JP5024915B2

JP5024915B2 - Pants-type disposable diapers

Info

Publication number: JP5024915B2
Application number: JP2005023274A
Authority: JP
Inventors: 敦子白井
Original assignee: Daio Paper Corp
Current assignee: Daio Paper Corp
Priority date: 2004-06-30
Filing date: 2005-01-31
Publication date: 2012-09-12
Anticipated expiration: 2025-01-31
Also published as: JP2006043415A

Description

本発明は、身体に対するフィット性、おむつのずり落ち防止性に優れ、かつ見栄えの良くはき心地の良いパンツ型使い捨ておむつに関する。 The present invention relates to a pants-type disposable diaper that is excellent in fit to the body and prevention of diaper slipping, and has good appearance and comfort.

従来より、パンツ型使い捨ておむつでは、体液の吸収を図る吸収体を身体に装着するため、前記吸収体を保持する不織布などに対して弾性伸縮部材を配設し、身体へのフィット性を向上させるようにしている。 Conventionally, in a pants-type disposable diaper, in order to attach an absorbent body that absorbs body fluid to the body, an elastic elastic member is disposed on the nonwoven fabric or the like that holds the absorbent body to improve fit to the body. I am doing so.

例えば、下記特許文献１では、図８(A)に示されるように、透液性トップシート５０と、不透液性バックシート５１と、これら両シート５０、５１間に配置される吸収体５２とを有し、前身頃と後身頃との両側部を接合してウエスト開口部と一対のレッグ開口部とを形成したパンツ型使い捨て紙おむつであって、前記ウエスト開口部の周囲に沿ってウエスト部弾性伸縮部材４８、４８…を配設するとともに、前記両レッグ開口部には、周縁に沿って実質的に連続して脚部弾性部材５３、５３…を配設し、かつ腰回りに腰部弾性伸縮部材４９、４９…を配設し、使い捨ておむつを身体にフィットさせるようにしている。 For example, in the following Patent Document 1, as shown in FIG. 8 (A), a liquid-permeable top sheet 50, a liquid-impermeable back sheet 51, and an absorber 52 disposed between both the sheets 50 and 51. A pants-type disposable paper diaper in which both sides of the front body and the back body are joined to form a waist opening and a pair of leg openings, and the waist portion extends around the waist opening. Are provided with elastic elastic members 48, 48..., And leg elastic members 53, 53. The elastic members 49, 49... Are arranged so that the disposable diaper fits the body.

前述の使い捨ておむつのように、ウエスト開口部、レッグ開口部、腰回り部の３つの部分にそれぞれ、独立的に弾性伸縮部材を配設した場合には、紙おむつに必要な最小限のフィットは得られるけれども、必ずしも使用者の満足が得られるものではなかった。
このような問題点に鑑み、下記特許文献２では、図９に示されるように、おむつのずり下がりを防止するべく、胴部ギャザーのうち、腹部側もしくは背中側または両方のギャザーとして、少なくとも、股部方向へ膨らむように湾曲して形成された下方湾曲ギャザー５４を有し、かつ該下方湾曲ギャザー５４の最下部がレッグ開口部の最上端よりも下側にある使い捨ておむつが開示されている。 As in the case of the disposable diapers described above, when elastic elastic members are provided independently at the three parts of the waist opening, leg opening, and waistline, the minimum fit required for the disposable diaper is obtained. However, user satisfaction has not always been achieved.
In view of such a problem, in Patent Document 2 below, as shown in FIG. 9, as a gather on the abdomen side or the back side, or both, A disposable diaper having a downward curved gather 54 formed so as to bend toward the crotch portion and having the lowermost portion of the downward curved gather 54 located below the uppermost end of the leg opening is disclosed. .

また、下記特許文献３では、図１０に示されるように、吸収性本体と外装部材からなり、外装部材の前身頃及び後身頃にはそれぞれ複数本の伸縮弾性材料からなる第１伸縮弾性部材５５，５５…及び第２伸縮弾性部材５６，５６…が配置されており、これら伸縮弾性部材５５…、５６…は、それぞれが前後身頃の一方の側縁部から股下部を経て他方の側縁部に至っており、そのうちの少なくとも一部分が一対の脚回り開口部に沿って配置され、さらに股下部では一定の間隔で配置されているパンツ型使い捨ておむつが開示されている。 Further, in Patent Document 3 below, as shown in FIG. 10, the first stretchable elastic member 55 is composed of an absorbent main body and an exterior member, and each of the front and back bodies of the exterior member is composed of a plurality of stretchable elastic materials. , 55... And second stretchable elastic members 56, 56..., And these stretchable elastic members 55. A pants-type disposable diaper is disclosed in which at least a part of the diaper is disposed along a pair of leg openings and the crotch portion is disposed at regular intervals.

また、下記特許文献４では、一層のズレ落ち防止を図るために、図１１に示されるように、トップシートとバックシートと吸収体とを有する本体を備え、該本体は腹側部と背側部とに区分されており、該腹側部及び背側部各々の左右両側縁部とを接合固定してウエスト開口部及びレッグ開口部が形成されており、ウエスト開口部及びレッグ開口部には、各々の周縁部全周に沿って実質的に連続したギャザーを形成するウエスト弾性部材５７及びレッグ弾性部材５８は配されており、また、腰回り弾性部材の腹側及び／又は背側に複数本の腰回り弾性部材５９，５９…が配され、この腰回り弾性部材５９，５９…は、股下部側に変位した形状に配置されており、該腰回り弾性部材５９．５９…の変位量は腹側部の中央部で最大とした使い捨てパンツ型おむつが開示されている。 Further, in Patent Document 4 below, as shown in FIG. 11, in order to further prevent misalignment, a main body having a top sheet, a back sheet, and an absorber is provided, and the main body includes an abdominal side and a back side. The waist opening and the leg opening are formed by joining and fixing the left and right side edges of each of the abdomen and the dorsal side, and the waist opening and the leg opening are The waist elastic member 57 and the leg elastic member 58 forming a substantially continuous gather along the entire circumference of each peripheral portion are arranged, and a plurality of waist elastic members 57 and / or back sides of the waist elastic member are arranged. Are arranged in a shape displaced toward the crotch part, and the amount of displacement of the waist elastic member 59.59. Is the largest disposable pouch at the center of the ventral side Tsu-type diaper is disclosed.

さらに、下記特許文献５では、図１２に示されるように、パンツの前身頃及び後身頃全域に、左右方向に走行する弾性体条６０，６０…を、夫々非交差状に多数本配したギャザー構成を有するとともに、前記前身頃及び後身頃の弾性体条６０，６０…は、左右のシールラインでは前後に略均等に配され、各弾性体条６０，６０…は夫々中間部に行くに従い股下部に向かって膨出湾曲状に張り出しているパンツタイプ紙おむつが開示されている。
特開平７−２６５３５７号公報特開平７−２９９０９４号公報特開平１１−３６１０３号公報特開２００１−２５８９３１号公報特開２００１−２０４７６２号公報 Furthermore, in Patent Document 5 shown below, as shown in FIG. 12, a gathered line of elastic body strips 60, 60, which run in the left-right direction throughout the front and back of the pants. The elastic bodies 60, 60... Of the front body and the back body are arranged substantially evenly in the front and rear in the left and right seal lines, and the elastic bodies 60, 60. A pants-type disposable diaper that protrudes in a curved shape toward the part is disclosed.
JP-A-7-265357 JP-A-7-299094 JP-A-11-36103 JP 2001-258931 A JP 2001-204762 A

本願発明者等は、従来にも増して紙おむつを身体に違和感を与えることなく、フィットさせ得るとともに、おむつのずり落ちを効果的に防止し得る弾性部材配置の検討を行った。その結果、下記の知見を得るに至った。
(1)複雑な立体形状を成している身体に紙おむつ全体をフィットさせるには、特許文献１に示すように、ウエスト開口部、レッグ開口部、腰回り部の３つの部分にそれぞれ、独立的に弾性伸縮部材を配設するのではなく、おむつ全体に弾性伸縮部材を配置し、紙おむつを均等に身体に密着させる必要があること。
(2)身体の前側部分は、身体の後側に比べて臀部のような引掛かりとなる膨らみがないため、紙おむつのずり落ちは主として前身頃側で顕著に発生する傾向にあること。
(3)紙おむつを身体に密着させるに当たり、身体の前側部分に比べて身体の後側は臀部の膨らみによって強い立体形状を成しているとともに、複雑な曲線形状を成しており、身体に違和感を与えることなく紙おむつをフィットさせるには、前記臀部の立体形状を考慮した弾性部材の配置パターンとしなければならないこと。
(4)脚回り弾性部材は、実質的に脚回りラインに沿って配設されているが、この脚回り弾性部材は２，３本程度の弾性伸縮部材を間隔を密にして実質的に一束として（以下、束状弾性部材という。）、あたかもこれら弾性伸縮部材によって１本のラインを形成するように配置されており、主としてレッグ開口縁と身体との隙間を塞ぐための機能しか担っておらず、吸収体を身体に密着させるための機能は有していないこと。 The inventors of the present application have examined an elastic member arrangement that allows a disposable diaper to be fitted to the body without causing a sense of incongruity to the body, as well as an effective prevention of diaper slipping. As a result, the following knowledge was obtained.
(1) In order to fit the whole disposable diaper to the body having a complicated three-dimensional shape, as shown in Patent Document 1, each of the three parts of the waist opening, the leg opening, and the waistline is independent. It is necessary to arrange an elastic elastic member over the entire diaper and evenly attach the paper diaper to the body instead of arranging an elastic elastic member.
(2) The front part of the body does not bulge like a buttocks compared to the back side of the body, so that the diaper slippage tends to occur mainly on the front body side.
(3) When the disposable diaper is in close contact with the body, the back side of the body has a strong three-dimensional shape due to the swelling of the buttocks compared to the front side part of the body, and has a complicated curved shape, which makes the body uncomfortable In order to fit a paper diaper without giving a rust, the arrangement pattern of the elastic member must be in consideration of the three-dimensional shape of the collar.
(4) The leg-hole elastic members are disposed substantially along the leg-line, but the leg-hole elastic members are substantially equal to each other with two or three elastic elastic members closely spaced. As a bundle (hereinafter referred to as a bundle-like elastic member), these elastic elastic members are arranged so as to form a single line, and are mainly responsible for the function of closing the gap between the leg opening edge and the body. There is no function to make the absorber adhere to the body.

