TW202335653A - Absorbent article - Google Patents

Abstract

Provided is an absorbent article (1) having an up/down direction, a left/right direction, and a front/back direction which are mutually orthogonal, and having a crotch part and waist parts which comprise a one-side waist part (20) and an other-side waist part (30). The absorbent article (1) is characterized in that: the ends of the one-side waist part (20) and the other-side waist part (30) on at least one side in the left/right direction are joined at a joining section (2a, 2b) and have a securing part (5); the base end section of the securing part (5) is fixed to the waist parts (20, 30) by a fixing part (F1); a leading end section of the securing part (5) has an engaging part (51) that detachably engages with non-skin side surfaces of the waist parts (20, 30); and at least a portion of the fixing part (F1) is also a cutting guide section when cutting at least a portion of the waist parts.

Description

absorbent articles

The present invention relates to absorbent articles.

Conventionally, there has been known a disposable diaper such as Patent Document 1, which can be used as an open-type so-called adhesive-type diaper by cutting off a predetermined portion of a so-called panty-type diaper that has been connected in an annular shape around the waist. . [Prior technical literature] [Patent Document]

[Patent Document 1] Japanese Patent Application Laid-Open No. 5-317356

[Problem to be solved by the invention]

The problem to be solved by the present invention is at least one of the following first problem or second problem. In the first problem, the disposable diaper of Patent Document 1 has: a binding sheet that can be joined on the front side, a joining portion that joins the side portions of the front side and the rear side into one body, and a tear-off device close to the joining portion. It is a split-line-shaped cutting line, but it is expected to be a disposable diaper that can cut the front side (back side) of the body with a simpler process.

The present invention has been accomplished in view of the above-mentioned conventional problems, and an object thereof is to provide an absorbent article that eliminates the need to separately provide a fixing portion and a cutting guide portion for fixing the joint portion.

In the second problem, the disposable diaper of Patent Document 1 has: a binding sheet that can be joined on the front side, a joining portion that joins the side portions of the front side and the rear side into one body, and a tear-off device close to the joining portion. It is a tear-shaped cutting line. However, during the manufacturing stage, distribution stage, pre-wearing stage, or the stage of wearing panty-type diapers, the front side of the body may be accidentally cut off due to the tearing line formed by the cutting line. The danger of cutting away from behind.

The present invention was completed in view of the above-mentioned conventional problems, and its object is to provide absorbent articles that reduce the risk of being torn apart against the intention of the wearer or the like. [Technical means to solve problems]

The main invention to achieve the above-mentioned first subject is an absorbent article which has an up-down direction, a left-right direction, and a front-back direction that are orthogonal to each other, and has a waist periphery including a waist periphery on one side and a waist periphery on the other side. and a lower span portion, characterized in that the one-side waist peripheral portion and the other-side waist peripheral portion are joined by a joint portion at at least one end in the left-right direction, and have a joint portion, and the joint portion The base end portion is fixed to the waist peripheral portion with a fixing portion. The front end portion of the connecting portion has an engaging portion that is detachably engaged with the non-skin side of the waist peripheral portion. At least a part of the fixing portion , is also a cutting guide portion when cutting at least a part of the waist peripheral portion.

The main invention to achieve the above-mentioned second subject is an absorbent article which has an up-down direction, a left-right direction, and a front-back direction that are orthogonal to each other, and has a waist periphery including a waist periphery on one side and a waist periphery on the other side. part, and a lower span part, characterized in that the two side ends of the one side waist peripheral part and the other side waist peripheral part are joined by joint parts respectively, and have a joint part, and the base end part of the joint part is connected. In the waist peripheral portion, the front end portion of the connecting portion has an engaging portion detachably engaged with the non-skin side of the waist peripheral portion on one side, and the waist peripheral portion has at least one end of the waist peripheral portion when cutting the waist peripheral portion. A portion of the cutting guide portion is provided at a position different from the joining portion provided at the front end portions of both sides in the left-right direction, and the cutting guide portion is used to connect the waist peripheral portion. A melting portion that is at least partially melted.

Other features of the present invention are disclosed in this specification and the accompanying drawings. [Effects of the invention]

The present invention has the effect of solving the first problem by providing an absorbent article that does not require separate fixing portions and cutting guide portions.

As an effect of the present invention on the second problem, it is possible to provide an absorbent article that reduces the risk of being torn apart against the intention of the wearer or the like.

From the description of this specification and the attached drawings, at least the following matters can be understood. An absorbent article has vertical directions, left-right directions, and front-back directions that are orthogonal to each other, and has a waist peripheral portion including a waist peripheral portion on one side and a waist peripheral portion on the other side, and a cross-down portion, wherein the one side is characterized by The side waist peripheral portion and the other side waist peripheral portion are joined at least on one side in the left-right direction by a joint portion, and have a joint portion, and the base end portion of the joint portion is fixed with a fixing portion. The waist peripheral portion and the front end portion of the connecting portion have an engaging portion that is detachably engaged with the non-skin side of the waist peripheral portion, and at least a part of the fixing portion is also used to cut at least a portion of the waist peripheral portion. Cutting guide part on occasion.

According to this absorbent article, it is not necessary to separately provide the fixing part and the cutting guide part, so it is possible to provide an absorbent article in which the manufacturing process is simplified.

In this absorbent article, when the absorbent article is viewed from the waist peripheral portion side of the one side in the front-rear direction, the coupling portion is in an adjacent region adjacent to the fixing portion from the front end portion side of the coupling portion. The minimum weight per unit area is preferably greater than the maximum weight per unit area of the aforementioned waist periphery.

According to this type of absorbent article, the waist peripheral portion can be separated more easily than the joint portion at the cutting guide portion, and the joint portion can be easily engaged at the separated waist peripheral portions to form an absorbent article in which the waist peripheral opening can be formed.

In this absorbent article, the waist peripheral portion is formed of one or a plurality of waist peripheral sheet members, and the joining portion is formed of one or a plurality of joining portion sheet members. When the absorbent article is viewed from the waist peripheral side, the minimum weight per unit area of the one or plurality of joining portion sheet members in the adjacent area adjacent to the fixing portion from the front end side of the joining portion is: It is preferable that the weight per unit area is greater than the maximum weight per unit area of one or more waist peripheral sheet members.

According to this absorbent article, in the fixed portion, the minimum weight per unit area of the joint portion sheet member is smaller than the maximum weight per unit area of the waist periphery sheet member, causing the waist periphery sheet member to be smaller than the joint unit. The lower sheet member is also easily cut by the cutting guide portion, and it is easy to form an absorbent article in which a waist peripheral opening can be formed by engaging the coupling portion at the waist peripheral portion separated by cutting.

In this absorbent article, among the cutting guide portions, the end of the coupling portion closest to the front end portion is the starting point of the cutting guide, and the cutting guide portion has: from the side closest to the front end portion The end portion is preferably an inclined portion that is inclined toward the aforementioned base end side and with respect to the aforementioned up-down direction.

According to this absorbent article, when a cutting force is applied to the cutting guide portion, the force is easily concentrated at the cutting guide starting point, and the applied force is transmitted from the cutting guide starting point to the inclined portion, thereby making it easier to follow the cutting guide portion. Cut the shape of the guide portion to cut the waist peripheral portion.

In this absorbent article, among the cutting guide portions, the end of the coupling portion closest to the front end portion is the starting point of the cutting guide, and the cutting guide portion has: from the side closest to the front end portion Preferably, the upper inclined portion is inclined toward the upper side and the base end side, and the lower inclined portion is inclined toward the lower side and the base end side from the end closest to the front end side.

According to this absorbent article, when a cutting force is applied to the cutting guide portion, the force is easily concentrated at the cutting guide starting point, and the applied force is easily transmitted from the cutting guide starting point to the upper inclined portion and the lower inclined portion. , and easy to cut off.

In this absorbent article, among the angles between the upper inclined portion and the lower inclined portion, it is preferable that the angle in the left-right direction toward the base end portion is an obtuse angle.

According to this absorbent article, it can be easily cut by the cutting guide portion inclined from the cutting guide starting point, and the angle between the upper inclined portion and the lower inclined portion on the base end side is an acute angle compared to the case where , the length of the cutting guide portion in the left-right direction can be shortened.

In this absorbent article, among the angles between the upper inclined portion and the lower inclined portion, it is preferable that the angle in the left-right direction toward the base end portion is an acute angle.

According to this absorbent article, compared with the case where the angle between the upper slope portion and the lower slope portion on the base end side is an obtuse angle, when a cutting force is applied to the cutting guide portion, it is easier to concentrate the cutting force on the cutting guide portion. The force for cutting the guide starting point is transmitted to the upper inclined portion and the lower inclined portion, making it easy to cut the cutting guide portion.

In this absorbent article, it is preferable that the absorbent article has an absorbent core that absorbs liquid, and that the cutting guide starting point is located on one side of the absorbent core in the left-right direction.

According to this kind of absorbent article, the absorbent core is a part with high rigidity and is not easily torn. Therefore, the waist peripheral portion is cut on one side in the left-right direction further than the absorbent core, thereby making it easier to cut the waist peripheral portion. department.

In this absorbent article, it is preferable that the cutting guide starting point overlaps the engaging portion in the up-down direction.

According to this absorbent article, when cutting with the cutting guide, the engaging portion of the connecting portion is often grasped, so the force applied to the connecting portion is easily transmitted to the starting point of the cutting guide, and the cutting guide is easily used. Part to cut off.

In this absorbent article, it is preferable that the cutting guide portion is continuous from the upper end to the lower end of the waist peripheral portion where the fixing portion is provided in the up-down direction.

According to this absorbent article, it is easy to cut the waist peripheral portion along the cutting guide portion.

This absorbent article has an auxiliary fixing portion that assists in fixing the connecting portion and the waist peripheral portion provided with the fixing portion, and the auxiliary fixing portion is located closer to the connecting portion than the cutting guide portion. The proximal end side of the portion is preferably arranged at intervals in the up-down direction.

According to this absorbent article, the auxiliary fixing portion strengthens the fixation of the waist peripheral portion by the connecting portion, and by arranging the auxiliary fixing portions at intervals, the risk of cutting the waist peripheral portion using the auxiliary fixing portion as a starting point can be reduced.

In this absorbent article, in the coupling portion, the maximum length in the left-right direction from the fixing portion to the end on the front end side is longer than the length from the fixing portion to the end on the base end side. It is better that the maximum length in the left-right direction is longer.

According to this absorbent article, the maximum length in the left-right direction from the fixed portion to the end on the front end side is shorter than the maximum length in the left-right direction from the fixed portion to the end on the base end side. In this case, since it is relatively easy to grasp the part on the front end side of the coupling part, it is easy to operate the coupling part such as cutting off the waist peripheral part or engaging the engaging part.

In this absorbent article, it is preferable that the cutting guide portion is a welding portion that welds the waist peripheral portion and the joining portion.

According to this absorbent article, since the cutting guide portion is a welded portion, the risk of the waist peripheral portion being accidentally torn by the cutting guide portion against the intention can be reduced.

In this absorbent article, the melting point of the member closest to the joining portion in the front-rear direction among the waist peripheral portions in the front-rear direction is higher than the melting point of the member closest to the joining portion in the front-rear direction. It is better for the melting point of the components around the waist to be lower.

According to this kind of absorbent article, when welded, the material with a lower melting point melts more easily, so that the waist peripheral portion with a lower melting point becomes easier to melt, thereby making the cutting guide portion and the waist peripheral portion more easily melted. The member on the joint side melts easily, making it easy to cut off the waist periphery.

This absorbent article has an absorbent core that absorbs liquid, the joining portion is fixed to the waist peripheral portion on one side by the fixing portion, and the cutting guide portion is provided between the joining portion and the left-right direction. Preferably between the aforementioned absorbent cores.

According to this kind of absorbent article, the absorbent core is a part with high rigidity and is not easily torn. Therefore, the waist peripheral portion is cut on one side in the left-right direction further than the absorbent core, thereby making it easier to cut the waist peripheral portion. department.

In this absorbent article, it is preferable that all of the fixing parts are the cutting guide parts.

According to this absorbent article, cutting along the waist peripheral portion of the fixing portion can be easily performed.

In this absorbent article, in the waist peripheral portion provided with the fixing portion, a portion at a predetermined distance from the cutting guide portion toward the front end side of the coupling portion is such that the waist peripheral portion does not move in the left-right direction. Flexible non-flexible areas are preferred.

According to this absorbent article, it is possible to prevent the waist peripheral portion from elongating due to the force applied when cutting the waist peripheral portion, so it is easy to apply the force for cutting the waist peripheral portion to the cutting guide portion.

In this absorbent article, it is preferable that the adhesive agent is coated on the waist peripheral portion provided with the fixing portion at a predetermined distance from the cutting guide portion toward the front end portion of the joining portion.

According to this absorbent article, the rigidity of the waist peripheral portion is increased compared with the case where the adhesive agent is not applied, so it is easy to apply a force for cutting the waist peripheral portion to the cutting guide portion.

According to the description of this specification and the accompanying drawings, an absorbent article has an up-down direction, a left-right direction, and a front-back direction that are orthogonal to each other, and has a waist peripheral portion including a waist peripheral portion on one side and a waist peripheral portion on the other side, and a lower span part, characterized in that the two side ends of the one side waist peripheral part and the other side waist peripheral part are respectively joined with joint parts, and have a joint part, and the base end part of the above joint part is connected to the above mentioned In the waist peripheral portion, the front end portion of the aforementioned coupling portion has an engaging portion that is detachably engaged with the non-skin side of the waist peripheral portion on one side, and the aforementioned waist peripheral portion has an engaging portion that cuts at least a portion of the waist peripheral portion. The actual cutting guide portion is provided at a position different from the joining portion provided at the two side ends in the left-right direction, and the cutting guide portion is such that at least a part of the waist peripheral portion The melting part of the melt.

According to this absorbent article, since the melting portion is a cutting guide portion, the risk of unintentional tearing can be reduced.

In this absorbent article, the waist peripheral portion is provided with a plurality of auxiliary melting portions, and the waist peripheral portion cut using the cutting guide portion is configured such that the engaging portion is engaged with the one waist peripheral portion. The non-skin side of the part can thereby form a waist peripheral opening. The plurality of auxiliary melting parts are located closer to the base end of the connecting part than the cutting guide part in the direction along the waist peripheral opening. It is preferable that the plurality of auxiliary melting parts melt at least a part of the waist peripheral part and are spaced apart in the up-down direction.

According to this absorbent article, the cutting guide portion can be used to guide the cutting of the waist peripheral portion, and the auxiliary melting portion can reduce the risk of the waist peripheral portion being cut at an unintended position.

In this absorbent article, it is preferable that the length in the left-right direction of at least a part of the plurality of auxiliary melting portions is longer than the length in the up-down direction.

According to this absorbent article, the auxiliary melting portion can easily reduce the risk of breakage due to the force applied to the waist peripheral portion from the left and right directions.

In this absorbent article, it is preferable that the cutting guide portion is continuous from the upper end to the lower end of the waist peripheral portion where the cutting guide portion is provided in the up-down direction.

According to this absorbent article, the cutting guide portion of the melting portion reduces the risk of unintentional tearing, and when cutting the waist peripheral portion, it is easy to completely cut from the upper end to the lower end of the waist peripheral portion. .

In this absorbent article, it is preferable that the cutting guide portion is inclined with respect to the up-down direction.

According to this absorbent article, compared to a case where the cutting guide portion is parallel to the up-down direction, the cutting guide portion can be used to reduce the risk of being torn against the intention.

In this absorbent article, among the cutting guide portions, the end of the coupling portion closest to the front end portion is the starting point of the cutting guide, and the cutting guide portion has: from the side closest to the front end portion The upper inclined portion is inclined toward the upper side and the base end side, and the lower inclined portion is inclined toward the lower side and the base end side from the end closest to the front end side. The upper inclined portion and Among the angles included by the lower inclined portion, it is preferable that the angle in the left-right direction before the base end portion is an obtuse angle.

According to this absorbent article, compared with the case where the angle between the upper slope portion and the lower slope portion on the base end side is an acute angle, it is easier to reduce the risk of unintentional breaking of the waist from the cutting guide starting point along the cutting guide portion. The risk of breakage in the peripheral parts.

In this absorbent article, among the cutting guide portions, the end of the coupling portion closest to the front end portion is the starting point of the cutting guide, and the cutting guide portion has: from the side closest to the front end portion The upper inclined portion is inclined toward the upper side and the base end side, and the lower inclined portion is inclined toward the lower side and the base end side from the end closest to the front end side. The upper inclined portion and Among the angles included by the lower inclined portion, it is preferable that the angle in the left-right direction before the base end portion is an acute angle.

According to this absorbent article, the cutting guide portion is a melted portion, thereby reducing the risk of unintentional tearing like a tear line, and the upper slope portion and the lower slope portion on the base end side are When the included angle is an obtuse angle, the waist peripheral portion can be easily cut using the cutting guide portion.

In this absorbent article, when the absorbent article is viewed from the waist peripheral portion side where the cutting guide portion is provided in the front-rear direction, the cutting guide portion preferably has a portion overlapping the coupling portion.

According to this absorbent article, since the coupling portion easily covers at least a part of the cutting guide portion, the risk of the waist peripheral portion being torn against the intention can be reduced.

In this absorbent article, the base end of the connecting portion is fixed to the waist peripheral portion with a fixing portion, at least a part of the fixing portion is also the cutting guide portion, and in the connecting portion, from the fixing portion to The maximum length in the left-right direction from the end on the front end side is preferably longer than the maximum length in the left-right direction from the fixed portion to the end on the base end side.

According to this absorbent article, the cutting guide portion is a fixing portion that fixes the coupling portion to the waist peripheral portion. This can reduce the possibility of cutting the waist peripheral portion in an unintentional state, and the cutting guide portion can be used along the cutting guide portion. When cutting the waist peripheral part, it is easy to grasp the front end of the coupling part and apply force, thereby cutting the waist peripheral part easily.

In this absorbent article, the fixing portion is provided at the waist peripheral portion on one side, the fixing portion is provided on the other side of the joint portion in the left-right direction, and the engaging portion is provided in the left-right direction. , is provided on the other side than the fixed part, and in the left-right direction, the maximum length from the fixed part to the end of the joint part on the base end side is longer than the length from the fixed part to the joint The maximum length to the base is preferably short.

According to this absorbent article, it is possible to reduce the problem that the maximum length from the fixing part to the end on the base end side of the joining part in the left-right direction is longer than the maximum length from the fixing part to the joining part. There is a risk of the joint being accidentally torn from the base end side.

