JP6049228B1 - Absorbent articles - Google Patents

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JP6049228B1
JP6049228B1 JP2015195458A JP2015195458A JP6049228B1 JP 6049228 B1 JP6049228 B1 JP 6049228B1 JP 2015195458 A JP2015195458 A JP 2015195458A JP 2015195458 A JP2015195458 A JP 2015195458A JP 6049228 B1 JP6049228 B1 JP 6049228B1
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stretchable
elastic film
region
sheet
sheet layer
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JP2017064224A (en
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俊輔 酒井
俊輔 酒井
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Daio Paper Corp
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Daio Paper Corp
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Priority to JP2015195458A priority Critical patent/JP6049228B1/en
Application filed by Daio Paper Corp filed Critical Daio Paper Corp
Priority to CN202010347849.1A priority patent/CN111513926B/en
Priority to CN201680007411.0A priority patent/CN107205858B/en
Priority to PCT/JP2016/052805 priority patent/WO2016121975A1/en
Priority to KR1020177024298A priority patent/KR102542160B1/en
Priority to EP20192721.7A priority patent/EP3777798B1/en
Priority to EP20192729.0A priority patent/EP3763344B1/en
Priority to CN202010347848.7A priority patent/CN111494095B/en
Priority to CN202010348033.0A priority patent/CN111513927B/en
Priority to EP16743578.3A priority patent/EP3251642B1/en
Priority to EP20192735.7A priority patent/EP3766467A1/en
Priority to US15/547,019 priority patent/US10849797B2/en
Application granted granted Critical
Publication of JP6049228B1 publication Critical patent/JP6049228B1/en
Publication of JP2017064224A publication Critical patent/JP2017064224A/en
Priority to US16/908,029 priority patent/US11771602B2/en
Priority to US16/907,881 priority patent/US11819391B2/en
Priority to US16/907,914 priority patent/US11903802B2/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/344Stretching or tensioning the joint area during joining
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083Joining 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
    • B29C65/086Joining 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/82Testing the joint
    • B29C65/8253Testing the joint by the use of waves or particle radiation, e.g. visual examination, scanning electron microscopy, or X-rays
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint 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
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/20Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21Particular 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General 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
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General 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
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/433Casing-in, i.e. enclosing an element between two sheets by an outlined seam
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General 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
    • B29C66/72General 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
    • B29C66/729Textile or other fibrous material made from plastics
    • B29C66/7294Non woven mats, e.g. felt
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General 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
    • B29C66/814General 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
    • B29C66/8141General 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
    • B29C66/81427General 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
    • B29C66/81429General 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General 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
    • B29C66/814General 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
    • B29C66/8141General 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
    • B29C66/81433General 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834General 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
    • B29C66/8351Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834General 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
    • B29C66/8341Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411Roller, cylinder or drum types
    • B29C66/83415Roller, cylinder or drum types the contact angle between said rollers, cylinders or drums and said parts to be joined being a non-zero angle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/48Wearing apparel
    • B29L2031/4871Underwear
    • B29L2031/4878Diapers, napkins

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

【課題】弾性フィルム伸縮構造の非伸縮領域において、見栄え悪化の防止、柔軟性の低下の防止、及び非伸縮性の向上を図る。【解決手段】上記課題は、第1シート層20Aと、第2シート層20Bとの間に弾性フィルム30が積層されてなる弾性フィルム伸縮構造20Xを備えており、この弾性フィルム伸縮構造20Xを有する領域は、非伸縮領域70と、この非伸縮領域70の少なくとも伸縮方向一方側に設けられた、伸縮方向に伸縮可能な伸縮領域80とを有するとともに、非伸縮領域70は、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で弾性フィルム30を貫通する貫通孔31を介して接合されるとともに、弾性フィルム30は伸縮方向に連続するものの、貫通孔31の存在により伸縮方向に沿って直線的に連続する部分を有しない、ことにより解決される。【選択図】図11In a non-stretchable region of an elastic film stretchable structure, the appearance is prevented from being deteriorated, the flexibility is prevented from being lowered, and the nonstretchability is improved. An object of the present invention is to provide an elastic film elastic structure 20X in which an elastic film 30 is laminated between a first sheet layer 20A and a second sheet layer 20B, and the elastic film elastic structure 20X is provided. The region includes a non-stretchable region 70 and a stretchable region 80 provided on at least one side of the non-stretchable region 70 and stretchable in the stretchable direction, and the non-stretchable region 70 includes the first sheet layer 20A. And the second sheet layer 20B is joined through the through holes 31 penetrating the elastic film 30 with a large number of sheet joining portions 40 arranged at intervals, and the elastic film 30 continues in the expansion and contraction direction. This is solved by not having a portion that continues linearly along the expansion and contraction direction due to the presence of the hole 31. [Selection] Figure 11

Description

本発明は、弾性フィルム等の弾性フィルムが第1シート層及び第2シート層で挟まれた伸縮構造を有する吸収性物品に関する。   The present invention relates to an absorbent article having a stretchable structure in which an elastic film such as an elastic film is sandwiched between a first sheet layer and a second sheet layer.

吸収性物品においては、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伸縮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、弾性フィルムを伸縮性の付与方向に伸長した状態で取り付ける手法も提案されている。(例えば特許文献1参照)。   In an absorbent article, in order to improve the fit to the body surface, it is common to provide stretchability at appropriate positions such as around the legs and around the trunk. As a method for imparting stretchability, conventionally, a method of attaching an elongated elastic stretchable member such as rubber thread in a stretched state in the longitudinal direction has been widely adopted, but it is desired to impart stretchability to some extent. In such a case, a mode is adopted 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 film in a stretched state in a stretchable direction has also been proposed. (For example, refer to Patent Document 1).

この弾性フィルムによる伸縮構造(以下、弾性フィルム伸縮構造ともいう)は、伸縮領域が第1シート層と、第2シート層との間に弾性フィルムが積層されてなるとともに、弾性フィルムがそれらの表面に沿う伸縮方向に伸長された状態で、第1シート層及び第2シート層が、伸縮方向及びこれと直交する方向にそれぞれ間隔を空けて配列された多数の点状のシート接合部で、弾性フィルムに形成された貫通孔を通じて接合されてなるものである。このような弾性フィルム伸縮構造は、自然長状態では、シート接合部間において弾性フィルム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収縮皺が形成される。反対に伸長時には、シート接合部間において弾性フィルム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シート層における収縮皺が広がり、第1シート層及び第2シート層の完全展開状態まで弾性伸長が可能となる。この弾性フィルム伸縮構造は、面的なフィット性に優れるのはもちろん、第1シート層及び第2シート層と弾性フィルムとの接合が無く、かつ第1シート層及び第2シート層の接合も極めて少ないため非常に柔軟であり、また、弾性フィルムの貫通孔が通気性向上にも寄与するという利点がある。   This elastic film stretchable structure (hereinafter also referred to as an elastic film stretchable structure) has a stretchable region in which an elastic film is laminated between a first sheet layer and a second sheet layer, and the elastic film is on the surface thereof. In a state where the first sheet layer and the second sheet layer are stretched in the expansion / contraction direction along the direction of the elastic sheet, the first sheet layer and the second sheet layer are elastic at a large number of dotted sheet joint portions arranged at intervals in the expansion / contraction direction and the direction orthogonal thereto. They are joined through through-holes formed in the film. Such an elastic film stretchable structure is such that, in the natural length state, as the elastic film contracts between the sheet joining portions, the interval between the sheet joining portions becomes narrow, and the sheet joining portions in the first sheet layer and the second sheet layer A contraction fold extending in the direction intersecting the expansion / contraction direction is formed therebetween. On the other hand, when the elastic film is stretched between the sheet joining portions at the time of stretching, the spacing between the sheet joining portions and the shrinkage wrinkles in the first sheet layer and the second sheet layer spread, and the first sheet layer and the second sheet layer Elastic extension is possible up to the fully deployed state. This elastic film stretchable structure is excellent in surface fit, and there is no bonding between the first sheet layer and the second sheet layer and the elastic film, and the first sheet layer and the second sheet layer are extremely bonded. Since there are few, it is very flexible, and there exists an advantage that the through-hole of an elastic film contributes also to air permeability improvement.

他方で、吸収体物品においては、任意の部分にのみ伸縮性を付与する場合であっても、製造を容易にするために、伸縮性を付与する伸縮領域を含めた広範囲に弾性伸縮部材を取り付けた後、伸縮性が不要な非伸縮領域については、弾性伸縮部材による収縮力が作用しない状態に加工する(以下、伸縮性を殺すともいう)ことが行われてきた。例えば、パンツタイプ使い捨ておむつの胴周りに幅方向の伸縮性を付与する場合、幅方向全体にわたり細長状弾性伸縮部材を取り付けた後、吸収体と重なる幅方向中央部を細かく切断し、当該部分の伸縮性を殺し、非伸縮領域とすることが広く行われている。   On the other hand, in the absorbent article, an elastic elastic member is attached over a wide range including an elastic region for imparting elasticity, in order to facilitate manufacturing even if elasticity is imparted only to an arbitrary part. After that, the non-stretchable region that does not require stretchability has been processed to a state where the contraction force by the elastic stretchable member does not act (hereinafter also referred to as killing stretchability). For example, when imparting stretchability in the width direction around the trunk of a pants-type disposable diaper, after attaching an elongated elastic stretch member over the entire width direction, finely cut the widthwise center portion overlapping the absorber, It is widely practiced to kill stretchability and make it a non-stretchable region.

しかし、糸ゴムを用いた伸縮構造において糸ゴムの切断により伸縮性を殺す手法は、弾性フィルム伸縮構造にそのまま応用するとすれば、少なくとも非伸縮領域において伸縮方向と交差する方向に弾性フィルム全体を切断することになり、広範囲にわたり連続的な切断が必要となるため、第1シート層及び第2シート層が切断されるおそれや、切断されないとしても第1シート層及び第2シート層に切断痕跡(溶融痕跡や加圧痕跡)が連続的に残るおそれがある。また、製造も困難である。   However, in the elastic structure using thread rubber, the method of killing the elasticity by cutting the rubber thread is applied to the elastic film elastic structure as it is. Therefore, since continuous cutting is required over a wide range, the first sheet layer and the second sheet layer may be cut, or even if not cut, the first sheet layer and the second sheet layer may have a cutting trace ( There is a risk that a trace of melting or trace of pressure) will remain continuously. Also, it is difficult to manufacture.

特表2004−532758号公報JP-T-2004-532758

そこで本発明の主たる課題は、弾性フィルム伸縮構造の非伸縮領域において、見栄え悪化の防止、柔軟性の低下の防止、及び非伸縮性の向上を図ることにある。   Therefore, the main problem of the present invention is to prevent deterioration in appearance, prevention of deterioration in flexibility, and improvement in non-stretchability in the non-stretch region of the elastic film stretch structure.

上記課題を解決した本発明は次のとおりである。
<請求項1記載の発明>
排泄物を吸収する吸収体を備えた吸収性物品において、
第1シート層及び第2シート層の間に弾性フィルムが積層されるとともに、前記第1シート層及び第2シート層が、間隔を空けて配列された多数のシート接合部で前記弾性フィルムを貫通する貫通孔を通じて接合された弾性フィルム伸縮構造を備えており、
この弾性フィルム伸縮構造を有する領域は、一方向に伸縮可能な伸縮領域と、この伸縮領域の少なくとも伸縮方向一方側に設けられた非伸縮領域とを有しており、
前記伸縮領域は、前記弾性フィルムが前記伸縮方向に沿って直線的に連続する部分を有しており、かつ前記弾性フィルムの収縮力により前記伸縮方向に収縮しているとともに、前記伸縮方向に伸長可能であり、
前記非伸縮領域は、前記弾性フィルムが前記伸縮方向に連続するものの、前記貫通孔の存在により前記伸縮方向に沿って直線的に連続する部分を有しない、前記伸縮方向の弾性限界伸びが100%の領域である、
ことを特徴とする吸収性物品。
The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
In an absorbent article provided with an absorber that absorbs excreta,
An elastic film is laminated between the first sheet layer and the second sheet layer, and the first sheet layer and the second sheet layer penetrate the elastic film at a number of sheet joint portions arranged at intervals. It has an elastic film stretchable structure joined through through-holes,
The region having the elastic film stretchable structure has a stretchable region that can stretch in one direction and a non-stretchable region provided on at least one stretchable direction side of the stretchable region,
The stretchable region has a portion in which the elastic film is linearly continuous along the stretchable direction, and contracts in the stretchable direction due to the shrinkage force of the elastic film and extends in the stretchable direction. Is possible,
The non-stretchable region has an elastic limit elongation of 100% in the stretch direction, although the elastic film continues in the stretch direction, but does not have a linearly continuous portion along the stretch direction due to the presence of the through hole. Which is the area of
An absorbent article characterized by the above.

