JP2019166217A - Disposable wearing article - Google Patents

Disposable wearing article Download PDF

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JP2019166217A
JP2019166217A JP2018057708A JP2018057708A JP2019166217A JP 2019166217 A JP2019166217 A JP 2019166217A JP 2018057708 A JP2018057708 A JP 2018057708A JP 2018057708 A JP2018057708 A JP 2018057708A JP 2019166217 A JP2019166217 A JP 2019166217A
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waist
sheet
elastic
band
dimension
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JP2019166217A5 (en
JP7387253B2 (en
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美奈 高石
Mina Takaishi
美奈 高石
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Daio Paper Corp
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Daio Paper Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/344—Stretching or tensioning the joint area during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/086—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary anvil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B29C66/7294—Non woven mats, e.g. felt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B29C66/81429—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83415—Roller, cylinder or drum types the contact angle between said rollers, cylinders or drums and said parts to be joined being a non-zero angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/4871—Underwear
    • B29L2031/4878—Diapers, napkins

Abstract

To more strongly tighten a waist without increase of thickness in the waist.SOLUTION: The above problem is solved as follows: a first sheet layer 20A and a second sheet layer 20B of an exterior body 20 are welded through joining holes 31 penetrating through an elastic sheet 30 interposed between the first sheet layer 20A and the second sheet layer 20B with sheet joints 40 arranged at intervals; a non-hole zone 32 consecutive in an expanded state along a width direction WD and a connecting band 53 where the sheet joints 40 are arranged in the width direction WD at intervals are provided in a perpendicular direction XD alternatingly and repeatedly, in a stretching area 80 of a waist 23; the consecutive non-hole bands 32 are provided along the width direction WD in the expanded state, in a stretching area 80 of a waist adjacent part 22; and the size in the perpendicular direction XD of multiple non-hole bands 32 in the waist 23 is longer than the size in the perpendicular direction XD of the non-hole band 32 of the waist adjacent part 22.SELECTED DRAWING: Figure 19

Description

本発明は、弾性フィルム等の弾性シートにより弾性伸縮する伸縮部材を備えた使い捨て着用物品に関する。   The present invention relates to a disposable wearing article provided with an elastic member that elastically expands and contracts by an elastic sheet such as an elastic film.

使い捨ておむつ等の使い捨て着用物品においては、身体表面へのフィット性を向上するために、脚周りや胴周り等の適所に伸縮性を付与することが一般的である。伸縮性を付与するための手法としては、従来、糸ゴム等の細長状弾性部材をその長手方向に伸長した状態で取り付ける手法が広く採用されているが、ある程度の幅で伸縮性を付与したい場合には、糸ゴムを幅に間隔を置いて並べて配置した状態で固定する態様が採用されている。また、さらに面としてのフィット性に優れるものとして、弾性シート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１及び特許文献２参照）。   In disposable wearing articles such as disposable diapers, in order to improve the fit to the body surface, it is common to impart stretchability to appropriate places such as around the legs and around the trunk. As a method for imparting stretchability, conventionally, a method of attaching an elongated elastic member such as rubber thread in a state of being stretched in the longitudinal direction has been widely adopted, but when it is desired to impart stretchability to some extent Adopts a mode in which the rubber thread is fixed in a state of being arranged side by side with an interval in width. In addition, as an excellent surface fit, a method of attaching an elastic sheet in a stretched state in a stretchable direction has been proposed. (For example, refer to Patent Document 1 and Patent Document 2).

この弾性シートを含む伸縮部材は、第１シート層と第２シート層との間に弾性シートが積層されるとともに、弾性シートが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点状のシート接合部で、弾性シートに形成された接合孔を通じて溶着されてなるものである。そして、この伸縮部材は、自然長状態では、シート接合部間において弾性シートが収縮するのに伴い、シート接合部の間隔が狭くなり、第１シート層及び第２シート層におけるシート接合部間に伸縮方向と交差する方向に延びる襞が形成される。反対に伸長時には、シート接合部間において弾性シートが伸長するのに伴い、シート接合部の間隔及び第１シート層及び第２シート層における襞が広がり、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。この弾性シートによる伸縮領域は、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シート層と弾性シートとの接合が無く、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、弾性シートの接合孔が通気性向上にも寄与するという利点がある。   The elastic member including the elastic sheet includes the first sheet layer and the second sheet in a state where the elastic sheet is laminated between the first sheet layer and the second sheet layer and the elastic sheet is stretched in the expansion / contraction direction. The layers are welded through bonding holes formed in the elastic sheet at a large number of dotted sheet bonding portions arranged at intervals in the expansion / contraction direction and the direction orthogonal thereto. In the natural length state, the elastic member contracts between the sheet joining portions in the first sheet layer and the second sheet layer as the elastic sheet contracts between the sheet joining portions and the interval between the sheet joining portions becomes narrower. A ridge extending in a direction intersecting with the expansion / contraction direction is formed. On the other hand, when the elastic sheet is stretched between the sheet joining portions, the spacing between the sheet joining portions and the wrinkles in the first sheet layer and the second sheet layer are widened to extend the first sheet layer and the second sheet layer completely. Elastic extension is possible up to the deployed state. The stretchable region by the elastic sheet has not only excellent surface fit, but also the first sheet layer and the second sheet layer are not bonded to the elastic sheet, and the first sheet layer and the second sheet layer are also bonded. Since there are very few, it is very flexible, and there exists an advantage that the joint hole of an elastic sheet contributes also to air permeability improvement.

他方、パンツタイプ使い捨ておむつ等の使い捨て着用物品において、上述の弾性シートを含む伸縮部材を採用する場合、構造の簡素化及び資材コストの抑制のためには、同一の弾性シート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。   On the other hand, in a disposable wearing article such as a pants-type disposable diaper, when an elastic member including the elastic sheet described above is adopted, in order to simplify the structure and suppress material costs, the elastic region can be expanded as wide as possible with the same elastic sheet. It is desirable to form

また、一般に、使い捨て着用物品では、ウエスト部には強い締め付け力が要求されるのに対して、前後のウエスト部の間に位置するウエスト隣接部はウエスト部よりも締め付け力を弱くすることが望ましい。   Moreover, in general, in a disposable wearing article, a strong tightening force is required for the waist portion, but it is desirable that the waist adjacent portion located between the front and back waist portions be weaker than the waist portion. .

しかし、同一の弾性シートを有する部分は、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。したがって、ウエスト部にウエスト隣接部よりも強い締め付け力をもたせることは困難となっている。これを解決する手法の一つとして、特許文献３では、ウエスト部における弾性シートの折り返しにより、弾性シートの積層数を向上させることが提案されているが、ウエスト部の厚みが増加するという問題点がある。他の解決手法としては、ウエスト部にだけ細長状弾性部材を設けるといった、従来から広く用いられている構造を採用することも提案されているが、より簡素な構造として弾性シートのみによる解決策が望まれている。   However, the part which has the same elastic sheet cannot change a clamping force in the direction orthogonal to the expansion-contraction direction normally. Therefore, it is difficult to give the waist part a stronger tightening force than the waist adjacent part. As one method for solving this, Patent Document 3 proposes to improve the number of laminated elastic sheets by folding the elastic sheets at the waist, but the problem is that the thickness of the waist increases. There is. As another solution method, it has been proposed to adopt a structure that has been widely used, such as providing an elongated elastic member only at the waist, but there is a solution using only an elastic sheet as a simpler structure. It is desired.

特表２００４−５３２７５８号公報JP-T-2004-532758 特開２０１６−１８９９３２号公報JP, 2006-189932, A 特開２０１６−１８７３８７号公報JP, 2006-187387, A

そこで、本発明の主たる課題は、単一の弾性シートによりウエスト部及びウエスト隣接部に伸縮性が付与されるものでありながら、ウエスト部の厚み増加なく、ウエスト部をより強く締め付けることができる使い捨ておむつを提供することにある。   Therefore, the main problem of the present invention is a disposable that can tighten the waist portion more strongly without increasing the thickness of the waist portion, while providing elasticity to the waist portion and the waist adjacent portion by a single elastic sheet. To provide diapers.

上記課題を解決した伸縮部材及びこの伸縮部材を有する使い捨て着用物品、並びに伸縮部材の製造方法は以下のとおりである。
＜第１の態様＞
ウエスト部と、ウエスト部に隣接するウエスト隣接部とを有する伸縮部材を備えた、使い捨て着用物品において、
前記伸縮部材における前記ウエスト部及び前記ウエスト隣接部は、第１シート層、第２シート層、及びこれらの間に介在された弾性シートを有しており、
前記弾性シートは、前記ウエスト部から前記ウエスト隣接部にわたり連続しており、
前記第１シート層及び第２シート層は、間隔を空けて配列されたシート接合部で、弾性シートを貫通する接合孔を通じて溶着されており、
前記伸縮部材における前記ウエスト部及び前記ウエスト隣接部は、前記弾性シートの収縮により幅方向に収縮しているとともに幅方向に伸長可能な伸縮領域を有しており、
前記ウエスト部の伸縮領域には、展開状態で、前記接合孔を有しない部分が幅方向に沿って連続する無孔帯と、前記シート接合部が幅方向に間隔を空けて配置された接合帯とが、幅方向と直交する直交方向に交互に繰り返し設けられており、
前記ウエスト隣接部の伸縮領域には、展開状態で、前記接合孔を有しない部分が幅方向に沿って連続する無孔帯が設けられるとともに、前記ウエスト部における複数本の前記無孔帯の前記直交方向の寸法が、前記ウエスト隣接部の無孔帯の前記直交方向の寸法よりも長いか、又は、前記無孔帯が設けられていない、
ことを特徴とする使い捨て着用物品。 The elastic member which solved the above-mentioned subject, the disposable wearing article which has this elastic member, and the manufacturing method of an elastic member are as follows.
<First aspect>
In the disposable wearing article comprising an elastic member having a waist part and a waist adjacent part adjacent to the waist part,
The waist portion and the waist adjacent portion in the elastic member have a first sheet layer, a second sheet layer, and an elastic sheet interposed therebetween,
The elastic sheet is continuous from the waist part to the waist adjacent part,
The first sheet layer and the second sheet layer are welded through a joint hole penetrating the elastic sheet, at a sheet joint portion arranged at intervals.
The waist portion and the waist adjacent portion in the stretchable member have a stretchable region that is stretched in the width direction and contracted in the width direction due to shrinkage of the elastic sheet,
In the stretched region of the waist part, in a deployed state, a non-perforated band in which a portion not having the bonding hole is continuous in the width direction, and a bonding band in which the sheet bonding part is arranged with an interval in the width direction Are alternately and repeatedly provided in an orthogonal direction orthogonal to the width direction,
The stretchable region of the waist adjacent portion is provided with a non-perforated band in which the portion that does not have the joint hole is continuous along the width direction in the unfolded state, and the plurality of the non-porous bands in the waist portion. The dimension in the orthogonal direction is longer than the dimension in the orthogonal direction of the non-perforated zone of the waist adjacent part, or the non-perforated zone is not provided,
A disposable wearing article characterized by the above.

（作用効果）
弾性シートを含む伸縮部材により発揮される締め付け力は弾性シートの伸長応力と接触面積によりほぼ決まり、弾性シートの伸長応力の強さは基本的に弾性シートの断面積（厚み一定であれば幅方向と直交する直交方向の寸法）で決まる。さらに、本伸縮構造では、シート接合部を有する部分では弾性シートの連続性がなくなる。そのため、本伸縮構造において伸長応力に寄与する弾性シートの断面積は基本的に無孔帯の直交方向の寸法により決まる。ここで、本伸縮構造では、ウエスト部におけるにおける複数本の無孔帯の直交方向の寸法がウエスト隣接部の無孔帯の直交方向の寸法よりも長いか、又はウエスト隣接部に無孔帯が設けられていない。したがって、本態様の使い捨て着用物品は、ウエスト部及びウエスト隣接部にわたる同一の弾性シートにより伸縮するものでありながら、ウエスト部の厚み増加なく、つまりウエスト部の弾性シートが単層（折り返しなどにより複数層になっていない）であっても、ウエスト部をより強く締め付けることができる。 (Function and effect)
The tightening force exerted by the elastic member including the elastic sheet is substantially determined by the extension stress and the contact area of the elastic sheet. The strength of the extension stress of the elastic sheet is basically the cross-sectional area of the elastic sheet (the width direction if the thickness is constant). Dimension in the orthogonal direction orthogonal to Furthermore, in this stretchable structure, the continuity of the elastic sheet is lost at the portion having the sheet joint portion. Therefore, the cross-sectional area of the elastic sheet that contributes to the elongation stress in the present stretchable structure is basically determined by the dimensions of the non-porous band in the orthogonal direction. Here, in this stretchable structure, the dimension in the orthogonal direction of the plurality of non-porous bands in the waist part is longer than the dimension in the orthogonal direction of the non-porous band in the waist adjacent part, or there is a non-porous band in the waist adjacent part. Not provided. Therefore, the disposable wearing article of this aspect is expanded and contracted by the same elastic sheet across the waist portion and the waist adjacent portion, but the waist portion does not increase in thickness. Even if it is not layered, the waist can be tightened more strongly.

＜第２の態様＞
前記弾性シートは、厚み２０〜４０μｍの弾性フィルムであり、
前記ウエスト部における複数本の無孔帯の前記直交方向の寸法が２〜５ｍｍであり、
前記ウエスト隣接部の無孔帯の前記直交方向の寸法は、前記ウエスト部における複数本の無孔帯の前記直交方向の寸法の０．２５倍以下であるか、又は、前記ウエスト隣接部に前記無孔帯が設けられていない、
第１の態様の使い捨て着用物品。 <Second aspect>
The elastic sheet is an elastic film having a thickness of 20 to 40 μm,
The dimension in the orthogonal direction of the plurality of non-porous bands in the waist is 2 to 5 mm,
The dimension in the orthogonal direction of the non-perforated zone of the waist adjacent part is 0.25 times or less the dimension in the orthogonal direction of the plurality of non-perforated bands in the waist part, or the waist adjacent part has the No perforated zone is provided,
The disposable wearing article according to the first aspect.

（作用効果）
ウエスト部の無孔帯の直交方向の寸法は特に限定されてないが、弾性シートが本態様のような厚みの弾性フィルムである場合、ウエスト部における複数本の無孔帯の直交方向の寸法等は本態様の範囲内であることが好ましい。 (Function and effect)
The dimension in the orthogonal direction of the non-porous band of the waist part is not particularly limited, but when the elastic sheet is an elastic film having a thickness as in this embodiment, the dimension in the orthogonal direction of a plurality of non-porous bands in the waist part, etc. Is preferably within the scope of this embodiment.

＜第３の態様＞
前記ウエスト部の接合帯に位置する前記接合孔は、自然長状態の形状が、前記幅方向に細長く、かつ上縁及び下縁が直線状の形状である、
第１又は２の態様の使い捨て着用物品。 <Third Aspect>
The joint hole located in the joint band of the waist part has a natural length shape that is elongated in the width direction, and an upper edge and a lower edge are linear shapes.
The disposable wearing article according to the first or second aspect.

（作用効果）
接合孔の形状は特に限定されるものではないが、本伸縮構造では、同じ弾性シートの使用面積で比較した場合、接合孔の直交方向の寸法が短いほど、ウエスト部の締め付け力を強くすることができるため好ましい。また、この場合、第１シート層及び第２シート層を広範囲にわたり接合しつつ、シート接合部４０の面積を小さくすることができ、柔軟性及び通気性に優れるようになる。 (Function and effect)
The shape of the joint hole is not particularly limited, but in this stretchable structure, when compared with the use area of the same elastic sheet, the shorter the dimension of the joint hole in the orthogonal direction, the stronger the tightening force of the waist part. Is preferable. Further, in this case, the area of the sheet bonding portion 40 can be reduced while bonding the first sheet layer and the second sheet layer over a wide range, and the flexibility and breathability are excellent.

＜第４の態様＞
前記ウエスト部の無孔帯の前記直交方向の寸法が、ウエスト開口の縁に近づくにつれて長くなっている、
第１〜３のいずれか１つの態様の使い捨て着用物品。 <Fourth aspect>
The dimension in the orthogonal direction of the non-perforated band of the waist part becomes longer as it approaches the edge of the waist opening,
The disposable wearing article according to any one of the first to third aspects.

（作用効果）
本態様では、ウエスト部の縁に近いほど肌との密着性が高くなるため、ウエスト部の密着性を重視する場合に好適である。 (Function and effect)
In this aspect, the closer to the edge of the waist portion, the higher the adhesiveness with the skin, which is suitable when importance is attached to the adhesiveness of the waist portion.

＜第５の態様＞
前記ウエスト部の無孔帯の前記直交方向の寸法が、ウエスト開口の縁に近づくにつれて短くなっている、
第１〜３のいずれか１つの態様の使い捨て着用物品。 <Fifth aspect>
The dimension in the orthogonal direction of the non-perforated belt of the waist portion is shortened as it approaches the edge of the waist opening,
The disposable wearing article according to any one of the first to third aspects.

（作用効果）
本態様では、ウエスト部の縁に近いほど締め付け力が弱くなるため、装着状態でウエスト部と肌との間に簡単に指を入れて使い捨て着用物品をつかむことができる。よって、例えばパンツタイプ使い捨て着用物品であれば、装着状態でウエスト部を容易につかむことができ、パンツタイプ使い捨ておむつの上げ下ろし作業が容易になる。 (Function and effect)
In this aspect, the closer to the edge of the waist portion, the weaker the tightening force, so that the disposable wearing article can be grasped by simply putting a finger between the waist portion and the skin in the mounted state. Therefore, for example, if it is an underpants type disposable wearing article, a waist part can be easily grasped in the wearing state, and the raising and lowering work of the underpants type disposable diaper becomes easy.

＜第６の態様＞
前記ウエスト部の無孔帯の前記直交方向の寸法が、前記ウエスト部の幅方向の中間ではウエスト開口の縁に近づくにつれて長くなり、これよりも幅方向の外側ではウエスト開口の縁に近づくにつれて短くなっている、
第１〜３のいずれか１つの態様の使い捨て着用物品。 <Sixth aspect>
The dimension in the orthogonal direction of the non-perforated belt of the waist portion becomes longer as it approaches the edge of the waist opening in the middle of the width direction of the waist portion, and becomes shorter as it approaches the edge of the waist opening than in the width direction. Has become,
The disposable wearing article according to any one of the first to third aspects.