In this absorbent article, the connecting portion is fixed to the waist peripheral portion with a fixing portion, and the connecting portion includes a fixing means area provided with a fixing means, and the fixing means is used to form the fixing portion, and the fixing portion At least a part of it is also the cutting guide part, and the length of the fixing means area in the up-down direction is preferably longer than the length in the up-down direction of the melting part.

According to this absorbent article, the length of the fixing means region is made longer than the length of the melted portion of the waist peripheral portion in the vertical direction, thereby making it easier to separate the waist peripheral portion with the cutting guide portion as a boundary.

In this absorbent article, in a natural state, the connecting portion is folded back from the rear side in the front-rear direction to the front side in the front-rear direction on the one side in the left-right direction and from the one side in the front-rear direction. When the absorbent article is viewed from the waist peripheral side, the base end of the coupling portion is preferably located at the rearmost side of the absorbent article, and the front end of the coupling portion is preferably located at the frontmost side of the absorbent article.

According to this absorbent article, in a natural state, at least part of the waist peripheral portion located on the front side and the rear side of one of the left and right directions can be covered with the joining portion, thereby reducing the risk of the waist peripheral portion being accidentally torn. .

In this absorbent article, the connecting portion is fixed to the one waist peripheral portion by a fixing portion, the engaging portion is detachably engaged with the non-skin side of the one waist peripheral portion, and the one waist peripheral portion The peripheral portion has, in the left-right direction, between the joint portion and the fixed portion, a stretchable region that stretches in the left-right direction and a non-stretchable region that does not stretch in the left-right direction, and the stretchable region is adjacent to the other side from the other side. It is preferable that the joint part and the non-elastic area are adjacent to the fixing part from the one side.

According to this absorbent article, the non-stretchable region facilitates cutting of the cutting guide portion, and the stretchable region makes it easier for the waist-peripheral opening formed using the coupling portion to fit the wearer's body.

In this absorbent article, in the left-right direction, the fixing part is provided on the other side than the joining part, the engaging part is provided on the other side of the fixing part, and the joining part has The non-fixed portion is not fixed to the one-side waist peripheral portion provided on the one side of the fixed portion and on the other side of the joint portion, and is located on the one-side waist peripheral portion from the front-rear direction. When the absorbent article is viewed from the side, it is preferred that the absorbent article has a portion where the non-stretchable region and the non-fixed portion overlap.

According to this absorbent article, the force acting on the joint part is directly applied to the joint part through the non-stretchable area, and the non-fixed part covers the non-stretchable area, thereby improving the strength of the part between the joint part and the fixed part. The stiffness can easily reduce the risk of partial damage between the joint part and the fixed part.

In this absorbent article, the connecting portion is fixed to the waist peripheral portion with a fixing portion, the fixing portion is a welding portion that fuses the waist peripheral portion and the connecting portion, and at least a part of the fixing portion is also the aforementioned In the cutting guide portion, the one side waist peripheral portion is provided with a one side stretchable region that is stretchable in the aforementioned left and right direction, the aforementioned other side waist peripheral portion is provided with the other side stretchable region that is stretchable in the aforementioned left and right direction, and the aforementioned one side stretchable region It is connected to the other side telescopic area through the joint part, and the joint part includes: a base end side non-elastic area on the base end side that does not expand and contract in the left and right direction, and a base end side non-elastic area that does not expand and contract in the aforementioned front end side. It is preferable that the front end side non-elastic area that expands in the left and right direction, the base end side non-elastic area and the front end side non-elastic area are connected through the fixing part.

According to this absorbent article, the expansion and contraction of the expansion and contraction area adjacent to the joint portion prevents the force from being concentrated on the joint portion, causing joint damage of the joint portion, and the non-elastic area of the fixed portion adjacent to the joint portion prevents the joint from being damaged. The force applied to the joint portion can be directly applied, so it is easy to cut the waist peripheral portion due to the force applied to the joint portion.

In this absorbent article, it is preferable that the melting portion and the joining portion are arranged in different patterns.

According to this absorbent article, the melting portion and the joining portion can be provided in an appropriate arrangement pattern according to their respective uses.

In this absorbent article, it is preferable that the end portion of the connecting portion on the side of the front end portion has a concave and convex portion.

According to this absorbent article, it is easy to set the cutting guide starting point by the concave and convex portion of the end on the front end side of the joint portion, and it is easy to cut the waist peripheral portion using the cutting guide starting point.

===First implementation form=== Hereinafter, embodiments of the absorbent article of the present invention will be explained taking, as an example, an undergarment-type disposable diaper for infants. However, the absorbent article of the present invention is not limited to disposable diapers for infants and can also be used in disposable diapers, menstrual pants, etc. for adults.

===Structure of disposable diaper 1=== FIG. 1 is a perspective view of the disposable diaper 1 (hereinafter referred to as "diaper") in a worn state according to the first embodiment, viewed from one side in the left-right direction. FIG. 2 is a top view of the diaper 1 in a natural state as viewed from the abdominal waist peripheral portion 20 side. FIG. 3 is a top view of the diaper 1 in an unfolded and stretched state, viewed from the non-skin side side. The center line C-C in Figure 3 and others is the center line in the left-right direction in the extended state. Moreover, FIG. 3 shows the unfolded and extended state of the panty-type diaper 1 shown in FIGS. 1 and 2 . In the following, the center line C-C in the left-right direction of the diaper 1 in each figure is the center line in the extended state.

The "natural state" refers to the state when the diaper 1 is left for a predetermined time. For example, the diaper 1 in the product state is taken out of the package, the back waist peripheral portion 30 is pulled outward in the left and right directions, so that the waist peripheral portions 20 and 30 are in an "extended state", and the stretched state is continued for 15 seconds. , unstretch the diaper 1 and place it on a flat surface such as a table. Then, the state after being left on such a flat surface for 5 minutes was designated as the natural state.

The "expanded state" refers to the joining portion 2 a of both sides of the diaper 1 in the panty-type state, that is, the both side ends of the abdominal waist peripheral portion 20 and the both side ends of the back waist peripheral portion 30 , 2b are separated separately, and the entire diaper 1 is unfolded into a flat state. The "stretched state" refers to a state in which the stretchable member included in the diaper 1 is stretched to an extent that wrinkles in the diaper 1 are no longer visible. Specifically, it means a state in which the size of each member constituting the diaper 1 (for example, the abdominal waist peripheral portion 20 described below) is extended to a size that is consistent with or close to the size of the member alone.

The diaper 1 has an up-down direction, a left-right direction, and a front-back direction in the panty-type state shown in FIGS. 1 and 2, and is formed with a waist peripheral opening BH and a pair of leg peripheral openings LH. In the up-down direction, the waist peripheral opening BH side is the upper side, and the span lower side is the lower side. In the front-to-back direction, the wearer's ventral side is the front side, and the wearer's back side is the rear side. In addition, the direction in which the materials constituting the diaper 1 are laminated is called the thickness direction, the side in contact with the wearer in the thickness direction is called the skin side, and the side opposite to the skin side is called the non-skin side. In addition, the thickness direction is also the direction along the front-to-back direction in the natural state.

The diaper 1 on the underwear side is a so-called three-piece type and has an absorbent main body 10, an abdominal waist peripheral part 20, and a back waist peripheral part 30. The ventral waist peripheral portion 20 covers the wearer's ventral side, and the dorsal waist peripheral portion 30 covers the wearer's back. The diaper 1 also has a connecting portion 5 .

In the unfolded state of the diaper 1 shown in FIG. 3 , the abdominal waist peripheral portion 20 and the back waist peripheral portion 30 are arranged so that their longitudinal directions follow the left-right direction of the diaper 1 . Then, one end of the absorbent main body 10 in the longitudinal direction is arranged at the center of the abdominal waist peripheral portion 20 in the left and right direction, and an absorbent is arranged at the central portion of the back waist peripheral portion 30 in the left and right direction. The other end of the main body 10 in the longitudinal direction forms the lower span 40 . The absorbent main body 10 is arranged closer to the skin than the abdominal waist peripheral portion 20 and the back waist peripheral portion 30 .

The diaper 1 in the unfolded state shown in Figure 3 is folded in half at approximately the center CL in the longitudinal direction of the absorbent body 10 with the longitudinal direction of the absorbent body 10 along the up and down direction of the diaper 1, and the diaper 1 is The two side ends of the ventral waist peripheral portion 20 and the two side ends of the dorsal waist peripheral portion 30 in the left and right directions are joined by heat welding or ultrasonic welding to form a pair of joint portions 2a and 2b. This becomes the diaper 1 in the panty-type state shown in FIGS. 1 and 2 . The joint portion 2a is a joint portion provided on one side in the left-right direction, and the joint portion 2b is a joint portion provided on the other side in the left-right direction.

The absorbent main body 10 includes an absorbent body 11, a liquid-permeable surface sheet 12 disposed closer to the skin than the absorbent body 11, a second sheet 13 disposed between the surface sheet 12 and the absorbent body 11, and a liquid-permeable surface sheet 12 disposed closer to the skin than the absorbent body 11. The side sheets 14 are arranged on the skin side of the absorbent body 11 and the second sheet 13. The liquid-impermeable back sheet 15 is arranged on the non-skin side than the absorbent body 11. The liquid-impermeable back sheet 15 is arranged on the non-skin side than the back layer sheet 15. Exterior sheet 16 on the skin side.

The absorbent body 11 has a substantially rectangular shape in plan view and includes an absorbent core A that absorbs and retains excretion fluids such as urine, and a liquid-permeable core-covering sheet (not shown) that covers the absorbent core. Examples of the absorbent core A include liquid-absorbent fibers such as pulp containing superabsorbent polymer (SAP) formed into a predetermined shape, for example, a substantially hourglass shape when viewed from above (formed product of liquid-absorbent fibers) , forming the super absorbent polymer (SAP) into a sheet shape, so-called SAP sheet. Furthermore, the absorbent core 11A may be a SAP sheet and a molded article of liquid-absorbent fiber stacked in the thickness direction. For example, the SAP sheet, the molded article of liquid-absorbent fiber, and The absorbent core 11A composed of SAP sheets may also be used. The length of the absorbent core 11A of the diaper 1 in the left-right direction is almost the same as the length of the absorbent core 11 in the left-right direction. Examples of the core-covered sheet include liquid-permeable sheets such as toilet paper and nonwoven fabrics. Alternatively, the structure may not include a core-covering sheet.

As shown in FIG. 3 , the leg peripheral elastic members 17 provided on both sides of the absorbent main body 10 in the left-right direction constitute leg elastic bands. The leg elastic bands of the panty-type diaper 1 are provided along the leg periphery openings LH. The expansion and contraction of the leg periphery elastic members 17 allows the diaper 1 to be in close contact with the wearer's leg periphery. A plurality of rubber cords are used for the elastic members 17 around the legs of the diaper 1, for example, between the exterior sheets 16 that are folded inwards in the left and right directions to form two layers, and between the back layer sheet 15 and the exterior sheet 16. During this time, the absorbent main body 10 is fixed in a state of being extended in the longitudinal direction.

On both sides of the absorbent main body 10 in the left-right direction, there are leakage-proof wall elastic members 18 on the inside of the leg peripheral elastic members 17 . Between the side sheets 14 that are folded outward in the left-right direction and formed into two layers, a plurality of leakage-proof wall telescopic members 18 are fixed in a state of being extended in the longitudinal direction to form a pair of leak-proof wall elastic members 18 along the longitudinal direction. Leaky wall part. When the diaper 1 is worn, the elasticity exerted by the leakage-proof wall elastic member 18 causes the leakage-proof wall portion to stand up toward the wearer's skin side and closely adhere to the wearer's crotch area.

Examples of the leg peripheral elastic members 17 and the leakage-proof wall elastic members 18 include rubber cords, elastic sheets, and the like.

The abdominal waist peripheral portion 20 includes a skin side sheet 21, a non-skin side sheet 22, and a plurality of elastic members 23. The skin side sheet 21 and the non-skin side sheet 22 are joined by a joining means such as an adhesive such as hot melt glue or welding by heat or ultrasonic waves. The skin-side sheet 21 and the non-skin-side sheet 22 are sheet members of substantially the same size and substantially the same shape. In this embodiment, they have a substantially rectangular shape. The non-skin side sheet 22 is arranged on the non-skin side of the skin side sheet 21 . As the skin side sheet 21 and the non-skin side sheet 22, you can use: SMS nonwoven fabric (spunbond, meltblown, spunbond nonwoven fabric), spunbond nonwoven fabric, hot air nonwoven fabric, spot bonded nonwoven fabric, stretch nonwoven fabric, plastic sheet, perforated plastic sheet and non-stretchable sheets of such laminated sheets.

The plurality of elastic members 23 of the abdominal waist peripheral portion 20 are arranged side by side in the up and down direction between the skin side sheet 21 and the non-skin side sheet 22, and are fixed in a state of being extended in the left and right directions. Thereby, the abdominal waist peripheral portion 20 expands and contracts in the left and right directions to closely adhere to the wearer's waist periphery. Examples of the elastic member 23 include elastic members such as rubber or elastic fiber. On the non-skin side of the non-skin-side sheet 22, there is an engaged portion 25 to which an engaging portion 51 (described later) can engage. The engaged portion 25 is a so-called target area, and an example thereof is a nonwoven sheet. Furthermore, if a hook member of Velcro felt is used for the engaging portion 51 , a loop member of Velcro felt is used for the engaged portion 25 , and the engaged portion corresponding to the engaging portion 51 is preferably selected. In addition, as the engaged portion 25, no other member is provided on the non-skin side of the non-skin-side sheet 22, but the non-skin-side sheet 22 made of a member (for example, nonwoven fabric) that can be engaged with the engaging portion 51 is used. It can also be directly engaged with the non-skin side of the non-skin side sheet 22.

The back waist peripheral portion 30 includes a skin side sheet 31, a non-skin side sheet 32, and a plurality of elastic members 33. The skin-side sheet 31 and the non-skin-side sheet 32 are joined by a joining means such as an adhesive such as hot melt glue or heat or ultrasonic welding. The skin-side sheet 31 and the non-skin-side sheet 32 are sheet members of substantially the same size and substantially the same shape. In this embodiment, they have a substantially rectangular shape. The non-skin side sheet 32 is arranged on the non-skin side of the skin side sheet 31 . As the skin side sheet 31 and the non-skin side sheet 32, for example, polypropylene SMS nonwoven fabric (spunbond, meltblown, spunbond nonwoven fabric), spunbond nonwoven fabric, air-through nonwoven fabric, point-bonded nonwoven fabric, stretch nonwoven fabric, plastic sheet, Non-stretchable sheets of perforated plastic sheets and laminated sheets thereof.

The plurality of elastic members 33 of the back waist peripheral portion 30 are arranged side by side in the up and down direction between the skin side sheet 31 and the non-skin side sheet 32, and are fixed in a state of being extended in the left and right directions. Thereby, the ventral waist peripheral portion 20 and the dorsal waist peripheral portion 30 each expand and contract in the left and right directions to closely adhere to the wearer's waist periphery. Examples of the elastic members 23 and 33 include elastic members made of rubber, elastic fiber, or the like.

The coupling part 5 is a so-called tag (grabbing part) member, and is a member used to form a waist peripheral opening when the abdominal waist peripheral part 20 is cut. Figure 4 is an enlarged view of part X in Figure 3. In the coupling part 5 of this embodiment, the base end part (one side in the left-right direction in FIG. 3 etc.) of the coupling part 5 is fixed to one side further than the center in the left-right direction of the abdominal waist peripheral part 20, and the front end part (Figure 3) 3 and so on) has an engaging portion 51 that is detachably engaged with the non-skin side of the abdominal waist peripheral portion 20 .

The joint part 5 is a gripping part that the wearer or a person who puts on the diaper 1 for the wearer (hereinafter also referred to as "the wearer") performs a grabbing action. The joint part 5 itself has a strength that does not break. good. As the joining part 5 , for example, various films such as plastic films and nylon films, nonwoven fabrics, and films obtained by laminating nonwoven fabrics can be used. The joint part 5 of the diaper 1 in this embodiment is a sheet-like member made of three layers of nonwoven fabric of the same size stacked on both sides of a plastic film.

The engaging portion 51 is provided on the skin side of the coupling portion 5 and is a member that is detachably engaged with the non-skin side of the abdominal waist peripheral portion 20 (specifically, the engaged portion 25 ). Examples of the engaging portion 51 include a hook member of Velcro felt or an adhesive material such as an adhesive sheet. The engaging portion 51 of this embodiment has a substantially rectangular shape, but may also have any shape such as a circle.

As shown in FIG. 4 and others, the coupling portion 5 is fixed to the abdominal waist peripheral portion 20 via the fixing portion F1 and the auxiliary fixing portion F2. The fixing part F1 and the auxiliary fixing part F2 of this embodiment are welding parts formed by joining the joint part 5 and the abdominal waist peripheral part 20 in the thickness direction by thermal welding or ultrasonic welding. The coupling part 5 is mainly fixed to the abdominal waist peripheral part 20 by the fixing part F1, and the auxiliary fixing part F2 is fixed by the auxiliary fixing part F1.

===About how to wear diaper 1=== Diapers 1 can be worn in multiple ways. For example, as a general panty-type diaper (see FIG. 1 ), the wearer's feet are allowed to enter the leg peripheral opening LH from the waist peripheral opening BH, so that the waist peripheral parts 20 and 30 surround the wearer's waist periphery. Pull it up to make it wearable.

Furthermore, after wearing the panty-type disposable diaper as described above, the abdominal waist peripheral portion 20 is cut with a cutting guide (described later), and the engaging portion 51 of the coupling portion 5 is engaged with the abdominal waist peripheral portion. 20. An opening is formed around the waist so that it can be worn. Thereby, the engaging position of the engaging portion 51 can be adjusted to easily fit closely around the wearer's waist.

In addition, the abdominal waist peripheral part 20 is cut in advance with the cutting guide part, so that one side in the left-right direction is in the form of a so-called adhesive diaper (a state in which the leg peripheral openings LH are not formed), and the other side in the left-right direction is made into a so-called adhesive diaper. It can also be worn in the form of a panty-type diaper (with openings LH around the legs).

First, the abdominal waist peripheral portion 20 is cut with the cutting guide portion, and the wearer's other foot (the wearer's right foot in the case of the diaper 1) passes through the other side in the left-right direction (in the form of a panty-type diaper). ) of the leg peripheral opening LH, and then pull the diaper 1 up to the wearer's crotch area, and then engage the engaging portion 51 of the connecting portion 5 on the abdominal side in a manner that it closely adheres to the wearer's waist periphery. The waist peripheral portion 20 forms a waist peripheral opening, whereby the wearer is in a worn state.

