JP6095211B2 - Pants-type absorbent article and manufacturing method thereof - Google Patents

Description

  The present invention relates to a pants-type absorbent article and a method for producing the same.

Conventionally, as a pants-type absorbent article, the outer packaging material is divided into an abdominal sheet member disposed on the wearer's ventral side and a dorsal sheet member disposed on the wearer's dorsal side. The main body is fixed so as to span the abdominal seat member and the back seat member, and the left and right side edges of the abdominal seat member are joined to the left and right side edges of the back side seat member, and the waist A pants-type absorbent article formed in a pants-type having an opening and a pair of leg openings is known.
For example, Patent Document 1 includes, as such a pant-type absorbent article, an annular elastic belt composed of a front belt portion and a rear belt portion and an absorbent main body, and a longitudinal portion of the rear belt portion (back side seat member). A pull-on garment is described in which the length in the direction is longer than the length in the longitudinal direction of the front belt portion (ventral side seat member).

Further, in Patent Document 2, a separation part made of a slit or an elongated opening is formed in the abdominal sheet member and the back sheet member, and the crotch part side is pulled upward in the oblique direction toward the waist side from the separation part. Disposable disposable diapers are described.
Moreover, in patent document 3, the outer sheet | seat body for front bodies or back bodies is joined to the absorptive main body in the crotch side direction in the width direction center part of a diaper, and a diaper width direction center part is joined. The paper diaper whose longitudinal direction dimension is longer than the longitudinal dimension of both sides in the diaper width direction is described. In this paper diaper, a material that can be expanded and contracted in the longitudinal direction of the diaper is used for the exterior sheet for the front body or the back body.

Special table 2008-508082 JP 2010-162277 A JP 2009-247418 A

The outer packaging material is divided into a front and rear split type pants-type absorbent article, wherein the outer packaging material is divided into an abdominal sheet member disposed on the stomach side of the wearer and a back side sheet member disposed on the back side of the wearer. A belt-like sheet member having a constant width in the length direction is used for the abdomen side sheet member and the back side sheet member, or one wide sheet is cut while moving the cutting point in the width direction of the wide sheet. Therefore, the cutting loss (trim loss) can be minimized by using the two divided as the ventral sheet member and the dorsal sheet member.
However, when a belt-like sheet member having a constant width is used as in the pull-on garment of Patent Document 1, on the front side of the wearer, in the vicinity of the wearer's buttocks on the outer sides of both side edges of the absorbent main body Is exposed, and the wearer's buttocks are greatly exposed outside the both side edges of the absorbent main body on the rear side of the wearer, and in either case, there is a problem that it is easy to give anxiety to leakage. On the other hand, the method of dividing the wide sheet into two and using it as the ventral sheet member and the dorsal sheet member has a problem that one shape restricts the other shape.

Patent Document 2 describes that the disposable diaper of Patent Document 2 can have the edge of the leg opening formed into a shape along the periphery of the buttocks and the buttocks, but in the disposable diaper of Patent Document 2, Due to the presence of the elongated opening, design constraints such as tightening force around the waist of the wearer by the abdomen seat member or the back seat member are imposed. Moreover, in the disposable diaper of Patent Document 2, the degree of freedom of deformation of the region on the crotch part side from the spacing part is inferior, and when the abdominal sheet member or the back sheet member is forcibly expanded in the vertical direction of the diaper, The end of the slit or the elongated opening is torn, the original function of tightening the wearer's waist is deteriorated, and the leaky impression is more easily given.
Patent Document 3 describes that the leg fit that is curved along the line around the leg and the effect of preventing leakage of body fluid from the leg circumference are improved. The member is joined to the absorbent main body in the crotch direction in an expanded state, affecting the stretchability of the abdominal sheet member or the back sheet member in the diaper width direction, or by stretching in the longitudinal direction at the time of joining. A downward pulling force is developed in the part, and it is easy to fall off.

  Therefore, the subject of this invention is providing the underpants type absorbent article which can eliminate the fault which the prior art mentioned above has.

  The present invention is fixed over the abdominal sheet member disposed on the abdomen side of the wearer, the dorsal sheet member disposed on the dorsal side of the wearer, and the abdomen sheet member and the dorsal sheet member. A pants-type absorbent article comprising an absorbent main body and having a waist opening and a pair of leg openings, wherein the abdomen-side sheet member and the back-side sheet member have elasticity in the article lateral direction. And at least one of the abdominal side sheet member and the back side sheet member is connected to the center line side of the article in the longitudinal direction of the article, and a third sheet member having elasticity in the article longitudinal direction is connected. The portion overlapping with the absorbent main body is joined to the absorbent main body in a state where the portion is extended toward the center line side of the article in the lateral direction, and in the vicinity of the absorbent main body, as the article approaches the absorbent main body, Pants type with a part where the length of the direction gradually increases There is provided a Osamusei article.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to suppress or reduce generation | occurrence | production of the trim at the time of manufacture, the underpants type absorbent article excellent in the covering property, mounting | wearing property, and leakage prevention property of a buttocks and a buttocks can be provided.

FIG. 1 is a perspective view showing a pants-type disposable diaper according to the first embodiment of the present invention. FIG. 2 is a developed plan view of the developed state of the diaper shown in FIG. 1 as viewed from the absorbent main body side. FIG. 3 is a view showing an example of a stretchable sheet preferably used as the third sheet member, in which (a) is a plan view and (b) is an enlarged sectional view taken along line III-III of (a). FIG. 4 is a plan view showing another example of a stretchable sheet that is preferably used as the third sheet member. (A) is a natural state (contracted state), and (b) is a part of the sheet stretched in the width direction. It is a figure which shows a state. FIG. 5 is an explanatory diagram of the production process of the stretchable sheet shown in FIG. FIG. 6 is an explanatory diagram of a preferred method for manufacturing the diaper shown in FIG. FIG. 7 is a plan view showing still another example of the stretchable sheet preferably used as the third sheet member, where (a) is a natural state (contracted state), and (b) is a part of the stretched sheet extending in the width direction. FIG. FIG. 8 is a plan view showing still another example of a stretchable sheet preferably used as the third sheet member, where (a) is a natural state (contracted state), and (b) is a part of which is expanded in the width direction. FIG.

Below, the underpants type absorbent article of this invention is demonstrated, referring drawings based on the preferable embodiment.
The pants-type disposable diaper 1 (hereinafter also referred to as diaper 1) according to the first embodiment of the present invention, as shown in FIG. 1, is a ventral sheet member 2A disposed on the stomach side of the wearer, and the wearer's side. It comprises a back sheet member 2B disposed on the back side, and an absorptive main body 3 that is fixed over the back sheet member 2A and the back sheet member 2B. Moreover, the diaper 1 has the abdominal part A distribute | arranged to a wearer's belly side, the back | dorsal part B distribute | arranged to a wearer's dorsal side, and the crotch part C distribute | arranged between them at the time of wear A pair of side seal portions S and S is formed by joining both end portions of the abdominal side portion A and both end portions of the back side portion B in the article width direction Y. Moreover, the waist opening WO and a pair of leg opening LO are formed by this joining.

