absorbent materials

Abstract

An absorbent article (1) having mutually orthogonal vertical, horizontal, and front-back directions, and having a waist periphery (20) and a crotch periphery (30) on one side of the waist periphery (20) and the other side of the waist periphery (30), characterized in that the ends of the waist periphery (20) and the other side of the waist periphery (30) on at least one side in the horizontal direction are joined by a joint (2a, 2b) and have a joint (5). The base end of the joint (5) is fixed to the waist periphery (20, 30) by a fixing part (F1). The front end of the joint (5) has a locking part (51) that can be separably engaged with the non-skin side of the waist periphery (20, 30). At least a part of the fixing part (F1) is also a cutting guide when cutting at least a part of the waist periphery.

Description

Technical Field

[0001] This invention relates to absorbent articles. Prior Technology

[0002] Previously, disposable diapers, such as those in Patent Document 1, were known to be designed by cutting off a predetermined part of a so-called panty-type diaper that was pre-connected into a ring around the waist, thereby allowing it to be used as an open-type adhesive diaper. [Previous Technical Documents] [Patent Literature]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 5-317356 Summary of the Invention

[0004] [The problem the invention aims to solve]

[0005] The problem that this invention seeks to solve is at least one of the following first or second problems. In the first issue, the disposable diaper of Patent Document 1 has the following features: a bonding piece that can be attached to the front side, a joint that connects the front and back sides into one piece, and a tear line-like cutting line near the joint. However, it is desirable to form a disposable diaper that can be cut off from the front (back) side with a simpler engineering process.

[0006] The present invention was made in view of the aforementioned problems, and its purpose is to provide an absorbent article that eliminates the need for separate fixing parts and cutting guide parts for securing the joint.

[0007] In the second issue, although the disposable diaper of Patent Document 1 has: a bonding piece that can be attached to the front side, a joint that connects the front side and the back side into one piece, and a tear line-like cutting line near the joint, there is a risk that the front side may be accidentally cut off from the back side by the cutting line formed by the tear line during the manufacturing stage, distribution stage, pre-wearing stage, or when worn as an underwear-type diaper.

[0008] The present invention was made in view of the aforementioned problems, and its purpose is to provide an absorbent article that reduces the risk of being torn against the wearer's or other intentions. [Technical means to solve the problem]

[0009] The main invention for achieving the first objective mentioned above is an absorbent article having mutually orthogonal vertical, horizontal, and front-back directions, and having a waist periphery with one side waist periphery and another side waist periphery, and a crotch portion. The article is characterized in that the ends of the aforementioned one side waist periphery and the aforementioned other side waist periphery in at least one side of the aforementioned horizontal direction are joined by a joint portion, having a joint portion. The base end of the aforementioned joint portion is fixed to the aforementioned waist periphery by a fixing portion. The front end of the aforementioned joint portion has a locking portion that can be detachably engaged with the non-skin side of the aforementioned waist periphery. At least a portion of the aforementioned fixing portion is also a cutting guide portion when cutting off at least a portion of the aforementioned waist periphery.

[0010] The main invention for achieving the second objective mentioned above is an absorbent article having mutually orthogonal vertical, horizontal, and front-back directions, and having a waist periphery with a side waist periphery and a side waist periphery, and a crotch portion. The article is characterized in that the two ends of the aforementioned side waist periphery and the aforementioned side waist periphery are joined by a joint, having a joint portion. The base end of the aforementioned joint portion is connected to the aforementioned waist periphery. The front end of the aforementioned joint portion has a locking portion that can be detachably engaged with the non-skin side of the aforementioned side waist periphery. The aforementioned waist periphery has a cutting guide portion for cutting off at least a portion of the aforementioned waist periphery. The cutting guide portion is located at a different position than the aforementioned joint portion located at the aforementioned two ends in the horizontal direction. The cutting guide portion is a melting portion that melts at least a portion of the aforementioned waist periphery.

[0011] Other features of the present invention are disclosed in this specification and the accompanying drawings. [Effects of the Invention]

[0012] The present invention provides an absorbent article that eliminates the need for separate fixing and cutting guide portions, thus addressing the first objective.

[0013] Regarding the effect of the second issue, the present invention provides an absorbent article that reduces the risk of being torn against the wearer's or other intentions. Simple Explanation of the Diagram

[0014] [Figure 1] A perspective view of the disposable diaper 1 in its wearing state in the first embodiment. [Figure 2] Top view of the diaper 1 in its natural state, viewed from the ventral waist perimeter 20 side. [Figure 3] Top view of the diaper 1 in its unfolded and stretched state, viewed from the non-skin side. [Figure 4] An enlarged view of part X in Figure 3. [Figure 5] This figure illustrates the separation of the periphery of the ventral waist 20 and the formation of the periphery opening. [Figure 6] A diagram illustrating the cutting action of the periphery of the ventral waist 20. [Figure 7] An enlarged view of the periphery of the ventral waist in Figure 3. [Figure 8] Enlarged view of fixing part F1 and auxiliary fixing part F2. [Figure 9] Figure 9A is a diagram illustrating the cutting guide portion of the diaper 1. Figure 9B is a diagram illustrating the cutting guide portion of the tear line. [Figure 10] A diagram illustrating the cutting of the cutting guide section. [Fig. 11] A diagram illustrating a modified example of the cut-off guide portion. [Fig. 12] A figure illustrating a modified example of the cut-off guide section. [Fig. 13] A figure illustrating a modified example of the cut-off guide section. [Fig. 14] A perspective view of the disposable diaper 1 in the wearing state of the second embodiment. [Fig. 15] Top view of the diaper 1 in its natural state, viewed from the ventral waist perimeter 20 side. [Fig. 16] Top view of the unfolded and stretched diaper 1 viewed from the non-skin side. [Figure 17] An enlarged view of part X in Figure 16. [Fig. 18] This figure illustrates the separation of the periphery of the ventral waist 20 and the formation of the periphery opening. [Fig. 19] This diagram illustrates the cutting action of the periphery of the ventral waist 20. [Figure 20] Figure 20A is a diagram illustrating the cutting guide portion of the diaper 1. Figure 20B is a diagram illustrating the cutting guide portion of the tear line. [Figure 21] Enlarged view of the melting part F1 and the auxiliary melting part F2. [Figure 22] An enlarged view of the periphery of the ventral waist in Figure 16. [Figure 23] A figure illustrating a modified example of the cut-off guide section. [Fig. 24] A figure illustrating a modified example of the cut-off guide section. Implementation

[0015] From the description in this specification and the accompanying drawings, at least the following information can be obtained. An absorbent article having mutually orthogonal vertical, horizontal, and front-back directions, and having a waist periphery with one side waist periphery and another side waist periphery, and a crotch portion, characterized in that the ends of the aforementioned one side waist periphery and the aforementioned other side waist periphery in at least one side in the aforementioned horizontal direction are joined by a joint portion, having a joint portion, the base end of the aforementioned joint portion being fixed to the aforementioned waist periphery by a fixing portion, the front end of the aforementioned joint portion having a locking portion that can be detachably engaged with the non-skin side of the aforementioned waist periphery, and at least a portion of the aforementioned fixing portion also being a cutting guide portion when cutting off at least a portion of the aforementioned waist periphery.

[0016] Based on this absorbent article, it is not necessary to separately set up a fixing part and a cutting guide part, so an absorbent article with simplified manufacturing process can be provided.

[0017] In this absorbent article, when viewed from the periphery of the waist portion in the aforementioned front-rear direction, it is preferable that the lowest weight per unit area of ​​the aforementioned joint portion is greater than the highest weight per unit area of ​​the aforementioned periphery of the waist portion in the adjacent area adjacent to the aforementioned fixing portion from the aforementioned front end portion side of the aforementioned joint portion.

[0018] According to this absorbent article, the waist periphery is easier to separate than the joint when the guide portion is cut off, and it is easy to form an absorbent article that can lock the joint in the separated waist periphery to form an opening around the waist.

[0019] In this absorbent article, the aforementioned waist periphery is formed by one or more waist periphery sheet members, and the aforementioned joint is formed by one or more joint sheet members. When viewing the absorbent article from the waist periphery side in the aforementioned front-rear direction, in the adjacent area of ​​the aforementioned joint from the aforementioned front end side adjacent to the aforementioned fixing part, it is preferable that the minimum weight per unit area of ​​the aforementioned one or more joint sheet members is greater than the maximum weight per unit area of ​​the aforementioned one or more waist periphery sheet members.

[0020] According to this absorbent article, in the case where the minimum weight per unit area of ​​the connecting sheet member is smaller than the maximum weight per unit area of ​​the waist perimeter sheet member in the fixing part, the waist perimeter sheet member is easier to be cut by the cutting guide than the connecting sheet member, and thus it is easy to become an absorbent article in which the connecting part is engaged in the waist perimeter part separated by cutting to form an opening in the waist perimeter.

[0021] In the absorbent article, the end of the aforementioned connecting portion closest to the aforementioned front end is the starting point for cutting guidance. The aforementioned cutting guide preferably has an inclined portion that slopes from the end closest to the aforementioned front end toward the aforementioned base end and is inclined in the aforementioned vertical direction.

[0022] According to this absorbent article, when a cutting force is applied to the cutting guide, it is easy to concentrate the force at the starting point of the cutting guide and transmit the applied force from the starting point of the cutting guide to the inclined part, thereby making it easy to cut the waist perimeter along the shape of the cutting guide.

[0023] In the absorbent article, the end of the aforementioned connecting portion closest to the aforementioned front end is the starting point for cutting. Preferably, the aforementioned cutting guide portion has an upper inclined portion that slopes upward from the end closest to the aforementioned front end and towards the aforementioned base end, and a lower inclined portion that slopes downward from the end closest to the aforementioned front end and towards the aforementioned base end.

[0024] According to this absorbent article, when a cutting force is applied to the cutting guide, 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 upper inclined part and the lower inclined part, thus making it easy to cut.

[0025] In this absorbent article, among the angles formed by the aforementioned upper inclined portion and the aforementioned lower inclined portion, the angle of the aforementioned base end side in the left-right direction is preferably an obtuse angle.

[0026] According to this absorbent article, it can be easily cut by a cutting guide that is inclined from the starting point of the cutting guide, and the length of the cutting guide in the left and right direction can be shortened compared to the case where the angle between the upper and lower inclined parts on the base end side is an acute angle.

[0027] In this absorbent article, among the angles formed by the aforementioned upper inclined portion and the aforementioned lower inclined portion, the angle of the aforementioned base end side in the left-right direction is preferably an acute angle.

[0028] According to this absorbent article, compared to the case where the angle between the upper and lower inclined portions on the base end side is an obtuse angle, when a cutting force is applied to the cutting guide portion, it is easier to transmit the force concentrated at the starting point of the cutting guide portion to the upper and lower inclined portions, thus making it easier to cut the cutting guide portion.

[0029] In this absorbent article, which has an absorbent core for absorbing liquid, the cutting guide starting point is preferably located on the side further away from the absorbent core in the aforementioned left-right direction.

[0030] Based on this type of absorbent material, the absorbent core is a part that is not easy to tear due to its high rigidity. Therefore, the waist perimeter is cut off on the side that is closer to the absorbent core in the left and right directions, thereby making it easier to cut off the waist perimeter.

[0031] In this absorbent material, it is preferable that the aforementioned cutting guide starting point overlaps with the aforementioned engaging portion in the aforementioned vertical direction.

[0032] According to this absorbent material, when cutting with the cutting guide, it is mostly grasped by the engaging part of the joint, so the force applied to the joint is easily transmitted to the starting point of the cutting guide, and it is easy to cut with the cutting guide.

[0033] In the absorbent article, in the aforementioned vertical direction, the aforementioned cutting guide portion preferably extends from the upper end to the lower end of the aforementioned waist periphery portion where the aforementioned fixing portion is provided.

[0034] Based on this absorbent material, it is easy to cut along the cutting guide to cut the waist perimeter.

[0035] The absorbent article has an auxiliary fixing part that assists in fixing the aforementioned connecting part to the aforementioned waist periphery where the aforementioned fixing part is provided. Preferably, the auxiliary fixing part is arranged at intervals in the aforementioned vertical direction on the aforementioned base end side of the aforementioned connecting part, which is closer to the aforementioned cutting guide part.

[0036] Based on this absorbent material, the auxiliary fixing part will strengthen the fixation of the joint to the waist periphery, and by arranging the auxiliary fixing parts at intervals, the risk of cutting off the waist periphery starting from the auxiliary fixing part can be reduced.

[0037] In this absorbent article, the maximum length in the left-right direction from the aforementioned fixing part to the aforementioned front end side end is preferably longer than the maximum length in the left-right direction from the aforementioned fixing part to the aforementioned base end side end.

[0038] According to this absorbent article, when the maximum length in the left and right direction from the fixed part to the front end is shorter than the maximum length in the left and right direction from the fixed part to the base end, it is easier to grasp the front end of the joint, thus making it easier to perform joint operations such as cutting the waist perimeter or engaging the engaging part.

[0039] In this absorbent article, the aforementioned cutting guide portion is preferably a welded portion that welds the aforementioned waist periphery portion to the aforementioned joint portion.

[0040] According to this absorbent material, since the cut guide is a welded part, the risk of accidentally tearing the waist area unintentionally due to the cut guide is reduced.

[0041] In the absorbent article, the melting point of the component closest to the joint in the aforementioned front-back direction and the aforementioned waist periphery is preferably lower than the melting point of the component closest to the aforementioned waist periphery in the aforementioned front-back direction of the aforementioned joint.

[0042] Based on this absorbent material, in the case of welding, the material with a lower melting point will melt more easily, thus making the waist periphery with a lower melting point easier to melt. This makes it easier to melt the component on the joint side of the waist periphery of the cutting guide, and the waist periphery can be easily cut off.

[0043] The absorbent article has an absorbent core that absorbs liquid. The aforementioned joint is fixed to the periphery of the aforementioned side waist by the aforementioned fixing part. In the aforementioned left-right direction, the aforementioned cutting guide is preferably provided between the aforementioned joint and the aforementioned absorbent core.

[0044] Based on this type of absorbent material, the absorbent core is a part that is not easy to tear due to its high rigidity. Therefore, the waist perimeter is cut off on the side that is closer to the absorbent core in the left and right directions, thereby making it easier to cut off the waist perimeter.

[0045] In this absorbent article, it is preferable that all of the aforementioned fixing parts are the aforementioned cutting guide parts.

[0046] Based on this absorbent material, it is easy to cut along the waist perimeter of the fixed part.

[0047] In this absorbent article, the portion of the waist periphery where the aforementioned fixing portion is provided, at a predetermined distance from the aforementioned cutting guide portion toward the aforementioned connecting portion, is preferably a non-stretchable area where the aforementioned waist periphery will not stretch or extend in the aforementioned left-right direction.

[0048] This absorbent material prevents the waist area from elongating due to the force applied when cutting the waist area, thus making it easier to apply the force used to cut the waist area to the cutting guide.

[0049] The absorbent article is preferably coated with adhesive in the portion of the waist periphery where the aforementioned fixing portion is provided, at a predetermined distance from the aforementioned cutting guide portion toward the aforementioned joint portion at the aforementioned front end.

[0050] According to this absorbent material, the rigidity of the waist perimeter is increased compared to the case without adhesive coating, thus making it easier to apply the force used to cut the waist perimeter to the cutting guide.

[0051] According to this specification and accompanying drawings, an absorbent article has mutually orthogonal vertical, horizontal, and front-back directions, and has a waist periphery portion having a side waist periphery portion and a side waist periphery portion, and a crotch portion. The article is characterized in that the two ends of the aforementioned side waist periphery portion and the aforementioned side waist periphery portion are respectively joined by a joint portion, having a joint portion. The base end of the aforementioned joint portion is connected to the aforementioned waist periphery portion. The front end of the aforementioned joint portion has a locking portion that can be detachably engaged with the non-skin side of the aforementioned side waist periphery portion. The aforementioned waist periphery portion has a cutting guide portion when at least a portion of the aforementioned waist periphery portion is cut off. The cutting guide portion is located at a different position than the aforementioned joint portion located at the aforementioned two ends in the horizontal direction. The cutting guide portion is a melting portion that melts at least a portion of the aforementioned waist periphery portion.

[0052] According to this absorbent material, since the melting part is the cutting guide, the risk of tearing due to unintended consequences can be reduced.

[0053] The absorbent article, wherein the aforementioned waist periphery has a plurality of auxiliary melting portions, and the aforementioned waist periphery after being cut by the aforementioned cutting guide portion is configured to engage the aforementioned engaging portion with the non-skin side of the aforementioned one-sided waist periphery, thereby forming a waist periphery opening, the aforementioned plurality of auxiliary melting portions being located at a position closer to the base end of the aforementioned engaging portion than the aforementioned cutting guide portion along the direction of the aforementioned waist periphery opening, the aforementioned plurality of auxiliary melting portions melting at least a portion of the aforementioned waist periphery, and preferably being spaced apart in the aforementioned vertical direction.

[0054] Based on this absorbent material, the cutting guide can be used to guide the cutting of the waist periphery, and the auxiliary melting part can be used to reduce the risk of the waist periphery being cut in an unwanted location.

[0055] In the absorbent article, it is preferable that at least a portion of the aforementioned plurality of auxiliary melting parts has a length in the left-right direction that is longer than its length in the up-down direction.

[0056] Based on this absorbent material, the risk of breakage can be easily reduced by the auxiliary melting part when force is applied to the waist area from the left and right directions.

[0057] In the absorbent article, in the aforementioned vertical direction, the aforementioned cutting guide portion preferably extends from the upper end to the lower end of the aforementioned waist periphery portion where the aforementioned cutting guide portion is provided.

[0058] Based on this absorbent material, the cutting guide of the melting part reduces the risk of tearing against the intended purpose, and when cutting the waist perimeter, it is easy to completely cut off from the upper end to the lower end of the waist perimeter.