以上のような観点から前述した特許文献を考察してみると、
(1)上記特許文献２に係る使い捨ておむつでは、下方湾曲ギャザーを配設したことによって、多少のおむつのずり下がり防止は望めるものの、３本程度を一組として配設した程度では、その効果は僅かである。また、後身頃に対して何らの工夫が成されておらず、ずり下がり防止と身体への密着性は十分に得られていない。
(2)上記特許文献３に係る使い捨ておむつの場合は、股下部に複数の弾性伸縮部材を間隔をおいて配置することにより該股下部での漏れ防止が高まるようになるけれども、後身頃側に後身頃の一方の側縁部から股下部を経て他方の側縁部に至るように配設された第２伸縮弾性部材と、後側の腰回り弾性部材とによって挟まれた部分は大きく弾性部材が配設されていない領域となっており、該領域では吸収体を身体に密着させることはできない構造となっている。さらに、股下部では第１伸縮弾性部材と第２伸縮弾性部材がおむつ長手方向に一定の間隔で配置されているが、これら股下部に配置された弾性部材の収縮方向は股下幅方向に沿っており、この股下幅方向に発生する伸縮力が吸収体を縮こまらせてしまうなどの問題がある。 Considering the above-mentioned patent document from the above viewpoint,
(1) In the disposable diaper according to the above-mentioned Patent Document 2, it is possible to prevent some diapers from falling down by arranging the downward curved gathers. There are few. In addition, no ingenuity has been made for the back body, and sliding prevention and adhesion to the body have not been sufficiently obtained.
(2) In the case of the disposable diaper according to the above-mentioned Patent Document 3, by arranging a plurality of elastic elastic members at the crotch part at intervals, leakage prevention at the crotch part is enhanced, The portion sandwiched between the second stretchable elastic member disposed so as to reach the other side edge portion from the one side edge portion of the back body through the crotch portion and the waist elastic member on the rear side is largely elastic member Is an area where no absorber is disposed, and in this area, the absorber cannot be brought into close contact with the body. Furthermore, in the crotch part, the first elastic elastic member and the second elastic elastic member are arranged at regular intervals in the diaper longitudinal direction. The contraction direction of the elastic member arranged in the crotch part is along the crotch width direction. In addition, there is a problem that the stretching force generated in the crotch width direction causes the absorber to be shrunk.

(3)上記特許文献４に係る使い捨ておむつの場合は、腹側及び／又は背側配設される腰回り弾性部材を股下部側に変位した湾曲形状に配置することにより、持上げ方向に発生する分力によって紙おむつのずり下がりを防止するものであり、一定の効果は望めるようになる。しかしながら、腰回り弾性部材の上方向分力を発生させるには、腰脇部（接合側縁）できっちりと位置が固定されていることが条件となるが、腰回り弾性部材を湾曲形状に変位させているため、腰回り弾性部材の湾曲部が固定側となれば、むしろ腰脇部側に下方向への力が作用することになり却ってずり落ちが生じることになる。従って、腰回り弾性部材を単に湾曲状に変位させただけでは所望のずり落ち防止効果は得られていない。また、脚回り弾性部材は脚回りのカットラインに沿ってマクロ的にはあたかも線状に配置されているだけであり、レッグ開口縁と身体との隙間を塞ぐための機能しか担っておらず、吸収体を身体に密着させるための機能は有しない。また、脚回り弾性部材は、股下部で幅方向に沿って横断するように配置されており、この股下幅方向に発生する伸縮力が吸収体を縮こまらせてしまうなどの問題もある。
(4)上記特許文献５に係る使い捨て紙おむつは、腰回り弾性部材を股下部側に変位した湾曲形状に配置する点は上記特許文献４と同様であるが、その程度が異なっている。すなわち、前記湾曲変位量を股間部までとすることにより紙おむつ全体に伸縮性を与えているようにも見えるが、腰回り弾性部材を湾曲形状に変位させているため、腰回り弾性部材の湾曲部が固定側となれば、むしろ腰脇部側に下方向への力が作用することになり、該腰脇部にずり落ちが生じるようになる。
そこで本発明の主たる課題は、第１に体液吸収時において確実に紙おむつのずり落ちを防止し得る構造とすること、第２に紙おむつをショーツやブリーフのように身体のラインに沿わせて密着させることにより、はき心地の良いものとすること、その結果、吸収体を身体に密着させ漏れ防止効果が高まるようにすること等にある。第３に穿き易さを向上させることにある。 (3) In the case of the disposable diaper according to Patent Document 4, the waistline elastic member disposed on the abdominal side and / or the back side is disposed in a curved shape that is displaced toward the crotch side, thereby generating in the lifting direction. The component force prevents the paper diaper from sliding down, and a certain effect can be expected. However, in order to generate the upward component of the waist elastic member, it is necessary that the waist side part (joining side edge) is fixed in position, but the waist elastic member is displaced into a curved shape. Therefore, if the curved portion of the waistline elastic member is on the fixed side, a downward force is applied to the waistside side rather, and slipping occurs. Accordingly, the desired slip-off preventing effect cannot be obtained by simply displacing the waist elastic member in a curved shape. In addition, the leg elastic member is only arranged in a macro form along the leg cut line, and has only a function for closing the gap between the leg opening edge and the body, It does not have a function for bringing the absorber into close contact with the body. Moreover, the leg-hole elastic member is disposed so as to cross the crotch portion along the width direction, and there is a problem that the elastic force generated in the crotch width direction causes the absorbent body to contract.
(4) The disposable paper diaper according to Patent Document 5 is the same as that of Patent Document 4 in that the waist elastic member is arranged in a curved shape displaced to the crotch part side, but the degree is different. That is, it seems that the entire amount of the disposable diaper is stretchable by setting the amount of bending displacement up to the crotch, but the waist elastic member is displaced into a curved shape, so that the bending portion of the waist elastic member If it becomes a fixed side, the downward force will act on the waist side part side rather, and a slip-off will arise in this waist side part.
Accordingly, the main problems of the present invention are to firstly make the structure capable of reliably preventing the paper diaper from slipping down when absorbing bodily fluids, and secondly to attach the paper diaper along the body line like shorts or briefs. Therefore, it is to make it comfortable to wear and, as a result, to make the absorber adhere to the body so that the leakage preventing effect is enhanced. The third is to improve ease of wearing.

前記課題を解決するために請求項１に係る本発明として、平面形状が略方形状の吸収体を含む吸収性本体と、この吸収性本体の外面側に一体的に設けられた外装シートとからなり、おむつ股下部で折り畳まれ前記外装シートの前身頃と後身頃とが両側部において接合されることにより、製品状態でウエスト開口部及び左右一対のレッグ開口部が形成されたパンツ型使い捨ておむつにおいて、
前記外装シートは、前記ウエスト開口部回りに配置されたウエスト部弾性部材と、前身頃及び後身頃に上下方向に間隔をおいて水平方向に沿って配置された複数の腰回り弾性部材群とを有するとともに、前身頃及び後身頃のそれぞれにおいて、前身頃と後身頃とを接合する一方側接合縁から股下側に延び、股下側を迂回して前身頃と後身頃との他方側接合縁に到達するとともに、互いに交差することなく間隔をおいて配置された複数本の湾曲弾性部材群を備え、かつこの湾曲弾性部材群の始終端は、前身頃と後身頃との接合縁のほぼ上部から下部の範囲に亘り所定の間隔で接続されるとともに、前身頃と後身頃との接合縁部における前記湾曲弾性部材群の配置間隔は、股下部における前記湾曲弾性部材群の配置間隔とほぼ同じとされ、かつ２、３本程度の弾性伸縮部材を間隔を密にし実質的に一束として脚回りラインに沿って配設される脚回り弾性部材を有さず、
前記後身頃側に配置された湾曲弾性部材群は、股下部において、おむつの股下部折り畳みラインを基準に前身頃側に偏倚させており、
前記前身頃側に配置された湾曲弾性部材群は、前記吸収性本体の側縁との交差部において、前記湾曲弾性部材群と吸収性本体側縁との鋭角側交差角が２８°以下２０°以上とされ、かつ前記後身頃側に配置された湾曲弾性部材群は、前記吸収性本体の側縁との交差部において、前記湾曲弾性部材群と吸収性本体側縁との鋭角側交差角が４５°以上６０°以下とされることを特徴とするパンツ型使い捨ておむつが提供される。 In order to solve the above-mentioned problem, the present invention according to claim 1 includes: an absorbent main body including an absorbent body having a substantially square planar shape ; and an exterior sheet integrally provided on the outer surface side of the absorbent main body. In a pants-type disposable diaper in which a waist opening and a pair of left and right leg openings are formed in a product state by being folded at the crotch lower part of the diaper and joining the front and back bodies of the exterior sheet on both sides ,
The exterior sheet includes a waist elastic member arranged around the waist opening, and a plurality of waist elastic members arranged along the horizontal direction with a space in the vertical direction between the front body and the back body. In addition, each of the front body and the back body extends from the one side joint edge that joins the front body and the back body to the crotch side, bypasses the crotch side and reaches the other side joint edge of the front body and the back body And a plurality of curved elastic member groups arranged at intervals without crossing each other, and the start and end of the curved elastic member groups are substantially from the upper part to the lower part of the joint edge between the front body and the rear body. And the arrangement interval of the curved elastic member group at the joint edge between the front body and the back body is substantially the same as the arrangement interval of the curved elastic member group at the crotch part. and 2 Apart three approximately resilient and elastic members as substantially Ichitaba in close without a leg elastic member disposed along the leg line,
The curved elastic member group arranged on the back body side is biased toward the front body side with respect to the crotch lower part folding line of the diaper in the crotch part,
The curved elastic member group disposed on the front body side has an acute angle crossing angle between the curved elastic member group and the absorbent main body side edge of 28 ° or less and 20 ° at the intersection with the side edge of the absorbent main body . The curved elastic member group disposed on the back body side and having the above-mentioned configuration has an acute angle crossing angle between the curved elastic member group and the absorbent main body side edge at the intersection with the side edge of the absorbent main body. A pants-type disposable diaper characterized by being 45 ° or more and 60 ° or less is provided.

