8C and 9C, the first sheet layer 20 </ b> A is not formed through the elastic film 30 without forming a through hole in the elastic film 30. It is also conceivable to join the second sheet layer 20B, but in this case, not only the peel strength is further lowered, but also there is a problem that the air permeability is extremely low because the through hole 31 is not provided.
よって、素材溶着による接合手段を用いる場合には、図８（ａ）及び図９（ａ）に示すように、接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂの接合が、少なくとも、第１シート層２０Ａ及び第２シート層２０Ｂにわたる弾性フィルム３０の溶融固化物３０ｍによりなされている形態が好ましい。このように弾性フィルム３０の溶融固化物３０ｍを接着剤として第１シート層２０Ａ及び第２シート層２０Ｂを接合すると、剥離強度が高いものとなり、高い通気性と高い剥離強度とを両立できるようになる。 Therefore, when using the joining means by material welding, as shown in FIG. 8A and FIG. 9A, the joining of the first sheet layer 20A and the second sheet layer 20B in the joining portion 40 is at least as follows. The form made | formed by 30 m of the melt-solidified material of the elastic film 30 over the 1st sheet layer 20A and the 2nd sheet layer 20B is preferable. In this way, when the first sheet layer 20A and the second sheet layer 20B are joined using the melt-solidified material 30m of the elastic film 30 as an adhesive, the peel strength becomes high, so that both high air permeability and high peel strength can be achieved. Become.
このような接合構造は、例えば図１８に示すように、第１シート層２０Ａと第２シート層２０Ｂとの間に弾性フィルム３０を伸縮方向と直交する方向にほぼ均等な伸長率で伸縮方向に伸長しつつ挟み、基本積層部分３５及び折り返し積層部分３６を形成した状態で、所定の接合部４０のパターンで溶着することにより、多数箇所で弾性フィルム３０を溶融して貫通孔３１を形成するとともに、その貫通孔３１の位置で少なくとも弾性フィルム３０の溶融物の固化により第１シート層２０Ａ及び第２シート層２０Ｂを接合する手法を用いて簡素かつ効率的に製造することができる。この場合、自然長状態では、個々の接合部４０の形状・面積と個々の貫通孔３１の形状・面積とがほぼ等しくなる。なお、図１８は、ヒートシール装置を用いた例を示しており、前述の接合部４０のパターンに配列された多数の加圧凸部６０ｐを外周面に備えたシールロール６０と、これに対向配置された表面平滑なアンビルロール６１とにより、第１シート層２０Ａ及び第２シート層２０Ｂ間に弾性フィルム３０を挟んだ状態の加工対象を挟み、加圧凸部６０ｐを加熱することにより、加圧凸部６０ｐとアンビルロール６１の外周面との間で厚み方向に加圧される部位のみ、弾性フィルム３０を溶融して貫通孔３１を形成するとともに、その貫通孔３１の位置で少なくとも弾性フィルム３０の溶融物の固化により第１シート層２０Ａ及び第２シート層２０Ｂを接合しているが、所望のパターンで弾性フィルム３０を溶融して貫通孔３１を形成するとともに、その貫通孔３１の位置で少なくとも弾性フィルム３０の溶融物の固化により第１シート層２０Ａ及び第２シート層２０Ｂを接合しうるものであれば、超音波シール等の他の装置を用いることもできる。 For example, as shown in FIG. 18, such a joining structure is obtained by extending the elastic film 30 between the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B in the expansion / contraction direction with a substantially uniform elongation rate in the direction orthogonal to the expansion / contraction direction. While being stretched and sandwiched to form the basic laminated portion 35 and the folded laminated portion 36, the elastic film 30 is melted at a plurality of locations to form the through holes 31 by welding in a predetermined pattern of the joint portion 40. In addition, the first sheet layer 20A and the second sheet layer 20B can be simply and efficiently manufactured by using a method in which the melt of the elastic film 30 is solidified at the position of the through-hole 31. In this case, in the natural length state, the shape / area of each joint 40 and the shape / area of each through-hole 31 are substantially equal. FIG. 18 shows an example using a heat seal device, which is opposed to a seal roll 60 having a large number of pressurizing convex portions 60p arranged in the pattern of the joint portion 40 on the outer peripheral surface. The processed object in a state where the elastic film 30 is sandwiched between the first sheet layer 20A and the second sheet layer 20B is sandwiched between the smooth anvil roll 61 and the pressurizing convex portion 60p is heated. The elastic film 30 is melted to form the through-hole 31 only at the portion pressed in the thickness direction between the pressure convex portion 60p and the outer peripheral surface of the anvil roll 61, and at least the elastic film is located at the position of the through-hole 31. While the first sheet layer 20A and the second sheet layer 20B are joined by solidifying the melt of 30, the elastic film 30 is melted in a desired pattern to form the through holes 31. As long as the first sheet layer 20A and the second sheet layer 20B can be joined by solidifying the melt of the elastic film 30 at the position of the through hole 31, other devices such as an ultrasonic seal can be used. .