[0059] In this absorbent article, the aforementioned cutting guide is preferably tilted in the aforementioned vertical direction.

[0060] Based on this absorbent material, compared to the case where the cut guide is parallel to the vertical direction, the risk of tearing due to unintended consequences can be reduced by cutting the guide.

[0061] In the absorbent article, the end of the aforementioned connecting portion closest to the aforementioned front end is the cutting guide starting point. The aforementioned cutting guide has an upper inclined portion that slopes upward from the end closest to the aforementioned front end and towards the aforementioned base end, and a lower inclined portion that slopes downward from the end closest to the aforementioned front end and towards the aforementioned base end. The angle between the aforementioned upper inclined portion and the aforementioned lower inclined portion is preferably an obtuse angle in the left-right direction towards the aforementioned base end.

[0062] According to this absorbent article, compared to the case where the angle between the upper and lower inclined portions on the base end side is an acute angle, it is easier to reduce the risk of breakage from the cutting guide point along the waist periphery of the cutting guide portion in violation of the intention.

[0063] In the absorbent article, the end of the aforementioned connecting portion closest to the aforementioned front end is the cutting guide starting point. The aforementioned cutting guide has an upper inclined portion that slopes upward from the end closest to the aforementioned front end and towards the aforementioned base end, and a lower inclined portion that slopes downward from the end closest to the aforementioned front end and towards the aforementioned base end. The angle between the aforementioned upper inclined portion and the aforementioned lower inclined portion is preferably an acute angle in the left-right direction towards the aforementioned base end.

[0064] According to this absorbent article, the cutting guide is a melting part, which can reduce the risk of tearing unintended, such as a tear line. Moreover, compared to the case where the angle between the upper and lower inclined parts on the base end side is an obtuse angle, it is easier to cut the waist perimeter with the cutting guide.

[0065] In the absorbent article, when viewed from the periphery of the waist portion where the aforementioned cutting guide is provided in the aforementioned front-back direction, it is preferable that the aforementioned cutting guide has a portion that overlaps with the aforementioned joint portion.

[0066] According to this absorbent material, since the joint can easily cover at least a portion of the cut guide, the risk of tearing unintended around the waist can be reduced.

[0067] In this absorbent article, the base end of the aforementioned joint is fixed to the periphery of the aforementioned waist by a fixing part, at least a portion of the aforementioned fixing part is also the aforementioned cutting guide part, and the maximum length in the left-right direction from the aforementioned fixing part to the aforementioned front end end is preferably longer than the maximum length in the left-right direction from the aforementioned fixing part to the aforementioned base end end.

[0068] According to this absorbent article, the cutting guide is a fixing part that fixes the joint to the waist perimeter, thereby reducing the situation of cutting the waist perimeter in an unintended state, and when cutting the waist perimeter along the cutting guide, it is easy to grasp the front end of the joint to apply force, and thus easily cut the waist perimeter.

[0069] In this absorbent article, the aforementioned fixing part is provided on the periphery of the waist portion on one side, the aforementioned fixing part is provided on the other side in the left-right direction, which is closer to the other side than the aforementioned joint portion, the aforementioned engaging part is provided on the other side in the left-right direction, which is closer to the aforementioned fixing part, and the maximum length from the aforementioned fixing part to the end of the aforementioned joint portion on the aforementioned base end side in the left-right direction is preferably shorter than the maximum length from the aforementioned fixing part to the aforementioned joint portion.

[0070] According to this absorbent article, when the maximum length from the fixed part to the base end of the joint in the left-right direction is longer than the maximum length from the fixed part to the joint, the risk of the joint accidentally tearing from the base end side can be reduced.

[0071] In this absorbent article, the aforementioned joint portion is fixed to the aforementioned waist periphery portion by a fixing portion, the aforementioned joint portion has a fixing means area with a fixing means for forming the aforementioned fixing portion, at least a part of the aforementioned fixing portion is also the aforementioned cutting guide portion, and the aforementioned fixing means area is preferably longer in the aforementioned vertical direction than the aforementioned vertical direction length of the aforementioned melting portion.

[0072] Based on this absorbent material, in the vertical direction, the length of the fixing means area is longer than the length of the melting part of the waist periphery, thereby making it easy to separate the waist periphery by using the cut guide part as the boundary.

[0073] In the absorbent article, in its natural state, the aforementioned joint portion folds back from the rear side in the aforementioned front-rear direction to the front side in the aforementioned front-rear direction on the aforementioned side of the left-right direction. When the absorbent article is viewed from the waist periphery side of the aforementioned side in the aforementioned front-rear direction, the aforementioned base end of the aforementioned joint portion is located at the rearmost side of the aforementioned absorbent article, and the aforementioned front end of the aforementioned joint portion is located at the frontmost side of the aforementioned absorbent article.

[0074] According to this absorbent material, in its natural state, at least a portion of the waist periphery located on the front and back sides of one of the left and right directions can be covered by a joint, thus reducing the risk of the waist periphery being accidentally torn.

[0075] In this absorbent article, the aforementioned connecting portion is fixed to the periphery of the aforementioned one side waist by a fixing portion, the aforementioned engaging portion is detachably engaged to the non-skin side of the periphery of the aforementioned one side waist, and the periphery of the aforementioned one side waist has a telescopic region that extends and retracts in the aforementioned left and right directions and a non-telescopic region that does not extend and retract in the aforementioned left and right directions between the aforementioned connecting portion and the aforementioned fixing portion in the aforementioned left and right directions. Preferably, the aforementioned telescopic region is adjacent to the aforementioned connecting portion from the other side, and the aforementioned non-telescopic region is adjacent to the aforementioned fixing portion from the aforementioned one side.

[0076] According to this absorbent material, cutting the guide section is easier due to the non-stretchable area, and the waist opening formed by the joint is easier to fit the wearer's body due to the stretchable area.

[0077] In this absorbent article, in the aforementioned left-right direction, the aforementioned fixing portion is provided on the side further away from the aforementioned joint portion, the aforementioned engaging portion is provided on the side further away from the aforementioned fixing portion, and the aforementioned joint portion has a non-fixed portion that is not fixed to the aforementioned side waist periphery portion provided on the side further away from the aforementioned fixing portion and the side further away from the aforementioned joint portion. When viewing the aforementioned absorbent article from the side waist periphery portion side in the aforementioned front-back direction, it is preferable that the aforementioned non-stretchable area overlaps with the aforementioned non-fixed portion.

[0078] According to this absorbent material, the force acting on the joint is directly applied to the joint through the non-stretchable area, and the non-fixed part covers the non-stretchable area, thereby increasing the rigidity of the part between the joint and the fixed part and easily reducing the risk of damage to the part between the joint and the fixed part.

[0079] In this absorbent article, the aforementioned connecting portion is fixed to the aforementioned waist periphery by a fixing portion, the aforementioned fixing portion being a welding portion that welds the aforementioned waist periphery to the aforementioned connecting portion, at least a portion of the aforementioned fixing portion also being the aforementioned cutting guide portion, the aforementioned one-sided waist periphery having a one-sided telescopic region that telescopics in the aforementioned left and right direction, the aforementioned other-sided waist periphery having another-sided telescopic region that telescopics in the aforementioned left and right direction, the aforementioned one-sided telescopic region and the aforementioned other-sided telescopic region being connected through the aforementioned connecting portion, the aforementioned connecting portion having: a base end side non-telescopic region that does not telescopic in the aforementioned left and right direction on the aforementioned base end side, and a front end side non-telescopic region that does not telescopic in the aforementioned left and right direction on the aforementioned front end side, preferably the aforementioned base end side non-telescopic region and the aforementioned front end side non-telescopic region being connected through the aforementioned fixing portion.

[0080] According to this absorbent article, by means of the expansion and contraction of the expansion and contraction area adjacent to the joint, the force is prevented from being concentrated at the joint and causing the joint to break. By means of the non-expansion and contraction area of ​​the fixed part adjacent to the joint, the force applied to the joint can be applied directly, so it is easy to cut off the waist perimeter caused by the force applied to the joint.

[0081] In this absorbent article, it is preferable that the aforementioned melting portion and the aforementioned joint portion are configured differently.

[0082] Depending on the purpose of this absorbent material, it can be configured in an appropriate way to match the melting part and the joint part.

[0083] In this absorbent article, the end of the aforementioned joint on the front end side preferably has a concave-convex portion.

[0084] Based on this absorbent article, it is easy to set a cutting guide point by means of the concave and convex portions at the front end of the joint, and it is easy to cut the waist perimeter by means of the cutting guide point.

[0085] ===First Implementation Form=== The following description uses a disposable diaper in the form of underwear for infants as an example of the absorbent article of the present invention. However, the absorbent article of the present invention is not limited to disposable diapers for infants, but can also be used in disposable diapers for adults, menstrual underwear, etc.

[0086] ===Construction of Disposable Diaper 1=== Figure 1 is a perspective view of the disposable diaper 1 (hereinafter referred to as "diaper") in its first embodiment, viewed from one side in the left-right direction. Figure 2 is a top view of the diaper 1 in its natural state, viewed from the side of the waist perimeter 20 on the abdominal side. Figure 3 is a top view of the diaper 1 in its unfolded and extended state, viewed from the non-skin side. The center line CC in Figure 3, etc., is the center line in the left-right direction in the extended state. Also, Figure 3 shows the unfolded and extended state of the panty-type diaper 1 shown in Figures 1 and 2. Hereinafter, the center line CC in the left-right direction of the diaper 1 in each figure is the center line in the extended state.

[0087] "Natural state" refers to the state of the diaper 1 after a predetermined time. For example, the diaper 1 in its product state is removed from the packaging, and the waist area 30 on the back is pulled outwards to the left and right, so that the waist area 20 and 30 are in an "extended state." This extended state is maintained for 15 seconds, after which the stretching of the diaper 1 is released and it is placed on a flat surface such as a table. Then, the state after being placed on such a flat surface for 5 minutes is defined as the natural state.

[0088] "Unfolded state" refers to the state in which the two sides of the diaper 1 in its panty-like state, namely the two side ends of the abdominal waist perimeter 20 and the two side ends of the back waist perimeter 30, are separated and unfolded to form a flat surface. "Stretched state" refers to the state in which the elastic members of the diaper 1 are stretched to the point where wrinkles of the diaper 1 are no longer visible. Specifically, it means that the dimensions of each component constituting the diaper 1 (such as the abdominal waist perimeter 20, described later) are stretched to a size that is the same as or close to the size of the individual component.

[0089] The diaper 1, in the panty-like state shown in Figures 1 and 2, has an opening around the waist (BH) and a pair of openings around the legs (LH) in the vertical, horizontal, and front-back directions. In the vertical direction, the side with the waist opening (BH) is the upper side, and the side below the crotch is the lower side. In the front-back direction, the side facing the wearer's abdomen is the front side, and the side facing the wearer's back is the back side. Furthermore, the direction in which the materials constituting the diaper 1 are layered is called the thickness direction; the side in the thickness direction that contacts the wearer is called the skin side, and the side opposite to the skin side is called the non-skin side. Also, the thickness direction is the same as the front-back direction in its natural state.

[0090] The diaper 1 on the underwear side is a so-called three-piece design, having an absorbent body 10, a ventral waist perimeter 20, and a dorsal waist perimeter 30. The ventral waist perimeter 20 covers the wearer's ventral side, and the dorsal waist perimeter 30 covers the wearer's dorsal side. The diaper 1 also has a connecting part 5.

[0091] In the unfolded state of the diaper 1 shown in Figure 3, the abdominal waist perimeter 20 and the back waist perimeter 30 are arranged such that their long sides run along the left-right direction of the diaper 1. Then, at the center of the abdominal waist perimeter 20 in the left-right direction, one end of the absorbent body 10 in the long side direction is disposed, and at the center of the back waist perimeter 30 in the left-right direction, the other end of the absorbent body 10 in the long side direction is disposed, thereby forming the crotch portion 40. The absorbent body 10 is positioned closer to the skin than the abdominal waist perimeter 20 and the back waist perimeter 30.

[0092] The diaper 1 in its unfolded state as shown in Figure 3 is folded in half along the long side of the absorbent body 10 in the vertical direction, approximately at the center CL. The two ends of the abdominal waist perimeter 20 and the two ends of the back waist perimeter 30 are joined by heat welding or ultrasonic welding to form a pair of joints 2a and 2b, thereby becoming the underwear-shaped diaper 1 shown in Figures 1 and 2. Joint 2a is a joint on one side in the left-right direction, and joint 2b is a joint on the other side in the left-right direction.

[0093] The absorbent body 10 includes: an absorbent body 11, a liquid-permeable surface sheet 12 disposed on the skin side of the absorbent body 11, a second sheet 13 disposed between the surface sheet 12 and the absorbent body 11, a side sheet 14 disposed on the skin side of the absorbent body 11 and the second sheet 13, a liquid-impermeable back sheet 15 disposed on the non-skin side of the absorbent body 11, and an outer cover sheet 16 disposed on the non-skin side of the back sheet 15.

[0094] The absorbent core 11, when viewed from above, is roughly rectangular in shape and includes: an absorbent core A that absorbs and retains excrement such as urine, and a liquid-permeable core sheet (not shown) covering the absorbent core. Examples of the absorbent core A include: liquid absorbent fibers such as pulp containing superabsorbent polymer (SAP) molded into a predetermined shape, such as a roughly hourglass shape when viewed from above (a molded liquid absorbent fiber), or a so-called SAP sheet molded from superabsorbent polymer (SAP) into a sheet shape. Furthermore, the absorbent core 11A can also be formed by overlapping the SAP sheet and the molded liquid absorbent fiber in the thickness direction; for example, the absorbent core 11A can be formed by sequentially overlapping the SAP sheet, the molded liquid absorbent fiber, and the SAP sheet from the skin side in the thickness direction. The length of the absorbent core 11A in the left-right direction of the diaper 1 is almost the same as the length of the absorbent core 11 in the left-right direction. Examples of core-coated sheets include liquid-permeable sheets such as toilet paper or non-woven fabrics. Alternatively, a structure without a core-coated sheet may also be used.

[0095] As shown in Figure 3, the leg perimeter elastic members 17 located on both sides of the absorbent body 10 in the left and right directions constitute the leg elastic bands. In the panty-type diaper 1, the leg elastic bands are provided along the leg perimeter openings LH, and the diaper 1 fits snugly against the wearer's legs by the stretching and contraction of the leg perimeter elastic members 17. The leg perimeter elastic members 17 of the diaper 1 use multiple rubber cords, for example, folded inwards in the left and right directions to form two layers of outer sheet 16, and between the back sheet 15 and the outer sheet 16, in a state where they extend along the long side of the absorbent body 10.

[0096] On both sides of the absorbent body 10 in the left-right direction, inside the stretch members 17 around the legs, there are leak-proof stretch members 18. Between the two layers of side sheets 14 folded back in the left-right direction, a plurality of leak-proof stretch members 18 are fixed in a state of elongation along the long side, forming a pair of leak-proof sections along the long side. When the diaper 1 is worn, the stretchability of the leak-proof stretch members 18 causes the leak-proof sections to stand upright against the wearer's skin, fitting snugly against the wearer's groin area.

[0097] Examples of elastic expansion members 17 around the legs and elastic expansion members 18 for leak-proof walls include rubber ropes or elastic sheets.

[0098] The ventral waist periphery 20 includes: a skin-side sheet 21, a non-skin-side sheet 22, and a plurality of stretchable members 23. The skin-side sheet 21 and the non-skin-side sheet 22 are joined by bonding methods such as hot melt adhesive, heat, or ultrasonic welding. The skin-side sheet 21 and the non-skin-side sheet 22 are sheet members of approximately the same size and shape, and in this embodiment, they have a generally rectangular shape. The non-skin-side sheet 22 is positioned further away from the skin-side sheet 21 on the non-skin side. As the skin-side sheet 21 and the non-skin-side sheet 22, the following non-stretchable sheets can be used: SMS nonwoven fabric (spunbond, meltblown, spunbond nonwoven fabric), spunbond nonwoven fabric, hot air nonwoven fabric, dot-bonded nonwoven fabric, stretchable nonwoven fabric, plastic sheet, perforated plastic sheet, and laminated sheets of the like.

[0099] The plurality of telescopic members 23 of the abdominal waist perimeter 20 are arranged side by side in the vertical direction between the skin-side sheet 21 and the non-skin-side sheet 22, and are fixed in a state of extension in the horizontal direction. In this way, the abdominal waist perimeter 20 extends and retracts in the horizontal direction, closely fitting the wearer's waist perimeter. Examples of telescopic members 23 include rubber or elastic fibers. On the non-skin-side sheet 22, there is a latching portion 25 that can be latched by the latching portion 51 (described later). The latching portion 25 is the so-called target area, for example, a non-woven fabric sheet. Furthermore, if a Velcro hook member is used in the latching portion 51, it is preferable to use a Velcro ring member or the like in the latching portion 25, selecting a latching portion corresponding to the latching portion 51. Furthermore, as the engaging part 25, instead of providing other components on the non-skin side of the non-skin side sheet 22, the non-skin side sheet 22 made of a component (such as non-woven fabric) that can engage with the engaging part 51 can be directly engaged with the non-skin side of the non-skin side sheet 22.

[0100] The back-side waist perimeter 30 includes: a skin-side sheet 31, a non-skin-side sheet 32, and a plurality of stretchable members 33. The skin-side sheet 31 and the non-skin-side sheet 32 ​​are joined by bonding methods such as hot melt adhesive, heat, or ultrasonic welding. The skin-side sheet 31 and the non-skin-side sheet 32 ​​are sheet members of approximately the same size and shape, and in this embodiment, they have a generally rectangular shape. The non-skin-side sheet 32 ​​is positioned further away from the skin-side sheet 31 on the non-skin side. For example, the skin-side sheet 31 and the non-skin-side sheet 32 ​​can be made of polypropylene SMS nonwoven fabric (spunbond, meltblown, spunbond nonwoven fabric), spunbond nonwoven fabric, hot-air nonwoven fabric, dot-bonded nonwoven fabric, stretchable nonwoven fabric, plastic sheet, perforated plastic sheet, and non-stretchable sheets such as laminated sheets of the like.