By wearing it in this way, for example, even for infants whose feet move around and it is difficult to pass the legs through the leg peripheral openings LH on both sides of the panty-type disposable diaper, as long as the wearer can pass one leg through the legs. The peripheral opening LH is then engaged with the coupling portion 5 (engagement portion 51), thereby making it easy to put it into a wearing state. Moreover, when the wearer himself wears the diaper 1, it may be difficult to wear a general adhesive type diaper (a diaper with tape on both sides in the left and right directions) in the toilet, etc., but one side in the left and right directions is the underwear. The other side has a connecting portion 5 (adhesive type), making it easy to put on and adjust the tightness around the waist.

Furthermore, when the used diaper 1 is removed from the wearer's body, the abdominal waist peripheral portion 20 is separated by the cutting guide, one side of the left-right direction of the diaper 1 is removed from the wearer's body, and the other side is removed from the wearer's body. The diaper 1 can be removed from the wearer's body by pulling out the leg peripheral opening LH on the other side in the left-right direction.

===About cutting off the abdominal waist peripheral part 20=== Cutting of the abdominal waist peripheral portion 20 will be described using FIGS. 5 and 6 . FIG. 5 is a diagram illustrating the separation of the abdominal waist peripheral portion 20 and the formation of the waist peripheral opening. FIG. 6 is a diagram explaining the cutting operation of the abdominal waist peripheral portion 20 . FIG. 5 is a diagram illustrating the structure of a cross section taken along arrow A-A in FIG. 4 . In addition, Figures 5 and 6 are schematic diagrams, and the dimensions and the like are not necessarily correct.

Fig. 5A shows the diaper 1 in the panty-type state shown in Fig. 1 and others. That is, the abdominal waist peripheral portion 20 is not cut, but a waist peripheral opening is formed to connect the abdominal waist peripheral portion 20 and the dorsal waist peripheral portion 30 through the joint portions 2a and 2b. From the state shown in FIG. 5A , the state in which the front end of the coupling portion 5 is grasped and pulled toward the non-skin side is shown in FIGS. 5B and 6A .

Then, as shown in FIG. 6A , grasp the waist peripheral part 20 with one hand and the connecting part 5 with the other hand, and pull them outward in the left and right directions respectively, as shown in FIGS. 5C and 6B . The abdominal waist peripheral portion 20 is cut along the cutting guide portion to separate one side from the other side in the left-right direction. The "cutting guide portion" refers to a guide portion when cutting at least a part of the abdominal waist peripheral portion 20 . In the diaper 1, the fixing part F1 which fixes the abdominal waist peripheral part 20 and the coupling part 5 functions as a cutting guide part. Specifically, as shown in FIG. 6A , if the abdominal waist peripheral part 20 and the connecting part 5 are respectively grasped and pulled apart in the left and right directions, first, the pulling force will be concentrated on the cutting guide part (fixing part F1 ), the end on the front end side of the most distal end side is the cutting guide starting point K, and then along the inclined portion that is inclined from the cutting guide starting point K of the cutting guide portion toward the upper side and the base end side The force is transmitted to the inclined portion inclined from the cutting guide starting point K toward the lower side and toward the base end side. Then, the abdominal waist peripheral portion 20 is cut with the other left-right end CE of the fixed portion F1 as a boundary, and the abdominal waist peripheral portion 20 is separated into one side without the coupling portion 5 part and the part on the other side provided with the coupling part 5 .

Thereafter, if necessary, as shown in FIG. 5D , the engaging portion 51 of the coupling portion 5 is engaged with the engaged portion 25 of the abdominal waist peripheral portion 20 , thereby forming a waist peripheral opening of the diaper 1 . In a state where the engaging portion 51 is engaged with the engaged portion 25, one portion and the other portion in the left-right direction of the separated abdominal waist peripheral portion are overlapped in the front-rear direction (thickness direction) to engage. The engaging portion 51 may be engaged with the engaged portion 25 so that one portion and the other portion of the left-right direction of the separated abdominal waist peripheral portion do not overlap in the front-rear direction (thickness direction). It may also be engaged with the engaged part 25. By adjusting the engaging position of the engaging portion 51, the size of the opening around the waist of the diaper 1 can be adjusted.

===About cutting the guide part=== In the diaper 1, one of the left and right ends of the abdominal waist peripheral portion 20 and the back waist peripheral portion 30 is joined by the joint portion 2a, and the base end of the joint portion 5 is fixed to the abdomen by the fixing portion F1. Side waist peripheral part 20. The front end of the connecting portion 5 has an engaging portion 51 that is detachably engaged with the non-skin side of the abdominal waist peripheral portion 20, and at least a part of the fixing portion F1 that fixes the connecting portion 5 and the abdominal waist peripheral portion 20. , is the cutting guide part. Specifically, in the diaper 1, if the abdominal waist peripheral portion 20 and the connecting portion 5 are respectively pulled apart outward in the left-right direction, the other end of the fixed portion F1 (cutting guide portion) in the left-right direction will be The abdominal waist peripheral portion 20 is cut with the portion CE as the boundary.

FIG. 7 is an enlarged view of the abdominal waist peripheral portion 20 in FIG. 3 . FIG. 8 is an enlarged view of the fixing part F1 and the auxiliary fixing part F2. In FIG. 8 , the end CE on the other side of the fixed portion F1 serving as the boundary is indicated by a thick line.

Conventionally, it has been known to provide tear lines and the like in order to cut the waist peripheral portions 20 and 30 of disposable diapers. In contrast, in the diaper 1, the fixing part F1 for fixing the joint part 5 to the abdominal waist peripheral part 20 also functions as a cutting guide part, so there is no need to provide a separate cutting guide part such as a tear line. Thereby, the abdominal waist peripheral portion 20 can be cut, and in the manufacturing process of the diaper 1, a manufacturing process for forming a cutting guide such as a process for forming a tear line is not required, and a simplified process can be provided. Manufacturing engineering to manufacture diapers 1.

Common fixing methods can be used to fix the abdominal waist peripheral portion 20 of the fixing portion F1 and the connecting portion 5 . For example, it can be fixed by heat or ultrasonic welding, adhesive, etc. Moreover, the fixed part F1 of the diaper 1 of this embodiment is a welding part. As mentioned above, the cutting guide portion of the diaper 1 is preferably a welding portion in which the abdominal waist peripheral portion 20 and the joining portion 5 are welded and fixed.

Fig. 9A is a diagram explaining the cutting guide portion of the diaper 1. FIG. 9B is a diagram explaining the cutting guide portion of the tear line. FIG. 9A is an enlarged view of part Y in FIG. 5A , and FIG. 9B is an enlarged view of the part provided with a tear line at the abdominal waist peripheral portion of a general disposable diaper. The cutting guide part of the diaper 1 is fixed by welding. As mentioned above, tear lines and the like are known as conventional cutting guide portions. As shown in FIG. 9B , regarding the cutting guide portion formed by the tear line M, the skin-side waist peripheral portion 20 of the portion where the tear line M is provided may have holes or fewer fibers. Therefore, it is an easily damaged part. Therefore, during the manufacturing process or transportation of the diaper 1, or when the wearer or the like uses the diaper 1, there is a risk that the abdominal waist peripheral portion 20 may be accidentally torn by the cutting guide portion against the wearer or the like's intention. On the other hand, as shown in FIG. 9A , the welded portion is a portion where fibers are melted and fixed, and the total amount of fibers is not reduced. Therefore, the fixed portion F1 formed of the welded portion functions as a cutting guide portion, whereby cutting can be performed during an operation for the purpose of cutting, and in the case where there is no intention of cutting, the problem can be reduced. There is a risk of tearing the ventral waist peripheral portion 20 by accidentally cutting the guide portion against the intention.

As shown in FIG. 5 and others, when the diaper 1 is viewed from the abdominal waist peripheral portion 20 side, the portion overlapping the fixing portion F1 is closest to the coupling portion in the front and rear direction (thickness direction) among the abdominal waist peripheral portions 20 . The melting point of the member on the 5 side is preferably lower than the melting point of the member on the side closest to the abdominal waist peripheral portion 20 of the joint portion 5 . In the diaper 1, the member closest to the joint portion 5 side among the abdominal waist peripheral portion 20 is the non-skin side sheet 22. Among the joint portion 5, the member closest to the abdominal waist peripheral portion 20 side is one of the three layers. The non-woven sheet closest to the skin side. In the fixed portion F1 fixed by welding, since the material with a lower melting point is relatively easy to melt, the melted material is relatively easy to be cut. Therefore, the melting point of the member (non-skin side sheet 22) of the abdominal waist peripheral portion 20 that is closest to the joint portion 5 is lower than the melting point of the member of the joint portion 5 that is closest to the abdominal waist peripheral portion 20. , and melts more easily, thereby promoting the melting of the member (non-skin side sheet 22) of the cutting guide portion (fixed portion F1) on the abdominal waist peripheral portion 20 side, so that the abdominal waist peripheral portion 20 can be easily cut.

In addition, not only the member (non-skin-side sheet 22) of the abdominal waist peripheral portion 20 that is closest to the coupling portion 5, but also other members constituting the abdominal waist peripheral portion 20 (skin-side sheet 21 in this embodiment) The melting point is preferably lower than the melting point of the joint portion 5 closest to the abdominal waist peripheral portion 20 side. Compared with the members of the connecting portion 5, melting of the entire abdominal waist peripheral portion 20 is easily promoted, so it is easier to cut the abdominal waist peripheral portion 20.

In addition, as the members of the skin-side sheet 21, the non-skin-side sheet 22, etc. of the abdominal waist peripheral part 20 that are welded (melted) by the fixing part F1, and the joining part 5, polyester, polyethylene, polyethylene, etc. can be used. Non-woven sheets or film sheets made of acrylic, polyethylene terephthalate, etc.

As a method of cutting the abdominal waist peripheral portion 20 using the fixed portion F1 as a cutting guide, for example, as described above, there is a method of pulling the joint portion 5 and the abdominal waist peripheral portion 20 outward in the left and right directions respectively to cut the abdomen. The method of separating the side waist peripheral portion 20, the method of twisting the joint portion 5 and the abdominal waist peripheral portion 20 in opposite directions to tear them apart, etc.

When the abdominal waist peripheral portion 20 is cut with the cutting guide portion, when the diaper 1 is viewed from the abdominal waist peripheral portion 20 side in the front-rear direction, the connection portion 5 is adjacent to the fixing portion F1 from the front end side. In the region, when comparing the part with the smallest weight per unit area in the joint part 5 and the part with the largest weight per unit area in the abdominal waist peripheral part 20, the part with the smallest weight per unit area in the joint part 5 is Bigger is better. 10A and 10B are diagrams illustrating cutting of the cutting guide portion. FIG. 10A is an enlarged view of part Y of FIG. 5A. 10A and 10B are schematic diagrams for explaining the cutting guide portion, and do not necessarily have compatibility with other diagrams or actual product dimensions. In FIGS. 10A and 10B , the thickness of the joint portion 5 having a large weight per unit area is shown as thicker, and the thickness of the abdominal waist peripheral portion 20 having a small weight per unit area is shown as thinner.

In the diaper 1, as shown in FIG. 10A, from the state where the joint part 5 having a large weight per unit area and the abdominal waist peripheral part 20 having a small weight per unit area are fixed by the fixing part F1, as shown in FIG. As shown in 10B, if the connecting portion 5 and the abdominal waist peripheral portion 20 are pulled apart toward the outside in the left-right direction, the tearing force will be concentrated on the fixed portion F1, and on the other side of the fixed portion F1 in the left-right direction. The end CE cuts the abdominal waist peripheral portion 20 as if it were torn. At this time, when viewed from the abdominal waist peripheral portion 20 side, in the adjacent area adjacent to the fixing portion F1 from the front end side of the joint portion 5, the weight per unit area of the joint portion 5 is made to be greater than that of the abdominal waist peripheral portion 20 The weight per unit area is larger. Therefore, compared with the case where the weight per unit area of the connecting portion 5 is smaller than the weight per unit area of the abdominal waist peripheral portion 20 , the abdominal waist peripheral portion 20 is easily torn. The joint part 5, which is cut open and has a large weight per unit area, can easily maintain a fixed state to the fixing part F1. As mentioned above, it is not the joint part 5 but the abdominal waist peripheral part 20 that is easy to cut. This allows the joint part 5 to engage with the cut and separated abdominal waist peripheral part 20, thereby forming a waist peripheral opening. , can become diaper 1.

The weight per unit area of the abdominal waist peripheral portion 20 and the joint portion 5 is, for example, cut out from each member using the unit area (for example, a 10 mm × 10 mm square) as an adjacent area, and measure the weight of each sample. Comparisons can be made. Furthermore, in the diaper 1 of this embodiment, members such as the skin side sheet 21 are folded back at the upper end of the abdominal waist peripheral portion 20. Therefore, the most overlapping portion of the folded members is per unit of the abdominal waist peripheral portion 20. Cut out the part with the greatest weight by area and use it as a sample. Similarly, in the joint part 5, when the weight per unit area is partially different, the part with the largest weight per unit area is cut out as a sample, and the weights of the two samples are compared. In addition, the adjacent area refers to a predetermined area from the other end CE on the left-right direction of the fixed part F1 to the front end side of the coupling part 5. In this embodiment, it is a square of 10 mm × 10 mm. However, as long as it is from If the other end CE in the left-right direction of the fixed portion F1 is adjacent to the front end side of the coupling portion 5 and has the same structure as the lamination of the abdominal waist peripheral portion 20 and the coupling portion 5, the length can be arbitrary. settings. Furthermore, in the case where the structure of the region on the front end side adjacent to the coupling portion 5 from the other end CE on the left-right direction side of the fixed portion F1 and the lamination of the abdominal waist peripheral portion 20 and the coupling portion 5 are the same. When comparing the weight per unit area, any part can be cut out as a sample.

In addition, when the diaper 1 is viewed from the abdominal waist peripheral portion 20 side in the front-rear direction, the weight per unit area is the smallest among the comparative joining portions 5 in the area adjacent to the fixing portion F1 from the front end side of the joining portion 5 When the portion with the largest weight per unit area among the abdominal waist peripheral portion 20 is larger, the portion with the smallest weight per unit area among the joint portion 5 is preferably larger.

The abdominal waist peripheral portion 20 of the diaper 1 in this embodiment is formed by overlapping the skin side sheet 21 and the non-skin side sheet 22 (waist peripheral sheet member). The joining portion 5 is formed by a nonwoven sheet and a film sheet. , three sheet members (joint sheet members) of the nonwoven sheet are overlapped and formed. In the diaper 1, as shown in FIG. 10A, the weight per unit area of the joint sheet member (three-layer sheet member) of the joint 5 is relatively large, and the waist peripheral sheet member (skin-side sheet 21) of the abdominal waist peripheral portion 20 The weight per unit area is smaller than that of the non-skin side sheet 22). From the state where the coupling part 5 and the abdominal waist peripheral part 20 are fixed by the fixing part F1, as shown in FIG. 10B , if the coupling part 5 and the abdominal waist peripheral part 20 are respectively pulled apart toward the outside in the left-right direction, The tearing force is concentrated on the fixed portion F1, and the abdominal waist peripheral portion 20 is cut as if being torn at the end CE on the other side in the left-right direction of the fixed portion F1. At this time, when viewed from the abdominal waist peripheral portion 20 side, in the adjacent area adjacent to the fixing portion F1 from the front end side of the coupling portion 5, each of the coupling portion sheet members (three-layered sheet members) of the coupling portion 5 The weight per unit area is greater than the weight per unit area of the waist periphery sheet members (skin side sheet 21 and non-skin side sheet 22) of the abdominal waist periphery part 20, and thereby is compared to the joint sheet member of the joint part 5 When the weight per unit area of the three-layered sheet member is smaller than the weight per unit area of the waist peripheral sheet member (skin side sheet 21 and non-skin side sheet 22) of the abdominal waist peripheral portion 20, it is easy to use If the abdominal waist peripheral portion 20 is cut in a torn manner, the coupling portion 5 can easily maintain a fixed state to the fixing portion F1. As mentioned above, it is not the joint part 5 but the abdominal waist peripheral part 20 that is easy to cut. This allows the joint part 5 to engage with the cut and separated abdominal waist peripheral part 20, thereby forming a waist peripheral opening. , can become diaper 1.

The weight per unit area of the abdominal waist peripheral part 20 and the joint part 5 is determined by, for example, cutting out samples from each member using the unit area (for example, a square of 10 mm × 10 mm) as adjacent areas, and immersing them in toluene or the like to separate the stacks. Each of the sheet members of the layer is a waist periphery sheet member (skin-side sheet 21, non-skin-side sheet 22) and a joint sheet member (three-layer sheet). In addition, when adhesives and the like remain on each sheet member, all are removed with toluene or the like. Thereafter, each sheet member was dried at normal temperature for 24 hours, and then the weight of each sheet member was measured to calculate the sum of the separated sheet members of each sample so that comparison could be made. That is, the weight of the abdominal waist peripheral portion 20 and the joint portion 5 after removing the adhesive (hot melt adhesive) that joins the respective sheet members is measured and compared. Furthermore, in the diaper 1 of this embodiment, members such as the skin-side sheet 21 are folded back at the upper end of the abdominal waist peripheral portion 20. Therefore, the most overlapping portion of the folded members is the waist periphery of the abdominal waist peripheral portion 20. Cut out the part with the largest weight per unit area of the sheet member as a sample. Similarly, in the joint 5, when the weight per unit area is partially different, the part of the joint sheet member with the largest weight per unit area is cut out as a sample, and the results of removing the adhesive from the two samples are compared. weight. In addition, the adjacent area refers to a predetermined area from the other end CE on the left-right direction of the fixed part F1 to the front end side of the coupling part 5. In this embodiment, it is a square of 10 mm × 10 mm. However, as long as it is from If the other end CE in the left-right direction of the fixed portion F1 is adjacent to the front end side of the coupling portion 5 and has the same structure as the lamination of the abdominal waist peripheral portion 20 and the coupling portion 5, the length can be arbitrary. settings. Furthermore, in the case where the structure of the region on the front end side adjacent to the coupling portion 5 from the other end CE on the left-right direction side of the fixed portion F1 and the lamination of the abdominal waist peripheral portion 20 and the coupling portion 5 are the same. When comparing the weight per unit area, any part can be cut out as a sample.

Furthermore, it is preferable that the entire fixed portion F1 is a cutting guide portion. Compared with a case where a part of the fixed portion F1 is a cutting guide portion, it is easier to cut the abdominal waist peripheral portion 20 along the fixed portion F1.

The diaper 1 of this embodiment is provided with a cutting guide part (fixing part F1) in the abdominal waist peripheral part 20. The cutting guide portion provided in the abdominal waist peripheral portion 20 is preferably continuous in the vertical direction from the upper end to the lower end of the abdominal waist peripheral portion 20 . That is, the cutting guide portion, that is, the fixing portion F1, is preferably continuous from the upper end to the lower end of the abdominal waist peripheral portion 20. By making the cutting guide part continuous from the upper end to the lower end of the abdominal waist peripheral part 20, compared with the case where the cutting guide parts are not connected, the abdominal waist peripheral part 20 can be cut along the cutting guide part, making it easier to completely separation.