(作用効果)
本発明のような弾性フィルム伸縮構造では、弾性フィルムが伸縮方向に沿って直線的に連続する部分では、当該連続部分の伸縮により伸縮性を有するが、伸縮方向に沿って直線的に連続しない部分では弾性フィルムの収縮力が第1シート層及び第2シート層にほとんど作用しないため、伸縮性がほぼ消失し、弾性限界伸びは100%に近くなる。よって、弾性フィルムが伸縮方向に沿って直線的に連続しない部分の有無により伸縮領域及び非伸縮領域を形成することができる。
そしてこのような非伸縮領域では、第1シート層及び第2シート層が間隔を空けて配列された多数のシート接合部で接合されており、シート接合部が連続的とならないため、柔軟性の低下は防止される。また、非伸縮領域でも弾性フィルムの連続性が残っており、弾性フィルムの独立切断片が残ることもなく、またほとんど皺も形成されないため、極めて見栄えが良く、かつ貫通孔による厚み方向の通気性が確保される。それでいて、伸縮性をほぼ殺すことができるのである。
(Function and effect)
In the elastic film stretchable structure as in the present invention, in the portion where the elastic film is linearly continuous along the stretch direction, the stretchable portion is stretched by the stretch of the continuous portion, but the portion is not linearly continuous along the stretch direction Then, since the shrinkage force of the elastic film hardly acts on the first sheet layer and the second sheet layer, the stretchability is almost lost, and the elastic limit elongation is close to 100%. Therefore, the stretchable region and the non-stretchable region can be formed depending on the presence or absence of a portion where the elastic film does not continue linearly along the stretch direction.
In such a non-stretchable region, the first sheet layer and the second sheet layer are joined by a large number of sheet joints arranged at intervals, and the sheet joints are not continuous, so that the flexibility A decline is prevented. In addition, the continuity of the elastic film remains even in the non-stretchable region, and there is no independent cut piece of the elastic film and almost no wrinkles are formed. Is secured. Nevertheless, stretchability can be almost killed.

<請求項2記載の発明>
排泄物を吸収する吸収体を備えた吸収性物品において、
第1シート層及び第2シート層の間に弾性フィルムが積層されるとともに、前記第1シート層及び第2シート層が、間隔を空けて配列された多数のシート接合部で前記弾性フィルムを貫通する貫通孔を通じて接合された弾性フィルム伸縮構造を備えており、
この弾性フィルム伸縮構造を有する領域は、一方向に伸縮可能な伸縮領域と、この伸縮領域の少なくとも伸縮方向一方側に設けられた非伸縮領域とを有しており、
前記伸縮領域は、前記弾性フィルムが前記伸縮方向に沿って直線的に連続する部分を有しており、かつ前記弾性フィルムの収縮力により前記伸縮方向に収縮しているとともに、前記伸縮方向に伸長可能であり、
前記非伸縮領域は、前記弾性フィルムが前記伸縮方向に連続するものの、前記貫通孔の存在により前記伸縮方向に沿って直線的に連続する部分を有しない領域であり、
前記非伸縮領域の全体にわたり、前記弾性フィルムを貫通する貫通孔が千鳥状に配置されており、前記貫通孔の前記伸縮方向の中心間隔が前記貫通孔の前記伸縮方向の長さより短く、前記貫通孔の前記伸縮方向と直交する方向の中心間隔が前記貫通孔の前記伸縮方向と直交する方向の長さより短い、
ことを特徴とする吸収性物品。
<Invention of Claim 2>
In an absorbent article provided with an absorber that absorbs excreta,
An elastic film is laminated between the first sheet layer and the second sheet layer, and the first sheet layer and the second sheet layer penetrate the elastic film at a number of sheet joint portions arranged at intervals. It has an elastic film stretchable structure joined through through-holes,
The region having the elastic film stretchable structure has a stretchable region that can stretch in one direction and a non-stretchable region provided on at least one stretchable direction side of the stretchable region,
The stretchable region has a portion in which the elastic film is linearly continuous along the stretchable direction, and contracts in the stretchable direction due to the shrinkage force of the elastic film and extends in the stretchable direction. Is possible,
The non-stretchable region is a region that does not have a linearly continuous portion along the stretchable direction due to the presence of the through-holes, although the elastic film is continuous in the stretchable direction.
Through holes that penetrate the elastic film are arranged in a staggered manner throughout the non-stretchable region, and the center interval in the stretch direction of the through holes is shorter than the length of the through holes in the stretch direction, and the through holes The center interval in the direction orthogonal to the expansion / contraction direction of the hole is shorter than the length of the through hole in the direction orthogonal to the expansion / contraction direction,
An absorbent article characterized by the above .

(作用効果)
本項記載のような間欠パターンで弾性フィルムに貫通孔を形成することにより、弾性フィルムの連続性を維持しつつ伸縮方向の直線連続性をほぼ完全に無くすことができるため好ましい。なお、用語「中心間隔」は、対象が点対称な図形でない場合には重心間隔を意味する(以下同じ)。
(Function and effect)
Forming the through-holes in the elastic film in the intermittent pattern as described in this section is preferable because linear continuity in the expansion / contraction direction can be almost completely eliminated while maintaining the continuity of the elastic film. Note that the term “center interval” means the center-of-gravity interval when the object is not a point-symmetric graphic (the same applies hereinafter).

<請求項3記載の発明>
前記弾性フィルムを前記伸縮方向に4倍に伸長したときの伸長応力が4〜12N/35mmのものであり、
前記非伸縮領域を前記伸縮方向に弾性限界まで伸ばした状態で、前記貫通孔の前記伸縮方向の中心間隔が0.7〜3.0mm、前記貫通孔の前記伸縮方向の長さが1.0〜4.5mm、前記貫通孔の前記伸縮方向と直交する方向の中心間隔が1.2〜5.25mm、かつ前記貫通孔の前記伸縮方向と直交する方向の長さが0.7〜3.0mmである、請求項2記載の吸収性物品。
<Invention of Claim 3>
The stretching stress when the elastic film is stretched four times in the stretch direction is 4 to 12 N / 35 mm,
In a state where the non-stretchable region is extended to the elastic limit in the stretchable direction, the center interval in the stretchable direction of the through hole is 0.7 to 3.0 mm, and the length of the throughhole in the stretchable direction is 1.0. -4.5 mm, the center interval in the direction perpendicular to the expansion / contraction direction of the through hole is 1.2-5.25 mm, and the length of the through hole in the direction orthogonal to the expansion / contraction direction is 0.7-3. The absorptive article according to claim 2 which is 0 mm.

(作用効果)
本項記載の範囲の弾性フィルムを用いる場合、非伸縮領域における貫通孔の寸法及び配置間隔は本項記載の範囲内であると好ましい。なお、非伸縮領域を伸縮方向に弾性限界まで伸ばした状態(換言すれば第1シート層及び第2シート層が完全に展開した状態)では、貫通孔の伸縮方向の中心間隔はシート接合部の伸縮方向の中心間隔に等しく、貫通孔の伸縮方向と直交する方向の中心間隔はシート接合部の伸縮方向と直交する方向の中心間隔に等しく、貫通孔の伸縮方向と直交する方向の長さはシート接合部の伸縮方向と直交する方向の長さに等しい。
(Function and effect)
When the elastic film in the range described in this section is used, it is preferable that the size and arrangement interval of the through holes in the non-stretchable region are within the range described in this section. In the state where the non-stretchable region is stretched to the elastic limit in the stretch direction (in other words, the first sheet layer and the second sheet layer are completely deployed), the center interval in the stretch direction of the through hole is the sheet joint portion. The center interval in the direction perpendicular to the expansion / contraction direction of the through hole is equal to the center interval in the expansion / contraction direction, and the center interval in the direction orthogonal to the expansion / contraction direction of the sheet joint is equal to the length of the through hole in the direction orthogonal to the expansion / contraction direction. It is equal to the length in the direction orthogonal to the expansion / contraction direction of the sheet joint.

<請求項4記載の発明>
前記非伸縮領域では、前記シート接合部における前記第1シート層及び第2シート層の間以外では、前記第1シート層及び第2シート層と前記弾性フィルムとが接合されておらず、かつ自然長の状態で前記シート接合部の前記伸縮方向両側に前記弾性フィルムの貫通孔の周縁及び前記シート接合部が離間されて形成された隙間を有している、請求項3記載の吸収性物品。
<Invention of Claim 4>
In the non-stretchable region, the first sheet layer, the second sheet layer, and the elastic film are not bonded to each other except between the first sheet layer and the second sheet layer in the sheet bonding portion, and are naturally The absorptive article according to claim 3 which has the crevice formed by separating the peripheral edge of the penetration hole of said elastic film, and said sheet joined part on both sides of said expansion-contraction direction of said sheet joined part in the state of length.

(作用効果)
非伸縮領域にこのよう隙間が形成されていると、弾性フィルムの素材が無孔のフィルムやシートであっても、この隙間により常に通気性が付加されるため好ましい。
(Function and effect)
It is preferable that such a gap is formed in the non-stretchable region because even if the material of the elastic film is a non-porous film or sheet, air permeability is always added by this gap.

<請求項5記載の発明>
前記伸縮領域は、前記伸縮方向の弾性限界伸びが200%以上とされており、前記非伸縮領域は、前記伸縮方向の弾性限界伸びが120%以下とされている、請求項1〜4のいずれか1項に記載の吸収性物品。
<Invention of Claim 5>
The elastic region has an elastic limit elongation of 200% or more in the expansion / contraction direction, and the non-contraction region has an elastic limit elongation of 120% or less in the expansion / contraction direction. The absorbent article of Claim 1.

(作用効果)
伸縮領域及び非伸縮領域の弾性限界伸びは適宜定めることができるが、本項記載の範囲内とされていることが好ましい。
(Function and effect)
The elastic limit elongation of the stretchable region and the non-stretchable region can be determined as appropriate, but is preferably within the range described in this section.

<請求項6記載の発明>
前身頃及び後身頃を構成する外装体と、この外装体に固定された、吸収体を含む内装体とを備え、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てサイドシール部が形成されることにより、胴周り部が環状に形成されるとともに、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であって、
前記前身頃及び後身頃の少なくとも一方における前記外装体の胴周り部は、前記吸収体と重なる前後方向範囲として定まる吸収体領域を有しており、少なくともこの吸収体領域における前記サイドシール部間に対応する幅方向範囲にわたり前記弾性フィルム伸縮構造を、その伸縮方向が幅方向となるように備えており、
前記吸収体領域は、その幅方向中間部が前記非伸縮領域とされるとともに、この非伸縮領域と前記サイドシール部との間に対応する幅方向範囲が前記伸縮領域とされている、
請求項1〜5のいずれか1項に記載の吸収性物品。
<Invention of Claim 6>
An exterior body constituting the front body and the back body, and an interior body including an absorber fixed to the exterior body, both sides of the exterior body in the front body and both sides of the exterior body in the back body are respectively A pants type disposable diaper in which a waist portion and a pair of left and right leg openings are formed while a waistline portion is formed in an annular shape by joining and forming a side seal part,
The waist portion of the exterior body in at least one of the front body and the back body has an absorber region that is defined as a front-rear direction range that overlaps the absorber, and at least between the side seal portions in the absorber region. The elastic film stretchable structure is provided over the corresponding width direction range so that the stretch direction is the width direction,
The absorber region has a width direction intermediate portion as the non-stretchable region, and a width direction range corresponding to the space between the non-stretchable region and the side seal portion is the stretchable region.
The absorbent article of any one of Claims 1-5.