[0101] The plurality of elastic members 33 of the back waist perimeter 30 are arranged side by side in the vertical direction between the skin-side sheet 31 and the non-skin-side sheet 32, and are fixed in a state of extension in the horizontal direction. In this way, the abdominal waist perimeter 20 and the back waist perimeter 30 each extend and contract in the horizontal direction, closely fitting the wearer's waist perimeter. Examples of elastic members 23 and 33 include elastic members made of rubber or elastic fibers.

[0102] The connecting part 5 is a so-called tag (grabbing part) member, which is used to form a waist periphery opening when the abdominal waist periphery 20 is cut off. Figure 4 is an enlarged view of part X in Figure 3. In this embodiment, the connecting part 5 has its base end (one side in the left-right direction as shown in Figure 3, etc.) fixed to the side of the abdominal waist periphery 20 that is closer to the center in the left-right direction, and its front end (the other side in the left-right direction as shown in Figure 3, etc.) has a locking part 51 that can be detachably engaged with the non-skin side of the abdominal waist periphery 20.

[0103] The connecting part 5 is a gripping part for the wearer or the person putting the diaper 1 on the wearer (hereinafter also referred to as "the wearer, etc.") to perform a gripping action. It is preferable that the connecting part 5 itself has strength to the point of not breaking. As the connecting part 5, for example, various films such as plastic film and nylon film, non-woven fabric, and films made by laminating non-woven fabric can be used. In this embodiment, the connecting part 5 of the diaper 1 is a sheet-like component made by overlapping three layers of non-woven fabric of the same size on both sides of the plastic film.

[0104] The engaging part 51, located on the skin-side of the connecting part 5, is a component that can be detachably engaged with the non-skin-side of the periphery of the ventral waist portion 20 (specifically, the engaging part 25). Examples of engaging parts 51 include, for instance, hook components of Velcro or adhesive materials such as adhesive sheets. In this embodiment, the engaging part 51 is generally rectangular, but it can also be any shape such as circular.

[0105] As shown in Figure 4, the connecting part 5 is fixed to the periphery of the abdominal waist 20 by the fixing part F1 and the auxiliary fixing part F2. In this embodiment, the fixing part F1 and the auxiliary fixing part F2 are welded parts formed by joining the connecting part 5 and the periphery of the abdominal waist 20 in the thickness direction by heat welding or ultrasonic welding. The connecting part 5 is mainly fixed to the periphery of the abdominal waist 20 by the fixing part F1, and the auxiliary fixing part F2 is used to fix it by the auxiliary fixing part F1.

[0106] ===How to wear diaper 1=== Diapers can be worn in multiple ways. For example, a typical underwear-type diaper (see Figure 1) is designed so that the wearer's feet enter the leg openings LH from the waist opening BH, and the waist openings 20 and 30 are pulled up to surround the wearer's waist, thus achieving the wearing state.

[0107] Furthermore, after wearing the disposable diaper in the form of underwear as described above, the abdominal waist perimeter 20 is cut off by cutting the guide section (described later), and the locking part 51 of the connecting part 5 is locked onto the abdominal waist perimeter 20, forming an opening around the waist, thereby enabling it to be worn. In this way, the locking position of the locking part 51 can be adjusted, making it easy to fit snugly around the wearer's waist.

[0108] In addition, the abdominal waist perimeter 20 can be cut off in advance by cutting off the guide part, so that one side in the left and right directions is in the form of a so-called adhesive diaper (without forming the leg perimeter opening LH), and the other side in the left and right directions is in the form of an underwear diaper (with forming the leg perimeter opening LH), which can also be worn.

[0109] First, the abdominal waist perimeter 20 is cut off by cutting the guide section, allowing the wearer's other foot (the wearer's right foot in diaper 1) to pass through the leg perimeter opening LH on the other side (in the form of an underwear-type diaper) in the left-right direction. Then, the diaper 1 is pulled up to the wearer's crotch area. After that, the engaging part 51 of the connecting part 5 is engaged with the abdominal waist perimeter 20 in a way that fits snugly around the wearer's waist, thereby forming a waist perimeter opening, thus achieving the wearing state.

[0110] By wearing it in this way, even for infants who have difficulty passing their legs through the leg openings LH on both sides of the panty-type disposable diaper, as long as the wearer can pass one leg through the leg opening LH, it can be easily put on by locking it with the connecting part 5 (locking part 51). Furthermore, when the wearer is putting on diaper 1, there may be situations where it is difficult to put on ordinary adhesive diapers (diapers with tape on both sides in the left and right directions) in places such as the toilet. However, by making one side of the left and right sides into a panty-type shape and the other side into a shape with the connecting part 5 (adhesive type), it is easier to put on and easier to adjust the tightness around the waist.

[0111] Furthermore, when removing the used diaper 1 from the body, the abdominal waist perimeter 20 is separated by cutting the guide section, and the diaper 1 is removed from one side of the wearer's body in the left-right direction. The leg on the other side is pulled out from the leg perimeter opening LH in the left-right direction, thereby removing the diaper 1 from the wearer's body.

[0112] ===Regarding the cutting of the 20mm perimeter of the ventral waist=== The cutting of the ventral waist periphery 20 will be explained using Figures 5 and 6. Figure 5 illustrates the separation of the ventral waist periphery 20 and the formation of the waist periphery opening. Figure 6 illustrates the cutting action of the ventral waist periphery 20. Figure 5 also illustrates the structure of the cross-section from the perspective of arrow AA in Figure 4. Please note that Figures 5 and 6 are schematic diagrams, and the dimensions may not be accurate.

[0113] Figure 5A shows the diaper 1 in the panty-like state shown in Figure 1, etc. That is, the abdominal waist perimeter 20 is not cut off, but rather forms a waist perimeter opening that connects the abdominal waist perimeter 20 and the back waist perimeter 30 through joints 2a and 2b. Figures 5B and 6A show the state shown in Figure 5A, with the front end of the joint 5 grasped and pulled towards the non-skin side.

[0114] Then, as shown in Figure 6A, grasp the waist perimeter 20 with one hand and the connecting part 5 with the other hand, and pull them apart to the left and right sides respectively. As shown in Figures 5C and 6B, the abdominal waist perimeter 20 will be cut along the cutting guide, separating one side from the other in the left and right directions. The "cutting guide" refers to the guide part when cutting at least a portion of the abdominal waist perimeter 20. In the diaper 1, the fixing part F1 that fixes the abdominal waist perimeter 20 and the connecting part 5 functions as the cutting guide. Specifically, as shown in Figure 6A, when the abdominal waist periphery 20 and the connecting part 5 are grasped and pulled apart to the left and right, the pulling force is first concentrated at the front end of the cutting guide (fixed part F1), i.e., the cutting guide starting point K. Then, the force is transmitted along the inclined part that slopes upward from the cutting guide starting point K and towards the base end, and the inclined part that slopes downward from the cutting guide starting point K and towards the base end. Then, the abdominal waist periphery 20 is cut off with the end CE on the other side of the fixed part F1 as the boundary, and the abdominal waist periphery 20 is separated into a part without the connecting part 5 and a part with the connecting part 5.

[0115] Then, as needed, as shown in Figure 5D, the engaging portion 51 of the connecting portion 5 is engaged with the engaged portion 25 of the abdominal waist perimeter portion 20, thereby forming the waist perimeter opening of the diaper 1. With the engaging portion 51 engaged with the engaged portion 25, it is possible to engage the engaging portion 51 with the engaged portion 25 such that one side portion of the separated abdominal waist perimeter portion overlaps with the other side portion in the front-to-back direction (thickness direction), or it is possible to engage the engaging portion 51 with the engaged portion 25 such that one side portion of the separated abdominal waist perimeter portion overlaps with the other side portion in the front-to-back direction (thickness direction). By adjusting the engaging position of the engaging portion 51, the size of the waist perimeter opening of the diaper 1 can be adjusted.

[0116] ===About Cutting the Guiding Section=== The diaper 1 has an adjoining portion 2a at one end of the abdominal waist perimeter 20 and the back waist perimeter 30 in the left-right direction. The base end of the adjoining portion 5 is fixed to the abdominal waist perimeter 20 by a fixing portion F1. The front end of the adjoining portion 5 has an engaging portion 51 that can be detachably engaged with the non-skin side of the abdominal waist perimeter 20. At least a portion of the fixing portion F1 that fixes the adjoining portion 5 to the abdominal waist perimeter 20 is a cutting guide portion. Specifically, in the diaper 1, if the abdominal waist perimeter 20 and the adjoining portion 5 are pulled apart to the left and right, the abdominal waist perimeter 20 will be cut off with the other end CE in the left-right direction of the fixing portion F1 (cutting guide portion) as the boundary.

[0117] Figure 7 is an enlarged view of the ventral waist periphery 20 in Figure 3. Figure 8 is an enlarged view of the fixing part F1 and the auxiliary fixing part F2. In Figure 8, the end CE on the other side of the fixing part F1, which will become the boundary, is indicated by a thick line.

[0118] Previously, it was known that tear lines or similar features were provided to cut the waist perimeter portions 20 and 30 of disposable diapers. In contrast, in diaper 1, the fixing part F1, which secures the connecting part 5 to the abdominal waist perimeter portion 20, also functions as a cutting guide, thus eliminating the need for separate cutting guides such as tear lines. This allows for cutting of the abdominal waist perimeter portion 20, and during the manufacturing process of diaper 1, the process for forming tear lines or other cutting guides is unnecessary, providing a diaper 1 manufactured with a simplified process.

[0119] The fixation of the periphery 20 of the ventral waist of the fixing part F1 to the connecting part 5 can be achieved using common fixing methods. For example, it can be fixed by heat or ultrasonic welding, adhesives, etc. Furthermore, in this embodiment, the fixing part F1 of the diaper 1 is a welded part. As described above, it is preferable that the cutting guide part of the diaper 1 is a welded part that joins and fixes the periphery 20 of the ventral waist to the connecting part 5.

[0120] Figure 9A illustrates the cutting guide portion of diaper 1. Figure 9B illustrates the cutting guide portion for the tear line. Figure 9A is an enlarged view of part Y in Figure 5A, and Figure 9B is an enlarged view of the portion with the tear line on the abdominal waistband of a typical disposable diaper. The cutting guide portion of diaper 1 is fixed by welding. As mentioned above, conventional cutting guide portions include tear lines. As shown in Figure 9B, regarding the cutting guide portion formed by the tear line M, there may be a hole or fewer fibers in the skin-side waistband perimeter 20 where the tear line M is located, making it an easily damaged part. Therefore, during the manufacturing process or handling of diaper 1, or when the wearer uses diaper 1, there is a risk of accidentally tearing the abdominal waistband perimeter 20 against the wearer's intention. In response, as shown in Figure 9A, the welding portion is a part where the fibers are melted and fixed, and the total amount of fibers is not reduced. Therefore, the fixing part F1 formed by the welding part functions as a cutting guide, thereby enabling cutting when performing an operation for the purpose of cutting, and reducing the risk of accidentally tearing the periphery of the ventral waist 20 by cutting guide in the absence of the intention to cut.

[0121] As shown in Figure 5, when viewing the diaper 1 from the side of the abdominal waist perimeter 20, the portion overlapping with the fixing part F1, in the front-to-back direction (thickness direction), preferably has a lower melting point for the component closest to the joining part 5 within the abdominal waist perimeter 20 than the component closest to the abdominal waist perimeter 20 within the joining part 5. In the diaper 1, the component closest to the joining part 5 within the abdominal waist perimeter 20 is the non-skin-side sheet 22, and the component closest to the abdominal waist perimeter 20 within the joining part 5 is the non-woven fabric sheet closest to the skin among the three layers. Since the fixing part F1, which is fixed by welding, is made of a material with a lower melting point, it melts more easily, making the melted material easier to cut. Therefore, the melting point of the component (non-skin side sheet 22) closest to the joint 5 of the periphery of the ventral waist 20 is lower than that of the component closest to the periphery of the ventral waist 20 of the joint 5, making it easier to melt. This promotes the melting of the component (non-skin side sheet 22) on the periphery of the ventral waist 20 of the cutting guide (fixed part F1), making it easier to cut the periphery of the ventral waist 20.

[0122] Furthermore, not only the component closest to the joint 5 of the ventral waist periphery 20 (the non-skin-side sheet 22), but also the other components constituting the ventral waist periphery 20 (in this embodiment, the skin-side sheet 21) have a lower melting point than the component closest to the ventral waist periphery 20 of the joint 5. This facilitates the melting of the entire ventral waist periphery 20 compared to the components of the joint 5, making it easier to cut the ventral waist periphery 20.

[0123] Furthermore, as components of the skin-side sheet 21 and non-skin-side sheet 22 of the periphery 20 of the ventral waist region 20 which are welded (melted) by the fixing part F1, and as components of the connecting part 5, non-woven sheets or film sheets made of polyester, polyethylene, polypropylene, polyethylene terephthalate, etc. can be used.

[0124] As a method for cutting the abdominal waist periphery 20 by using the fixed part F1 as the cutting guide, for example as described above, there are methods such as pulling the joint part 5 and the abdominal waist periphery 20 outward in the left and right directions to separate the abdominal waist periphery 20, and tearing the joint part 5 and the abdominal waist periphery 20 apart by twisting them in opposite directions.

[0125] When cutting the abdominal waist perimeter 20 with the cutting guide, when viewing the diaper 1 from the front-to-back direction of the abdominal waist perimeter 20, in the area adjacent to the fixing part F1 at the front end of the connecting part 5, it is preferable to compare the part with the smallest weight per unit area in the connecting part 5 with the part with the largest weight per unit area in the abdominal waist perimeter 20, given that the part with the smallest weight per unit area in the connecting part 5 is larger. Figures 10A and 10B are diagrams illustrating the cutting of the cutting guide. Figure 10A is an enlarged view of part Y in Figure 5A. Figures 10A and 10B are schematic diagrams illustrating the cutting guide and do not necessarily have integration with other figures or the dimensions of the actual product. In Figures 10A and 10B, the thickness of the connecting part 5, which has a larger weight per unit area, is shown as thicker, and the thickness of the abdominal waist perimeter 20, which has a smaller weight per unit area, is shown as thinner.

[0126] In diaper 1, as shown in Figure 10A, when the connecting part 5, which has a larger weight per unit area, and the abdominal waist perimeter part 20, which has a smaller weight per unit area, are fixed by the fixing part F1, as shown in Figure 10B, if the connecting part 5 and the abdominal waist perimeter part 20 are pulled apart to the left and right directions respectively, the tearing force will be concentrated on the fixing part F1, and the abdominal waist perimeter part 20 will be torn apart at the end CE on the other side of the fixing part F1. At this time, when viewed from the side of the abdominal waist perimeter 20, in the area adjacent to the fixing part F1 at the front end of the connecting part 5, the weight per unit area of ​​the connecting part 5 is greater than the weight per unit area of ​​the abdominal waist perimeter 20. Therefore, compared to the case where the weight per unit area of ​​the connecting part 5 is less than the weight per unit area of ​​the abdominal waist perimeter 20, it is easier for the abdominal waist perimeter 20 to be torn apart. The connecting part 5, with its greater weight per unit area, is easier to maintain its fixed position to the fixing part F1. As described above, it is not the connecting part 5 that is easy to cut, but the abdominal waist perimeter 20. This allows the connecting part 5 to engage with the cut and separated abdominal waist perimeter 20, thereby forming an opening around the waist, which can become a diaper 1.

[0127] The weight per unit area of ​​the abdominal waist perimeter 20 and the connecting portion 5 can be compared by cutting out samples from each component, using a unit area (e.g., a 10mm x 10mm square) as the adjacent region. Furthermore, in this embodiment of the diaper 1, at the upper end of the abdominal waist perimeter 20, components such as the skin-side sheet 21 are folded back. Therefore, the part where the folded components overlap the most is the part with the highest weight per unit area of ​​the abdominal waist perimeter 20, and this part is cut out as a sample. Similarly, in the connecting portion 5, where the weight per unit area differs, the part with the highest weight per unit area is cut out as a sample, and the weights of the two samples are compared. Furthermore, the adjacent area refers to a predetermined area extending from the end CE on the other side of the fixing part F1 in the left-right direction to the front end of the connecting part 5. In this embodiment, it is a square of 10mm × 10mm. However, as long as the area adjacent to the front end of the connecting part 5 from the end CE on the other side of the fixing part F1 in the left-right direction has the same structure as the abdominal waist periphery 20 and the laminate of the connecting part 5, the length can be arbitrarily set. Moreover, when the area adjacent to the front end of the connecting part 5 from the end CE on the other side of the fixing part F1 in the left-right direction has the same structure as the abdominal waist periphery 20 and the laminate of the connecting part 5, the weight per unit area can be compared by cutting out any part as a sample.

[0128] Furthermore, when viewing the diaper 1 from the side of the ventral waist perimeter 20 in the front-to-back direction, in the adjacent area of ​​the connecting part 5 adjacent to the fixing part F1, when comparing the part with the smallest weight per unit area in the connecting part 5 with the part with the largest weight per unit area in the ventral waist perimeter 20, it is preferable that the part with the smallest weight per unit area in the connecting part 5 is larger.

