JP5759703B2 - Pants-type absorbent article and manufacturing method thereof - Google Patents

Description

  The present invention relates to a pants-type absorbent article formed so that the ventral side does not touch and the back side fits the shape of the buttocks, and a method for manufacturing the same.

  Conventionally, as a pant-type absorbent article 50, as shown in FIG. 9, an absorbent main body 51 in which an absorbent body is interposed between a liquid-permeable surface sheet and a leak-proof sheet, and the absorbent main body 51 And at least the front body and the back body are formed, and the concave leg-around cut lines 53 and 53 for forming the leg openings are formed on the both sides of the middle as a whole. As shown in FIG. 10, the exterior sheet 52 is folded together with the absorbent main body 51 at a substantially central portion in the longitudinal direction, and the front body and the rear of the exterior sheet 52 are formed. It is known that a waist opening 55 and a pair of left and right leg openings 56, 56 are formed by joining the body to the side seals 54, 54 at both ends.

  Further, in Patent Document 1 below, in order to prevent side leakage from the waistside portion in a state of lying down sideways in a wide range, the front abdomen is made substantially the same width as the crotch, and both sides of the back part are widened. The both sides of the wide part are wound around the front abdomen, the side edges of the both sides and the side edges of the front abdomen are joined, leg holes are formed on both sides of the crotch, and A disposable pants-type diaper is disclosed in which a front abdomen and a back part are joined at portions other than the left and right waistside parts straddling the front abdomen and the back part.

  Furthermore, in the following Patent Document 2, in the disposable absorbent pants comprising the front body and the back body, a crotch notch is formed at the center of the lower end of the front body and the back body, and the crotch base that is the top of the crotch notch Disposable absorbent pants having leg inserts extending downwardly from the surface are disclosed. In such disposable absorbent pants, the liquid-absorbing panel is also located on the crotch base and the leg insertion portion, so that urine can be sufficiently absorbed in these regions.

JP 2008-142556 A Japanese Utility Model Publication No. 6-16404

  However, the conventional pant-type absorbent article 50 shown in FIGS. 9 and 10 is folded in the longitudinal direction at a substantially central portion in the longitudinal direction of the exterior sheet 52 so that the front body and the back body have substantially the same shape. As the area of the front body is too large, the abdominal side is stiffened and the back side is small, and the back side is pulled by the protrusion of the buttocks and becomes cramped. It did not fit. Thus, in the conventional absorbent article 50, the length of the crotch and the circumference of the waist are formed almost the same on the ventral side and the back side, so the front body is formed with a small area to reduce the abdominal side feeling. In this case, the back body also has a small area, and it is not possible to secure a sufficient area to cover the protrusion of the buttocks, and conversely, if you try to reduce the feeling of cramping on the back side, the feeling of abdominal side will be promoted There was a problem.

  Similarly, the disposable absorbent pants described in the above-mentioned Patent Document 1 are also formed with substantially the same shape at the front and back, so that the body may be worn on the abdomen or pulled on the back side by the protrusion of the buttocks when worn. It did not fit the shape of.

  On the other hand, the disposable pants-type diaper described in Patent Document 2 includes a laterally long portion composed of a back portion and both side portions on both sides thereof, and a crotch portion and a front abdomen portion extending from the central portion in the width direction to the front side. Since it is formed in a substantially T shape in plan view by the vertically long portion, there are many portions to be cut out from the continuous material, and the material loss is large.

  Further, in the manufacture of the disposable absorbent pants described in Patent Document 2, the manufacturing process is slow and unsuitable for high-speed manufacturing in the process of manufacturing the front body and the back body and then joining them.

  Then, the 1st subject of this invention is providing the underpants type absorbent article which the stomach side does not touch and a back side fits the shape of a buttocks. A second problem is to provide a method for manufacturing a pant-type absorbent article that can be manufactured at high speed with little material loss.