弾性フィルム３０の融点、並びに第１シート層２０Ａ及び第２シート層２０Ｂの融点、溶着箇所における加工温度の高低の関係は適宜定めることができるが、第１シート層２０Ａ及び第２シート層２０Ｂの融点が弾性フィルム３０の融点以下とされ、溶着箇所において第１シート層２０Ａ及び第２シート層２０Ｂの全体及び弾性フィルム３０の全体が溶融・混合し、接合部４０が形成されるよりも、第１シート層２０Ａ及び第２シート層２０Ｂの融点が弾性フィルム３０の融点よりも高く、溶着箇所で弾性フィルム３０が溶融するとともに、第１シート層２０Ａ及び第２シート層２０Ｂの一部又は全部が溶融しない方が好ましい。すなわち、後者の場合、図１６及び図１７からも分かるように、接合部４０の周囲から連続する第１シート層２０Ａ及び第２シート層２０Ｂの繊維２０ｆが残っており、第１シート層２０Ａ及び第２シート層２０Ｂにわたり浸透し固化した弾性フィルム３０の溶融固化物３０ｍにより第１シート層２０Ａ及び第２シート層２０Ｂが接合された構造となり、第１シート層２０Ａ及び第２シート層２０Ｂに対する弾性フィルム３０の溶融固化物３０ｍの食い付きが良好となるだけでなく、第１シート層２０Ａ及び第２シート層２０Ｂの強度が低下しにくくなるため、より一層剥離強度に優れたものとなる。なお、第１シート層２０Ａ及び第２シート層２０Ｂの一部が溶融しないことには、接合部の全繊維について芯（複合繊維における芯だけでなく単成分繊維の中心部分を含む）は残るがその周囲部分（複合繊維における鞘だけでなく単成分繊維の表層側の部分を含む）は溶融する形態や、一部の繊維は全く溶融しないが、残りの繊維は全部が溶融する又は芯は残るがその周囲部分は溶融する形態を含む。 The relationship between the melting point of the elastic film 30, the melting points of the first sheet layer 20A and the second sheet layer 20B, and the level of the processing temperature at the welding position can be determined as appropriate, but the first sheet layer 20A and the second sheet layer 20B The melting point is set to be equal to or lower than the melting point of the elastic film 30, and the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B and the entire elastic film 30 are melted and mixed at the welding position, and the joining portion 40 is formed. The melting points of the first sheet layer 20A and the second sheet layer 20B are higher than the melting point of the elastic film 30, and the elastic film 30 is melted at the welding location, and part or all of the first sheet layer 20A and the second sheet layer 20B are It is preferable not to melt. That is, in the latter case, as can be seen from FIGS. 16 and 17, the fibers 20 f of the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B continuous from the periphery of the joint 40 remain, and the first sheet layer 20 </ b> A and The first sheet layer 20A and the second sheet layer 20B are joined by the melt-solidified material 30m of the elastic film 30 that has permeated and solidified over the second sheet layer 20B, and is elastic to the first sheet layer 20A and the second sheet layer 20B. Not only the biting of the melt-solidified material 30m of the film 30 becomes good, but the strength of the first sheet layer 20A and the second sheet layer 20B is not easily lowered, so that the peel strength is further improved. In addition, although a part of the first sheet layer 20A and the second sheet layer 20B does not melt, the core (including not only the core in the composite fiber but also the central part of the single component fiber) remains for all the fibers in the joint portion. The surrounding part (including not only the sheath in the composite fiber but also the part on the surface side of the single component fiber) melts, and some of the fibers do not melt at all, but the remaining fibers all melt or the core remains However, the surrounding part includes a molten form.