[0129] The ventral waist perimeter 20 of the diaper 1 in this embodiment is formed by overlapping thin sheet members (waist perimeter thin sheet members) of skin-side sheet 21 and non-skin-side sheet 22. The connecting part 5 is formed by overlapping three thin sheet members (connecting part thin sheet members) of non-woven fabric sheet, film sheet, and non-woven fabric sheet. As shown in FIG10A, the diaper 1 has a larger weight per unit area of ​​the connecting part thin sheet member (three-layer thin sheet member) of the connecting part 5, and a smaller weight per unit area of ​​the waist perimeter thin sheet members (skin-side sheet 21 and non-skin-side sheet 22) of the ventral waist perimeter 20. As shown in FIG10B, if the joint 5 and the abdominal waist periphery 20 are pulled apart to the left and right directions respectively, the tearing force will be concentrated on the fixed part F1, and the abdominal waist periphery 20 will be torn apart at the end CE on the other side of the fixed part F1. At this time, when viewed from the side of the ventral waist perimeter 20, in the adjacent area adjacent to the fixing part F1 from the front end of the joint 5, the weight per unit area of ​​the joint sheet member (three-layer sheet member) of the joint 5 is greater than the weight per unit area of ​​the waist perimeter sheet member (skin-side sheet 21 and non-skin-side sheet 22) of the ventral waist perimeter 20. Therefore, if the ventral waist perimeter 20 is torn apart, the joint 5 can easily maintain its fixed state to the fixing part F1. As described above, the part that is easy to cut is not the connecting part 5, but the periphery of the ventral waist 20, so that the connecting part 5 can be engaged with the cut and separated periphery of the ventral waist 20, thereby forming a waist periphery opening, which can become a diaper 1.

[0130] The weight per unit area of ​​the ventral waist periphery 20 and the joint 5 is measured, for example, by cutting samples from each component, using a unit area (e.g., a 10mm × 10mm square) as the adjacent region, and separating the laminated sheet components by immersing them in toluene or the like. The waist periphery sheet components (skin-side sheet 21, non-skin-side sheet 22) and the joint sheet components (three-layer sheets) are taken separately. Furthermore, if there is residual adhesive on each sheet component, it is completely removed with toluene or the like. Afterwards, each sheet component is dried at room temperature for 24 hours, and the weight of each sheet component is measured. The sum of the separated sheet components for each sample is calculated for comparison. In other words, the weight of the adhesive (hot melt adhesive) used to join the sheet components is measured and compared at the ventral waist periphery 20 and the joint 5. Furthermore, in this embodiment of the diaper 1, at the upper end of the abdominal waist perimeter 20, the skin-side sheet 21 and other components are folded back. Therefore, the part where the folded components overlap the most is the part with the largest weight per unit area of ​​the waist perimeter sheet component of the abdominal waist perimeter 20, and this part is cut out as a sample. Similarly, in the connecting part 5, where the weight per unit area is partially different, the part with the largest weight per unit area of ​​the connecting part sheet component is cut out as a sample, and the weight of the adhesive removed from the two samples is compared. Furthermore, the adjacent area refers to a predetermined area from the end CE on the other side of the fixing part F1 in the left-right direction to the front end of the connecting part 5. In this embodiment, it is a 10mm × 10mm square, but as long as the area adjacent to the front end of the connecting part 5 from the end CE on the other side of the fixing part F1 in the left-right direction is the same as the structure of the abdominal waist perimeter 20 and the connecting part 5, the length can be arbitrarily set. Furthermore, when the area adjacent to the front end of the joint 5 at the end CE on the other side of the left-right direction of the fixing part F1 is constructed in the same way as the periphery of the ventral waist part 20 and the stacking of the joint 5, the weight per unit area can be compared by cutting out any part as a sample.

[0131] Furthermore, it is preferable that the entire fixing part F1 is a cutting guide. Compared to the case where only a part of the fixing part F1 is a cutting guide, it is easier to cut along the periphery of the ventral waist 20 along the fixing part F1.

[0132] The diaper 1 of this embodiment has a cutting guide (fixing part F1) on the abdominal waist periphery 20. It is preferable that the cutting guide on the abdominal waist periphery 20 is continuous from the upper end to the lower end in the vertical direction. That is, it is preferable that the cutting guide, i.e., the fixing part F1, is continuous from the upper end to the lower end of the abdominal waist periphery 20. By making the cutting guide continuous from the upper end to the lower end of the abdominal waist periphery 20, compared to a case where the cutting guide is not continuous, the abdominal waist periphery 20 can be cut along the cutting guide, making complete separation easier.

[0133] As shown in Figure 8, the foremost end K of the cutting guide (fixed part F1) is the cutting guide starting point K. The cutting guide starting point K is the part where force is most easily concentrated when force is applied to the abdominal waist periphery 20 and the connecting part 5 in order to cut the abdominal waist periphery 20 with the cutting guide, and it is also the part where cutting is most easily initiated. Furthermore, as shown in Figure 8, the cutting guide preferably has inclined portions fa1 and fb1 that slope vertically from the foremost end K toward the base end. This allows the force exerted when the wearer pulls the abdominal waist periphery 20 and the connecting part 5 apart to be easily concentrated at the cutting guide starting point K, and this force is easily transmitted from the cutting guide starting point K to the inclined portions fa1 and fb1, thus easily cutting the abdominal waist periphery 20 into a shape along the cutting guide.

[0134] Furthermore, the "inclination" of the inclined parts fa1 and fb1 refers to the inclination in the vertical and horizontal directions, and is not limited to the straight inclined parts fa1 and fb1 of the diaper 1. Curved parts are also acceptable.

[0135] Furthermore, as shown in Figure 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 that slopes upwards and downwards from the end K (the starting point of the cutting guide) on the foremost end side, and the lower inclined portion fb1 is an inclined portion that slopes downwards and downwards from the end K (the starting point of the cutting guide) on the foremost end side, and downwards and downwards. In this way, in order to cut the abdominal waist periphery 20 with the cutting guide portion, the force applied to the abdominal waist periphery 20 and the connecting portion 5 will first be easily concentrated at the cutting guide starting point K, and the force concentrated at the cutting guide starting point K will be easily transmitted to the upper inclined portion fa1 and the lower inclined portion fb1, thereby facilitating the cutting of the abdominal waist periphery 20.

[0136] Furthermore, among the angles between the upper inclined portion fa1 and the lower inclined portion fb1, it is preferable that the angle θ at the base end in the left-right direction is an obtuse angle (an angle larger than 90 degrees and smaller than 180 degrees). This facilitates the transmission of force applied to the upper inclined portion fa1 and the lower inclined portion fb1 from the cutting guide point K, making it easier to cut the periphery 20 of the ventral waist, and compared to the case where θ is an acute angle, the length of the cutting guide portion (fixed portion F1) in the left-right direction can be shortened.

[0137] As shown in Figure 7, in the left-right direction, the cutting guide point K is preferably located on a side further away from the absorbent core 11A. The absorbent core 11A is the thick part of the diaper 1, and is a part with high rigidity, so it is not easy to cut the abdominal waist perimeter 20. Therefore, by setting the cutting guide point K on a side further away from the absorbent core 11A in the left-right direction, the ease of cutting the abdominal waist perimeter 20 can be improved.

[0138] Regarding the connecting part 5, which is fixed by the fixing part F1 to the periphery of the ventral waist 20, it is preferable that the cutting guide is located between the connecting part 2a and the absorbent core 11A in the left-right direction. That is, it is preferable that the fixing part F1 is located between the connecting part 2a and the absorbent core 11A in the left-right direction. The absorbent core 11A has thickness and high rigidity, and is a part of the periphery of the ventral waist 20 that is not easy to cut. Therefore, by providing the cutting guide between the connecting part 2a and the absorbent core 11A in the left-right direction, the ease of cutting the periphery of the ventral waist 20 can be improved.

[0139] Furthermore, as shown in Figure 4, it is preferable to overlap the cutting guide point K with the engaging portion 51 in the vertical direction. As shown in Figures 6A and 6B, when cutting the ventral waist periphery 20 along the cutting guide, the engaging portion 51 of the joint 5 is held more firmly. Therefore, by overlapping the cutting guide point K with the engaging portion 51 in the vertical direction, the force applied to the joint 5 can be easily transmitted to the cutting guide point K during cutting, making it easier to cut along the ventral waist periphery 20 of the cutting guide.

[0140] Furthermore, as shown in Figure 4, it is preferable that the length H from the cutting guide point K to the end of the front end of the joint 5 (the other end) in the left-right direction is 50 mm or more. As shown in Figures 6A and 6B, when cutting the abdominal waist perimeter 20 by grasping the abdominal waist perimeter 20 and the joint 5 and pulling them apart in the left-right direction, if the length from the cutting guide point K to the end of the front end of the joint 5 in the left-right direction is less than 50 mm, it will be difficult to grasp the joint 5 by hand, or difficult to apply force when pulling it apart. Therefore, by making the length H from the cutting guide point K to the end of the front end of the joint 5 in the left-right direction 50 mm or more, it is easier for the wearer to cut the abdominal waist perimeter 20.

[0141] It is preferable to have an auxiliary fixing part F2 for assisting in fixing the joint 5 to the abdominal waist periphery 20. This auxiliary fixing part F2 is preferably arranged at intervals in the vertical direction on the base end side (one side in the left-right direction) of the joint 5, further than the cutting guide part (fixing part F1). As shown in Figure 8, a plurality of generally elliptical auxiliary fixing parts F2 are arranged at intervals along the cutting guide part on the base end side. Like the fixing part F1, the auxiliary fixing parts F2 are the part that welds the joint to the abdominal waist periphery 20. By having the auxiliary fixing parts F2, the fixation of the joint 5 to the abdominal waist periphery 20 caused by the fixing part F1 is strengthened, and the risk of cutting the abdominal waist periphery 20 from the auxiliary fixing parts F2 is reduced by the spaced-apart auxiliary fixing parts F2. In particular, by arranging the auxiliary fixing parts F2 at intervals, when force is applied to the joint 5 from the end on the base end side toward the front end side, the risk of cutting off the periphery of the ventral waist 20 with the end on the base end side of the auxiliary fixing parts F2 as the boundary can be reduced.

[0142] Furthermore, the diaper 1 has a plurality of protruding fixing parts that protrude from the fixing part F1 toward the base end between the fixing part F1 and the auxiliary fixing part F2. The plurality of protruding fixing parts are arranged at intervals in the vertical direction. Like the auxiliary fixing part F2, the protruding fixing parts strengthen the fixation between the joint 5 caused by the fixing part F1 and the abdominal waist perimeter 20, and the spaced protruding fixing parts can reduce the risk of cutting off the abdominal waist perimeter 20 starting from the protruding fixing parts.

[0143] Furthermore, it is preferable that the portion of the abdominal waist periphery 20, which is provided with the fixing part F1, at a predetermined distance from the cutting guide towards the front end of the connecting part 5, is a non-stretchable area where the abdominal waist periphery 20 will not stretch or contract in the left or right direction. When the wearer or others grasp the connecting part 5 to pull it open in order to cut the abdominal waist periphery 20, the force applied can be buffered by the stretching of the abdominal waist periphery 20 itself, making it easier to apply the force when pulling open the connecting part 5 to the cutting guide (fixing part F1), thereby facilitating the cutting of the abdominal waist periphery 20 caused by pulling open the connecting part 5.

[0144] As shown in Figures 4 and 7, the abdominal waist perimeter 20 of the diaper 1 has a telescopic member 23 that extends and retracts in the left and right directions, and has a telescopic region S that extends and retracts in the left and right directions and a non-telescopic region N that does not extend and retract in the left and right directions. The telescopic region S of the abdominal waist perimeter 20 refers to the area where the telescopic member 23 can extend and retract. Specifically, in the left and right direction, the area between the central part and the side end from the central part to the side of the connecting part 5 is the non-telescopic region N. The telescopic region S has, in the left and right direction, a one-sided telescopic region Sa provided on one side and a other-sided telescopic region Sb provided on the other side. The area from the connecting part 2a on one side to the side end of the connecting part 5 on the other side is the one-sided telescopic region Sa, and the area from the connecting part 2b on the other side to the central part is the other-sided telescopic region Sb. That is to say, when viewed from the abdominal waist perimeter 20, the part of the abdominal waist perimeter 20 that overlaps with the connecting part 5 is the non-telescopic region N. Therefore, by providing a non-stretchable region N from the cutting guide (fixed part F1) toward the front end of the connecting part 5, the force applied to the connecting part 5 can be easily applied to the cutting guide.

[0145] Furthermore, the predetermined distance "from the cutting guide towards the front end of the connecting part 5" can be set to any length. However, in the left-right direction, the longer the length of the non-stretchable area N adjacent to the cutting guide (fixed part F1) from the front end (the other side), the more the force applied to the connecting part 5 is buffered due to stretching, and the easier it is to apply to the cutting guide. Therefore, the "determined distance" of the non-stretchable area N of the diaper 1 in this embodiment is longer than the distance from the cutting guide to the front end of the connecting part 5.

[0146] As a non-stretchable region N of the ventral waist periphery 20, this can be achieved, for example, by not providing the telescopic member 23. Furthermore, even if the telescopic member 23 or a telescopic sheet or similar telescopic member is provided throughout the entire ventral waist periphery 20, multiple welded portions can be provided at positions corresponding to the non-stretchable region N, thereby making the desired position of the ventral waist periphery 20 non-stretchable.

[0147] Furthermore, the periphery of the ventral waist 20 not only has a non-stretchable area N, but the joint 5 itself is preferably non-stretchable. In this way, the force that pulls the joint 5 and the periphery of the ventral waist 20 outwards can be buffered by the stretching of the joint 5, making it easier to apply force to the cutting guide, thus making it easier to cut the periphery of the ventral waist 20.

[0148] Furthermore, regarding the ventral waist periphery 20, the area from the left-right cutting guide to the side end of the absorbent core 11A (the base end side of the joint 5) is preferably not stretched or contracted in the left-right direction (non-stretching area N). This reduces the impact of stretching on the joint 5, making it easier to apply force to the cutting guide and thus facilitating the cutting of the ventral waist periphery 20 using the joint 5.

[0149] Regarding the abdominal waist perimeter 20 with the fixing part F1, it is preferable to apply adhesive to the portion extending a predetermined distance from the cutting guide towards the front end of the joint 5. Generally, the portion of the abdominal waist perimeter 20 with adhesive applied has higher rigidity than the portion without adhesive. Therefore, by applying adhesive to the portion of the abdominal waist perimeter 20 extending a predetermined distance from the cutting guide towards the front end of the joint 5, the rigidity of that predetermined distance is increased. When the wearer or others grasp the joint 5 to pull the abdominal waist perimeter 20 apart in order to cut it, the force is easily applied to the cutting guide (fixing part F1), thereby facilitating the cutting of the abdominal waist perimeter 20 by pulling apart the joint 5.

[0150] The adhesive applied to the periphery 20 on the ventral side can be a hot melt adhesive or similar adhesive used to fix the components such as the skin-side sheet 21 or the non-skin-side sheet 22, or an adhesive not intended for bonding the components together. Furthermore, the "predetermined distance" for applying the adhesive can be set to any length. However, the longer (wider) the area with the adhesive applied from the front end side (the other side) adjacent to the cutting guide (fixed part F1) in the left-right direction, the easier it is to apply the force applied to the joint 5 to the cutting guide. Therefore, the "predetermined distance" of the adhesive applied in the diaper 1 of this embodiment is longer than the distance from the cutting guide to the front end of the joint 5.

[0151] ===Other Implementation Forms=== While the first embodiment has been described above, it is intended to facilitate understanding of the invention and is not intended to limit or interpret the invention. Furthermore, the invention can be modified or improved without departing from its spirit, and such equivalents are included in the invention.

[0152] In the above embodiment, the fixing part F1 is used to fix the connecting part 5 and the abdominal waist periphery 20, so that the engaging part 51 engages with the non-skin side of the abdominal waist periphery 20, but it is not limited to this. The fixing part F1 can also be used to fix the connecting part 5 and the abdominal waist periphery 20, so that the engaging part 51 engages with the non-skin side of the dorsal waist periphery 30. Furthermore, the fixing part F1 can also be used to fix the connecting part 5 and the dorsal waist periphery 30, so that the engaging part 51 engages with the non-skin side of either the abdominal waist periphery 20 or the dorsal waist periphery 30.

[0153] In the above embodiment, the connecting part 5 is provided on one side of the diaper 1 in the left-right direction, that is, on the wearer's left side, but it is not limited to this. The connecting part 5 can also 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 it is desired to accommodate a right-handed wearer, the connecting part 5 is provided on one side of the diaper 1 in the left-right direction (the wearer's left side), thereby improving the operability of the connecting part 5 for the wearer.

[0154] Furthermore, in the above-described embodiment, on one side of the diaper 1 in the left-right direction, there is a connecting part 5 that is fixed by the cutting guide part, i.e., the fixing part F1. On the other side in the left-right direction, the waist perimeter parts 20 and 30 are connected by a connecting part 2b, and the connecting part 5 is not present. However, this is not a limitation. On one side of the diaper 1 in the left-right direction, there is a connecting part 5 that is fixed by the cutting guide part, i.e., the fixing part F1. On the other side in the left-right direction, the waist perimeter parts 20 and 30 are also connected by a connecting part 2b, and the connecting part is fixed by the cutting guide part, i.e., the fixing part. Alternatively, the connecting part 2b on the other side in the left-right direction may not be present, and a so-called fastening tape may be provided on either side of the waist perimeter parts 20 and 30.

[0155] In the above embodiment, the fixing part F1 extends continuously from the upper end to the lower end of the ventral waist periphery 20, and the entire fixing part F1 is a cut-off guide part, but it is not limited to this. The fixing part F1 may be discontinuous, or it may not extend to the upper or lower end of the ventral waist periphery 20. A portion of the fixing part F1 may also be a cut-off guide part. For example, the fixing part F1 may be discontinuous, or the straight fixing part F1 may branch off along the way, or a portion of the fixing part F1 may constitute a cut-off guide part.