In order to solve the above-mentioned problem, the present invention according to claim 1 is composed of an absorbent main body including at least an absorbent body, and an exterior sheet integrally provided with the absorbent main body. A pants-type absorbent article in which a waist opening and a pair of left and right leg openings are formed by joining the front body and the back body at a predetermined edge,
The outer sheet has a pair of left and right side edges corresponding to the front-rear direction of the pants-type absorbent article and a pair of front-rear front-rear sides corresponding to the direction of the waist of the pants-type absorbent article in a plan view of the unfolded state. A substantially rectangular sheet defined by the edge is provided with a notch by notching the corners intersecting the left and right side edges at the front and rear side edges, and folding the sheet in the front and rear side edge direction, An edge of the notch formed on both sides of the front edge corresponding to the ventral side of the front and rear side edges and an edge of the notch formed on both sides of the rear edge corresponding to the back side, respectively It is made into a product state by joining along the edge,
The notches formed on both sides of the front side edge have a notch shape that is long in the front-rear side edge direction, and the notches formed on both sides of the rear side edge have a notch shape that is long in the left-right side edge direction. with that, pant-type absorbent article, wherein the length of the notch line is formed in substantially the same lengths are provided.

In the invention according to claim 1, as the exterior sheet, in a plan view in the unfolded state, a pair of left and right side edges corresponding to the front-rear direction of the pant-type absorbent article, and the waist-around direction of the pant-type absorbent article A substantially rectangular sheet defined by a pair of front and rear side edges corresponding to the front and rear side edges, the corners intersecting the left and right side edges at the front and rear side edges are cut out to provide notches, Folded in the front-rear side edge direction, the notches formed on both sides of the front edge corresponding to the ventral side of the front-rear side edge and the rear edge corresponding to the back side formed on both sides of the notch The product is in a product state by joining the edges of the notches along the edges. And the notch part formed in the both sides of the said front side edge is made into the notch shape long in the front-back side edge direction (waist circumference direction), and the notch part formed in the both sides of the said back side edge is the left-right side edge direction A notch shape that is long in the (vertical direction) is formed, and the length of the notch line is formed to be approximately the same length . That is, the front edge cutout is formed in a shape that reduces the front body area, and the rear edge cutout is formed in a shape that increases the back body area, thereby creating a three-dimensional cutting shape. The abdomen abutment part is rounded up and the abdomen abutment part can be tightened. Can be prevented. For this reason, it fits to the shape of the body and can prevent leakage of body fluids.

  Moreover, since the exterior sheet | seat is set as the shape which provided the predetermined notch part in the four corners of a substantially rectangular sheet | seat, there are few cut-out parts and it can reduce material loss.

As this invention which concerns on Claim 2 , while the said exterior sheet | seat reaches from the notch part formed in the both sides of the said back side edge to the right-and-left side edge on the opposite side, respectively, it is mutually in the waist circumference direction center part on the back side. The elastic elastic member for the back side which intersects, and the elastic elastic member for the ventral side which extends in the front side edge direction from the right and left side edge of one side among the right and left side edges, and reaches the right and left side edge of the other side. 1 Symbol placement of pant-type absorbent article is provided.

In the invention according to the second aspect , the outer sheet has a notch portion formed on both sides of the rear side edge to the left and right side edges on the opposite side, respectively, and at the center part in the waist-circumferential direction on the back side. A crossing back elastic elastic member, and an abdominal elastic elastic member extending in the front edge direction from one of the left and right edges to the left and right edges of the other side. It is. The dorsal elastic elastic member lifts the dorsal exterior sheet to fit the roundness of the buttocks and intersects with the dorsal waist around the center of the dough. It will be difficult to fit and fit. Further, the belly side elastic stretchable member fits around the abdomen, so that the feeling of tackiness on the belly side can be further reduced.

According to a third aspect of the present invention, the absorbent main body is capable of contracting in response to contraction of the elastic elastic member, and is a portion that overlaps the elastic elastic member so as to be substantially rectangular after the elastic elastic member contracts. A pant-type absorbent article according to claim 2, wherein is formed wide.