このような観点から、弾性フィルム３０の融点は８０〜１４５℃程度のものが好ましく、第１シート層２０Ａ及び第２シート層２０Ｂの融点は８５〜１９０℃程度、特に１５０〜１９０℃程度のものが好ましく、また、第１シート層２０Ａ及び第２シート層２０Ｂの融点と弾性フィルム３０の融点との差は６０〜８０℃程度であるのが好ましい。 From such a viewpoint, the melting point of the elastic film 30 is preferably about 80 to 145 ° C., and the melting points of the first sheet layer 20A and the second sheet layer 20B are about 85 to 190 ° C., particularly about 150 to 190 ° C. The difference between the melting point of the first sheet layer 20A and the second sheet layer 20B and the melting point of the elastic film 30 is preferably about 60 to 80 ° C.
また、パンツタイプ使い捨ておむつにおける吸収体１３と重なる領域は、製造上の理由により弾性フィルム３０を配置させることが望ましいものの伸縮が不要な領域である。よって、外装体２６，２７の伸縮領域２０Ｘにおける吸収体１３と重なる部分における接合部の面積率を高くし、弾性限界伸びが１３０％以下の非伸縮領域としたり、弾性部材を設けずに非伸縮領域としたりすることもできる。 Moreover, although the area | region which overlaps with the absorber 13 in a pants type disposable diaper is desirable to arrange | position the elastic film 30 for the reason on manufacture, it is an area | region which does not require expansion-contraction. Therefore, the area ratio of the joint portion in the portion overlapping the absorber 13 in the stretchable region 20X of the exterior bodies 26 and 27 is increased, and the non-stretchable region is set to a non-stretchable region having an elastic limit elongation of 130% or less or is not provided with an elastic member. Or an area.
（前後押さえシート）
図１及び図４にも示されるように、外装体２６，２７の内面上に取り付けられた内装体１０の前後端部をカバーし、且つ内装体１０の前後縁からの漏れを防ぐために、前後押さえシート５０，６０が設けられていても良い。図示形態について更に詳細に説明すると、前押さえシート５０は、前身頃Ｆ内面のうちウエスト側端部の折り返し部分２０Ｃの内面から内装体１０の前端部と重なる位置まで幅方向全体にわたり延在しており、後押さえシート６０は、後身頃Ｂ内面のうちウエスト側端部の折り返し部分２０Ｃの内面から内装体１０の後端部と重なる位置まで幅方向全体にわたり延在している。前後押さえシート５０，６０の股間側の縁部に幅方向の全体にわたり（中央部のみでも良い）若干の非接着部分を設けると、接着剤がはみ出ないだけでなく、この部分を表面シートから若干浮かせて防漏壁として機能させることができる。
(Front / rear holding sheet)
As shown in FIGS. 1 and 4, the front and rear ends of the interior body 10 mounted on the inner surfaces of the exterior bodies 26 and 27 are covered to prevent leakage from the front and rear edges of the interior body 10. The pressing sheets 50 and 60 may be provided. Explaining in more detail about the illustrated form, the front presser sheet 50 extends over the entire width direction from the inner surface of the folded portion 20C of the waist side end of the front body F to the position overlapping the front end of the interior body 10. The rear pressing sheet 60 extends over the entire width direction from the inner surface of the folded portion 20C of the waist side end portion to the position overlapping the rear end portion of the interior body 10 in the inner surface of the back body B. When a slight non-adhesive portion is provided over the entire width direction (or only the central portion) at the crotch side edges of the front and rear pressing sheets 50, 60, not only does the adhesive not protrude, but this portion is slightly removed from the surface sheet. Can float and function as a leak-proof wall.