（作用効果）
本態様では、ウエスト部の無孔帯の直交方向の寸法が、幅方向の位置により変化する。ここで、本態様における、無孔帯の直交方向の寸法が長い部分は弾性シートの面積が大きくなるものの、その幅方向の少なくとも一方は直交方向の寸法が短いため、締め付け力としては弱くなる。この結果、本態様では、腹部を締め付ける部分ではウエスト部の縁に近いほど締め付け力が弱くなり、腸骨に接する部分ではウエスト部の縁から遠ざかるほど締め付け力が弱くなるため、ウエスト部のフィット性がより一層良好となる。 (Function and effect)
In this aspect, the dimension in the orthogonal direction of the non-perforated band of the waist portion varies depending on the position in the width direction. Here, although the area of the elastic sheet having a long dimension in the orthogonal direction in the present embodiment has a large area of the elastic sheet, at least one of the width direction has a short dimension in the orthogonal direction, so that the tightening force becomes weak. As a result, in this aspect, the tightening force becomes weaker as it is closer to the edge of the waist part in the part that tightens the abdomen, and the tightening force becomes weaker as it gets away from the edge of the waist part in the part that comes into contact with the iliac. Is even better.

＜第７の態様＞
ウエスト部と、ウエスト部に隣接するウエスト隣接部とを有する伸縮部材を備えた、使い捨て着用物品において、
前記伸縮部材における前記ウエスト部及び前記ウエスト隣接部は、第１シート層、第２シート層、及びこれらの間に介在された弾性シートを有しており、
前記第１シート層及び第２シート層は、間隔を空けて配列されたシート接合部で、弾性シートを貫通する接合孔を通じて溶着されており、
前記伸縮部材における前記ウエスト部及び前記ウエスト隣接部は、前記弾性シートの収縮により幅方向に収縮しているとともに幅方向に伸長可能な伸縮領域を有しており、
前記ウエスト部の伸縮領域には、展開状態で、前記シート接合部を有しない部分が幅方向に沿って連続する無接合帯と、前記シート接合部が幅方向に間隔を空けて配置された接合帯とが、幅方向と直交する直交方向に交互に繰り返し設けられ、
前記ウエスト部の伸縮領域における各無接合帯には、前記弾性シートが前記直交方向に分断された弾性帯が配置され、
前記ウエスト隣接部の伸縮領域には、展開状態で、前記接合孔を有しない部分が幅方向に沿って連続する無孔帯が設けられるとともに、前記ウエスト部におけるにおける複数本の前記弾性帯の前記直交方向の寸法が、前記ウエスト隣接部の無孔帯の前記直交方向の寸法よりも長いか、又は、前記無孔帯が設けられていない、
ことを特徴とする使い捨て着用物品。 <Seventh aspect>
In the disposable wearing article comprising an elastic member having a waist part and a waist adjacent part adjacent to the waist part,
The waist portion and the waist adjacent portion in the elastic member have a first sheet layer, a second sheet layer, and an elastic sheet interposed therebetween,
The first sheet layer and the second sheet layer are welded through a joint hole penetrating the elastic sheet, at a sheet joint portion arranged at intervals.
The waist portion and the waist adjacent portion in the stretchable member have a stretchable region that is stretched in the width direction and contracted in the width direction due to shrinkage of the elastic sheet,
In the stretched region of the waist portion, in a deployed state, a non-joint band in which a portion not having the sheet joint portion is continuous along the width direction, and a joint in which the sheet joint portions are arranged at intervals in the width direction A belt is alternately and repeatedly provided in an orthogonal direction orthogonal to the width direction,
In each non-bonding band in the stretchable region of the waist part, an elastic band in which the elastic sheet is divided in the orthogonal direction is arranged,
The stretchable region of the waist adjacent portion is provided with a non-perforated band in which the portion that does not have the joint hole is continuous along the width direction in a deployed state, and the plurality of elastic bands in the waist portion The dimension in the orthogonal direction is longer than the dimension in the orthogonal direction of the non-perforated zone of the waist adjacent part, or the non-perforated zone is not provided,
A disposable wearing article characterized by the above.

（作用効果）
本第７の態様においては、ウエスト部の弾性帯は弾性シートの分断により形成されているとともに、ウエスト部における複数本の弾性帯の直交方向の寸法がウエスト隣接部の無孔帯の直交方向の寸法よりも長いか、又はウエスト隣接部に無孔帯が設けられていない。したがって、単一の弾性シートによりウエスト部及びウエスト隣接部に伸縮性が付与されるものでありながら、ウエスト部の厚み増加なく、つまり弾性シートが単層（折り返しなどにより複数層になっていない）であっても、ウエスト部をより強く締め付けることができる。さらに、弾性シートがウエスト部からウエスト隣接部にわたり連続せずに、ウエスト部の伸縮領域に弾性シートが分断された弾性帯が設けられるため、ウエスト部の外観がウエスト隣接部の外観と異なり、ウエスト部の外観を目立たせることが可能となる。 (Function and effect)
In the seventh aspect, the elastic band of the waist part is formed by dividing the elastic sheet, and the dimensions of the plurality of elastic bands in the waist part in the orthogonal direction of the non-porous band of the waist adjacent part are It is longer than the dimension or there is no non-perforated band at the waist adjoining part. Therefore, while the stretchability is imparted to the waist portion and the waist adjacent portion by a single elastic sheet, there is no increase in the thickness of the waist portion, that is, the elastic sheet is a single layer (not formed into multiple layers by folding or the like). Even so, the waist can be tightened more strongly. Furthermore, since the elastic sheet is not continuous from the waist part to the waist adjacent part and an elastic band in which the elastic sheet is divided is provided in the stretchable region of the waist part, the appearance of the waist part is different from the appearance of the waist adjacent part. It becomes possible to make the appearance of the part conspicuous.

＜第８の態様＞
前記弾性シートは、厚み２０〜４０μｍの弾性フィルムであり、
前記ウエスト部における複数本の弾性帯の前記直交方向の寸法が２〜５ｍｍであり、
前記ウエスト隣接部の無孔帯の前記直交方向の寸法は、前記ウエスト部における複数本の弾性帯の前記直交方向の寸法の０．２５倍以下であるか、又は、前記ウエスト隣接部に前記無孔帯が設けられていない、
第７の態様の使い捨て着用物品。 <Eighth aspect>
The elastic sheet is an elastic film having a thickness of 20 to 40 μm,
The dimension in the orthogonal direction of the plurality of elastic bands in the waist is 2 to 5 mm,
The dimension of the non-perforated band of the waist adjacent part in the orthogonal direction is not more than 0.25 times the dimension of the plurality of elastic bands in the waist part in the orthogonal direction, or No zonal zone,
The disposable wearing article according to the seventh aspect.

＜第９の態様＞
前身頃から後身頃にわたる一体的な外装体、又は前身頃及び後身頃に別々に設けられた外装体と、この外装体の幅方向中間部に取り付けられた、股間部の前後両側にわたる内装体と、前身頃における外装体の両側部と後身頃における外装体の両側部とがそれぞれ接合されたサイドシール部と、ウエスト開口及び左右一対の脚開口とを備えた、パンツタイプの使い捨て着用物品であって、
前記外装体が前記伸縮部材である、
第１〜８のいずれか１つの態様の使い捨て着用物品。 <Ninth aspect>
An integrated exterior body from the front body to the back body, or an exterior body provided separately for the front body and the back body, and an interior body that is attached to the middle part in the width direction of the exterior body and covers both the front and back of the crotch part The pants-type disposable wearing article comprises a side seal part in which both sides of the exterior body in the front body and both sides of the exterior body in the back body are joined, a waist opening and a pair of left and right leg openings. And
The exterior body is the elastic member;
The disposable wearing article according to any one of the first to eighth aspects.

（作用効果）
前述の伸縮部材は、本態様のように、パンツタイプの使い捨て着用物品の外装体に好適なものである。 (Function and effect)
The stretchable member described above is suitable for an exterior body of a pants-type disposable wearing article as in this embodiment.

本発明によれば、単一の弾性シートによりウエスト部及びウエスト隣接部に伸縮性が付与されるものでありながら、ウエスト部の厚み増加なく、ウエスト部をより強く締め付けることができる、等の利点がもたらされる。   According to the present invention, the elasticity can be imparted to the waist portion and the waist adjacent portion by a single elastic sheet, but the waist portion can be tightened more strongly without increasing the thickness of the waist portion. Is brought about.

展開状態のパンツタイプ使い捨ておむつの平面図（内面側）である。It is a top view (inner surface side) of the underpants type disposable diaper of a deployment state. 展開状態のパンツタイプ使い捨ておむつの平面図（外面側）である。It is a top view (outer surface side) of the underpants type disposable diaper of a deployment state. 展開状態のパンツタイプ使い捨ておむつの要部のみ示す平面図である。It is a top view which shows only the principal part of the underpants type disposable diaper of an unfolded state. （ａ）は図１のＣ−Ｃ断面図、（ｂ）は図１のＥ−Ｅ断面図である。(A) is CC sectional drawing of FIG. 1, (b) is EE sectional drawing of FIG. 図１のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 図１のＢ−Ｂ断面図である。It is BB sectional drawing of FIG. （ａ）は伸縮領域の要部平面図、（ｂ）は（ａ）のＤ−Ｄ断面図、（ｃ）は装着状態における断面図、（ｄ）は自然長状態における断面図である。(A) is a principal part top view of an expansion-contraction area | region, (b) is DD sectional drawing of (a), (c) is sectional drawing in a mounting state, (d) is sectional drawing in a natural length state. ある程度伸長した外装体の要部断面を概略的に示す断面図である。It is sectional drawing which shows roughly the principal part cross section of the exterior body extended to some extent. （ａ）は伸縮領域の要部平面図、（ｂ）は（ａ）のＤ−Ｄ断面図、（ｃ）は装着状態における断面図、（ｄ）は自然長状態における断面図である。(A) is a principal part top view of an expansion-contraction area | region, (b) is DD sectional drawing of (a), (c) is sectional drawing in a mounting state, (d) is sectional drawing in a natural length state. シート接合部の各種配列を示す平面図である。It is a top view which shows the various arrangement | sequences of a sheet | seat junction part. 展開状態の伸縮領域の平面図である。It is a top view of the expansion-contraction area | region of the unfolding state. 展開状態の伸縮領域の要部を拡大して示す平面図である。It is a top view which expands and shows the principal part of the expansion-contraction area | region of the expansion | deployment state. 自然長状態の伸縮領域の要部を拡大して示す平面図である。It is a top view which expands and shows the principal part of the expansion-contraction area | region of a natural length state. （ａ）は図１２のＤ−Ｄ断面図、（ｂ）は自然長状態における断面図である。(A) is DD sectional drawing of FIG. 12, (b) is sectional drawing in a natural length state. 展開状態の伸縮領域の平面図である。It is a top view of the expansion-contraction area | region of the unfolding state. 展開状態の伸縮領域の要部を拡大して示す平面図である。It is a top view which expands and shows the principal part of the expansion-contraction area | region of the expansion | deployment state. 自然長状態の伸縮領域の要部を拡大して示す平面図である。It is a top view which expands and shows the principal part of the expansion-contraction area | region of a natural length state. 超音波シール装置の概略図である。It is the schematic of an ultrasonic sealing apparatus. 展開状態の伸縮領域の要部を拡大して示す平面図である。It is a top view which expands and shows the principal part of the expansion-contraction area | region of the expansion | deployment state. 展開状態の伸縮領域の要部を拡大して示す平面図である。It is a top view which expands and shows the principal part of the expansion-contraction area | region of the expansion | deployment state. 展開状態の伸縮領域の要部を拡大して示す平面図である。It is a top view which expands and shows the principal part of the expansion-contraction area | region of the expansion | deployment state. 展開状態の伸縮領域の要部を拡大して示す平面図である。It is a top view which expands and shows the principal part of the expansion-contraction area | region of the expansion | deployment state. 展開状態の伸縮領域の要部を拡大して示す平面図である。It is a top view which expands and shows the principal part of the expansion-contraction area | region of the expansion | deployment state. 展開状態の伸縮領域の要部を拡大して示す平面図である。It is a top view which expands and shows the principal part of the expansion-contraction area | region of the expansion | deployment state.

以下、添付図面に示されたパンツタイプ使い捨ておむつの例に基づいて、弾性シートを含む伸縮部材を備えたい使い捨て着用物品について詳説する。なお、断面図中の点模様部分はホットメルト接着剤等の接合手段を示している。   Hereinafter, based on the example of the underpants type disposable diaper shown by the accompanying drawing, it explains in full detail about the disposable wearing article which wants to provide the elastic member containing an elastic sheet. In addition, the dotted pattern part in sectional drawing has shown joining means, such as a hot-melt-adhesive.

図１〜図６は、パンツタイプ使い捨ておむつを示している。符号ＬＤ（縦方向）は前後方向を、ＷＤは幅方向を示している。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、前身頃Ｆ及び後身頃Ｂをなす外装体２０と、この外装体２０の内面に固定され一体化された内装体１０とを有しており、内装体１０は液透過性のトップシート１１と液不透過性シート１２との間に吸収体１３が介在されてなるものである。製造に際しては、外装体２０の内面（上面）に対して内装体１０の裏面がホットメルト接着剤などの接合手段によって接合された後に、内装体１０及び外装体２０が前身頃Ｆ及び後身頃Ｂの境界である前後方向ＬＤ（縦方向）の中央で折り畳まれ、その両側部が相互に熱溶着又はホットメルト接着剤などによって接合されてサイドシール部２１が形成されることによって、ウエスト開口及び左右一対の脚開口が形成されたパンツタイプ使い捨ておむつとなる。   1-6 has shown the underpants type disposable diaper. Symbol LD (vertical direction) indicates the front-rear direction, and WD indicates the width direction. This pants-type disposable diaper (hereinafter also simply referred to as a diaper) has an exterior body 20 that forms a front body F and a back body B, and an interior body 10 that is fixed to and integrated with the inner surface of the exterior body 20. The interior body 10 is formed by interposing an absorber 13 between a liquid-permeable top sheet 11 and a liquid-impermeable sheet 12. In manufacturing, after the back surface of the interior body 10 is joined to the inner surface (upper surface) of the exterior body 20 by a joining means such as a hot melt adhesive, the interior body 10 and the exterior body 20 are the front body F and the back body B. Is folded at the center of the front-rear direction LD (longitudinal direction) that is the boundary of the two sides, and both side portions thereof are joined to each other by heat welding or hot melt adhesive to form the side seal portion 21, thereby forming the waist opening and the left and right sides. The pants-type disposable diaper is formed with a pair of leg openings.

（内装体の構造例）
内装体１０は、図４〜図６に示すように、トップシート１１と、ポリエチレン等からなる液不透過性シート１２との間に、吸収体１３を介在させた構造を有しており、トップシート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１に示されるようにほぼ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 inner body 10 has a structure in which an absorber 13 is interposed between a top sheet 11 and a liquid-impermeable sheet 12 made of polyethylene or the like. The excretory fluid that has passed through the sheet 11 is absorbed and retained. Although the planar shape of the interior body 10 is not particularly limited, it is generally a rectangular shape as shown in FIG.

吸収体１３の表側（肌側）を覆うトップシート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。ここで、トップシート１１を含め、本物品に使用可能な不織布は以下のとおりである。すなわち、不織布の構成繊維としては、例えばポリエチレン、ポリプロピレン又はそのコポリマー（例えばポリエチレンや、エチレンを共重合成分として配合したコポリマー）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（単成分繊維の他、芯鞘等の複合繊維も含む）の他、レーヨンやキュプラ等の再生繊維、綿等の天然繊維等、特に限定なく選択することができ、これらを混合して用いることもできる。不織布の柔軟性を高めるために、構成繊維を捲縮繊維とするのは好ましい。また、不織布の構成繊維は、親水性繊維（親水化剤により親水性となった疎水性繊維を含む）であっても、疎水性繊維若しくは撥水性繊維（撥水剤により撥水性となった撥水性繊維を含む）であってもよい。また、不織布は一般に繊維の長さや、シート形成方法、繊維結合方法、積層構造により、短繊維不織布、長繊維不織布、スパンボンド不織布、メルトブローン不織布、スパンレース不織布、サーマルボンド（エアスルー）不織布、ニードルパンチ不織布、ポイントボンド不織布、積層不織布（スパンボンド層間にメルトブローン層を挟んだＳＭＳ不織布、ＳＭＭＳ不織布等）等に分類されるが、これらのどの不織布も用いることができる。   As the top sheet 11 covering the front side (skin side) of the absorbent body 13, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. Here, the nonwoven fabric which can be used for this article including the top sheet 11 is as follows. That is, as the constituent fiber of the nonwoven fabric, for example, olefin-based, such as polyethylene, polypropylene or a copolymer thereof (for example, polyethylene or a copolymer blended with ethylene as a copolymerization component), polyester-based, polyamide-based synthetic fiber (single component fiber) In addition, composite fibers such as core and sheath), regenerated fibers such as rayon and cupra, natural fibers such as cotton, and the like can be selected without particular limitation, and these can also be used in combination. In order to increase the flexibility of the nonwoven fabric, it is preferable that the constituent fibers are crimped fibers. Moreover, even if the constituent fiber of the nonwoven fabric is a hydrophilic fiber (including a hydrophobic fiber made hydrophilic by a hydrophilizing agent), it is a hydrophobic fiber or a water-repellent fiber (water repellent made water-repellent by a water repellent). (Including aqueous fibers). Nonwoven fabrics are generally short fiber nonwoven fabrics, long fiber nonwoven fabrics, spunbond nonwoven fabrics, meltblown nonwoven fabrics, spunlace nonwoven fabrics, thermal bond (air-through) nonwoven fabrics, needle punches, depending on fiber length, sheet formation method, fiber bonding method, and laminated structure. Nonwoven fabrics, point bond nonwoven fabrics, laminated nonwoven fabrics (SMS nonwoven fabric, SMMS nonwoven fabric, etc. having a meltblown layer sandwiched between spunbond layers) and the like can be used, and any of these nonwoven fabrics can be used.

吸収体１３の裏側（非肌当接側）を覆う液不透過性シート１２としては、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を用いることができ、特にムレ防止の点から透湿性を有するもの、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を好適に用いることができる。   As the liquid-impermeable sheet 12 that covers the back side (non-skin contact side) of the absorbent body 13, a liquid-impermeable plastic sheet such as polyethylene or polypropylene can be used. For example, a microporous sheet obtained by 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 can be suitably used.

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又は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 pile, an aggregate of filaments such as cellulose acetate, or a non-woven fabric, mixed or fixed with a superabsorbent polymer as necessary. 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を有するほぼ砂時計状に形成されている。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の平面形状がほぼ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を有しない無吸収体側部１７が形成される。   The shape of the absorber 13 is formed in a substantially hourglass shape having a narrowed portion 13N narrower than the front and rear sides at the crotch portion. 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 of having such a constricted portion 13N, if the planar shape of the interior body 10 is substantially rectangular, the interior body 10 has no absorber 13 in a portion corresponding to the constricted portion 13N of the absorber 13. Absorber side portions 17 are formed.

液不透過性シート１２は、トップシート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 sheet 12 is folded back together with the top sheet 11 on both sides in the width direction of the absorber 13. As this liquid-impermeable sheet 12, it is desirable to use an opaque sheet so that brown color 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.