(作用効果)
パンツタイプ使い捨ておむつの外装体における吸収体と重なる部分は、製造上の理由により弾性フィルムを配置させることが望ましいものの伸縮が不要な領域である。よって、この吸収体と重なる部分を含めて、表示部分を含む非伸縮領域を形成するのは好ましい。
(Function and effect)
The portion of the outer body of the pants-type disposable diaper that overlaps the absorbent body is an area where it is desirable to dispose an elastic film for manufacturing reasons, but does not need to be stretched. Therefore, it is preferable to form a non-stretchable region including a display portion including a portion overlapping this absorber.

<請求項7記載の発明>
前記弾性フィルム伸縮構造が前記ウエスト端部領域まで延在されておらず、
前記ウエスト端部領域における、前記サイドシール部間に対応する幅方向範囲全体が、幅方向に沿って取り付けられた細長状のウエスト部弾性部材の収縮力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、伸縮領域とされている、請求項6記載の吸収性物品。
<Invention of Claim 7>
The elastic film stretchable structure does not extend to the waist end region,
The entire width direction range corresponding to the space between the side seal portions in the waist end region is contracted in the width direction by the contraction force of the elongated waist elastic member attached along the width direction. The absorbent article according to claim 6, wherein the absorbent article is a stretchable region that is stretchable.

(作用効果)
ウエスト端部領域に弾性フィルム伸縮構造を用いると、ウエスト端部領域の締め付けが不十分になる場合等、必要に応じてウエスト端部領域には弾性フィルム伸縮構造を設けずに、従来の細長状の弾性伸縮部材による伸縮構造を設けることもできる。
(Function and effect)
If an elastic film stretchable structure is used for the waist end region, the waist end region is not provided with an elastic film stretchable structure as required, such as when the tightening of the waist end region is insufficient. It is also possible to provide an expansion / contraction structure using an elastic expansion / contraction member.

以上のとおり、本発明によれば、弾性フィルム伸縮構造の非伸縮領域において、見栄え悪化の防止、柔軟性の低下の防止、及び非伸縮性の向上を図ることができる、等の利点がもたらされる。   As described above, according to the present invention, in the non-stretchable region of the elastic film stretchable structure, there are advantages such as prevention of deterioration of appearance, prevention of lowering of flexibility, and improvement of nonstretchability. .

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. サンプルの伸縮領域の(a)平面方向からの顕微鏡写真、(b)平面方向からの高倍率顕微鏡写真、(c)斜視方向からの高倍率顕微鏡写真である。It is the (a) microscope picture from a plane direction of the expansion-contraction area | region of a sample, (b) the high magnification microscope picture from a plane direction, (c) The high magnification microscope picture from a perspective direction. (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. サンプルの伸縮領域の(a)平面方向からの顕微鏡写真、(b)平面方向からの高倍率顕微鏡写真、(c)斜視方向からの高倍率顕微鏡写真である。It is the (a) microscope picture from a plane direction of the expansion-contraction area | region of a sample, (b) the high magnification microscope picture from a plane direction, (c) The high magnification microscope picture from a perspective direction. (a)は非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 a non-expandable 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. サンプルの非伸縮領域の写真である。It is a photograph of the non-stretchable region of the sample. 非伸縮領域の要部平面図である。It is a principal part top view of a non-expandable area | region. 非伸縮領域の要部平面図である。It is a principal part top view of a non-expandable area | region. 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. (a)は図15のC−C断面図、(b)は図15のE−E断面図である。(A) is CC sectional drawing of FIG. 15, (b) is EE sectional drawing of FIG. 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. 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)第1溶着形態で形成されたシート接合部の平面写真、(b)第3溶着形態で形成されたシート接合部の平面写真である。(A) The plane photograph of the sheet | seat junction part formed with the 1st welding form, (b) The plane photograph of the sheet | seat junction part formed with the 3rd welding form. 超音波シール装置の概略図である。It is the schematic of an ultrasonic sealing apparatus. シート接合部の各種配列例を示す平面図である。It is a top view which shows the various arrangement | sequence examples of a sheet | seat junction part.

以下、本発明の一実施形態について、添付図面を参照しつつ詳説する。なお、断面図中の点模様部分はホットメルト接着剤等の接合手段を示している。
図1〜図6はパンツタイプ使い捨ておむつを示している。このパンツタイプ使い捨ておむつ(以下、単におむつともいう。)は、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(縦方向)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レッグ開口が形成されたパンツタイプ使い捨ておむつとなる。
Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, the dotted pattern part in sectional drawing has shown joining means, such as a hot-melt-adhesive.
1 to 6 show a pants-type disposable diaper. 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 has an absorbent body 13 interposed 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. Are folded at the center in the front-rear direction (longitudinal direction), and the side seal portions 21 are formed by joining both sides thereof by heat welding or hot melt adhesive, thereby forming a waist opening and a pair of left and right A pants-type disposable diaper with a leg opening.

(内装体の構造例)
内装体10は、図4〜図6に示すように、液透過性トップシート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 interior body 10 has a structure in which an absorbent body 13 is interposed between a liquid-permeable top sheet 11 and a liquid-impermeable sheet 12 made of polyethylene or the like. In addition, the excretory fluid that has passed through the top sheet 11 is absorbed and held. 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)を覆う液透過性トップシート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。不織布を構成する素材繊維は、ポリエチレン又はポリプロピレン等のオレフィン系、ポリエステル系、ポリアミド系等の合成繊維の他、レーヨンやキュプラ等の再生繊維、綿等の天然繊維とすることができ、スパンレース法、スパンボンド法、サーマルボンド法、メルトブローン法、ニードルパンチ法等の適宜の加工法によって得られた不織布を用いることができる。これらの加工法の内、スパンレース法は柔軟性、ドレープ性に富む点で優れ、サーマルボンド法は嵩高でソフトである点で優れている。液透過性トップシート11に多数の透孔を形成した場合には、尿などが速やかに吸収されるようになり、ドライタッチ性に優れたものとなる。液透過性トップシート11は、吸収体13の側縁部を巻き込んで吸収体13の裏側まで延在している。   As the liquid-permeable 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. The material fibers that make up the nonwoven fabric can be synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or polyamide, recycled fibers such as rayon or cupra, natural fibers such as cotton, and the spunlace method. A nonwoven fabric obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. When a large number of through holes are formed in the liquid permeable top sheet 11, urine and the like are quickly absorbed, and the dry touch property is excellent. The liquid-permeable top sheet 11 is wound around the side edge of the absorber 13 and extends to the back side of the absorber 13.

吸収体13の裏側(非肌当接側)を覆う液不透過性シート12は、ポリエチレン又はポリプロピレンなどの液不透過性プラスチックシートが用いられるが、近年はムレ防止の点から透湿性を有するものが好適に用いられる。この遮水・透湿性シートは、例えばポリエチレンやポリプロピレン等のオレフィン樹脂中に無機充填材を溶融混練してシートを形成した後、一軸又は二軸方向に延伸することにより得られる微多孔性シートである。   As the liquid-impermeable sheet 12 covering the back side (non-skin contact side) of the absorbent body 13, a liquid-impermeable plastic sheet such as polyethylene or polypropylene is used, but in recent years, it has moisture permeability from the viewpoint of preventing stuffiness. Are preferably used. This water-impervious and moisture-permeable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. is there.

吸収体13としては、公知のもの、例えばパルプ繊維の積繊体、セルロースアセテート等のフィラメントの集合体、あるいは不織布を基本とし、必要に応じて高吸収性ポリマーを混合、固着等してなるものを用いることができる。この吸収体13は、形状及びポリマー保持等のため、必要に応じてクレープ紙等の、液透過性及び液保持性を有する包装シート14によって包装することができる。
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が、長方形状等、適宜の意形状とすることができる。括れ部分13Nの寸法は適宜定めることができるが、括れ部分13Nの前後方向長さはおむつ全長の20〜50%程度とすることができ、その最も狭い部分の幅は吸収体13の全幅の40〜60%程度とすることができる。このような括れ部分13Nを有する場合において、内装体10の平面形状が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を有しない余り部分が形成される。
Absorbent body 13 is a known one, for example, a pulp fiber stack, a filament aggregate such as cellulose acetate, or a non-woven fabric, mixed with a superabsorbent polymer as necessary, fixed, etc. Can be used. The absorbent body 13 can be packaged with a wrapping sheet 14 having liquid permeability and liquid retention, such as crepe paper, if necessary, for holding the shape and polymer.
The shape of the absorber 13 is formed in a substantially hourglass shape having a narrowed portion 13N having a narrower width than the front and rear sides in the crotch portion, but may be an appropriate shape such as a rectangular shape. Although the size of the constricted portion 13N can be determined as appropriate, the length in the front-rear direction of the constricted portion 13N can be about 20 to 50% of the total length of the diaper, and the width of the narrowest portion is 40% of the total width of the absorber 13. It can be about -60%. In the case of having such a constricted portion 13N, if the planar shape of the interior body 10 is substantially rectangular, the remainder of the interior body 10 that does not have the absorber 13 in the portion corresponding to the constricted portion 13N of the absorber 13 A part is formed.

内装体10の両側部には脚周りにフィットする立体ギャザーBSが形成されている。この立体ギャザーBSは、図5及び図6に示されるように、内装体の裏面の側部に固定された固定部と、この固定部から内装体の側方を経て内装体の表面の側部まで延在する本体部と、本体部の前後端部が倒伏状態で内装体の表面の側部に固定されて形成された倒伏部分と、この倒伏部分間が非固定とされて形成された自由部分とが、折り返しによって二重シートとしたギャザー不織布15により形成されている。   A solid gather BS that fits around the legs is formed on both sides of the interior body 10. As shown in FIGS. 5 and 6, the three-dimensional gather BS includes a fixed portion fixed to a side portion on the back surface of the interior body, and a side portion on the surface of the interior body from the fixed portion to the side of the interior body. The body part that extends to the front, the front and rear ends of the body part in a lying state, and the lying part that is fixed to the side of the surface of the interior body, and the freedom part that is formed with this lying part being unfixed The part is formed of a gathered nonwoven fabric 15 that is turned into a double sheet by folding.

また、二重シート間には、自由部分の先端部等に細長状ギャザー弾性部材16が配設されている。ギャザー弾性部材16は、製品状態において図5に二点鎖線で示すように、弾性伸縮力により自由部分を起立させて立体ギャザーBSを形成するためのものである。   Further, between the double sheets, an elongated gather elastic member 16 is disposed at the tip of the free part. The gather elastic member 16 is for forming a three-dimensional gather BS by raising a free part by elastic stretching force as shown by a two-dot chain line in FIG. 5 in the product state.

液不透過性シート12は、液透過性トップシート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 on the both sides in the width direction of the absorber 13 together with the liquid-permeable top sheet 11. 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.

ギャザー弾性部材16としては、通常使用されるスチレン系ゴム、オレフィン系ゴム、ウレタン系ゴム、エステル系ゴム、ポリウレタン、ポリエチレン、ポリスチレン、スチレンブタジエン、シリコン、ポリエステル等の素材を用いることができる。また、外側から見え難くするため、太さは925dtex以下、テンションは150〜350%、間隔は7.0mm以下として配設するのがよい。なお、ギャザー弾性部材16としては、図示形態のような糸状の他、ある程度の幅を有するテープ状のものを用いることもできる。   As the gathered elastic member 16, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, 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. The gathered elastic member 16 may be a tape-like member having a certain width in addition to the thread-like shape shown in the figure.

前述のギャザー不織布15を構成する素材繊維も液透過性トップシート11と同様に、ポリエチレン又はポリプロピレン等のオレフィン系、ポリエステル系、アミド系等の合成繊維の他、レーヨンやキュプラ等の再生繊維、綿等の天然繊維とすることができ、スパンボンド法、サーマルボンド法、メルトブローン法、ニードルパンチ法等の適宜の加工方法に得られた不織布を用いることができるが、特にはムレを防止するために坪量を抑えて通気性に優れた不織布を用いるのがよい。さらにギャザー不織布15については、尿などの透過を防止するとともに、カブレを防止しかつ肌への感触性(ドライ感)を高めるために、シリコン系、パラフィン金属系、アルキルクロミッククロイド系撥水剤などをコーティングした撥水処理不織布を用いるのが望ましい。   In the same manner as the liquid-permeable top sheet 11, the material fibers constituting the gathered nonwoven fabric 15 are olefin-based, polyester-based, amide-based synthetic fibers such as polyethylene or polypropylene, recycled fibers such as rayon and cupra, and cotton. Non-woven fabric obtained by an appropriate processing method such as a spunbond method, a thermal bond method, a melt blown method, a needle punch method, etc. can be used. It is preferable to use a nonwoven fabric that suppresses the basis weight and has excellent air permeability. Furthermore, for the gathered nonwoven fabric 15, in order to prevent the transmission of urine and the like, to prevent fogging, and to enhance the touch to the skin (dry feeling), silicon-based, paraffin metal-based, alkylchromic croid-based water repellent, etc. It is desirable to use a water-repellent non-woven fabric coated with.