  As shown in FIG. 2, the ventral sheet member 2 </ b> A and the back sheet member 2 </ b> B in the diaper 1 both have an outer layer sheet 22 that forms the outer surface of the diaper, an inner layer sheet 23 disposed on the inner surface side of the outer layer sheet 22, A plurality of thread-like elastic members 24 disposed between the two sheets 22 and 23, and a waist stretchable part G1 and a waistline stretchable part G2 are formed on each of the abdominal sheet member 2A and the back sheet member 2B. Has been. The plurality of elastic members 24 are oriented in the article lateral direction Y, and both the waist stretchable part G1 and the waistline stretchable part G2 are stretchable in the article lateral direction Y.

The waist elastic part G1 is formed in the opening peripheral part of the waist opening Wo. Further, the waist stretchable part G1 is formed outwardly from both ends 3a and 3b in the same direction of the absorbent main body 3 in the longitudinal direction X of the article.
The opening peripheral edge of the waist opening Wo is, for example, a range in which the distance from the peripheral edge We of the waist opening Wo is within 3 cm in each of the abdominal sheet member 2A and the back sheet member 2B.
The waist elastic part G2 is formed between the waist elastic part G1 and the lower edge part 2d in each of the abdominal sheet member 2A and the back sheet member 2B.
The longitudinal direction of the article is a direction from a portion disposed on the abdomen side of the wearer to a portion disposed on the back side through a portion disposed between the crotch and usually coincides with the longitudinal direction of the absorbent main body 3. ing. On the other hand, the article lateral direction Y is a direction orthogonal to the article longitudinal direction X in the developed state of the diaper as shown in FIG. 2, and as shown in FIG. The cylindrical waistline portion formed by connecting both side portions of B coincides with the circumferential direction.

It is preferable that the waist stretchable part G1 and the waistline stretchable part G2 each exhibit elasticity in at least a part located outward from both side edges of the absorbent main body 3 in the article lateral direction Y. Moreover, it is preferable that waist expansion-contraction part G1 expresses a stretching property over the full length between the side seal parts S and S of 2A of belly side sheet members, and the back side sheet member 2B.
The elastic member 24 forming the waist stretchable part G1 and the waist stretchable part G2 in this embodiment extends across the entire width of the abdominal sheet member 2A and the back sheet member 2B across the absorbent main body 3. The elastic member 24 that forms the waistline expansion and contraction part G2 is such that the elastic member 24 loses the elasticity of the elastic member by heat treatment or the like at the portion overlapping the central portion in the width direction of the absorbent main body 3, In this portion, it is preferable that the elastic member 24 does not impart stretchability to the ventral sheet member 2A and the dorsal sheet member 2B.

  The two sheets 22 and 23 constituting the abdominal sheet member 2A and the back sheet member 2B may be fixed with an adhesive in substantially the entire area of each of the abdominal sheet member 2A and the back sheet member 2B. It is good, and it is joined at a large number of joints formed in a dotted shape so as not to pass through the elastic member 24, as between two sheet materials in the elastic stretchable member described in JP-A-2005-80859. May be.

  The ventral sheet member 2A and the dorsal sheet member 2B in the diaper 1 both have a horizontally long rectangular shape in the state where the elastic member 24 is extended and expanded in a planar shape, and the length of the article in the longitudinal direction X is long. The lengths La and Lb are uniform over the entire length in the article transverse direction Y.

  The abdominal sheet member 2A and the back sheet member 2B each have a pair of side edge portions 2a and 2b along the article longitudinal direction X. In the pair of side seal portions S and S, the pair of side edge portions. 2a and 2b are joined. Specifically, the side edge 2a of the ventral sheet member 2A and the side edge 2a of the dorsal sheet member 2B are joined, and the side edge 2b of the ventral sheet member 2A and the side of the dorsal sheet member 2B The edge 2b is joined.

The abdominal sheet member 2A and the back sheet member 2B are rectangular in a state in which the elastic member 24 is extended and expanded in a planar shape, and a waist opening WO as a pair of edge portions along the diaper lateral direction Y, respectively. It has an upper edge portion 2c located on the side and a lower edge portion 2d located on the article lateral direction center line Ly side. The article lateral direction center line Ly is a center line extending in the article transverse direction Y, and is a center line that bisects the entire length of the article in the article longitudinal direction X. The article longitudinal center line Lx is a center line extending in the article longitudinal direction X, and is a center line that bisects the entire length of the article in the article lateral direction Y.
And the 3rd sheet | seat members 4A and 4B which have a stretching property in the articles | goods longitudinal direction X are connected with the abdominal sheet | seat member 2A and the back | dorsal sheet | seat member 2B in the horizontal direction center line Ly side of the articles | goods in each. The third sheet members 4A and 4B are formed in the same length in the article lateral direction Y as the abdominal sheet member 2A and the back sheet member 2B, respectively.
More specifically, the lower edge 2d of the abdominal sheet member 2A and the upper edge 4c of the third sheet member 4A are joined, and the lower edge 2d of the back sheet member 2B and the third sheet member 4B. Are joined to the upper edge 4c. As a joining mode of the lower edge 2d of the abdominal sheet member 2A and the upper edge 4c of the third sheet member 4A, and the lower edge 2d of the back sheet member 2B and the upper edge 4c of the third sheet member 4B. As shown in FIG. 2 and the like, the third sheet member 4A or 4B may be overlapped and bonded to the surface of the abdominal sheet member 2A or the back sheet member 2B on the absorbent main body side, or the ventral sheet member The third sheet member 4A or 4B may be overlapped and joined to the surface of the outer surface side of the diaper of 2A or the back sheet member 2B. Further, the third sheet member 4A or 4B may be sandwiched between two sheets constituting the abdominal sheet member 2A or the back sheet member 2B, and the layers may be joined.

FIG. 3 is a diagram illustrating an example of a stretchable sheet that is preferably used as the third sheet members 4A and 4B.
In the stretchable sheet 4 shown in FIG. 3, a plurality of thread-like elastic bodies 7 are bonded and fixed between the two sheets 5 and 6 in a state where each of the elastic sheets 7 extends in the width direction X ′ of the sheets 5 and 6. In the state where the two sheets 5 and 6 are expanded in a planar shape, the sheet is a horizontally long rectangular shape that is long in the length direction of the stretchable sheet 4 corresponding to the article lateral direction Y, and the elastic member is The product is oriented in the longitudinal direction Y. The plurality of thread-like elastic bodies 7 in the stretchable sheet 4 are arranged at predetermined intervals in the length direction Y ′ of the stretchable sheet 4 corresponding to the article lateral direction Y, and each of the stretchable elastic bodies 7 corresponds to the article longitudinal direction X. The sheet 5 is fixed between the sheets 5 and 6 while being stretched in the width direction X ′. Thereby, the elastic sheet 4 has elasticity in the article longitudinal direction X.
Further, when the stretchable sheet 4 is used for the pants-type absorbent article as the third sheet members 4A and 4B, end regions located at both ends in the article longitudinal direction X of the third sheet members 4A and 4B. 41 and 43 have end joints 9 and 9 in which the two sheets 5 and 6 are joined with an adhesive, and two sheets are provided in the central region 42 located between the end regions 41 and 43. The sheet 5 and 6 have a plurality of central joint portions 10 joined by an adhesive. The width W <b> 1 of the end joint 9 is preferably wider than the width W <b> 2 of the center joint 10. The end joint 9 is formed as a band-shaped region having a predetermined width, and a plurality of central joints 10 are formed in a straight line in the central region 42.