上記請求項１記載の本発明においては、特に外装シートの後身頃において、ウエスト部弾性部材と腰回り弾性部材群の他に、従来の紙おむつのように、レッグ開口部に沿って配設される束状の脚回り弾性部材を設けず、前身頃及び後身頃のそれぞれにおいて、前身頃と後身頃とを接合する一方側接合縁から股下側に延び、股下側を迂回して前身頃と後身頃との他方側接合縁に到達するとともに、互いに交差することなく間隔をおいて配置された複数本の湾曲弾性部材群を、その始終端が前身頃と後身頃との接合縁のほぼ上部から下部の範囲に亘り所定の間隔で接続されている態様で配置するようにした。
先ず、本発明の紙おむつでは、前記湾曲弾性部材群は、腰回り弾性部材とは別の弾性部材により、始終端を前身頃と後身頃との接合縁として配置されている。その結果、腰回り弾性部材及び湾曲弾性部材群が高い線密度で前身頃と後身頃との接合縁（以下、脇部接合縁ともいう。）に集約されるため、外装シートは前記腰脇部できっちりと固定され、前記湾曲弾性部材群によってきっちりと上方向への力を作用させ得るようになるため、前記湾曲弾性部材群によって紙おむつのずり落ちを防止するとともに、外装シートを身体に密着保持することができる。ここで、前記湾曲弾性部材群は一束のラインを形成するように配置されていない点で従来の脚回り弾性部材とは機能および配置態様が異なるものである。 In the present invention according to the first aspect, particularly in the rear body of the exterior sheet, in addition to the waist elastic member and the waist elastic member group, like the conventional paper diaper, it is disposed along the leg opening. Without a bundle of leg elastic members, the front and back bodies extend from the one-side joint edge that joins the front and back bodies to the crotch side, bypassing the crotch side, and the front and back bodies A plurality of curved elastic member groups that are arranged at intervals without crossing each other, and whose start and end are substantially from the upper part to the lower part of the joint edge between the front body and the back body It was made to arrange | position in the aspect connected with the predetermined space | interval over the range.
First, in the disposable diaper of the present invention, the curved elastic member group is arranged with an elastic member different from the waist elastic member as a joining edge between the front body and the back body. As a result, the waist elastic member and the curved elastic member group are gathered at a joint edge (hereinafter also referred to as a side joint edge) between the front body and the back body with a high linear density. The curved elastic member group is firmly fixed and can be applied with an upward force, so that the curved elastic member group prevents the paper diaper from slipping down and holds the exterior sheet in close contact with the body. can do. Here, the curved elastic member group is different in function and arrangement from the conventional leg-hole elastic member in that it is not arranged so as to form a bundle of lines.

本発明においては、前身頃側に配置された湾曲弾性部材群の配置パターンと、後身頃側に配置された湾曲弾性部材群との配置パターンとを異ならせている。具体的には、前身頃側に配置された湾曲弾性部材群は、前記吸収性本体の側縁との交差部において、前記湾曲弾性部材群と吸収性本体側縁との鋭角側交差角が２８°以下２０°以上となる曲線配置とし、一方、後身頃側に配置された湾曲弾性部材群は、前記吸収性本体の側縁との交差部において、前記湾曲弾性部材群と吸収性本体側縁との鋭角側交差角が４５°以上６０°以下の曲線配置とするものである。 In the present invention, the arrangement pattern of the curved elastic member group arranged on the front body side is different from the arrangement pattern of the curved elastic member group arranged on the rear body side. Specifically, in the curved elastic member group disposed on the front body side, an acute angle crossing angle between the curved elastic member group and the absorbent main body side edge is 28 at the intersection with the side edge of the absorbent main body. The curved elastic member group disposed on the back body side has a curved arrangement with an angle of 20 ° or less, and the curved elastic member group and the absorbent body side edge at the intersection with the side edge of the absorbent body. And an acute angle side crossing angle of 45 ° to 60 ° .

身体の前側部分は、身体後側に比べて臀部のような引掛かりとなる膨らみがないため、紙おむつのずり落ちは主として前身頃側で顕著に発生する傾向にあるため、相対的にきつい傾斜角度で弾性部材群を配置するものとする。 Since the front part of the body does not have a bulge that becomes like a buttocks compared to the back side of the body, slipping of disposable diapers tends to be noticeable mainly on the front body side. It is assumed that the elastic member group is arranged.

一方、後身頃側では、紙おむつのずり落ちよりも身体へのフィット性を重要視し、臀部の膨らみ形状に対して外装シートをフィットさせるために、臀部の膨らみに対し極力沿う方向に伸縮力を作用させるべく、相対的に緩い傾斜角度で弾性部材群を配置するものとする。 On the other hand, on the back body side, emphasis is placed on the fit to the body rather than slipping off of the paper diaper, and in order to fit the exterior sheet to the bulge shape of the buttock, the stretching force in the direction along the bulge of the buttock as much as possible In order to act, the elastic member group is arranged at a relatively gentle inclination angle.

さらに本発明は、後身頃側に配置された湾曲弾性部材群を、股下部において、おむつの股下部折り畳みラインを基準に前身頃側に偏倚させるようにするものである。臀部側で生じる紙おむつのずり落ちを無くすとともに、外装シートをお尻部での弛みを無くして身体側にフィットさせることができる。 Further, according to the present invention, the curved elastic member group disposed on the back body side is biased toward the front body side in the crotch part with reference to the crotch part folding line of the diaper. It is possible to eliminate slippage of the paper diaper that occurs on the buttock side and to fit the exterior sheet to the body side by eliminating slack in the buttocks.

請求項２に係る本発明として、前記湾曲弾性部材群は前身頃及び後身頃のそれぞれにおいて、少なくとも５本以上配置されている請求項１記載のパンツ型使い捨ておむつが提供される。紙おむつのズリ落ちを効果的に防止するには、前記湾曲弾性部材群は、少なくとも５本以上、好ましくは７本以上配置するのが望ましい。
請求項３に係る本発明として、前記前身頃と後身頃との接合縁部において、前身頃側に配置された湾曲弾性部材群の内、最もウエスト開口部寄りに位置する弾性部材は、ウエスト部弾性部材の最下側弾性部材からの距離が２０mm以内とされる請求項１，２いずれかに記載のパンツ型使い捨ておむつが提供される。 As the present invention according to claim 2, there is provided the pants-type disposable diaper according to claim 1, wherein at least five or more of the curved elastic member groups are arranged in the front body and the back body. In order to effectively prevent slippage of the paper diaper, it is desirable to arrange at least 5 curved elastic member groups, preferably 7 or more curved elastic member groups.
As the present invention according to claim 3, in the joint edge portion of the front body and the back body, the elastic member located closest to the waist opening in the group of curved elastic members arranged on the front body side is a waist portion. The underpants-type disposable diaper according to any one of claims 1 and 2, wherein a distance of the elastic member from the lowermost elastic member is within 20 mm.

上記請求項３記載の本発明は、前記前身頃と後身頃との接合縁部において、前身頃側に配置された湾曲弾性部材群の内、最もウエスト開口部寄りに位置する弾性部材をウエスト部弾性部材の最下側弾性部材からの距離が２０mm以内に配置するものである。すなわち、湾曲弾性部材群の内、最も上側に位置する弾性部材の接合部側縁での位置をウエスト部にかなり近接させて配置するものである。その結果、装着に際して着用者がウエスト部の脇を掴んで上方に引き上げた際、前記湾曲弾性部材の弾性力によって紙おむつの前身頃側を上方に引上げ易くなり、穿き易さが向上するようになる。 According to the third aspect of the present invention, the elastic member located closest to the waist opening in the group of curved elastic members arranged on the front body side is bonded to the waist portion at the joint edge between the front body and the back body. The distance from the lowermost elastic member of the elastic member is arranged within 20 mm. That is, the position at the joint side edge of the uppermost elastic member in the group of curved elastic members is arranged so as to be quite close to the waist. As a result, when the wearer grips the side of the waist part and pulls it upward during wearing, the front body side of the disposable diaper is easily pulled upward by the elastic force of the curved elastic member, and the ease of wearing is improved. .

請求項４に係る本発明として、前記前身頃と後身頃との接合縁部において、後身頃側に配置された湾曲弾性部材群の内、最もウエスト開口部寄りに位置する弾性部材は、ウエスト部弾性部材の最下側弾性部材からの距離が２０mm以内とされる請求項１〜３いずれかに記載のパンツ型使い捨ておむつが提供される。請求項４記載の発明も請求項３記載の発明と同様の作用により、着用者がウエスト部の脇を掴んで上方に引き上げた際、前記湾曲弾性部材の弾性力によって紙おむつの後身頃側を上方に引上げ易くなり、穿き易さが向上するようになる。 As the present invention according to claim 4, in the joint edge portion of the front body and the back body, the elastic member located closest to the waist opening in the curved elastic member group disposed on the back body side is a waist portion. The pants-type disposable diaper according to any one of claims 1 to 3, wherein a distance from the lowermost elastic member of the elastic member is within 20 mm. According to the fourth aspect of the present invention, when the wearer grasps the side of the waist part and pulls it upward, the rear body side of the disposable diaper is moved upward by the elastic force of the curved elastic member. It becomes easy to pull it up and the ease of wearing is improved.

請求項５に係る本発明として、前記湾曲弾性部材群の内、最も股下側に位置する弾性部材はおむつの股下部折り畳みラインからの距離が±５０mm以内とされる請求項１〜４いずれかに記載のパンツ型使い捨ておむつが提供される。 As the present invention according to claim 5, in the curved elastic member group, the elastic member located closest to the crotch side has a distance from the crotch lower folding line of the diaper within ± 50 mm. The described pants-type disposable diaper is provided.

上記請求項５記載の本発明では、湾曲弾性部材群の内、最股下側に位置する弾性部材はおむつの股下部折り畳みラインからの距離が±５０mm以内となるように、すなわち湾曲弾性部材群がきっちりと股下近傍領域を迂回するように配置するものである。 In the present invention described in claim 5, the elastic member located on the most crotch side of the group of curved elastic members is such that the distance from the crotch lower folding line of the diaper is within ± 50 mm, that is, the group of curved elastic members is It is arranged so as to bypass the crotch vicinity region exactly.

前記湾曲弾性部材群が描くラインが前述のように股下部近傍領域を迂回する大波の曲線形状で配置することにより、外装シートを身体に対してきっちりと密着保持し得るようになる。 By arranging the line drawn by the curved elastic member group in a curved shape of a large wave that bypasses the region near the crotch portion as described above, the exterior sheet can be tightly held with respect to the body.

請求項６に係る本発明として、前記前身頃及び後身頃に配置された湾曲弾性部材群は、股下部又は股下側の迂回部において、弧状曲線状に方向転換されている請求項１〜５いずれかに記載のパンツ型使い捨ておむつが提供される。 As a sixth aspect of the present invention according to any one of the first to fifth aspects, the curved elastic member group disposed in the front body and the back body is changed in an arcuate curve at a crotch part or a detour part on the crotch side. A pants-type disposable diaper according to crab is provided.