図3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固定される。この内外固定領域10Bは、一方の無吸収体側部17から他方の無吸収体側部17にわたる幅で、無吸収体側部17の前後両側にわたり延在される。内外固定領域10Bの側縁は、無吸収体側部17の幅方向中間より側方に位置していることが好ましく、特に内装体10の幅方向のほぼ全体、及び前後方向のほぼ全体にわたり外装体20に固定されているとより好ましい。   As shown in FIG. 3, the back surface of the interior body 10 is fixed to the inner surface of the exterior body 20 with a hot melt adhesive or the like in the inner / outer fixing area 10 </ b> B (shaded area). This inner / outer fixed region 10 </ b> B extends across the front and rear sides of the non-absorbent body side portion 17 with a width extending from one non-absorbent body side portion 17 to the other non-absorbent body side portion 17. The side edge of the inner / outer fixing region 10B is preferably located laterally from the middle in the width direction of the non-absorbent body side portion 17, and in particular, the exterior body over almost the whole width direction of the interior body 10 and almost the whole front and rear direction. More preferably, it is fixed to 20.

(外装体の構造例)
外装体20は吸収体13の側縁より側方まで延在されている。この限りで、外装体20は図示形態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。また、外装体20は、サイドシール部21と対応する前後方向範囲である胴周り部Tと、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とを有する。そして、図示形態の外装体20では、その中間部Lの前後方向中間を除いて、図2及び図4〜図6に示されるように、第1シート層20A及び第2シート層20Bの間に弾性フィルム30が積層されるとともに、図7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で弾性フィルム30を貫通する貫通孔31を通じて接合された、伸縮方向が幅方向とされた弾性フィルム伸縮構造20Xを有している。外装体20の平面形状は、中間部Lの幅方向両側縁がそれぞれレッグ開口を形成するように凹状の脚周りライン29により形成されており、全体として擬似砂時計形状をなしている。外装体20は、前後に二分割し、両者が股間部で前後方向に離間するように配置しても良い。
(External body structure example)
The exterior body 20 extends from the side edge of the absorber 13 to the side. As long as this is the case, the exterior body 20 is located in the crotch portion even if the side edge of the exterior body 20 is located on the center side in the width direction from the side edge of the interior body 10 or on the outer side in the width direction. Also good. Further, the exterior body 20 is a front-rear direction range between a waistline T corresponding to the side seal portion 21 and a front-rear range, a waistline T of the front body F, and a waistline T of the back body B. And an intermediate portion L. And in the exterior body 20 of the illustrated form, as shown in FIG. 2 and FIGS. 4 to 6 except for the middle in the front-rear direction of the intermediate portion L, between the first sheet layer 20A and the second sheet layer 20B. While the elastic film 30 is laminated, as shown in FIG. 7, the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B penetrate the elastic film 30 with a large number of sheet joint portions 40 arranged at intervals. It has the elastic film expansion-contraction structure 20X joined through the through-hole 31, and the expansion-contraction direction was made into the width direction. The planar shape of the exterior body 20 is formed by concave leg-around lines 29 so that both side edges of the intermediate portion L in the width direction form leg openings, respectively, and has a pseudo hourglass shape as a whole. The exterior body 20 may be divided into two parts in the front-rear direction so that both are separated in the front-rear direction at the crotch part.

図1及び図2に示す形態は、弾性フィルム伸縮構造20Xがウエスト端部領域23まで延在されている形態であるが、ウエスト端部領域23に弾性フィルム伸縮構造20Xを用いると、ウエスト端部領域23の締め付けが不十分になる等、必要に応じて、図15及び図16に示すようにウエスト端部領域23には弾性フィルム伸縮構造20Xを設けずに、従来の細長状のウエスト部弾性部材24による伸縮構造20Xを設けることもできる。ウエスト部弾性部材24は、前後方向に間隔をおいて配置された複数の糸ゴム等の細長状弾性部材であり、身体の胴周りを締め付けるように伸縮力を与えるものである。ウエスト部弾性部材24は、間隔を密にして実質的に一束として配置されるのではなく、所定の伸縮ゾーンを形成するように3〜8mm程度の間隔を空けて、3本以上、好ましくは5本以上配置される。ウエスト部弾性部材24の固定時の伸長率は適宜定めることができるが、通常の成人用の場合230〜320%程度とすることができる。ウエスト部弾性部材24は、図示例では糸ゴムを用いたが、例えば平ゴム等、他の細長状の伸縮部材を用いても良い。   The form shown in FIGS. 1 and 2 is a form in which the elastic film stretchable structure 20X extends to the waist end region 23, but when the elastic film stretchable structure 20X is used for the waist end region 23, the waist end portion is used. If necessary, as shown in FIGS. 15 and 16, the waist end region 23 is not provided with the elastic film stretchable structure 20X as shown in FIGS. A telescopic structure 20 </ b> X by the member 24 can also be provided. The waist elastic member 24 is an elongated elastic member such as a plurality of thread rubbers arranged at intervals in the front-rear direction, and gives an elastic force so as to tighten around the body torso. The waist elastic members 24 are not arranged substantially as a single bundle with a close interval, but with a spacing of about 3 to 8 mm so as to form a predetermined stretch zone, preferably three or more, preferably Five or more are arranged. The stretch rate at the time of fixing the waist elastic member 24 can be determined as appropriate, but can be about 230 to 320% in the case of a normal adult. For the waist elastic member 24, thread rubber is used in the illustrated example, but other elongated elastic members such as flat rubber may be used.

他の形態としては、図示しないが、前身頃Fの胴周り部Tと後身頃Bの胴周り部Tとの間の中間部Lには弾性フィルム伸縮構造20Xを設けない形態としたり、前身頃Fの胴周り部T内から中間部Lを経て後身頃Bの胴周り部T内まで前後方向に連続的に伸縮構造20Xを設けたり、前身頃F及び後身頃Bのいずれか一方にのみ弾性フィルム伸縮構造20Xを設けたりすることも可能である。   As other forms, although not shown in the figure, the middle part L between the waist part T of the front body F and the waist part T of the back body B is not provided with an elastic film stretchable structure 20X. A stretchable structure 20X is continuously provided in the front-rear direction from the inside of the waist T of the F to the inside of the waist T of the back body B through the intermediate part L, or only one of the front body F and the back body B is elastic. It is also possible to provide a film stretchable structure 20X.

個々のシート接合部40及び貫通孔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(図7、図8参照)、楕円形、三角形、長方形(図9〜図12参照)、ひし形(図13(b)参照)等の多角形、あるいは凸レンズ形(図13(a)参照)、凹レンズ形(図14(a)参照)、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に長い形状の場合には0.1〜1.1mmとするのが好ましい。   Although the shape in the natural length state of each sheet | seat junction part 40 and the through-hole 31 can be determined suitably, a perfect circle (refer FIG. 7, FIG. 8), an ellipse, a triangle, a rectangle (refer FIG. 9-12). ), Rhombus (see FIG. 13B), etc., or convex lens shape (see FIG. 13A), concave lens shape (see FIG. 14A), star shape, cloud shape, etc. be able to. The dimensions of the individual sheet joints are not particularly limited, but the maximum length is preferably 0.5 to 3.0 mm, particularly preferably 0.7 to 1.1 mm, and the maximum width 40x is 0.1 to 3.0 mm. In particular, when the shape is long in the direction orthogonal to the expansion and contraction direction, the thickness is preferably 0.1 to 1.1 mm.

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。個々の貫通孔31の開口の面積は、貫通孔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、貫通孔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、貫通孔31の開口の面積が、弾性フィルム30の表と裏で異なる等、厚み方向に均一でない場合には最小値を意味する。 The size of each 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 through hole 31 may be equal to or greater than the sheet joint portion because the sheet joint portion is formed through the through hole 31, but is about 1 to 1.5 times the area of the sheet joint portion. It is preferable. In addition, the area of the opening of the through-hole 31 means a value in a state of being integrated with the first sheet layer 20A and the second sheet layer 20B, not in the 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.

シート接合部40及び貫通孔31の平面配列は適宜定めることができるが、規則的に繰り返される平面配列が好ましく、図21(a)に示すような斜方格子状や、図21(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21(c)に示すような正方格子状、図21(d)に示すような矩形格子状、図21(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 planar arrangement of the sheet joint portion 40 and the through-holes 31 can be determined as appropriate, but a regularly repeated planar arrangement is preferable, and an oblique lattice shape as shown in FIG. Hexagonal lattice shape as shown (these are also called zigzag shapes), square lattice shape as shown in FIG. 21 (c), rectangular lattice shape as shown in FIG. 21 (d), as shown in FIG. 21 (e) Parallel body lattice (as shown in the figure, two groups are provided so that a large number of groups of parallel diagonal rows intersect each other), etc. (these are inclined at an angle of less than 90 degrees with respect to the expansion and contraction direction And a group of sheet joint portions 40 (group unit arrangement may be regular or irregular, and may be a pattern or a letter shape) is regularly repeated. You can also

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、弾性フィルム30に形成された貫通孔31を通じて接合される。この場合、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間以外では弾性フィルム30と接合されていないことが望ましい。   The first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B in the sheet bonding portion 40 are bonded through the through-hole 31 formed in the elastic film 30. In this case, it is desirable that the elastic film 30 is not bonded at least except between the first sheet layer 20A and the second sheet layer 20B in the sheet bonding portion 40.

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の接合手段は特に限定されない。例えば、接合部40における第1シート層20A及び第2シート層20Bの接合はホットメルト接着剤によりなされていても、ヒートシールや超音波シール等の素材溶着による接合手段によりなされていても良い。   The joining means of the first sheet layer 20A and the second sheet layer 20B in the sheet joining portion 40 is not particularly limited. For example, the joining of the first sheet layer 20A and the second sheet layer 20B in the joining portion 40 may be performed by a hot melt adhesive, or may be performed by a joining means such as heat sealing or ultrasonic sealing.

シート接合部40が素材溶着により形成される形態は、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の少なくとも一方の大部分又は一部の溶融固化物20mのみにより第1シート層20A及び第2シート層20Bが接合される第1溶着形態(図17(a)参照)、シート接合部40における弾性フィルム30の全部若しくは大部分又は一部の溶融固化物30mのみにより第1シート層20A及び第2シート層20Bが接合される第2溶着形態(図17(b)参照)、及びこれらの両者が組み合わさった第3溶着形態(図17(c)参照)のいずれでも良いが、第2、第3溶着形態が好ましい。特に好ましいのは、第1シート層20A及び第2シート層20Bの一部の溶融固化物20mと、シート接合部40における弾性フィルム30の全部若しくは大部分の溶融固化物30mとにより第1シート層20A及び第2シート層20Bが接合される形態である。なお、図19(b)に示される第3溶着形態では、黒色に写っている第1シート層20A又は第2シート層20Bの繊維溶融固化物20m間に、白色に写っている弾性フィルム30の溶融固化物30mが見られるのに対して、図19(a)に示される第1溶着形態では、第1シート層20A又は第2シート層20Bの繊維溶融固化物20m間に弾性フィルムの溶融固化物は見られない(白色部分は繊維溶融固化物20mの境界と、繊維溶融固化物20mの乱反射である)。   The form in which the sheet joint portion 40 is formed by material welding is the first sheet layer formed only by the majority or part of the molten solidified material 20m of at least one of the first sheet layer 20A and the second sheet layer 20B in the sheet joint portion 40. 20A and the 2nd sheet | seat layer 20B are joined to the 1st sheet | seat form (refer FIG. 17 (a)), the elastic sheet 30 in the sheet | seat junction part 40, all or most, or a part of 1st sheet | seat only by 30 m of melted solidified materials. Either the second welding mode in which the layer 20A and the second sheet layer 20B are joined (see FIG. 17B) or the third welding mode in which these two are combined (see FIG. 17C) may be used. The second and third welding modes are preferable. Particularly preferably, the first sheet layer is composed of a part of the melt-solidified material 20m of the first sheet layer 20A and the second sheet layer 20B and the whole or most of the melt-solidified material 30m of the elastic film 30 in the sheet joint portion 40. 20A and the second sheet layer 20B are joined together. In addition, in the 3rd welding form shown by FIG.19 (b), between the fiber fusion | melting solidified materials 20m of the 1st sheet layer 20A or the 2nd sheet layer 20B which are reflected in black, the elastic film 30 which is reflected in white In contrast to the melted and solidified material 30m, in the first welding form shown in FIG. 19A, the elastic film is melted and solidified between the fiber melted and solidified materials 20m of the first sheet layer 20A or the second sheet layer 20B. No object is seen (the white part is the boundary of the fiber melt-solidified product 20m and the irregular reflection of the fiber melt-solidified product 20m).