  The end joint portion 9 and the center joint portion 10 in the present embodiment are portions where the sheets 5 and 6 are joined by an adhesive, preferably a hot melt adhesive, and correspond to the article lateral direction Y, respectively. The stretchable sheet 4 is formed so as to extend in the longitudinal direction Y ′. Further, the plurality of thread-like elastic bodies 7 are arranged from the end joint portion 9 of one end region 41 to the end joint portion 9 of the other end region 43, and a pair of end joint portions. 9, 9 and a portion overlapping each of the plurality of central joint portions 10 therebetween. The thread-like elastic body 7 is fixed in a state of being sandwiched between the two sheets 5 and 6 via an adhesive at a portion overlapping the end joint 9 and the center joint 10. In other words, in the portion overlapping with the thread-like elastic body 7 in each of the end joint portion 9 and the center joint portion 10, those thread-like elastic bodies 7 are fixed between the sheets 5 and 6 via the adhesive. In each of the end joint portion 9 and the central joint portion 10, the sheets 5 and 6 are directly joined to each other via an adhesive at a portion that does not overlap the thread-like elastic body 7. In the end joint portion 9 and the center joint portion 10, it is preferable that the thread-like elastic body 7 and one or both of the two sheets 5 and 6 sandwiching the elastic body 7 are joined with an adhesive.

Further, the end joint portion 9 and the center joint portion 10 are formed at a predetermined interval in the width direction X ′ of the stretchable sheet 4 corresponding to the article longitudinal direction X. Between the central joints 10 and between adjacent central joints 10 is a non-adhesive region where no adhesive is disposed between the sheets 5 and 6. In these non-bonded regions, the thread-like elastic body 7 is not fixed to the sheets 5 and 6.
In the state where the two sheets 5 and 6 are spread out in a plane, the thread-like elastic body 7 in the central region 42 is in an extended state, and when the external force spread in a plane is removed, the thread-like elastic body 7 is arranged. The center region 42 that has been contracted contracts, and the elastic sheet 4 also contracts in the width direction. The end of the longitudinal direction of the thread-like elastic body 7 or its vicinity is fixed to the end joint 9.

  As an adhesive used for bonding the sheets 5 and 6 and fixing the thread-like elastic body 7 between the sheets, this type of elastic sheet (waist panel) is used to join the members. Can be used without particular limitation. For example, amorphous polyolefin, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylate copolymer (EEA), styrene-butadiene-styrene block copolymer ( Thermoplastic polymers such as SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene / butylene-styrene block copolymer (SEBS), styrene-ethylene / propylene-styrene block copolymer (SEPS) And mixtures thereof. The adhesive is preferably a hot melt type (hot melt adhesive).

The width W2 of the central joint 10 is preferably 0.5 mm or more, more preferably 1 mm or more, preferably 5 mm or less, more preferably 2 mm or less, and preferably 0.5 mm or more and 5 mm or less. More preferably, it is 1 mm or more and 2 mm or less.
As described above, the width W1 of the end joint 9 is preferably larger than the width W2 of the center joint 10. For example, the width W1 of the end joint 9 is equal to the width W2 of the center joint 10. Preferably it is 2 times or more, More preferably, it is 4 times or more, Preferably it is 40 times or less, More preferably, it is 20 times or less. The width W1 of the end joint 10 is preferably 2 mm or more and 20 mm or less, and more preferably 4 mm or more and 10 mm or less.
The width W3 between the end joint 9 and the central joint 10 and the width W4 between the central joints 10 are each independently preferably 1 mm or more, more preferably 2 mm or more, and preferably 30 mm. Hereinafter, it is more preferably 20 mm or less, preferably 1 mm or more and 30 mm or less, more preferably 2 mm or more and 20 mm or less.
The distance W5 between the thread-like elastic bodies 7 is preferably 1 mm or more, more preferably 3 mm or more, preferably 50 mm or less, more preferably 30 mm or less, and preferably 1 mm or more and 50 mm or less. More preferably, it is 3 mm or more and 30 mm or less.
Further, the number of central joints 10 intermittently arranged in the longitudinal direction of the article is preferably 2 or more, more preferably 3 or more, and preferably 20 or less, more preferably 10 or less, Further, it is preferably 2 or more and 20 or less, more preferably 3 or more and 10 or less.

  As shown in FIG. 1 or 2, the absorbent main body 3 in the diaper 1 is interposed between a liquid-permeable top sheet 31, a liquid-impermeable or water-repellent back sheet 32, and both sheets 31 and 32. The absorbent core 33 is provided. The absorbent core 33 is an aggregate of fibers such as pulp fibers (may be a non-woven fabric) or a structure in which particles of a water-absorbing polymer are held. Covered by a sheet. As the core wrap sheet, a water-permeable thin paper (tissue paper) or a nonwoven fabric is used.

A pair of three-dimensional guard forming sheets 34, 34 are disposed on both sides of the absorbent main body 3. The three-dimensional guard forming sheet 34 has an elastic member 35 for forming a three-dimensional guard in the vicinity of the edge near the center line Lx in the article vertical direction. And a three-dimensional guard is formed by standing so that a portion having a predetermined width is separated from the top sheet 31.
Further, side flap portions 36 are formed on both sides of the absorbent main body 3. The side flap part 36 is composed of a sheet material extending outward in the article width direction Y from the side edge 33a of the absorbent core 33, and a gather-form thread-like elastic member 37 fixed to the sheet material. When worn, a gather is formed by the contraction force of the elastic member 37, and fits well around the legs.

FIG. 4 is a diagram illustrating another example of the stretchable sheet used as the third sheet members 4A and 4B.
The stretchable sheet 4 ′ shown in FIG. 4 has the shrinkage force in the width direction X ′ of the stretchable sheet corresponding to the article longitudinal direction X adjusted so as not to shrink the absorbent core 33 on the stretchable sheet 4 described above. A region R2 is provided.
The region R2 is formed at the center in the longitudinal direction Y ′ of the stretchable sheet corresponding to the article transverse direction Y, and the region R2 absorbs the shrinkage force in the width direction X ′ of the stretchable sheet. The sex core 33 is lost or lowered so as not to shrink.
More specifically, the stretchable sheet 4 ′ eliminates the range R3 that overlaps the absorbent main body 3 and the center joint portion 10 of the constant range R2 that is formed by the adjacent portion RS in the stretchable sheet 4 described above and the range. The thread-like elastic body 7 in R2 is cut, and the other configuration is the same as that of the stretchable sheet 4 described above.