上記請求項６記載の本発明においては、前記湾曲部材群は、股下部又は股下側の迂回部において、弧状曲線状に方向転換させるものである。すなわち、弧状曲線状に方向転換させることによって紙おむつの幅方向に作用する力を極小化でき、吸収体の幅方向への縮こまりを防止することができる。 In the present invention as set forth in claim 6, the bending member group changes its direction in an arcuate curve at the crotch part or the detour part on the crotch side. That is, the force acting in the width direction of the disposable diaper can be minimized by changing the direction to the arcuate curve, and the shrinkage of the absorber in the width direction can be prevented.

請求項７に係る本発明として、前記吸収体上において、前記湾曲弾性部材群を切断し、不連続としてある請求項１〜６いずれかに記載のパンツ型使い捨ておむつが提供される。 The present invention according to claim 7 provides the pant-type disposable diaper according to any one of claims 1 to 6, wherein the curved elastic member group is cut and discontinuous on the absorber.

上記請求項７記載の本発明においては、吸収体上において、前記湾曲弾性部材群を切断し、不連続とするものである。従って、吸収体の幅方向への縮こまりを確実に防止することが可能となる。 In the present invention according to claim 7, the curved elastic member group is cut and discontinuous on the absorber. Therefore, it is possible to reliably prevent the absorber from being contracted in the width direction.

請求項８に係る本発明として、前記吸収体上において、前記腰回り弾性部材群を切断し、不連続としてある請求項１〜７いずれかに記載のパンツ型使い捨ておむつが提供される。 The present invention according to claim 8 provides the pants-type disposable diaper according to any one of claims 1 to 7, wherein the waist elastic member group is cut and discontinuous on the absorber.

上記請求項８記載の本発明においては、吸収体上において、前記腰回り弾性部材群を切断し、不連続とするものである。従って、吸収体の幅方向への縮こまりを確実に防止することが可能となる。 In the present invention according to claim 8, the waist elastic member group is cut and discontinuous on the absorber. Therefore, it is possible to reliably prevent the absorber from being contracted in the width direction.

請求項９に係る本発明として、前記前身頃側に配置された湾曲弾性部材群の内の最股下側弾性部材と、前記後身頃側に配置された湾曲弾性部材群の内の最股下側弾性部材とは、股下部において互いに交差することなく近接している請求項１〜８いずれかに記載のパンツ型使い捨ておむつが提供される。
上記請求項９記載の発明においては、前記前身頃側に配置された湾曲弾性部材群の内の最股下側弾性部材と、前記後身頃側に配置された湾曲弾性部材群の内の最股下側弾性部材とを、股下部において互いに交差させることなく近接させて配置するものである。従って、股下部において、前記湾曲弾性部材群によって吸収性本体を均等の圧力で身体側に押付け密着させるため、身体との隙間が封鎖され、高い漏れ防止効果が発揮されるようになる。 As the present invention according to claim 9, the most crotch side elastic member in the curved elastic member group disposed on the front body side and the most crotch side elasticity in the curved elastic member group disposed on the back body side. The member is provided with a pants-type disposable diaper according to any one of claims 1 to 8, which are close to each other at the crotch portion without intersecting each other.
In the invention according to claim 9, the most crotch side elastic member in the curved elastic member group arranged on the front body side and the most crotch side in the curved elastic member group arranged on the back body side. The elastic members are arranged close to each other without crossing each other at the crotch part. Therefore, in the crotch part, the absorbent main body is pressed and adhered to the body side with equal pressure by the curved elastic member group, so that a gap between the body and the body is sealed, and a high leakage prevention effect is exhibited.

以上詳説のとおり本発明によれば、すべての弾性部材は、脇部接合縁を始終端として配置されているため、相対的に脇部接合縁での締め付け力が高く設定でき、その結果、すべての弾性部材は前記脇部接合縁を固定点として伸縮力を発揮するようになるため、体液吸収時において確実に紙おむつのずり落ちを防止し得るようになる。また、紙おむつをショーツやブリーフのように身体のラインに沿わせて密着させることにより、はき心地の良いものとなるとともに、漏れ防止効果が高まるようになる。さらに、穿き易さが向上するようになる。 As described above in detail, according to the present invention, since all the elastic members are arranged with the side joint edge as the starting end, the tightening force at the side joint edge can be set relatively high. Since the elastic member exhibits a stretching force with the side joint edge as a fixed point, it is possible to reliably prevent the diaper from slipping down when absorbing body fluid. In addition, when the paper diaper is brought into close contact with the body line like shorts or briefs, it becomes comfortable to wear and the leakage prevention effect is enhanced. Furthermore, ease of wearing is improved.

さらに具体的に効果を述べれば、
(1)外装シート全体が身体の立体形状に沿って密着するようになる。その結果、吸収性本体は身体に密着し、体液の漏れを効果的に防止できるようになるとともに、動きにも追従するため、装着感が良好となる。
(2)従来のように部分的に弾性部材を配置するパターンを採らず、全体に均一に多くの弾性部材を配置するようにしたため、弾性体１本当たりの伸縮力を小さく抑えることができ、従来の紙おむつよりも小さな力で伸ばし、はくことができる。また、未装着状態で外装シートが小さく縮こまることがないため、足が引っ掛かりにくくはきやすくなる。
(3)従来の紙おむつのように、ウエスト部や脚回りに締め付け力が集中しないため、圧迫感やゴムによる跡付きを解消することができる。 In more concrete terms,
(1) The entire exterior sheet comes into close contact with the three-dimensional shape of the body. As a result, the absorbent main body is in close contact with the body, and it is possible to effectively prevent leakage of bodily fluids.
(2) Since a pattern in which elastic members are partially arranged as in the past is not used, and a large number of elastic members are arranged uniformly on the whole, the stretching force per elastic body can be kept small, It can be stretched and peeled with less force than conventional disposable diapers. In addition, since the exterior sheet does not shrink in a non-mounted state, it is difficult to catch the foot.
(3) Unlike conventional paper diapers, the tightening force does not concentrate around the waist and legs, so it is possible to eliminate the feeling of pressure and the marks caused by rubber.

以下、本発明の実施の形態について図面を参照しながら詳述する。
〔第１形態例〕
図１は本発明に係るパンツ型使い捨て紙おむつ１の製品状態外観図であり、図２は展開状態での組み立て図、図３は外装シートの展開図である。
図１及び図２に示されるように、本パンツ型使い捨て紙おむつ１（以下、単に紙おむつという。）は、不織布などからなる透液性表面シート１１と、ポリエチレン等からなる防漏シート１２との間に、綿状パルプなどの吸収体１３を介在させた吸収性本体１０と、この吸収性本体１０の外面側に一体的設けられた外装シート２０とからなり、製品状態で前記外装シート２０の前身頃と後身頃とが両側部において接合されることによりウエスト開口部及び左右一対のレッグ開口部が形成された構造のパンツ型紙おむつである。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[First embodiment]
FIG. 1 is a product state appearance view of a pants-type disposable paper diaper 1 according to the present invention, FIG. 2 is an assembled view in a developed state, and FIG. 3 is a developed view of an exterior sheet.
As shown in FIGS. 1 and 2, the present pants-type disposable paper diaper 1 (hereinafter simply referred to as a paper diaper) is provided between a liquid-permeable surface sheet 11 made of nonwoven fabric and a leak-proof sheet 12 made of polyethylene or the like. The absorbent main body 10 interspersed with an absorbent body 13 such as cotton pulp, and the exterior sheet 20 provided integrally on the outer surface side of the absorbent main body 10, and the predecessor of the exterior sheet 20 in a product state A pants-type disposable diaper having a structure in which a waist opening and a pair of left and right leg openings are formed by joining a back and a back body on both sides.

以下、前記吸収性本体１０、外装シート２０、およびその組立構造の順で説明する。
（吸収性本体１０の構造）
先ず最初に、吸収性本体１０の構造の一例について図５及び図６に基づいて詳述する。 Hereinafter, the absorbent main body 10, the exterior sheet 20, and the assembly structure thereof will be described in this order.
(Structure of the absorbent main body 10)
First, an example of the structure of the absorbent main body 10 will be described in detail based on FIGS. 5 and 6.

吸収性本体１０は、前述したように、不織布などからなる透液性表面シート１１と、ポリエチレン等からなる防漏シート１２との間に、綿状パルプなどの吸収体１３を介在させた構造とされ、体液を吸収保持するものである。 As described above, the absorbent main body 10 has a structure in which an absorbent body 13 such as cotton-like pulp is interposed between a liquid-permeable surface sheet 11 made of a nonwoven fabric or the like and a leak-proof sheet 12 made of polyethylene or the like. And absorbs and retains body fluids.

前記吸収体１３は、図示例では平面形状を略方形状として成形されたものが使用され、その幅寸法は股間部への当たりによって着用者にゴワ付き感を与えない寸法幅となっている。この吸収体１３は、形状保持と透液性表面シート１１を透過した体液の拡散性向上のためにクレープ紙１４によって囲繞されている。なお、前記吸収体１３としては、嵩を小さくできるエアレイド吸収体を用いるのが望ましい。 In the illustrated example, the absorbent body 13 is formed with a substantially square shape in plan view, and the width dimension thereof is a dimension width that does not give the wearer a feeling of gore by hitting the crotch portion. The absorbent body 13 is surrounded by crepe paper 14 in order to maintain the shape and improve the diffusibility of the body fluid that has passed through the liquid-permeable surface sheet 11. As the absorber 13, it is desirable to use an airlaid absorber that can reduce the bulk.

前記吸収体１３の表面側（肌当接面側）を覆う透液性表面シート１１としては、有孔また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、ポリエチレンまた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。透液性表面シート１１に多数の透孔を形成した場合には、尿などが速やかに吸収されるようになり、ドライタッチ性に優れたものとなる。前記透液性表面シート１１は、吸収体１３の側縁部を巻き込んで吸収体１３の裏面側まで延在している。 As the liquid-permeable surface sheet 11 covering the surface side (skin contact surface side) of the absorbent body 13, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. The material fibers that make up the nonwoven fabric can be synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. When a large number of through holes are formed in the liquid-permeable surface sheet 11, urine and the like are quickly absorbed, and the dry touch property is excellent. The liquid-permeable top sheet 11 extends to the back side of the absorbent body 13 around the side edge of the absorbent body 13.

前記吸収体１３の裏面側（非肌当接面側）を覆う防漏シート１２は、ポリエチレンまたはポリプロピレンなどの不透液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、たと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、一軸また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り、仮にシート厚が同じであれば無孔シートよりも剛性が低下するため、柔軟性の点で勝るものとなる。 The leak-proof sheet 12 covering the back surface side (non-skin contact surface side) of the absorbent body 13 is made of a liquid-impervious plastic sheet such as polyethylene or polypropylene, but in recent years has moisture permeability from the viewpoint of preventing stuffiness. Those are preferably used. This water-impervious / breathable 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. If the sheet thickness is the same, the rigidity is lower than that of the non-porous sheet, which is superior in terms of flexibility.