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９０が形成されている。この立体ギャザー９０は、図５及び図６に示されるように、内装体１０の裏面の側部に固定された固定部９１と、この固定部９１から内装体１０の側方を経て内装体１０の表面の側部上まで延在する本体部９２と、本体部９２の前後端部が倒伏状態で内装体１０の表面（図示例ではトップシート１１）の側部にホットメルト接着剤９５ｂ等により固定されて形成された倒伏部分９３と、この倒伏部分９３間が非固定とされて形成された自由部分９４とを有している。これらの各部は、不織布などのシートを折り返して二重シートとしたギャザーシート９５により形成されている。ギャザーシート９５は、内装体１０の前後方向全体にわたり取り付けられており、倒伏部分９３は無吸収体側部１７よりも前側及び後側に設けられ、自由部分９４は無吸収体側部１７の前後両側に延在されている。また、二重のギャザーシート９５間には、自由部分の先端部等にギャザー弾性部材９６が配設されている。ギャザー弾性部材９６は、製品状態において図５に示すように、弾性収縮力により自由部分９４を立ち上げるためのものである。   Solid gathers 90 that fit around the legs are formed on both sides of the interior body 10. As shown in FIGS. 5 and 6, the three-dimensional gather 90 includes a fixing portion 91 fixed to the side portion of the back surface of the interior body 10, and the interior body 10 through the side of the interior body 10 from the fixing portion 91. The main body 92 extending to the side of the surface of the inner surface, and the front and rear ends of the main body 92 are in a lying state with a hot melt adhesive 95b or the like on the side of the surface of the interior body 10 (the top sheet 11 in the illustrated example). It has the fall part 93 formed by being fixed, and the free part 94 formed by making the space between the fall parts 93 non-fixed. Each of these parts is formed of a gather sheet 95 which is a double sheet obtained by folding a sheet such as a nonwoven fabric. The gather sheet 95 is attached over the entire front-rear direction of the interior body 10, the lying portion 93 is provided on the front side and the rear side of the non-absorbent body side portion 17, and the free portion 94 is disposed on both front and rear sides of the non-absorbent body side portion 17. Has been extended. Further, a gather elastic member 96 is disposed between the double gather sheets 95 at the tip of the free part. As shown in FIG. 5, the gather elastic member 96 is for raising the free portion 94 by elastic contraction force as shown in FIG.

ギャザー弾性部材９６及びギャザーシート９５の固定構造は特に限定されず、例えば図５及び図６に示す例のように、倒伏部分９３以外ではギャザー弾性部材９６の位置のホットメルト接着剤を介して、ギャザー弾性部材９６がギャザーシート９５に接着固定されるとともに、ギャザーシート９５の対向面が接合されているものの、倒伏部分９３では、ギャザー弾性部材９６の位置にホットメルト接着剤が無く、したがってギャザー弾性部材９６とギャザーシート９５とが接着されておらず、ギャザー弾性部材９６を有する位置でギャザーシート９５の対向面が接合されていない構造を採用することができる。   The fixing structure of the gather elastic member 96 and the gather sheet 95 is not particularly limited. For example, as in the example shown in FIGS. 5 and 6, the hot spring adhesive at the position of the gather elastic member 96 other than the lying portion 93 is used. Although the gather elastic member 96 is bonded and fixed to the gather sheet 95 and the opposing surfaces of the gather sheet 95 are joined, there is no hot melt adhesive at the position of the gather elastic member 96 in the lying portion 93, and therefore the gather elasticity. It is possible to adopt a structure in which the member 96 and the gather sheet 95 are not bonded, and the opposing surfaces of the gather sheet 95 are not joined at the position where the gather elastic member 96 is provided.

ギャザー弾性部材９６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９６としては、図示例のような細長状の他、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。   As the gather elastic member 96, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, and polyester that are usually used can be used. 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. As the gather elastic member 96, a tape-like member having a certain width can be used in addition to an elongated shape as shown in the drawing.

ギャザーシート９５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。   Gather sheet 95 is coated with a silicone, paraffin metal, alkylchromic chloride water repellent, etc. to prevent urine from penetrating, to prevent fogging, and to improve skin feel (dry feeling). It is desirable to use a water-repellent treated nonwoven fabric.

図３〜図６に示すように、内装体１０はその裏面が、内外固定領域１０Ｂ（斜線領域）において、外装体２０の内面に対してホットメルト接着剤等により接合される。この内外固定領域１０Ｂは、適宜定めることができ、内装体１０の幅方向ＷＤのほぼ全体とすることもできるが、幅方向両端部は外装体２０に固定しないことが好ましい。   As shown in FIGS. 3 to 6, the back surface of the interior body 10 is joined to the inner surface of the exterior body 20 by a hot melt adhesive or the like in the inner / outer fixing region 10 </ b> B (shaded region). The inner / outer fixing region 10B can be determined as appropriate and can be substantially the entire width direction WD of the interior body 10, but it is preferable that both ends in the width direction are not fixed to the exterior body 20.

（外装体の構造例）
外装体２０は少なくとも前身頃Ｆの胴周り部Ｔ及び後身頃Ｂの胴周り部Ｔを有するものであり、図示例では前身頃Ｆの胴周り部Ｔ及び後身頃Ｂの胴周り部Ｔの間の前後方向範囲である中間部Ｌをさらに有するものとなっている。胴周り部Ｔは、サイドシール部２１を有する前後方向範囲である。胴周り部Ｔは、ウエスト開口の縁部を形成するウエスト部２３を有する。前身頃Ｆのウエスト部２３及び後身頃Ｂのウエスト部２３の少なくとも一方に隣接する部分がウエスト隣接部２２である。通常、胴周り部Ｔ内に幅方向ＷＤの伸長応力（伸長時の収縮力）が変化する境界を有する場合は、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１３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。これらの直交方向ＸＤの寸法さは、製品のサイズによって異なり、適宜定めることができるが、一例を挙げると、ウエスト部２３の直交方向ＸＤの寸法は２０〜４０ｍｍとすることができる。また、中間部Ｌの両側縁は被着者の脚周りに沿うようにコ字状又は曲線状に括れており、ここが装着者の脚周りに沿う部分となる。外装体２０は図示例のように股間部において外装体２０の側縁が内装体１０の側縁より幅方向中央側に位置していても、また幅方向外側に位置していても良い。 (External body structure example)
The exterior body 20 has at least a waist part T of the front body F and a waist part T of the back body B. In the illustrated example, the exterior body 20 is located between the waist part T of the front body F and the waist part T of the back body B. It further has an intermediate portion L which is a range in the front-rear direction. The trunk periphery T is a front-rear direction range having the side seal portion 21. The trunk periphery T has a waist portion 23 that forms the edge of the waist opening. A portion adjacent to at least one of the waist portion 23 of the front body F and the waist portion 23 of the back body B is a waist adjacent portion 22. Normally, when the waist circumference portion T has a boundary where the stretching stress in the width direction WD (the contraction force when stretched) changes, the waist opening side is the waist portion 23 rather than the boundary on the waist opening side, and such a boundary When there is not, the waist opening side becomes the waist part 23 rather than the absorber 13 or the interior body 10. The dimensions in the orthogonal direction XD vary depending on the size of the product and can be determined as appropriate. For example, the dimension in the orthogonal direction XD of the waist 23 can be 20 to 40 mm. Further, both side edges of the intermediate portion L are bounded in a U-shape or a curved shape so as to follow the circumference of the wearer's leg, and this is a portion along the circumference of the wearer's leg. As shown in the illustrated example, the outer body 20 may have the side edge of the outer body 20 located at the center in the width direction from the side edge of the inner body 10 at the crotch portion, or may be located on the outer side in the width direction.

そして、図示例の外装体２０は、その中間部Ｌの前後方向ＬＤの中間を除いて、図２及び図４〜図６に示されるように、第１シート層２０Ａと、第２シート層２０Ｂと、これらの間に介在された弾性シート３０とを有している。つまり、外装体２０は伸縮部材となっている。また、図７及び図９等に示されるように、第１シート層２０Ａ及び第２シート層２０Ｂが、間隔を空けて配列された多数のシート接合部４０で弾性シート３０を貫通する接合孔３１を通じて接合されている。以下、この第１シート層２０Ａ、第２シート層２０Ｂ、及び弾性シート３０が積層された構造を弾性シート伸縮構造２０Ｘともいう。   And the exterior body 20 of the example of an illustration remove | excludes the middle of the front-back direction LD of the intermediate part L, and as FIG.2 and FIG.4-6 shows, it is the 1st sheet layer 20A and the 2nd sheet layer 20B. And an elastic sheet 30 interposed therebetween. That is, the exterior body 20 is an elastic member. Further, as shown in FIGS. 7 and 9, the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B are joined through holes 31 that penetrate the elastic sheet 30 with a large number of sheet joints 40 arranged at intervals. Are joined through. Hereinafter, the structure in which the first sheet layer 20A, the second sheet layer 20B, and the elastic sheet 30 are laminated is also referred to as an elastic sheet stretchable structure 20X.

外装体２０の平面形状は、中間部Ｌの幅方向両側縁２９がそれぞれ脚開口を形成するように中間部Ｌが括れている（中間部Ｌの幅が胴周り部Ｔの幅よりも狭くなっている）。外装体２０は、前身頃Ｆ及び後身頃Ｂで個別に形成し、両者が股間部でおむつの前後方向ＬＤに離間するように配置しても良い。   The planar shape of the exterior body 20 is such that the intermediate portion L is constricted so that both side edges 29 in the width direction of the intermediate portion L form leg openings (the width of the intermediate portion L is narrower than the width of the waist portion T). ing). The exterior body 20 may be formed separately for the front body F and the back body B, and both may be arranged so as to be separated in the front-rear direction LD of the diaper at the crotch portion.

弾性シート伸縮構造２０Ｘは、前後のウエスト部２３及びこれらの間に位置する部分のうち、ウエスト部２３からウエスト隣接部２２にかけて続く限り、ウエスト隣接部２２の一部には設けなくてもよい。例えば、図示例の外装体２０のように、中間部Ｌの前後方向ＬＤの中間のみ弾性シート３０を設けない構造としたり、中間部Ｌの全体にわたり弾性シート３０を設けない構造としたり、胴周り部Ｔの股間側の一部に弾性シート３０を設けない構造としたりすることができる。もちろん、中間部Ｌを含めて外装体２０の全体にわたり弾性シート伸縮構造２０Ｘが続いていてもよい。   The elastic sheet expansion / contraction structure 20 </ b> X may not be provided in a part of the waist adjacent portion 22 as long as it continues from the waist portion 23 to the waist adjacent portion 22 among the front and rear waist portions 23 and the portions located therebetween. For example, like the exterior body 20 in the illustrated example, a structure in which the elastic sheet 30 is not provided only in the middle in the front-rear direction LD of the intermediate part L, a structure in which the elastic sheet 30 is not provided over the entire intermediate part L, A structure in which the elastic sheet 30 is not provided in part of the crotch side of the portion T can be employed. Of course, the elastic sheet expansion / contraction structure 20 </ b> X may continue throughout the exterior body 20 including the intermediate portion L.

（シート接合部の接合構造）
シート接合部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、弾性シート３０に形成された接合孔３１を通じて接合される場合、少なくともシート接合部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、第１シート層２０Ａ及び第２シート層２０Ｂは弾性シート３０と接合されていないことが望ましい。 (Sheet joint structure)
When the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B are bonded to each other in the sheet bonding portion 40 through the bonding holes 31 formed in the elastic sheet 30, at least the first sheet layer 20 </ b> A and the second sheet layer 20 in the sheet bonding portion 40. It is desirable that the first sheet layer 20A and the second sheet layer 20B are not joined to the elastic sheet 30 except between the sheet layers 20B.

シート接合部４０において第１シート層２０Ａ及び第２シート層２０Ｂが弾性シート３０の接合孔３１を通じて溶着される場合、シート接合部４０において第１シート層２０Ａ及び第２シート層２０Ｂの両方が溶融固化していても、シート接合部４０において第１シート層２０Ａ及び第２シート層２０Ｂのいずれか一方のみが溶融固化していてもよい。さらに、シート接合部４０内に、弾性シート３０の溶融固化物が挟まれていてもよい。   When the first sheet layer 20A and the second sheet layer 20B are welded through the bonding holes 31 of the elastic sheet 30 at the sheet bonding portion 40, both the first sheet layer 20A and the second sheet layer 20B are melted at the sheet bonding portion 40. Even if solidified, only one of the first sheet layer 20A and the second sheet layer 20B may be melted and solidified in the sheet bonding portion 40. Furthermore, the melt-solidified material of the elastic sheet 30 may be sandwiched in the sheet bonding portion 40.

第１シート層２０Ａ及び第２シート層２０Ｂは、図８（ａ）に示す例のようにシート接合部４０における厚み方向及び平面方向の全体にわたり均一に溶融固化していても、図８（ｂ）（ｃ）に点模様のグラデーションで示すように不均一に溶融固化していてもよい。例えば、第１シート層２０Ａ及び第２シート層２０Ｂは、図８（ｂ）に示す例のようにシート接合部４０の厚み方向外側ほど溶融の程度が低くてもよい。この状態には、シート接合部４０の表面で第１シート層２０Ａ及び第２シート層２０Ｂのほぼすべての繊維が溶融していない状態、シート接合部４０の表面に第１シート層２０Ａ及び第２シート層２０Ｂの溶融固化物と溶融していない繊維とが混在する状態、並びにシート接合部４０の厚み方向全体にわたり第１シート層２０Ａ及び第２シート層２０Ｂの繊維が溶融しているものの溶融の程度が変化する状態が含まれる。   Even if the first sheet layer 20A and the second sheet layer 20B are uniformly melted and solidified throughout the thickness direction and the planar direction in the sheet joining portion 40 as in the example shown in FIG. 8A, FIG. ) It may be melted and solidified non-uniformly as indicated by the dot pattern gradation in (c). For example, the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B may have a lower degree of melting toward the outer side in the thickness direction of the sheet bonding portion 40 as in the example illustrated in FIG. In this state, almost all the fibers of the first sheet layer 20A and the second sheet layer 20B are not melted on the surface of the sheet bonding portion 40, and the first sheet layer 20A and the second sheet 20A on the surface of the sheet bonding portion 40. The melted and solidified product of the sheet layer 20B and unmelted fibers are mixed, and the fibers of the first sheet layer 20A and the second sheet layer 20B are melted over the entire thickness direction of the sheet joint 40. Include states with varying degrees.

上記シート接合部４０における厚み方向の溶融の程度の変化を伴い又は伴わずに、第１シート層２０Ａ及び第２シート層２０Ｂは、図８（ｃ）に示す例のようにシート接合部４０の周縁側ほど溶融の程度が低くてもよい。この状態には、シート接合部４０の周縁部で第１シート層２０Ａ及び第２シート層２０Ｂのほぼすべての繊維が溶融していない状態（ただし、後述の弾性シート３０の溶融固化物が接着剤として介在する場合に限る）、シート接合部４０の周縁部に第１シート層２０Ａ及び第２シート層２０Ｂの溶融固化物と溶融していない繊維とが混在する状態、並びにシート接合部４０の平面方向の全体にわたり第１シート層２０Ａ及び第２シート層２０Ｂの繊維が溶融しているものの溶融の程度が変化する状態が含まれる。   The first sheet layer 20A and the second sheet layer 20B with or without a change in the degree of melting in the thickness direction in the sheet bonding portion 40 are as shown in FIG. The degree of melting may be lower toward the peripheral side. In this state, almost all the fibers of the first sheet layer 20A and the second sheet layer 20B are not melted at the peripheral edge portion of the sheet joining portion 40 (however, the melted and solidified material of the elastic sheet 30 described later is adhesive). The melted and solidified product of the first sheet layer 20A and the second sheet layer 20B and unmelted fibers are mixed in the peripheral portion of the sheet bonding portion 40, and the plane of the sheet bonding portion 40. Although the fibers of the first sheet layer 20A and the second sheet layer 20B are melted over the entire direction, a state in which the degree of melting changes is included.

なお、これらの状態において、第１シート層２０Ａ及び第２シート層２０Ｂの繊維が溶融することには、繊維全体が溶融することの他、繊維の芯（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）は溶融することが含まれる。   In these states, the fibers of the first sheet layer 20A and the second sheet layer 20B are melted by not only melting the whole fiber but also the fiber core (not only the core in the composite fiber but also the single component fiber). The center part of the composite fiber remains, but the surrounding part (including not only the sheath in the composite fiber but also the part on the surface layer side of the single component fiber) includes melting.

また、シート接合部４０内に弾性シート３０の溶融固化物が残存する状態には、第１シート層２０Ａ又はその溶融固化層と、第２シート層２０Ｂ又はその溶融固化層との間に、それらとほとんど混じらずに層状に残存する状態、第１シート層２０Ａ及び第２シート層２０Ｂのうち溶融固化するものと混じった状態、並びに第１シート層２０Ａ及び第２シート層２０Ｂの溶融固化しない方の繊維間に、又は第１シート層２０Ａ及び第２シート層２０Ｂのうち溶融固化する方における残存繊維（芯含む）間にある程度浸透した状態が含まれる。   Further, in the state in which the melted and solidified material of the elastic sheet 30 remains in the sheet joining portion 40, between the first sheet layer 20A or the melted and solidified layer thereof and the second sheet layer 20B or the melted and solidified layer thereof, A state in which the first sheet layer 20A and the second sheet layer 20B are melted and solidified, and the first sheet layer 20A and the second sheet layer 20B are not melted and solidified. In other words, a state in which some of the first sheet layer 20A and the second sheet layer 20B are permeated to some extent between the remaining fibers (including the core) is included.

シート接合部４０内に弾性シート３０の溶融固化物が残存する状態は、第１シート層２０Ａ及び第２シート層２０Ｂの少なくとも一方の融点が弾性シート３０の融点よりも高い条件下で、第１シート層２０Ａ及び第２シート層２０Ｂ間に弾性シート３０を挟み、シート接合部４０となる部位を加圧・加熱し、第１シート層２０Ａ及び第２シート層２０Ｂの少なくとも一方と弾性シート３０とを溶融することにより製造することができる。   The state in which the melted and solidified material of the elastic sheet 30 remains in the sheet joining portion 40 is the first condition under the condition that the melting point of at least one of the first sheet layer 20A and the second sheet layer 20B is higher than the melting point of the elastic sheet 30. The elastic sheet 30 is sandwiched between the sheet layer 20A and the second sheet layer 20B, and the portion to be the sheet joint portion 40 is pressurized and heated, and at least one of the first sheet layer 20A and the second sheet layer 20B and the elastic sheet 30 It can be manufactured by melting.