In the invention described in claim 3 , the absorbent main body can be contracted in accordance with the contraction of the elastic expansion / contraction member, and is integrated with the exterior sheet in the stretched state of the elastic expansion / contraction member, and becomes substantially rectangular after the contraction of the elastic expansion / contraction member. As described above, by forming the portion that overlaps the elastic elastic member broadly, the absorbent main body also expands / contracts according to the expansion / contraction state of the exterior sheet, so that it can follow the movement of the body and reduce the feeling of stickiness and tension become able to.

The present invention according to claim 4 is a method for producing a pants-type absorbent article according to any one of claims 2 and 3 ,
A step of feeding a continuous sheet having a width dimension between the front and rear side edges into a line, a step of arranging the elastic elastic member for the back side and the elastic elastic member for the abdomen on the continuous sheet, and a step of forming the notch Joining the edge of the notch formed on both sides of the front edge and the edge of the notch formed on both sides of the rear edge along the edge, respectively, and the cutting schedule The manufacturing method of the underpants type absorbent article characterized by comprising the process cut | judging by a part is provided.

In the invention according to claim 4, the continuous sheet having a width dimension between the front and rear side edges is fed out to the line, and the back elastic elastic member for the back side and the elastic elastic member for the abdominal side are disposed on the continuous sheet; The step of forming the notch, and the edge of the notch formed on both sides of the front edge and the edge of the notch formed on both sides of the rear edge along the edge respectively. By comprising the process of joining and the process of cutting by the said cutting scheduled part, the material loss of an exterior sheet is few and high-speed manufacture by line production is attained.

  As described above in detail, according to the present invention, it is possible to provide a pant-type absorbent article that does not touch the stomach side and fits the shape of the buttock on the back side. In addition, it is possible to provide a method for manufacturing a pants-type absorbent article that can be manufactured at high speed with little material loss.

It is a top view of the unfolding state which shows the underpants type napkin 1 which concerns on this invention. It is an assembly drawing in the unfolded state. 2 is a partially broken plan view of the absorbent main body 10. FIG. It is a perspective view of the product state which shows the underpants type napkin 1. FIG. It is a side view of the circumference of a human body. The assembling procedure of the exterior sheet 20 is shown, (A) is a schematic view, and (B) is a plan view of the relevant part. 3 is a plan view showing a manufacturing process (No. 1) of the exterior sheet 20. FIG. 6 is a plan view showing a manufacturing process (No. 2) of the exterior sheet 20. FIG. It is a top view of the unfolding state which shows the conventional absorbent article 50. It is a front view of the product state which shows the conventional absorbent article 50.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 and 2, the pant-type napkin 1 is provided integrally with an absorbent main body 10 including at least an absorbent body 13 such as cotton-like pulp and an outer surface side of the absorbent main body 10. The waist opening W and the pair of left and right leg openings L, L are formed by joining the front body and the back body of the exterior sheet 20 at predetermined edges in the product state. It is a pants-type structure.

  Hereinafter, it demonstrates in order of the manufacturing method of the said absorptive main body 10, the exterior sheet | seat 20, and the underpants type napkin 1. FIG.

(Structure of the absorbent main body 10)
First, an example of the structure of the absorbent main body 10 will be described in detail with reference to FIG. The absorbent main body 10 absorbs and retains body fluids, and an absorbent body 13 such as cotton-like pulp is interposed between a liquid-permeable surface sheet 11 made of nonwoven fabric or the like and a leak-proof sheet 12 made of polyethylene or the like. A structure having a different structure can be used.