[0156] In the above embodiment, regarding the cutting guide (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 connecting part 5 is an obtuse angle, but it is not limited to this. Regarding the cutting guide (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 connecting part 5 can also be an acute angle. By making the angle θ an acute angle, when the wearer or others apply a cutting force to the cutting guide, the force will first be concentrated at the cutting guide starting point K. This concentrated force is more easily transmitted to the upper inclined part fa1 and the lower inclined part fb1, which have a high slope in the vertical direction, compared to the case where the angle θ is an obtuse angle, thus facilitating the cutting of the cutting guide.

[0157] In the above embodiment, the cutting guide portion has an upper inclined portion fa1 that slopes upward from the cutting guide starting point K and towards the base end, and a lower inclined portion fb1 that slopes downward from the cutting guide starting point K and towards the base end, but is not limited to this. Figure 11 is a diagram illustrating a modified example of the cutting guide portion. In Figure 11, the auxiliary fixing portion F2, the engaging portion 51, etc., are omitted. As shown in Figure 11A, the cutting guide portion (fixing portion F1) may also have a shape in which the cutting guide starting point K is located at the upper (or lower) end of the abdominal waist periphery portion 20 and has an inclined portion. Furthermore, as shown in Figure 11B, the cutting guide portion (fixing portion F1) may also have an inclined portion that slopes downward from the upper end (cutting guide starting point K) of the abdominal waist periphery portion 20 and towards the base end, and an inclined portion that slopes upward from the lower end (cutting guide starting point K) of the abdominal waist periphery portion 20 and towards the base end. The shape shown in Figure 11B can be further modified, as shown in Figure 11C, by providing a cutting guide starting point K at the center of the joint 5 in the vertical direction, and the cutting guide part (fixed part F1) may have a curved part that bends upward from the cutting guide starting point K toward the base end, and a curved part that bends downward from the cutting guide starting point K toward the base end. In addition, the cutting guide part may also have a shape along the vertical direction (not shown).

[0158] Furthermore, as described above, the diaper 1 is held by grasping the perimeter of the abdominal waist 20 with one hand and the connecting part 5 with the other hand, and pulled outwards to the left and right respectively. This allows the perimeter of the abdominal waist 20 to be cut along the cutting guide. In Figures 6A and 6B, the hand grasping the perimeter of the abdominal waist 20 and the hand grasping the connecting part 5 are pulled horizontally (parallel to the width direction of the diaper 1). This concentrates the force at the cutting guide point K located at the foremost end of the connecting part 5, and the perimeter of the abdominal waist 20 is cut from the cutting guide point K along the cutting guide (fixed part F1). However, this method is not limited to this type of cutting. For example, the connecting part 5 can be pulled out with the front end facing downwards or upwards, and the perimeter of the abdominal waist 20 can be cut by pulling the connecting part 5 in any direction.

[0159] Figure 12 is a diagram illustrating a modified example of the cutting guide portion. Figure 12 shows a modified example of part X of the diaper 1 shown in Figure 3. In the part that is common to the structure of the diaper 1 described above, the symbols are the same and the detailed description of the basic structure of the diaper 1 is omitted. The main focus is on the structure of the cutting guide portion (fixed part F1), which is different from the diaper 1 described above.

[0160] As shown in Figure 12, the fixing part F1, which secures the periphery of the ventral waist 20 to the connecting part 5, functions as a cutting guide. As shown in Figure 12, the end CE on the other side (front end side) of the fixing part F1 may also have a concave-convex portion. In the fixing part F1 shown in Figure 12, the end CE on the other side has a recessed portion fx that is recessed to the left or right (base end side) and a protruding portion fy that is protruding to the left or right (front end side), alternately arranged throughout the entire area of ​​the fixing part F1 in the vertical direction. With this recessed portion fx and protruding portion fy (convex-convex portion), it is easy to set the cutting guide starting point K, and it is easy to cut the periphery of the ventral waist 20 from the cutting guide point K using the cutting guide (fixing part F1).

[0161] In the cutting guide portion (fixed portion F1) shown in Figure 12, the concave portion fx and the convex portion fy (concave-convex portion) are such that the boundary between the concave portion fx and the convex portion fy is the cutting guide starting point K. Since the fixed portion F1 shown in Figure 12 has a plurality of concave portions fx and a plurality of convex portions fy, the cutting guide portion has a plurality of cutting guide starting points K. For example, when a wearer grasps the perimeter of the waist area 20 with one hand and the connecting portion 5 with the other hand, and pulls the connecting portion apart in the direction of arrow PLA in Figure 12 (towards one side (base end side) and downwards), the boundary between the concave portion fx and the convex portion fy in the fixed portion F1 of the connecting portion 5, which is located above the center in the vertical direction, becomes the cutting guide starting point K, making it easier to cut using the cutting guide portion. Furthermore, when a wearer grasps the periphery of the waist 20 with one hand and the joint 5 with the other, and pulls the joint 5 in the direction of arrow PLb in Figure 12 (towards one of the left and right directions (the base end side) and the upper side), the boundary between the concave portion fx and the convex portion fy, which is located in the fixing portion F1 of the joint 5 and is located in the vertical direction below the center, becomes the cutting guide point K, making it easy to cut with the cutting guide. The cutting guide (fixing portion F1) shown in Figure 12 has a plurality of concave portions fx and convex portions fy alternately provided throughout the vertical direction of the fixing portion F1, and a plurality of cutting guide points K are provided. Therefore, the direction of pulling the joint is not limited to directions PLA and PLb, and the cutting guide point K corresponding to the direction of pulling the joint 5 caused by the wearer is used as the cutting point, making it easy to cut the periphery of the waist 20.

[0162] The cutting guide (fixed part F1) can also have the structure shown in Figures 13A and 13B. Figure 13 is a diagram illustrating a modified example of the cutting guide. In Figures 13A and 13B, only the shape of the fixed part F1 (cutting guide) is shown. As shown in Figure 13A, the cutting guide (fixed part F1) can also have: a protrusion fy protruding to the other side (front end side) in the left-right direction, and a recess fx located on the side further left-right in the left-right direction than the protrusion fy (base end side). Similarly, as shown in Figure 13B, the cutting guide (fixed part F1) can also have: a recess fx recessed to the one side (base end side) in the left-right direction, and a protrusion fy protruding to the other side (front end side) in the left-right direction. In the fixed part F1 shown in Figures 13A and 13B, a plurality of recesses fx and a plurality of protrusions fy are alternately provided in the vertical direction throughout the entire area of ​​the fixed part F1. The cutting guide starting point K in Figures 13A and 13B is the vertex of the front end side of each convex part fy.

[0163] The cutting guide portion (fixed portion F1) shown in Figures 13A and 13B is also used when the wearer, etc., grasps the perimeter of the waist area 20 with one hand and the joint portion 5 with the other hand, and pulls the joint portion apart in the direction of arrow PLA in Figures 13A and 13B (towards the left-right direction (base end side) and downwards). In this case, the portion (upper inclined portion fa1) located above the center in the vertical direction of the fixed portion F1 of the joint portion 5 becomes the cutting guide starting point K. Furthermore, when the wearer, etc., grasps the perimeter of the waist area 20 with one hand and the joint portion 5 with the other hand, and pulls the joint portion apart in the direction of arrow PLb in Figures 13A and 13B (towards the left-right direction (base end side) and upwards), the portion (lower inclined portion fb1) located below the center in the vertical direction of the fixed portion F1 of the joint portion 5 becomes the cutting guide starting point K. The fixing part F1 shown in Figures 13A and 13B is similar to the fixing part F1 shown in Figure 12. It has a plurality of recesses fx and protrusions fy that are alternately provided throughout the entire vertical direction of the fixing part F1, and a plurality of cutting guide points K are provided. Therefore, the direction of pulling open the joint is not limited to the directions PLA and PLb. The cutting guide point K corresponding to the pulling open direction of the joint 5 caused by the wearer, etc., will be used as the cutting point, and the periphery of the abdominal waist 20 can be easily cut off.

[0164] In the above embodiment, although the diaper with the abdominal waist perimeter 20 and the dorsal waist perimeter 30 being separate components is exemplified, a crotch portion is provided between the abdominal waist perimeter 20 and the dorsal waist perimeter 30, so that the abdominal waist perimeter 20 and the dorsal waist perimeter 30 can be a continuous single component.

[0165] ===Second Implementation Form=== The following description uses a disposable diaper in the form of underwear for infants as an example of the absorbent article of the present invention. However, the absorbent article of the present invention is not limited to disposable diapers for infants, but can also be used in disposable diapers for adults, menstrual underwear, etc.

[0166] ===Construction of Disposable Diaper 1=== Figure 14 is a perspective view of the disposable diaper 1 (hereinafter referred to as "diaper") in the wearing state according to the second embodiment, viewed from one side in the left-right direction. Figure 15 is a top view of the diaper 1 in its natural state, viewed from the side of the abdominal waist perimeter 20. Figure 16 is a top view of the diaper 1 in its unfolded and extended state, viewed from the non-skin side. The center line CC in Figures 16, etc., is the center line in the left-right direction in the extended state. Also, Figure 16 shows the unfolded and extended state of the panty-type diaper 1 shown in Figures 14 and 15. Hereinafter, the center line CC in the left-right direction of the diaper 1 in each figure is the center line in the extended state.

[0167] "Natural state" refers to the state of the diaper 1 after a predetermined time. For example, the diaper 1 in its product state is removed from the packaging, and the waist area 30 on the back is pulled outwards to the left and right, so that the waist area 20 and 30 are in an "extended state." This extended state is maintained for 15 seconds, after which the stretching of the diaper 1 is released and it is placed on a flat surface such as a table. Then, the state after being placed on such a flat surface for 5 minutes is defined as the natural state.

[0168] "Unfolded state" refers to the state in which the two sides of the diaper 1 in its panty-like state, namely the two side ends of the abdominal waist perimeter 20 and the two side ends of the back waist perimeter 30, are separated and unfolded to form a flat surface. "Stretched state" refers to the state in which the elastic members of the diaper 1 are stretched to the point where wrinkles of the diaper 1 are no longer visible. Specifically, it means that the dimensions of each component constituting the diaper 1 (such as the abdominal waist perimeter 20, which will be described later) are stretched to a size that is the same as or close to the size of the individual component.

[0169] The diaper 1, in the panty-like state shown in Figures 14 and 15, has an opening around the waist (BH) and a pair of openings around the legs (LH) in the vertical, horizontal, and front-back directions. In the vertical direction, the side with the waist opening (BH) is the upper side, and the side below the crotch is the lower side. In the front-back direction, the side facing the wearer's abdomen is the front side, and the side facing the wearer's back is the back side. Furthermore, the direction in which the materials constituting the diaper 1 are layered is called the thickness direction; the side in the thickness direction that contacts the wearer is called the skin side, and the side opposite to the skin side is called the non-skin side. Also, the thickness direction is the same as the front-back direction in its natural state.

[0170] The diaper 1 on the underwear side is a so-called three-piece design, having an absorbent body 10, a ventral waist perimeter 20, and a dorsal waist perimeter 30. The ventral waist perimeter 20 covers the wearer's ventral side, and the dorsal waist perimeter 30 covers the wearer's dorsal side. The diaper 1 also has a connecting part 5.

[0171] In the unfolded state of the diaper 1 shown in Figure 16, the abdominal waist perimeter 20 and the back waist perimeter 30 are arranged such that their long sides run along the left-right direction of the diaper 1. Then, at the center of the abdominal waist perimeter 20 in the left-right direction, one end of the absorbent body 10 in the long side direction is disposed, and at the center of the back waist perimeter 30 in the left-right direction, the other end of the absorbent body 10 in the long side direction is disposed, thereby forming the crotch area 40. The absorbent body 10 is positioned closer to the skin than the abdominal waist perimeter 20 and the back waist perimeter 30.

[0172] The diaper 1 in its unfolded state as shown in Figure 16 is folded in half along the long side of the absorbent body 10, approximately at the center CL. The two ends of the abdominal waist perimeter 20 and the two ends of the back waist perimeter 30 are joined by heat welding or ultrasonic welding to form a pair of joints 2a and 2b, thereby becoming the underwear-shaped diaper 1 shown in Figures 14 and 15. Joint 2a is a joint on one side in the left-right direction, and joint 2b is a joint on the other side in the left-right direction.

[0173] The absorbent body 10 includes: an absorbent body 11, a liquid-permeable surface sheet 12 disposed on the skin side of the absorbent body 11, a second sheet 13 disposed between the surface sheet 12 and the absorbent body 11, a side sheet 14 disposed on the skin side of the absorbent body 11 and the second sheet 13, a liquid-impermeable back sheet 15 disposed on the non-skin side of the absorbent body 11, and an outer cover sheet 16 disposed on the non-skin side of the back sheet 15.

[0174] The absorbent core 11, when viewed from above, is roughly rectangular in shape and includes: an absorbent core A that absorbs and retains excrement such as urine, and a liquid-permeable core sheet (not shown) covering the absorbent core. Examples of the absorbent core A include: liquid absorbent fibers such as pulp containing superabsorbent polymer (SAP) molded into a predetermined shape, such as a roughly hourglass shape when viewed from above (a molded liquid absorbent fiber), or a so-called SAP sheet molded from superabsorbent polymer (SAP) into a sheet shape. Furthermore, the absorbent core 11A can also be formed by overlapping the SAP sheet and the molded liquid absorbent fiber in the thickness direction; for example, the absorbent core 11A can be formed by sequentially overlapping the SAP sheet, the molded liquid absorbent fiber, and the SAP sheet from the skin side in the thickness direction. The length of the absorbent core 11A in the left-right direction of the diaper 1 is almost the same as the length of the absorbent core 11 in the left-right direction. Examples of core-coated sheets include liquid-permeable sheets such as toilet paper or non-woven fabrics. Alternatively, a structure without a core-coated sheet may also be used.

[0175] As shown in Figure 16, the leg perimeter elastic members 17 located on both sides of the absorbent body 10 in the left and right directions constitute the leg elastic bands. In the panty-type diaper 1, the leg elastic bands are provided along the leg perimeter openings LH, and the diaper 1 fits snugly against the wearer's legs by the stretching and contraction of the leg perimeter elastic members 17. The leg perimeter elastic members 17 of the diaper 1 use multiple rubber cords, for example, folded inwards in the left and right directions to form two layers of outer sheet 16, and between the back sheet 15 and the outer sheet 16, in a state where they extend along the long side of the absorbent body 10.

[0176] On both sides of the absorbent body 10 in the left-right direction, inside the stretch members 17 around the legs, there are leak-proof stretch members 18. Between the two layers of side sheets 14 folded back in the left-right direction, a plurality of leak-proof stretch members 18 are fixed in a state of elongation along the long side, forming a pair of leak-proof sections along the long side. When the diaper 1 is worn, the stretchability of the leak-proof stretch members 18 causes the leak-proof sections to stand upright against the wearer's skin, fitting snugly against the wearer's groin area.

[0177] Examples of elastic expansion members 17 around the legs and elastic expansion members 18 for leak-proof walls include rubber ropes or elastic sheets.

[0178] The ventral waist periphery 20 includes: a skin-side sheet 21, a non-skin-side sheet 22, and a plurality of stretchable members 23. The skin-side sheet 21 and the non-skin-side sheet 22 are joined by bonding methods such as hot melt adhesive, heat, or ultrasonic welding. The skin-side sheet 21 and the non-skin-side sheet 22 are sheet members of approximately the same size and shape, and in this embodiment, they have a generally rectangular shape. The non-skin-side sheet 22 is positioned further away from the skin-side sheet 21 on the non-skin side. As the skin-side sheet 21 and the non-skin-side sheet 22, the following non-stretchable sheets can be used: SMS nonwoven fabric (spunbond, meltblown, spunbond nonwoven fabric), spunbond nonwoven fabric, hot air nonwoven fabric, dot-bonded nonwoven fabric, stretchable nonwoven fabric, plastic sheet, perforated plastic sheet, and laminated sheets of the like.

[0179] The plurality of telescopic members 23 of the abdominal waist perimeter 20 are arranged side by side in the vertical direction between the skin-side sheet 21 and the non-skin-side sheet 22, and are fixed in a state of extension in the horizontal direction. In this way, the abdominal waist perimeter 20 extends and retracts in the horizontal direction, closely fitting the wearer's waist perimeter. Examples of telescopic members 23 include rubber or elastic fibers. On the non-skin-side sheet 22, there is a latching portion 25 that can be latched by the latching portion 51 (described later). The latching portion 25 is the so-called target area, for example, a non-woven fabric sheet. Furthermore, if a Velcro hook member is used in the latching portion 51, it is preferable to use a Velcro ring member or the like in the latching portion 25, selecting a latching portion corresponding to the latching portion 51. Furthermore, as the engaging part 25, instead of providing other components on the non-skin side of the non-skin side sheet 22, the non-skin side sheet 22 made of a component (such as non-woven fabric) that can engage with the engaging part 51 can be directly engaged with the non-skin side of the non-skin side sheet 22.

[0180] The back-side waist perimeter 30 includes: a skin-side sheet 31, a non-skin-side sheet 32, and a plurality of stretchable members 33. The skin-side sheet 31 and the non-skin-side sheet 32 ​​are joined by bonding methods such as hot melt adhesive, heat, or ultrasonic welding. The skin-side sheet 31 and the non-skin-side sheet 32 ​​are sheet members of approximately the same size and shape, and in this embodiment, they have a generally rectangular shape. The non-skin-side sheet 32 ​​is positioned further away from the skin-side sheet 31 on the non-skin side. For example, the skin-side sheet 31 and the non-skin-side sheet 32 ​​can be made of polypropylene SMS nonwoven fabric (spunbond, meltblown, spunbond nonwoven fabric), spunbond nonwoven fabric, hot-air nonwoven fabric, dot-bonded nonwoven fabric, stretchable nonwoven fabric, plastic sheet, perforated plastic sheet, and non-stretchable sheets such as laminated sheets of the like.