この場合、弾性シート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、第１シート層２０Ａ及び第２シート層２０Ｂの融点と弾性シート３０の融点との差は６０〜９０℃程度であるのが好ましい。また、加熱温度は１００〜１５０℃程度とするのが好ましい。   In this case, the melting point of the elastic sheet 30 is preferably about 80 to 145 ° C., 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 sheet 30 is preferably about 60 to 90 ° C. Moreover, it is preferable that heating temperature shall be about 100-150 degreeC.

図１８は、好適な超音波シール装置の例を示している。この超音波シール装置では、シート接合部４０の形成に際して、外面にシート接合部４０のパターンで形成した突起部６０ａを有するアンビルロール６０と超音波ホーン６１との間に、第１シート層２０Ａ、弾性シート３０及び第２シート層２０Ｂを送り込む。この際、例えば上流側の弾性シート３０の送り込み駆動ロール６３及びニップロール６２による送り込み移送速度を、アンビルロール６０及び超音波ホーン６１以降の移送速度よりも遅くすることにより、送り込み駆動ロール６３及びニップロール６２によるニップ位置からアンビルロール６０及び超音波ホーン６１によるシール位置までの経路で、弾性シート３０をＭＤ方向（マシン方向、流れ方向）に所定の伸長率まで伸長する。この弾性シート３０の伸長率は、アンビルロール６０及び送り込み駆動ロール６３の速度差を選択することにより設定することができ、例えば３００％〜５００％程度とすることができる。６２はニップロールである。   FIG. 18 shows an example of a suitable ultrasonic sealing device. In this ultrasonic sealing apparatus, when the sheet bonding portion 40 is formed, the first sheet layer 20A, between the anvil roll 60 and the ultrasonic horn 61, each having a projection 60a formed in the pattern of the sheet bonding portion 40 on the outer surface, The elastic sheet 30 and the second sheet layer 20B are fed. At this time, for example, the feeding driving speed of the upstream elastic sheet 30 by the feeding driving roll 63 and the nip roll 62 is made slower than the feeding speed of the anvil roll 60 and the ultrasonic horn 61 and thereafter, thereby feeding the feeding driving roll 63 and the nip roll 62. The elastic sheet 30 is stretched in the MD direction (machine direction, flow direction) to a predetermined stretch rate through the path from the nip position by the anvil roll 60 and the seal position by the ultrasonic horn 61. The elongation rate of the elastic sheet 30 can be set by selecting the speed difference between the anvil roll 60 and the feeding drive roll 63, and can be set to about 300% to 500%, for example. 62 is a nip roll.

アンビルロール６０と超音波ホーン６１との間に送り込まれた、第１シート層２０Ａ、弾性シート３０及び第２シート層２０Ｂは、この順に積層した状態で、突起部６０ａと超音波ホーン６１との間で加圧しつつ、超音波ホーン６１の超音波振動エネルギーにより加熱し、弾性シート３０のみを溶融するか、又は第１シート層２０Ａ及び第２シート層２０Ｂの少なくとも一方と弾性シート３０とを溶融することによって、弾性シート３０に接合孔３１を形成するのと同時に、その接合孔３１を通じて第１シート層２０Ａ及び第２シート層２０Ｂを接合する。したがって、この場合にはアンビルロール６０の突起部６０ａの大きさ、形状、離間間隔、ロール長方向及びロール周方向の配置パターンなどを選定することにより、シート接合部４０の面積率を選択することができる。   The first sheet layer 20A, the elastic sheet 30, and the second sheet layer 20B fed between the anvil roll 60 and the ultrasonic horn 61 are stacked in this order, and the protrusion 60a and the ultrasonic horn 61 are connected to each other. While being pressurized, heating is performed by the ultrasonic vibration energy of the ultrasonic horn 61, and only the elastic sheet 30 is melted, or at least one of the first sheet layer 20A and the second sheet layer 20B and the elastic sheet 30 are melted. By doing so, the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B are bonded through the bonding hole 31 simultaneously with the formation of the bonding hole 31 in the elastic sheet 30. Therefore, in this case, by selecting the size, shape, separation interval, arrangement pattern in the roll length direction and roll circumferential direction, etc., of the projections 60a of the anvil roll 60, the area ratio of the sheet joining portion 40 is selected. Can do.

接合孔３１が形成される理由は必ずしも明確ではないが、弾性シート３０におけるアンビルロール６０の突起部６０ａと対応する部分が溶融して周囲から離脱することにより開孔するものと考えられる。この際、弾性シート３０における、伸縮方向ＥＤに並ぶ隣接する接合孔３１の間の部分は、図７（ａ）（ｂ）、図９（ａ）（ｂ）、図１２及び図１３に示すように、接合孔３１により伸縮方向両側の部分から切断され、収縮方向両側の支えを失うことになるため、収縮方向と直交する方向の連続性を保ちうる範囲で、伸縮方向ＥＤと直交する方向ＬＤの中央側ほど伸縮方向中央側に釣り合うまで収縮し、接合孔３１が伸縮方向ＥＤに拡大する。   The reason why the bonding hole 31 is formed is not necessarily clear, but it is considered that the hole corresponding to the protrusion 60a of the anvil roll 60 in the elastic sheet 30 is melted and separated from the surroundings. At this time, the portion of the elastic sheet 30 between the adjacent joint holes 31 arranged in the expansion / contraction direction ED is as shown in FIGS. 7 (a) and 7 (b), FIGS. 9 (a) and 9 (b), FIG. 12 and FIG. In addition, since the joint holes 31 are cut from the portions on both sides of the expansion / contraction direction and the support on both sides of the expansion / contraction direction is lost, the direction LD orthogonal to the expansion / contraction direction ED is maintained within a range in which continuity in the direction orthogonal to the contraction direction can be maintained. The center side of the joint shrinks until it is balanced with the center side in the telescopic direction, and the joint hole 31 expands in the telescopic direction ED.

第１シート層２０Ａ及び第２シート層２０Ｂの構成材は、繊維の少なくとも一部が溶着可能な（つまり熱可塑性樹脂成分を含む）不織布であれば特に限定無く使用できる。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などや、これらの二種以上が使用された混合繊維、又はこれらの二成分以上を含む複合繊維（例えば鞘成分が溶融しやすい芯鞘型のもの）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。   The constituent material of the first sheet layer 20A and the second sheet layer 20B can be used without particular limitation as long as at least a part of the fibers can be welded (that is, includes a thermoplastic resin component). For example, olefins such as polyethylene and polypropylene, synthetic fibers such as polyesters and polyamides, mixed fibers using two or more of these, or composite fibers containing these two or more components (for example, sheath component is melted) And the like). Furthermore, the nonwoven fabric may be manufactured by any processing.

第１シート層２０Ａ及び第２シート層２０Ｂに用いる不織布の目付けは１０〜２５ｇ／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の一部又は全部は、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。例えば、図示形態のように、ウエスト部２３では、外側に位置する構成材を第２シート層２０Ｂとし、かつその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を第１シート層２０Ａとして、その間に弾性シート３０を介在させるとともに、それ以外の部分では内側に位置する構成材を第１シート層２０Ａとし、外側に位置する構成材を第２シート層２０Ｂとして、その間に弾性シート３０を介在させることができる。もちろん、前後方向ＬＤの全体にわたり第１シート層２０Ａの構成材及び第２シート層２０Ｂの構成材を個別に設け、構成材を折り返しすることなく、第１シート層２０Ａの構成材及び第２シート層２０Ｂの構成材間に弾性シート３０を介在させることもできる。 The basis weight of the nonwoven fabric used for the first sheet layer 20A and the second sheet layer 20B is preferably about 10 to 25 g / m 2 . Moreover, a part or all of the first sheet layer 20A and the second sheet layer 20B may be a pair of layers in which one material is folded and faced. For example, as shown in the figure, in the waist portion 23, the constituent material located on the outside is the second sheet layer 20B, and the folded portion 20C that is folded back to the inner surface side at the waist opening edge is the first sheet layer 20A. In the meantime, the elastic sheet 30 is interposed, and in the other portions, the constituent material positioned inside is the first sheet layer 20A, and the constituent material positioned outside is the second sheet layer 20B, and the elastic sheet 30 is interposed therebetween. Can be made. Of course, the constituent material of the first sheet layer 20A and the constituent material of the second sheet layer 20B are individually provided over the entire front-rear direction LD, and the constituent material of the first sheet layer 20A and the second sheet are not folded back. The elastic sheet 30 can also be interposed between the constituent materials of the layer 20B.

弾性シート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熱可塑性樹脂製のシートであれば、弾性（エラスティック）フィルムの他、伸縮不織布であってもよい。また、弾性シート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、幅方向ＷＤ（伸縮方向ＥＤ、ＭＤ方向）における引張強度が８〜２５Ｎ／３５ｍｍ、前後方向ＬＤ（伸縮方向と直交する方向ＸＤ、ＣＤ方向）における引張強度が５〜２０Ｎ／３５ｍｍ、幅方向ＷＤにおける引張伸度が４５０〜１０５０％、及び前後方向ＬＤにおける引張伸度が４５０〜１４００％の弾性シート３０であると好ましい。弾性シート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。   The elastic sheet 30 is not particularly limited, and may be a stretchable nonwoven fabric in addition to an elastic (elastic) film as long as it is a sheet made of a thermoplastic resin that itself has elasticity. Further, as the elastic sheet 30, in addition to a non-porous sheet, a sheet in which a large number of holes and slits are formed for ventilation can be used. In particular, the tensile strength in the width direction WD (stretch direction ED, MD direction) is 8 to 25 N / 35 mm, the tensile strength in the front-rear direction LD (direction XD, CD direction orthogonal to the stretch direction) is 5 to 20 N / 35 mm, width direction. The elastic sheet 30 preferably has a tensile elongation in the WD of 450 to 1050% and a tensile elongation in the front-rear direction LD of 450 to 1400%. The thickness of the elastic sheet 30 is not particularly limited, but is preferably about 20 to 40 μm.

（伸縮領域）
外装体２０における弾性シート伸縮構造２０Ｘを有する領域は、ウエスト部２３及びウエスト隣接部２２が、弾性シート３０の収縮により幅方向に収縮しているとともに幅方向に伸長可能である（つまり伸縮方向ＥＤがおむつの幅方向ＷＤとなる）伸縮領域８０を有している。伸縮領域８０では、弾性シート３０の収縮力により幅方向ＷＤに収縮しているとともに、幅方向ＷＤに伸長可能となっている。より具体的には、弾性シート３０を幅方向ＷＤに伸長した状態で、幅方向ＷＤ及びこれと直交する直交方向ＸＤにそれぞれ間隔を空けて、弾性シート３０の接合孔３１を介して第１シート層２０Ａ及び第２シート層２０Ｂを接合し、多数のシート接合部４０を形成することにより、弾性シート伸縮構造２０Ｘを形成するとともに、伸縮領域８０では弾性シート３０が幅方向ＷＤに途切れずに残り、かつこの弾性シート３０の収縮力により第１シート層２０Ａ及び第２シート層２０Ｂが収縮して収縮襞２５が形成されるようにシート接合部４０を配置することによって、このような伸縮性を付与することができる。 (Elastic area)
In the region having the elastic sheet expansion / contraction structure 20X in the exterior body 20, the waist portion 23 and the waist adjacent portion 22 are contracted in the width direction due to contraction of the elastic sheet 30, and can be expanded in the width direction (that is, the expansion / contraction direction ED). (It becomes the width direction WD of a diaper). In the stretchable region 80, the elastic sheet 30 is contracted in the width direction WD by the contraction force of the elastic sheet 30, and can be expanded in the width direction WD. More specifically, in a state where the elastic sheet 30 is extended in the width direction WD, the first sheet is interposed via the joint hole 31 of the elastic sheet 30 with an interval between the width direction WD and the orthogonal direction XD orthogonal thereto. The elastic sheet stretchable structure 20X is formed by joining the layer 20A and the second sheet layer 20B to form a large number of sheet joint portions 40, and the elastic sheet 30 remains uninterrupted in the width direction WD in the stretchable region 80. In addition, by arranging the sheet joint portion 40 so that the first sheet layer 20A and the second sheet layer 20B are contracted by the contraction force of the elastic sheet 30 to form the contraction ridge 25, such stretchability is achieved. Can be granted.

ウエスト隣接部２２における伸縮領域８０では、図７及び図９に示す例のように弾性シート３０が（つまり接合孔３１を有しない部分が）幅方向ＷＤに沿って直線的に連続する無孔帯３２を有していても、図１１に示す例及び図１５に示す例のように有していなくてもよい。   In the stretchable region 80 in the waist adjacent portion 22, as in the examples shown in FIGS. 7 and 9, the elastic sheet 30 (that is, the portion not having the joint hole 31) is linearly continuous along the width direction WD. Even if it has 32, it does not need to have like the example shown in FIG. 11, and the example shown in FIG.

伸縮領域８０は、自然長状態では、図７（ｄ）、図９（ｄ）及び図１４（ｂ）に示すように、シート接合部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、直交方向ＸＤに延びる収縮襞２５が形成され、幅方向ＷＤにある程度伸長した装着状態でも、収縮襞２５は伸ばされるものの、残るようになっている。また、図示形態のように、第１シート層２０Ａ及び第２シート層２０Ｂは、少なくともシート接合部４０における第１シート層２０Ａ及び第２シート層２０Ｂ間以外では弾性シート３０と接合されていないと、装着状態を想定した図７（ｃ）、図９（ｃ）、及び、第１シート層２０Ａ及び第２シート層２０Ｂの展開状態を想定した図７（ａ）（ｂ）、図９（ａ）（ｂ）からも分かるように、これらの状態では、弾性シート３０における接合孔３１と、シート接合部４０との間に隙間が形成され、弾性シート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。特に、弾性シート３０が幅方向ＷＤに沿って直線的に連続する無孔帯３２を有している場合には、自然長状態では、弾性シート３０のさらなる収縮により接合孔３１がすぼまり、接合孔３１とシート接合部４０との間に隙間がほとんど形成されない形態となり、弾性シート３０が幅方向ＷＤに沿って直線的に連続する部分を有していない場合には、接合孔３１とシート接合部４０との間に隙間が残る。   In the natural length state, the stretchable region 80 has a first sheet layer 20A and a second sheet layer 20B between the sheet joining portions 40, as shown in FIGS. 7D, 9D, and 14B. A shrinking fold 25 is formed which swells in a direction away from each other and extends in the orthogonal direction XD, and the shrinking fold 25 is stretched but remains even in a mounted state where it extends to some extent in the width direction WD. Further, as illustrated, the first sheet layer 20A and the second sheet layer 20B are not bonded to the elastic sheet 30 except at least between the first sheet layer 20A and the second sheet layer 20B in the sheet bonding portion 40. 7 (c), 9 (c) assuming the mounted state, and FIGS. 7 (a) (b), 9 (a) assuming the unfolded state of the first sheet layer 20A and the second sheet layer 20B. As can be seen from (b), in these states, a gap is formed between the joining hole 31 in the elastic sheet 30 and the sheet joining portion 40, and the material of the elastic sheet 30 is a non-porous film or sheet. Even if it exists, air permeability is added by this clearance gap. In particular, when the elastic sheet 30 has a non-porous band 32 that is linearly continuous along the width direction WD, in the natural length state, the joint hole 31 is sunk due to further contraction of the elastic sheet 30, When the gap is hardly formed between the bonding hole 31 and the sheet bonding portion 40 and the elastic sheet 30 does not have a linearly continuous portion along the width direction WD, the bonding hole 31 and the sheet A gap remains between the joint 40.

伸縮領域８０の幅方向ＷＤの最大伸びは１９０％以上（好ましくは２００〜２２０％）とすることが望ましい。伸縮領域８０の最大伸びは、製造時の弾性シート３０の伸長率によってほぼ決まるがこれを基本として、幅方向ＷＤの収縮を阻害する要因により低下する。このような阻害要因の主なものは、幅方向ＷＤにおいて単位長さ当たりに占めるシート接合部４０の長さＬの割合であり、この割合が大きくなるほど最大伸びが低下する。通常の場合、シート接合部４０の長さＬはシート接合部４０の面積率と相関があるため、伸縮領域８０の最大伸びはシート接合部４０の面積率により調整できる。   The maximum elongation in the width direction WD of the stretchable region 80 is desirably 190% or more (preferably 200 to 220%). Although the maximum elongation of the stretchable region 80 is substantially determined by the stretch rate of the elastic sheet 30 at the time of manufacture, the maximum stretch is reduced by a factor that inhibits the contraction in the width direction WD. The main factor of such inhibition is the ratio of the length L of the sheet bonding portion 40 per unit length in the width direction WD, and the maximum elongation decreases as this ratio increases. In a normal case, since the length L of the sheet bonding portion 40 has a correlation with the area ratio of the sheet bonding portion 40, the maximum elongation of the stretchable region 80 can be adjusted by the area ratio of the sheet bonding portion 40.

伸縮領域８０の伸長応力は、図７及び図９に示す例のように、弾性シート３０が幅方向ＷＤに沿って直線的に連続する無孔帯３２を有している場合には、主に弾性シート３０が幅方向ＷＤに沿って直線的に連続する無孔帯３２（図７（ａ）及び図９（ａ）参照）の直交方向寸法３２ｗの総和（接合孔の間隔３１ｄに等しい）により調整することができる。一方、図１１に示す例及び図１５に示す例のように、弾性シート３０が幅方向ＷＤに沿って直線的に連続する部分を有していない場合には、無接合帯５１，５２の連続方向と伸縮方向ＥＤとがなす交差角度により調整でき、通常の場合、展開状態で無接合帯５１，５２の連続方向と伸縮方向ＥＤとがなす鋭角側交差角θ１，θ２がそれぞれ０度より大きく４５度以下、特に１０〜３０度の範囲とすることが好ましい。   When the elastic sheet 30 has a non-porous band 32 that is linearly continuous along the width direction WD as in the example shown in FIGS. Due to the sum of the orthogonal dimensions 32w of the non-porous band 32 (see FIGS. 7A and 9A) in which the elastic sheet 30 continues linearly along the width direction WD (equal to the bonding hole interval 31d). Can be adjusted. On the other hand, when the elastic sheet 30 does not have a linearly continuous portion along the width direction WD as in the example shown in FIG. 11 and the example shown in FIG. Can be adjusted by the crossing angle formed by the direction and the expansion / contraction direction ED. In normal cases, the acute angle side crossing angles θ1 and θ2 formed by the continuous direction of the non-joint bands 51 and 52 and the expansion / contraction direction ED in the unfolded state are each greater than 0 degree. It is preferable to set it in the range of 45 degrees or less, particularly 10 to 30 degrees.