図示形態のように、前後押さえシート５０，６０を別体として取り付けると、素材選択の自由度が高くなる利点があるものの、資材や製造工程が増加する等のデメリットもある。そのため、外装体２６，２７をおむつ内面に折り返してなる折り返し部分２０Ｃを、内装体１０と重なる部分まで延在させて、前述の押さえシート５０，６０と同等の部分を形成することもできる。 If the front and rear pressing sheets 50 and 60 are attached separately as in the illustrated form, there is an advantage that the degree of freedom of material selection is increased, but there are also disadvantages such as an increase in materials and manufacturing processes. Therefore, the folded portions 20C formed by folding the exterior bodies 26 and 27 to the inner surface of the diaper can be extended to the portion overlapping the interior body 10 to form portions equivalent to the press sheets 50 and 60 described above.
（その他）
（ａ）上記例は、腹側外装体２６と背側外装体２７とが分離された外装二分割構造の例であるが、股間を介して腹側から背側まで連続する外装体に対して適用することもできる。この連続外装体における腹側の領域及び背側の領域は、前述の腹側外装体２６Ｆ及び背側外装体２７に相当するため、本発明では両者を総称して腹側外装部分及び背側外装部分としたものである。
(Other)
(A) The above example is an example of an exterior two-part structure in which the abdominal exterior body 26 and the back exterior body 27 are separated, but with respect to the exterior body that continues from the abdomen to the back via the crotch It can also be applied. Since the ventral region and the dorsal region in the continuous exterior body correspond to the abdominal exterior body 26F and the backside exterior body 27 described above, in the present invention, both are collectively referred to as the abdominal exterior portion and the backside exterior. It is a part.
（ｂ）上記例は、腹側外装体２６及び背側外装体２７の両方に折り返し積層部分３６を設けているが、いずれか一方にのみ折り返し積層部分３６を設けることもできる。 (B) In the above example, the folded laminated portion 36 is provided on both the abdominal exterior body 26 and the back exterior body 27, but the folded laminated portion 36 can be provided on only one of them.
（ｃ）図示例は、外装体２６，２７のウエスト部２３以外に弾性フィルム３０による伸縮領域２０Ｘに設けた例であるが、ウエスト部２３まで弾性フィルム３０による伸縮領域２０Ｘを延在させ、細長状のウエスト部弾性部材２４を省略することもできる。 (C) Although the example of illustration is the example provided in the expansion-contraction area | region 20X by the elastic film 30 other than the waist part 23 of the exterior bodies 26 and 27, the expansion-contraction area | region 20X by the elastic film 30 is extended to the waist part 23, and is elongate. The shaped waist elastic member 24 can be omitted.
（ｄ）上記例では脚周り部２８（脚開口の縁部分）にのみ折り返し積層部分３６を設けているが、これとともに（又はこれに代えて）、図１９及び図２０に示す形態のようにウエスト部２３まで基本積層部分３５を延在させ、ウエスト部２３（ウエスト開口の縁部分）に折り返し積層部分３６を設けても良い。 (D) In the above example, the folded laminated portion 36 is provided only at the leg surrounding portion 28 (the edge portion of the leg opening), but together with (or instead of) this, as shown in FIGS. 19 and 20 The basic laminated portion 35 may be extended to the waist portion 23, and the folded laminated portion 36 may be provided on the waist portion 23 (the edge portion of the waist opening).
＜明細書中の用語の説明＞
明細書中の以下の用語は、明細書中に特に記載が無い限り、以下の意味を有するものである。
・「伸長率」は、自然長を１００％としたときの値を意味する。
・「目付け」は次のようにして測定されるものである。試料又は試験片を予備乾燥した後、標準状態（試験場所は、温度２０±５℃、相対湿度６５％以下）の試験室又は装置内に放置し、恒量になった状態にする。予備乾燥は、試料又は試験片を相対湿度１０〜２５％、温度５０℃を超えない環境で恒量にすることをいう。なお、公定水分率が０．０％の繊維については、予備乾燥を行わなくてもよい。恒量になった状態の試験片から米坪板(２００ｍｍ×２５０ｍｍ、±２ｍｍ)を使用し、２００ｍｍ×２５０ｍｍ（±２ｍｍ）の寸法の試料を切り取る。試料の重量を測定し、２０倍して１平米あたりの重さを算出し、目付けとする。
・「厚み」は、自動厚み測定器（ＫＥＳ−Ｇ５ ハンディ圧縮計測プログラム）を用い、荷重：０．０９８Ｎ／ｃｍ2、及び加圧面積：２ｃｍ2の条件下で自動測定する。
・試験や測定における環境条件についての記載が無い場合、その試験や測定は、標準状態（試験場所は、温度２０±５℃、相対湿度６５％以下）の試験室又は装置内で行うものとする。
<Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.