一方、立体ギャザーＢＳを形成するギャザー不織布１５は、図６に示されるように、折返しによって二重シートとした不織布が用いられ、前記透液性表面シート１１によって巻き込まれた吸収体１３の側縁部をさらにその上側から巻き込んで吸収体１３の裏面側まで延在して接着されている。より具体的には、前記ギャザー不織布１５は、紙おむつの長手方向中間部では、立体ギャザーＢＳ形成部分を残し、幅方向中間部から吸収体１３の裏面側に亘る範囲がホットメルト接着剤等によって接着され、また長手方向前後端部では、前記幅方向中間部から一方側端縁までの区間が吸収体１３の裏面側に亘る範囲で接着されるとともに、前記立体ギャザーＢＳを形成する部分を吸収体１３の上面部にて折り畳むようにしながらホットメルト接着剤等により接着している。 On the other hand, as shown in FIG. 6, the gathered nonwoven fabric 15 that forms the three-dimensional gathered BS is a nonwoven fabric made into a double sheet by folding, and the side edge of the absorbent body 13 that is wound by the liquid-permeable surface sheet 11. The part is further wound up from the upper side and extends to the back surface side of the absorbent body 13 to be bonded. More specifically, the gathered nonwoven fabric 15 has a three-dimensional gather BS forming portion at the middle portion in the longitudinal direction of the paper diaper, and a range from the middle portion in the width direction to the back side of the absorbent body 13 is bonded by a hot melt adhesive or the like. Further, at the front and rear end portions in the longitudinal direction, the section from the intermediate portion in the width direction to the one side end edge is bonded in a range extending to the back surface side of the absorber 13, and the portion forming the three-dimensional gather BS is the absorber. While being folded at the upper surface portion of 13, it is bonded by a hot melt adhesive or the like.

前記二重シート不織布によって形成されたギャザー不織布１５の内部には、起立先端側部分に複数本の糸状弾性伸縮部材１６、１６…が配設されている。前記糸状弾性伸縮部材１６、１６…は、製品状態において図６(B)に示されるように、弾性伸縮力により吸収体側縁部より突出する不織布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。 In the gathered nonwoven fabric 15 formed of the double sheet nonwoven fabric, a plurality of thread-like elastic elastic members 16, 16... As shown in FIG. 6 (B), the thread-like elastic stretch members 16, 16... Are used to form a three-dimensional gather BS by raising the nonwoven fabric portion protruding from the absorber side edge by elastic stretch force. Is.

前記防漏シート１２は、前記二重シート状のギャザー不織布１５の内部まで進入し、図６に示されるように、立体ギャザーＢＳの下端側において防漏壁を構成するようになっている。かかる防漏シート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 leak-proof sheet 12 enters into the double sheet-like gathered nonwoven fabric 15 and constitutes a leak-proof wall on the lower end side of the three-dimensional gather BS as shown in FIG. As the leak-proof sheet 12, it is desirable to use an opaque sheet so as not to cause browning such as defecation and urine. 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.

前記糸状弾性伸縮部材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、糸状弾性伸縮部材に代えて、ある程度の幅を有するテープ状弾性伸縮部材を用いるようにしてもよい。 As the thread-like elastic stretchable member 16, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, and the like 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. Instead of the thread-like elastic elastic member, a tape-like elastic elastic member having a certain width may be used.

前述のギャザー不織布１５を構成する素材繊維も前記透液性表面シート１１と同様に、ポリエチレンまた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。さらに前記ギャザー不織布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 surface sheet 11, the material fiber constituting the gathered nonwoven fabric 15 is not only synthetic fibers such as polyethylene or polypropylene, but also synthetic fibers such as polyester and amide, as well as recycled fibers such as rayon and cupra, 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 non-woven fabric with a low basis weight and excellent air permeability. Further, with respect to the gathered nonwoven fabric 15, in order to prevent the transmission of urine and the like, to prevent fogging and to improve the feel to the skin (dry feeling), a silicon-based, paraffin-metal-based, alkylchromic chromoid-based water repellent It is desirable to use a water-repellent non-woven fabric coated with such as.

（外装シート２０の構造）
外装シート２０は、図２及び図３に示されるように、上層不織布２０Ａ及び下層不織布２０Ｂからなる２層構造の不織布シートとされ、前記上層不織布２０Ａと下層不織布２０Ｂとの間に各種弾性部材が配設され、伸縮性が付与されている。平面形状は、中間両側部に夫々脚部開口を形成するために形成された凹状の脚回りカットライン２９により、全体として擬似砂時計形状を成している。 (Structure of exterior sheet 20)
As shown in FIGS. 2 and 3, the exterior sheet 20 is a non-woven sheet having a two-layer structure including an upper layer nonwoven fabric 20A and a lower layer nonwoven fabric 20B, and various elastic members are provided between the upper layer nonwoven fabric 20A and the lower layer nonwoven fabric 20B. Arranged and stretchable. The planar shape forms a pseudo hourglass shape as a whole by the concave leg-around cut lines 29 formed to form leg openings on both sides of the middle.

本発明に係る外装シート２０においては、前記弾性部材として、図３に示される展開形状において、前記ウエスト開口部回り２３に配置されたウエスト部弾性部材２４，２４…と、前身頃Ｆ及び後身頃Ｂに、上下方向に間隔をおいて水平方向に沿って配置された複数の腰回り弾性部材群２５，２５…とを有するとともに、前身頃Ｆ及び後身頃Ｂのそれぞれにおいて、前記腰回り弾性部材群２５，２５…とは別に、前身頃Ｆと後身頃Ｂとを接合する一方側接合縁から股下側に延び、股下側を迂回して前身頃と後身頃との他方側接合縁に到達するとともに、互いに交差することなく間隔をおいて配置された複数本の湾曲弾性部材群２６…、２８…を備えるものである。なお、本外装シート２０では、前記脚回りカットライン２９に沿って実質的に連続する、所謂脚回り弾性部材は設けられていない。
以下、前記各種弾性部材毎に詳述する。 In the exterior sheet 20 according to the present invention, as the elastic member, in the developed shape shown in FIG. 3, waist elastic members 24, 24... Arranged around the waist opening 23, the front body F and the back body B includes a plurality of waist elastic member groups 25, 25,... Arranged in the horizontal direction at intervals in the vertical direction, and the waist elastic members in the front body F and the back body B, respectively. Apart from the groups 25, 25 ..., the front body F and the back body B are joined from the one side joint edge joining the crotch side, bypassing the crotch side and reaching the other side joint edge of the front body and the back body. In addition, a plurality of curved elastic member groups 26, 28,... Arranged at intervals without crossing each other are provided. In addition, in this exterior sheet 20, what is called a leg periphery elastic member substantially continuous along the said leg periphery cut line 29 is not provided.
Hereinafter, the various elastic members will be described in detail.

前記ウエスト部弾性部材２４，２４…は、前身頃Ｆと後身頃Ｂとが接合された脇部接合縁２１、２２の範囲の内、ウエスト開口縁近傍に上下方向に間隔をおいて配設された複数条の糸ゴム状弾性部材であり、身体のウエスト部回りを締め付けるように伸縮力を与えることにより紙おむつを身体に装着するためのものである。このウエスト部弾性部材２４は、図示例では糸ゴムを用いたが、例えばテープ状の伸縮部材を用いてもよい。 The waist elastic members 24, 24... Are arranged in the vicinity of the waist opening edge in the range of the side joint edges 21, 22 where the front body F and the back body B are joined, with an interval in the vertical direction. A plurality of thread rubber-like elastic members for attaching a disposable diaper to the body by applying an expansion / contraction force so as to tighten around the waist of the body. For the waist elastic member 24, rubber thread is used in the illustrated example. However, for example, a tape-like elastic member may be used.

前記腰回り弾性部材群２５，２５…は、脇部接合縁２１、２２の内、概ね上部から下部までの範囲に亘り、上下方向に間隔をおいて水平方向に沿って配設された糸ゴム状の弾性部材であり、前身頃Ｆ及び後身頃Ｂの腰回り部分に夫々水平方向の伸縮力を与え、紙おむつを身体に密着させるためのものである。なお、前記ウエスト部弾性部材２４、２４…と腰回り弾性部材群２５、２５…との境界は必ずしも明確でなくてよい。例えば、前身頃Ｆ及び後身頃Ｂに上下方向に間隔をおいて水平方向に配置された弾性部材の内、数は特定できなくても、上部側の何本かがウエスト部弾性部材として機能し、残りの弾性部材が腰回り弾性部材として機能していればよい。 The waist elastic members 25, 25... Are thread rubbers arranged in the horizontal direction at intervals in the vertical direction over the range from the upper part to the lower part of the side joint edges 21, 22. It is an elastic member, and is used to apply a stretching force in the horizontal direction to the waist portions of the front body F and the back body B, respectively, so that the disposable diaper is in close contact with the body. The boundary between the waist elastic members 24, 24 ... and the waist elastic members 25, 25 ... is not necessarily clear. For example, among the elastic members arranged in the horizontal direction with an interval in the vertical direction on the front body F and the back body B, even if the number cannot be specified, some on the upper side function as waist elastic members. The remaining elastic members only have to function as waist elastic members.

前記後身頃Ｂにおいて、前記腰回り弾性部材群２５，２５…とは別に配設された背側湾曲弾性部材群２６、２６…は、一方側の脇部接合縁２２からほぼ脚回りカットライン２９に沿うように股下部に延び、股下部を迂回して反対側の脚回りカットライン２９にほぼ沿いながら他方側の脇部接合縁２２に到達するように配置された複数本、図示例では９本の糸ゴム状弾性部材であり、これら背側湾曲弾性部材群２６、２６…は互いに交差することなく、間隔をおいて配置されている。この背側湾曲弾性部材群２６、２６…は、従来の脚回り弾性部材とは配置態様が異なるものである。すなわち、２，３本程度の弾性伸縮部材を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所定の間隔を空けて、５本以上、好ましくは７本以上配置される。 In the rear body B, the dorsal curved elastic member groups 26, 26,... Arranged separately from the waist elastic member groups 25, 25,. Extending to the crotch part along the crotch part, bypassing the crotch part, being substantially along the opposite leg leg cut line 29 and being arranged so as to reach the other side side joint edge 22, 9 in the illustrated example These back rubber elastic members 26, 26,... Are arranged at intervals without crossing each other. The dorsal curved elastic member groups 26, 26,... Are different in arrangement from the conventional leg-hole elastic members. That is, about two or three elastic expansion and contraction members are not arranged substantially as a bundle with a close interval, but at a predetermined interval so as to form a predetermined expansion and contraction zone, five or more, Preferably seven or more are arranged.