As shown in FIG. 8 , the end K on the frontmost side of the cutting guide portion (fixed portion F1 ) is the cutting guide starting point K. The cutting guide starting point K is the part where the force is most likely to concentrate when a force is applied to the abdominal waist peripheral part 20 and the coupling part 5 in order to cut the abdominal waist peripheral part 20 with the cutting guide part, and is also the cutting point. The easiest part to start with. Furthermore, as shown in FIG. 8 , the cutting guide portion preferably has inclined portions fa1 and fb1 that are inclined in the up-down direction from the end K on the frontmost end side toward the base end side. Thereby, the force when the wearer or the like separates the abdominal waist peripheral part 20 and the joint part 5 can first be easily concentrated on the cutting guide starting point K, and the force can be easily transmitted from the cutting guide starting point K to the inclination parts fa1 and fb1, the abdominal waist peripheral part 20 can be easily cut into a shape along the cutting guide part.

In addition, the "incline" of the inclined portions fa1 and fb1 means having an inclination in the up-down direction and the left-right direction, and is not limited to the linear inclined portions fa1 and fb1 like the diaper 1, and may have a curved portion.

Moreover, as shown in FIG. 8 , the cutting guide portion preferably has an upper inclined portion fa1 and a lower inclined portion fb1 . The upper inclined portion fa1 is an inclined portion inclined from the end K on the frontmost end side (cutting guide starting point) toward the upper side and the base end side, and the lower inclined portion fb1 is an inclined portion inclined from the end K on the frontmost end side (Cutting guide starting point) An inclined portion inclined toward the lower side and the base end side. Thereby, in order to cut the abdominal waist peripheral part 20 with the cutting guide part, the force exerted on the abdominal waist peripheral part 20 and the coupling part 5 will first be easily concentrated at the cutting guide starting point K, and it will be easy to The force concentrated on the cutting guide starting point K is transmitted to the upper inclined portion fa1 and the lower inclined portion fb1 , thereby making it easier to cut the abdominal waist peripheral portion 20 .

In addition, among the angles between the upper inclined portion fa1 and the lower inclined portion fb1, it is preferable that the angle θ on the base end side in the left-right direction is an obtuse angle (an angle larger than 90 degrees and smaller than 180 degrees). Thereby, the force applied to the upper slope part fa1 and the lower slope part fb1 from the cutting guide starting point K is easily transmitted, and the abdominal waist peripheral part 20 is easily cut, and compared with the case where θ is an acute angle, it is possible to cut The length of the guide part (fixed part F1) in the left-right direction becomes short.

As shown in FIG. 7 , the cutting guide starting point K is preferably located on one side of the absorptive core 11A in the left-right direction. The absorptive core 11A is a thick portion of the diaper 1 and has high rigidity, so it is a portion that is difficult to cut the abdominal waist peripheral portion 20 . Therefore, by providing the cutting guide starting point K on one side of the absorptive core 11A in the left-right direction, the ease of cutting the abdominal waist peripheral portion 20 can be improved.

Regarding the joining portion 5 fixed by the fixing portion F1 in the abdominal waist peripheral portion 20, it is preferable that the cutting guide portion is provided between the joining portion 2a and the absorbent core 11A in the left-right direction. That is, it is preferable that the fixing part F1 is provided between the joint part 2a and the absorptive core 11A in the left-right direction. The absorbent core 11A has a thickness and high stiffness, and is a part that is difficult to cut at the abdominal waist peripheral portion 20. Therefore, a cutting guide portion is provided between the joint portion 2a and the absorbent core 11A in the left-right direction, thereby making it possible to The ease of cutting the abdominal waist peripheral portion 20 is improved.

Moreover, as shown in FIG. 4 etc., it is preferable that the cutting guide starting point K overlaps with the engaging portion 51 in the up-down direction. As shown in FIGS. 6A and 6B , when the abdominal waist peripheral portion 20 is cut along the cutting guide portion, the engaging portion 51 of the coupling portion 5 is held more. Therefore, the cutting guide starting point K overlaps with the engaging portion 51 in the up and down direction, thereby making it easier to transmit the force applied to the coupling portion 5 to the cutting guide starting point K during cutting, making it easier to perform cutting along the direction. Cutting of the abdominal waist peripheral portion 20 of the guide portion.

In addition, as shown in FIG. 4 , the length H in the left-right direction from the cutting guide starting point K to the end on the front end side of the coupling portion 5 (the other end) is preferably 50 mm or more. As shown in FIGS. 6A and 6B , when the abdominal waist peripheral portion 20 and the connecting portion 5 are grasped and pulled outward in the left and right directions to cut the abdominal waist peripheral portion 20 , the cutting in the left and right directions is performed. If the length from the cutting guide starting point K to the end on the front end side of the coupling portion 5 is less than 50 mm, it will be difficult to grasp the coupling portion 5 by hand, or it will be difficult to apply force when pulling apart. Therefore, the length H from the cutting guide starting point K in the left-right direction to the end on the front end side of the coupling portion 5 is 50 mm or more, thereby making it easier for the wearer to cut the abdominal waist peripheral portion 20 .

It is preferable to have an auxiliary fixing part F2 for assisting in fixing the joint part 5 and the abdominal waist peripheral part 20. The auxiliary fixing portion F2 is preferably disposed at intervals in the up and down direction on the base end side (one side in the left-right direction) of the coupling portion 5 relative to the cutting guide portion (fixing portion F1). As shown in FIG. 8 and others, a plurality of auxiliary fixing portions F2 having a substantially elliptical shape are arranged at intervals along the cutting guide portion on the proximal end side of the cutting guide portion. The auxiliary fixing part F2, like the fixing part F1, is a part where the coupling part and the abdominal waist peripheral part 20 are welded. By providing the auxiliary fixing part F2, the fixing of the connecting part 5 and the abdominal waist peripheral part 20 by the fixing part F1 is strengthened, and the auxiliary fixing part F2 arranged at intervals can reduce the need for the auxiliary fixing part F2. The ventral waist peripheral portion 20 is cut off at the starting point. In particular, by arranging the auxiliary fixing parts F2 at intervals, when the coupling part 5 exerts force from the end on the base end side toward the distal end side, it is possible to reduce the need for the end on the base end side of the auxiliary fixing part F2 to be The border is used to cut off the ventral waist peripheral part 20.

Furthermore, the diaper 1 is provided with a plurality of protruding fixing parts protruding from the fixing part F1 toward the base end side between the fixing part F1 and the auxiliary fixing part F2. The plurality of protruding fixing parts are arranged at intervals in the up and down direction. This protruding fixing part, like the auxiliary fixing part F2, strengthens the fixing of the coupling part 5 and the abdominal waist peripheral part 20 by the fixing part F1, and can reduce the need for protruding fixing by the protruding fixing parts arranged at intervals. The ventral waist peripheral portion 20 is cut off from the starting point.

Furthermore, in the abdominal waist peripheral portion 20 provided with the fixing portion F1, a portion extending a predetermined distance from the cutting guide portion toward the front end side of the coupling portion 5 is non-elastic in which the abdominal waist peripheral portion 20 does not expand or contract in the left-right direction. Area is better. When the wearer or the like grasps the coupling portion 5 and pulls it apart in order to cut off the abdominal waist peripheral portion 20 , the risk of buffering the force exerted by the elongation of the abdominal waist peripheral portion 20 itself can be reduced and the coupling portion can be pulled apart. The force at 5 is easily applied to the cutting guide part (fixed part F1), thereby making it easy to cut the abdominal waist peripheral part 20 by pulling apart the coupling part 5.

As shown in FIGS. 4 and 7 , the abdominal waist peripheral portion 20 of the diaper 1 is provided with an elastic member 23 that expands and contracts in the left and right directions, and has an elastic region S that expands and contracts in the left and right directions and a non-expandable region that does not expand and contract in the left and right directions. N. The expansion and contraction area S of the abdominal waist peripheral portion 20 refers to the area in which the expansion and contraction member 23 can expand and contract. Specifically, in the left-right direction, the central portion and the area from the central portion to the side end on one side of the coupling portion 5 is the non-elastic area N. The stretchable region S has in the left-right direction: one side stretchable region Sa provided on one side, and the other side stretchable region Sb provided on the other side, and extends from the joint portion 2a on one side to the side end of the joint portion 5 on one side. The area from the joint part 2b on the other side to the central part is the one-side elastic area Sa, and the area from the joint part 2b on the other side to the center part is the other side elastic area Sb. That is, when viewed from the abdominal waist peripheral portion 20 , the portion of the abdominal waist peripheral portion 20 that overlaps the coupling portion 5 is the non-elastic region N. Therefore, the force applied to the coupling part 5 is easily applied to the cutting guide part by the non-elastic region N provided from the cutting guide part (fixed part F1) toward the front end side of the coupling part 5.

In addition, the predetermined distance of "the portion from the cutting guide portion to the front end side of the coupling portion 5 at a predetermined distance" can be set to any length. However, the longer the length of the non-elastic region N adjacent to the cutting guide (fixed portion F1) from the front end side (the other side) in the left-right direction, the more the force applied to the coupling portion 5 due to expansion and contraction can be reduced. If it is buffered, it is easy to apply to the cutting guide part. Therefore, the "predetermined distance" of the non-elastic area N of the diaper 1 in this embodiment is longer than the distance from the cutting guide part to the front end of the connecting part 5 .

The non-elastic region N of the abdominal waist peripheral portion 20 can be realized, for example, by not arranging the elastic member 23 . Furthermore, even when the elastic member 23 or an elastic member such as a stretch sheet is arranged over the entire area of the abdominal waist peripheral portion 20, a plurality of welding portions are provided at positions corresponding to the non-elastic area N, thereby making the abdominal waist peripheral portion 20. The desired position can be made non-retractable.

Furthermore, it is preferable that the abdominal waist peripheral part 20 not only have the non-elastic region N, but also the joint part 5 itself be non-elastic. Thereby, the force that pulls the joint part 5 and the abdominal waist peripheral part 20 apart from each other outward can be reduced from being buffered by the expansion and contraction of the joint part 5, and it is easy to apply force to the cutting guide part, so it is easy to perform abdominal cutting. Cutting of the waist peripheral portion 20 .

In addition, regarding the abdominal waist peripheral portion 20, the area from the cutting guide portion in the left-right direction to the side end on one side of the absorbent core 11A (the base end portion side of the coupling portion 5) does not expand or contract in the left-right direction (not Stretch area N) is better. Thereby, the force exerted on the coupling part 5 can be reduced from being buffered by expansion and contraction, and can be easily applied to the cutting guide part. Therefore, the abdominal waist peripheral part 20 can be easily cut by operating the coupling part 5 .

The abdominal waist peripheral portion 20 provided with the fixing portion F1 is preferably a portion that is a predetermined distance from the cutting guide portion toward the front end side of the coupling portion 5 and is preferably coated with an adhesive. Generally speaking, the portion of the abdominal waist peripheral portion 20 to which the adhesive is applied has higher rigidity than the portion to which the adhesive is not applied. Therefore, among the abdominal waist peripheral portions 20 , the adhesive is applied to a portion at a predetermined distance from the cutting guide portion toward the front end side of the coupling portion 5 , thereby increasing the rigidity of the portion at the predetermined distance. This is useful for the wearer and the like for cutting. The force when the abdominal waist peripheral portion 20 grasps the coupling portion 5 and pulls it apart is easily applied to the cutting guide portion (fixing portion F1), thereby making it easier to pull the abdominal waist peripheral portion 20 apart by pulling the coupling portion 5 apart. of cutting off.

The adhesive applied to the abdominal waist peripheral portion 20 may be an adhesive such as a hot melt adhesive that fixes each member such as the skin side sheet 21 or the non-skin side sheet 22, and is not intended to adhere members to each other. Adhesives for coating can also be used. Furthermore, the "predetermined distance" for applying the adhesive can be set to any length. However, the longer (wider) the area with the coating bonding portion adjacent to the cutting guide portion (fixed portion F1) from the front end side (the other side) in the left-right direction, the easier it is for the force applied to the coupling portion 5 to be Since the cutting guide is applied to the cutting guide, the "predetermined distance" of the coating bonding portion of the diaper 1 in this embodiment is longer than the distance from the cutting guide to the front end of the joining portion 5 .

===Other implementation forms=== The first embodiment has been described above. However, the above-mentioned embodiment is intended to facilitate understanding of the present invention and is not intended to limit the interpretation of the present invention. In addition, the present invention can be changed or improved within the scope that does not deviate from the gist of the invention, and the present invention naturally includes such equivalents.

In the above embodiment, the connecting part 5 and the abdominal waist peripheral part 20 are fixed with the fixing part F1 so that the engaging part 51 is engaged with the non-skin side of the abdominal waist peripheral part 20, but the invention is not limited to this. The coupling part 5 and the abdominal waist peripheral part 20 may be fixed with the fixing part F1, and the engaging part 51 may be engaged with the non-skin side surface of the back waist peripheral part 30. Furthermore, the coupling part 5 and the dorsal waist peripheral part 30 may be fixed with the fixing part F1, and the engaging part 51 may be engaged with the non-skin side of the ventral waist peripheral part 20 or the non-skin side of the dorsal waist peripheral part 30 .

In the above-described embodiment, the coupling portion 5 is provided on one side of the left-right direction of the diaper 1, that is, the wearer's left side, but the invention is not limited to this. The coupling portion 5 may be provided on the other side of the diaper 1 in the left-right direction, that is, on the wearer's right side. For example, if the wearer is right-handed, the coupling part 5 can be provided on one side of the left-right direction of the diaper 1 (the left side of the wearer), thereby improving the operability of the coupling part 5 for the wearer.

Moreover, in the above-mentioned embodiment, the diaper 1 is provided with the coupling part 5 fixed by the fixing part F1 which is the cutting guide part on one side in the left-right direction, and is joined by the coupling part 2b on the other side in the left-right direction. The waist peripheral parts 20 and 30 have a structure without the coupling part 5, but it is not limited to this. The diaper 1 is provided with a joining portion 5 fixed by a fixing portion F1 which is a cutting guide portion on one side in the left-right direction, and is also provided with a joining portion 2b for joining the waist peripheral portions 20 and 30 on the other side in the left-right direction. It also has a coupling part fixed by a cutting guide part, that is, a fixing part, or it does not have the coupling part 2b on the other side in the left-right direction, but a so-called fastening tape is provided on either one of the waist peripheral parts 20 and 30. Yes.

In the above-described embodiment, the fixed portion F1 is continuous from the upper end to the lower end of the abdominal waist peripheral portion 20, and the entire fixed portion F1 is a cut guide portion, but the invention is not limited to this. The fixing part F1 may be discontinuous, the fixing part F1 may not be provided to the upper end or lower end of the abdominal waist peripheral part 20 , or a part of the fixing part F1 may be a cutting guide part. For example, the fixed portion F1 may be discontinuous, the linear fixed portion F1 may be branched in the middle, or a part of the fixed portion F1 may constitute a cutting guide portion.

In the above-mentioned embodiment, regarding the cutting guide part (fixed part F1), the angle θ between the upper inclined part fa1 and the lower inclined part fb1 on the base end side of the coupling part 5 is an obtuse angle, but it is not limited to this. Regarding the cutting guide portion (fixed portion F1), the angle θ between the upper inclined portion fa1 and the lower inclined portion fb1 on the base end side of the coupling portion 5 may be an acute angle. By making the angle θ an acute angle, when the wearer or the like applies a cutting force to the cutting guide part, the force will first be concentrated on the cutting guide starting point K. This concentrated force is smaller than when the angle θ is an obtuse angle. It is easy to propagate to the upper slope part fa1 and the lower slope part fb1 which have a high slope with respect to the up-down direction, and it becomes easy to cut|disconnect the cutting guide part.

In the above embodiment, the cutting guide portion has an upper inclined portion fa1 that is inclined toward the upper side and the base end side from the cutting guide starting point K and an upper inclined portion fa1 that is inclined toward the lower side and the base end side from the cutting guide starting point K. The shape of the lower inclined portion fb1 is, however, not limited to this. FIG. 11 is a diagram illustrating a modified example of the cutting guide part. In FIG. 11 , illustration of the auxiliary fixing part F2 , the engaging part 51 and the like is omitted. As shown in FIG. 11A , the cutting guide portion (fixed portion F1 ) may have a shape such that the cutting guide starting point K is located at the upper end (or lower end) of the abdominal waist peripheral portion 20 and has an inclined portion. Moreover, as shown in FIG. 11B , the cutting guide portion (fixed portion F1 ) has an inclined portion that is inclined from the upper end (cutting guide starting point K) of the abdominal waist peripheral portion 20 toward the lower side and the base end side. , the shape of the inclined portion may be inclined from the lower end (cutting guide starting point K) of the abdominal waist peripheral portion 20 toward the upper side and the base end side. The form shown in FIG. 11B is further modified. As shown in FIG. 11C , a cutting guide starting point K is provided at the center portion in the up-down direction of the coupling portion 5 , and has a curved shape from the cutting guide starting point K toward the upper side and the base end. A curved portion or a cutting guide portion (fixed portion F1) of a curved portion bent from the cutting guide starting point K toward the lower side and the base end side may be used. In addition, the cutting guide portion may have a shape along the up-down direction (not shown).

Moreover, as mentioned above, the diaper 1 can be held by grasping the abdominal waist peripheral part 20 with one hand and the connecting part 5 with the other hand, respectively, and pulling them outward in the left and right directions, whereby the abdominal waist peripheral part can be pulled apart. The part 20 is cut along the cutting guide part. In FIGS. 6A and 6B , the hand holding the abdominal waist peripheral part 20 and the other hand holding the connecting part 5 are pulled apart horizontally (parallel to the width direction of the diaper 1 ) to concentrate the force. The abdominal waist peripheral portion 20 is cut along the cutting guide portion (fixed portion F1) from the cutting guide starting point K located at the most front end side of the coupling portion 5, but this is not limited to This cut off. For example, the front end of the connecting portion 5 is pulled open with the front end of the connecting portion facing diagonally downward, or the front end of the connecting portion 5 is pulled open with the front end of the connecting portion facing diagonally upward, etc., and the abdominal waist can be performed by pulling the connecting portion 5 in any direction. The peripheral part 20 may also be cut.

FIG. 12 is a diagram illustrating a modified example of the cutting guide part. FIG. 12 is a diagram showing a modified example of the part The structure of the cutting guide part (fixing part F1) which is different from the above-mentioned diaper 1 is mainly demonstrated.