“Elongation rate” means a value when the natural length is 100%.
・ "Weight" is measured as follows. After the sample or test piece has been pre-dried, it is left in a test room or apparatus in a standard state (test location is temperature 20 ± 5 ° C., relative humidity 65% or less) to obtain a constant weight. Pre-drying refers to making a sample or test piece constant in an environment where the relative humidity is 10 to 25% and the temperature does not exceed 50 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%. A sample with a size of 200 mm × 250 mm (± 2 mm) is cut out from the test piece in a constant weight using a rice-basis plate (200 mm × 250 mm, ± 2 mm). Measure the weight of the sample, multiply it by 20, calculate the weight per square meter, and use it as the basis weight.
-"Thickness" is automatically measured using an automatic thickness measuring instrument (KES-G5 handy compression measurement program) under the conditions of load: 0.098 N / cm 2 and pressure area: 2 cm 2 .
・ If there is no description about the environmental conditions in the test and measurement, the test and measurement shall be performed in a test room or equipment in the standard condition (test location is temperature 20 ± 5 ℃, relative humidity 65% or less). .
本発明は、上記例のようなパンツタイプ使い捨ておむつに利用できるものである。 The present invention can be used for a pants-type disposable diaper as in the above example.
Ｂ…後身頃、Ｆ…前身頃、Ｌ…中間領域、Ｔ…胴周り領域、１０…内装体、１１…液透過性表面シート、１２…液不透過性裏面側シート、１３…吸収体、１３Ｎ…括れ部分、１４…包装シート、１５…ギャザー不織布、１６…ギャザー弾性部材、２０Ａ…第１シート層、２０Ｂ…第２シート層、２０Ｘ…伸縮領域、２１…サイドシール部、２２…股間部外装体、２４…ウエスト部弾性部材、２５…収縮皺、２６，２７…外装体、２６…腹側外装体、２７…背側外装体、２８…脚周り部、２９…脚開口の縁、３０…弾性フィルム、３１…貫通孔、３５…基本積層部分、３６…折り返し積層部分、４０…接合部。 B ... Rear body, F ... Front body, L ... Middle region, T ... Trunk circumference region, 10 ... Interior body, 11 ... Liquid permeable top sheet, 12 ... Liquid impervious back side sheet, 13 ... Absorber, 13N DESCRIPTION OF SYMBOLS ... Constriction part, 14 ... Packaging sheet, 15 ... Gathered nonwoven fabric, 16 ... Gather elastic member, 20A ... 1st sheet layer, 20B ... 2nd sheet layer, 20X ... Expansion / contraction area, 21 ... Side seal part, 22 ... Crotch part exterior Body, 24 ... waist elastic member, 25 ... contraction fold, 26, 27 ... exterior body, 26 ... ventral side exterior body, 27 ... back side exterior body, 28 ... leg periphery, 29 ... edge of leg opening, 30 ... Elastic film, 31 ... through hole, 35 ... basic laminated portion, 36 ... folded laminated portion, 40 ... joined portion.