  As the absorbent main body 10, one having stretchability in a plane is suitably used. As will be described in detail later, since the exterior sheet 20 to which the absorbent main body 10 is integrally joined has elasticity, it is difficult to follow the movement of the body when the non-stretchable absorbent main body is attached. Even if the absorbent main body is mokomoko, a feeling of rattling is caused and causes leakage, but by attaching the stretchable absorbent main body 10, it becomes possible to prevent the feeling of rattling and leakage even if following the body. As the absorbent main body 10 having such stretchability, a hydrophilic long fiber crimped between two stretchable sheets is interposed (Japanese Patent Laid-Open No. 2006-198396), stretchability Absorbed in a base sheet having a plurality of independent absorbent parts fixed individually (Japanese Patent Laid-Open No. 2009-136498), or in a non-joined part between two stretchable sheets joined in a line at an appropriate interval A material in which a material is interposed (Japanese Patent Laid-Open No. 6-209966) can be used.

  It is preferable that the absorbent main body 10 is formed to have a wide portion overlapping the elastic elastic members 30 and 31 so that the elastic main body 10 becomes substantially rectangular after the elastic elastic members 30 and 31 of the exterior sheet 20 described in detail later. . In the illustrated example, both sides of the back side where the elastic elastic member 30 for the back side crosses and intersects at the overlapping portion with the absorbent main body 10 are greatly curved and formed wide, and one of the elastic elastic members 31 for the abdominal side is formed. Both sides of the abdominal side where the section crosses are slightly curved and formed wide.

  As said liquid-permeable surface sheet 11, what has elasticity, such as a perforated or non-porous nonwoven fabric and a porous plastic sheet, is used suitably. 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.

  As the leak-proof sheet 12, a liquid-impervious plastic sheet having elasticity such as polyethylene or polypropylene is preferably used, but in recent years, a sheet having moisture permeability is used from the viewpoint of preventing stuffiness. 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.

(Structure of exterior sheet 20)
Next, as shown in FIG. 2 , the exterior sheet 20 is a two-layer nonwoven fabric sheet composed of an upper nonwoven fabric 21 and a lower nonwoven fabric 22, and an elastic stretch member is disposed between the upper nonwoven fabric 21 and the lower nonwoven fabric 22. In addition, elasticity is given.

  The exterior sheet 20 according to the present invention has a pair of left and right side edges 23 and 23 corresponding to the front-rear direction of the pant-type napkin 1 and a front-rear pair corresponding to the direction of the waist of the pant-type napkin 1 in a plan view in an unfolded state. The front and rear side edges 24 and 25 are cut out at the corners intersecting the left and right side edges 23 and 23, respectively, in a substantially rectangular sheet defined by the front and rear side edges (the front side edge 24 and the rear side edge 25). In this structure, the notches 26 and 27 are provided. Further, as shown in FIG. 4, the outer sheet 20 is folded in the front-rear side edge direction at substantially the center position of the left and right side edges 23, 23 where the notches 26, 27 are not formed, A product state is obtained by joining the edges of the notches 26 and 26 formed on both sides and the edges of the notches 27 and 27 formed on both sides of the rear edge 25 along the edges. ing. At this time, the notches 26, 26 formed on both sides of the front edge 24 and the notches 27, 27 formed on both sides of the rear edge 25 are formed in different shapes, and the length of the notch line is long. 4 (the edge length forming the notch) is formed with substantially the same length. Therefore, when the product is in a product state, the ventral area is small and the back is small as shown in FIG. Since the area on the side can be made large, it can be prevented that the ventral side is stuck and the back side is pulled by the protrusion of the buttocks and cramped, the ventral side and the back side are the body Fit the shape. For this reason, leakage of body fluid can also be prevented.

  The upper layer nonwoven fabric 21 and the lower layer nonwoven fabric 22 are made of synthetic fibers such as polyethylene, polyethylene terephthalate and polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton and pulp. Nonwoven fabrics and woven fabrics that can be used can be used, but in particular, in order to prevent stuffiness, it is preferable to use a material that suppresses basis weight and has excellent air permeability. Moreover, it is preferable that the lower layer nonwoven fabric 22 which becomes the outer surface side has higher hydrophobicity than the upper layer nonwoven fabric 21 which becomes the inner surface side. Furthermore, it is preferable that the upper layer nonwoven fabric 21 and the lower layer nonwoven fabric 22 are ones in which the sheet itself has stretchability or crimpability, or a stretched stretched material is bonded. As the stretchable material, a stretchable material made of latex, urethane, or olefin fiber is preferably used. In addition, stretchability may be imparted by printing a material that shrinks by post-processing and becomes stretchable in a wavy shape.