Also in the form shown in FIG. 12 , the fixing portion F1 that fixes the abdominal waist peripheral portion 20 and the coupling portion 5 functions as a cutting guide portion. As shown in FIG. 12 , the end CE on the other side (front end side) of the fixed portion F1 may have an uneven portion. The fixed portion F1 shown in Fig. 12 has a recessed portion fx that is recessed (recessed) toward one side (base end side) in the left-right direction at the other end CE, and is recessed (recessed) toward the other side (front end side) in the left-right direction. The convex portions fy protruding from the portion side) are provided alternately throughout the entire area of the fixed portion F1 in the up and down direction. The recessed portion fx and the convex portion fy (concave-convex portion) make it easy to set the cutting guide starting point K and to easily cut the abdominal waist peripheral portion 20 from the cutting guide starting point K with the cutting guide portion (fixed portion F1).

In the cutting guide part (fixed part F1) shown in FIG. 12, the recessed part fx and the convex part fy (concave-convex part) are such that the boundary between the recessed part fx and the convex part fy is the cutting guide starting point K. Since the fixed part F1 shown in FIG. 12 has a plurality of recessed parts fx and a plurality of convex parts fy, the cutting guide part has a plurality of cutting guide starting points K. For example, the wearer grasps the abdominal waist peripheral portion 20 with one hand and the coupling portion 5 with the other hand, and moves in the direction of the arrow PLa in FIG. 12 (towards one side (the base end side) in the left-right direction). When the coupling part is pulled apart in the lower direction), the boundary between the recessed part fx and the convex part fy provided in the fixed part F1 of the coupling part 5 and located above the center in the up-down direction becomes a cutoff It guides the starting point K and makes it easy to cut with the cutting guide part. Then, the wearer, etc., grasps the abdominal waist peripheral part 20 with one hand and the connecting part 5 with the other hand, and moves in the direction of the arrow PLb in FIG. 12 (towards one side (the base end side) in the left-right direction). When the coupling part 5 is pulled apart (in the upper direction), the boundary between the concave part fx and the convex part fy provided in the fixed part F1 of the coupling part 5 and located below the center in the up-down direction becomes a tangent. It is easy to cut by cutting the guide starting point K. The cutting guide part (fixed part F1) shown in FIG. 12 is provided with a plurality of recessed parts fx and convex parts fy alternately throughout the entire area of the fixed part F1 in the up and down direction, and is provided with a plurality of cutting guide starting points K. , therefore, the direction of opening the joint part 5 is not limited to the directions PLa and PLb. The cutting guide starting point K corresponding to the direction in which the joint part 5 is opened by the wearer, etc. is used as the cutting starting point, so that the ventral side can be easily cut. Waist peripheral part 20.

The cutting guide part (fixed part F1) may have a structure as shown in FIGS. 13A and 13B. FIG. 13 is a diagram illustrating a modified example of the cutting guide part. In FIGS. 13A and 13B , only the shape of the fixing part F1 (cutting guide part) is shown. As shown in FIG. 13A , the cutting guide part (fixed part F1 ) may have a convex part fy protruding toward the other side in the left-right direction (the front end side), and may be located further in the left-right direction than the convex part fy The concave portion fx on the side (base end side). Moreover, similarly as shown in FIG. 13B , the cutting guide portion (fixed portion F1 ) may have a recessed portion fx that is recessed toward one side (the base end side) in the left-right direction, and a recessed portion fx that is recessed toward the other side in the left-right direction. (Top end side) protruding convex portion fy. The fixed portion F1 shown in FIGS. 13A and 13B has a plurality of recessed portions fx and a plurality of convex portions fy alternately provided in the entire area of the fixed portion F1 in the up and down direction. The cutting guide starting point K in FIGS. 13A and 13B is the vertex on the front end side of each convex part fy.

The same applies to the cutting guide portion (fixing portion F1) shown in Figs. 13A and 13B. The wearer, etc., grasps the abdominal waist peripheral portion 20 with one hand and the connecting portion 5 with the other hand, and moves to Figs. 13A and 13B. When the coupling part is pulled apart in the direction of the arrow PLa in FIG. 13B (the direction toward one side (the base end side) and the lower side of the left-right direction), the fixing part F1 of the coupling part 5 is provided in the up and down direction. The portion above the center (upper inclined portion fa1) becomes the cutting guide starting point K. In addition, the wearer, etc., grasps the abdominal waist peripheral part 20 with one hand, grasps the coupling part 5 with the other hand, and moves in the direction of the arrow PLb in FIGS. 13A and 13B (toward one side (the base end) in the left-right direction). When the joint part is pulled apart (part side) and the upper direction), the part (lower inclined part fb1) provided in the fixed part F1 of the joint part 5 that is lower than the center in the up-down direction becomes a cut Guide starting point K. The fixed portion F1 shown in FIGS. 13A and 13B is also provided with a plurality of recessed portions fx and convex portions fy alternately throughout the entire area of the fixed portion F1 in the up and down direction, similarly to the fixed portion F1 shown in FIG. 12 . Furthermore, there are a plurality of cutting guide starting points K, so the direction of opening the joint part 5 is not limited to the directions PLa and PLb. The cutting guide starting point K corresponding to the direction in which the joint part 5 is opened by the wearer etc. is used as the cutting guide starting point K. By cutting the starting point, the abdominal waist peripheral portion 20 can be easily cut.

In the above embodiment, the diaper is exemplified as a diaper in which the abdominal waist peripheral portion 20 and the back waist peripheral portion 30 are separate and different components. However, a cross-down portion is provided between the abdominal waist peripheral portion 20 and the back waist peripheral portion 30 . , the abdominal waist peripheral portion 20 and the dorsal waist peripheral portion 30 may be formed into a continuous single member.

===Second implementation form=== Hereinafter, embodiments of the absorbent article of the present invention will be explained taking, as an example, an undergarment-type disposable diaper for infants. However, the absorbent article of the present invention is not limited to disposable diapers for infants and can also be used in disposable diapers, menstrual pants, etc. for adults.

===Structure of disposable diaper 1=== Fig. 14 is a perspective view of the disposable diaper 1 (hereinafter referred to as "diaper") in a worn state according to the second embodiment, viewed from one side in the left-right direction. FIG. 15 is a top view of the diaper 1 in a natural state as viewed from the abdominal waist peripheral portion 20 side. FIG. 16 is a top view of the diaper 1 in an unfolded and stretched state, viewed from the non-skin side side. The center line C-C in Figure 16 and others is the center line in the left-right direction in the extended state. Moreover, FIG. 16 shows the unfolded and extended state of the panty-type diaper 1 shown in FIGS. 14 and 15 . In the following, the center line C-C in the left-right direction of the diaper 1 in each figure is the center line in the extended state.

The "natural state" refers to the state when the diaper 1 is left for a predetermined time. For example, the diaper 1 in the product state is taken out of the package, the back waist peripheral portion 30 is pulled outward in the left and right directions, so that the waist peripheral portions 20 and 30 are in an "extended state", and the stretched state is continued for 15 seconds. , unstretch the diaper 1 and place it on a flat surface such as a table. Then, the state after being left on such a flat surface for 5 minutes was designated as the natural state.

The "expanded state" refers to the joining portion 2 a of both sides of the diaper 1 in the panty-type state, that is, the both side ends of the abdominal waist peripheral portion 20 and the both side ends of the back waist peripheral portion 30 , 2b are separated respectively and spread out to unfold the entire diaper 1 into a flat state. The "stretched state" refers to a state in which the stretchable member included in the diaper 1 is stretched to an extent that wrinkles in the diaper 1 are no longer visible. Specifically, it means a state in which the size of each member constituting the diaper 1 (for example, the abdominal waist peripheral portion 20 described below) is extended to a size that is consistent with or close to the size of the member alone.

The diaper 1 has an up-down direction, a left-right direction, and a front-back direction in the panty-type state shown in FIGS. 14 and 15, and is formed with a waist peripheral opening BH and a pair of leg peripheral openings LH. In the up-down direction, the waist peripheral opening BH side is the upper side, and the span lower side is the lower side. In the front-to-back direction, the wearer's ventral side is the front side, and the wearer's back side is the rear side. In addition, the direction in which the materials constituting the diaper 1 are laminated is called the thickness direction, the side in contact with the wearer in the thickness direction is called the skin side, and the side opposite to the skin side is called the non-skin side. In addition, the thickness direction is also the direction along the front-to-back direction in the natural state.

The diaper 1 on the underwear side is a so-called three-piece type and has an absorbent main body 10, an abdominal waist peripheral part 20, and a back waist peripheral part 30. The ventral waist peripheral portion 20 covers the wearer's ventral side, and the dorsal waist peripheral portion 30 covers the wearer's back. The diaper 1 also has a connecting portion 5 .

In the unfolded state of the diaper 1 shown in FIG. 16 , the abdominal waist peripheral portion 20 and the back waist peripheral portion 30 are arranged so that their longitudinal directions follow the left-right direction of the diaper 1 . Then, one end of the absorbent main body 10 in the longitudinal direction is arranged at the center of the abdominal waist peripheral portion 20 in the left and right direction, and an absorbent is arranged at the central portion of the back waist peripheral portion 30 in the left and right direction. The other end of the main body 10 in the longitudinal direction forms the lower span 40 . The absorbent main body 10 is arranged closer to the skin than the abdominal waist peripheral portion 20 and the back waist peripheral portion 30 .

The diaper 1 in the unfolded state shown in Figure 16 is folded in half at approximately the center CL in the longitudinal direction of the absorbent body 10 with the longitudinal direction of the absorbent body 10 along the up and down direction of the diaper 1, and the diaper 1 is The two side ends of the ventral waist peripheral portion 20 and the two side ends of the dorsal waist peripheral portion 30 in the left and right directions are joined by heat welding or ultrasonic welding to form a pair of joint portions 2a and 2b. This becomes the diaper 1 in the panty-type state shown in FIGS. 14 and 15 . The joint portion 2a is a joint portion provided on one side in the left-right direction, and the joint portion 2b is a joint portion provided on the other side in the left-right direction.

The absorbent main body 10 includes an absorbent body 11, a liquid-permeable surface sheet 12 disposed closer to the skin than the absorbent body 11, a second sheet 13 disposed between the surface sheet 12 and the absorbent body 11, and a liquid-permeable surface sheet 12 disposed closer to the skin than the absorbent body 11. The side sheets 14 are arranged on the skin side of the absorbent body 11 and the second sheet 13. The liquid-impermeable back sheet 15 is arranged on the non-skin side than the absorbent body 11. The liquid-impermeable back sheet 15 is arranged on the non-skin side than the back layer sheet 15. Exterior sheet 16 on the skin side.

The absorbent body 11 has a substantially rectangular shape in plan view and includes an absorbent core A that absorbs and retains excretion fluids such as urine, and a liquid-permeable core-covering sheet (not shown) that covers the absorbent core. Examples of the absorbent core A include liquid-absorbent fibers such as pulp containing superabsorbent polymer (SAP) formed into a predetermined shape, for example, a substantially hourglass shape when viewed from above (formed product of liquid-absorbent fibers) , forming the super absorbent polymer (SAP) into a sheet shape, so-called SAP sheet. Furthermore, the absorbent core 11A may be a SAP sheet and a molded article of liquid-absorbent fiber stacked in the thickness direction. For example, the SAP sheet, the molded article of liquid-absorbent fiber, and The absorbent core 11A composed of SAP sheets may also be used. The length of the absorbent core 11A of the diaper 1 in the left-right direction is almost the same as the length of the absorbent core 11 in the left-right direction. Examples of the core-covered sheet include liquid-permeable sheets such as toilet paper and nonwoven fabrics. Alternatively, the structure may not include a core-covering sheet.

As shown in FIG. 16 , the leg peripheral elastic members 17 provided on both sides of the absorbent main body 10 in the left-right direction constitute leg elastic bands. The leg elastic bands of the panty-type diaper 1 are provided along the leg periphery openings LH. The expansion and contraction of the leg periphery elastic members 17 allows the diaper 1 to be in close contact with the wearer's leg periphery. A plurality of rubber cords are used for the elastic members 17 around the legs of the diaper 1, for example, between the exterior sheets 16 that are folded inwards in the left and right directions to form two layers, and between the back layer sheet 15 and the exterior sheet 16. During this time, the absorbent main body 10 is fixed in a state of being extended in the longitudinal direction.

On both sides of the absorbent main body 10 in the left-right direction, there are leakage-proof wall elastic members 18 on the inside of the leg peripheral elastic members 17 . Between the side sheets 14 that are folded outward in the left-right direction and formed into two layers, a plurality of leakage-proof wall telescopic members 18 are fixed in a state of being extended in the longitudinal direction to form a pair of leak-proof wall elastic members 18 along the longitudinal direction. Leaky wall part. When the diaper 1 is worn, the elasticity exerted by the leakage-proof wall elastic member 18 causes the leakage-proof wall portion to stand up toward the wearer's skin side and closely adhere to the wearer's crotch area.

Examples of the leg peripheral elastic members 17 and the leakage-proof wall elastic members 18 include rubber cords, elastic sheets, and the like.

The abdominal waist peripheral portion 20 includes a skin side sheet 21, a non-skin side sheet 22, and a plurality of elastic members 23. The skin side sheet 21 and the non-skin side sheet 22 are joined by a joining means such as an adhesive such as hot melt glue or welding by heat or ultrasonic waves. The skin-side sheet 21 and the non-skin-side sheet 22 are sheet members of substantially the same size and substantially the same shape. In this embodiment, they have a substantially rectangular shape. The non-skin side sheet 22 is arranged on the non-skin side of the skin side sheet 21 . As the skin side sheet 21 and the non-skin side sheet 22, you can use: SMS nonwoven fabric (spunbond, meltblown, spunbond nonwoven fabric), spunbond nonwoven fabric, hot air nonwoven fabric, spot bonded nonwoven fabric, stretch nonwoven fabric, plastic sheet, perforated plastic sheet and non-stretchable sheets of such laminated sheets.

The plurality of elastic members 23 of the abdominal waist peripheral portion 20 are arranged side by side in the up and down direction between the skin side sheet 21 and the non-skin side sheet 22, and are fixed in a state of being extended in the left and right directions. Thereby, the abdominal waist peripheral portion 20 expands and contracts in the left and right directions to closely adhere to the wearer's waist periphery. Examples of the elastic member 23 include elastic members such as rubber or elastic fiber. On the non-skin side of the non-skin-side sheet 22, there is an engaged portion 25 to which an engaging portion 51 (described later) can engage. The engaged portion 25 is a so-called target area, and an example thereof is a nonwoven sheet. Furthermore, if a hook member of Velcro felt is used for the engaging portion 51 , a loop member of Velcro felt is used for the engaged portion 25 , and the engaged portion corresponding to the engaging portion 51 is preferably selected. In addition, as the engaged portion 25, no other member is provided on the non-skin side of the non-skin-side sheet 22, but the non-skin-side sheet 22 made of a member (for example, nonwoven fabric) that can be engaged with the engaging portion 51 is used. It can also be directly engaged with the non-skin side of the non-skin side sheet 22.

The back waist peripheral portion 30 includes a skin side sheet 31, a non-skin side sheet 32, and a plurality of elastic members 33. The skin-side sheet 31 and the non-skin-side sheet 32 are joined by a joining means such as an adhesive such as hot melt glue or heat or ultrasonic welding. The skin-side sheet 31 and the non-skin-side sheet 32 are sheet members of substantially the same size and substantially the same shape. In this embodiment, they have a substantially rectangular shape. The non-skin side sheet 32 is arranged on the non-skin side of the skin side sheet 31 . As the skin side sheet 31 and the non-skin side sheet 32, for example, polypropylene SMS nonwoven fabric (spunbond, meltblown, spunbond nonwoven fabric), spunbond nonwoven fabric, air-through nonwoven fabric, point-bonded nonwoven fabric, stretch nonwoven fabric, plastic sheet, Non-stretchable sheets of perforated plastic sheets and laminated sheets thereof.

The plurality of elastic members 33 of the back waist peripheral portion 30 are arranged side by side in the up and down direction between the skin side sheet 31 and the non-skin side sheet 32, and are fixed in a state of being extended in the left and right directions. Thereby, the ventral waist peripheral portion 20 and the dorsal waist peripheral portion 30 each expand and contract in the left and right directions to closely adhere to the wearer's waist periphery. Examples of the elastic members 23 and 33 include elastic members made of rubber, elastic fiber, or the like.

The coupling part 5 is a so-called tag (grabbing part) member, and is a member used to form a waist peripheral opening when the abdominal waist peripheral part 20 is cut. Fig. 17 is an enlarged view of part X in Fig. 16. In the coupling part 5 of this embodiment, the proximal end part (one side in the left-right direction in FIG. 16 etc.) of the coupling part 5 is fixed to one side further than the center in the left-right direction of the abdominal waist peripheral part 20, and the front end part (Fig. 16 etc.) 16 and so on) has an engaging portion 51 that is detachably engaged with the non-skin side of the abdominal waist peripheral portion 20 .

The joint part 5 is a gripping part that the wearer or a person who puts on the diaper 1 for the wearer (hereinafter also referred to as "the wearer") performs a grabbing action. The joint part 5 itself has a strength that does not break. good. As the joining part 5 , for example, various films such as plastic films and nylon films, nonwoven fabrics, and films obtained by laminating nonwoven fabrics can be used. The joint part 5 of the diaper 1 in this embodiment is a sheet-like member made of three layers of nonwoven fabric of the same size stacked on both sides of a plastic film.

The engaging portion 51 is provided on the skin side of the coupling portion 5 and is a member that is detachably engaged with the non-skin side of the abdominal waist peripheral portion 20 (specifically, the engaged portion 25 ). Examples of the engaging portion 51 include a hook member of Velcro felt or an adhesive material such as an adhesive sheet. The engaging portion 51 of this embodiment has a substantially rectangular shape, but may also have any shape such as a circle.

As shown in FIG. 17 and others, the coupling portion 5 is fixed to the abdominal waist peripheral portion 20 via the fixing portion F1 and the auxiliary fixing portion F2. The fixing part F1 and the auxiliary fixing part F2 of this embodiment are welding parts formed by joining the joint part 5 and the abdominal waist peripheral part 20 in the thickness direction by thermal welding or ultrasonic welding. The coupling part 5 is mainly fixed to the abdominal waist peripheral part 20 by the fixing part F1, and the auxiliary fixing part F2 is fixed by the auxiliary fixing part F1.

===About how to wear diaper 1=== Diapers 1 can be worn in multiple ways. For example, a general panty-type diaper (see FIG. 14 ) allows the wearer's feet to enter the leg peripheral opening LH from the waist peripheral opening BH, so that the waist peripheral parts 20 and 30 surround the wearer's waist periphery. Pull it up to make it wearable.