第1接着形態や第3接着形態のように、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大部分又は一部の溶融固化物20mを接着剤として第1シート層20A及び第2シート層20Bを接合する場合、第1シート層20A及び第2シート層20Bの一部は溶融しない方がシート接合部40が硬質化しないため好ましい。なお、第1シート層20A及び第2シート層20Bが不織布であるときには、第1シート層20A及び第2シート層20Bの一部が溶融しないことには、シート接合部40の全繊維について芯(複合繊維における芯だけでなく単成分繊維の中心部分を含む)は残るがその周囲部分(複合繊維における鞘だけでなく単成分繊維の表層側の部分を含む)は溶融する形態や、一部の繊維は全く溶融しないが、残りの繊維は全部が溶融する又は芯は残るがその周囲部分は溶融する形態を含む。   As in the first adhesive form and the third adhesive form, the first sheet layer 20A and the second sheet 20A and the second sheet 20A and the second sheet layer 20B are used by using at least one of the first sheet layer 20A and the second sheet layer 20B as the adhesive. When joining the sheet layer 20B, it is preferable not to melt part of the first sheet layer 20A and the second sheet layer 20B because the sheet joining part 40 does not harden. Note that when the first sheet layer 20A and the second sheet layer 20B are non-woven fabrics, a part of the first sheet layer 20A and the second sheet layer 20B does not melt. The composite fiber contains not only the core but also the central part of the single component fiber), but the surrounding part (including not only the sheath but also the surface part of the single component fiber of the composite fiber) melts, The fibers do not melt at all, but the remaining fibers either completely melt or the core remains but the surrounding portion includes a molten form.

第2溶着形態及び第3溶着形態のように、弾性フィルム30の溶融固化物30mを接着剤として第1シート層20A及び第2シート層20Bを接合すると、剥離強度が高いものとなる。第2溶着形態では、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フィルム30の融点及びシート接合部40形成時の加熱温度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間に弾性フィルム30を挟み、シート接合部40となる部位を加圧・加熱し、弾性フィルム30のみを溶融することにより製造することができる。一方、第3溶着形態では、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フィルム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間に弾性フィルム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フィルム30とを溶融することにより製造することができる。このような観点から、弾性フィルム30の融点は80〜145℃程度のものが好ましく、第1シート層20A及び第2シート層20Bの融点は85〜190℃程度、特に150〜190℃程度のものが好ましく、第1シート層20A及び第2シート層20Bの融点と弾性フィルム30の融点との差は60〜90℃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。   When the first sheet layer 20A and the second sheet layer 20B are joined using the melt-solidified material 30m of the elastic film 30 as an adhesive as in the second welding form and the third welding form, the peel strength becomes high. In the second welding mode, the first sheet layer 20A and the second sheet layer 20B have a melting point that is higher than the melting point of the elastic film 30 and the heating temperature when forming the sheet joint 40. In addition, the elastic film 30 is sandwiched between the second sheet layers 20 </ b> B, the portion to be the sheet bonding portion 40 is pressurized and heated, and only the elastic film 30 is melted. On the other hand, in the third welding mode, the first sheet layer 20A and the second sheet layer 20B are between the first sheet layer 20A and the second sheet layer 20B 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 film 30. It can be manufactured by sandwiching the elastic film 30, pressurizing and heating a portion to be the sheet bonding portion 40, and melting at least one of the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B and the elastic film 30. From such a viewpoint, the melting point of the elastic film 30 is preferably about 80 to 145 ° C., and the melting points of the first sheet layer 20A and the second sheet layer 20B are about 85 to 190 ° C., particularly about 150 to 190 ° C. The difference between the melting points of the first sheet layer 20A and the second sheet layer 20B and the melting point of the elastic film 30 is preferably about 60 to 90 ° C. Moreover, it is preferable that heating temperature shall be about 100-150 degreeC.

第2溶着形態及び第3溶着形態では、第1シート層20A及び第2シート層20Bが不織布であるときには、弾性フィルム30の溶融固化物30mは、図18(c)に示すようにシート接合部40における第1シート層20A及び第2シート層20Bの厚み方向全体にわたり繊維間に浸透していても良いが、図17(b)(c)及び図18(a)に示すように厚み方向中間まで繊維間に浸透する形態、又は図18(b)に示すように第1シート層20A及び第2シート層20Bの繊維間にほとんど浸透しない形態の方が、シート接合部40の柔軟性が高いものとなる。   In the second welding mode and the third welding mode, when the first sheet layer 20A and the second sheet layer 20B are non-woven fabrics, the melt-solidified product 30m of the elastic film 30 is a sheet joint portion as shown in FIG. 40 may penetrate between the fibers in the entire thickness direction of the first sheet layer 20A and the second sheet layer 20B, but as shown in FIGS. 17 (b) (c) and 18 (a), it is intermediate in the thickness direction. The form that penetrates between the fibers up to or the form that hardly penetrates between the fibers of the first sheet layer 20A and the second sheet layer 20B as shown in FIG. It will be a thing.

図20は、第2溶着形態及び第3溶着形態を形成するのに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、弾性フィルム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フィルム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、弾性フィルム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。この弾性フィルム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。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、弾性フィルム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、弾性フィルム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フィルム30とを溶融することによって、弾性フィルム30に貫通孔31を形成するのと同時に、その貫通孔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。   FIG. 20 shows an example of an ultrasonic sealing device suitable for forming the second welding form and the third welding form. 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 film 30 and the second sheet layer 20B are fed. At this time, for example, the feeding driving speed of the upstream elastic film 30 by the feeding driving roll 63 and the nip roll 62 is made slower than the feeding speed after the anvil roll 60 and the ultrasonic horn 61, thereby the feeding driving roll 63 and the nip roll 62. The elastic film 30 is stretched in the MD direction (machine direction, flow direction) to a predetermined stretch rate through the path from the nip position due to the above to the seal position due to the anvil roll 60 and the ultrasonic horn 61. The stretch rate of the elastic film 30 can be set by selecting the speed difference between the anvil roll 60 and the feed drive roll 63, and can be set to about 300% to 500%, for example. 62 is a nip roll. The first sheet layer 20 </ b> A, the elastic film 30, and the second sheet layer 20 </ b> B fed between the anvil roll 60 and the ultrasonic horn 61 are stacked in this order, and the protrusion 60 a and the ultrasonic horn 61 are While being pressurized, the ultrasonic horn 61 is heated by ultrasonic vibration energy to melt only the elastic film 30 or at least one of the first sheet layer 20A and the second sheet layer 20B and the elastic film 30 are melted. By doing so, the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B are joined through the through-hole 31 at the same time as the through-hole 31 is formed in the elastic film 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.

貫通孔31が形成される理由は必ずしも明確ではないが、弾性フィルム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、弾性フィルム30における、伸縮方向に並ぶ隣接貫通孔31の間の部分は、図7(a)、図9(a)及び図11(a)に示すように、貫通孔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、伸縮方向と直交する方向の中央側ほど伸縮方向中央側に釣り合うまで収縮し、貫通孔31が伸縮方向に拡大する。そして、後述する伸縮領域80のように弾性フィルム30が伸縮方向に沿って直線的に連続する部分が残るパターンでシート接合部40を形成すると、図7(a)及び図9(a)に示すように、個別の製品に切断すること等により自然長状態まで収縮するときに、貫通孔31の拡大部分の伸縮方向の長さは、貫通孔31とシート接合部40との間に隙間ができなくなるまで収縮することとなる。一方、後述する非伸縮領域70のように弾性フィルム30が伸縮方向に沿って直線的に連続する部分がないパターンでシート接合部40を形成すると、図11(a)に示すように、個別の製品に切断すること等により自然長状態まで収縮するときにほとんど収縮しないため、貫通孔31とシート接合部40との間に隙間が大きく残されることとなる。   The reason why the through 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 film 30 is melted and separated from the surroundings. At this time, the portion of the elastic film 30 between the adjacent through holes 31 aligned in the expansion / contraction direction is expanded / contracted by the through holes 31 as shown in FIGS. 7A, 9A, and 11A. Since it is cut from both sides and loses the support on both sides in the contraction direction, the central side in the direction orthogonal to the expansion / contraction direction is balanced with the central side in the expansion / contraction direction within a range that can maintain continuity in the direction orthogonal to the contraction direction. The through hole 31 expands in the expansion / contraction direction. And when the sheet | seat junction part 40 is formed in the pattern in which the part which the elastic film 30 continues linearly along the expansion-contraction direction like the expansion-contraction area | region 80 mentioned later is shown to Fig.7 (a) and FIG.9 (a). Thus, when contracting to a natural length state by cutting into individual products, the length in the expansion / contraction direction of the enlarged portion of the through hole 31 creates a gap between the through hole 31 and the sheet joining portion 40. It will shrink until it runs out. On the other hand, when the sheet bonding portion 40 is formed in a pattern in which the elastic film 30 does not have a linearly continuous portion along the stretching direction as in a non-stretchable region 70 described later, as shown in FIG. Since it hardly shrinks when it is shrunk to a natural length state by cutting into a product or the like, a large gap is left between the through hole 31 and the sheet bonding portion 40.

第1シート層20A及び第2シート層20Bの構成材は、シート状のものであれば特に限定無く使用できるが、通気性及び柔軟性の観点から不織布を用いることが好ましい。不織布は、その原料繊維が何であるかは特に限定されない。例えば、ポリエチレンやポリプロピレン等のオレフィン系、ポリエステル系、ポリアミド系等の合成繊維、レーヨンやキュプラ等の再生繊維、綿等の天然繊維などや、これらから二種以上が使用された混合繊維、複合繊維などを例示することができる。さらに、不織布は、どのような加工によって製造されたものであってもよい。加工方法としては、公知の方法、例えば、スパンレース法、スパンボンド法、サーマルボンド法、メルトブローン法、ニードルパンチ法、エアスルー法、ポイントボンド法等を例示することができる。不織布を用いる場合、その目付けは12〜20g/m2程度とするのが好ましい。また、第1シート層20A及び第2シート層20B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、ウエスト端部領域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、その間に弾性フィルム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、その間に弾性フィルム30を介在させることができる。もちろん、前後方向の全体にわたり第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の構成材間に弾性フィルム30を介在させることもできる。 The constituent material of the first sheet layer 20A and the second sheet layer 20B can be used without particular limitation as long as it is a sheet, but it is preferable to use a nonwoven fabric from the viewpoint of air permeability and flexibility. The nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. When using a nonwoven fabric, the basis weight is preferably about 12 to 20 g / m 2 . 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 end region 23, the constituent material located 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 addition, the elastic film 30 is interposed therebetween, 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 film 30 is interposed therebetween. Can be interposed. 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, and the constituent material of the first sheet layer 20A and the second sheet layer are not folded back. The elastic film 30 can also be interposed between the constituent materials of 20B.