  As shown in FIG. 1, the specific shape of the notches 26 and 27 is such that the notches 26 and 26 formed on both sides of the front edge 24 have a notch shape that is long in the left and right edges. The notches 27 and 27 formed on both sides of the side edge 25 have a notch shape that is long in the front-rear side edge direction. Accordingly, in the product state in which the edges of the notches 26 and 27 are joined to each other, the front edge 24 is formed relatively short on the abdominal side, and the notch into the inside of the notch 26 is shallow. While it is formed in a narrow area in the circumferential direction and the front-rear direction, the rear side edge 25 is formed relatively long on the back side, and the notch 27 is deeply cut inward, so that it is wide in the waist circumferential direction and the front-rear direction. It will be formed by area. In the example shown in FIG. 1, the notches 26 formed on both sides of the front edge 24 are curved inwardly by an elliptical quarter outline having a major axis in the front-rear edge direction (waist-around direction). The notch portions 27 formed on the both sides of the rear edge 25 are aligned with an ellipse having the same shape as the notch portion 26 so that the left and right edge directions (vertical direction) are the major axes. It is formed with a curved line that is convex inward by four outlines. In addition, the said notch part may form either a ventral | abdominal side or a back | dorsal side linearly.

  By joining the edges of the notches 26 and 27, a waist opening W is formed by the front edge 24 and the rear edge 25, and a pair of left and right leg openings are formed by the left and right edges 23 and 23. L is formed. The exterior sheet 20 is folded in the front-rear direction along a fold line S passing through substantially the center of the left and right side edges 23, 23. The lengths 1a to 1f of the respective parts at this time correspond to the developed state (FIG. 1) and the product state (FIG. 4) as indicated by the symbols in each figure.

  The underpants-type napkin 1 is mounted from the fold line S to the front edge 24 by wearing the pants-type napkin 1 in a state in which the front-rear direction center line C of the crotch part of the human body shown in FIG. The length 1f <the length 1e from the fold line S to the rear edge 25, the length 1c of the front edge 24 <the length 1a of the rear edge 25, and the lengths of the human body shown in FIG. The relationship corresponds to 1f, 1e, 1a, 1c. For this reason, it can always be worn while being fitted to the body.

  Then, the elastic elastic member arrange | positioned between the upper layer nonwoven fabric 21 and the lower layer nonwoven fabric 22 is demonstrated. The exterior sheet 20 includes notches 27 and 27 formed on both sides of the rear edge 25 to the opposite left and right edges 23 and crosses each other at the center of the back side in the waist direction. The elastic elastic member 30 for the side, the elastic elastic member 31 for the ventral side extending from the left and right side edges 23 of the left and right side edges 23 and 23 in the direction of the front side edge 24 and reaching the left and right side edges 23 on the other side, and the front side There are provided waist elastic elastic members 32 disposed in the waist direction of the edge 24 and the rear edge 25. The elastic elastic members arranged in the same direction have a plurality of thread rubbers arranged at intervals. Moreover, although the elastic elastic member uses thread rubber in the illustrated example, for example, a tape-like elastic member may be used.