  The 3rd sheet members 4A and 4B in diaper 1 of a 1st embodiment consist of this elastic sheet 4 ', and as shown in Drawing 4 (b), 3rd sheet members 4A and 4B are especially in the above-mentioned field R2. A range R33 overlapping the absorbent core 33 is joined to the absorbent main body 3 in a state where the range R33 extends toward the article lateral center line Ly indicated by the arrow P. Further, as a result, the third sheet members 4A and 4B assembled in the diaper 1 approach the absorbent main body 3 in the vicinity of the absorbent main body 3 in the article lateral direction Y as shown in FIG. Accordingly, portions E and E in which the length in the longitudinal direction X of the article gradually increases are formed. The lower edge 4d of the portions E and E of the third sheet members 4A and 4B approaches the lateral center line Ly of the article as it approaches the absorbent main body 3.

The diaper 1 of this embodiment can be worn similarly to a normal pants-type disposable diaper.
<Effect when the third sheet member is provided on the ventral side or the back side>
According to the diaper 1 of the present embodiment, the third sheet member contracts in the vertical direction and deforms into a shape that conforms to the user's body shape, so there is no sense of incongruity and excellent comfort, and the shape of the side portion contracts. The outline is refreshing.
In particular, apart from the ventral sheet member 2A and back sheet member 2B having elasticity in the article lateral direction, third sheet members 4A and 4B having elasticity in the article vertical direction are used, and the third sheet member 4A, 4B is stretched to form the shape of the legs E, E and the like around the legs, so that the waist is compared with the case where the ventral seat member 2A and the back seat member 2B are stretched in the longitudinal direction of the article. Diaper misalignment, such as the peripheral edge We of the opening Wo and the waist stretchable part G1 shifting downward, is less likely to occur, and adverse effects such as wearing feeling and deterioration of leakage prevention are less likely to occur.

<Effect when the third sheet member is provided on the back side>
According to the diaper 1 of the present embodiment, a part of the third sheet member 4B having elasticity in the longitudinal direction X of the article is extended and fixed to the absorbent main body 3, thereby the first side on the back side B side. In the vicinity of the absorbent main body 3 of the three-sheet member 4B, portions E and E in which the length in the article longitudinal direction X gradually increases as approaching the absorbent main body 3 are formed, and thus there are widened portions. The third sheet member 4B is curved so as to wrap around the buttock and is excellent in coverage of the buttock, and can also be manufactured without generating a trim.
<Effect when the third sheet member is provided on the ventral side>
Moreover, according to the diaper 1 of the present embodiment, a part of the third sheet member 4A having elasticity in the longitudinal direction X of the article is extended and fixed to the absorbent main body 3, and thereby, on the abdominal side A side. In the vicinity of the absorbent main body 3 of the third sheet member 4A, the portions E and E in which the length in the article longitudinal direction X gradually increases as the absorbent main body 3 is approached are formed. In addition, it does not have a shape like a bundo, the skin exposure is reduced, the appearance is excellent, and it is possible to manufacture without generating trim. In addition, since a wider range of the side flap portion 36 toward the center in the longitudinal direction of the article is covered, the gathers formed around the legs fit well, and the leak-proof property increases.

  In the third sheet members 4A and 4B, the portions E and E in which the length in the longitudinal direction of the article gradually increases as approaching the absorbent main body 3, the distance from the side edge of the absorbent main body 3 is within 30 mm. It is preferable to have at least a part thereof. Further, the portions E and E in which the length in the longitudinal direction of the article gradually increases as approaching the absorbent main body 3 are the vertical length of the article of the third sheet member in the entire area between the side edge of the absorbent main body 3 and the side seal portion. It may be a part when the length in the direction is gradually increased.

From the viewpoint of the covering property of the buttocks or the covering property of the buttocks, the third sheet member 4A and the third sheet member 4B are each independently provided with a portion having the maximum length in the article longitudinal direction X and a portion in the article longitudinal direction. The distance Le (see FIG. 2) in the longitudinal direction X between the minimum position is preferably 10 mm or more, more preferably 20 mm or more, and preferably 150 mm or less, more preferably 100 mm or less. The thickness is preferably 10 mm or more and 150 mm or less, more preferably 20 mm or more and 100 mm or less.
The distance Le is measured in a state where the abdomen-side sheet member and the back-side sheet member including the elastic body are spread in a flat shape and the third sheet member is naturally contracted. In addition, the dimensions of the portions other than the distance Le of the abdominal side sheet member, the back side sheet member, and the third sheet member (elastic sheet 4) are expanded in a planar shape by extending the elastic members. Measure in the state.

In the diaper 1 of the present embodiment, the third sheet member 4A, 4B is provided with a region R2 in which the contraction force in the article longitudinal direction X is adjusted so that the absorbent core 33 is not contracted.
For this reason, it is possible to prevent deterioration in fit and deterioration in absorption performance caused by the absorbent core 33 contracting and deforming in the longitudinal direction of the article. Such an effect is also exerted when the contraction force of only the portion overlapping the absorbent core 33 in the third sheet member 4A or 4B is reduced so as not to contract the absorbent core 33.

In the third sheet member 4A, 4B, the region R2 for adjusting the contraction force, more specifically, the length W6 in the article lateral direction Y of the region R2 for eliminating or reducing the contraction force is the ventral sheet to which each is connected. Preferably, it is 10% or more, more preferably 20% or more, and preferably 80% or less of the total length in the article transverse direction Y in the member or the back seat member (same as the length between the pair of side seal portions). More preferably, it is 70% or less, preferably 10% or more and 80% or less, more preferably 20% or more and 70% or less.
Further, the length W6 is preferably 80% or more, more preferably 90% or more with respect to the total length in the article transverse direction Y of the absorbent main body 3 in a portion overlapping the third sheet member 4A or 4B. Further, it is preferably 150% or less, more preferably 120% or less, preferably 80% or more and 150% or less, more preferably 90% or more and 120% or less.
Further, the length W6 is preferably 95% or more, more preferably 100% or more, with respect to the total length of the absorbent core 33 in the article transverse direction Y at the portion overlapping the third sheet member 4A or 4B. Further, it is preferably 175% or less, more preferably 145% or less, preferably 95% or more and 175% or less, more preferably 100% or more and 145% or less.

  Further, in the diaper 1 of the present embodiment, the third sheet member 4A and the third sheet member 4B eliminate not only the range R33 overlapping the absorbent core 33 but also the contraction force in the range R3 overlapping the absorbent main body 3. It is. Therefore, it is possible to prevent the expansion and contraction force of the side flap portion 36 from being tightened excessively and impairing the fit.