Furthermore, after wearing the panty-type disposable diaper as described above, the abdominal waist peripheral portion 20 is cut with a cutting guide (described later), and the engaging portion 51 of the coupling portion 5 is engaged with the abdominal waist peripheral portion. 20. An opening is formed around the waist so that it can be worn. Thereby, the engaging position of the engaging portion 51 can be adjusted to easily fit closely around the wearer's waist.

In addition, the abdominal waist peripheral part 20 is cut in advance with the cutting guide part, so that one side in the left-right direction is in the form of a so-called adhesive diaper (a state in which the leg peripheral openings LH are not formed), and the other side in the left-right direction is made into a so-called adhesive diaper. It can also be worn in the form of a panty-type diaper (with openings LH around the legs).

First, the abdominal waist peripheral portion 20 is cut with the cutting guide portion, and the wearer's other foot (the wearer's right foot in the case of the diaper 1) passes through the other side in the left-right direction (in the form of a panty-type diaper). ) of the leg peripheral opening LH, and then pull the diaper 1 up to the wearer's crotch area, and then engage the engaging portion 51 of the connecting portion 5 on the abdominal side in a manner that it closely adheres to the wearer's waist periphery. The waist peripheral portion 20 forms a waist peripheral opening, whereby the wearer is in a worn state.

By wearing it in this way, for example, even for infants whose feet move around and it is difficult to pass the legs through the leg peripheral openings LH on both sides of the panty-type disposable diaper, as long as the wearer can pass one leg through the legs. The peripheral opening LH is then engaged with the coupling portion 5 (engagement portion 51), thereby making it easy to put it into a wearing state. Moreover, when the wearer himself wears the diaper 1, it may be difficult to wear a general adhesive type diaper (a diaper with tape on both sides in the left and right directions) in the toilet, etc., but one side in the left and right directions is the underwear. The other side has a connecting portion 5 (adhesive type), making it easy to put on and adjust the tightness around the waist.

Furthermore, when the used diaper 1 is removed from the wearer's body, the abdominal waist peripheral portion 20 is separated by the cutting guide, one side of the left-right direction of the diaper 1 is removed from the wearer's body, and the other side is removed from the wearer's body. The diaper 1 can be removed from the wearer's body by pulling out the leg peripheral opening LH on the other side in the left-right direction.

===About cutting off the abdominal waist peripheral part 20=== Cutting of the abdominal waist peripheral portion 20 will be described using FIGS. 18 and 19 . FIG. 18 is a diagram illustrating the separation of the abdominal waist peripheral portion 20 and the formation of the waist peripheral opening. FIG. 19 is a diagram explaining the cutting operation of the abdominal waist peripheral portion 20 . FIG. 18 is a diagram illustrating the structure of a cross section taken along the A-A arrow in FIG. 17 . In addition, FIG. 18 and FIG. 19 are schematic diagrams, and the dimensions and the like are not necessarily correct.

Fig. 18A shows the diaper 1 in the panty-type state shown in Fig. 14 and others. That is, the abdominal waist peripheral portion 20 is not cut, but a waist peripheral opening is formed to connect the abdominal waist peripheral portion 20 and the dorsal waist peripheral portion 30 through the joint portions 2a and 2b. From the state shown in FIG. 18A , the state in which the front end of the coupling portion 5 is grasped and pulled toward the non-skin side is shown in FIGS. 18B and 19A .

Then, as shown in FIG. 19A , grasp the waist peripheral part 20 with one hand and the connecting part 5 with the other hand, and pull them outward in the left and right directions respectively, as shown in FIGS. 18C and 19B . The abdominal waist peripheral portion 20 is cut along the cutting guide portion to separate one side from the other side in the left-right direction. The "cutting guide portion" refers to a guide portion when cutting at least a part of the abdominal waist peripheral portion 20 . In the diaper 1, the fixing part F1 which fixes the abdominal waist peripheral part 20 and the coupling part 5 functions as a cutting guide part. Specifically, as shown in FIG. 19A , if the abdominal waist peripheral part 20 and the connecting part 5 are respectively grasped and pulled apart in the left and right directions, first, the pulling force will be concentrated on the cutting guide part (fixing part F1 ), the end on the front end side of the most distal end side is the cutting guide starting point K, and then along the inclined portion that is inclined from the cutting guide starting point K of the cutting guide portion toward the upper side and the base end side The force is transmitted to the inclined portion inclined from the cutting guide starting point K toward the lower side and toward the base end side. Then, the abdominal waist peripheral portion 20 is cut with the other left-right end CE of the fixed portion F1 as a boundary, and the abdominal waist peripheral portion 20 is separated into one side without the coupling portion 5 part and the part on the other side provided with the coupling part 5 .

Thereafter, if necessary, as shown in FIG. 18D , the engaging portion 51 of the coupling portion 5 is engaged with the engaged portion 25 of the abdominal waist peripheral portion 20 , thereby forming a waist peripheral opening of the diaper 1 . In a state where the engaging portion 51 is engaged with the engaged portion 25, one portion and the other portion in the left-right direction of the separated abdominal waist peripheral portion are overlapped in the front-rear direction (thickness direction) to engage. The engaging portion 51 may be engaged with the engaged portion 25 so that one portion and the other portion of the left-right direction of the separated abdominal waist peripheral portion do not overlap in the front-rear direction (thickness direction). It may also be engaged with the engaged part 25. By adjusting the engaging position of the engaging portion 51, the size of the opening around the waist of the diaper 1 can be adjusted.

===About cutting the guide part=== As described above, in the diaper 1, the left and right side end portions of the abdominal waist peripheral portion 20 and the back waist peripheral portion 30 are joined by the joint portions 2a and 2b respectively. Furthermore, the base end of the coupling part 5 is connected to the abdominal waist peripheral part 20, and the front end part of the coupling part 5 has an engaging part 51 that is detachably engaged with the non-skin side of the abdominal waist peripheral part 20. Furthermore, the abdominal waist peripheral portion 20 has a cutting guide portion. The cutting guide portion is provided at a different position from the joint portions 2a and 2b provided at both ends in the left and right direction, and at least a part of the abdominal waist peripheral portion 20 is a melted portion F1.

FIG. 20A is a diagram explaining the cutting guide part of the diaper 1 . Fig. 20B is a diagram explaining the cutting guide portion of the tear line. FIG. 20A is an enlarged view of part Y in FIG. 18A , and FIG. 20B is an enlarged view of the part provided with a tear line at the abdominal waist peripheral portion of a general disposable diaper. The cutting guide portion of the diaper 1 is a portion where the abdominal waist peripheral portion 20 is melted.

In the diaper 1, as shown in Fig. 17 and others, if the abdominal waist peripheral portion 20 and the connecting portion 5 are pulled apart in the left and right directions respectively, the other side of the melting portion F1 (cutting guide portion) in the left and right direction will The abdominal waist peripheral portion 20 is cut using the side end CE as a boundary.

As mentioned above, tear lines and the like are known as conventional cutting guide portions. As shown in FIG. 20B , regarding the cutting guide portion formed by the tear line M, there are holes or fewer fibers in the skin-side waist peripheral portion of the portion where the tear line M is located. For parts that are easily damaged. Therefore, during the manufacturing process or transportation of disposable diapers, or when a wearer or the like uses the diaper 1, there is a risk that the cutting guide portion may tear the abdominal waist peripheral portion against the wearer or the like's intention. On the other hand, as shown in FIG. 20A , the melted portion F is a portion where the fibers are melted and fixed, and the total amount of fibers is not reduced. Therefore, by using the melted portion F1 as a cutting guide portion, cutting can be performed when the operation is performed for the purpose of cutting, and when there is no intention of cutting, it is possible to reduce the risk of cutting the wearer or the like against the intention of the wearer. There is a risk that the cutting guide portion may tear the abdominal waist peripheral portion 20 .

In addition, the melted portion F1 is provided at a different position from the joint portions 2a and 2b. Therefore, the abdominal waist peripheral portion 20 and the dorsal waist peripheral portion 30 are not joined at the melted portion F1.

The melting portion F1 of the diaper 1 is a fixing portion F1 that fixes the abdominal waist peripheral portion 20 and the joint portion 5 by welding them together. In this embodiment, the fixed part F1 is also called "the melting part F1". That is, the melting portion F1 is a portion that melts at least a portion of the abdominal waist peripheral portion 20 and melts at least a portion of the coupling portion 5 so that the abdominal waist peripheral portion 20 and the coupling portion 5 are welded ( Welding part) to fix the fixing part F1. The melting part F1 functioning as the cutting guide part is also the fixing part F1. This eliminates the need to separately provide the fixing part F1 and the melting part F1, and the diaper 1 can be manufactured in a manufacturing process that simplifies the welding process.

The diaper 1 of this embodiment is provided with a cutting guide part (melting part F1, fixing part F1) in the abdominal waist peripheral part 20. The cutting guide portion provided in the abdominal waist peripheral portion 20 is preferably continuous in the vertical direction from the upper end to the lower end of the abdominal waist peripheral portion 20 . That is, it is preferable that the melting part F1 (fixed part F1) which is a cutting guide part is continuous from the upper end of the abdominal waist peripheral part 20 to the lower end. The cutting guide portion formed by the melted portion F1 that melts the abdominal waist peripheral portion 20 can reduce the risk of tearing the abdominal waist peripheral portion 20 against the intention of the wearer or the like. In the event that the wearer or the like intentionally cuts the abdomen. In the case of the side waist peripheral portion 20, the cutting guide portion is continuous from the upper end to the lower end of the abdominal waist peripheral portion 20. Compared with the case where the cutting guide portions are not connected, it is easier to cut the abdomen along the cutting guide portion. The side waist peripheral portion 20 makes it easy to completely separate the abdominal waist peripheral portion 20 .

Furthermore, it is preferable that the cutting guide portion has a portion inclined in the up-down direction, and the entire cutting guide portion is preferably inclined in the up-down direction. FIG. 21 is an enlarged view of the melting part F1 and the auxiliary melting part F2. In FIG. 21 , the end CE on the other side of the melted portion F1 serving as the boundary is indicated by a thick line. The cutting guide portion of the diaper 1 of this embodiment has inclined portions fa1 and fb1 that are inclined in the up-down direction from the end K on the frontmost end side toward the base end side. By inclining the cutting guide portion with respect to the up-down direction, the risk of the abdominal waist peripheral portion 20 being torn by the cutting guide portion against the intention of the wearer or the like can be reduced compared to a case where the cutting guide portion is parallel to the up-down direction. In addition, the cutting guide portion inclined with respect to the up-down direction is not limited to the linear inclined portions fa1 and fb1 of the diaper 1, and may be a portion provided with a curved portion.

As shown in FIG. 21 , among the cutting guide portions (melting portion F1 ), the end K on the frontmost side is the cutting guide starting point K. The cutting guide starting point K is the part where the force is most likely to concentrate when a force is applied to the abdominal waist peripheral part 20 and the coupling part 5 in order to cut the abdominal waist peripheral part 20 with the cutting guide part, and is also the cutting point. The easiest part to start with. Furthermore, it is preferable that the cutting guide portion has an upper inclined portion fa1 and a lower inclined portion fb1. The upper inclined portion fa1 is an inclined portion inclined from the end K on the frontmost end side (cutting guide starting point) toward the upper side and the base end side, and the lower inclined portion fb1 is an inclined portion inclined from the end K on the frontmost end side (Cutting guide starting point) An inclined portion inclined toward the lower side and the base end side. Thereby, the force when the wearer or the like separates the abdominal waist peripheral portion 20 and the coupling portion 5 is first easily concentrated on the cutting guide starting point K, and the force is easily transmitted from the cutting guide starting point K to the upper inclination The portion fa1 and the lower inclined portion fb1 make it easy to cut the abdominal waist peripheral portion 20 .

Furthermore, among the angles between the upper inclined portion fa1 and the lower inclined portion fb1, it is preferable that the angle θ on the base end side in the left-right direction is an obtuse angle (an angle larger than 90 degrees and smaller than 180 degrees). Thereby, compared with the case where θ is an acute angle, the risk of breakage of the abdominal waist peripheral portion 20 from the cutting guide starting point along the cutting guide portion can be reduced. Even if a part of the abdominal waist peripheral portion 20 is broken, the risk of breakage can be reduced. There is a risk that all the waist peripheral parts 20 may be separated.

The diaper 1 in the panty-type state before the abdominal waist peripheral portion 20 is cut with the cutting guide portion (melting portion F1), as shown in FIG. 14 , the abdominal waist peripheral portion 20 and the back waist peripheral portion 30 are The joint portions 2a and 2b are joined together to form a waist peripheral opening portion (waist peripheral opening) BH. The waist peripheral opening BH is annular, and the direction along the waist peripheral opening is a direction along the left-right direction when viewed from the abdominal waist peripheral portion 20 side. Furthermore, after cutting the abdominal waist peripheral part 20 with the cutting guide part, the engaging part 51 of the coupling part 5 is engaged with the non-skin side of the abdominal waist peripheral part 20, thereby forming the waist peripheral opening part BH. . The waist peripheral opening BH formed by cutting the abdominal waist peripheral portion 20 with the cutting guide portion and engaging the engaging portion 51 of the coupling portion 5 with the non-skin side of the abdominal waist peripheral portion 20 is also connected to the waist peripheral opening BH. The waist peripheral opening B of the diaper 1 in the panty-type state is also annular, and the direction along the waist peripheral opening is the left-right direction when viewed from the abdominal waist peripheral portion 20 side.

It is preferable that the diaper 1 has an auxiliary melting part F2 that is different from the melting part F1. The plurality of auxiliary melting portions F2 melt at least a part of the abdominal waist peripheral portion 20 and are arranged at intervals in the up and down direction. The plurality of auxiliary melting portions F2 are preferably provided closer to the base end of the coupling portion 5 than the cutting guide portion (melting portion F1) in the direction along the waist peripheral opening.

The plurality of auxiliary melting portions F2 of the diaper 1 of this embodiment are arranged in a substantially elliptical shape at intervals along the cutting guide portion, as shown in FIGS. 17 and 21 . Moreover, the plurality of auxiliary melting portions F2 are provided closer to the base end portion of the coupling portion 5 than the melting portion F1 in the direction along the opening of the waist periphery (the left-right direction). In the diaper 1, they are provided in the left-right direction. It is one side further than the melting part F1.

The cutting guide, that is, the melted portion F1, is used to guide the cutting of the abdominal waist peripheral portion 20, and the plurality of auxiliary melted portions F2 are provided to reduce the risk of the cutting guide being used at a position contrary to the intention of the wearer or the like. The ventral waist peripheral portion 20 is cut off at the base end side of the coupling portion 5 .

In addition, the auxiliary melting part F2 of the diaper of this embodiment is also the auxiliary fixing part F2 that assists in fixing the joint part 5 and the abdominal waist peripheral part 20. The auxiliary fixing part F2 is also a welding part for welding and fixing the joint part 5 and the abdominal waist peripheral part 20. The auxiliary welding part F2 serves as the auxiliary fixing part F2 for welding the joint part 5 and the abdominal waist peripheral part 20, thereby reducing the risk of the abdominal waist peripheral part 20 being cut against the wearer's intention and strengthening the connection. The fixation of the joint part 5 and the abdominal waist peripheral part 20 can reduce the risk of the joint part 5 being peeled off from the abdominal waist peripheral part 20 .

Furthermore, as shown in FIG. 17 , it is preferable that at least a part of the plurality of auxiliary melting portions F2 has a length f2w in the left-right direction longer than a length f2t in the up-down direction (f2w>f2t). By making the length f2w of the auxiliary melting part F2 in the left-right direction longer than the length f2t in the up-down direction, compared with the case where the length f2w in the left-right direction of the auxiliary melting part F2 is shorter than the length f2t in the up-down direction, it is possible to adjust the length f2w from the left-right direction. The force applied to the abdominal waist peripheral part 20 reduces the risk of the skin side waist peripheral part 20 being broken starting from the auxiliary melting part F2.

Furthermore, the diaper 1 is provided with a plurality of protruding melted portions protruding from the melted portion F1 toward the base end side between the melted portion F1 and the auxiliary melted portion F2. The plurality of protruding melting parts are arranged at intervals in the up and down direction. This protruding melting part is also a welding part that welds the coupling part 5 and the abdominal waist peripheral part 20. Like the auxiliary melting part F2, it strengthens the fixation of the coupling part 5 and the abdominal waist peripheral part 20 by the melting part F1. , and the risk of cutting the abdominal waist peripheral portion 20 starting from the protruding melted portion can be reduced by the protruding melting portions arranged at intervals.

In addition, it is preferable that the arrangement patterns of the melting part F1 and the joining part 2a are different. The melting part F1 and the joint part 2a can be provided in an appropriate arrangement pattern according to their respective uses. The shape, size, arrangement, etc. of each joint portion 2a of the melting portion F1 can be set arbitrarily. The melting part F1 of the diaper 1 of this embodiment is a welding part formed by the linear upper inclined part fa1 and the lower inclined part fb1, as shown in Fig. 21 etc., and the joint part 2a is as shown in Fig. 17 etc. Generally, two rows are provided: a row in which a plurality of elliptical welding portions whose length in the left-right direction is longer than the length in the up-down direction are arranged at intervals in the up-and-down direction, and the welding portions in the two rows are staggered with each other.

As shown in FIGS. 14 to 16 , when the diaper 1 is viewed from the abdominal waist peripheral portion 20 side in the front-rear direction, it is preferable to cut the guide portion and have a portion overlapping the coupling portion 5 . In the diaper 1 of this embodiment, when the diaper 1 is viewed from the abdominal waist peripheral portion 20 side, the entire cutting guide portion of the abdominal waist peripheral portion 20 is covered by the coupling portion 5 . The cutting guide portion covered by the coupling portion 5 can reduce the risk of tearing against the wearer's intention compared to the exposed portion of the cutting guide portion.

Furthermore, in the abdominal waist peripheral portion 20 in which the coupling portion 5 is fixed by the fixing portion F1, as described above, the cutting guide portion is the melting portion F1 and is also the fixing portion F1. As shown in FIG. 17 , the maximum length W5e of the coupling portion 5 in the left-right direction from the fixed portion F1 to the end on the front end side is longer than the maximum length W5e in the left-right direction from the fixed portion F1 to the end on the base end side. It is better if the maximum length of W5b is longer (W5e>W5b). The cutting guide part is a melted part, thereby reducing the cutting of the abdominal waist peripheral part 20 against the intention of the wearer, etc. The melted part F1 is the cutting guide part and also the fixing part F1, so it can be cut along the cutting guide When cutting the abdominal waist peripheral portion 20 by grasping the front end portion of the coupling portion 5, the wearer can easily grasp the front end portion of the coupling portion 5 and cut the abdominal waist peripheral portion 20 easily. of cutting off.