[0181] The plurality of elastic members 33 of the back waist perimeter 30 are arranged side by side in the vertical direction between the skin-side sheet 31 and the non-skin-side sheet 32, and are fixed in a state of extension in the horizontal direction. In this way, the abdominal waist perimeter 20 and the back waist perimeter 30 each extend and contract in the horizontal direction, closely fitting the wearer's waist perimeter. Examples of elastic members 23 and 33 include elastic members made of rubber or elastic fibers.

[0182] The connecting part 5 is a so-called tag (grabbing part) member, which is used to form a waist periphery opening when the abdominal waist periphery 20 is cut off. Figure 17 is an enlarged view of part X in Figure 16. In this embodiment, the connecting part 5 has its base end (one side in the left-right direction as shown in Figure 16, etc.) fixed to the side of the abdominal waist periphery 20 that is closer to the center in the left-right direction, and its front end (the other side in the left-right direction as shown in Figure 16, etc.) has a locking part 51 that can be detachably engaged with the non-skin side of the abdominal waist periphery 20.

[0183] The connecting part 5 is a gripping part for the wearer or the person putting the diaper 1 on the wearer (hereinafter also referred to as "the wearer, etc.") to perform a gripping action. It is preferable that the connecting part 5 itself has strength to the point of not breaking. As the connecting part 5, for example, various films such as plastic film and nylon film, non-woven fabric, and films made by laminating non-woven fabric can be used. In this embodiment, the connecting part 5 of the diaper 1 is a sheet-like component made by overlapping three layers of non-woven fabric of the same size on both sides of the plastic film.

[0184] The engaging part 51, located on the skin-side of the connecting part 5, is a component that can be detachably engaged with the non-skin-side of the periphery of the ventral waist portion 20 (specifically, the engaging part 25). Examples of engaging parts 51 include, for instance, hook components of Velcro or adhesive materials such as adhesive sheets. In this embodiment, the engaging part 51 is generally rectangular, but it can also be any shape such as circular.

[0185] As shown in Figure 17, the connecting part 5 is fixed to the periphery of the abdominal waist 20 by the fixing part F1 and the auxiliary fixing part F2. In this embodiment, the fixing part F1 and the auxiliary fixing part F2 are welded parts formed by joining the connecting part 5 and the periphery of the abdominal waist 20 in the thickness direction by heat welding or ultrasonic welding. The connecting part 5 is mainly fixed to the periphery of the abdominal waist 20 by the fixing part F1, and the auxiliary fixing part F2 is the fixation caused by the auxiliary fixing part F1.

[0186] ===How to wear diaper 1=== Diapers can be worn in multiple ways. For example, a typical underwear-type diaper (see Figure 14) allows the wearer's feet to enter the leg openings LH from the waist opening BH, and pulls up the waist openings 20 and 30 to surround the wearer's waist, thus achieving the wearing state.

[0187] Furthermore, after wearing the disposable diaper in the form of underwear as described above, the abdominal waist perimeter 20 is cut off by cutting the guide section (described later), and the locking part 51 of the connecting part 5 is locked onto the abdominal waist perimeter 20, forming an opening around the waist, thereby enabling it to be worn. In this way, the locking position of the locking part 51 can be adjusted, making it easy to fit snugly around the wearer's waist.

[0188] In addition, the abdominal waist perimeter 20 can be cut off in advance by cutting off the guide part, so that one side in the left and right directions is in the form of a so-called adhesive diaper (without forming the leg perimeter opening LH), and the other side in the left and right directions is in the form of an underwear diaper (with forming the leg perimeter opening LH), which can also be worn.

[0189] First, the abdominal waist perimeter 20 is cut off by cutting the guide section, allowing the wearer's other foot (the wearer's right foot in diaper 1) to pass through the leg perimeter opening LH on the other side (in the form of an underwear-type diaper) in the left-right direction. Then, the diaper 1 is pulled up to the wearer's crotch area. After that, the engaging part 51 of the connecting part 5 is engaged with the abdominal waist perimeter 20 in a way that fits snugly around the wearer's waist, thereby forming a waist perimeter opening, thus achieving the wearing state.

[0190] By wearing it in this way, even for infants who have difficulty passing their legs through the leg openings LH on both sides of the panty-type disposable diaper, as long as the wearer can pass one leg through the leg opening LH, it can be easily put on by locking it with the connecting part 5 (locking part 51). Furthermore, when the wearer is putting on diaper 1, there may be situations where it is difficult to put on ordinary adhesive diapers (diapers with tape on both sides in the left and right directions) in places such as the toilet. However, by making one side of the left and right sides into a panty-type shape and the other side into a shape with the connecting part 5 (adhesive type), it is easier to put on and easier to adjust the tightness around the waist.

[0191] Furthermore, when removing the used diaper 1 from the body, the abdominal waist perimeter 20 is separated by cutting the guide section, and the diaper 1 is removed from one side of the wearer's body in the left-right direction. The leg on the other side is pulled out from the leg perimeter opening LH in the left-right direction, thereby removing the diaper 1 from the wearer's body.

[0192] ===Regarding the cutting of the 20mm perimeter of the ventral waist=== The cutting of the ventral waist periphery 20 will be explained using Figures 18 and 19. Figure 18 illustrates the separation of the ventral waist periphery 20 and the formation of the waist periphery opening. Figure 19 illustrates the cutting action of the ventral waist periphery 20. Figure 18 is a diagram illustrating the structure of the cross-section from the perspective of arrow AA in Figure 17. Note that Figures 18 and 19 are schematic diagrams, and dimensions may not be accurate.

[0193] Figure 18A shows the diaper 1 in the panty-like state shown in Figure 14, etc. That is, the abdominal waist perimeter 20 is not cut off, but rather forms a waist perimeter opening that connects the abdominal waist perimeter 20 and the back waist perimeter 30 through joints 2a and 2b. Figures 18B and 19A show the state shown in Figure 18A, with the front end of the joint 5 grasped and pulled towards the non-skin side.

[0194] Then, as shown in Figure 19A, grasp the waist perimeter 20 with one hand and the connecting part 5 with the other hand, and pull them apart to the left and right sides respectively. As shown in Figures 18C and 19B, the abdominal waist perimeter 20 will be cut along the cutting guide, separating one side from the other in the left and right directions. The "cutting guide" refers to the guide part when cutting at least a portion of the abdominal waist perimeter 20. In the diaper 1, the fixing part F1 that fixes the abdominal waist perimeter 20 and the connecting part 5 functions as the cutting guide. Specifically, as shown in Figure 19A, when the abdominal waist periphery 20 and the connecting part 5 are grasped and pulled apart to the left and right, the pulling force is first concentrated at the front end of the cutting guide (fixed part F1), i.e., the cutting guide starting point K. Then, the force is transmitted along the inclined part that slopes upward from the cutting guide starting point K and towards the base end, and the inclined part that slopes downward from the cutting guide starting point K and towards the base end. Then, the abdominal waist periphery 20 is cut off with the end CE on the other side of the fixed part F1 as the boundary, and the abdominal waist periphery 20 is separated into a part without the connecting part 5 and a part with the connecting part 5.

[0195] Then, as needed, as shown in Figure 18D, the engaging portion 51 of the connecting portion 5 is engaged with the engaged portion 25 of the abdominal waist perimeter portion 20, thereby forming the waist perimeter opening of the diaper 1. With the engaging portion 51 engaged with the engaged portion 25, it is possible to engage the engaging portion 51 with the engaged portion 25 such that one side portion of the separated abdominal waist perimeter portion overlaps the other side portion in the front-back direction (thickness direction), or it is possible to engage the engaging portion 51 with the engaged portion 25 such that one side portion of the separated abdominal waist perimeter portion overlaps the other side portion in the front-back direction (thickness direction). By adjusting the engaging position of the engaging portion 51, the size of the waist perimeter opening of the diaper 1 can be adjusted.

[0196] ===About Cutting the Guiding Section=== As described above, the diaper 1 has its left and right sides of the abdominal waist perimeter 20 and the back waist perimeter 30 joined by connecting portions 2a and 2b, respectively. Furthermore, the base of the connecting portion 5 is connected to the abdominal waist perimeter 20, and the front end of the connecting portion 5 has a locking portion 51 that can detachably engage with the non-skin side of the abdominal waist perimeter 20. Moreover, the abdominal waist perimeter 20 has a cutting guide portion. The cutting guide portion is located at a different position than the connecting portions 2a and 2b located at the left and right sides, and at least a portion of the abdominal waist perimeter 20 is a meltable portion F1.

[0197] Figure 20A illustrates the cutting guide portion of the diaper 1. Figure 20B illustrates the cutting guide portion for the tear line. Figure 20A is an enlarged view of part Y in Figure 18A, and Figure 20B is an enlarged view of the portion with the tear line on the abdominal waistband of a typical disposable diaper. The cutting guide portion of the diaper 1 is the part that melts the abdominal waistband 20.

[0198] As shown in Figure 17, if the periphery of the diaper waist 20 and the connecting part 5 are pulled apart to the left and right respectively, the periphery of the diaper waist 20 will be cut off with the end CE on the other side of the melting part F1 (cutting guide part) as the boundary.

[0199] As mentioned above, conventional cutting guides include tear lines. As shown in Figure 20B, the cutting guide formed by the tear line M often has a hole or fewer fibers in the skin-side waist perimeter where the tear line M is located, making it prone to tearing. Therefore, during the manufacturing or handling of disposable diapers, or when the wearer uses the diaper 1, there is a risk that the cutting guide might tear the abdominal waist perimeter against the wearer's will. In response, as shown in Figure 20A, the melting section F is a part that melts and fixes the fibers, without reducing the total amount of fibers. Therefore, by using the melting section F1 as a cutting guide, cutting can be performed when the purpose of cutting is to be achieved, and even when there is no intention to cut, the risk of tearing the abdominal waist perimeter 20 against the wearer's will by the cutting guide can be reduced.

[0200] Furthermore, the melting part F1 is located at a different position than the joining parts 2a and 2b, so the ventral waist periphery 20 and the dorsal waist periphery 30 are not joined at the melting part F1.

[0201] The melting part F1 of the diaper 1 is a fixing part F1 that fixes the periphery of the abdominal waist 20 and the connecting part 5 by welding them together. In this embodiment, the fixing part F1 is also referred to as the "melting part F1". That is to say, the melting part F1 is a part in which at least a portion of the periphery of the abdominal waist 20 is melted, and the periphery of the abdominal waist 20 and the connecting part 5 are fixed by welding (welding part) by melting at least a portion of the connecting part 5. Since the melting part F1, which functions as a cutting guide, is also the fixing part F1, it is not necessary to set the fixing part F1 and the melting part F1 separately. The diaper 1 can be manufactured by using a manufacturing process that simplifies the welding process.

[0202] The diaper 1 of this embodiment has a cutting guide (melting part F1, fixing part F1) on the abdominal waist perimeter 20. It is preferable that the cutting guide on the abdominal waist perimeter 20 is continuous from the upper end to the lower end of the abdominal waist perimeter 20 in a vertical direction. That is, it is preferable that the cutting guide, i.e., the melting part F1 (fixing part F1), is continuous from the upper end to the lower end of the abdominal waist perimeter 20. The cutting guide formed by the melting part F1, which melts the abdominal waist perimeter 20, reduces the risk of tearing the abdominal waist perimeter 20 against the wearer's intention. In the event that the wearer intends to cut the abdominal waist perimeter 20, the continuous cutting guide from the upper end to the lower end makes it easier to cut along the cutting guide than if the cutting guide is not continuous, thus facilitating complete separation of the abdominal waist perimeter 20.

[0203] Furthermore, it is preferable that the cutting guide portion has a portion that is inclined in the vertical direction, and it is preferable that the entire cutting guide portion is inclined in the vertical direction. Figure 21 is an enlarged view of the melting portion F1 and the auxiliary melting portion F2. In Figure 21, the end CE on the other side of the melting portion F1, which will become the boundary, is indicated by a thick line. The cutting guide portion of the diaper 1 in this embodiment has: inclined portions fa1 and fb1 that are inclined in the vertical direction from the end K on the foremost end side toward the base end side. By making the cutting guide portion inclined in the vertical direction, the risk of tearing of the abdominal waist perimeter 20 by the cutting guide portion against the wearer's intention can be reduced compared to the case where it is parallel in the vertical direction. Furthermore, the cutting guide portion that is inclined in the vertical direction is not limited to the straight inclined portions fa1 and fb1 as in the diaper 1, and can also be a portion with a curved portion.

[0204] As shown in Figure 21, the foremost end K of the cutting guide (melting part F1) is the cutting guide starting point K. The cutting guide starting point K is the part where force is most easily concentrated when applying force to the ventral waist periphery 20 and the connecting part 5 in order to cut the ventral waist periphery 20 with the cutting guide, and it is also the part where cutting is most easily initiated. Furthermore, it is preferable that the cutting guide has an upper inclined part fa1 and a lower inclined part fb1. The upper inclined part fa1 is an inclined part that slopes upwards and downwards from the foremost end K (cutting guide starting point) towards the base end, and the lower inclined part fb1 is an inclined part that slopes downwards and downwards from the foremost end K (cutting guide starting point) towards the base end. Therefore, when the wearer pulls the periphery of the abdominal waist 20 and the joint 5 apart, the force is first easily concentrated at the cutting guide point K, and the force is easily transmitted from the cutting guide point K to the upper inclined part fa1 and the lower inclined part fb1, thereby facilitating the cutting of the periphery of the abdominal waist 20.

[0205] Furthermore, among the angles formed by the upper inclined portion fa1 and the lower inclined portion fb1, it is preferable that the angle θ at the base end in the left-right direction is an obtuse angle (an angle larger than 90 degrees and smaller than 180 degrees). This reduces the risk of breakage of the ventral waist periphery 20 along the cutting guide portion from the cutting guide starting point compared to the case where θ is an acute angle. Even if partial breakage occurs, the risk of complete separation of the ventral waist periphery 20 can be reduced.

[0206] As shown in Figure 14, the diaper 1 in its panty-like state, before the abdominal waist perimeter 20 is cut off using the cutting guide (melting part F1), joins the abdominal waist perimeter 20 and the back waist perimeter 30 with joining parts 2a and 2b, thereby forming a waist perimeter opening (waist perimeter opening) BH. The waist perimeter opening BH is annular and runs in the left-right direction when viewed from the side of the abdominal waist perimeter 20. After cutting off the abdominal waist perimeter 20 with the cutting guide, the engaging part 51 of the joining part 5 is engaged with the non-skin side of the abdominal waist perimeter 20, thereby forming the waist perimeter opening BH. After the abdominal waist perimeter 20 is cut off by cutting the guide portion, the waist perimeter opening BH formed by the engaging portion 51 of the connecting portion 5 engaging with the non-skin side of the abdominal waist perimeter 20 is also ring-shaped, just like the waist perimeter opening B of the underwear-type diaper 1. The direction of the waist perimeter opening is along the left-right direction when viewed from the side of the abdominal waist perimeter 20.

[0207] The diaper 1 preferably has an auxiliary melting section F2 that is different from the melting section F1. A plurality of auxiliary melting sections F2 are arranged at intervals in the vertical direction to melt at least a portion of the periphery 20 of the ventral side. The plurality of auxiliary melting sections F2 are preferably located closer to the base end of the connecting section 5 than the cutting guide section (melting section F1) in the direction along the periphery opening of the waist.

[0208] As shown in Figures 17 and 21, the plurality of auxiliary melting parts F2 of the diaper 1 in this embodiment are arranged in a plurality of generally elliptical shapes at intervals along the cutting guide. Furthermore, the plurality of auxiliary melting parts F2 are located closer to the base end of the connecting part 5 than the melting part F1 in the direction of the opening around the waist (left-right direction), and in the diaper 1, they are located on one side of the left-right direction than the melting part F1.

[0209] The cutting guide, i.e. the melting part F1, guides the cutting of the abdominal waist periphery 20, and has a plurality of auxiliary melting parts F2, thereby reducing the risk of the cutting guide cutting the abdominal waist periphery 20 at the base end of the joint 5 at a position contrary to the intention of the wearer, etc.

[0210] Furthermore, the auxiliary melting part F2 of the diaper in this embodiment is also an auxiliary fixing part F2 for fixing the auxiliary connecting part 5 to the abdominal waist perimeter 20. The auxiliary fixing part F2 is also a welding part that welds and fixes the connecting part 5 to the abdominal waist perimeter 20. By making the auxiliary welding part F2 an auxiliary fixing part F2 that welds the connecting part 5 to the abdominal waist perimeter 20, the risk of cutting off the abdominal waist perimeter 20 against the wearer's intention is reduced, the fixing of the connecting part 5 to the abdominal waist perimeter 20 is strengthened, and the risk of the connecting part 5 being detached from the abdominal waist perimeter 20 is reduced.

[0211] Furthermore, as shown in Figure 17, it is preferable that at least a portion of the plurality of auxiliary melting parts F2 has a length f2w in the left-right direction that is longer than its length f2t in the up-down direction (f2w>f2t). Making the length f2w in the left-right direction of the auxiliary melting part F2 longer than its length f2t in the up-down direction reduces the risk of the skin-side waist periphery 20 breaking from the auxiliary melting part F2, compared to the case where the length f2w in the left-right direction of the auxiliary melting part F2 is shorter than its length f2t in the up-down direction.

[0212] Furthermore, the diaper 1 has a plurality of protruding melting portions protruding from the melting portion F1 toward the base end between the melting portion F1 and the auxiliary melting portion F2. The plurality of protruding melting portions are arranged at intervals in the vertical direction. This protruding melting portion is also a welding portion that welds the connecting portion 5 to the abdominal waist periphery 20. Similar to the auxiliary melting portion F2, it strengthens the fixation between the connecting portion 5 and the abdominal waist periphery 20 caused by the melting portion F1, and the interval arrangement of the protruding melting portions can reduce the risk of cutting off the abdominal waist periphery 20 starting from the protruding melting portion.