弾性フィルム30は特に限定されるものではなく、それ自体弾性を有する熱可塑性樹脂フィルムであれば、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(伸縮方向、MD方向)における引張強度が8〜25N/35mm、前後方向(伸縮方向と直交する方向、CD方向)における引張強度が5〜20N/35mm、幅方向における引張伸度が450〜1050%、及び前後方向における引張伸度が450〜1400%の弾性フィルム30であると好ましい。弾性フィルム30の厚みは特に限定されないが、20〜40μm程度であるのが好ましい。   The elastic film 30 is not particularly limited, and as long as it is a thermoplastic resin film having elasticity per se, a film having a large number of holes and slits for ventilation can also be used. . In particular, the tensile strength in the width direction (stretching direction, MD direction) is 8 to 25 N / 35 mm, the tensile strength in the front-rear direction (direction perpendicular to the stretching direction, CD direction) is 5 to 20 N / 35 mm, and the tensile elongation in the width direction. Is preferably 450 to 1050%, and the elastic film 30 having a tensile elongation in the front-rear direction of 450 to 1400%. Although the thickness of the elastic film 30 is not specifically limited, It is preferable that it is about 20-40 micrometers.

(伸縮領域及び非伸縮領域)
外装体20における弾性フィルム伸縮構造20Xを有する領域は、非伸縮領域70と、この非伸縮領域70の少なくとも幅方向一方側に設けられた、幅方向に伸縮可能な伸縮領域80とを有している。これら伸縮領域80及び非伸縮領域70の配置は適宜定めることができる。本実施形態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。もちろん、吸収体13と重なる領域からその幅方向又は前後方向に位置する吸収体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を設けることもる。
(Stretchable area and non-stretchable area)
The region having the elastic film stretchable structure 20 </ b> X in the exterior body 20 includes a non-stretchable region 70 and a stretchable region 80 that is provided on at least one side in the width direction of the non-stretchable region 70 and can be stretched in the width direction. Yes. 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 the present embodiment, the portion overlapping the absorber 13 is an area that does not need to be expanded and contracted, and therefore, part or all of the portion overlapping the absorber 13 as illustrated. It is preferable to make the non-stretchable region 70 (desirably including almost the entire inner and outer fixed region 10B). 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 or the front-rear direction, and the non-stretchable region 70 is provided only in the region not overlapping with the absorber 13. May be provided.

(伸縮領域)
伸縮領域80では、弾性フィルム30が幅方向に沿って直線的に連続する部分32を有しており、かつ弾性フィルム30の収縮力により幅方向に収縮しているとともに、幅方向に伸長可能となっている。より具体的には、弾性フィルム30を幅方向に伸長した状態で、幅方向及びこれと直交する前後方向(伸縮方向と直交する方向)にそれぞれ間隔を空けて、弾性フィルム30の貫通孔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、伸縮領域80及び非伸縮領域70の両者を含む弾性フィルム伸縮構造20X全体を形成するとともに、伸縮領域80では弾性フィルム30が幅方向に沿って直線的に連続する部分を有するように貫通孔31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 stretchable region 80, the elastic film 30 has a portion 32 linearly continuous along the width direction, and is contracted in the width direction by the contraction force of the elastic film 30, and can be expanded in the width direction. It has become. More specifically, in a state where the elastic film 30 is extended in the width direction, the through-holes 31 of the elastic film 30 are formed at intervals in the width direction and in the front-rear direction (direction orthogonal to the expansion / contraction direction) orthogonal thereto. The first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B are joined together to form a large number of sheet joining portions 40, thereby forming the entire elastic film stretchable structure 20 </ b> X including both the stretchable region 80 and the non-stretchable region 70. At the same time, in the stretchable region 80, such a stretchability can be imparted by arranging the through holes 31 so that the elastic film 30 has a linearly continuous portion along the width direction.

伸縮領域80では、自然長状態では、図7(d)及び図9(d)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、前後方向に延びる収縮皺25が形成され、図7(c)及び図9(c)に示すように、幅方向にある程度伸長した装着状態でも、収縮皺25は伸ばされるものの、残るようになっている。また、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間以外では弾性フィルム30と接合されていないと、装着状態を想定した図7(c)及び図9(d)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)及び図9(a)(b)からも分かるように、これらの状態では、弾性フィルム30における貫通孔31と、シート接合部40との間に隙間が形成され、弾性フィルム30の素材が無孔のフィルムやシートであっても、この隙間により通気性が付加される。また、図7(d)及び図9(d)に示す自然長状態では、弾性フィルム30の収縮により貫通孔31がすぼまり、貫通孔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。なお、装着状態及び自然長状態の収縮皺25の状態は、図8及び図10のサンプル写真にも現れている。   In the stretchable region 80, in the natural length state, as shown in FIGS. 7D and 9D, the first sheet layer 20A and the second sheet layer 20B between the sheet joining portions 40 swell in a direction away from each other. Thus, as shown in FIGS. 7 (c) and 9 (c), a shrinking fold 25 extending in the width direction is formed, but the shrinking fold 25 is stretched but remains, as shown in FIGS. 7 (c) and 9 (c). It has become. Further, as illustrated, the first sheet layer 20A and the second sheet layer 20B are not joined to the elastic film 30 except at least between the first sheet layer 20A and the second sheet layer 20B in the sheet joining portion 40. FIGS. 7 (c) and 9 (d) assuming the mounted state, and FIGS. 7 (a) (b) and 9 (a) (9) assuming the expanded 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 through hole 31 in the elastic film 30 and the sheet joint portion 40, and the material of the elastic film 30 is a non-porous film or sheet. However, air permeability is added by this gap. Further, in the natural length state shown in FIG. 7D and FIG. 9D, the through hole 31 is squeezed due to the contraction of the elastic film 30, and almost no gap is formed between the through hole 31 and the sheet joining portion 40. Not. In addition, the state of the shrinkage wrinkle 25 in the mounted state and the natural length state also appears in the sample photographs of FIGS.

伸縮領域80の幅方向の弾性限界伸びは200%以上(好ましくは265〜295%)とすることが望ましい。伸縮領域80の弾性限界伸びは、製造時の弾性フィルム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40xの割合であり、この割合が大きくなるほど弾性限界伸びが低下する。通常の場合、シート接合部40の長さ40x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の弾性限界伸びはシート接合部40の面積率により調整できる。   The elastic limit elongation in the width direction of the stretchable region 80 is desirably 200% or more (preferably 265 to 295%). The elastic limit elongation of the stretchable region 80 is substantially determined by the stretch rate of the elastic film 30 at the time of manufacture, but based on this, it is lowered by a factor that inhibits shrinkage in the width direction. The main factor of such inhibition is the ratio of the length 40x of the sheet joint portion 40 per unit length in the width direction, and the elastic limit elongation decreases as the ratio increases. In a normal case, the length 40x of the sheet bonding portion 40 has a correlation with the area ratio of the sheet bonding portion 40, so that the elastic limit 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、主に弾性フィルム30が幅方向に沿って直線的に連続する部分32の幅32wの総和により調整することができる。弾性フィルム30が幅方向に沿って直線的に連続する部分32の幅32wは、当該連続する部分32の両側縁に接する貫通孔31の、前後方向の間隔31dに等しく、当該貫通孔31の間隔31dは、前後方向における貫通孔31の長さ31yと、前後方向におけるシート接合部40の長さ40yとが等しいとき(前述の貫通孔31及びシート接合部40の同時形成手法を採用する場合等)には、当該連続する部分の両側縁に接するシート接合部40の、前後方向の間隔40dに等しい。よって、この場合には、前後方向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40yの割合により、伸縮領域80の伸長応力を調整することができ、通常の場合、シート接合部40の長さ40y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の伸長応力はシート接合部40の長さはシート接合部40の面積率により調整できる。伸縮領域80の伸長応力は、弾性限界の50%まで伸長したときの伸長応力を目安とすることができる。   The elongation stress of the stretchable region 80 can be adjusted mainly by the sum of the widths 32w of the portions 32 where the elastic film 30 continues linearly along the width direction. The width 32w of the portion 32 in which the elastic film 30 is linearly continuous along the width direction is equal to the interval 31d in the front-rear direction of the through-holes 31 in contact with both side edges of the continuous portion 32. 31d is when the length 31y of the through-hole 31 in the front-rear direction is equal to the length 40y of the sheet-joint portion 40 in the front-rear direction (when the above-described simultaneous formation method of the through-hole 31 and the sheet joint 40 is employed, etc.) ) Is equal to the interval 40d in the front-rear direction of the sheet joining portion 40 in contact with both side edges of the continuous portion. Therefore, in this case, the extension stress of the stretchable region 80 can be adjusted by the ratio of the length 40y of the sheet joint portion 40 per unit length in the front-rear direction. Since the length 40y has a correlation with the area ratio of the sheet bonding portion 40, the elongation stress of the stretchable region 80 can be adjusted by adjusting the length of the sheet bonding portion 40 by the area ratio of the sheet bonding portion 40. The elongation stress of the expansion / contraction region 80 can be determined based on the elongation stress when it is expanded to 50% of the elastic limit.

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の弾性限界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15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15に示す形態では、前身頃Fにおける脚の付け根に沿って斜め方向に延びる領域81、及び脚開口の縁部領域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、従って伸長応力が弱く、柔軟に伸縮する領域となっている。また、後身頃Bにおける腸骨対向領域83、及び脚開口の縁部領域82も、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 elastic limit elongation and the extension stress of the stretchable region 80 can be adjusted by the area of the sheet joint portion 40, a plurality of regions having different area ratios of the sheet joint portion 40 in the stretchable region 80 as shown in FIG. The fitting property can be changed according to the part. In the form shown in FIG. 15, the area 81 extending in the oblique direction along the base of the leg in the front body F and the edge area 82 of the leg opening have a higher area ratio of the sheet joint portion 40 than the other areas. Therefore, the extensional stress is weak and the region expands and contracts flexibly. In addition, the iliac facing region 83 and the edge region 82 of the leg opening in the back body B also have a higher area ratio of the sheet joint portion 40 than the other regions, and therefore the extension stress is weak and the region expands and contracts flexibly. It has become.

(非伸縮領域)
一方、非伸縮領域70は、弾性フィルム30は幅方向に連続するものの、貫通孔31の存在により幅方向に沿って直線的に連続する部分を有しない領域とされている。したがって、弾性フィルム30を幅方向に伸長した状態で、幅方向及びこれと直交する前後方向にそれぞれ間隔を空けて、弾性フィルム30の貫通孔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、伸縮領域80及び非伸縮領域70の両者を含む弾性フィルム伸縮構造20X全体を形成するとしても、図11に示すように、非伸縮領域70では、弾性フィルム30が幅方向に沿って直線的に連続しないため、弾性フィルム30の収縮力が第1シート層20A及び第2シート層20Bにほとんど作用せず、伸縮性がほぼ消失し、弾性限界伸びは100%に近くなるのである。そしてこのような非伸縮領域70では、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で接合されており、シート接合部40が連続的とならないため、柔軟性の低下は防止される。換言すれば、弾性フィルム30が幅方向に沿って直線的に連続しない部分の有無により伸縮領域80及び非伸縮領域70を形成することができる。また、非伸縮領域70でも弾性フィルム30の連続性が残っており、図12に示されるサンプル写真からも分かるように、弾性フィルム30の独立切断片が残ることもなく、また皺も形成されないため、極めて見栄えが良く、かつ貫通孔31による厚み方向の通気性が確保される。非伸縮領域70は、幅方向の弾性限界伸びが120%以下(好ましくは110%以下、より好ましくは100%)であると好ましい。
(Non-stretchable area)
On the other hand, the non-stretchable region 70 is a region that does not have a linearly continuous portion along the width direction due to the presence of the through hole 31, although the elastic film 30 is continuous in the width direction. Therefore, in a state where the elastic film 30 is extended in the width direction, the first sheet layer 20 </ b> A and the second sheet layer are spaced via the through-holes 31 of the elastic film 30 with an interval in the width direction and the front-rear direction orthogonal thereto. Even if the elastic film stretchable structure 20X including both the stretchable region 80 and the non-stretchable region 70 is formed by joining 20B and forming a large number of sheet joint portions 40, as shown in FIG. In the region 70, since the elastic film 30 does not continue linearly along the width direction, the contraction force of the elastic film 30 hardly acts on the first sheet layer 20A and the second sheet layer 20B, and the stretchability is almost lost. The elastic limit elongation is close to 100%. In such a non-stretchable region 70, the first sheet layer 20 </ b> A and the second sheet layer 20 </ b> B are joined by a large number of sheet joining portions 40 arranged at intervals, and the sheet joining portion 40 is not continuous. Therefore, a decrease in flexibility is prevented. In other words, the stretchable region 80 and the non-stretchable region 70 can be formed by the presence or absence of a portion where the elastic film 30 does not continue linearly along the width direction. Further, the continuity of the elastic film 30 remains even in the non-stretchable region 70, and as can be seen from the sample photograph shown in FIG. 12, the independent cut piece of the elastic film 30 does not remain and no wrinkles are formed. The appearance is very good and the air permeability in the thickness direction by the through hole 31 is ensured. The non-stretchable region 70 preferably has an elastic limit elongation in the width direction of 120% or less (preferably 110% or less, more preferably 100%).