伸縮領域８０におけるシート接合部４０の面積率及び個々のシート接合部４０の面積は適宜定めることができるが、通常の場合、次の範囲内とするのが好ましい。
シート接合部４０の面積：０．１４〜３．５ｍｍ2（特に０．１４〜１．０ｍｍ2）
シート接合部４０の面積率：１．８〜１９．１％（特に１．８〜１０．６％） The area ratio of the sheet bonding portion 40 and the area of each sheet bonding portion 40 in the stretchable region 80 can be determined as appropriate, but in the normal case, it is preferably within the following range.
Area of sheet joint 40: 0.14 to 3.5 mm 2 (particularly 0.14 to 1.0 mm 2 )
Area ratio of sheet joint portion 40: 1.8 to 19.1% (particularly 1.8 to 10.6%)

このように、伸縮領域８０の最大伸び及び伸長応力はシート接合部４０の面積により調整できるため、図１及び図２に示すように、伸縮領域８０内にシート接合部４０の面積率が異なる複数の領域を設け、部位に応じてフィット性を変化させることができる。図１及び図２に示す形態では、脚開口の縁部領域８２は、それ以外の領域と比べてシート接合部４０の面積率が高く、したがって伸長応力が弱く、柔軟に伸縮する領域となっている。   As described above, since the maximum elongation and elongation stress of the stretchable region 80 can be adjusted by the area of the sheet joining portion 40, a plurality of area ratios of the sheet joining portion 40 in the stretchable region 80 are different as shown in FIGS. This area can be provided, and the fit can be changed according to the site. In the form shown in FIGS. 1 and 2, the edge region 82 of the leg opening has a higher area ratio of the sheet joint portion 40 than the other regions, and therefore has a low elongation stress and is a region that flexibly expands and contracts. Yes.

個々のシート接合部４０及び接合孔３１の自然長状態での形状は、適宜定めることができるが、真円形、楕円形、三角形、長方形、ひし形等の多角形、あるいは凸レンズ形、凹レンズ形、星形、雲形等、任意の形状とすることができる。個々のシート接合部の寸法は特に限定されないが、最大長さ４０ｙ（接合孔３１の直交方向の寸法３１ｙにほぼ等しい）は０．５〜３．０ｍｍ、特に０．７〜１．１ｍｍとするのが好ましく、最大幅４０ｘは０．１〜３．０ｍｍ、特に伸縮方向と直交する方向ＸＤに長い形状の場合には０．１〜１．１ｍｍとするのが好ましい。   The shapes of the individual sheet joint portions 40 and the joint holes 31 in the natural length state can be determined as appropriate, but may be a perfect circle, an ellipse, a polygon such as a triangle, a rectangle, a rhombus, a convex lens, a concave lens, or a star. The shape may be any shape such as a shape or a cloud shape. The dimensions of the individual sheet joint portions are not particularly limited, but the maximum length 40y (approximately equal to the dimension 31y in the orthogonal direction of the joint hole 31) is 0.5 to 3.0 mm, particularly 0.7 to 1.1 mm. The maximum width 40x is preferably 0.1 to 3.0 mm, particularly 0.1 to 1.1 mm in the case of a shape that is long in the direction XD orthogonal to the expansion and contraction direction.

個々のシート接合部４０の大きさは、適宜定めれば良いが、大きすぎるとシート接合部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、個々のシート接合部４０の面積は０．１４〜３．５ｍｍ2程度とすることが好ましい。個々の接合孔３１の開口の面積は、接合孔３１を介してシート接合部が形成されるためシート接合部以上であれば良いが、シート接合部の面積の１〜１．５倍程度とすることが好ましい。なお、接合孔３１の開口の面積は、弾性フィルム３０単独の状態ではなく第１シート層２０Ａ及び第２シート層２０Ｂと一体化した状態で、かつ自然長の状態における値を意味し、接合孔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 sheet bonding portion 40 may be determined as appropriate. However, if the size is too large, the hardness of the sheet bonding portion 40 has an effect on the touch. If the size is too small, the bonding area is small and the materials are sufficiently bonded to each other. Since it becomes impossible, it is preferable that the area of each sheet | seat junction part 40 shall be about 0.14-3.5 mm < 2 > normally. The area of the opening of each joint hole 31 may be equal to or greater than the sheet joint part because the sheet joint part is formed through the joint hole 31, but is about 1 to 1.5 times the area of the sheet joint part. It is preferable. In addition, the area of the opening of the joining hole 31 means a value in a state of being integrated with the first sheet layer 20A and the second sheet layer 20B, and not in a state of the elastic film 30 alone, and in a natural length state. When the area of the opening 31 is not uniform in the thickness direction, such as when the elastic film 30 is different from the front and back, it means the minimum value.

ウエスト隣接部２２におけるシート接合部４０及び接合孔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１０（ａ）に示すような斜方格子状や、図１０（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１０（ｃ）に示すような正方格子状、図１０（ｄ）に示すような矩形格子状、図１０（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、シート接合部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。   The plane arrangement of the sheet joint portion 40 and the joint hole 31 in the waist adjacent portion 22 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. Hexagonal lattice shape as shown in FIG. 10 (b) (these are also called zigzag shapes), square lattice shape as shown in FIG. 10 (c), rectangular lattice shape as shown in FIG. 10 (d), FIG. ), Etc. (a form in which two groups of parallel diagonal rows intersect each other as shown in the figure), etc. (they are less than 90 degrees with respect to the expansion / contraction direction) In addition to what is repeated regularly (including those inclined at an angle), the group of sheet joints 40 (group unit arrangement may be regular or irregular, and may be a pattern, a character, etc.) Can also be repeated

ウエスト隣接部２２におけるシート接合部４０の配列パターンは、図９に示す例、図１１に示す例及び図１５に示す例のようなものであると好ましい。すなわち、これらの例では、伸縮領域８０には、展開状態で、シート接合部４０を有しない部分が連続する無接合帯５１，５２として、伸縮方向ＥＤに対して鋭角（鋭角側交差角θ１）に交わる第１方向５１ｄに沿って直線的に連続する第１無接合帯５１が、第１方向５１ｄと直交する方向に間隔を空けて繰り返し存在する。また、伸縮領域８０における隣り合う第１無接合帯５１の間には、シート接合部４０及び接合孔３１が間隔を空けて多数設けられる。そして特徴的には、第１方向５１ｄと直交する方向の幅として定まる第１幅５１ｗが異なる複数本の第１無接合帯５１を含む単位構造が、伸縮領域８０における第１方向５１ｄと直交する方向に繰り返し存在する。   The arrangement pattern of the sheet joining portions 40 in the waist adjacent portion 22 is preferably as shown in the example shown in FIG. 9, the example shown in FIG. 11, and the example shown in FIG. That is, in these examples, the stretchable region 80 has an acute angle (acute angle side crossing angle θ1) with respect to the stretchable direction ED as the non-joint bands 51 and 52 in which the portions not having the sheet joint portion 40 are continuous in the unfolded state. The first non-joint band 51 that is linearly continuous along the first direction 51d intersecting with each other is repeatedly present at intervals in the direction orthogonal to the first direction 51d. In addition, a large number of sheet bonding portions 40 and bonding holes 31 are provided at intervals between the adjacent first non-bonding bands 51 in the stretchable region 80. Characteristically, the unit structure including a plurality of first non-joint bands 51 having different first widths 51w determined as the width in the direction orthogonal to the first direction 51d is orthogonal to the first direction 51d in the stretchable region 80. It exists repeatedly in the direction.

このように、第１幅５１ｗが異なる複数本の第１無接合帯５１を含む単位構造が、伸縮領域８０における第１方向５１ｄと直交する方向に繰り返し存在すると、第１無接合帯５１の内部の弾性シート３０の連続部にも、同様の大小関係の幅変化が形成される。つまり、第１無接合帯５１の幅５１ｗが狭ければ、内部の弾性シート３０の連続部の幅も狭くなり、第１無接合帯５１の幅５１ｗが広ければ、内部の弾性シート３０の連続部の幅も広くなる。そして、第１無接合帯５１内の弾性シート３０の連続部に、第１幅５１ｗの変化があると、幅の広い第１無接合帯５１内の弾性シート３０の連続部及び幅の狭い第１無接合帯５１内の弾性シート３０の連続部の双方が視覚的に強調される結果、伸縮領域８０が自然長状態（図１３及び図１７参照）であっても、ある程度伸長した装着状態であっても、斜め縞模様の美しい外観を呈することとなる。また、ある程度収縮した状態では、第１無接合帯５１における収縮襞２５の大きさが、第１無接合帯５１の第１幅５１ｗに応じて変化するため、この収縮襞２５の影響により斜め縞模様がよりはっきりと現出するようになる。   As described above, when a unit structure including a plurality of first non-joint bands 51 having different first widths 51w is repeatedly present in a direction orthogonal to the first direction 51d in the stretchable region 80, the inside of the first non-joint band 51 A similar width change is also formed in the continuous portion of the elastic sheet 30. That is, if the width 51w of the first non-bonding band 51 is narrow, the width of the continuous portion of the internal elastic sheet 30 is also narrowed. If the width 51w of the first non-bonding band 51 is wide, the continuous of the internal elastic sheet 30 is continuous. The width of the part is also widened. Then, if there is a change in the first width 51w in the continuous portion of the elastic sheet 30 in the first non-bonding band 51, the continuous portion of the elastic sheet 30 in the wide first non-bonding band 51 and the narrow width of the first non-bonding band 51. 1 As a result of visually emphasizing both the continuous portions of the elastic sheet 30 in the non-joint band 51, even when the stretchable region 80 is in a natural length state (see FIGS. 13 and 17), Even if it exists, the beautiful appearance of the diagonal stripe pattern will be exhibited. Further, in a state of contracting to some extent, the size of the shrinkage ridge 25 in the first non-bonding band 51 changes according to the first width 51w of the first non-bonding band 51. The pattern appears more clearly.

上述の単位構造は、第１幅５１ｗが異なる複数本の第１無接合帯５１を含む限り、その幅５１ｗの大小の程度により限定されるものではないが、第１無接合帯５１における第１幅５１ｗは、最も近い幅５１ｗの第１無接合帯５１に対して、大きい場合には１．２〜６０倍、小さい場合には０．０１〜０．８倍であることが好ましい。   The unit structure described above is not limited by the magnitude of the width 51w as long as it includes a plurality of first non-joint bands 51 having different first widths 51w. The width 51w is preferably 1.2 to 60 times larger than the first non-bonded band 51 having the closest width 51w and 0.01 to 0.8 times smaller.

また、上述の単位構造は、第１幅５１ｗが異なる複数本の第１無接合帯５１を含む限り、すべての第１無接合帯５１における第１幅５１ｗが異なっていてもよいし、図示するように一部の複数本の第１無接合帯５１における第１幅５１ｗと、他の単数又は複数本の第１無接合帯５１の第１幅５１ｗとが異なっていてもよい。   In addition, as long as the unit structure includes a plurality of first non-bonding bands 51 having different first widths 51w, the first widths 51w in all the first non-bonding bands 51 may be different or illustrated. As described above, the first width 51w of some of the plurality of first non-joint bands 51 may be different from the first width 51w of other single or plural first non-joint bands 51.

伸縮領域８０に、第１無接合帯５１の収縮襞２５及びその内部の弾性シート３０の連続部による第１方向５１ｄに沿う斜め縞模様が現出するとしても、同一の伸縮領域８０に他の斜め方向に沿う斜め縞模様がより強く視認されると、第１無接合帯５１の収縮襞２５及びその内部の弾性シート３０の連続部による斜め縞模様が目立たなくなるおそれがある。これに対して、第１無接合帯５１における第１幅５１ｗの最大値が、傾斜方向が異なる及び共通するすべての無接合帯５１，５２における連続方向と直交する方向の幅の最大値となっていると、伸縮領域８０内では第１無接合帯５１の収縮襞２５及びその内部の弾性シート３０の連続部による斜め縞模様が、より強く視認されるようになるため好ましい。この場合における、第１無接合帯５１における第１幅５１ｗの最大値は適宜定めることができるが、最も近い幅５１ｗの第１無接合帯５１に対して０．０１〜９倍であることが好ましい。なお、第１無接合帯５１を含むすべての無接合帯５１，５２は、連続方向と直交する方向の幅が限定されるものではないが、通常の場合０．３〜５０ｍｍの範囲内であることが好ましい。いうまでもないが、無接合帯５１，５２の連続方向と直交する方向の幅は、第１無接合帯５１にあっては第１幅５１ｗのことであり、直線的に連続する部分であるため等幅である。   Even if an oblique stripe pattern along the first direction 51d due to the shrinkage ridge 25 of the first non-bonding band 51 and the continuous portion of the elastic sheet 30 therein appears in the stretchable region 80, another stretched region 80 appears in the stretchable region 80. When the diagonal stripe pattern along the diagonal direction is visually recognized more strongly, there is a possibility that the diagonal stripe pattern due to the shrinkage ridge 25 of the first non-joint band 51 and the continuous portion of the elastic sheet 30 inside thereof becomes inconspicuous. On the other hand, the maximum value of the first width 51 w in the first non-joint band 51 is the maximum value of the width in the direction orthogonal to the continuous direction in all the common non-joint bands 51 and 52 having different inclination directions. In the stretchable region 80, it is preferable because the diagonal stripe pattern due to the shrinkage ridge 25 of the first non-bonding band 51 and the continuous portion of the elastic sheet 30 inside the first non-bonding band 51 is more visually recognized. In this case, the maximum value of the first width 51w in the first non-bonding band 51 can be determined as appropriate, but is 0.01 to 9 times that of the first non-bonding band 51 having the closest width 51w. preferable. In addition, although all the non-joint bands 51 and 52 including the 1st non-joint band 51 are not limited in the width | variety of the direction orthogonal to a continuous direction, it is in the range of 0.3-50 mm in normal cases. It is preferable. Needless to say, the width in the direction orthogonal to the continuous direction of the non-bonding bands 51 and 52 is the first width 51 w in the first non-bonding band 51 and is a linearly continuous portion. Therefore, the width is equal.

隣り合う第１無接合帯５１における第１方向５１ｄと直交する方向の間隔として定まる第１間隔５１ｓは適宜定めることができる。よって、この第１間隔５１ｓは、隣り合う第１無接合帯５１における第１幅５１ｗと同じにしても、より広くしても、より狭くしてもよい。一つの好ましい例としては、単位構造における、第１無接合帯５１における第１幅５１ｗの最大値が第１間隔５１ｓの最大値よりも小さい形態を挙げることができる。このように、単位構造に広い間隔部分を形成することにより、第１無接合帯５１の収縮襞２５及びその内部の弾性シート３０の連続部による斜め縞模様が、より強く視認されるようになる。この場合における、第１無接合帯５１における第１幅５１ｗの最大値は適宜定めることができるが、第１間隔５１ｓの最大値の０．０１〜９倍であると好ましい。なお、第１無接合帯５１を含むすべての無接合帯５１，５２における連続方向と直交する方向の間隔は特に限定されるものではないが、通常の場合０．３〜５０ｍｍの範囲内であることが好ましい。いうまでもないが、無接合帯５１，５２における連続方向と直交する方向の間隔は、第１無接合帯５１にあっては第１間隔５１ｓのことであり、連続方向に等しくなるものである。   The first interval 51 s determined as the interval in the direction orthogonal to the first direction 51 d in the adjacent first non-joint bands 51 can be determined as appropriate. Therefore, the first interval 51s may be the same as the first width 51w in the adjacent first non-joint bands 51, or may be wider or narrower. As one preferable example, a form in which the maximum value of the first width 51w in the first non-joint band 51 is smaller than the maximum value of the first interval 51s in the unit structure can be mentioned. In this way, by forming a wide space portion in the unit structure, the diagonal stripe pattern due to the shrinkage ridge 25 of the first non-bonded band 51 and the continuous portion of the elastic sheet 30 inside thereof is more visually recognized. . In this case, the maximum value of the first width 51w in the first non-bonding band 51 can be determined as appropriate, but is preferably 0.01 to 9 times the maximum value of the first interval 51s. In addition, although the space | interval of the direction orthogonal to the continuous direction in all the non-joining bands 51 and 52 including the 1st non-joining band 51 is not specifically limited, Usually, it exists in the range of 0.3-50 mm. It is preferable. Needless to say, the interval in the direction orthogonal to the continuous direction in the non-bonded bands 51 and 52 is the first interval 51 s in the first non-bonded band 51 and is equal to the continuous direction. .

無接合帯５１，５２としては、第１方向５１ｄ以外の、伸縮方向ＥＤに対して鋭角（鋭角側交差角θ２）に交わる第２方向５２ｄに沿って直線的に連続する第２無接合帯５２が、第２方向５２ｄと直交する方向に間隔を空けて繰り返し存在してもよいし、第２無接合帯５２が存在しなくてもよい。第２無接合帯５２を有する一つの好ましい形態は、伸縮領域８０には、無接合帯５１，５２が斜め格子状に形成されており、第１無接合帯５１は、斜め格子状の無接合帯５１，５２における一方の方向に連続する部分であり、第２無接合帯５２は、斜め格子状の無接合帯５１，５２における他方の方向に連続する部分であるとものである。この場合、第１方向５１ｄ及び第２方向５２ｄは、伸縮方向ＥＤに対する傾きの正負が互いに逆となる。なお、図１１に示す例及び図１５に示す例のように、幅方向ＷＤ（伸縮方向ＥＤ）に連続する無接合帯５１，５２を有しない形態であっても、伸縮領域８０の展開状態で、第１方向５１ｄ及び第２方向５２ｄの伸縮方向ＥＤに対する鋭角側交差角θ１，θ２がそれぞれ５〜４５度、特に１０〜３０であることにより、伸縮領域８０における伸縮性を十分に確保することができる。   As the non-bonding bands 51 and 52, the second non-bonding band 52 continuously linearly along the second direction 52d intersecting the acute angle (acute angle side crossing angle θ2) with respect to the expansion / contraction direction ED other than the first direction 51d. However, it may exist repeatedly at intervals in the direction orthogonal to the second direction 52d, or the second non-joint band 52 may not exist. In one preferred form having the second non-bonded band 52, the non-bonded bands 51, 52 are formed in a slanted lattice shape in the stretchable region 80, and the first non-bonded band 51 is formed in a non-bonded shape of a diagonal lattice. The bands 51 and 52 are portions that are continuous in one direction, and the second non-bonded band 52 is a portion that is continuous in the other direction of the diagonal lattice-shaped non-bonded bands 51 and 52. In this case, the first direction 51d and the second direction 52d are opposite to each other in terms of inclination with respect to the expansion / contraction direction ED. Note that, as in the example shown in FIG. 11 and the example shown in FIG. 15, even in a form that does not have the non-joint bands 51 and 52 that are continuous in the width direction WD (stretching direction ED), By ensuring that the acute side crossing angles θ1 and θ2 with respect to the expansion / contraction direction ED in the first direction 51d and the second direction 52d are 5 to 45 degrees, particularly 10 to 30 respectively, sufficient elasticity in the expansion and contraction region 80 is ensured. Can do.