[0213] Furthermore, it is preferable that the configuration patterns of the melting part F1 and the joining part 2a are different. The melting part F1 and the joining part 2a can be configured in an appropriate way to suit their respective uses. The joining part 2a of the melting part F1 can be arbitrarily set in terms of shape, size, and configuration. In this embodiment of the diaper 1, as shown in Figure 21, the melting part F1 is a welded part formed by a straight upper inclined part fa1 and a lower inclined part fb1. The joining part 2a, as shown in Figure 17, consists of two rows: a plurality of elliptical welded parts arranged at intervals in the vertical direction, with the length in the horizontal direction being longer than the length in the vertical direction. The two rows of welded parts are staggered.

[0214] As shown in FIGS. 14 to 16, when viewing the disposable diaper 1 from the ventral waist peripheral portion 20 in the front-rear direction, it is preferable that the cut guide portion has a portion overlapping with the joint portion 5. In the disposable diaper 1 of the present embodiment, when viewing the disposable diaper 1 from the ventral waist peripheral portion 20 side, all of the cut guide portion of the ventral waist peripheral portion 20 is covered by the joint portion 5. The cut guide portion covered by the joint portion 5 can reduce the risk of being torn against the intention of the wearer compared to the exposed portion of the cut guide portion.

[0215] Moreover, in the ventral waist peripheral portion 20 where the joint portion 5 is fixed by the fixing portion F1, as described above, the cut guide portion is the melting portion F1 and also the fixing portion F1. As shown in FIG. 17, for the joint portion 5, the maximum length W5e in the left-right direction from the fixing portion F1 to the end portion on the front end side is preferably longer than the maximum length W5b in the left-right direction from the fixing portion F1 to the end portion on the base end side (W5e > W5b). Since the cut guide portion is the melting portion, it reduces the cutting of the ventral waist peripheral portion 20 against the intention of the wearer, etc. The melting portion F1, that is, the cut guide portion, is also the fixing portion F1. Therefore, when cutting the ventral waist peripheral portion 20 along the cut guide portion, when operating by grasping the front end portion of the joint portion 5, it is easy to grasp the front end portion of the joint portion 5, and it is easy for the wearer, etc. to cut the ventral waist peripheral portion 20.

[0216] In addition, as shown in FIG. 17 etc., the joint portion 5 is fixed by the fixing portion F1 on one side in the left-right direction of the ventral waist peripheral portion 20. In the left-right direction, the fixing portion F1 is provided on the other side than the joint portion 2a. The engaging portion 51 is provided on the other side than the fixing portion F1. In the left-right direction, the maximum length W5b from the fixing portion F1 to the end portion on the base end side of the joint portion 5 is preferably shorter than the maximum length W2a from the fixing portion F1 to the joint portion 2a (W5b < W2a). Compared with the case where the maximum length W in the left-right direction from the fixing portion F1 to the end portion on the base end side of the joint portion 5 is longer than the maximum length W2a from the fixing portion F1 to the joint portion 2a, it can reduce the risk of the ventral waist peripheral portion 20 being torn from the base end side of the joint portion 5 against the intention of the wearer, etc., or the fixing of the joint portion 5 and the ventral waist peripheral portion 20 being peeled off.

[0217] Furthermore, at least a portion of the fixing part F1 is a cutting guide part, and the connecting part 5 has a fixing means region J with a fixing means for forming the fixing part F1. It is preferable that the length TJ of the fixing means region J in the vertical direction is longer than the length Tf of the melting part F1 in the vertical direction (TJ>Tf). By making the length TJ of the fixing means region J in the vertical direction longer than the length Tf of the melting part F1 in the vertical direction, when cutting the periphery of the ventral waist 20 with the cutting guide part (the end CE of the melting part F1) as the boundary, it is easy to cut from the upper end to the lower end of the periphery of the ventral waist 20, and easy to completely separate it.

[0218] The fixing part F1 of the diaper 1 in this embodiment is a welding part that fuses the abdominal waist perimeter 20 with the connecting part 5. Located in the fixing means area J of the connecting part 5, it is a melting part that melts the connecting part 5. As shown in Figure 17, when viewed from the side of the abdominal waist perimeter 20, the fixing means area J forms the fixing part F1 in the portion overlapping with the abdominal waist perimeter 20. However, the portion J1 above the abdominal waist perimeter 20 and the portion J2 below the abdominal waist perimeter 20 are not fixed to the abdominal waist perimeter 20; only the portion of the connecting part 5 is melted. The fixing part F1 is continuous with the upper portion J1, and the fixing part F1 is continuous with the lower portion J2. Therefore, from the top to the bottom, part J1 is continuous with the melting part F1 (fixed part F1) which functions as a cutting guide and part J2. In this way, when cutting the abdominal waist periphery 20 with the cutting guide (the end CE of the fixed part F1) as the boundary, it is easy to cut from the upper end to the lower end of the abdominal waist periphery 20.

[0219] As shown in Figure 22, the abdominal waist perimeter 20 of the diaper 1 has a telescopic member 23 that extends and retracts in the left and right directions, and has a telescopic region S that extends and retracts in the left and right directions and a non-telescopic region N that does not extend and retract in the left and right directions. The telescopic region S of the abdominal waist perimeter 20 refers to the area where the telescopic member 23 can extend and retract. Specifically, in the left and right direction, the area between the central part and the side end from the central part to the joint 5 is the non-telescopic region N. The telescopic region S has, in the left and right direction, a one-sided telescopic region Sa provided on one side and a other-sided telescopic region Sb provided on the other side. The area from the joint 2a on one side to the side end of the joint 5 on one side is the one-sided telescopic region Sa, and the area from the joint 2b on the other side to the central part is the other-sided telescopic region Sb.

[0220] The connecting part 5 is fixed to the abdominal waist periphery 20 by the fixing part F1. When the engaging part 51 can be detachably engaged with the non-skin side of the abdominal waist periphery 20, it is preferable that, in the left-right direction, there is a one-sided stretchable area Sa between the connecting part 2a and the fixing part F1, which stretches in the left-right direction, and a one-sided non-stretchable area Na between the connecting part 2a and the fixing part F1, which does not stretch in the left-right direction. In Figures 17 and 22, the one-sided non-stretchable area Na is represented by a dotted area. Then, regarding the one-sided stretchable area Sa (stretchable area) and the one-sided non-stretchable area Na of the abdominal waist periphery 20, it is preferable that, in the left-right direction, the one-sided stretchable area Sa is provided in a manner that is adjacent to the other side of the connecting part 2a, and the one-sided non-stretchable area Na is provided in a manner that is adjacent to the fixing part F1 from one side. Specifically, in this embodiment, the stretchable area Sa on one side of the diaper 1 is adjacent to the joint 2a located on one side in the left-right direction from the other side in the left-right direction (left side of FIG. 17). Furthermore, the non-stretchable area Na on one side is adjacent to the fixing part F1 located on the other side in the left-right direction, which is further away from the joint 2a from one side in the left-right direction (right side of FIG. 17).

[0221] In this way, the non-stretchable area Na on one side is adjacent to the cutting guide, i.e. the melting part F1, i.e. the fixing part F1, from one side in the left and right direction, so that the cutting guide on the ventral waist periphery 20 can be easily cut. And by the stretchable area Sa on one side adjacent to the joint 2a from the other side in the left and right direction, the waist periphery opening BH formed by the joint 5 can more easily become the size that fits the wearer's body closely.

[0222] Furthermore, regarding the joint 5, which has the fixing part F1 located on the side further away from the joint 2a in the left-right direction, and the engaging part 51 located on the side further away from the fixing part F1, it has a non-fixed part D located on the side further away from both the fixing part F1 and the joint 2a. As shown in Figure 17, when viewing the diaper 1 from the abdominal waist perimeter 20 side in the front-back direction, it is preferable that one side of the non-stretchable area Na overlaps with the non-fixed part D. By using the one side of the stretchable area Na, the force that causes the joint 5 to move is prevented from being buffered by the stretching, and the force that causes the joint 5 to move can be easily and directly applied to the joint 5. On the other hand, when viewed from the side of the waist perimeter 20 of the diaper 1, the non-stretchable area Na on one side overlaps with the non-fixed part D, thereby making the non-fixed part D cover at least a part of the non-stretchable area Na on one side. This can increase the rigidity of the part between the joint 2a and the fixed part F1 in the left and right directions, and reduce the risk of damage to the part between the joint 2a and the fixed part F1.

[0223] In the diaper 1, the connecting part 5 is fixed to the abdominal waist perimeter 20 by the fixing part F1. The cutting guide part, i.e., the melting part F1, i.e., the fixing part F1, is the welding part that welds the abdominal waist perimeter 20 to the connecting part. The abdominal waist perimeter 20 has a stretchable area (one side stretchable area) S that stretches in the left and right direction. The back waist perimeter 30 has a stretchable area (the other side stretchable area) S30 that stretches in the left and right direction (Figure 16, etc.). The stretchable area S30 of the back waist perimeter 30 is the area where the stretchable member 33 can stretch in the left and right direction, which refers to the area from the side end of the connecting part 2a in the left and right direction to the side end of the connecting part 2b in the left and right direction.

[0224] In the panty-type diaper 1, it is preferable that the elastic area S of the abdominal waist perimeter 20 and the elastic area S30 of the back waist perimeter 30 are connected through joints 2a and 2b. That is, on one side of the diaper 1 in the left-right direction, it is preferable that the elastic area Sa of the abdominal waist perimeter 20 and the elastic area S30 of the back waist perimeter 30 are connected through joint 2a. On the other side in the left-right direction, the elastic area Sb of the other side of the abdominal waist perimeter 20 is connected through joint 2b. On the other hand, the connecting part 5 includes: a non-stretchable region on one side (base end side non-stretchable region) Na that does not stretch to the left or right on the base end side, and a non-stretchable region on the other side (front end side non-stretchable region) Nb that does not stretch to the left or right on the front end side, and it is preferable that the non-stretchable region Na on one side and the non-stretchable region Nb on the other side are connected by the fixing part F1.

[0225] Therefore, by means of the expansion and contraction of the expansion and contraction regions Sa and S30 on one side adjacent to the joints 2a and 2b, and the expansion and contraction regions Sb and S30 on the other side, the force applied to the joints 2a and 2b can be buffered, thereby reducing the risk of damage to the joints 2a and 2b due to the force applied to them. On the other hand, regarding the joint 5, by means of the non-expansion and contraction regions Na and Nb adjacent to the fixed part F1, the force that causes the joint 5 to move can be directly applied to the joint 5, thus making it easy to cut off the ventral waist periphery 20 where the joint 5 is used.

[0226] Furthermore, in its natural state, the diaper 1 is preferably positioned such that the connecting portion 5 located on the abdominal waist perimeter 20 is folded back from the rear to the front on one side in the left-right direction. Moreover, when viewing the diaper 1 from the abdominal waist perimeter 20 side in the left-right direction, as shown in Figure 15, the base of the connecting portion 5 is preferably located at the rear of the diaper 1, and the front of the connecting portion 5 is preferably located at the frontmost side of the diaper 1. In this way, at least a portion of the front and rear sides of the waist perimeters 20 and 30 of the diaper 1 in its natural state, located on one side in the left-right direction, is covered by the connecting portion 5. Therefore, the portion of the waist perimeters 20 and 30 covered by the connecting portion 5 can reduce the risk of tearing against the wearer's will.

[0227] ===Other Implementation Forms=== While the embodiments of the present invention have been described above, these embodiments are intended to facilitate understanding of the invention and are not intended to limit or interpret the invention. Furthermore, the present invention can be modified or improved without departing from its spirit, and the present invention should therefore include such equivalents.

[0228] In the above embodiment, the melting part F1 and the auxiliary melting part F2 are fixing parts F1 and F2 that fix the periphery of the ventral waist 20 to the joint part 5 by welding, but are not limited to this. The melting part F1 may be a part that only melts the periphery of the ventral waist 20. Similarly, the auxiliary melting part F2 may be a part that only melts the periphery of the ventral waist 20.

[0229] In the above embodiment, the connecting portion 5 of the diaper 1 and the abdominal waist perimeter 20 are different components, and the connecting portion 5 and the abdominal waist perimeter 20 are fixed by the fixing portion F1, but it is not limited to this. The connecting portion 5 can be connected to the abdominal waist perimeter 20, for example, it can be made of the same component that makes the abdominal waist perimeter 20 continuous with the connecting portion, and it can also be a structure without a fixing portion.

[0230] In the above embodiment, although the connecting part 5 is connected (fixed) to the ventral waist periphery 20, it is not limited to this. The connecting part 5 can also be connected to the dorsal waist periphery 30. In this case, similar to the ventral waist periphery 20, the connecting part of a different component from the dorsal waist periphery 30 can be fixed by the fixing part F1, and it can be constructed by the same component that makes the dorsal waist periphery 30 continuous with the connecting part, and it can also be constructed without the fixing part F1. Furthermore, the fixing of the connecting part 5 to the waist periphery 20 and 30 (fixing part F1) is not limited to the joint caused by welding, and the joint can also be performed by a known method such as an adhesive.

[0231] In the above embodiment, the fixing part F1 is used to fix the connecting part 5 and the abdominal waist periphery 20, so that the engaging part 51 engages with the non-skin side of the abdominal waist periphery 20, but it is not limited to this. The fixing part F1 can also be used to fix the connecting part 5 and the abdominal waist periphery 20, so that the engaging part 51 engages with the non-skin side of the dorsal waist periphery 30. Furthermore, the fixing part F1 can also be used to fix the connecting part 5 and the dorsal waist periphery 30, so that the engaging part 51 engages with the non-skin side of either the abdominal waist periphery 20 or the dorsal waist periphery 30.

[0232] Furthermore, in the above-described embodiment, on one side of the diaper 1 in the left-right direction, there is a connecting part 5 that is fixed by a cutting guide, i.e., a fixing part F1, and on the other side in the left-right direction, a connecting part 2b is used to connect the waist perimeter portions 20 and 30, and the connecting part 5 is not present, but it is not limited to this. On one side of the diaper 1 in the left-right direction, there is a connecting part 5 that is fixed by a cutting guide, i.e., a fixing part F1, and the waist perimeter portions 20 and 30 are connected by a connecting part 2b on the other side in the left-right direction. It is also possible to provide a cutting guide, i.e., a melting part, or to fix the connecting part with a fixing part F1 that is a melting part.

[0233] In the above embodiment, the melting portion F1 (fixed portion F1) extends continuously from the upper end to the lower end of the ventral waist periphery 20, and all of the melting portion F1 (fixed portion F1) is a cutting guide portion, but it is not limited to this. The melting portion F1 (fixed portion F1) may be discontinuous, the melting portion F1 (fixed portion F1) may not be provided at the upper or lower end of the ventral waist periphery 20, and a part of the melting portion F1 (fixed portion F1) may be a cutting guide portion. For example, the melting portion F1 (fixed portion F1) may be discontinuous, and the straight melting portion F1 (fixed portion F1) may branch along the way, so that a part of the melting portion F1 (fixed portion F1) constitutes a cutting guide portion.

[0234] In the above embodiment, the cutting guide portion has an upper inclined portion fa1 that slopes upward from the cutting guide starting point K and towards the base end, and a lower inclined portion fb1 that slopes downward from the cutting guide starting point K and towards the base end, but is not limited to this. The cutting guide portion may also have a shape along the vertical direction, or a shape in which the cutting guide starting point K is located at the upper or lower end of the ventral waist periphery 20 and has an inclined portion. Furthermore, the cutting guide portion may also have an inclined portion that slopes downward from the upper end of the ventral waist periphery 20 and towards the front end, and an inclined portion that slopes upward from the lower end of the ventral waist periphery 20 and towards the front end.

[0235] In the above embodiment, regarding the cutting guide (melting part F1, fixing part F1), the angle θ between the upper inclined part fa1 and the lower inclined part fb1 on the base end side of the connecting part 5 is an obtuse angle, but it is not limited to this. Regarding the cutting guide (melting part F1, fixing part F1), the angle θ between the upper inclined part fa1 and the lower inclined part fb1 on the base end side of the connecting part 5 can also be an acute angle. By using the melting part F1 as the cutting guide, the risk of tearing contrary to the intention, such as when a tear line is provided, is reduced. Making the angle θ an acute angle makes it easier to transmit the high slope of the upper inclined part fa1 and the lower inclined part fb1 in the vertical direction compared to the case where the angle θ is an obtuse angle, thus facilitating the cutting of the cutting guide.

[0236] Furthermore, as described above, the diaper 1 is held by grasping the perimeter of the abdominal waist 20 with one hand and the connecting part 5 with the other hand, and pulled outwards to the left and right respectively. This allows the perimeter of the abdominal waist 20 to be cut along the cutting guide. In Figures 19A and 19B, the hand grasping the perimeter of the abdominal waist 20 and the hand grasping the connecting part 5 are pulled horizontally (parallel to the width direction of the diaper 1). This concentrates the force at the cutting guide point K located at the foremost end of the connecting part 5, and the perimeter of the abdominal waist 20 is cut from the cutting guide point K along the cutting guide (fixed part F1). However, this method is not limited to this type of cutting. For example, the connecting part 5 can be pulled out with the front end facing downwards or upwards, and the perimeter of the abdominal waist 20 can be cut by pulling the connecting part 5 in any direction.

[0237] Figure 23 is a diagram illustrating a modified example of the cutting guide portion. Figure 23 shows a modified example of part X of the diaper 1 shown in Figure 16. In the part that is common to the structure of the diaper 1 described above, the symbols are the same and the detailed description of the basic structure of the diaper 1 is omitted. The main focus is on the structure of the cutting guide portion (fixed part F1), which is different from the diaper 1 described above.