前記背側湾曲弾性部材群２６，２６…の始終端は、前身頃Ｆと後身頃Ｂとの接合縁のほぼ上部から下部の範囲に亘り所定の間隔で接続され、前記吸収性本体１０の側縁との交差部において、前記背側湾曲弾性部材群２６，２６…と吸収性本体１０側縁との鋭角側交差角αは３５°以上、好ましくは４０°以上、より好ましくは４５°以上となる配置パターンで配置されている。因みに図示例では、交差角αが４７°前後となるように配置されている。前記交差角αは、水平方向分力と鉛直方向分力のバランスから、大きくとも６０°以下とするのが望ましい。 The starting and terminating ends of the dorsal curved elastic member groups 26, 26... Are connected at a predetermined interval from the upper part to the lower part of the joining edge of the front body F and the rear body B, At the intersection with the edge, the acute angle intersection angle α between the dorsal curved elastic member group 26, 26... And the absorbent main body 10 side edge is 35 ° or more, preferably 40 ° or more, more preferably 45 ° or more. Are arranged in an arrangement pattern. Incidentally, in the example of illustration, it arrange | positions so that the crossing angle (alpha) may be around 47 degrees. The crossing angle α is preferably 60 ° or less at most from the balance between the horizontal component force and the vertical component force.

前記前身頃Ｆと後身頃Ｂとの脇部接合縁２１，２２において、前記背側湾曲弾性部材群２６、２６…の内、最もウエスト開口部寄りに位置する弾性部材２６_ｉは、ウエスト部弾性部材２４，２４…の最下側弾性部材２４_Ｏからの距離Ｓ_Ｂが２０mm以内となるように配置される。装着に際して着用者がウエスト部の脇を掴んで上方に引き上げた際、前記湾曲弾性部材２６、２６…の弾性力によって紙おむつの後身頃Ｂ側を上方に引上げ易くなり、穿き易さが向上するようになる。 In the side joint edges 21 and 22 of the front body F and the back body B, the elastic member 26 _i located closest to the waist opening in the dorsal curved elastic member groups 26, 26. members 24, 24 ... distance _{S B} from the lowermost elastic member 24 _O in is arranged to be within 20 mm. When the wearer grasps the side of the waist part and pulls it upward when wearing it, the elastic force of the curved elastic members 26, 26... Makes it easier to pull the rear body B side of the paper diaper upward, so that ease of wearing is improved. become.

また、前記背側湾曲弾性部材群２６，２６…は、股下部の迂回部において、弧状曲線状に方向転換されていることが望ましい。弾性部材では接線方向に伸縮力が作用するところ、股下部において曲線状に反転させることにより、吸収体１３の幅方向に作用する力を極小化でき、該股下部での吸収体１３の縮こまりを防止することが可能となる。 In addition, it is desirable that the dorsal curved elastic member groups 26, 26,... In the elastic member, when the elastic force acts in the tangential direction, the force acting in the width direction of the absorber 13 can be minimized by reversing the curved shape in the crotch part, and the shrinkage of the absorber 13 in the crotch part can be reduced. It becomes possible to prevent.

本紙おむつ１では、後身頃Ｂにおいて、臀部の膨らみ形状に対応して外装シート２０をフィットさせるために、臀部の膨らみに対し極力沿う方向に伸縮力を作用させるべく、相対的に緩い傾斜角度で弾性部材群２６，２６…を配置するようにしたものであり、図示例のように、交差角α＝４７°で伸縮部材２６、２６…が配置されているとすると、与えた伸縮力の７３％を水平方向分力として作用させることができるようになり、臀部を包み込むように外装シート２０を身体に密着させることができるようになる。その結果、吸収性本体１０を中央側に縮こまらせることがなくなるとともに、確実に身体に密着させることにより漏れ防止効果が高まるようになる。 In the present diaper 1, in the back body B, in order to fit the exterior sheet 20 corresponding to the bulge shape of the buttock, the stretch force is applied in a direction along the bulge of the buttock as much as possible at a relatively gentle inclination angle. The elastic member groups 26, 26... Are arranged. As shown in the illustrated example, if the expansion members 26, 26,... % Can be allowed to act as a horizontal component force, and the exterior sheet 20 can be brought into close contact with the body so as to wrap the buttocks. As a result, the absorptive main body 10 is not contracted to the center side, and the leak prevention effect is enhanced by securely contacting the absorbent body 10 with the body.

さらに、前記前身頃Ｆと後身頃Ｂとの脇部接合縁２１，２２における背側湾曲弾性部材群２６，２６…の配置間隔、すなわち脇部側縁２１，２２の弾性部材配置区間ＢＬにおける配置間隔は、股下部の弾性部材配置区間ＭＢにおける前記背側湾曲弾性部材群２６，２６…の配置間隔とほぼ同じとされ、かつ背側湾曲弾性部材群２６，２６…の内、最も股下側に位置する弾性部材２６_Ｏはおむつの股下部折り畳みラインＣＬからの距離ＢＨが±５０mm以内、好ましくは３５mm以内となる曲線形状を描くように配置されている。背側湾曲弾性部材群２６，２６…の配置間隔を脇部接合縁２１，２２と股下部とで均等配置にすることにより、弾性力が集中せずに均等バランスで外装シート２０全体を身体に密着させるようになるとともに、前記背側湾曲弾性部材群２６，２６…が描くラインが股下部近傍領域を迂回する大波の曲線形状で配置することにより、外装シート２０を身体に対してきっちりと密着保持し得るようになる。なお、背側湾曲弾性部材群２６，２６…の配置間隔を脇部接合縁２１，２２と股下部とで均等配置とする方法については後述の外装シート２０の製造方法で詳述する。 Furthermore, the arrangement | positioning space | interval of the back side curved elastic member group 26,26 ... in the side part joining edge 21,22 of the said front body F and the back body B, ie, arrangement | positioning in the elastic member arrangement | positioning area BL of the side part side edge 21,22. The interval is substantially the same as the arrangement interval of the dorsal curved elastic member groups 26, 26... In the elastic member arrangement section MB at the crotch portion, and is the most crotch side among the dorsal curved elastic member groups 26, 26. The elastic member 26 _O located is arranged so as to draw a curved shape in which the distance BH from the crotch lower fold line CL of the diaper is within ± 50 mm, preferably within 35 mm. The spacing between the dorsal curved elastic member groups 26, 26... Is evenly arranged between the side joint edges 21, 22 and the crotch part, so that the entire exterior sheet 20 can be applied to the body with equal balance without concentration of elastic force. When the lines drawn by the dorsal curved elastic member groups 26, 26,... Are arranged in a large-wave curve shape that bypasses the region near the crotch, the exterior sheet 20 is tightly adhered to the body. It will be able to hold. In addition, the method of making the arrangement | positioning space | interval of the back | dorsal bending elastic member group 26, 26 ... evenly by the side part joining edges 21 and 22 and the crotch part is explained in full detail by the manufacturing method of the exterior sheet 20 mentioned later.

前記後身頃Ｂ側に配置された背側湾曲弾性部材群２６，２６…は、股下部において、おむつの股下部折り畳みラインＣＬを基準に前身頃Ｆ側に偏倚していることが望ましい。股下部において、背側湾曲弾性部材群２６，２６…をおむつの股下部折り畳みラインＣＬを基準に前身頃Ｆ側に偏倚させることにより、臀部側で生じるおむつのずり落ちを無くすとともに、外装シート２０の弛みを無くして身体にフィットさせることができる。 The dorsal curved elastic member groups 26, 26,... Arranged on the back body B side are preferably biased toward the front body F side at the crotch part with reference to the crotch folding line CL of the diaper. In the crotch part, the back-side curved elastic member groups 26, 26... Are biased toward the front body F side with respect to the crotch part folding line CL of the diaper, thereby eliminating the diaper slipping that occurs on the buttocks side and the exterior sheet 20. It can be made to fit the body without sag.

他方、前記外装シート２０の前身頃において、前記腰回り弾性部材群２５，２５…とは別に配設された腹側湾曲弾性部材群２８，２８…も、一方側の脇部接合縁２１から股下側に延び、股下側を迂回して他方側の脇部接合縁２１に到達するとともに、交差することなく間隔をおいて配置された複数本の、図示例では９本の糸状弾性部材であり、これら腹側湾曲弾性部材群２８，２８…は、互いに交差することなく、間隔をおいて配置されている。この腹側湾曲弾性部材群２８、２８…も、従来の脚回り弾性部材とは配置態様が異なるものである。すなわち、２，３本程度の弾性伸縮部材を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所定の間隔を空けて、５本以上、好ましくは７本以上配置される。 On the other hand, in the front body of the exterior sheet 20, the abdomen curved elastic member groups 28, 28... Arranged separately from the waist elastic member groups 25, 25. A plurality of, in the illustrated example, nine thread-like elastic members that extend to the side, bypass the crotch side, reach the other side side joining edge 21, and are arranged at intervals without intersecting, These ventral curved elastic member groups 28, 28... Are arranged at intervals without crossing each other. The ventral curved elastic member groups 28, 28... Are also different in arrangement from the conventional leg-hole elastic members. That is, about two or three elastic expansion and contraction members are not arranged substantially as a bundle with a close interval, but at a predetermined interval so as to form a predetermined expansion and contraction zone, five or more, Preferably seven or more are arranged.

この腹側弾性部材群２８，２８…の始終端も、前身頃Ｆと後身頃Ｂとの脇部接合縁２１，２１のほぼ上部から下部の範囲に亘り、所定の間隔で接続され、前記吸収性本体１０の側縁との交差部において、前記腹側湾曲弾性部材群２８，２８…と吸収性本体１０側縁との鋭角側交差角θが３０°以下、好ましくは２８°以下となる配置パターンで配置されている。因みに、図示例では交差角θが２６°前後となるように配置されている。前記交差角θは、水平方向分力と鉛直方向分力のバランスから、少なくとも２０°以上とするのが望ましい。 The start and end of the ventral elastic member groups 28, 28... Are also connected at a predetermined interval from the upper part to the lower part of the side joint edges 21 and 21 of the front body F and the back body B, and the absorption. At the intersection with the side edge of the absorbent main body 10, the acute angle side crossing angle θ between the ventral curved elastic member groups 28, 28... And the side edge of the absorbent main body 10 is 30 ° or less, preferably 28 ° or less. Arranged in a pattern. Incidentally, in the example of illustration, it arrange | positions so that crossing angle (theta) may be around 26 degrees. The crossing angle θ is preferably at least 20 ° or more from the balance of the horizontal component force and the vertical component force.