ただし、同一の伸縮領域８０に第２無接合帯５２の斜め方向に沿う斜め縞模様がより強く視認されると、第１無接合帯５１の収縮襞２５及びその内部の弾性シート３０の連続部による斜め縞模様が目立たなくなるおそれがある。よって、図１５に示す例のように第２無接合帯５２を有する場合、第２無接合帯５２における第２方向と直交する方向の幅として定まる第２幅５２ｗがすべて同一であるか、又は、第２無接合帯５２を有しないようにシート接合部４０を配置することが望ましい。これにより、伸縮領域８０内では第１無接合帯５１の収縮襞２５及びその内部の弾性シート３０の連続部による斜め縞模様が、より強く視認されるようになる。   However, when an oblique stripe pattern along the oblique direction of the second non-bonding band 52 is more strongly visually recognized in the same stretchable region 80, the contraction ridge 25 of the first non-bonding band 51 and the continuous portion of the elastic sheet 30 therein There is a possibility that the diagonal stripe pattern by becomes inconspicuous. Accordingly, when the second non-joint band 52 is provided as in the example shown in FIG. 15, the second widths 52w determined as the widths in the direction orthogonal to the second direction in the second non-joint band 52 are all the same, or It is desirable to arrange the sheet bonding portion 40 so as not to have the second non-bonding band 52. Thereby, in the expansion-contraction area | region 80, the diagonal stripe pattern by the continuous part of the shrinkage | contraction wrinkle 25 of the 1st non-joining belt | band | zone 51 and the elastic sheet 30 inside comes to be visually recognized more strongly.

他方、隣り合う第１無接合帯５１の間には、シート接合部４０を第１方向５１ｄに整列させることとなるが、この場合例えば図１６に示すように、シート接合部４０はすべて、伸縮方向ＥＤと直交する方向に対する長手方向の鋭角側交差角θ３が１０度以内、かつ伸縮方向ＥＤの最大寸法４０ｅが０．１〜０．４ｍｍの細長状をなしていると、第１無接合帯５１の伸縮方向ＥＤの寸法をより大きく確保することができ、伸縮性の低下を抑制することができるため好ましい。   On the other hand, between the adjacent first non-bonding bands 51, the sheet bonding portions 40 are aligned in the first direction 51d. In this case, for example, as shown in FIG. If the acute angle crossing angle θ3 in the longitudinal direction with respect to the direction orthogonal to the direction ED is within 10 degrees and the maximum dimension 40e in the expansion / contraction direction ED is an elongated shape of 0.1 to 0.4 mm, It is preferable because the dimension of 51 in the expansion / contraction direction ED can be ensured to be larger and a decrease in stretchability can be suppressed.

また、図１１に示す例のように、単位構造に、第１幅５１ｗが最大となる広幅第１無接合帯５１、及びこれよりも第１幅５１ｗが狭い狭幅第１無接合帯５１を、それぞれ第１方向５１ｄと直交する方向に隣接して複数本含む場合、隣り合う広幅第１無接合帯５１の間には、第２方向５２ｄに対する長手方向の鋭角側交差角が５度以内、かつその長手方向と直交する方向の最大寸法４０ｆが０．１〜０．４ｍｍの細長状をなすシート接合部４０が、第１方向５１ｄに間隔を空けて整列されていると好ましい。また、隣り合う狭幅第１無接合帯５１の間には、第１方向５１ｄに対する長手方向の鋭角側交差角θ３が４５度以上、かつその長手方向と直交する方向の最大寸法４０ｇが０．１〜０．４ｍｍの細長状をなすシート接合部４０が、第１方向５１ｄに間隔を空けて整列されていると好ましい。このようなシート接合部４０の形状及び配置により、より少ないシート接合部４０の面積で、第１無接合帯５１の収縮襞２５及びその内部の弾性シート３０の連続部が特に視覚的に強調されるようになる。   Further, as in the example shown in FIG. 11, the unit structure includes a wide first non-joint band 51 in which the first width 51 w is maximum, and a narrow first non-joint band 51 in which the first width 51 w is narrower than this. In the case where a plurality of adjacent ones in the direction orthogonal to the first direction 51d are included, the acute angle crossing angle in the longitudinal direction with respect to the second direction 52d is within 5 degrees between the adjacent wide first non-joint bands 51. In addition, it is preferable that the sheet joining portions 40 having an elongated shape having a maximum dimension 40f in a direction orthogonal to the longitudinal direction of 0.1 to 0.4 mm are aligned with an interval in the first direction 51d. Further, between the adjacent narrow first non-bonding bands 51, the acute angle side crossing angle θ3 in the longitudinal direction with respect to the first direction 51d is 45 degrees or more, and the maximum dimension 40g in the direction orthogonal to the longitudinal direction is 0. It is preferable that the sheet joining portions 40 having an elongated shape of 1 to 0.4 mm are aligned with an interval in the first direction 51d. With such a shape and arrangement of the sheet bonding portion 40, the shrinkage ridge 25 of the first non-bonding band 51 and the continuous portion of the elastic sheet 30 therein are particularly visually emphasized with a smaller area of the sheet bonding portion 40. Become so.

隣り合う無接合帯５１，５２の間に位置するシート接合部４０の列（無接合帯５１，５２の連続方向の列）は、一列であっても複数列であってもよい。また、列の方向におけるシート接合部４０の間隔は規則的であることが好ましいが、すべての間隔が一定である必要はなく、一部の間隔が異なっていてもよい。   The row of the sheet bonding portions 40 positioned between the adjacent non-bonding bands 51 and 52 (the row in the continuous direction of the non-bonding bands 51 and 52) may be a single row or a plurality of rows. Moreover, although it is preferable that the space | interval of the sheet | seat junction part 40 in the row direction is regular, all the space | intervals do not need to be constant and some space | intervals may differ.

（ウエスト部及びウエスト隣接部の伸縮領域の相違等について）
図１９はウエスト部２３をより強く締め付けることができる接合孔３１及びシート接合部４０の配列例を示している。この例では、ウエスト部２３の伸縮領域８０には、展開状態で、接合孔３１を有しない部分が幅方向ＷＤに沿って連続する無孔帯３２と、シート接合部４０が幅方向ＷＤに間隔を空けて配置された接合帯５３とが、幅方向ＷＤと直交する直交方向ＸＤに交互に繰り返し設けられている。また、ウエスト隣接部２２の伸縮領域８０には、展開状態で、接合孔３１を有しない部分が幅方向ＷＤに沿って連続する無孔帯３２が少なくとも一本（図示例では無孔帯３２と、シート接合部４０が幅方向ＷＤに間隔を空けて配置された接合帯５３とが、直交方向ＸＤに交互に繰り返し）設けられるとともに、ウエスト部２３における複数本の無孔帯３２の直交方向ＸＤの寸法が、ウエスト隣接部２２の無孔帯３２の直交方向ＸＤの寸法よりも長くなっている。ウエスト隣接部２２の伸縮領域８０の一部又は全部は、が無孔帯３２を有しない前述の構造（図９に示す例、図１１に示す例及び図１５に示す例）となっていてもよい。 (Differences in stretchable areas between the waist and adjacent waist)
FIG. 19 shows an arrangement example of the joint holes 31 and the sheet joint portions 40 that can tighten the waist portion 23 more strongly. In this example, the stretchable region 80 of the waist 23 has a non-porous band 32 in which a portion that does not have the bonding hole 31 is continuous along the width direction WD in the expanded state, and the sheet bonding portion 40 is spaced in the width direction WD. The joining bands 53 arranged with a gap between them are alternately and repeatedly provided in the orthogonal direction XD orthogonal to the width direction WD. Further, the stretchable region 80 of the waist adjacent portion 22 has at least one non-porous band 32 in which the portion that does not have the bonding hole 31 is continuous along the width direction WD in the expanded state (in the illustrated example, the non-porous band 32 and In addition, the joining zone 53 in which the sheet joining portions 40 are arranged at intervals in the width direction WD are alternately provided in the orthogonal direction XD), and the orthogonal direction XD of the plurality of non-porous bands 32 in the waist portion 23 is provided. Is longer than the dimension in the orthogonal direction XD of the non-perforated band 32 of the waist adjacent portion 22. Even if a part or all of the stretchable region 80 of the waist adjacent portion 22 has the above-described structure (the example shown in FIG. 9, the example shown in FIG. 11, and the example shown in FIG. 15) that does not have the non-porous band 32. Good.

前述のように、本伸縮構造２０Ｘでは、締め付け力は弾性シート３０の伸長応力と接触面積によりほぼ決まり、弾性シート３０の伸長応力の強さは基本的に弾性シート３０の断面積（厚み一定であれば幅方向ＷＤと直交する直交方向ＸＤの寸法）で決まる。さらに、本伸縮構造２０Ｘでは、シート接合部４０を有する部分では弾性シート３０の連続性がなくなる。そのため、本伸縮構造２０Ｘにおいて伸長応力に寄与する弾性シート３０の断面積は基本的に無孔帯３２の直交方向ＸＤの寸法により決まる。ここで、本伸縮構造では、ウエスト部２３における複数本の無孔帯３２の直交方向ＸＤの寸法がウエスト隣接部２２の無孔帯３２の直交方向ＸＤの寸法よりも長いか、又はウエスト隣接部２２に無孔帯３２が設けられていない。したがって、本態様の使い捨て着用物品は、ウエスト部２３及びウエスト隣接部２２にわたる同一の弾性シート３０により伸縮するものでありながら、ウエスト部２３の厚み増加なく、つまり図示例のようにウエスト部２３の弾性シート３０が単層（折り返しなどにより複数層になっていない）であっても、ウエスト部２３をより強く締め付けることができる。   As described above, in the elastic structure 20X, the tightening force is substantially determined by the extension stress and the contact area of the elastic sheet 30, and the strength of the extension stress of the elastic sheet 30 is basically the cross-sectional area (thickness is constant). If there is, it is determined by the dimension in the orthogonal direction XD orthogonal to the width direction WD). Furthermore, in the present stretchable structure 20X, the continuity of the elastic sheet 30 is lost at the portion having the sheet joint portion 40. Therefore, the cross-sectional area of the elastic sheet 30 that contributes to the extension stress in the elastic structure 20X is basically determined by the dimension of the non-porous band 32 in the orthogonal direction XD. Here, in this stretchable structure, the dimension in the orthogonal direction XD of the plurality of non-perforated bands 32 in the waist part 23 is longer than the dimension in the orthogonal direction XD of the non-perforated band 32 of the waist adjacent part 22, or the waist adjacent part 22 is not provided with a non-perforated band 32. Therefore, the disposable wearing article of this aspect is expanded and contracted by the same elastic sheet 30 across the waist portion 23 and the waist adjacent portion 22, but the thickness of the waist portion 23 does not increase, that is, as shown in the illustrated example. Even if the elastic sheet 30 is a single layer (not formed into a plurality of layers by folding or the like), the waist portion 23 can be tightened more strongly.

ウエスト部２３及びウエスト隣接部２２における無孔帯３２の直交方向ＸＤの寸法は適宜定めればよい。一例として、弾性シート３０が厚み２０〜４０μｍの弾性フィルムである場合、ウエスト部２３における複数本の無孔帯３２の直交方向ＸＤの寸法は２〜５ｍｍであり、ウエスト隣接部２２の無孔帯３２の直交方向ＸＤの寸法は、ウエスト部２３における複数本の無孔帯３２の直交方向ＸＤの寸法の０．２５倍以下であるか、又は、ウエスト隣接部２２に無孔帯３２が設けられていないと好ましい。   What is necessary is just to determine suitably the dimension of the orthogonal direction XD of the non-porous belt | band | zone 32 in the waist part 23 and the waist adjacent part 22. FIG. As an example, when the elastic sheet 30 is an elastic film having a thickness of 20 to 40 μm, the dimension in the orthogonal direction XD of the plurality of non-porous bands 32 in the waist portion 23 is 2 to 5 mm, and the non-porous band of the waist adjacent portions 22 The dimension of the orthogonal direction XD of 32 is 0.25 times or less the dimension of the orthogonal direction XD of the plurality of non-perforated bands 32 in the waist part 23, or the non-perforated band 32 is provided in the waist adjacent part 22. If not, it is preferable.

ウエスト部２３の無孔帯３２の数は、締め付け力に応じて定まる無孔帯３２の直交方向ＸＤの寸法と、ウエスト部２３の直交方向ＸＤの寸法とにより自ずと定まるものであるが、通常の場合３〜７本程度であることが好ましい。   The number of non-perforated bands 32 of the waist part 23 is naturally determined by the dimensions of the non-perforated band 32 determined in accordance with the tightening force in the orthogonal direction XD and the dimensions of the waist part 23 in the orthogonal direction XD. In some cases, the number is preferably about 3 to 7.

ウエスト部２３における複数本の無孔帯３２の直交方向ＸＤの寸法が、ウエスト隣接部２２の無孔帯３２の直交方向ＸＤの寸法よりも長い限り、図２０に示す例のように、ウエスト部２３における一本（又は複数本でもよいが、過半数未満であることが好ましい。）の無孔帯３２の直交方向ＸＤの寸法は、ウエスト隣接部２２の無孔帯３２の直交方向ＸＤの寸法より短くてもよい。この場合における、ウエスト隣接部２２の無孔帯３２の直交方向ＸＤの寸法より短い、ウエスト部２３の無孔帯３２は、ウエスト部２３におけるウエスト開口側の端部に位置するもののみであることが望ましいが、ウエスト部２３の直交方向ＸＤの中間に位置していてもよい。   As long as the dimension in the orthogonal direction XD of the plurality of non-perforated bands 32 in the waist part 23 is longer than the dimension in the orthogonal direction XD of the non-perforated band 32 of the waist adjacent part 22, as shown in the example shown in FIG. The dimension in the orthogonal direction XD of one (or more, but preferably less than a majority) of the non-perforated band 32 in 23 is greater than the dimension of the non-perforated band 32 in the waist adjacent portion 22 in the orthogonal direction XD. It may be short. In this case, the non-perforated band 32 of the waist part 23 that is shorter than the dimension in the orthogonal direction XD of the non-perforated band 32 of the waist adjacent part 22 is only located at the end of the waist part 23 on the waist opening side. However, it may be located in the middle of the orthogonal direction XD of the waist part 23.

ウエスト部２３における接合孔３１の形状は特に限定されるものではない。ウエスト部２３における接合孔３１は図１９に示す例のようにすべて同じであっても、図２２に示す例のように異なっていてもよい。ウエスト部２３における接合孔３１の自然長状態の形状が、図２０〜図２２に示す例のように、幅方向ＷＤに細長い形状が好ましく、特に上縁及び下縁（直交方向の両側の縁）が直線状の形状であると、同じ弾性シート３０の使用面積で比較した場合、接合孔３１の直交方向ＸＤの寸法が短いほど、ウエスト部２３の締め付け力を強くすることができるためより好ましい。また、この場合、第１シート層２０Ａ及び第２シート層２０Ｂを広範囲にわたり接合しつつ、シート接合部４０の面積を小さくすることができ、柔軟性及び通気性に優れるようになる。なお、図２０〜図２２は展開状態を示しているが、自然長状態では、接合孔３１の形状は長辺が幅方向ＷＤに沿う長方形状となるものである。自然長状態における接合孔３１の形状は、幅方向ＷＤ両端部が円弧状の長孔形状になっていたり、角が丸い長方形状となっていたりしてもよい。ウエスト部２３の接合帯５３における接合孔３１の寸法は適宜定めることができるが、通常の場合、直交方向ＸＤの寸法は０．１〜１．１ｍｍであると好ましい。なお、接合帯５３の直交方向ＸＤの両側に無孔帯３２が隣接していると、自然長状態で、シート接合部４０の形状及び配置が接合孔３１と同様となることは前述のとおりである。ウエスト部２３における接合孔３１とウエスト隣接部２２における接合孔３１の形状とは図１９に示す例のように同じであっても、図２２に示す例のように異なっていてもよい。   The shape of the joining hole 31 in the waist part 23 is not specifically limited. The joint holes 31 in the waist 23 may be the same as in the example shown in FIG. 19 or may be different as in the example shown in FIG. The shape of the joint hole 31 in the waist portion 23 in the natural length state is preferably an elongated shape in the width direction WD as in the examples shown in FIGS. 20 to 22, and particularly the upper edge and the lower edge (the edges on both sides in the orthogonal direction). Is a linear shape, it is more preferable that when the dimensions of the joint hole 31 in the orthogonal direction XD are shorter, the tightening force of the waist portion 23 can be increased. Further, in this case, the area of the sheet joining portion 40 can be reduced while joining the first sheet layer 20A and the second sheet layer 20B over a wide range, and the flexibility and breathability are improved. 20 to 22 show the unfolded state, but in the natural length state, the shape of the joining hole 31 is a rectangular shape whose long side is along the width direction WD. The shape of the joining hole 31 in the natural length state may be a long hole shape in which the both ends of the width direction WD are arc-shaped or a rectangular shape with rounded corners. Although the dimension of the joining hole 31 in the joining band 53 of the waist part 23 can be determined suitably, it is preferable in the normal case that the dimension of the orthogonal direction XD is 0.1 to 1.1 mm. As described above, when the non-porous band 32 is adjacent to both sides of the bonding band 53 in the orthogonal direction XD, the shape and arrangement of the sheet bonding portion 40 are the same as the bonding hole 31 in the natural length state. is there. The shape of the joint hole 31 in the waist part 23 and the shape of the joint hole 31 in the waist adjacent part 22 may be the same as in the example shown in FIG. 19 or may be different as in the example shown in FIG.

また、ウエスト部２３の接合帯５３における接合孔３１が大き過ぎたり、伸縮方向ＥＤに近過ぎたりすると、弾性シート３０が部分的に破断するおそれがあるため、接合孔３１の伸縮方向ＥＤの寸法は３〜６ｍｍであり、伸縮方向ＥＤの間隔は３〜８ｍｍであると好ましい。なお、ウエスト隣接部２２の接合部や接合孔３１の配置や寸法については前述の範囲内から適宜定めることができる。   In addition, if the bonding hole 31 in the bonding band 53 of the waist 23 is too large or too close to the expansion / contraction direction ED, the elastic sheet 30 may be partially broken. Is 3 to 6 mm, and the interval in the expansion and contraction direction ED is preferably 3 to 8 mm. In addition, about the arrangement | positioning and dimension of the junction part of the waist adjacent part 22, and the joining hole 31, it can determine suitably from the above-mentioned range.