In addition, as shown in FIG. 17 and others, the joint part 5 is fixed with a fixing part F1 on one side of the left-right direction of the abdominal waist peripheral part 20. In the left-right direction, the fixing part F1 is provided closer than the joint part 2a. On the other side, the engaging portion 51 is provided on the other side than the fixed portion F1, and the maximum length W5b from the fixed portion F1 to the end on the base end side of the coupling portion 5 in the left-right direction is longer than that from the fixed portion F1. The maximum length W2a from the portion F1 to the joint portion 2a is preferably short (W5b<W2a). Compared with the case where the maximum length W5b in the left-right direction from the fixed part F1 to the end on the base end side of the joint part 5 is longer than the maximum length W2a in the left-right direction from the fixed part F1 to the joint part 2a, This can reduce the risk that the abdominal waist peripheral portion 20 will be torn from the base end side of the joint portion 5 against the intention of the wearer, or that the joint portion 5 and the abdominal waist peripheral portion 20 will be detached from each other.

Moreover, at least a part of the fixing part F1 is a cutting guide part, and the joint part 5 has a fixing means area J provided with a fixing means for forming the fixing part F1, and the length TJ of the fixing means area J in the up and down direction is , preferably longer than the vertical length Tf of the melted portion F1 (TJ>Tf). The vertical length TJ of the fixing means region J is made longer than the vertical length Tf of the melted portion F1, whereby the abdominal waist periphery is cut with the cutting guide portion (end CE of the melted portion F1) as a boundary. When removing the part 20, it is easy to cut from the upper end to the lower end of the abdominal waist peripheral part 20, and it is easy to separate completely.

The fixing part F1 of the diaper 1 of this embodiment is a welding part that welds the abdominal waist peripheral part 20 and the joining part 5. It is provided in the fixing means area J of the joining part 5 and is a melting part that melts the joining part 5. As shown in FIG. 17 , when viewed from the abdominal waist peripheral portion 20 side, the fixing means region J forms a fixing portion F1 in a portion overlapping the abdominal waist peripheral portion 20 , but is further apart than the abdominal waist peripheral portion 20 . The upper part J1 and the part J2 lower than the abdominal waist peripheral part are not fixed to the abdominal waist peripheral part 20, but only the part where the joint part 5 is melted. The fixed part F1 is continuous with the upper part J1, and the fixed part F1 is continuous with the lower part J2. Therefore, from the upper side toward the lower side, the portion J1, the melted portion F1 (fixed portion F1) functioning as a cutting guide portion, and the portion J2 are continuous, thereby making the cutting guide portion (end CE of the fixed portion F1) When cutting the abdominal waist peripheral portion 20 for the boundary, it is easy to cut from the upper end to the lower end of the abdominal waist peripheral portion 20 .

As shown in FIG. 22 , the abdominal waist peripheral portion 20 of the diaper 1 is provided with an elastic member 23 that expands and contracts in the left and right directions, and has an elastic region S that expands and contracts in the left and right directions, and a non-expandable region N that does not expand and contract in the left and right directions. The expansion and contraction area S of the abdominal waist peripheral portion 20 refers to the area in which the expansion and contraction member 23 can expand and contract. Specifically, in the left-right direction, the central portion and the area from the central portion to the side end on one side of the coupling portion 5 is the non-elastic area N. The stretchable region S has in the left-right direction: one side stretchable region Sa provided on one side, and the other side stretchable region Sb provided on the other side, and extends from the joint portion 2a on one side to the side end of the joint portion 5 on one side. The area from the joint part 2b on the other side to the central part is the one-side elastic area Sa, and the area from the joint part 2b on the other side to the center part is the other side elastic area Sb.

The coupling portion 5 is fixed to the abdominal waist peripheral portion 20 with the fixing portion F1. When the engaging portion 51 is detachably engaged with the non-skin side of the abdominal waist peripheral portion 20, the joint portion 2a is fixed to the joint portion 2a in the left-right direction. It is preferable to have one side of the elastic region Sa that expands and contracts in the left and right direction between the portions F1 and one side of the non-elastic region Na that does not expand and contract in the left and right direction between the joint portion 2a and the fixed portion F1. In FIGS. 17 and 22 , the non-elastic area Na on one side is represented by a halftone dot area. Then, one of the one-side stretchable area Sa (stretchable area) and the one-side non-stretchable area Na that the abdominal waist peripheral portion 20 has are provided so as to be adjacent to each other from the other side of the joint portion 2a in the left-right direction. It is preferable to provide the side stretchable area Sa and the one side non-stretchable area Na so as to be adjacent to the fixing part F1 from one side. Specifically, the one-side stretchable area Sa of the diaper 1 of this embodiment is adjacent to the joint portion 2a located on one side in the left-right direction from the other side in the left-right direction (the left side in FIG. 17 ). Furthermore, the one-side non-elastic region Na is adjacent to the fixing portion F1 located on the other side in the left-right direction than the joint portion 2a from one side in the left-right direction (the right side in FIG. 17 ).

Thereby, the non-elastic region Na on one side is adjacent to the melting portion F1, that is, the fixing portion F1, which is the cutting guide portion, from one side in the left-right direction, thereby making it easier to cut the abdominal waist peripheral portion 20 of the cutting guide portion. The waist-peripheral opening BH formed using the joining portion 5 can more easily be sized to closely fit the wearer's body by the stretchable area Sa on one side adjacent to the joining portion 2a from the other side in the left-right direction.

In addition, in the left-right direction, the fixing part F1 is provided on the other side of the joint part 2a, and the engaging part 51 is provided on the other side of the fixing part F1. It also has a non-fixed part D on one side and on the other side than the joint part 2a. As shown in FIG. 17 and others, when the diaper 1 is viewed from the abdominal waist peripheral portion 20 side in the front-rear direction, it is preferable to have a portion where the non-elastic region Na on one side overlaps the non-fixed portion D. The one-side expansion and contraction area Na prevents the force for moving the coupling part 5 from being stretched and contracted for buffering, and the force for moving the coupling part 5 can be easily directly applied to the coupling part 5 . On the other hand, when viewing the diaper 1 from the abdominal waist peripheral portion 20 side, the non-elastic area Na on one side overlaps the non-fixed portion D, so that the non-fixed portion D covers at least a part of the non-elastic area Na on one side, so it can be improved The rigidity of the portion between the joint portion 2a and the fixed portion F1 in the left-right direction can reduce the risk of damage to the portion between the joint portion 2a and the fixed portion F1.

In the diaper 1, the connecting part 5 is fixed to the abdominal waist peripheral part 20 with the fixing part F1, and the cutting guide part, which is the melting part F1, that is, the fixing part F1, welds the abdominal waist peripheral part 20 to the connecting part. In the welding part, the abdominal waist peripheral part 20 is provided with a stretchable region (one side stretchable region) S that stretches in the left and right directions, and the back waist peripheral part 30 is equipped with a stretchable region (the other side stretchable region) S30 that is stretchable in the left and right directions. (Figure 16, etc.). The expansion and contraction area S30 of the back waist peripheral portion 30 is an area in which the expansion and contraction member 33 can expand and contract in the left and right directions, and refers to the side end on the other side of the joint portion 2a in the left and right direction to the side end on one side of the joint portion 2b. area.

In the panty-type diaper 1, it is preferable that the stretch area S of the abdominal waist peripheral portion 20 and the stretch area S30 of the back waist peripheral portion 30 are connected through the joint portions 2a and 2b. That is, on one side of the left-right direction of the diaper 1, it is preferable that the elastic area Sa on one side of the abdominal waist peripheral part 20 and the elastic area S30 of the back waist peripheral part 30 are connected through the joint part 2a. On the other side in the left-right direction, the other side stretchable area Sb of the abdominal waist peripheral portion 20 is connected through the joint portion 2b. On the other hand, the coupling part 5 is provided with: one side non-elastic area (base end side non-elastic area) Na that does not extend or contract in the left-right direction on the base end side, and the other side that does not extend or contract in the left-right direction on the front end side. It is preferable that the non-elastic area (front end side non-elastic area) Nb is connected to the non-elastic area Na on one side and the non-elastic area Nb on the other side through the fixing part F1.

Thereby, the force applied to the joint parts 2a and 2b is buffered by the expansion and contraction of the elastic region Sa and the elastic region S30 on one side of the joint parts 2a and 2b and the elastic region Sb and the elastic region S30 on the other side adjacent to the joint parts 2a and 2b, thereby reducing the force exerted on the joint parts 2a and 2b. There is a risk that the joint parts 2a and 2b may be damaged by the force applied to the joint parts 2a and 2b. On the other hand, as for the coupling part 5, the force when moving the coupling part 5 can be directly applied to the coupling part 5 by the non-elastic areas Na and Nb adjacent to the fixed part F1, so it is easy to use the coupling part 5 The abdominal waist peripheral part 20 of the part 5 is cut.

Furthermore, in the natural state of the diaper 1, it is preferable that the coupling portion 5 provided at the abdominal waist peripheral portion 20 is folded back from the rear side in the front-rear direction to the front side on one side in the left-right direction. Furthermore, when the diaper 1 is viewed from the abdominal waist peripheral portion 20 side in the front-to-back direction, as shown in FIG. The frontmost side of 1 is better. Thereby, among the waist peripheral portions 20 and 30 of the diaper 1 in the natural state, at least part of the front side and the rear side located on one side in the left-right direction will be covered by the joint portion 5, so the waist peripheral portion covered by the joint portion 5 Parts 20 and 30 can reduce the risk of being torn against the wearer's intention.

===Other implementation forms=== The embodiments of the present invention have been described above. However, the above-described embodiments are intended to facilitate understanding of the present invention and are not intended to limit the interpretation of the present invention. In addition, the present invention can be changed or improved within the scope that does not deviate from the gist of the invention, and the present invention naturally includes such equivalents.

In the above-mentioned embodiment, the melting part F1 and the auxiliary melting part F2 are the fixing part F1 and the auxiliary fixing part F2 which fix the abdominal waist peripheral part 20 and the joint part 5 by welding, but they are not limited to this. The melted portion F1 may be a portion in which only the abdominal waist peripheral portion 20 is melted. Furthermore, similarly, the auxiliary melting portion F2 may be a portion that melts only the abdominal waist peripheral portion 20 .

In the above-mentioned embodiment, the joint part 5 and the abdominal waist peripheral part 20 of the diaper 1 are different members, and the joint part 5 and the abdominal waist peripheral part 20 are fixed by the fixing part F1, but it is not limited to this. The coupling part 5 only needs to be connected to the abdominal waist peripheral part 20. For example, it may be composed of the same member that connects the abdominal waist peripheral part 20 and the coupling part. It may also have a structure without a fixing part.

In the above-mentioned embodiment, although the coupling part 5 is connected (fixed) to the abdominal waist peripheral part 20, it is not limited to this. The coupling part 5 may be connected to the back waist peripheral part 30. In this case, similarly to the abdominal waist peripheral portion 20 , the connecting portion of the back waist peripheral portion 30 and the back waist peripheral portion 30 may be connected by being fixed with the fixing portion F1 , which is a different member. It is composed of continuous identical members, and a structure without the fixing part F1 may be used. Furthermore, the fixation (fixing portion F1 ) of the joint portion 5 and the waist peripheral portions 20 and 30 is not limited to joining by welding, and may be joined by a known method such as adhesive.

In the above embodiment, the connecting part 5 and the abdominal waist peripheral part 20 are fixed with the fixing part F1 so that the engaging part 51 is engaged with the non-skin side of the abdominal waist peripheral part 20, but the invention is not limited to this. The coupling part 5 and the abdominal waist peripheral part 20 may be fixed with the fixing part F1, and the engaging part 51 may be engaged with the non-skin side surface of the back waist peripheral part 30. Furthermore, the coupling part 5 and the dorsal waist peripheral part 30 may be fixed with the fixing part F1, and the engaging part 51 may be engaged with the non-skin side of the ventral waist peripheral part 20 or the non-skin side of the dorsal waist peripheral part 30 .

Moreover, in the above-mentioned embodiment, the diaper 1 is provided with the coupling part 5 fixed by the fixing part F1 which is the cutting guide part on one side in the left-right direction, and is joined by the coupling part 2b on the other side in the left-right direction. The waist peripheral parts 20 and 30 have a structure without the coupling part 5, but it is not limited to this. The diaper 1 is provided with a joining portion 5 fixed by a fixing portion F1 which is a cutting guide portion on one side in the left-right direction, and joins the waist peripheral portions 20 and 30 with a joining portion 2b on the other side in the left-right direction. The guide part, which is the melting part, may be cut, or the joint part may be fixed with the fixing part F1 provided as the melting part.

In the above-described embodiment, the melted portion F1 (fixed portion F1) is continuous from the upper end to the lower end of the abdominal waist peripheral portion 20, and the melted portion F1 (fixed portion F1) is entirely a cutting guide portion. However, the invention is not limited to this. . The melted portion F1 (fixed portion F1) may be discontinuous, the melted portion F1 (fixed portion F1) may not be provided to the upper end or lower end of the abdominal waist peripheral portion 20, and a part of the melted portion F1 (fixed portion F1) may be cut. You can also cut off the guide part. For example, the melted portion F1 (fixed portion F1) may be discontinuous, the linear melted portion F1 (fixed portion F1) may be branched in the middle, and a part of the melted portion F1 (fixed portion F1) may constitute a cutting guide portion. .

In the above embodiment, the cutting guide portion has an upper inclined portion fa1 that is inclined toward the upper side and the base end side from the cutting guide starting point K and an upper inclined portion fa1 that is inclined toward the lower side and the base end side from the cutting guide starting point K. The shape of the lower inclined portion fb1 is, however, not limited to this. The cutting guide portion may have a shape along the up-down direction, or may have a sloped portion such that the cutting guide starting point K is located at the upper end or lower end of the abdominal waist peripheral portion 20 . Furthermore, the cutting guide portion has an inclined portion that is inclined from the upper end of the abdominal waist peripheral portion 20 toward the lower side and the front end side, and an inclined portion that is inclined from the lower end of the abdominal waist peripheral portion 20 toward the upper side and the front end side. The shape of the part is also acceptable.

In the above embodiment, regarding the cutting guide portion (melting portion F1, fixing portion F1), the angle θ between the upper inclined portion fa1 and the lower inclined portion fb1 on the base end side of the coupling portion 5 is an obtuse angle, but this is not limited to this. Regarding the cutting guide portion (the melting portion F1 and the fixing portion F1), the angle θ between the upper inclined portion fa1 and the lower inclined portion fb1 on the base end side of the coupling portion 5 may be an acute angle. The melting part F1 is used as a cutting guide part to reduce the risk of unintentional tearing when a tear line is provided, and the angle θ is made an acute angle, so that it is easier to transmit to the up and down direction than when the angle θ is an obtuse angle. The upper slope portion fa1 and the lower slope portion fb1 having a high slope facilitate cutting of the cutting guide portion.

Moreover, as mentioned above, the diaper 1 can be held by grasping the abdominal waist peripheral part 20 with one hand and the connecting part 5 with the other hand, respectively, and pulling them outward in the left and right directions, whereby the abdominal waist peripheral part can be pulled apart. The part 20 is cut along the cutting guide part. In Figures 19A and 19B, the hand holding the abdominal waist peripheral part 20 and the other hand holding the connecting part 5 are pulled apart horizontally (parallel to the width direction of the diaper 1) to concentrate the force. The abdominal waist peripheral portion 20 is cut along the cutting guide portion (fixed portion F1) from the cutting guide starting point K located at the most front end side of the coupling portion 5, but this is not limited to This cut off. For example, the front end of the connecting portion 5 is pulled open with the front end of the connecting portion facing diagonally downward, or the front end of the connecting portion 5 is pulled open with the front end of the connecting portion facing diagonally upward, etc., and the abdominal waist can be performed by pulling the connecting portion 5 in any direction. The peripheral part 20 may also be cut.

FIG. 23 is a diagram illustrating a modified example of the cutting guide part. FIG. 23 is a diagram showing a modified example of the part The structure of the cutting guide part (fixing part F1) which is different from the above-mentioned diaper 1 is mainly demonstrated.

Also in the form shown in FIG. 23 , the fixing portion F1 that fixes the abdominal waist peripheral portion 20 and the coupling portion 5 functions as a cutting guide portion. As shown in FIG. 23 , the end CE on the other side (front end side) of the fixed portion F1 may have an uneven portion. The fixed portion F1 shown in FIG. 23 has a recessed portion fx that is recessed (recessed) toward one side (base end side) in the left-right direction at the other end CE, and is recessed (recessed) toward the other side (front end side) in the left-right direction. The convex portions fy protruding from the portion side) are provided alternately throughout the entire area of the fixed portion F1 in the up and down direction. The recessed portion fx and the convex portion fy (concave-convex portion) make it easy to set the cutting guide starting point K and to easily cut the abdominal waist peripheral portion 20 from the cutting guide starting point K with the cutting guide portion (fixed portion F1).

In the cutting guide part (fixed part F1) shown in FIG. 23, the boundary between the recessed part fx and the convex part fy (concave-convex part) is the cutting guide starting point K. Since the fixed portion F1 shown in FIG. 23 has a plurality of recessed portions fx and a plurality of convex portions fy, the cutting guide portion has a plurality of cutting guide starting points K. For example, the wearer grasps the abdominal waist peripheral portion 20 with one hand and the coupling portion 5 with the other hand, and moves in the direction of the arrow PLa in FIG. 23 (towards one side (the base end side) in the left-right direction). When the coupling part is pulled apart in the lower direction), the boundary between the recessed part fx and the convex part fy provided in the fixed part F1 of the coupling part 5 and located above the center in the up-down direction becomes a cutoff It guides the starting point K and makes it easy to cut with the cutting guide part. Then, the wearer, etc., grasps the abdominal waist peripheral portion 20 with one hand and the coupling portion 5 with the other hand, and moves in the direction of the arrow PLb in Fig. 23 (towards one side (the base end side) in the left-right direction). When the coupling part 5 is pulled apart (in the upper direction), the boundary between the recessed part fx and the convex part fy provided in the fixed part F1 of the coupling part 5 and located below the center in the up-down direction becomes a tangent. It is easy to cut by cutting the guide starting point K. The cutting guide portion (fixed portion F1) shown in Fig. 23 is provided with a plurality of recessed portions fx and convex portions fy alternately throughout the entire area of the fixed portion F1 in the up-down direction, and is provided with a plurality of cutting guide starting points K. , therefore, the direction of opening the joint part 5 is not limited to the directions PLa and PLb. The cutting guide starting point K corresponding to the direction in which the joint part 5 is opened by the wearer, etc. is used as the cutting starting point, so that the ventral side can be easily cut. Waist peripheral part 20.