この腹側湾曲弾性部材群２８，２８…についても、吸収体１３の幅方向に作用する力を極小化し、該股下部での吸収体１３の縮こまりを防止するために、股下部の迂回部において、ほぼ弧状曲線状に方向転換されていることが望ましい。 In the ventral curved elastic member groups 28, 28..., In order to minimize the force acting in the width direction of the absorbent body 13 and prevent the absorbent body 13 from contracting at the crotch part, It is desirable that the direction is changed to a substantially arcuate curve.

本紙おむつ１においては、身体の前側部分には身体の後側臀部のような引掛かりとなる膨らみがないため、紙おむつのずり落ちは主として前身頃側Ｆで顕著に発生する傾向にあるとの知見に鑑み、相対的にきつい傾斜角度で弾性部材群２８，２８…を配置するようにしたものであり、図示例のように、交差角θ＝２６°で伸縮部材２８、２８…が配置されているとすると、与えた伸縮力の９０％を上方向分力として作用させることができ、紙おむつのずり落ちを効果的に防止できるようになる。 In the present paper diaper 1, since the front part of the body does not have a bulge that becomes a catch like the back buttock of the body, it is found that the slippage of the paper diaper tends to occur mainly on the front body side F In view of the above, the elastic member groups 28, 28,... Are arranged at a relatively tight inclination angle, and the expansion members 28, 28,. If so, 90% of the applied stretching force can be applied as an upward component force, and slipping of the paper diaper can be effectively prevented.

前記前身頃Ｆと後身頃Ｂとの脇部接合縁２１，２２において、前記腹側湾曲弾性部材群２８，２８…の内、最もウエスト開口部寄りに位置する弾性部材２８_ｉは、ウエスト部弾性部材の最下側弾性部材２４_Ｏからの距離Ｓ_Ｆが２０mm以内となるように配置される。装着に際して着用者がウエスト部の脇をもって上方に引き上げた際、前記腹側湾曲弾性部材２８、２８…の弾性力によって紙おむつの前身頃Ｆ側を上方に引上げ易くなり、穿き易さが向上するようになる。 In the side joint edges 21 and 22 of the front body F and the back body B, the elastic member 28 _i located closest to the waist opening in the ventral curved elastic member groups 28, 28. distance S _F from the lowermost elastic member 24 _O member is arranged to be within 20 mm. When the wearer pulls up with the side of the waist when wearing, the front body F side of the disposable diaper is easily lifted upward by the elastic force of the abdomen curved elastic members 28, 28. become.

さらに、前記前身頃Ｆと後身頃Ｂとの脇部接合縁２１，２２における腹側湾曲弾性部材群２８，２８…の配置間隔、すなわち脇部側縁２１，２２の弾性部材配置区間ＦＬにおける配置間隔は、股下部の弾性部材配置区間ＭＦにおける前記腹側湾曲弾性部材群２８，２８…の配置間隔とほぼ同じとされ、かつ腹側湾曲弾性部材群２８，２８…の内、最も股下側に位置する弾性部材２８_Ｏはおむつの股下部折り畳みラインＣＬからの距離ＦＨが±５０mm以内、好ましくは３５mm以内となる曲線形状を描くように配置されている。腹側湾曲弾性部材群２８，２８…の配置間隔を脇部接合縁２１，２２と股下部とで均等配置にすることにより、弾性力が集中せずに均等バランスで外装シート２０を身体に密着させるようになるとともに、前記腹側湾曲弾性部材群２８，２８…が描くラインが股下部近傍領域を迂回する大波の曲線形状で配置することにより、外装シート２０を身体に対してきっちりと密着保持し得るようになる。なお、腹側湾曲弾性部材群２８，２８…の配置間隔を脇部接合縁２１，２２と股下部とで均等配置とする方法については後述の外装シート２０の製造方法で詳述する。 Furthermore, the arrangement | positioning space | interval of the ventral | curvature curved elastic member group 28,28 ... in the side part joining edge 21,22 of the said front body F and the back body B, ie, arrangement | positioning in the elastic member arrangement | positioning area FL of the side part side edge 21,22. The interval is substantially the same as the arrangement interval of the ventral curved elastic member groups 28, 28... In the elastic member arrangement section MF at the crotch portion, and the furthest crotch side among the ventral curved elastic member groups 28, 28. The positioned elastic member 28 _O is arranged so as to draw a curved shape in which the distance FH from the crotch fold line CL of the diaper is within ± 50 mm, preferably within 35 mm. By arranging the intervals between the ventral curved elastic member groups 28, 28... At the side joint edges 21 and 22 and the crotch part, the outer sheet 20 is closely attached to the body in an even balance without the elastic force being concentrated. The line drawn by the ventral curved elastic member groups 28, 28,... Is arranged in a large-wave curve shape that bypasses the region near the crotch, thereby holding the exterior sheet 20 tightly in contact with the body. You can get it. In addition, it explains in full detail in the manufacturing method of the below-mentioned exterior sheet | seat 20 about the arrangement | positioning space | interval of the ventral | curvature bending elastic member group 28,28 ... evenly arranged by the side part joining edges 21 and 22 and the crotch part.

ところで、前記前身頃側Ｆに配置された腹側湾曲弾性部材群２８，２８…の内の最股下側弾性部材２８_Ｏと、前記後身頃側Ｂに配置された背側湾曲弾性部材群２６，２６…の内の最股下側弾性部材２６_Ｏとは、股下部において互いに交差することなく近接していることが望ましい。近接幅（ＦＨ−ＢＨ）は、１０〜２０mmとするのが望ましい。股下部において、前記湾曲弾性部材群２８…、２６…によって吸収性本体１０を均等の圧力で身体側に押付け密着させるため、身体との隙間が封鎖され、高い漏れ防止効果が発揮されるようになる。 By the way, the innermost crotch elastic member 28 _O among the ventral curved elastic member groups 28, 28... Arranged on the front body side F, and the dorsal curved elastic member group 26 arranged on the rear body side B. 26... Of the most crotch lower elastic member 26 _O in the crotch portion is preferably close to each other without crossing each other. The proximity width (FH-BH) is desirably 10 to 20 mm. In the crotch part, the absorbent main body 10 is pressed and adhered to the body side with equal pressure by the curved elastic member groups 28, 26, so that the gap with the body is sealed and a high leakage prevention effect is exhibited. Become.

ところで、上記形態例では、前身頃Ｆ及び後身頃Ｂに配置された腰回り弾性部材群２５，２５…及び湾曲弾性部材２６…、２８…は、吸収性本体１０上においても連続させて配置するようにしたが、図４に示されるように、吸収性本体１０を横切る弾性部材を切断し、不連続としてもよい。弾性部材を吸収性本体上で不連続とすることにより、吸収体１３の縮こまりをより防止することができる。なお、前記吸収性本体１０上で弾性部材が切断されているか否かに拘わらず、腰回り弾性部材群２５，２５…及び湾曲弾性部材２６…、２８…が切断前の状態で本発明の規定に従って配置されている限り、上位の権利範囲内に包含されるものである。 By the way, in the said form example, waist elastic member group 25,25 ... and curved elastic member 26 ..., 28 ... which are arrange | positioned at the front body F and the back body B are arrange | positioned continuously also on the absorptive main body 10. FIG. However, as shown in FIG. 4, the elastic member that crosses the absorbent main body 10 may be cut to be discontinuous. By making the elastic member discontinuous on the absorbent main body, the absorber 13 can be further prevented from being contracted. Regardless of whether or not the elastic member is cut on the absorbent main body 10, the waist elastic member groups 25, 25... And the curved elastic members 26. As long as they are arranged according to the above.

（外装シート２０の製造方法）
次に、前記外装シート２０の製造方法について詳述する。
前記外装シート２０の製造は、図７に示されるように、ニップローラ部３０の上側に上層不織布２０Ａが供給されるとともに、下側に下層不織布２０Ｂが供給され、かつこれら上層不織布２０Ａと下層不織布２０Ｂとの間に、各種弾性部材（ウエスト部弾性部材２４、腰回り弾性部材２５、背側湾曲弾性部材２６，腹側弾性部材２８）が供給され、外装シート２０が連続的に組み立てられる。 (Method for manufacturing exterior sheet 20)
Next, the manufacturing method of the exterior sheet 20 will be described in detail.
As shown in FIG. 7, the outer sheet 20 is manufactured by supplying the upper layer nonwoven fabric 20 </ b> A to the upper side of the nip roller portion 30 and the lower layer nonwoven fabric 20 </ b> B to the lower side, and the upper layer nonwoven fabric 20 </ b> A and the lower layer nonwoven fabric 20 </ b> B. Are supplied with various elastic members (waist elastic member 24, waist elastic member 25, dorsal curved elastic member 26, ventral elastic member 28), and the exterior sheet 20 is continuously assembled.

ここで、前記ウエスト部弾性部材２４、２４…及び腰回り弾性部材２５、２５…はライン方向に沿って直線的に導入されるのに対して、前記湾曲弾性部材２６…、２８…は、公知のトラバース装置３２による曲線状に蛇行させながらニップローラー部３０に導入される。前記トラバース装置３２は、先端部分の弾性伸縮部材２６…、２８…の保持部を有し、連続ウエブ（シート２０Ａ、２０Ｂ）の幅方向への進退を計算された速度で行わしめることにより、弾性伸縮部材２６…、２８…を所定の湾曲形状に配置するようにしたものである。従って、前記湾曲弾性部材２６，２８の配置間隔は、脇部接合縁２１，２２と股下部とでおのずと均等配置とすることができる。
前記ウエスト部弾性部材２４及び腰回り弾性部材２５のシートへの固着は、周面塗布装置３１により前記弾性部材２４…、２５…の周面にホットメルト接着剤が塗布され、ニップローラ部３０に供給される。 Here, the waist elastic members 24, 24... And the waist elastic members 25, 25... Are linearly introduced along the line direction, whereas the curved elastic members 26. It is introduced into the nip roller section 30 while meandering in a curved shape by the traverse device 32. The traverse device 32 has a holding portion of elastic elastic members 26, 28,... At the front end portion, and elastically moves the continuous web (sheets 20A, 20B) in the width direction at a calculated speed. The elastic members 26, 28, ... are arranged in a predetermined curved shape. Therefore, the arrangement | positioning space | interval of the said curved elastic members 26 and 28 can be made into equal arrangement | positioning naturally by the side part joining edges 21 and 22 and the crotch part.
The waist elastic member 24 and the waist elastic member 25 are fixed to the sheet by applying a hot melt adhesive to the peripheral surfaces of the elastic members 24, 25. The