  Furthermore, in the diaper 1 of the present embodiment, the third sheet member 4A and the third sheet member 4B have the contraction force in the adjacent region RS as well as the range R3 overlapping the absorbent main body 3 disappeared. In addition to the portion R3 that overlaps the absorbent body 3, the adjacent portion RS can be worn comfortably because the size of the fabric increases due to the release of the contraction force in the portion when the contraction force in the vertical direction is reduced or reduced. In particular, the product can be designed flexibly without changing the third sheet members 4A and 4B itself, such as being able to meet the application size of a user having a particularly large size.

  Further, as in the present embodiment, the length of the third sheet members 4A and 4B in the article longitudinal direction X is adjusted by adjusting the contraction force in the article longitudinal direction of the adjacent portion RS of the portion R3 overlapping with the absorbent body 3 as in the present embodiment. When the contraction force in the article longitudinal direction of the parts E and E where the angle gradually increases is reduced or eliminated, the abdominal sheet member 2A is pulled by pulling the third sheet members 4A and 4B in the direction of the arrow P in FIG. Since the influence of the force in the vertical direction on the back sheet member 2 </ b> B can be reduced or eliminated, the diaper is less likely to slip when worn.

  In addition, as a method of reducing the contraction force of the adjacent part RS of the part R3 which overlaps with the absorber body 3 or the parts E and E in which the length of the article longitudinal direction X in the third sheet members 4A and 4B gradually increases, expansion and contraction is possible. A method of leaving a plurality of center joints 10 in the adhesive sheet 4 and cutting the thread-like elastic body 7 only in a part of a plurality of regions between the adjacent center joints 10 and the like. .

  When the contraction force of the adjacent part RS disappears or decreases in addition to the range overlapping with the absorbent main body 3, the width W7 (length in the lateral direction of the article) of the adjacent part RS that disappears or reduces the contraction force is the absorbent main body. The distance between the side edge 3 and the side seal portion is preferably 5% or more, more preferably 10% or more, preferably 70% or less, more preferably 50% or less, and preferably Is 5% to 70%, more preferably 10% to 50%.

In the third sheet member 4A, 4B according to the present invention, the entire region of the portion overlapping the absorbent main body 3 may be joined to the absorbent main body 3 by an adhesive or the like, or the portion overlapping the absorbent main body 3 respectively. May be joined to the absorbent main body 3 with an adhesive or the like.
In the diaper 1 of the present embodiment, the third sheet members 4A and 4B extend from the absorbent core 33 in the absorbent main body 3 and are joined to the side flap portions 36 that are stretchable in the article longitudinal direction X. Has been. With such a configuration, the fit to the circumference of the thigh is improved. In FIG. 2, the oblique hatched portion is a region where the third sheet members 4 </ b> A and 4 </ b> B and the side flap portion 36 are joined.

In the diaper 1 of the present embodiment, the left and right side flap portions of each of the third sheet members 4A and 4B are joined to the absorbent main body 23 with an adhesive over the entire area. Further, the abdominal sheet member 2A and the back sheet member 2B also have a portion where the absorbent main body 3 overlaps, and the entire area of the portion overlapping the absorbent main body 3 is joined to the absorbent main body 3 by an adhesive. Yes. However, the bonding mode between the abdominal sheet member 2A and the back sheet member 2B and the absorbent main body 3 and the bonding mode between the third sheet members 4A and 4B and the absorbent main body 3 are not limited to the above-described modes, and may be appropriately selected. It can join in the aspect of.
In addition, the width | variety (length of articles | goods horizontal direction) of the area | region joined to the 3rd sheet | seat member 4A or 4B with respect to the full width (length of articles | goods horizontal direction) of the absorptive main body 3 becomes like this. % Or more, more preferably 85% or more, preferably 100% or less, preferably 80% or more and 100% or less, more preferably 90% or more and 100% or less.

  Moreover, according to the diaper 1 of this embodiment, the effect that it is easy to escape moisture by a ventilation effect is also show | played. That is, since the third sheet members 4 and 4 ′ have a concave and convex shape such as the cross-sectional shape of FIG. 3B due to the contraction, the contact with the skin is less and a sense of discomfort such as rubbing is less likely to occur. Moisture is less likely to be trapped due to the ventilation effect of the non-contact part space. In addition, by providing the third sheet members 4 and 4 ′ at the step where there is a lot of movement, the ventilation effect is caused by the bellows effect of the concavo-convex material due to the compression / release operation, and a further effect can be expressed.

The pants-type absorbent article of the present invention is like a stretchable sheet 4 shown in FIG. 3 as a third sheet member 4A connected to the abdominal sheet member 2A or a third sheet member 4B connected to the back sheet member 2B. Moreover, it is also preferable to use what has a stretching property in the direction X ′ corresponding to the longitudinal direction of the article for the portion overlapping the side sheet portion 36 of the absorbent main body 3. As such an elastic sheet, it is also possible to use a sheet in which the elasticity of only the portion overlapping the absorbent core 33 is lost or reduced.
In these cases, since the force acts in the vertical direction, the fitting property is good and the effect of preventing the slippage is produced. That is, since the absorbent body is mounted on the abdominal sheet member that can be expanded in the lateral direction, the back sheet member, and the third sheet member that can be expanded in the vertical direction, the absorbent body can be operated flexibly and fit. Becomes better. In particular, when the user moves, the extension of the third seat member in the vertical direction works effectively, and the ability to follow the legs without damaging the slip-off prevention force applied to the lateral direction of the ventral seat and the back seat functions. To do.

Next, an embodiment of the method for producing the pant-type absorbent article of the present invention will be described taking the case of producing the above-described pants-type disposable diaper 1 as an example.
(Manufacture of elastic sheet used as third sheet member)
In a preferred embodiment of the present invention, first, an elastic sheet 4 ′ used as the third sheet members 4A and 4B is manufactured.
In order to manufacture the elastic sheet 4 ′, first, an elastic sheet 4M having a region R1 in which the central joint portion 10 does not exist intermittently in the longitudinal direction as illustrated in FIG. 5A is manufactured. The stretchable sheet 4M is, for example, a stretchable sheet manufacturing apparatus described in JP2011-282594A, or a stretchable sheet manufactured in JP2012-090836A, JP2011-282594A, or the like. In the continuous production of a stretchable sheet in which a thread-like elastic body is stretched between a pair of strip-like sheets and stretched in a direction intersecting the conveying direction of the strip-like sheet, one of the pair of strip-like sheets is used. Or it can manufacture by applying an adhesive agent so that the edge part junction part 9 and the center junction part 10 may be formed in the aspect shown in FIG.4 and FIG.5 (a) to the elastic sheet obtained by both. it can.
Next, as shown in FIG. 5 (b), the thread-like elastic body 7 in the region R1 in which the central joint portion 10 is eliminated in the obtained elastic sheet 4M is cut and overlapped with the absorbent core in the elastic sheet 4M. The contraction force of the portion disappears or is reduced (contraction force adjustment step). The thread-like elastic body 7 is cut by using a pressure roll or the like having a pressurizing portion having a plurality of convex portions spaced apart from each other on a peripheral surface, and the like. Pressurize from above. In the drawing, a black circle denoted by reference numeral 71 is a pressing portion of the sheet by the convex portion of the pressing portion, and the thread-like elastic body 7 is cut at the pressing portion.
In this manner, a belt-like stretchable sheet 4 ′ having intermittently in the length direction the region R2 in which the contractibility in the width direction has disappeared or decreased is obtained.