The cutting guide part (fixed part F1) may have a structure as shown in FIGS. 24A and 24B. FIG. 24 is a diagram illustrating a modified example of the cutting guide part. In FIGS. 24A and 24B , only the shape of the fixing part F1 (cutting guide part) is shown. As shown in FIG. 24A , the cutting guide part (fixed part F1 ) may have a convex part fy protruding toward the other side (front end side) in the left-right direction, and may be located on one side in the left-right direction than the convex part fy The concave portion fx on the side (base end side). Moreover, similarly as shown in FIG. 24B , the cutting guide portion (fixed portion F1 ) may have a recessed portion fx that is recessed toward one side (the base end side) in the left-right direction, and a recessed portion fx that is recessed toward the other side in the left-right direction. (Top end side) protruding convex portion fy. In the fixed portion F1 shown in FIGS. 24A and 24B , a plurality of recessed portions fx and a plurality of convex portions fy are alternately provided in the entire area of the fixed portion F1 in the up and down direction. The cutting guide starting point K in FIG. 24A and FIG. 24B is the vertex on the front end side of each convex part fy.

The same applies to the cutting guide portion (fixing portion F1) shown in Figs. 24A and 24B. The wearer, etc., grasps the abdominal waist peripheral portion 20 with one hand and the connecting portion 5 with the other hand, and moves to Figs. 24A and 24B. When the coupling part is pulled apart in the direction of the arrow PLa in FIG. 24B (the direction toward one side (the base end side) and the lower side of the left-right direction), the fixing part F1 of the coupling part 5 is provided in the up and down direction. The portion above the center (upper inclined portion fa1) becomes the cutting guide starting point K. Furthermore, the wearer, etc., grasps the abdominal waist peripheral part 20 with one hand, grasps the coupling part 5 with the other hand, and moves in the direction of the arrow PLb in FIGS. 24A and 24B (towards one side (the base end) in the left-right direction). When the joint part is pulled apart (part side) and the upper direction), the part (lower inclined part fb1) provided in the fixed part F1 of the joint part 5 that is lower than the center in the up-down direction becomes a cut Guide starting point K. The fixed portion F1 shown in FIGS. 24A and 24B is also provided with a plurality of recessed portions fx and convex portions fy alternately throughout the entire area of the fixed portion F1 in the up and down direction, similarly to the fixed portion F1 shown in FIG. 23 . Furthermore, there are a plurality of cutting guide starting points K, so the direction of opening the joint part 5 is not limited to the directions PLa and PLb. The cutting guide starting point K corresponding to the direction in which the joint part 5 is opened by the wearer etc. is used as the cutting guide starting point K. By cutting the starting point, the abdominal waist peripheral portion 20 can be easily cut.

In the above embodiment, the diaper is exemplified as a diaper in which the abdominal waist peripheral portion 20 and the back waist peripheral portion 30 are separate and different components. However, a cross-down portion is provided between the abdominal waist peripheral portion 20 and the back waist peripheral portion 30 . , the abdominal waist peripheral portion 20 and the dorsal waist peripheral portion 30 may be formed into a continuous single member.

1: Diapers (disposable diapers, absorbent articles) 2a,2b:joint part 5:joint part 10:Absorbent body 11:Absorbent body 11A:Absorbent core 12:Surface thin slices 13:Second slice 14:Side slices 15:Back layer sheet 16:Exterior sheet 17: Telescopic components around the legs 18: Leak-proof wall telescopic components 20: Abdominal waist periphery (one side waist periphery) 21: Skin side sheet (waist surrounding sheet member) 22: Non-skin side sheet (waist periphery sheet member) 23:Telescopic components 25: Engaged part 30: Dorsal waist periphery (other side waist periphery) 31:Skin side slice 32: Non-skin side sheet 33:Telescopic components 51: Engagement part BH: Waist periphery opening (waist periphery opening) LH: Leg opening F1: Fixed part, melting part F2: Auxiliary fixation part, auxiliary melting part fa1: inclined part, upper inclined part fb1: inclined part, lower inclined part K: Cut off the starting point of guidance S: Telescopic area (Telescopic area on one side) S30: Telescopic area (telescopic area on the other side) Sa: One side telescopic area (telescopic area) Sb: other side telescopic area N: non-scalable area

[Fig. 1] A perspective view of the disposable diaper 1 in the wearing state according to the first embodiment. [Fig. 2] A plan view of the diaper 1 in a natural state as viewed from the abdominal waist peripheral portion 20 side. [Fig. 3] A top view of the diaper 1 in an unfolded and stretched state, viewed from the non-skin side side. [Fig. 4] An enlarged view of part X in Fig. 3. [Fig. 5] A diagram illustrating the separation of the abdominal waist peripheral portion 20 and the formation of the waist peripheral opening. [Fig. 6] A diagram illustrating the cutting operation of the abdominal waist peripheral portion 20. [Fig. 7] An enlarged view of the abdominal waist peripheral portion 20 in Fig. 3. [Fig. 8] An enlarged view of the fixing part F1 and the auxiliary fixing part F2. [Fig. 9] Fig. 9A is a diagram explaining the cutting guide part of the diaper 1. [Fig. FIG. 9B is a diagram explaining the cutting guide portion of the tear line. [Fig. 10] A diagram illustrating cutting of the cutting guide portion. [Fig. 11] A diagram illustrating a modification of the cutting guide portion. [Fig. 12] A diagram illustrating a modification of the cutting guide portion. [Fig. 13] A diagram illustrating a modification of the cutting guide portion. [Fig. 14] A perspective view of the disposable diaper 1 in a worn state according to the second embodiment. [Fig. 15] A plan view of the diaper 1 in its natural state as viewed from the abdominal waist peripheral portion 20 side. [Fig. 16] A top view of the diaper 1 in an unfolded and stretched state, viewed from the non-skin side side. [Fig. 17] An enlarged view of part X in Fig. 16. [Fig. 18] A diagram illustrating the separation of the abdominal waist peripheral portion 20 and the formation of the waist peripheral opening. [Fig. 19] A diagram illustrating the cutting operation of the abdominal waist peripheral portion 20. [Fig. 20] Fig. 20A is a diagram explaining the cutting guide part of the diaper 1. [Fig. Fig. 20B is a diagram explaining the cutting guide portion of the tear line. [Fig. 21] An enlarged view of the melting part F1 and the auxiliary melting part F2. [Fig. 22] An enlarged view of the abdominal waist peripheral portion 20 in Fig. 16. [Fig. 23] A diagram illustrating a modification of the cutting guide portion. [Fig. 24] A diagram illustrating a modified example of the cutting guide portion.

1: Diapers (disposable diapers, absorbent articles)

2a:joint part

5:joint part

10:Absorbent body

16:Exterior sheet

20: Abdominal waist periphery (one side waist periphery)

22: Non-skin side sheet (waist periphery sheet member)

25: Engaged part

30: Dorsal waist periphery (other side waist periphery)

BH: Waist periphery opening (waist periphery opening)

F1: Fixed part, melting part

F2: Auxiliary fixation part, auxiliary melting part

LH: Leg opening

Claims (35)

An absorbent article having up-down directions, left-right directions, and front-back directions that are orthogonal to each other, And it has a waist peripheral part including one side waist peripheral part and the other side waist peripheral part, and a span lower part, and is characterized by: The end portions of the waist peripheral portion on one side and the waist peripheral portion on the other side on at least one side in the left-right direction are joined by a joining portion, has a joint, The base end of the connecting portion is fixed to the waist peripheral portion with a fixing portion, The front end of the connecting portion has an engaging portion detachably engaged with the non-skin side of the waist peripheral portion, At least a part of the fixing part also serves as a cutting guide part when cutting at least a part of the waist peripheral part. The absorbent article as described in claim 1, wherein, When the absorbent article is viewed from the waist peripheral portion side of the one side in the front-rear direction, in the adjacent area adjacent to the fixing portion from the front end portion side of the coupling portion, The minimum weight per unit area of the aforementioned joint portion is greater than the maximum weight per unit area of the aforementioned waist peripheral portion. The absorbent article as described in claim 1 or 2, wherein, The aforementioned waist peripheral portion is formed by one or a plurality of waist peripheral sheet members, The aforementioned joint part is formed by one or a plurality of joint sheet members, When the absorbent article is viewed from the waist peripheral portion side of the one side in the front-rear direction, in the adjacent area adjacent to the fixing portion from the front end portion side of the coupling portion, The minimum weight per unit area of the one or plurality of joint sheet members is greater than the maximum weight per unit area of the one or plurality of waist peripheral sheet members. The absorbent article as described in any one of claims 1 to 3, wherein, Among the aforementioned cutting guide portions, the end of the coupling portion closest to the front end portion is the starting point of the cutting guide, The cutting guide portion has an inclined portion that is inclined in the up-down direction from an end closest to the front end portion toward the base end portion side. The absorbent article as described in any one of claims 1 to 4, wherein, Among the aforementioned cutting guide portions, the end of the coupling portion closest to the front end portion is the starting point of the cutting guide, The aforementioned cutting guide part has: an upper inclined portion that is inclined from the end closest to the front end portion toward the upper side and the base end portion side, A lower inclined portion is inclined from an end closest to the front end portion toward the lower side and the base end portion side. The absorbent article as described in claim 5, wherein, Among the angles between the upper inclined portion and the lower inclined portion, the angle in the left-right direction on the side of the base end portion is an obtuse angle. The absorbent article as described in claim 5, wherein, Among the angles between the upper inclined portion and the lower inclined portion, the angle in the left-right direction on the side of the base end portion is an acute angle. The absorbent article as described in any one of claims 4 to 7, wherein, Has an absorbent core that absorbs liquids, In the left-right direction, the cutting guide starting point is provided on one side of the absorptive core. The absorbent article as described in any one of claims 4 to 8, wherein, The cutting guide starting point overlaps the engaging portion in the up-down direction. The absorbent article as described in any one of claims 1 to 9, wherein, In the up-down direction, the cutting guide portion is continuous from the upper end to the lower end of the waist peripheral portion where the fixing portion is provided. The absorbent article as described in any one of claims 1 to 10, wherein, having an auxiliary fixing portion that assists in fixing the connecting portion and the waist peripheral portion provided with the fixing portion, The auxiliary fixing portion is disposed at intervals in the up-down direction on the proximal end side of the coupling portion relative to the cutting guide portion. The absorbent article as described in any one of claims 1 to 11, wherein, In the coupling portion, the maximum length in the left-right direction from the fixed portion to the end on the front end side is longer than the maximum length in the left-right direction from the fixed portion to the end on the base end side. long. The absorbent article as described in any one of claims 1 to 12, wherein, The cutting guide portion is a welding portion that welds the waist peripheral portion and the joining portion. The absorbent article as described in claim 13, wherein, In the aforementioned front-to-back direction, Among the waist peripheral portions, the melting point of the member closest to the joint portion in the front-rear direction is lower than the melting point of the member closest to the waist peripheral portion in the front-rear direction among the joint portions. The absorbent article as described in any one of claims 1 to 14, wherein, Has an absorbent core that absorbs liquids, The aforementioned coupling portion is fixed to the peripheral portion of the waist on one side by the aforementioned fixing portion, In the left-right direction, the cutting guide portion is provided between the joint portion and the absorbent core. The absorbent article as described in any one of claims 1 to 15, wherein, All of the fixing parts are the cutting guide parts. The absorbent article as described in any one of claims 1 to 16, wherein, In the waist peripheral portion provided with the fixing portion, a portion at a predetermined distance from the cutting guide portion toward the front end side of the coupling portion is a non-elastic region in which the waist peripheral portion does not expand or contract in the left-right direction. The absorbent article as described in any one of claims 1 to 16, wherein, An adhesive is applied to a portion of the waist peripheral portion provided with the fixing portion at a predetermined distance from the cutting guide portion toward the front end portion of the coupling portion. An absorbent article having up-down directions, left-right directions, and front-back directions that are orthogonal to each other, And it has a waist peripheral part including one side waist peripheral part and the other side waist peripheral part, and a span lower part, and is characterized by: Both ends of the waist peripheral portion on one side and the waist peripheral portion on the other side are respectively joined by joint portions, has a joint, The base end portion of the aforementioned coupling portion is connected to the aforementioned waist peripheral portion, The front end portion of the connecting portion has an engaging portion detachably engaged with the non-skin side of the waist peripheral portion on one side, The waist peripheral portion has a cutting guide portion for cutting at least a part of the waist peripheral portion, The cutting guide portion is provided at a position different from the joining portion provided at the both ends in the left-right direction, The cutting guide portion is a melting portion that melts at least a part of the waist peripheral portion. The absorbent article as described in claim 19, wherein, The aforementioned waist peripheral portion is equipped with a plurality of auxiliary melting portions. The waist peripheral portion cut using the cutting guide is configured such that the engaging portion is engaged with the non-skin side surface of the waist peripheral portion on one side, whereby a waist peripheral opening can be formed. The plurality of auxiliary melting parts are located closer to the base end of the coupling part than the cutting guide part in the direction along the waist peripheral opening, The plurality of auxiliary melting parts melt at least a part of the waist peripheral part and are arranged at intervals in the up-down direction. The absorbent article according to claim 20, wherein, At least a part of the plurality of auxiliary melting parts has a length in the left-right direction that is longer than a length in the up-down direction. The absorbent article as described in any one of claims 19 to 21, wherein, In the up-and-down direction, the cutting guide portion is continuous from the upper end to the lower end of the waist peripheral portion where the cutting guide portion is provided. The absorbent article as described in any one of claims 19 to 22, wherein, The cutting guide portion is inclined with respect to the up-down direction. The absorbent article as described in any one of claims 19 to 23, wherein, Among the aforementioned cutting guide portions, the end of the coupling portion closest to the front end portion is the starting point of the cutting guide, The aforementioned cutting guide part has: an upper inclined portion that is inclined from the end closest to the front end portion toward the upper side and the base end portion side, a lower inclined portion that is inclined from the end closest to the front end portion toward the lower side and the base end portion side, Among the angles between the upper inclined portion and the lower inclined portion, the angle in the left-right direction on the side of the base end portion is an obtuse angle. The absorbent article as described in any one of claims 19 to 23, wherein, Among the aforementioned cutting guide portions, the end of the coupling portion closest to the front end portion is the starting point of the cutting guide, The aforementioned cutting guide part has: an upper inclined portion that is inclined from the end closest to the front end portion toward the upper side and the base end portion side, a lower inclined portion that is inclined from the end closest to the front end portion toward the lower side and the base end portion side, Among the angles between the upper inclined portion and the lower inclined portion, the angle in the left-right direction on the side of the base end portion is an acute angle. The absorbent article as described in any one of claims 19 to 25, wherein, When the absorbent article is viewed from the side of the waist peripheral portion where the cutting guide portion is provided in the front-to-back direction, The cutting guide portion has a portion that overlaps the coupling portion. The absorbent article as described in any one of claims 19 to 26, wherein, The base end of the connecting portion is fixed to the waist peripheral portion with a fixing portion, At least a part of the aforementioned fixed portion is also the aforementioned cutting guide portion, In the coupling portion, the maximum length in the left-right direction from the fixed portion to the end on the front end side is longer than the maximum length in the left-right direction from the fixed portion to the end on the base end side. long. The absorbent article as described in claim 27, wherein, The aforementioned fixing portion is provided at the peripheral portion of the waist on one side, The fixing part is provided on the other side than the joint part in the left-right direction, The engaging portion is provided on the other side of the fixing portion in the left-right direction, In the left-right direction, the maximum length from the fixed part to the end of the joint part on the base end side is shorter than the maximum length from the fixed part to the joint part. The absorbent article as described in any one of claims 19 to 28, wherein, The aforementioned connecting portion is fixed to the aforementioned waist peripheral portion with a fixing portion, The aforementioned joining portion has a fixing means area provided with fixing means, and the fixing means is used to form the aforementioned fixing portion, At least a part of the aforementioned fixed portion is also the aforementioned cutting guide portion, The length of the fixing means region in the up-and-down direction is longer than the length of the melting portion in the up-and-down direction. The absorbent article as described in any one of claims 19 to 29, wherein, In a natural state, The coupling portion is folded back from the rear side in the front-rear direction to the front side in the front-rear direction on the one side in the left-right direction, When the absorbent article is viewed from the waist peripheral portion side of one side in the front-rear direction, the base end portion of the coupling portion is located at the rearmost side of the absorbent article, and the front end portion of the coupling portion is located at the rearmost side of the absorbent article. The frontmost side. The absorbent article as described in any one of claims 19 to 30, wherein, The aforementioned coupling portion is fixed to the peripheral portion of the waist on one side by a fixing portion, The aforementioned engaging portion is detachably engaged with the non-skin side of the waist peripheral portion on one side, The peripheral portion of the waist on one side is in the left-right direction, Between the joint portion and the fixing portion, there is an elastic region that expands and contracts in the left and right direction and a non-expandable region that does not expand and contract in the left and right direction, The aforementioned stretchable area is adjacent to the aforementioned joint portion from the other side, The non-elastic region is adjacent to the fixing portion from the one side. The absorbent article as described in claim 31, wherein, In the aforementioned left and right directions, The fixing part is provided on the other side than the joint part, The aforementioned engaging portion is provided on the other side of the aforementioned fixing portion, The coupling portion has a non-fixed portion that is not fixed to the waist peripheral portion of the one side provided on the one side of the fixed portion and on the other side of the joint portion, When the absorbent article is viewed from the waist peripheral portion side of the one side in the front-rear direction, the non-elastic region has a portion overlapping the non-fixed portion. The absorbent article as described in any one of claims 19 to 32, wherein, The aforementioned connecting portion is fixed to the aforementioned waist peripheral portion with a fixing portion, The fixing part is a welding part that welds the waist peripheral part and the joining part, At least a part of the aforementioned fixed portion is also the aforementioned cutting guide portion, The one-side waist peripheral portion is provided with one-side stretchable region that stretches in the left-right direction, The other side waist peripheral portion is provided with the other side stretchable area that expands and contracts in the left-right direction, The one side elastic region and the other side elastic region are connected through the aforementioned joint portion, The coupling portion includes: a base end side non-elastic region that does not expand or contract in the left-right direction on the base end side; and a distal end side non-elastic region that does not expand or contract in the left-right direction on the front end side, The non-elastic region on the base end side and the non-elastic region on the front end side are connected through the fixing part. The absorbent article as described in any one of claims 19 to 33, wherein, The arrangement patterns of the melting portion and the bonding portion are different. The absorbent article as described in any one of claims 1 to 34, wherein, The connecting portion has an uneven portion at an end portion on the front end portion side.

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