一方、前身頃の腰回り弾性伸縮部材２５、２５…と後身頃腰回り弾性伸縮部材２５，２５…との間の中間ゾーンＭについては、前記上層不織布２０Ａ、下層不織布２０Ｂの内の少なくとも一方側、図示例では下層側不織布２０Ｂに対して、上下方向に間隔をおき水平方向に沿って複数条の列を成すようにコーター３３によってビード塗布され、前記湾曲弾性伸縮部材２６…、２８…は前記中間ゾーンＭにおいて、下層不織布２０Ｂに塗布されたホットメルト接着剤によって固着される。
前記湾曲弾性部材２６…、２８…を吸収性本体１０上で切断し不連続化するには、特開2002-35029号公報、特開2002-178428号公報及び特開2002-273808号公報に記載される切断方法が好適に採用される。同公報に記載される弾性伸縮部材の切断方法は、基本的には図７に示されるように、前記外装シート２０となる積層シート２０’を製造した後、表面に凸部を複数個配列したエンボスヒートロール３４と、このエンボスヒートロール３４と対向する対向ロール３５との間に前記積層シート２０’を通過させ、この積層シート２０’の湾曲弾性部材２６…、２８…を前記エンボスヒートロール３４の凸部および対向ロール３５間での加圧および加熱の内の少なくとも一方により切断するものである。なお、図７(B)中のＸ領域が切断範囲を示している。 On the other hand, with respect to the intermediate zone M between the waist elastic elastic members 25, 25 ... of the front body and the waist elastic elastic members 25, 25 ... of the back body, at least one side of the upper nonwoven fabric 20A and the lower nonwoven fabric 20B. In the illustrated example, the lower-layer nonwoven fabric 20B is bead-coated by the coater 33 so as to form a plurality of rows along the horizontal direction at intervals in the vertical direction, and the curved elastic elastic members 26, 28,. In the intermediate zone M, it is fixed by a hot melt adhesive applied to the lower layer nonwoven fabric 20B.
In order to cut the curved elastic members 26, 28, ... on the absorbent main body 10 and make them discontinuous, it is described in JP 2002-35029, JP 2002-178428, and JP 2002-273808. The cutting method to be used is preferably employed. The elastic stretchable member cutting method described in the publication basically has a plurality of convex portions arranged on the surface after manufacturing a laminated sheet 20 ′ to be the exterior sheet 20, as shown in FIG. The laminated sheet 20 ′ is passed between an embossed heat roll 34 and a counter roll 35 facing the embossed heat roll 34, and the curved elastic members 26, 28,. It cut | disconnects by at least one of the pressurization between the convex part and the opposing roll 35, and a heating. Note that the X region in FIG. 7B indicates the cutting range.

（紙おむつの組立）
前記吸収性本体１０と外装シート２０とは、図２に示されるように、外装シート２０の上面側に吸収性本体１０がホットメルト等の接着剤によって接着され一体化される。そして、吸収性本体１０および外装シート２０が前後方向に折り重ねられ、その両側部が相互に熱溶着またはホットメルト接着剤などによって接合されることによりパンツ型紙おむつに組み立てられる。 (Assembling paper diapers)
As shown in FIG. 2, the absorbent main body 10 and the exterior sheet 20 are integrally bonded to the upper surface side of the exterior sheet 20 by an adhesive such as hot melt. And the absorptive main body 10 and the exterior sheet | seat 20 are folded up in the front-back direction, and the both sides are mutually assembled by heat welding or a hot-melt-adhesive etc., and it assembles into a pants-type paper diaper.

〔その他の形態例〕
(1)上記形態例では、前記前身頃側Ｆに配置された腹側湾曲弾性部材群２８，２８…の内の最股下側弾性部材２８_Ｏと、前記後身頃側Ｂに配置された背側湾曲弾性部材群２６，２６…の内の最股下側弾性部材２６_Ｏとが、股下部において互いに交差することなく近接させるようにしたが、前記腹側湾曲弾性部材群２８，２８…の一部と、前記背側湾曲弾性部材群２６，２６…の一部とが交差していてもよい。 [Other examples]
(1) In the above embodiment, the most crotch elastic member 28 _O in the abdomen curved elastic member group 28, 28... Arranged on the front body side F and the back side arranged on the back body side B. In the curved elastic member groups 26, 26..., The most crotch lower elastic member 26 _O is brought close to each other without intersecting each other in the crotch portion, but a part of the ventral curved elastic member groups 28, 28. And a part of the dorsal curved elastic member groups 26, 26,...

本発明に係るパンツ型使い捨て紙おむつ１の製品状態外観図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a product state external view of the underpants type disposable paper diaper 1 which concerns on this invention. 展開状態での組み立て図である。It is an assembly drawing in the unfolded state. 外装シート２０の展開図である。FIG. 3 is a development view of the exterior sheet 20. 外装シート２０の変形例を示す展開図である。FIG. 6 is a development view illustrating a modified example of the exterior sheet 20. 吸収性本体１０の平面図である。2 is a plan view of the absorbent main body 10. FIG. (A)は吸収性本体１０の展開状態での半横断面図、(B)はその製品状態を示す図である。(A) is a half cross-sectional view of the absorbent main body 10 in a developed state, and (B) is a diagram showing the product state. 外装２０の組立て要領を示す、(A)は模式図、(B)は要部平面図である。The assembly procedure of the exterior 20 is shown, (A) is a schematic diagram, and (B) is a plan view of the main part. 従来のパンツ型使い捨て紙おむつ（その１）を示す、(A)は展開図、(B)は製品状態図である。The conventional pants type disposable paper diaper (the 1) is shown, (A) is a development view, (B) is a product state diagram. 従来のパンツ型使い捨て紙おむつ（その２）を示す正面図である。It is a front view which shows the conventional pants-type disposable paper diaper (the 2). 従来のパンツ型使い捨て紙おむつ（その３）を示す展開図である。It is an expanded view which shows the conventional pants type disposable paper diaper (the 3). 従来のパンツ型使い捨て紙おむつ（その４）を示す展開図である。It is an expanded view which shows the conventional pants type disposable paper diaper (the 4). 従来のパンツ型使い捨て紙おむつ（その５）を示す、(A)は正面図、(B)は展開図である。The conventional pants type disposable paper diaper (the 5) is shown, (A) is a front view, (B) is an expanded view.

１…紙おむつ、１０…吸収性本体、１１…透液性表面シート、１２…防漏シート、１３…吸収体、１４…クレープ紙、１５…ギャザー不織布、１６…糸状弾性伸縮部材、２０…外装シート、２１・２２…脇部接合縁、２４…ウエスト部弾性部材、２５…腰回り弾性部材、２６…背側湾曲弾性部材、２８…腹側湾曲弾性部材、２９…脚回りカットライン、Ｆ…前身頃、Ｂ…後身頃 DESCRIPTION OF SYMBOLS 1 ... Paper diaper, 10 ... Absorbent main body, 11 ... Liquid-permeable surface sheet, 12 ... Leak-proof sheet, 13 ... Absorber, 14 ... Crepe paper, 15 ... Gathered nonwoven fabric, 16 ... String-like elastic elastic member, 20 ... Exterior sheet 21 ... 22 side joint edge, 24 ... waist elastic member, 25 ... waist elastic member, 26 ... dorsal curve elastic member, 28 ... ventral curve elastic member, 29 ... leg circumference cut line, F ... predecessor Around, B ... back body

Claims

It consists of an absorbent main body including an absorbent body having a substantially rectangular planar shape and an exterior sheet integrally provided on the outer surface side of the absorbent main body, and is folded at the crotch lower part of the diaper and the front body and the rear of the exterior sheet In a pants-type disposable diaper in which a waist opening and a pair of left and right leg openings are formed in a product state by joining the body on both sides,
The exterior sheet includes a waist elastic member arranged around the waist opening, and a plurality of waist elastic members arranged along the horizontal direction with a space in the vertical direction between the front body and the back body. In addition, each of the front body and the back body extends from the one side joint edge that joins the front body and the back body to the crotch side, bypasses the crotch side and reaches the other side joint edge of the front body and the back body And a plurality of curved elastic member groups arranged at intervals without crossing each other, and the start and end of the curved elastic member groups are substantially from the upper part to the lower part of the joint edge between the front body and the rear body. And the arrangement interval of the curved elastic member group at the joint edge between the front body and the back body is substantially the same as the arrangement interval of the curved elastic member group at the crotch part. and 2 Apart three approximately resilient and elastic members as substantially Ichitaba in close without a leg elastic member disposed along the leg line,
The curved elastic member group arranged on the back body side is biased toward the front body side with respect to the crotch lower part folding line of the diaper in the crotch part,
The curved elastic member group disposed on the front body side has an acute angle crossing angle between the curved elastic member group and the absorbent main body side edge of 28 ° or less and 20 ° at the intersection with the side edge of the absorbent main body . The curved elastic member group disposed on the back body side and having the above-mentioned configuration has an acute angle crossing angle between the curved elastic member group and the absorbent main body side edge at the intersection with the side edge of the absorbent main body. A pants-type disposable diaper characterized by being 45 ° or more and 60 ° or less .

The pants-type disposable diaper according to claim 1, wherein at least five of the curved elastic member groups are arranged in each of the front body and the back body.

In the joint edge part of the front body and the back body, the elastic member located closest to the waist opening in the curved elastic member group arranged on the front body side is from the lowermost elastic member of the waist elastic member. The underpants-type disposable diaper according to claim 1, wherein the distance is within 20 mm.

In the joint edge part of the front body and the back body, the elastic member located closest to the waist opening in the curved elastic member group disposed on the back body side is from the lowermost elastic member of the waist elastic member. The underpants-type disposable diaper according to any one of claims 1 to 3, wherein the distance is 20 mm or less.

The pants-type disposable diaper according to any one of claims 1 to 4, wherein the elastic member located on the crotch side of the group of curved elastic members has a distance from the crotch lower folding line of the diaper within ± 50 mm.

The pants-type disposable diaper according to any one of claims 1 to 5, wherein the curved elastic member group disposed in the front body and the back body is turned in an arcuate curved shape at a crotch part or a detour part on the crotch side.

The pants-type disposable diaper according to claim 1, wherein the curved elastic member group is cut and discontinuous on the absorbent body.

The pants-type disposable diaper according to any one of claims 1 to 7, wherein the waist elastic member group is cut and discontinuous on the absorbent body.

The most crotch lower elastic member in the curved elastic member group arranged on the front body side and the most crotch lower elastic member in the curved elastic member group arranged on the rear body side cross each other at the crotch part. The underpants type disposable diaper in any one of Claims 1-8 which adjoin without doing.