(Linking process)
Next, as shown in FIGS. 6 (a) and 6 (b), the continuum 2A ′ of the ventral sheet member and the continuum 2B ′ of the back sheet member manufactured by a known method are continuously conveyed, respectively. The belt-like stretchable sheets 4 ′ and 4 ′ produced as described above are connected to the two continuous bodies 2A ′ and 2B ′. The connection between the two continuous bodies 2A ′ and 2B ′ and the stretchable sheet 4 ′ is performed by connecting the side edge 4c ′ on the side of the stretchable sheet 4 that becomes the upper edge 4c of the third sheet member in the completed diaper. In the completed diaper in the body 2A ′, 2B ′, the side edge 2d ′ on the side that becomes the lower edge 2d of the abdominal or dorsal sheet members 2A, 2B is overlapped and joined. For this joining, an appropriate joining method such as an adhesive, a heat seal, an ultrasonic seal, a high frequency seal, or a combination thereof can be adopted.
By this connecting step, the back side of the abdomen-side connected composite sheet A ′ in which the stretchable sheet 4 ′ is connected to the continuum 2A ′ of the abdomen sheet member and the back of the stretched sheet 4 ′ in the continuum 2B ′ of the backside sheet member. Side connection composite sheet B ′ is obtained.

(Extension process)
Next, the region R2 of the stretchable sheet 4 ′ in each of the ventral connecting composite sheet A ′ and the back connecting composite sheet B ′ obtained in the connecting step is used as the continuum 2A ′ of the ventral sheet member or the back sheet. The member is extended in the direction of arrow P away from the portion formed of the continuous body 2B ′. This extending direction is a direction corresponding to the article longitudinal direction X in the diaper 1.
As a method of extending the region R2 of the stretchable sheet 4 ′, the side edge portion 4c ′ joined to the above-described ventral-side connected composite sheet A ′ or the back-side connected composite sheet B ′ in the stretchable sheet 4 ′. One surface of the opposite side edge 4d ′ is adsorbed by the first adsorbing means, and one surface of the part separated from the side edge 4d ′ in the direction orthogonal to the transport direction is adsorbed by the second adsorbing means. After that, any method such as a method of expanding the interval between the first suction unit and the second suction unit can be adopted.

(Absorbent body fixing process)
And the absorptive main body 3 is arrange | positioned on the said area | region R2 extended in elastic sheet | seat 4 ', and the absorptive main body 3 is joined with respect to the abdominal side connection composite sheet A' and the back side connection composite sheet B '. . In this joining, the absorbent main body 3 is joined on the stretched region R2 of the stretchable sheet 4 ′ so that the stretched state of the stretchable sheet 4 ′ is maintained. An adhesive is preferably used for this joining, but other joining methods may be employed instead of the adhesive or together with the adhesive. In addition, the absorptive main body 3 is also joined to the continuum 2A ′ of the ventral sheet member and the continuum 2B ′ of the back sheet member.
In the diaper 1 of the above-described embodiment, the diaper continuous body 1 ′ thus obtained is folded in two according to a conventional method as shown in FIG. And by cutting.

  According to the manufacturing method of the present embodiment, the above-described disposable diaper 1 excellent in the covering of the buttock and the buttock and the like can be efficiently produced without cutting the portion arranged around the leg into a predetermined shape and generating a trim. Can be manufactured.

The material for forming the diaper 1 will be described.
As the sheet materials 5 and 6 of the outer layer sheet 22, the inner layer sheet 23, and the stretchable sheet 4, various sheet materials conventionally used for absorbent articles such as disposable diapers can be used without particular limitation. For example, it is preferable to use a non-woven fabric, and the non-woven fabric is not limited to a single resin fiber, and a composite fiber such as a core-sheath type composite fiber or a side-by-side type composite fiber can also be used. Moreover, as a nonwoven fabric, an air through nonwoven fabric, a heat roll nonwoven fabric, a spun lace nonwoven fabric, a spun bond nonwoven fabric, a single layer nonwoven fabric of a melt blown nonwoven fabric, or a laminated nonwoven fabric in which these are laminated in two or more layers can be used. Moreover, as the outer layer sheet 22 and the inner layer sheet 23, a sheet or the like in which a nonwoven fabric and a film are integrated can be used.

  As the top sheet 31, the back sheet 32, the absorbent core 33, and the three-dimensional guard forming sheet 34, those conventionally used for absorbent articles such as disposable diapers can be used without particular limitation. For example, as the top sheet 31, a liquid-permeable nonwoven fabric, a perforated film, or a laminate thereof can be used, and as the back sheet 32, a resin film or a laminate of the resin film and the nonwoven fabric is used. Can do. As the absorbent core 33, for example, a fiber assembly of fiber materials such as pulp or a material in which a superabsorbent polymer is supported can be used. As the three-dimensional guard forming sheet 34, a stretchable film, a water-repellent nonwoven fabric, a woven fabric, or a laminated sheet thereof can be used.

  As a material for forming the elastic members 24, 35, and 37 and the thread-like elastic body 7, various elastic materials conventionally used for absorbent articles such as disposable diapers can be used without particular limitation. Examples thereof include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, and polyurethane. As the form of the elastic member, it is preferable to use a thread-like (thread rubber etc.) or string-like (flat rubber etc.) cross-section having a rectangular, square, round, polygonal cross section, or a multifilament type thread-like one. it can. The thread-like elastic body 7 may also be a string-like (flat rubber or the like).

As mentioned above, the manufacturing method of the underpants type absorbent article and the underpants type absorbent article of the present invention can be appropriately changed without being limited to the above-described embodiment.
For example, as shown in FIGS. 7 and 8, the elastic sheet used as the third sheet member eliminates one end joint 9 in addition to the center joint 10 and adjusts the contraction force in the longitudinal direction of the article. The region R2 may be provided. The stretchable sheet shown in FIG. 7 leaves the end joint 9 on the side close to the article lateral center line Ly in the completed diaper, while the end joint on the side close to the abdominal or back sheet members 2A and 2B. 9, the elastic sheet shown in FIG. 8 leaves the end joint 9 on the side close to the ventral or back side sheet members 2A and 2B, while the end on the side close to the article lateral center line Ly. The joint 9 is eliminated. The stretchable sheet shown in FIGS. 7 and 8 is a region R2 in which the shrinkage force adjusting step for cutting the above-described thread-like elastic body 7 or eliminating or reducing the shrinkage force is omitted and the shrinkage force in the longitudinal direction of the article is adjusted. Can be provided.
In the disposable diaper using the stretchable sheet shown in FIGS. 7 and 8 as the third sheet member, the same effects as the diaper 1 described above are exhibited.