ウエスト部２３における複数の無孔帯３２の一部又は全部に関して、直交方向ＸＤの寸法は同じであっても異なっていてもよい。例えば、図２１に示す例のように、ウエスト部２３の無孔帯３２の直交方向ＸＤの寸法が、ウエスト開口の縁に近づくにつれて長くなっていると、ウエスト部２３の縁に近いほど肌との密着性が高くなるため、ウエスト部２３の密着性を重視する場合に好適である。一例として、無孔帯３２の直交方向ＸＤの寸法は、最長の寸法が最短の寸法の１．５〜２．５倍程度とすることができる。   The dimensions in the orthogonal direction XD may be the same or different with respect to some or all of the plurality of non-perforated bands 32 in the waist portion 23. For example, as in the example shown in FIG. 21, when the dimension in the orthogonal direction XD of the non-perforated band 32 of the waist portion 23 becomes longer as it approaches the edge of the waist opening, Therefore, it is suitable when importance is attached to the adhesiveness of the waist portion 23. As an example, the dimension of the non-porous band 32 in the orthogonal direction XD can be about 1.5 to 2.5 times the longest dimension of the shortest dimension.

また、図２２に示す例のように、ウエスト部２３の無孔帯３２の直交方向ＸＤの寸法が、ウエスト開口の縁に近づくにつれて短くなっていてもよい。この場合、ウエスト部２３の縁に近いほど締め付け力が弱くなるため、装着状態でウエスト部２３と肌との間に簡単に指を入れて使い捨て着用物品をつかむことができる。よって、例えばパンツタイプ使い捨て着用物品であれば、装着状態でウエスト部２３を容易につかむことができ、パンツタイプ使い捨ておむつの上げ下ろし作業が容易になる。一例として、無孔帯３２の直交方向ＸＤの寸法は、最長の寸法が最短の寸法１．５〜２．５倍程度とすることができる。   Further, as in the example illustrated in FIG. 22, the dimension in the orthogonal direction XD of the non-porous band 32 of the waist portion 23 may be shortened as it approaches the edge of the waist opening. In this case, the closer to the edge of the waist part 23, the weaker the tightening force, so that the disposable wearing article can be grasped by simply putting a finger between the waist part 23 and the skin in the mounted state. Therefore, for example, if it is a pants type disposable wearing article, the waist part 23 can be easily grasped in the mounted state, and the raising and lowering work of the pant type disposable diaper becomes easy. As an example, the dimension of the non-porous band 32 in the orthogonal direction XD can be about 1.5 to 2.5 times the shortest dimension.

図２３に示すように、ウエスト部２３の無孔帯３２の直交方向ＸＤの寸法が、ウエスト部２３の幅方向ＷＤの中間２０Ｍ（例えばウエスト部２３の全幅の１／４〜１／２程度の範囲）ではウエスト開口の縁に近づくにつれて長くなり、これよりも幅方向ＷＤの外側２０Ｓではウエスト開口の縁に近づくにつれて短くなっていてもよい。この場合、ウエスト部２３の無孔帯３２の直交方向ＸＤの寸法が、幅方向ＷＤの位置により変化する。ここで、本態様における、無孔帯３２の直交方向ＸＤの寸法が長い部分は弾性シート３０の面積が大きくなるものの、その幅方向ＷＤの少なくとも一方は直交方向ＸＤの寸法が短いため、締め付け力としては弱くなる。この結果、本態様では、腹部を締め付ける部分ではウエスト部２３の縁に近いほど締め付け力が弱くなり、腸骨に接する部分ではウエスト部２３の縁から遠ざかるほど締め付け力が弱くなるため、ウエスト部２３のフィット性がより一層良好となる。一例として、無孔帯３２の直交方向ＸＤの寸法は、最長の寸法が最短の寸法の１．５〜２．５倍程度とすることができる。   As shown in FIG. 23, the dimension in the orthogonal direction XD of the non-perforated band 32 of the waist portion 23 is an intermediate 20M in the width direction WD of the waist portion 23 (for example, about 1/4 to 1/2 of the full width of the waist portion 23). In the range), it becomes longer as it approaches the edge of the waist opening, and may be shorter as it approaches the edge of the waist opening in the outer side 20S in the width direction WD. In this case, the dimension in the orthogonal direction XD of the non-perforated band 32 of the waist portion 23 varies depending on the position in the width direction WD. Here, in the present embodiment, the portion of the non-porous band 32 having the long dimension in the orthogonal direction XD has a large area, but at least one of the width direction WD has a short dimension in the orthogonal direction XD. As it becomes weaker. As a result, in this aspect, the tightening force becomes weaker as it is closer to the edge of the waist part 23 at the part where the abdomen is tightened, and the tightening force becomes weaker as it is farther from the edge of the waist part 23 at the part contacting the iliac. The fit becomes even better. As an example, the dimension of the non-porous band 32 in the orthogonal direction XD can be about 1.5 to 2.5 times the longest dimension of the shortest dimension.

他方、図２４に示す例では、ウエスト部２３の伸縮領域８０には、展開状態で、シート接合部４０を有しない部分が幅方向ＷＤに沿って連続する無接合帯５４と、シート接合部４０が幅方向ＷＤに間隔を空けて配置された接合帯５３とが、幅方向ＷＤと直交する直交方向ＸＤに交互に繰り返し設けられている。また、ウエスト部２３の伸縮領域８０における各無接合帯５４には、弾性シート３０が直交方向ＸＤに分断された弾性帯３３が配置されている。このような弾性帯３３の分断は、弾性シート３０における分断位置に沿ってシート接合部４０を密に配置し、シート接合部４０とともに形成される接合孔３１の間の部分をすべて破断させることにより行うことができる。さらに、ウエスト隣接部２２の伸縮領域８０には、展開状態で、接合孔３１を有しない部分が幅方向ＷＤに沿って連続する無孔帯３２が少なくとも一本（図示例では無孔帯３２と、シート接合部４０が幅方向ＷＤに間隔を空けて配置された接合帯５３とが、直交方向ＸＤに交互に繰り返し）設けられるとともに、ウエスト部２３における複数本の弾性帯の直交方向ＸＤの寸法が、ウエスト隣接部２２の無孔帯３２の直交方向ＸＤの寸法よりも広くなっている。ウエスト隣接部２２の伸縮領域８０の一部又は全部は、無孔帯３２を有しない前述の構造（図９に示す例、図１１に示す例及び図１５に示す例）となっていてもよい。   On the other hand, in the example shown in FIG. 24, the stretchable region 80 of the waist portion 23 includes a non-joint band 54 in which a portion that does not have the sheet joint portion 40 in the expanded state continues along the width direction WD, and the sheet joint portion 40. Are provided alternately and repeatedly in the orthogonal direction XD orthogonal to the width direction WD. Further, an elastic band 33 in which the elastic sheet 30 is divided in the orthogonal direction XD is disposed in each non-bonded band 54 in the stretchable region 80 of the waist portion 23. Such division of the elastic band 33 is performed by closely arranging the sheet joining portions 40 along the dividing positions in the elastic sheet 30 and breaking all the portions between the joining holes 31 formed together with the sheet joining portions 40. It can be carried out. Further, the stretchable region 80 of the waist adjacent portion 22 has at least one non-porous band 32 in a deployed state in which a portion not having the joint hole 31 continues along the width direction WD (in the illustrated example, the non-porous band 32 and , And the joining band 53 in which the sheet joining portions 40 are arranged at intervals in the width direction WD are alternately provided in the orthogonal direction XD), and the dimensions in the orthogonal direction XD of the plurality of elastic bands in the waist portion 23 are provided. However, it is wider than the dimension in the orthogonal direction XD of the non-porous band 32 of the waist adjacent portion 22. Part or all of the stretchable region 80 of the waist adjacent portion 22 may have the above-described structure (the example shown in FIG. 9, the example shown in FIG. 11, and the example shown in FIG. 15) that does not have the non-porous band 32. .

この例では、ウエスト部２３の弾性帯３３は弾性シート３０の分断により形成されているとともに、ウエスト部２３における複数本の弾性帯３３の直交方向ＸＤの寸法がウエスト隣接部２２の無孔帯３２の直交方向ＸＤの寸法よりも長いか、又はウエスト隣接部２２に無孔帯３２が設けられていない。したがって、単一の弾性シート３０によりウエスト部２３及びウエスト隣接部２２に伸縮性が付与されるものでありながら、ウエスト部２３の厚み増加なく、つまり弾性シート３０が単層（折り返しなどにより複数層になっていない）であっても、ウエスト部２３をより強く締め付けることができる。さらに、弾性シート３０がウエスト部２３からウエスト隣接部２２にわたり連続せずに、ウエスト部２３の伸縮領域８０に弾性シート３０が分断された弾性帯３３が設けられるため、ウエスト部２３の外観がウエスト隣接部２２の外観と異なり、ウエスト部２３の外観を目立たせることが可能となる。   In this example, the elastic band 33 of the waist part 23 is formed by dividing the elastic sheet 30, and the dimension in the orthogonal direction XD of the plurality of elastic bands 33 in the waist part 23 is the non-porous band 32 of the waist adjacent part 22. It is longer than the dimension in the orthogonal direction XD, or the non-porous band 32 is not provided in the waist adjacent portion 22. Therefore, while the elastic part 30 provides elasticity to the waist part 23 and the waist adjacent part 22 by the single elastic sheet 30, there is no increase in the thickness of the waist part 23, that is, the elastic sheet 30 is a single layer (multiple layers by folding or the like). Even if it is not, the waist part 23 can be tightened more strongly. Furthermore, since the elastic sheet 30 is not continuous from the waist part 23 to the waist adjacent part 22 and the elastic band 33 in which the elastic sheet 30 is divided is provided in the stretchable region 80 of the waist part 23, the appearance of the waist part 23 is the waist. Unlike the appearance of the adjacent portion 22, the appearance of the waist portion 23 can be made conspicuous.

ウエスト部２３の弾性帯３３及びウエスト隣接部２２における無孔帯３２の直交方向ＸＤの寸法は適宜定めればよい。一例として、弾性シート３０が厚み２０〜４０μｍの弾性フィルムである場合、ウエスト部２３における複数本の弾性帯３３の直交方向ＸＤの寸法は２〜５ｍｍであり、ウエスト隣接部２２の無孔帯３２の直交方向ＸＤの寸法は、ウエスト部２３における複数本の弾性帯３３の直交方向ＸＤの寸法の０．２５倍以下であるか、又は、ウエスト隣接部２２に無孔帯３２が設けられていないと好ましい。   The dimensions in the orthogonal direction XD of the elastic band 33 of the waist part 23 and the non-porous band 32 in the waist adjacent part 22 may be determined as appropriate. As an example, when the elastic sheet 30 is an elastic film having a thickness of 20 to 40 μm, the dimension in the orthogonal direction XD of the plurality of elastic bands 33 in the waist part 23 is 2 to 5 mm, and the non-porous band 32 of the waist adjacent part 22. The dimension in the orthogonal direction XD is 0.25 times or less the dimension in the orthogonal direction XD of the plurality of elastic bands 33 in the waist part 23, or the non-porous band 32 is not provided in the waist adjacent part 22. And preferred.

ウエスト部２３における複数本の弾性帯３３の直交方向ＸＤの寸法が、ウエスト隣接部２２の弾性帯３３の直交方向ＸＤの寸法よりも長い限り、ウエスト部２３における一本（又は複数本でもよいが、過半数未満であることが好ましい。）の弾性帯３３の直交方向ＸＤの寸法は、ウエスト隣接部２２の弾性帯３３の直交方向ＸＤの寸法より短くてもよい。この場合における、ウエスト隣接部２２の弾性帯３３の直交方向ＸＤの寸法より短い、ウエスト部２３の弾性帯３３は、ウエスト部２３におけるウエスト開口側の端部に位置するもののみであることが望ましいが、ウエスト部２３の直交方向ＸＤの中間に位置していてもよい。   As long as the dimension in the orthogonal direction XD of the plurality of elastic bands 33 in the waist part 23 is longer than the dimension in the orthogonal direction XD of the elastic band 33 in the waist adjacent part 22, one (or more than one) in the waist part 23 may be used. The dimension of the elastic band 33 in the orthogonal direction XD may be shorter than the dimension of the elastic band 33 of the waist adjacent portion 22 in the orthogonal direction XD. In this case, it is desirable that the elastic band 33 of the waist part 23, which is shorter than the dimension in the orthogonal direction XD of the elastic band 33 of the waist adjacent part 22, is only the one located at the end of the waist part 23 on the waist opening side. However, you may be located in the middle of the orthogonal | vertical direction XD of the waist part 23. FIG.

ウエスト部２３の弾性帯３３の数は、締め付け力に応じて定まる弾性帯３３の直交方向ＸＤの寸法と、ウエスト部２３の直交方向ＸＤの寸法とにより自ずと定まるものであるが、通常の場合３〜７本程度であることが好ましい。   The number of elastic bands 33 of the waist part 23 is naturally determined by the dimension in the orthogonal direction XD of the elastic band 33 determined according to the tightening force and the dimension in the orthogonal direction XD of the waist part 23. It is preferable that it is about ~ 7.

シート接合部４０の寸法及び配置は、弾性シート３０が分断可能な限り適宜定めればよいが、通常の場合、シート接合部４０の伸縮方向ＥＤの寸法は０．５〜３．０ｍｍであり、伸縮方向ＥＤの間隔は２〜５ｍｍであると好ましい。   The dimensions and arrangement of the sheet bonding portion 40 may be appropriately determined as long as the elastic sheet 30 can be divided, but in a normal case, the dimension of the expansion / contraction direction ED of the sheet bonding portion 40 is 0.5 to 3.0 mm, The interval in the expansion / contraction direction ED is preferably 2 to 5 mm.

図２４に示す例における他の事項は、前述の図１９等に示す例と同様である。   Other matters in the example shown in FIG. 24 are the same as those in the example shown in FIG.

（非伸縮領域）
外装体２０における弾性シート伸縮構造２０Ｘを有する領域には、図２に示すように、伸縮領域８０の少なくとも幅方向一方側に非伸縮領域７０を設けることができる。非伸縮領域７０は、伸縮方向の最大伸びが１２０％以下を意味する。非伸縮領域７０の最大伸びは１１０％以下であると好ましく、１００％であるとより好ましい。伸縮領域８０及び非伸縮領域７０の配置は適宜定めることができる。本例のようなパンツタイプ使い捨ておむつの外装体２０の場合、吸収体１３と重なる部分は伸縮が不要な領域であるため、図示形態のように、吸収体１３と重なる部分の一部又は全部（内外固定領域１０Ｂのほぼ全体を含むことが望ましい）を非伸縮領域７０とするのは好ましい。つまり、ウエスト部２３の伸縮領域８０は、ウエスト部２３の幅方向ＷＤ全体（サイドシール部２１除く）にわたり連続しているが、ウエスト隣接部２２の一部が非伸縮領域７０となっている。もちろん、吸収体１３と重なる領域からその幅方向ＷＤ又は前後方向ＬＤに位置する吸収体１３と重ならない領域にかけて非伸縮領域７０を設けることもでき、吸収体１３と重ならない領域にのみ非伸縮領域７０を設けることもできる。 (Non-stretchable area)
As shown in FIG. 2, a non-stretchable region 70 can be provided on at least one side in the width direction of the stretchable region 80 in the region having the elastic sheet stretchable structure 20 </ b> X in the exterior body 20. The non-stretchable region 70 means that the maximum stretch in the stretch direction is 120% or less. The maximum elongation of the non-stretchable region 70 is preferably 110% or less, and more preferably 100%. The arrangement of the stretchable region 80 and the non-stretchable region 70 can be determined as appropriate. In the case of the exterior body 20 of the pants-type disposable diaper as in this example, the portion that overlaps the absorber 13 is an area that does not need to be expanded and contracted. Therefore, as shown in the figure, a part or all of the portion that overlaps the absorber 13 ( It is preferable that the non-stretchable region 70 is preferably included in substantially the entire inner and outer fixed region 10B. That is, the stretchable region 80 of the waist portion 23 is continuous over the entire width direction WD of the waist portion 23 (excluding the side seal portion 21), but a part of the waist adjacent portion 22 is a non-stretchable region 70. Of course, the non-stretchable region 70 can be provided from the region overlapping with the absorber 13 to the region not overlapping with the absorber 13 positioned in the width direction WD or the front-rear direction LD, and the non-stretchable region only in the region not overlapping with the absorber 13. 70 can also be provided.

非伸縮領域７０における個々のシート接合部４０の形状は、特に限定されず、前述した形状から適宜選択することができる。   The shape of each sheet joint portion 40 in the non-stretchable region 70 is not particularly limited, and can be appropriately selected from the shapes described above.

また、非伸縮領域７０におけるシート接合部４０の面積率及び個々のシート接合部４０の面積は適宜定めることができるが、通常の場合、次の範囲内とすると、各シート接合部４０の面積が小さくかつシート接合部４０の面積率が低いことにより非伸縮領域７０が硬くならいためが好ましい。
シート接合部４０の面積：０．１０〜０．７５ｍｍ2（特に０．１０〜０．３５ｍｍ2）
シート接合部４０の面積率：４〜１３％（特に５〜１０％） Moreover, although the area ratio of the sheet | seat junction part 40 in the non-expanding-contraction area | region 70 and the area of each sheet | seat junction part 40 can be defined suitably, if it is set to the following range in normal cases, the area of each sheet | seat junction part 40 will be It is preferable that the non-stretchable region 70 does not become hard because it is small and the area ratio of the sheet bonding portion 40 is low.
Area of sheet joint 40: 0.10 to 0.75 mm 2 (particularly 0.10 to 0.35 mm 2 )
Area ratio of sheet joint 40: 4 to 13% (especially 5 to 10%)

非伸縮領域７０は、弾性シート３０の収縮力により第１シート層及び第２シート層が収縮して襞が形成されないようにシート接合部４０を密に配置すること等によって形成することができる。非伸縮領域７０の形成手法の具体例としては、例えば特許第５９８０３５５号、特許第５９１８８７７号、特許第５９８０３６７号、特許第６０４９２２８号に示されるものを挙げることができる。   The non-stretchable region 70 can be formed by densely arranging the sheet bonding portions 40 so that the first sheet layer and the second sheet layer are contracted by the contraction force of the elastic sheet 30 and no wrinkles are formed. Specific examples of the method for forming the non-stretchable region 70 include those shown in Japanese Patent No. 5980355, Japanese Patent No. 5918877, Japanese Patent No. 5980367, and Japanese Patent No. 6049228.