Claims (3)
前側の部分が前記腹側外装体の幅方向中央領域に、及び後側の部分が前記背側外装体の幅方向中央領域にそれぞれ接合され、装着者の股間を通るように設けられた内装体と、を備え、
前記外装体における前記内装体の幅方向両側に位置する部分の縁により、脚開口の縁の少なくとも一部が形成された、パンツタイプ使い捨ておむつにおいて、
前記腹側外装部分及び背側外装部分の少なくとも一方の外装部分は、
前記ウエスト開口及び脚開口の少なくとも一方の開口の縁部分からそれに続く部分にかけて、第１シート層と第２シート層との間に弾性フィルムが積層された基本積層部分と、
前記開口の縁部分に設けられた、前記基本積層部分から連続する弾性フィルム並びに前記第１シート層及び第２シート層の少なくとも一方のシート層が、前記開口の縁で当該一方のシート層と反対側に折り返された折り返し積層部分とを有しており、
前記基本積層部分及び折り返し積層部分では、前記弾性フィルムが少なくとも幅方向に伸長された状態で、前記第１シート層及び第２シート層が、幅方向及び前後方向にそれぞれ間隔を空けて配列された多数の接合部で接合されており、
前記折り返し積層部分における前記接合部の面積率が、幅方向中間から幅方向両側に向かうにつれて段階的又は連続的に高くなるように構成されている、
ことを特徴とするパンツタイプ使い捨ておむつ。 An exterior body having a ventral exterior part and a back exterior part, wherein a side edge of the abdominal exterior part and a side edge of the back exterior part are joined on both sides in the width direction to form a waist opening. When,
The interior body provided such that the front portion is joined to the center region in the width direction of the abdominal exterior body and the rear portion is joined to the center region in the width direction of the back exterior body, and passes through the crotch of the wearer. And comprising
In the pants-type disposable diaper in which at least part of the edge of the leg opening is formed by the edge of the portion located on both sides in the width direction of the interior body in the exterior body,
At least one exterior part of the ventral exterior part and the back exterior part is
A basic laminated portion in which an elastic film is laminated between the first sheet layer and the second sheet layer from the edge portion of at least one of the waist opening and the leg opening to the subsequent portion;
The elastic film that is provided at the edge portion of the opening and that is continuous with the basic laminated portion, and at least one of the first sheet layer and the second sheet layer is opposite to the one sheet layer at the edge of the opening. A folded laminated portion folded back to the side,
In the basic laminated portion and the folded laminated portion, the first sheet layer and the second sheet layer are arranged at intervals in the width direction and the front-rear direction with the elastic film stretched at least in the width direction. It is joined at many joints ,
The area ratio of the joint in the folded laminated portion is configured to increase stepwise or continuously from the middle in the width direction toward both sides in the width direction .
A pants-type disposable diaper characterized by that.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015068069A JP6276215B2 (en) | 2015-03-30 | 2015-03-30 | Pants-type disposable diaper |
| PCT/JP2016/060424 WO2016159095A1 (en) | 2015-03-30 | 2016-03-30 | Underpants-type disposable diaper |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2015068069A JP6276215B2 (en) | 2015-03-30 | 2015-03-30 | Pants-type disposable diaper |
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| JP2015225982A Division JP5956667B1 (en) | 2015-03-30 | 2015-11-18 | Pants-type disposable diaper |
| JP2016066761A Division JP6739962B2 (en) | 2016-03-29 | 2016-03-29 | Pants type disposable diaper |
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| JP2016187387A JP2016187387A (en) | 2016-11-04 |
| JP2016187387A5 JP2016187387A5 (en) | 2017-11-09 |
| JP6276215B2 true JP6276215B2 (en) | 2018-02-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2016190031A (en) * | 2016-03-29 | 2016-11-10 | 大王製紙株式会社 | Underpants type disposable diaper |
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| JP7256775B2 (en) | 2020-08-11 | 2023-04-12 | 大王製紙株式会社 | Disposable wearing article |
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| US6830800B2 (en) * | 1999-12-21 | 2004-12-14 | The Procter & Gamble Company | Elastic laminate web |
| JP4934835B2 (en) * | 2007-04-10 | 2012-05-23 | 株式会社瑞光 | Method for manufacturing laminated stretchable sheet |
| US20120323204A1 (en) * | 2011-06-15 | 2012-12-20 | Poole Lacey L | Disposable absorbent garment having colored facings and integral waistband |
| PL2726037T3 (en) * | 2011-06-30 | 2019-03-29 | Essity Hygiene And Health Aktiebolag | Method of forming an elastic laminate |
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| JP2016190031A (en) * | 2016-03-29 | 2016-11-10 | 大王製紙株式会社 | Underpants type disposable diaper |
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