  The elastic elastic member 30 for the back side includes notches 27 and 27 formed on both sides of the rear edge 25, and the left and right edges on the opposite side from the range of the notch 27 on the one side substantially closer to the back side. In the same manner as the first elastic elastic member 30A for the back side, which is arranged in a smooth curved shape that curves from a convex curve on the dorsal side to a convex curve on the ventral side toward the ventral side of 23. Smoothly inflection from a convex curve on the dorsal side to a convex curve on the ventral side from the range of the notch portion 27 on the other side to the range on the ventral side of the left and right side edges 23 on the opposite side. A second elastic elastic member for back side 30B arranged in a curved shape, and the first elastic elastic member for back side 30A and the second elastic elastic member for back side 30B around the waist around the back side It is arrange | positioned so that it may cover in X shape from a leg periphery. Since the first elastic elastic member 30A for the back side and the second elastic elastic member 30B for the back side intersect at the central portion in the direction of the waist on the back side, the lifting force at the central portion on the back side becomes large, The absorptive main body 10 can be inserted into the groove of the buttocks. Since the elastic elastic member 30 for the back side is disposed up to the left and right side edges 23, the leg periphery can be expanded and contracted vertically and horizontally, and the detachability and fit of the pant-type napkin 1 are improved.

  The elastic elastic member 31 for the ventral side extends from the range near the back side of the left and right side edges 23 on the one side toward the front side edge 24, curves in the vicinity of the front side edge 24, and is on the back side of the left and right side edges 23 on the other side. It is arranged in a smooth curved shape that continues to the close range. The elastic elastic member 31 for the abdomen is mainly for improving the fit of the wearer on the abdomen side and preventing the feeling of rattling on the abdomen side. Further, by arranging up to the left and right side edges 23, the leg periphery can be expanded and contracted vertically and horizontally, the detachability and fit of the pant-type napkin 1 are improved, and the dorsal side is provided in the region corresponding to the base of the leg. Since the elastic elastic member 30 is disposed so as to intersect, the fitting property of the base portion of the leg is improved and leakage can be prevented.

  The elastic elastic member 32 for waist circumference is arranged along the horizontal direction with a space in the vertical direction between the edges of the front cutout portions 26, 26, and the rear cutout portions 27, 27. These are arranged along the horizontal direction with a space in the vertical direction between the edges.

(Manufacturing method of the pants-type napkin 1)
Next, the manufacturing method of the underpants type napkin 1 is demonstrated based on FIGS. First, as shown in FIG. 6, the continuous sheet of the upper layer nonwoven fabric 21 and the continuous sheet of the lower layer nonwoven fabric 22 each having a width dimension between the front and rear side edges 24 and 25 are respectively supplied to the upper side and the lower side of the nip roller portion 40. Further, the elastic elastic member 30 for the back side, the elastic elastic member 31 for the abdominal side, and the elastic elastic member 32 for waist circumference are supplied between these continuous sheets, and the upper nonwoven fabric 21 and the lower nonwoven fabric 22 are continuously joined.

  Here, while the elastic elastic member 32 for waist circumference is linearly introduced along the line direction on both sides of the continuous sheet, the elastic elastic member 30 for the back side and the elastic elastic member 31 for the ventral side are Then, it is introduced into the nip roller unit 40 while being meandered in a curved shape by a known traverse device 41. The traverse device 41 has a holding portion for the elastic elastic member 30 for the back side and the elastic elastic member 31 for the abdominal side at the tip part, and by performing the advance and retreat in the width direction of the continuous sheet at the calculated speed, The elastic elastic members 30 and 31 are arranged in a predetermined curved shape.

  The elastic elastic member 30 for the back side is a first elastic elastic member 30A for the back side that extends from the vicinity of one side in the width direction of the continuous sheet to the middle portion in the width direction between the cut lines K, K of the exterior sheet 20. And a second elastic elastic member 30B for the back side extending from the intermediate portion in the width direction of the continuous sheet to the vicinity of the one side width direction end. The elastic elastic members 30A and 30B are arranged in a continuous wave shape with a half cycle between the cutting lines K and K, respectively. That is, the two elastic elastic members 30A and 30B have the same period and amplitude and are arranged in a wavy curve with the phase shifted by 180 °.

  The abdomen elastic elastic member 31 extends from the width direction intermediate part of the continuous sheet to the vicinity of the other side width direction end between the cutting lines K, K of the exterior sheet 20, curves, and again returns to the width direction intermediate part. It is arranged in a continuous wave pattern that is repeated on a continuous sheet with this as one cycle.