非伸縮領域70における弾性フィルム30における貫通孔31の配列パターンは適宜定めることができるが、図11〜図14に示すように千鳥状配置とし、貫通孔31の前後方向の中心間隔31eが貫通孔31の前後方向の長さ31yより短いパターンとすると、弾性フィルム30の連続性を維持しつつ幅方向の直線連続性をほぼ完全に無くすことができ、見栄えも図15に示すように好ましいものとなる。この場合、貫通孔31の幅方向の中心間隔31fが貫通孔31の幅方向の長さ31xより短いとがより好ましい。   The arrangement pattern of the through holes 31 in the elastic film 30 in the non-stretchable region 70 can be determined as appropriate. However, as shown in FIGS. 11 to 14, the arrangement pattern is staggered, and the center interval 31 e in the front-rear direction of the through holes 31 is the through hole. When the pattern is shorter than the length 31y in the front-rear direction of 31, the continuity of the elastic film 30 can be maintained and the linear continuity in the width direction can be almost completely eliminated, and the appearance is preferable as shown in FIG. Become. In this case, it is more preferable that the center interval 31f in the width direction of the through hole 31 is shorter than the length 31x of the through hole 31 in the width direction.

通常の場合、中でも弾性フィルム30を幅方向に4倍に伸長したときの伸長応力が4〜12N/35mmのものである場合、非伸縮領域70を幅方向に弾性限界まで伸ばした状態で、貫通孔31の前後方向の中心間隔31eが0.4〜2.7mm、かつ貫通孔31の前後方向の長さ31yが0.5〜3.0mm、特に0.7〜1.1mmであると好ましい。また、貫通孔31の幅方向の中心間隔31fが、貫通孔31の前後方向の長さ31yの0.5〜2倍、特に1〜1.2倍であると好ましく、貫通孔31の幅方向の長さ31xが、貫通孔31の幅方向の中心間隔31fの1.1〜1.8倍、特に1.1〜1.4倍であると好ましい。なお、非伸縮領域70を幅方向に弾性限界まで伸ばした状態(換言すれば第1シート層20A及び第2シート層20Bが完全に展開した状態)では、貫通孔31の幅方向の中心間隔31fはシート接合部40の幅方向の中心間隔40fに等しく、貫通孔31の前後方向の中心間隔31eはシート接合部40の前後方向の中心間隔40eに等しく、貫通孔31の前後方向の長さ31yはシート接合部40の前後方向の長さ40yに等しい。   Normally, when the elastic film 30 is stretched 4 times in the width direction and the extension stress is 4 to 12 N / 35 mm, the non-stretchable region 70 is stretched to the elastic limit in the width direction. The center distance 31e in the front-rear direction of the holes 31 is 0.4 to 2.7 mm, and the length 31y in the front-rear direction of the through holes 31 is 0.5 to 3.0 mm, particularly 0.7 to 1.1 mm. . Further, the center interval 31f in the width direction of the through hole 31 is preferably 0.5 to 2 times, particularly 1 to 1.2 times the length 31y of the through hole 31 in the front-rear direction. Is preferably 1.1 to 1.8 times, particularly 1.1 to 1.4 times the center interval 31f in the width direction of the through hole 31. In the state in which the non-stretchable region 70 is extended to the elastic limit in the width direction (in other words, the first sheet layer 20A and the second sheet layer 20B are completely expanded), the center interval 31f in the width direction of the through hole 31 Is equal to the center interval 40f in the width direction of the sheet bonding portion 40, the center interval 31e in the front-rear direction of the through-hole 31 is equal to the center interval 40e in the front-rear direction of the sheet bonding portion 40, and the length 31y in the front-rear direction of the through-hole 31 Is equal to the length 40y in the front-rear direction of the sheet joint 40.

非伸縮領域70では、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の間以外では、第1シート層20A及び第2シート層20Bと弾性フィルム30とが接合されておらず、かつ自然長の状態でシート接合部40の幅方向両側に弾性フィルム30の貫通孔31の周縁及びシート接合部40が離間されて形成された隙間を有していると、弾性フィルム30の素材が無孔のフィルムやシートであっても、この隙間により常に通気性が付加されるため好ましい。前述の貫通孔31及びシート接合部40の同時形成手法を採用する場合には、シート接合部40の形状等に関係なく、自然にこの状態になる。   In the non-stretchable region 70, the first sheet layer 20A and the second sheet layer 20B and the elastic film 30 are not joined except for the portion between the first sheet layer 20A and the second sheet layer 20B in the sheet joining portion 40, And when it has a gap formed by separating the peripheral edge of the through hole 31 of the elastic film 30 and the sheet bonding portion 40 on both sides in the width direction of the sheet bonding portion 40 in a natural length state, the material of the elastic film 30 is Even a non-porous film or sheet is preferable because air permeability is always added by this gap. In the case where the above-described simultaneous formation method of the through hole 31 and the sheet joint portion 40 is adopted, this state naturally occurs regardless of the shape or the like of the sheet joint portion 40.

個々のシート接合部40及び貫通孔31の自然長状態での形状は、特に限定されないが、柔軟性の観点からは面積が小さいことが望ましく、弾性フィルム30の幅方向の直線連続性をなくすためには、前後方向に長い形状であることが望ましいため、前後方向に長い楕円形、長方形(図11参照)、ひし形(図13(b)参照)、凸レンズ形(図13(a)参照)、凹レンズ形(図14(a)参照)とすることが好ましい。ただし、ひし形のように角が鋭角であると、弾性フィルム30が破断しやすい。これに対して、凸レンズ形はシート接合部40の溶着が安定するため好ましく、凹レンズ形は面積をより小さくできる点で好ましい。   Although the shape in the natural length state of each sheet | seat junction part 40 and the through-hole 31 is not specifically limited, In order to eliminate the linear continuity of the width direction of the elastic film 30, it is desirable that an area is small from a softness | flexibility viewpoint. Since it is desirable to have a shape that is long in the front-rear direction, an ellipse that is long in the front-rear direction, a rectangle (see FIG. 11), a rhombus (see FIG. 13B), a convex lens shape (see FIG. 13A), A concave lens shape (see FIG. 14A) is preferable. However, if the corner is an acute angle like a diamond, the elastic film 30 is easily broken. On the other hand, the convex lens shape is preferable because the welding of the sheet joining portion 40 is stable, and the concave lens shape is preferable in that the area can be further reduced.

非伸縮領域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%)
The area ratio of the sheet bonding portion 40 and the area of each sheet bonding portion 40 in the non-stretchable region can be determined as appropriate. It is preferable that the non-stretchable region 70 does not become hard because the area ratio of the joint 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%)

このように、非伸縮領域70の弾性限界伸びは、貫通孔31の配列パターンや、個々の貫通孔31の寸法及び中心間隔により変化させることができる。よって、図示しないが、これらを伸縮領域80内の複数個所、又は複数の非伸縮領域70間で異ならしめることもできる。例えば、前身頃Fの非伸縮領域70における弾性限界伸びを後身頃Bの非伸縮領域70における弾性限界伸びよりも大きくするのは一つの好ましい形態である。   As described above, the elastic limit elongation of the non-stretchable region 70 can be changed by the arrangement pattern of the through holes 31, the dimensions of the individual through holes 31, and the center interval. Therefore, although not shown, these can be made different at a plurality of locations in the stretchable region 80 or between the plurality of non-stretchable regions 70. For example, it is one preferable mode to make the elastic limit elongation in the non-stretchable region 70 of the front body F larger than the elastic limit elongation in the non-stretchable region 70 of the rear body B.

(前後押さえシート)
図1及び図4にも示されるように、外装体20の内面上に取り付けられた内装体10の前後端部をカバーし、且つ内装体10の前後縁からの漏れを防ぐために、前後押さえシート50,60が設けられていても良い。図示形態について更に詳細に説明すると、前押さえシート50は、前身頃Fの外装体20の内面のうちウエスト端部領域23の折り返し部分20Cの内面から内装体10の前端部と重なる位置まで幅方向全体にわたり延在しており、後押さえシート60は、後身頃Bの外装体20の内面のうちウエスト端部領域23の折り返し部分20Cの内面から内装体10の後端部と重なる位置まで幅方向全体にわたり延在している。前後押さえシート50,60の股間側の縁部に幅方向の全体にわたり(中央部のみでも良い)若干の非接着部分を設けると、接着剤がはみ出ないだけでなく、この部分をトップシートから若干浮かせて防漏壁として機能させることができる。
(Front / rear holding sheet)
As shown in FIGS. 1 and 4, in order to cover the front and rear end portions of the interior body 10 attached on the inner surface of the exterior body 20 and to prevent leakage from the front and rear edges of the interior body 10, 50 and 60 may be provided. Explaining in more detail about the illustrated form, the front presser sheet 50 extends in the width direction from the inner surface of the folded portion 20C of the waist end region 23 of the inner surface of the outer body 20 of the front body F to a position overlapping the front end portion of the inner body 10. The rear presser sheet 60 extends in the width direction from the inner surface of the folded portion 20C of the waist end region 23 to the position overlapping the rear end portion of the inner body 10 in the inner surface of the outer body 20 of the back body B. It extends throughout. If a slight non-adhesive portion is provided over the entire width direction (or only the central portion) at the crotch side edges of the front and rear pressing sheets 50, 60, not only does the adhesive not protrude, but this portion is slightly removed from the top sheet. Can float and function as a leak-proof wall.

図示形態のように、前後押さえシート50,60を別体として取り付けると、素材選択の自由度が高くなる利点があるものの、資材や製造工程が増加する等のデメリットもある。そのため、外装体20をおむつ内面に折り返してなる折り返し部分20Cを、内装体10と重なる部分まで延在させて、前述の押さえシート50,60と同等の部分を形成することもできる。   If the front and rear pressing sheets 50 and 60 are attached separately as in the illustrated form, there is an advantage that the degree of freedom of material selection is increased, but there are also disadvantages such as an increase in materials and manufacturing processes. Therefore, the folded portion 20C formed by folding the exterior body 20 on the inner surface of the diaper can be extended to a portion overlapping the interior body 10 to form a portion equivalent to the above-described pressing sheets 50 and 60.

<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。
・「弾性限界伸び」とは、伸縮方向における弾性限界(換言すれば第1シート層及び第2シート層が完全に展開した状態)の伸びを意味し、弾性限界時の長さを自然長を100%としたときの百分率で表すものである。
・「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、主伸縮部分、緩衝伸縮部分)における対象部分(例えばシート接合部40、貫通孔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、伸縮方向に弾性限界まで伸ばした状態の面積率を意味するものである。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20±5℃、相対湿度65%以下)の試験室又は装置内に放置し、恒量になった状態にする。予備乾燥は、試料又は試験片を相対湿度10〜25%、温度50℃を超えない環境で恒量にすることをいう。なお、公定水分率が0.0%の繊維については、予備乾燥を行わなくてもよい。恒量になった状態の試験片から米坪板(200mm×250mm、±2mm)を使用し、200mm×250mm(±2mm)の寸法の試料を切り取る。試料の重量を測定し、20倍して1平米あたりの重さを算出し、目付けとする。
・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:10gf/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AOUTGRAPHAGS−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AOUTGRAPHAGS−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20±5℃、相対湿度65%以下)の試験室又は装置内で行うものとする。
<Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.
-"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.
-“Elastic limit elongation” means the elongation of the elastic limit in the expansion / contraction direction (in other words, the state in which the first sheet layer and the second sheet layer are completely expanded), and the length at the elastic limit is the natural length. It is expressed as a percentage when 100% is assumed.
The “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 stretchable region 80, the non-stretchable region 70, the main stretchable portion, the buffer stretchable portion) in the target region. The total area of the through holes 31 and the vent holes) is divided by the area of the target region and expressed as a percentage. In particular, the “area ratio” in the region having the stretchable structure extends to the elastic limit in the stretchable direction. It means the area ratio of the 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 20 ± 5 ° C., relative humidity 65% or less) to obtain a constant weight. Pre-drying refers to making a sample or test piece constant in an environment where the relative humidity is 10 to 25% and the temperature does not exceed 50 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%. A sample with a size of 200 mm × 250 mm (± 2 mm) is cut out from the test piece in a constant weight using a rice-basis plate (200 mm × 250 mm, ± 2 mm). Measure the weight of the sample, multiply it by 20, calculate the weight per square meter, and use it as the basis weight.
・ "Thickness" 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.
- other than the above "thickness" is used automatic thickness measuring instrument (KES-G5 Handy Compression measurement program), load: 10 gf / cm 2, and the pressure area: automatically measured under the conditions of 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 a tensile tester, for example, AOUTGRAPHAGS-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 a tensile tester, for example, AOUTGRAPHAGS-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 condition (test location is temperature 20 ± 5 ℃, relative humidity 65% or less). .