Moreover, the underpants type absorbent article of this invention may use the elastic sheet 4 mentioned above for the 3rd sheet | seat member.
Further, the stretchable sheet used as the third sheet member may be one in which the two sheets 5 and 6 sandwiching the thread-like elastic body are bonded in the entire stretchable sheet. Moreover, you may use the thing which has a stretching property not only in an article | item longitudinal direction but an article | item lateral direction as a 3rd sheet | seat member.

Further, in the diaper 1 of the above-described embodiment, the third sheet member 4A and 4B are joined to the abdominal sheet member 2A and the back sheet member 2B, respectively. May be connected, or the third seat member may be connected only to the back seat member 2B.
The pant-type absorbent article may be a pant-type disposable diaper for infants or adults, a pant-type (shorts-type) sanitary napkin, a pant-type incontinence pad, or the like.
The description omitted in one embodiment described above and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately changed between the embodiments. Can be substituted.

The following pants-type absorbent article and a method for manufacturing a pants-type absorbent article are disclosed with respect to the above-described embodiment.
<1>
An abdominal sheet member disposed on the wearer's ventral side, a dorsal sheet member disposed on the wearer's dorsal side, and an absorptive main body secured over the abdominal sheet member and the dorsal sheet member; A pants-type absorbent article having a waist opening and a pair of leg openings,
The ventral sheet member and the back sheet member have elasticity in the article lateral direction,
At least one of the ventral sheet member and the back sheet member is connected to the article lateral direction center line side, and a third sheet member having elasticity in the article longitudinal direction is connected,
The third sheet member is joined to the absorbent main body in a state where a portion overlapping the absorbent main body is extended toward the center line of the article in the lateral direction, and in the vicinity of the absorbent main body, A pants-type absorbent article having a portion in which the length in the longitudinal direction of the article gradually increases as it approaches the main body.

<2>
The absorbent main body includes an absorbent core and an absorbent core composed of a core wrap sheet that covers the absorbent core, and the contraction force in the longitudinal direction of the article is adjusted so that the third core member does not contract the absorbent core. The underpants-type absorbent article according to <1>, wherein the region is provided.
<3>
The third sheet member is composed of an elastic sheet having two sheets and a plurality of elastic members fixed in an extended state between them, and the elastic members are oriented in the longitudinal direction of the article, <1 > Or <2> The pants-type absorbent article.
<4>
The plurality of thread-like elastic bodies in the elastic sheet are arranged at predetermined intervals in the length direction of the elastic sheet corresponding to the article lateral direction, and extend in the width direction of the elastic sheet corresponding to the article vertical direction, respectively. The pants-type absorbent article according to <3>, wherein the pants-type absorbent article is fixed between the sheets in a state of being applied.
<5>
The absorbent main body includes an absorbent core and an absorbent core composed of a core wrap sheet that covers the absorbent core, and the third sheet member extends from the absorbent core in the absorbent main body in the longitudinal direction of the article. The pants-type absorbent article according to any one of <1> to <4>, wherein the pants-type absorbent article is joined to a side flap part having elasticity.
<6>
A center region located between the end regions, having end joint portions in which the two sheets are joined with an adhesive in the end regions located at both ends in the article longitudinal direction of the third sheet member In addition, there are a plurality of central joint portions in which two sheets are joined with an adhesive, and the end joint portions and the central joint portions are formed so as to extend in the article lateral direction Y, respectively. The width | variety W1 of a junction part is an underpants type absorbent article as described in any one of said <3>-<5> wider than the width W2 of a center junction part.
<7>
The width W2 of the central joint is preferably 0.5 mm or more, more preferably 1 mm or more, preferably 5 mm or less, more preferably 2 mm or less, and preferably 0.5 mm or more and 5 mm or less. The pants-type absorbent article according to <6>, which is preferably 1 mm or more and 2 mm or less.
<8>
The width W1 of the end joint is preferably 2 times or more, more preferably 4 times or more, preferably 40 times or less, more preferably 20 times or less, of the width W2 of the central joint 10. The underpants-type absorbent article according to <6> or <7>.
<9>
In the pants-type absorbent article according to any one of <6> to <8>, the region in which the contraction force is adjusted eliminates the central joint and cuts the thread-like elastic body in the region.

<10>
In the method of reducing the contraction force of the gradually increasing portion, the plurality of central joint portions in the third sheet member are left, and the thread-like elastic body is attached to a part of the plurality of regions of the adjacent central joint portions. The pants-type absorbent article according to any one of <6> to <8>, which is cut only in a region.
<11>
The gradually increasing portion of the third sheet member is any one of <1> to <10>, in which the lower edge portion approaches the lateral center line Ly of the article as it approaches the absorbent main body. Pants-type absorbent article.
<12>
The pants according to any one of <1> to <11>, wherein the gradually increasing portion of the third sheet member has at least a part thereof within a range of a distance from a side edge of the absorbent main body within 30 mm. Mold absorbent article.
<13>
<1> to <12>, wherein the length of the third sheet member in the longitudinal direction of the article gradually increases in the entire region between the side edge of the absorbent main body and the side seal portion. Pants-type absorbent article.
<14>
In the third sheet member, the distance Le in the article longitudinal direction X between the part having the maximum length in the article longitudinal direction X and the position having the smallest part in the article longitudinal direction is preferably 10 mm or more, more preferably 20 mm or more. Preferably, it is 150 mm or less, more preferably 100 mm or less, preferably 10 mm or more and 150 mm or less, and more preferably 20 mm or more and 100 mm or less, in any one of the above items <1> to <13> The underpants type absorbent article as described.
<15>
The length W6 in the article lateral direction Y of the region R2 for adjusting the contraction force in the third sheet member is the total length in the article lateral direction Y in the connected ventral sheet member or backside sheet member (between the pair of side seal portions). The same as the length), preferably 10% or more, more preferably 20% or more, preferably 80% or less, more preferably 70% or less, and preferably 10% or more and 80% or less. The pants-type absorbent article according to any one of <2> to <14>, more preferably 20% to 70%.
<16>
The length W6 in the article transverse direction Y of the region R2 for adjusting the contraction force in the third sheet member is preferably 80% with respect to the total length in the article transverse direction Y of the absorbent main body in the portion overlapping the third sheet member. More preferably, it is 90% or more, preferably 150% or less, more preferably 120% or less, preferably 80% or more and 150% or less, more preferably 90% or more and 120% or less. The pants-type absorbent article according to any one of <2> to <15>.
<17>
The length W6 in the article transverse direction Y of the region R2 for adjusting the contraction force in the third sheet member is preferably 95% with respect to the total length in the article transverse direction Y of the absorbent core in the portion overlapping the third sheet member. More preferably, it is 100% or more, preferably 175% or less, more preferably 145% or less, preferably 95% or more and 175% or less, more preferably 100% or more and 145% or less. The underpants-type absorbent article according to any one of <2> to <16>.
<18>
The pants-type absorbent article according to any one of the above <2> to <16>, wherein the third sheet member has its shrinking force added to a range overlapping with the absorbent main body and the adjacent portion is also lost. .
<19>
When the shrinkage force of the adjacent part disappears or decreases in addition to the range overlapping with the absorbent main body, the width W7 (length in the lateral direction of the article) of the adjacent part where the shrinkage force disappears or decreases is the side edge of the absorbent main body. Is preferably 5% or more, more preferably 10% or more, preferably 70% or less, more preferably 50% or less, and preferably 5% or more. The pants-type absorbent article according to any one of <2> to <18>, which is 70% or less, more preferably 10% or more and 50% or less.