＜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。
・「前身頃」「後身頃」は、パンツタイプ使い捨ておむつの前後方向中央を境としてそれぞれ前側及び後側の部分を意味する。また、股間部は、パンツタイプ使い捨ておむつの前後方向中央を含む前後方向範囲を意味し、吸収体が括れ部を有する場合には当該括れ部を有する部分の前後方向範囲を意味する。
・「最大伸び」とは、伸縮方向ＥＤの伸びの最大値（換言すれば第１シート層及び第２シート層が収縮や弛み無く平坦に展開した展開状態の伸び）を意味し、展開状態の長さを自然長を１００％としたときの百分率で表すものである。
・「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８０、非伸縮領域７０）における対象部分（例えばシート接合部４０、接合孔３１の開口、通気孔）の総和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、特に伸縮構造を有する領域における「面積率」とは、展開状態の面積率を意味するものである。対象部分が間隔を空けて多数設けられる形態では、対象部分が１０個以上含まれるような大きさに対象領域を設定して、面積率を求めることが望ましい。
・「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２３±１℃、相対湿度５０±２％）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、試料又は試験片を温度１００℃の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、試料採取用の型板(１００ｍｍ×１００ｍｍ)を使用し、１００ｍｍ×１００ｍｍの寸法の試料を切り取る。試料の重量を測定し、１０倍して１平米あたりの重さを算出し、目付けとする。
・吸収体の「厚み」は、株式会社尾崎製作所の厚み測定器（ピーコック、ダイヤルシックネスゲージ大型タイプ、型式Ｊ−Ｂ（測定範囲０〜３５ｍｍ）又は型式Ｋ−４（測定範囲０〜５０ｍｍ））を用い、試料と厚み測定器を水平にして、測定する。
・上記以外の「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。
・「引張強度」及び「引張伸度（破断伸び）」は、試験片を幅３５ｍｍ×長さ８０ｍｍの長方形状とする以外は、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（標線間距離）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。引張試験機としては、例えばＳＨＩＭＡＤＺＵ社製のＡＵＴＯＧＲＡＰＨ ＡＧＳ−Ｇ１００Ｎを用いることができる。
・「伸長応力」とは、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（標線間距離）を５０ｍｍとし、引張速度を３００ｍｍ／ｍｉｎとする引張試験により、弾性領域内で伸長するときに測定される引張応力（Ｎ／３５ｍｍ）を意味し、伸長の程度は試験対象により適宜決定することができる。試験片は幅３５ｍｍ、長さ８０ｍｍ以上の長方形状とすることが好ましいが、幅３５ｍｍの試験片を切り出すことができない場合には、切り出し可能な幅で試験片を作成し、測定値を幅３５ｍｍに換算した値とする。また、対象領域が小さく、十分な試験片を採取できない場合であっても、伸長応力の大小を比較するのであれば、適宜小さい試験片でも同寸法の試験片を用いる限り少なくとも比較は可能である。引張試験機としては、例えばＳＨＩＭＡＤＺＵ社製のＡＵＴＯＧＲＡＰＨ ＡＧＳ−Ｇ１００Ｎを用いることができる。
・「展開状態」とは、収縮や弛み無く平坦に展開した状態を意味する。
・各部の寸法は、特に記載が無い限り、自然長状態ではなく展開状態における寸法を意味する。
・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２３±１℃、相対湿度５０±２％）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.
-"Front body" and "rear body" mean the front and rear portions of the pants-type disposable diaper in the front-rear direction center, respectively. Moreover, a crotch part means the front-back direction range containing the center of the front-back direction of a pants type disposable diaper, and when an absorber has a constriction part, it means the front-back direction range of the part which has the said constriction part.
“Maximum elongation” means the maximum value of the elongation in the expansion / contraction direction ED (in other words, the elongation of the unfolded state in which the first sheet layer and the second sheet layer are unfolded flat without contraction or slack). The length is expressed as a percentage when the natural length is 100%.
“Area ratio” means the ratio of the target portion to the unit area, and the target portion (for example, the sheet joint portion 40, the opening of the joint hole 31, the vent hole) in the target region (for example, the stretchable region 80, the non-stretchable region 70). ) Is divided by the area of the target region and expressed as a percentage. In particular, the “area ratio” in a region having a stretchable structure means an area ratio in a developed state. In a form in which a large number of target portions are provided at intervals, it is desirable to set the target region to a size that includes 10 or more target portions and obtain the area ratio.
“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 23 ± 1 ° C., relative humidity 50 ± 2%) to a constant weight. Pre-drying refers to making a sample or test piece constant in an environment at a temperature of 100 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%. From the test piece in a constant weight state, a sample plate (100 mm × 100 mm) is used to cut a sample having a size of 100 mm × 100 mm. The weight of the sample is measured, multiplied by 10, and the weight per square meter is calculated and used as the basis weight.
・ "Thickness" of the absorber is a thickness measuring instrument (Peacock, dial thickness gauge large type, model JB (measurement range 0 to 35 mm) or model K-4 (measurement range 0 to 50 mm)) manufactured by Ozaki Mfg. Co., Ltd. Measure the sample and the thickness meter horizontally.
-"Thickness" other than the above 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 .
・ "Tensile strength" and "tensile elongation (breaking elongation)" are in accordance with JIS K7127: 1999 "Plastic-Test method for tensile properties-" except that the test piece is rectangular with a width of 35 mm and a length of 80 mm. The initial chuck interval (distance between marked lines) is 50 mm, and the tensile speed is 300 mm / min. As the tensile tester, for example, AUTOGRAPH AGS-G100N manufactured by SHIMADZU can be used.
・ "Elongation stress" means according to JIS K7127: 1999 "Plastics-Test method for tensile properties-" by a tensile test in which the initial chuck interval (distance between marked lines) is 50 mm and the tensile speed is 300 mm / min. This means the tensile stress (N / 35 mm) measured when stretching in the elastic region, and the degree of stretching can be appropriately determined depending on the test object. It is preferable that the test piece has a rectangular shape with a width of 35 mm and a length of 80 mm or more. However, when a test piece with a width of 35 mm cannot be cut out, the test piece is prepared with a width that can be cut out, and the measured value is 35 mm. The value converted to. Even if the target area is small and sufficient specimens cannot be collected, as long as the magnitude of the extension stress is compared, at least a comparison can be made even if the specimens of the same size are used even if they are appropriately small. . As the tensile tester, for example, AUTOGRAPH AGS-G100N manufactured by SHIMADZU can be used.
-"Developed state" means a state where the plate is flattened without contraction or slack.
-Unless otherwise specified, the dimensions of each part mean dimensions in a deployed state, not a natural length state.
・ 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 state (test location: temperature 23 ± 1 ° C, relative humidity 50 ± 2%). To do.

本発明は、弾性シートにより弾性伸縮する伸縮部材を備えたものである限り、上記例のようなパンツタイプ使い捨ておむつの他、テープタイプ使い捨ておむつ、スイミングや水遊び用の使い捨て着用物品等、使い捨て着用物品全般に利用できるものである。   As long as the present invention includes an elastic member that elastically expands and contracts by an elastic sheet, in addition to a pants-type disposable diaper as in the above example, a disposable wear article such as a tape-type disposable diaper, a disposable wear article for swimming and water play, etc. It can be used in general.

１０…内装体、１０Ｂ…内外固定領域、１１…トップシート、１２…液不透過性シート、１３…吸収体、１３Ｎ…括れ部分、１４…包装シート、１７…無吸収体側部、２０…外装体、２０Ａ…第１シート層、２０Ｂ…第２シート層、２０Ｃ…折り返し部分、２０Ｘ…弾性シート伸縮構造、２１…サイドシール部、２２…ウエスト隣接部、２３…ウエスト部、２５…収縮襞、３０…弾性シート、３１…接合孔、３２…無孔帯、３３…弾性帯、４０…シート接合部、５１，５２…無接合帯、５１…第１無接合帯、５１ｄ…第１方向、５１ｓ…第１間隔、５１ｗ…第１幅、５２…第２無接合帯、５２ｄ…第２方向、５３…接合帯、７０…非伸縮領域、８０…伸縮領域、９０…立体ギャザー、９３…倒伏部分、９４…自由部分、９５…ギャザーシート、９６…ギャザー弾性部材、Ｂ…後身頃、ＥＤ…伸縮方向、Ｆ…前身頃、Ｌ…中間部、Ｔ…胴周り部、ＬＤ…前後方向、ＷＤ…幅方向、ＸＤ…直交方向。   DESCRIPTION OF SYMBOLS 10 ... Interior body, 10B ... Inner / outer fixed area | region, 11 ... Top sheet, 12 ... Liquid impervious sheet, 13 ... Absorber, 13N ... Constricted part, 14 ... Packaging sheet, 17 ... Non-absorber side part, 20 ... Exterior body , 20A ... first sheet layer, 20B ... second sheet layer, 20C ... folded portion, 20X ... elastic sheet stretchable structure, 21 ... side seal part, 22 ... waist adjacent part, 23 ... waist part, 25 ... contraction collar, 30 ... elastic sheet, 31 ... bonding hole, 32 ... non-hole band, 33 ... elastic band, 40 ... sheet bonding part, 51, 52 ... non-bonding band, 51 ... first non-bonding band, 51d ... first direction, 51s ... 1st interval, 51w ... 1st width, 52 ... 2nd non-joining band, 52d ... 2nd direction, 53 ... Joining band, 70 ... Non-stretchable area, 80 ... Stretchable area, 90 ... Solid gather, 93 ... Lodging part, 94 ... Free part, 95 ... Gather sheet 96 ... gather elastic member, B ... back body, ED ... stretching direction, F ... front body, L ... intermediate portion, T ... waist portion, LD ... front-rear direction, WD ... width direction, XD ... orthogonal direction.

Claims (9)

ウエスト部と、ウエスト部に隣接するウエスト隣接部とを有する伸縮部材を備えた、使い捨て着用物品において、
前記伸縮部材における前記ウエスト部及び前記ウエスト隣接部は、第１シート層、第２シート層、及びこれらの間に介在された弾性シートを有しており、
前記弾性シートは、前記ウエスト部から前記ウエスト隣接部にわたり連続しており、
前記第１シート層及び第２シート層は、間隔を空けて配列されたシート接合部で、弾性シートを貫通する接合孔を通じて溶着されており、
前記伸縮部材における前記ウエスト部及び前記ウエスト隣接部は、前記弾性シートの収縮により幅方向に収縮しているとともに幅方向に伸長可能な伸縮領域を有しており、
前記ウエスト部の伸縮領域には、展開状態で、前記接合孔を有しない部分が幅方向に沿って連続する無孔帯と、前記シート接合部が幅方向に間隔を空けて配置された接合帯とが、幅方向と直交する直交方向に交互に繰り返し設けられており、
前記ウエスト隣接部の伸縮領域には、展開状態で、前記接合孔を有しない部分が幅方向に沿って連続する無孔帯が設けられるとともに、前記ウエスト部における複数本の前記無孔帯の前記直交方向の寸法が、前記ウエスト隣接部の無孔帯の前記直交方向の寸法よりも長いか、又は、前記無孔帯が設けられていない、
ことを特徴とする使い捨て着用物品。 In the disposable wearing article comprising an elastic member having a waist part and a waist adjacent part adjacent to the waist part,
The waist portion and the waist adjacent portion in the elastic member have a first sheet layer, a second sheet layer, and an elastic sheet interposed therebetween,
The elastic sheet is continuous from the waist part to the waist adjacent part,
The first sheet layer and the second sheet layer are welded through a joint hole penetrating the elastic sheet, at a sheet joint portion arranged at intervals.
The waist portion and the waist adjacent portion in the stretchable member have a stretchable region that is stretched in the width direction and contracted in the width direction due to shrinkage of the elastic sheet,
In the stretched region of the waist part, in a deployed state, a non-perforated band in which a portion not having the bonding hole is continuous in the width direction, and a bonding band in which the sheet bonding part is arranged with an interval in the width direction Are alternately and repeatedly provided in an orthogonal direction orthogonal to the width direction,
The stretchable region of the waist adjacent portion is provided with a non-perforated band in which the portion that does not have the joint hole is continuous along the width direction in the unfolded state, and the plurality of the non-porous bands in the waist portion. The dimension in the orthogonal direction is longer than the dimension in the orthogonal direction of the non-perforated zone of the waist adjacent part, or the non-perforated zone is not provided,
A disposable wearing article characterized by the above. 前記弾性シートは、厚み２０〜４０μｍの弾性フィルムであり、
前記ウエスト部における複数本の無孔帯の前記直交方向の寸法が２〜５ｍｍであり、
前記ウエスト隣接部の無孔帯の前記直交方向の寸法は、前記ウエスト部における複数本の無孔帯の前記直交方向の寸法の０．２５倍以下であるか、又は、前記ウエスト隣接部に前記無孔帯が設けられていない、
請求項１記載の使い捨て着用物品。 The elastic sheet is an elastic film having a thickness of 20 to 40 μm,
The dimension in the orthogonal direction of the plurality of non-porous bands in the waist is 2 to 5 mm,
The dimension in the orthogonal direction of the non-perforated zone of the waist adjacent part is 0.25 times or less the dimension in the orthogonal direction of the plurality of non-perforated bands in the waist part, or the waist adjacent part has the No perforated zone is provided,
The disposable wearing article according to claim 1. 前記ウエスト部の接合帯に位置する前記接合孔は、自然長状態の形状が、前記幅方向に細長く、かつ上縁及び下縁が直線状の形状である、
請求項１又は２記載の使い捨て着用物品。 The joint hole located in the joint band of the waist part has a natural length shape that is elongated in the width direction, and an upper edge and a lower edge are linear shapes.
The disposable wearing article according to claim 1 or 2. 前記ウエスト部の無孔帯の前記直交方向の寸法が、ウエスト開口の縁に近づくにつれて長くなっている、
請求項１〜３のいずれか１項に記載の使い捨て着用物品。 The dimension in the orthogonal direction of the non-perforated band of the waist part becomes longer as it approaches the edge of the waist opening,
The disposable wearing article according to any one of claims 1 to 3. 前記ウエスト部の無孔帯の前記直交方向の寸法が、ウエスト開口の縁に近づくにつれて短くなっている、
請求項１〜３のいずれか１項に記載の使い捨て着用物品。 The dimension in the orthogonal direction of the non-perforated belt of the waist portion is shortened as it approaches the edge of the waist opening,
The disposable wearing article according to any one of claims 1 to 3. 前記ウエスト部の無孔帯の前記直交方向の寸法が、前記ウエスト部の幅方向の中間ではウエスト開口の縁に近づくにつれて長くなり、これよりも幅方向の外側ではウエスト開口の縁に近づくにつれて短くなっている、
請求項１〜３のいずれか１項に記載の使い捨て着用物品。 The dimension in the orthogonal direction of the non-perforated belt of the waist portion becomes longer as it approaches the edge of the waist opening in the middle of the width direction of the waist portion, and becomes shorter as it approaches the edge of the waist opening than in the width direction. Has become,
The disposable wearing article according to any one of claims 1 to 3. ウエスト部と、ウエスト部に隣接するウエスト隣接部とを有する伸縮部材を備えた、使い捨て着用物品において、
前記伸縮部材における前記ウエスト部及び前記ウエスト隣接部は、第１シート層、第２シート層、及びこれらの間に介在された弾性シートを有しており、
前記第１シート層及び第２シート層は、間隔を空けて配列されたシート接合部で、弾性シートを貫通する接合孔を通じて溶着されており、
前記伸縮部材における前記ウエスト部及び前記ウエスト隣接部は、前記弾性シートの収縮により幅方向に収縮しているとともに幅方向に伸長可能な伸縮領域を有しており、
前記ウエスト部の伸縮領域には、展開状態で、前記シート接合部を有しない部分が幅方向に沿って連続する無接合帯と、前記シート接合部が幅方向に間隔を空けて配置された接合帯とが、幅方向と直交する直交方向に交互に繰り返し設けられ、
前記ウエスト部の伸縮領域における各無接合帯には、前記弾性シートが前記直交方向に分断された弾性帯が配置され、
前記ウエスト隣接部の伸縮領域には、展開状態で、前記接合孔を有しない部分が幅方向に沿って連続する無孔帯が設けられるとともに、前記ウエスト部におけるにおける複数本の前記弾性帯の前記直交方向の寸法が、前記ウエスト隣接部の無孔帯の前記直交方向の寸法よりも長いか、又は、前記無孔帯が設けられていない、
ことを特徴とする使い捨て着用物品。 In the disposable wearing article comprising an elastic member having a waist part and a waist adjacent part adjacent to the waist part,
The waist portion and the waist adjacent portion in the elastic member have a first sheet layer, a second sheet layer, and an elastic sheet interposed therebetween,
The first sheet layer and the second sheet layer are welded through a joint hole penetrating the elastic sheet, at a sheet joint portion arranged at intervals.
The waist portion and the waist adjacent portion in the stretchable member have a stretchable region that is stretched in the width direction and contracted in the width direction due to shrinkage of the elastic sheet,
In the stretched region of the waist portion, in a deployed state, a non-joint band in which a portion not having the sheet joint portion is continuous along the width direction, and a joint in which the sheet joint portions are arranged at intervals in the width direction A belt is alternately and repeatedly provided in an orthogonal direction orthogonal to the width direction,
In each non-bonding band in the stretchable region of the waist part, an elastic band in which the elastic sheet is divided in the orthogonal direction is arranged,
The stretchable region of the waist adjacent portion is provided with a non-perforated band in which the portion that does not have the joint hole is continuous along the width direction in a deployed state, and the plurality of elastic bands in the waist portion The dimension in the orthogonal direction is longer than the dimension in the orthogonal direction of the non-perforated zone of the waist adjacent part, or the non-perforated zone is not provided,
A disposable wearing article characterized by the above. 前記弾性シートは、厚み２０〜４０μｍの弾性フィルムであり、
前記ウエスト部における複数本の弾性帯の前記直交方向の寸法が２〜５ｍｍであり、
前記ウエスト隣接部の無孔帯の前記直交方向の寸法は、前記ウエスト部における複数本の弾性帯の前記直交方向の寸法の０．２５倍以下であるか、又は、前記ウエスト隣接部に前記無孔帯が設けられていない、
請求項７記載の使い捨て着用物品。 The elastic sheet is an elastic film having a thickness of 20 to 40 μm,
The dimension in the orthogonal direction of the plurality of elastic bands in the waist is 2 to 5 mm,
The dimension of the non-perforated band of the waist adjacent part in the orthogonal direction is not more than 0.25 times the dimension of the plurality of elastic bands in the waist part in the orthogonal direction, or No zonal zone,
The disposable wearing article according to claim 7. 前身頃から後身頃にわたる一体的な外装体、又は前身頃及び後身頃に別々に設けられた外装体と、この外装体の幅方向中間部に取り付けられた、股間部の前後両側にわたる内装体と、前身頃における外装体の両側部と後身頃における外装体の両側部とがそれぞれ接合されたサイドシール部と、ウエスト開口及び左右一対の脚開口とを備えた、パンツタイプの使い捨て着用物品であって、
前記外装体が前記伸縮部材である、
請求項１〜８のいずれか１項に記載の使い捨て着用物品。 An integrated exterior body from the front body to the back body, or an exterior body provided separately for the front body and the back body, and an interior body that is attached to the middle part in the width direction of the exterior body and covers both the front and back of the crotch part The pants-type disposable wearing article comprises a side seal part in which both sides of the exterior body in the front body and both sides of the exterior body in the back body are joined, a waist opening and a pair of left and right leg openings. And
The exterior body is the elastic member;
The disposable wearing article according to any one of claims 1 to 8.
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