本発明の弾性フィルム伸縮構造は、パンツタイプ使い捨ておむつだけでなく、テープタイプ使い捨ておむつの胴周りやファスニングテープにも適用でき、また、パッドタイプ等の他のタイプの使い捨ておむつや生理用ナプキン等を含め、吸収性物品全般において汎用されている立体ギャザー、平面ギャザー等の、他の伸縮部にも適用することができる。   The elastic film stretchable structure of the present invention can be applied not only to pants-type disposable diapers, but also to the waist and fastening tape of tape-type disposable diapers, and other types of disposable diapers such as pad types, sanitary napkins, etc. In addition, the present invention can also be applied to other stretchable parts such as three-dimensional gathers and flat gathers that are widely used in absorbent articles.

B…後身頃、F…前身頃、T…胴周り部、L…中間部、10…内装体、11…液透過性トップシート、12…液不透過性シート、13…吸収体、13N…括れ部分、14…包装シート、15…ギャザー不織布、16…ギャザー弾性部材、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…弾性フィルム伸縮構造、21…サイドシール部、23…ウエスト端部領域、24…ウエスト部弾性部材、25…収縮皺、29…脚周りライン、30…弾性フィルム、31…貫通孔、40…シート接合部、70…非伸縮領域、80…伸縮領域。   B ... Rear body, F ... Front body, T ... Trunk circumference part, L ... Middle part, 10 ... Interior body, 11 ... Liquid-permeable top sheet, 12 ... Liquid-impermeable sheet, 13 ... Absorber, 13N ... Part: 14 ... Packaging sheet, 15 ... Gathered nonwoven fabric, 16 ... Gather elastic member, 20 ... Exterior body, 20A ... First sheet layer, 20B ... Second sheet layer, 20C ... Folded part, 20X ... Elastic film stretchable structure, 21 DESCRIPTION OF SYMBOLS ... Side seal part, 23 ... Waist edge part area | region, 24 ... Waist part elastic member, 25 ... Shrinkage collar, 29 ... Leg circumference line, 30 ... Elastic film, 31 ... Through-hole, 40 ... Sheet | seat junction part, 70 ... Non-stretching Area, 80 .. Expansion / contraction area.

Claims (7)

排泄物を吸収する吸収体を備えた吸収性物品において、
第1シート層及び第2シート層の間に弾性フィルムが積層されるとともに、前記第1シート層及び第2シート層が、間隔を空けて配列された多数のシート接合部で前記弾性フィルムを貫通する貫通孔を通じて接合された弾性フィルム伸縮構造を備えており、
この弾性フィルム伸縮構造を有する領域は、一方向に伸縮可能な伸縮領域と、この伸縮領域の少なくとも伸縮方向一方側に設けられた非伸縮領域とを有しており、
前記伸縮領域は、前記弾性フィルムが前記伸縮方向に沿って直線的に連続する部分を有しており、かつ前記弾性フィルムの収縮力により前記伸縮方向に収縮しているとともに、前記伸縮方向に伸長可能であり、
前記非伸縮領域は、前記弾性フィルムが前記伸縮方向に連続するものの、前記貫通孔の存在により前記伸縮方向に沿って直線的に連続する部分を有しない、前記伸縮方向の弾性限界伸びが100%の領域である、
ことを特徴とする吸収性物品。
In an absorbent article provided with an absorber that absorbs excreta,
An elastic film is laminated between the first sheet layer and the second sheet layer, and the first sheet layer and the second sheet layer penetrate the elastic film at a number of sheet joint portions arranged at intervals. It has an elastic film stretchable structure joined through through-holes,
The region having the elastic film stretchable structure has a stretchable region that can stretch in one direction and a non-stretchable region provided on at least one stretchable direction side of the stretchable region,
The stretchable region has a portion in which the elastic film is linearly continuous along the stretchable direction, and contracts in the stretchable direction due to the shrinkage force of the elastic film and extends in the stretchable direction. Is possible,
The non-stretchable region has an elastic limit elongation of 100% in the stretch direction, although the elastic film continues in the stretch direction, but does not have a linearly continuous portion along the stretch direction due to the presence of the through hole. Which is the area of
An absorbent article characterized by the above.
排泄物を吸収する吸収体を備えた吸収性物品において、
第1シート層及び第2シート層の間に弾性フィルムが積層されるとともに、前記第1シート層及び第2シート層が、間隔を空けて配列された多数のシート接合部で前記弾性フィルムを貫通する貫通孔を通じて接合された弾性フィルム伸縮構造を備えており、
この弾性フィルム伸縮構造を有する領域は、一方向に伸縮可能な伸縮領域と、この伸縮領域の少なくとも伸縮方向一方側に設けられた非伸縮領域とを有しており、
前記伸縮領域は、前記弾性フィルムが前記伸縮方向に沿って直線的に連続する部分を有しており、かつ前記弾性フィルムの収縮力により前記伸縮方向に収縮しているとともに、前記伸縮方向に伸長可能であり、
前記非伸縮領域は、前記弾性フィルムが前記伸縮方向に連続するものの、前記貫通孔の存在により前記伸縮方向に沿って直線的に連続する部分を有しない領域であり、
前記非伸縮領域の全体にわたり、前記弾性フィルムを貫通する貫通孔が千鳥状に配置されており、前記貫通孔の前記伸縮方向の中心間隔が前記貫通孔の前記伸縮方向の長さより短く、前記貫通孔の前記伸縮方向と直交する方向の中心間隔が前記貫通孔の前記伸縮方向と直交する方向の長さより短い、
ことを特徴とする吸収性物品。
In an absorbent article provided with an absorber that absorbs excreta,
An elastic film is laminated between the first sheet layer and the second sheet layer, and the first sheet layer and the second sheet layer penetrate the elastic film at a number of sheet joint portions arranged at intervals. It has an elastic film stretchable structure joined through through-holes,
The region having the elastic film stretchable structure has a stretchable region that can stretch in one direction and a non-stretchable region provided on at least one stretchable direction side of the stretchable region,
The stretchable region has a portion in which the elastic film is linearly continuous along the stretchable direction, and contracts in the stretchable direction due to the shrinkage force of the elastic film and extends in the stretchable direction. Is possible,
The non-stretchable region is a region that does not have a linearly continuous portion along the stretchable direction due to the presence of the through-holes, although the elastic film is continuous in the stretchable direction.
Through holes that penetrate the elastic film are arranged in a staggered manner throughout the non-stretchable region, and the center interval in the stretch direction of the through holes is shorter than the length of the through holes in the stretch direction, and the through holes The center interval in the direction orthogonal to the expansion / contraction direction of the hole is shorter than the length of the through hole in the direction orthogonal to the expansion / contraction direction,
An absorbent article characterized by the above .
前記弾性フィルムを前記伸縮方向に4倍に伸長したときの伸長応力が4〜12N/35mmのものであり、
前記非伸縮領域を前記伸縮方向に弾性限界まで伸ばした状態で、前記貫通孔の前記伸縮方向の中心間隔が0.7〜3.0mm、前記貫通孔の前記伸縮方向の長さが1.0〜4.5mm、前記貫通孔の前記伸縮方向と直交する方向の中心間隔が1.2〜5.25mm、かつ前記貫通孔の前記伸縮方向と直交する方向の長さが0.7〜3.0mmである、請求項2記載の吸収性物品。
The stretching stress when the elastic film is stretched four times in the stretch direction is 4 to 12 N / 35 mm,
In a state where the non-stretchable region is extended to the elastic limit in the stretchable direction, the center interval in the stretchable direction of the through hole is 0.7 to 3.0 mm, and the length of the throughhole in the stretchable direction is 1.0. -4.5 mm, the center interval in the direction perpendicular to the expansion / contraction direction of the through hole is 1.2-5.25 mm, and the length of the through hole in the direction orthogonal to the expansion / contraction direction is 0.7-3. The absorptive article according to claim 2 which is 0 mm.
前記非伸縮領域では、前記シート接合部における前記第1シート層及び第2シート層の間以外では、前記第1シート層及び第2シート層と前記弾性フィルムとが接合されておらず、かつ自然長の状態で前記シート接合部の前記伸縮方向両側に前記弾性フィルムの貫通孔の周縁及び前記シート接合部が離間されて形成された隙間を有している、請求項3記載の吸収性物品。   In the non-stretchable region, the first sheet layer, the second sheet layer, and the elastic film are not bonded to each other except between the first sheet layer and the second sheet layer in the sheet bonding portion, and are naturally The absorptive article according to claim 3 which has the crevice formed by separating the peripheral edge of the penetration hole of said elastic film, and said sheet joined part on both sides of said expansion-contraction direction of said sheet joined part in the state of length. 前記伸縮領域は、前記伸縮方向の弾性限界伸びが200%以上とされており、前記非伸縮領域は、前記伸縮方向の弾性限界伸びが120%以下とされている、請求項1〜4のいずれか1項に記載の吸収性物品。   The elastic region has an elastic limit elongation of 200% or more in the expansion / contraction direction, and the non-contraction region has an elastic limit elongation of 120% or less in the expansion / contraction direction. The absorbent article of Claim 1. 前身頃及び後身頃を構成する外装体と、この外装体に固定された、吸収体を含む内装体とを備え、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てサイドシール部が形成されることにより、胴周り部が環状に形成されるとともに、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であって、
前記前身頃及び後身頃の少なくとも一方における前記外装体の胴周り部は、前記吸収体と重なる前後方向範囲として定まる吸収体領域を有しており、少なくともこの吸収体領域における前記サイドシール部間に対応する幅方向範囲にわたり前記弾性フィルム伸縮構造を、その伸縮方向が幅方向となるように備えており、
前記吸収体領域は、その幅方向中間部が前記非伸縮領域とされるとともに、この非伸縮領域と前記サイドシール部との間に対応する幅方向範囲が前記伸縮領域とされている、
請求項1〜5のいずれか1項に記載の吸収性物品。
An exterior body constituting the front body and the back body, and an interior body including an absorber fixed to the exterior body, both sides of the exterior body in the front body and both sides of the exterior body in the back body are respectively A pants type disposable diaper in which a waist portion and a pair of left and right leg openings are formed while a waistline portion is formed in an annular shape by joining and forming a side seal part,
The waist portion of the exterior body in at least one of the front body and the back body has an absorber region that is defined as a front-rear direction range that overlaps the absorber, and at least between the side seal portions in the absorber region. The elastic film stretchable structure is provided over the corresponding width direction range so that the stretch direction is the width direction,
The absorber region has a width direction intermediate portion as the non-stretchable region, and a width direction range corresponding to the space between the non-stretchable region and the side seal portion is the stretchable region.
The absorbent article of any one of Claims 1-5.
前記弾性フィルム伸縮構造が前記ウエスト端部領域まで延在されておらず、
前記ウエスト端部領域における、前記サイドシール部間に対応する幅方向範囲全体が、幅方向に沿って取り付けられた細長状のウエスト部弾性部材の収縮力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、伸縮領域とされている、請求項6記載の吸収性物品。
The elastic film stretchable structure does not extend to the waist end region,
The entire width direction range corresponding to the space between the side seal portions in the waist end region is contracted in the width direction by the contraction force of the elongated waist elastic member attached along the width direction. The absorbent article according to claim 6, wherein the absorbent article is a stretchable region that is stretchable.
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