  The elastic elastic member 30 for the back side, the elastic elastic member 31 for the abdomen, and the elastic elastic member 32 for the waist are fixed to the continuous sheet by the peripheral surface coating device 42. The hot melt adhesive is applied to the nip roller section 40.

  Subsequently, if a continuous sheet in which the upper layer nonwoven fabric 21 and the lower layer nonwoven fabric 22 are joined is manufactured, after the absorbent main body 10 is joined to a predetermined position on the upper surface side of the upper layer nonwoven fabric 21, as shown in FIG. Cutout portions 26 and 27 are formed at the four corners of the exterior sheet 20. The notches 26 and 27 are cut across the planned cutting line K in a shape integrated with continuous front and rear notches.

  Thereafter, the continuous sheet is folded back in the line width direction, and the edges of the notches 26 and 27 facing each other are joined along the edges by ultrasonic bonding or heat seal bonding.

  After that, the product is cut along the cutting line K, and the pants-type napkin 1 in the product state is completed.

  DESCRIPTION OF SYMBOLS 1 ... Pants type napkin, 10 ... Absorbent main body, 11 ... Liquid-permeable surface sheet, 12 ... Leak-proof sheet, 13 ... Absorber, 20 ... Exterior sheet, 21 ... Upper layer nonwoven fabric, 22 ... Lower layer nonwoven fabric, 23 ... Left and right side Edges, 24 ... front side edges, 25 ... rear side edges, 26 and 27 ... notches, 30 ... elastic elastic members for the dorsal side, 31 ... elastic elastic members for the ventral side, 32 ... elastic elastic members for around the waist

Claims (4)

It is composed of an absorbent main body including at least an absorbent body and an exterior sheet integrally provided with the absorbent main body, and the front body and the rear body of the exterior sheet are joined at predetermined edges in a product state. A pants-type absorbent article in which a waist opening and a pair of left and right leg openings are formed,
The outer sheet has a pair of left and right side edges corresponding to the front-rear direction of the pants-type absorbent article and a pair of front-rear front-rear sides corresponding to the direction of the waist of the pants-type absorbent article in a plan view of the unfolded state. A substantially rectangular sheet defined by the edge is provided with a notch by notching the corners intersecting the left and right side edges at the front and rear side edges, and folding the sheet in the front and rear side edge direction, An edge of the notch formed on both sides of the front edge corresponding to the ventral side of the front and rear side edges and an edge of the notch formed on both sides of the rear edge corresponding to the back side, respectively It is made into a product state by joining along the edge,
The notches formed on both sides of the front side edge have a notch shape that is long in the front-rear side edge direction, and the notches formed on both sides of the rear side edge have a notch shape that is long in the left-right side edge direction. with that, pant-type absorbent article, wherein the length of the notch line is formed at substantially the same length. The exterior sheet extends from a notch formed on both sides of the rear side edge to the left and right side edges on the opposite side, and intersects with each other at the center part in the direction of the waist on the back side. , one side of left and right extending from the side edge to the front edge direction, the other side of the right and left side pant-type absorbent article of claim 1 Symbol placement and an elastically stretchable member for a ventral reaching the edges of the right and left side edges . The said absorptive main body can be contracted according to contraction of the elastic elastic member, and a portion overlapping with the elastic elastic member is formed wide so that the elastic main member becomes substantially rectangular after the elastic elastic member contracts. 2. The pant-type absorbent article according to 2. It is a manufacturing method of the underpants type absorptive article according to any one of claims 2 and 3 ,
A step of feeding a continuous sheet having a width dimension between the front and rear side edges into a line, a step of arranging the elastic elastic member for the back side and the elastic elastic member for the abdomen on the continuous sheet, and a step of forming the notch Joining the edge of the notch formed on both sides of the front edge and the edge of the notch formed on both sides of the rear edge along the edge, respectively, and the cutting schedule A method for producing a pants-type absorbent article, comprising a step of cutting at a section.

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