<20>
The pants-type absorbent article according to any one of <1> to <19>, wherein the third sheet member is connected to each of the ventral sheet member and the back sheet member.
<21>
The ventral sheet member and the dorsal sheet member include an outer layer sheet forming the outer surface of the pant-type absorbent article, an inner layer sheet disposed on the inner surface side of the outer layer sheet, and a plurality of sheets disposed between both sheets. The pants-type absorbent article according to any one of <1> to <20>, comprising a thread-like elastic member.
<22>
Each of the ventral sheet member and the dorsal sheet member has a pair of side edge portions along the article longitudinal direction X, and has a pair of side seal portions joined to each other. The underpants-type absorbent article according to any one of <1> to <21>.
<23>
The pants-type absorbency according to any one of <1> to <22>, wherein the third sheet member is formed with the same length in the article lateral direction as the abdominal sheet member and the back sheet member. Goods.
<24>
In any one of the above items <1> to <23>, the pant-type absorbent article is a pants-type disposable diaper for infants or adults, a pants-type (shorts-type) sanitary napkin, or a pants-type incontinence pad. The underpants type absorbent article as described.

<25>
It is a manufacturing method of the underpants type absorbent article as described in said <1>,
Connecting a stretchable sheet used as a third sheet member to at least one of the continuum of the ventral sheet member and the continuum of the backside sheet member;
Pants comprising a step of extending the stretchable sheet used as the third sheet member partially in a direction corresponding to the longitudinal direction of the article in the flow direction, and superimposing the absorbent main body on the stretched portion. A method for manufacturing a mold absorbent article.
<26>
It is a manufacturing method of the underpants type absorbent article as described in said <2>,
The manufacturing method of the underpants type absorbent article as described in said <25> which comprises the contraction force adjustment process which lose | disappears or reduces the contraction force of the part which overlaps with the said absorbent core in the elastic sheet used as a 3rd sheet | seat member.
<27>
The method for producing a pants-type absorbent article according to <25> or <26>, wherein the stretchable sheet is stretched after being connected to the continuum of the ventral sheet member or the continuum of the dorsal sheet member. .
<28>
As the stretchable sheet, an adhesive is applied to one or both of a pair of belt-like sheets so that an end joint portion and a central joint portion are formed, and a thread-like elastic body is formed between the pair of belt-like sheets. The manufacturing method of the underpants type absorbent article according to any one of <25> to <27>, wherein the elastic sheet fixed in a state of being stretched in a direction intersecting the sheet conveyance direction is continuously manufactured.
<29>
The method for producing a pants-type absorbent article according to <27> or <28>, wherein the stretchable sheet is produced so as to have a region where a central joint portion does not exist intermittently in the longitudinal direction.
<30>
The stretch of the stretchable sheet is achieved by adsorbing one side of the side edge of the stretchable sheet to the first suction means, and the side of the part separated from the side edge in the direction perpendicular to the transport direction. The pant-type absorbent article according to any one of <25> to <29>, wherein the article is adsorbed by the second adsorbing means and then the interval between the first adsorbing means and the second adsorbing means is increased. Manufacturing method.

1 Pants-type disposable diapers (pants-type absorbent articles)
2A Abdominal sheet member 2B Back sheet member 22 Outer layer sheet 23 Inner layer sheet 2c Upper edge part 2d Lower edge part 3 Absorbent body 31 Top sheet 32 Back sheet 33 Absorbent core 4A, 4B Third sheet member 4c Upper edge part 4d Lower edge portion 4, 4 'Stretchable sheet R2 Area in which shrinkage force is adjusted 5,6 Sheet material 7 Threaded elastic body 9 End joint 10 Central joint

Claims (7)

An abdominal sheet member disposed on the wearer's ventral side, a dorsal sheet member disposed on the wearer's dorsal side, and an absorptive main body secured over the abdominal sheet member and the dorsal sheet member; A pants-type absorbent article having a waist opening and a pair of leg openings,
The ventral sheet member and the back sheet member have elasticity in the article lateral direction,
A third sheet member having elasticity in the longitudinal direction of the article in a state where the lower edge part of at least one of the abdominal sheet member and the back sheet member is extended from the lower edge part to the article lateral direction center line side. Are connected,
The third sheet member is joined to the absorbent main body in a state where a portion overlapping the absorbent main body is extended toward the center line of the article in the lateral direction, and in the vicinity of the absorbent main body, A pants-type absorbent article having a portion in which the length in the longitudinal direction of the article gradually increases as it approaches the main body.   The absorbent main body includes an absorbent core and an absorbent core composed of a core wrap sheet that covers the absorbent core, and the contraction force in the longitudinal direction of the article is adjusted so that the third core member does not contract the absorbent core. The pants-type absorbent article according to claim 1, wherein the region is provided.   The third sheet member is formed of an elastic sheet having two sheets and a plurality of elastic members fixed in an extended state between the two sheets, and the elastic members are oriented in the longitudinal direction of the article. Or the underpants type absorbent article of 2.   The absorbent main body includes an absorbent core and an absorbent core composed of a core wrap sheet that covers the absorbent core, and the third sheet member extends from the absorbent core in the absorbent main body in the longitudinal direction of the article. The pants-type absorbent article according to any one of claims 1 to 3, wherein the pants-type absorbent article is joined to a side flap part having elasticity. It is a manufacturing method of the underpants type absorbent article according to claim 1,
Connecting a stretchable sheet used as a third sheet member to at least one of the continuum of the ventral sheet member and the continuum of the backside sheet member;
Pants comprising a step of extending the stretchable sheet used as the third sheet member partially in a direction corresponding to the longitudinal direction of the article in the flow direction, and superimposing the absorbent main body on the stretched portion. A method for manufacturing a mold absorbent article. It is a manufacturing method of the underpants type absorbent article according to claim 2,
The manufacturing method of the underpants type absorbent article of Claim 5 which comprises the contraction force adjustment process which lose | disappears or reduces the contraction force of the part which overlaps with the said absorbent core in the elastic sheet used as a 3rd sheet | seat member. The method for producing a pant-type absorbent article according to claim 5 or 6, wherein the stretchable sheet is stretched after the stretchable sheet is connected to the continuum of the ventral sheet member or the continuum of the backside sheet member. .

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