[0238] As shown in Figure 23, the fixing part F1, which secures the periphery of the ventral waist 20 to the connecting part 5, functions as a cutting guide. As shown in Figure 23, the end CE on the other side (front end side) of the fixing part F1 may also have a concave-convex portion. In the fixing part F1 shown in Figure 23, the end CE on the other side has a recessed portion fx that is recessed to the left or right (base end side) and a protruding portion fy that is protruding to the left or right (front end side), alternately arranged throughout the entire area of ​​the fixing part F1 in the vertical direction. With this recessed portion fx and protruding portion fy (convex-convex portion), it is easy to set the cutting guide starting point K, and it is easy to cut the periphery of the ventral waist 20 from the cutting guide point K using the cutting guide (fixing part F1).

[0239] In the cutting guide portion (fixed portion F1) shown in Figure 23, the concave portion fx and the convex portion fy (concave-convex portion) are such that the boundary between the concave portion fx and the convex portion fy is the cutting guide starting point K. Since the fixed portion F1 shown in Figure 23 has a plurality of concave portions fx and a plurality of convex portions fy, the cutting guide portion has a plurality of cutting guide starting points K. For example, when a wearer grasps the perimeter of the waist area 20 with one hand and the connecting portion 5 with the other hand, and pulls the connecting portion apart in the direction of arrow PLA in Figure 23 (towards one side (base end side) and downwards), the boundary between the concave portion fx and the convex portion fy in the fixed portion F1 of the connecting portion 5, located above the center in the vertical direction, becomes the cutting guide starting point K, making it easier to cut using the cutting guide portion. Furthermore, when a wearer grasps the periphery 20 of the waist area with one hand and the joint 5 with the other, and pulls the joint 5 in the direction of arrow PLb in Figure 23 (towards one of the left and right directions (the base end side) and the upper side), the boundary between the concave portion fx and the convex portion fy in the fixing portion F1 of the joint 5, which is located in the vertical direction below the center, becomes the cutting guide point K, making it easy to cut with the cutting guide. The cutting guide (fixing portion F1) shown in Figure 23 has a plurality of concave portions fx and convex portions fy alternately provided throughout the vertical direction of the fixing portion F1, and a plurality of cutting guide points K are provided. Therefore, the direction of pulling the joint is not limited to directions PLA and PLb, and the cutting guide point K corresponding to the direction of pulling the joint 5 caused by the wearer is used as the cutting point, making it easy to cut the periphery 20 of the waist area.

[0240] The cutting guide (fixed part F1) can also have the structure shown in Figures 24A and 24B. Figure 24 is a diagram illustrating a modified example of the cutting guide. In Figures 24A and 24B, only the shape of the fixed part F1 (cutting guide) is shown. As shown in Figure 24A, the cutting guide (fixed part F1) may also have: a protrusion fy protruding to the other side (front end side) in the left-right direction, and a recess fx located on the side further left-right in the left-right direction than the protrusion fy (base end side). Similarly, as shown in Figure 24B, the cutting guide (fixed part F1) may also have: a recess fx recessed to the one side (base end side) in the left-right direction, and a protrusion fy protruding to the other side (front end side) in the left-right direction. In the fixed part F1 shown in Figures 24A and 24B, a plurality of recesses fx and a plurality of protrusions fy are alternately provided in the vertical direction throughout the entire area of ​​the fixed part F1. The cutting guide starting point K in Figures 24A and 24B is the vertex of the front end side of each convex part fy.

[0241] The cutting guide portion (fixed portion F1) shown in Figures 24A and 24B is also used when the wearer, etc., grasps the perimeter of the waist area 20 with one hand and the joint portion 5 with the other hand, and pulls the joint portion apart in the direction of arrow PLA in Figures 24A and 24B (towards the left-right direction (base end side) and downwards). In this case, the portion (upper inclined portion fa1) located above the center in the vertical direction of the fixed portion F1 of the joint portion 5 becomes the cutting guide starting point K. Furthermore, when the wearer, etc., grasps the perimeter of the waist area 20 with one hand and the joint portion 5 with the other hand, and pulls the joint portion apart in the direction of arrow PLb in Figures 24A and 24B (towards the left-right direction (base end side) and upwards), the portion (lower inclined portion fb1) located below the center in the vertical direction of the fixed portion F1 of the joint portion 5 becomes the cutting guide starting point K. The fixing part F1 shown in Figures 24A and 24B is similar to the fixing part F1 shown in Figure 23. It has a plurality of recesses fx and convex parts fy that are alternately provided throughout the entire vertical direction of the fixing part F1, and a plurality of cutting guide points K are provided. Therefore, the direction of pulling open the joint is not limited to the directions PLA and PLb. The cutting guide point K corresponding to the pulling open direction of the joint 5 caused by the wearer, etc., will be used as the cutting point, and the periphery of the abdominal waist 20 can be easily cut off.

[0242] In the above embodiment, although the diaper with the abdominal waist perimeter 20 and the dorsal waist perimeter 30 being separate components is exemplified, a crotch portion is provided between the abdominal waist perimeter 20 and the dorsal waist perimeter 30, so that the abdominal waist perimeter 20 and the dorsal waist perimeter 30 can be a continuous single component.

[0243] 1: Disposable diapers, absorbent items 2a, 2b: Joint 5: Joint 10: Absorbent Body 11: Absorber 11A: Absorbent Core 12: Surface flakes 13: Second thin slice 14: Side sheet 15: Back layer sheet 16: Outer Sheet 17: Leg perimeter telescopic components 18: Leak-proof expansion joint 20: Peripheral area of ​​the flank and waist (peripheral area of ​​one side of the waist) 21: Skin-side thin sheet (waist area thin sheet component) 22: Non-skin side sheet (waist perimeter sheet component) 23: Expansion Joint 25: The part that was stuck 30: Peripheral area of ​​the back waist (peripheral area of ​​the other side waist) 31: Skin side sheet 32: Non-skin side thin film 33: Expansion Joint 51: Card-connecting section BH: Waist perimeter opening (waist perimeter opening) LH: Opening around the leg F1: Fixed part, melting part F2: Auxiliary fixing part, auxiliary melting part fa1: Inclined part, upper inclined part fb1: Inclined part, lower inclined part K: Cut off the guiding origin S: Expansion / retraction area (one-sided expansion / retraction area) S30: Telescopic area (telescopic area on the other side) Sa: One-sided expansion / contraction area (expansion / contraction area) Sb: The other side's expansion / contraction area N: Non-expandable area

Claims

1. An absorbent article having mutually orthogonal vertical, horizontal, and front-back directions, and having a waist periphery portion having a waist periphery portion on one side and a waist periphery portion on the other side, characterized in that the ends of the aforementioned waist periphery portion on one side and the aforementioned waist periphery portion on the other side in the aforementioned horizontal direction are joined by a joint portion, having a joint portion, the base end of the aforementioned joint portion being fixed to the aforementioned waist periphery portion by a fixing portion, the front end of the aforementioned joint portion having a locking portion that can be detachably engaged with the non-skin side of the aforementioned waist periphery portion, and at least a portion of the aforementioned fixing portion also being a cutting guide portion when cutting off at least a portion of the aforementioned waist periphery portion.

2. The absorbent article as described in claim 1, wherein, When viewing the absorbent article from the side of the waist periphery in the aforementioned front-rear direction, in the adjacent area between the aforementioned front end of the aforementioned joint and the aforementioned fixing part, the minimum weight per unit area of ​​the aforementioned joint is greater than the maximum weight per unit area of ​​the aforementioned waist periphery.

3. An absorbent article as described in claim 1 or 2, wherein, The aforementioned waist periphery is formed by one or more waist periphery sheet members, and the aforementioned joint is formed by one or more joint sheet members. When viewing the aforementioned absorbent article from the waist periphery side in the aforementioned front-rear direction, in the adjacent area from the aforementioned front end side of the aforementioned joint to the aforementioned fixing part, the minimum weight per unit area of ​​the aforementioned one or more joint sheet members is greater than the maximum weight per unit area of ​​the aforementioned one or more waist periphery sheet members.

4. The absorbent article as described in claim 1, wherein, In the aforementioned cutting guide portion, the end of the aforementioned connecting portion closest to the aforementioned front end is the cutting guide starting point. The aforementioned cutting guide portion has an inclined portion that extends from the end closest to the aforementioned front end towards the aforementioned base end and is inclined in the aforementioned vertical direction.

5. The absorbent article as described in claim 1, wherein, In the aforementioned cutting guide portion, the end of the aforementioned connecting portion closest to the aforementioned front end is the cutting guide starting point. The aforementioned cutting guide portion has: an upper inclined portion that slopes upward from the end closest to the aforementioned front end and towards the aforementioned base end, and a lower inclined portion that slopes downward from the end closest to the aforementioned front end and towards the aforementioned base end.

6. The absorbent article as described in claim 5, wherein, Among the angles between the aforementioned upper inclined portion and the aforementioned lower inclined portion, the angle between the aforementioned base end portion in the left and right directions is an obtuse angle.

7. The absorbent article as described in claim 5, wherein, Among the angles between the aforementioned upper inclined portion and the aforementioned lower inclined portion, the angle between the aforementioned base end portion in the left and right directions is an acute angle.

8. An absorbent article as described in any one of claims 4 to 7, wherein, The absorbent core has an absorbent core that absorbs liquid. In the aforementioned left and right directions, the aforementioned cut-off guide starting point is located on the side further away from the aforementioned absorbent core.

9. The absorbent article as described in claim 4, wherein, In the aforementioned vertical direction, the aforementioned cutting guide starting point overlaps with the aforementioned locking part.

10. The absorbent article as described in claim 1, wherein, In the aforementioned vertical direction, the aforementioned cutting guide extends from the upper end of the aforementioned waist periphery where the aforementioned fixing part is located to the lower end.

11. The absorbent article as described in claim 1, wherein, It has an auxiliary fixing part that assists in fixing the aforementioned connecting part to the aforementioned waist periphery where the aforementioned fixing part is provided. The aforementioned auxiliary fixing part is arranged at intervals in the aforementioned vertical direction on the aforementioned base end side of the aforementioned connecting part, which is further back than the aforementioned cutting guide part.

12. The absorbent article as described in claim 1, wherein, In the aforementioned joint, the maximum length in the left-right direction from the aforementioned fixing part to the aforementioned front end side is longer than the maximum length in the left-right direction from the aforementioned fixing part to the aforementioned base end side.

13. The absorbent article as described in claim 1, wherein, The aforementioned cutting guide portion is a welding portion that welds the aforementioned waist periphery portion to the aforementioned joint portion.

14. The absorbent article as described in claim 13, wherein, In the aforementioned front-back direction, among the aforementioned waist perimeter portion, the melting point of the component closest to the aforementioned joint in the aforementioned front-back direction is lower than the melting point of the component closest to the aforementioned waist perimeter portion in the aforementioned joint in the aforementioned front-back direction.

15. The absorbent article as described in claim 1, wherein, The device has an absorbent core that absorbs liquid. The aforementioned connecting portion is fixed to the periphery of the aforementioned side waist portion by the aforementioned fixing portion. In the aforementioned left-right direction, the aforementioned cutting guide portion is provided between the aforementioned connecting portion and the aforementioned absorbent core.

16. The absorbent article as described in claim 1, wherein, All of the aforementioned fixing parts are the aforementioned cutting guide parts.

17. The absorbent article as described in claim 1, wherein, In the aforementioned waist periphery where the aforementioned fixing part is provided, the portion at a predetermined distance from the aforementioned cutting guide part toward the aforementioned connecting part to the aforementioned front end side is a non-stretchable area in which the aforementioned waist periphery will not stretch or extend in the aforementioned left and right directions.

18. The absorbent article as described in claim 1, wherein, Adhesive is applied to the portion of the waist periphery where the aforementioned fixing part is provided, at a predetermined distance from the aforementioned cutting guide part toward the aforementioned connecting part to the aforementioned front end side.

19. An absorbent article having mutually orthogonal vertical, horizontal, and front-back directions, and having a waist periphery portion comprising a side waist periphery portion and a side waist periphery portion, characterized in that: the two end portions of the aforementioned one-sided waist periphery portion and the aforementioned other-sided waist periphery portion are respectively joined by a joint portion, having a joint portion; the base end portion of the aforementioned joint portion is connected to the aforementioned waist periphery portion; the front end portion of the aforementioned joint portion has a locking portion that can be detachably engaged with a non-skin side of the aforementioned one-sided waist periphery portion; the aforementioned waist periphery portion has a cutting guide portion for cutting off at least a portion of the aforementioned waist periphery portion; the aforementioned cutting guide portion is provided at a different position than the aforementioned joint portions provided at the aforementioned two end portions in the horizontal direction; the aforementioned cutting guide portion is a melting portion for melting at least a portion of the aforementioned waist periphery portion; the base end portion of the aforementioned joint portion is fixed to the aforementioned waist periphery portion by a fixing portion; at least a portion of the aforementioned fixing portion is also the aforementioned cutting guide portion. In the aforementioned joint, the maximum length in the left-right direction from the aforementioned fixing part to the aforementioned front end side is longer than the maximum length in the left-right direction from the aforementioned fixing part to the aforementioned base end side.

20. The absorbent article as described in claim 19, wherein, The aforementioned waist periphery has a plurality of auxiliary melting portions. The aforementioned waist periphery, after being cut by the aforementioned cutting guide portion, is configured to engage the aforementioned engaging portion with the non-skin side of the aforementioned one-sided waist periphery, thereby forming a waist periphery opening. The aforementioned plurality of auxiliary melting portions are located at a position closer to the base end of the aforementioned connecting portion than the aforementioned cutting guide portion along the direction of the aforementioned waist periphery opening. The aforementioned plurality of auxiliary melting portions melt at least a portion of the aforementioned waist periphery and are arranged at intervals in the aforementioned vertical direction.

21. The absorbent article as described in claim 20, wherein, At least a portion of the aforementioned plurality of auxiliary melting parts has a length in the left-right direction that is longer than its length in the up-down direction.

22. An absorbent article as described in any one of claims 19 to 21, wherein, In the aforementioned vertical direction, the aforementioned cutting guide extends from the upper end of the aforementioned waist periphery where the aforementioned cutting guide is located to the lower end.

23. The absorbent article as described in claim 19, wherein, The aforementioned cutting guide is inclined in the aforementioned vertical direction.

24. The absorbent article as described in claim 19, wherein, In the aforementioned cutting guide portion, the end of the aforementioned connecting portion closest to the aforementioned front end is the cutting guide starting point. The aforementioned cutting guide portion has: an upper inclined portion that slopes upward from the end closest to the aforementioned front end and towards the aforementioned base end, and a lower inclined portion that slopes downward from the end closest to the aforementioned front end and towards the aforementioned base end. Among the angles between the aforementioned upper inclined portion and the aforementioned lower inclined portion, the angle of the aforementioned base end in the left-right direction is an obtuse angle.

25. The absorbent article as described in claim 19, wherein, In the aforementioned cutting guide portion, the end of the aforementioned connecting portion closest to the aforementioned front end is the cutting guide starting point. The aforementioned cutting guide portion has: an upper inclined portion that slopes upward from the end closest to the aforementioned front end and towards the aforementioned base end, and a lower inclined portion that slopes downward from the end closest to the aforementioned front end and towards the aforementioned base end. Among the angles between the aforementioned upper inclined portion and the aforementioned lower inclined portion, the angle of the aforementioned base end in the left-right direction is an acute angle.

26. The absorbent article as described in claim 19, wherein, When viewing the absorbent article from the waist periphery side where the aforementioned cutting guide is provided in the aforementioned front-back direction, the aforementioned cutting guide has a portion that overlaps with the aforementioned joint portion.

27. The absorbent article as described in claim 26, wherein, The aforementioned fixing part is provided on the periphery of the aforementioned side waist portion. The aforementioned fixing part is provided on the other side further than the aforementioned joint portion in the aforementioned left-right direction. The aforementioned engaging part is provided on the other side further than the aforementioned fixing part in the aforementioned left-right direction. In the aforementioned left-right direction, the maximum length from the aforementioned fixing part to the end of the aforementioned joint portion at the aforementioned base end is shorter than the maximum length from the aforementioned fixing part to the aforementioned joint portion.

28. An absorbent article having mutually orthogonal vertical, horizontal, and front-back directions, and having a waist periphery portion having a side waist periphery portion and a side waist periphery portion, characterized in that: the two end portions of the aforementioned one side waist periphery portion and the aforementioned other side waist periphery portion are respectively joined by a joint portion, having a joint portion; the base end portion of the aforementioned joint portion is connected to the aforementioned waist periphery portion; the front end portion of the aforementioned joint portion has a locking portion that can be detachably engaged with a non-skin side of the aforementioned one side waist periphery portion; the aforementioned waist periphery portion has a cutting guide portion when cutting off at least a portion of the aforementioned waist periphery portion; the aforementioned cutting guide portion is provided at a different position than the aforementioned joint portion provided at the aforementioned two end portions in the horizontal direction; the aforementioned cutting guide portion is a melting portion that melts at least a portion of the aforementioned waist periphery portion; the aforementioned joint portion is fixed to the aforementioned waist periphery portion by a fixing portion; the aforementioned joint portion has a fixing means area having a fixing means for forming the aforementioned fixing portion. At least a portion of the aforementioned fixing part is also the aforementioned cutting guide part, and the aforementioned fixing means region is longer in the vertical direction than the aforementioned melting part in the vertical direction.

29. The absorbent article as described in claim 19, wherein, In its natural state, the aforementioned joint portion, on the aforementioned side in the aforementioned left-right direction, folds back from the rear side in the aforementioned front-back direction toward the front side in the aforementioned front-back direction. When the aforementioned absorbent article is viewed from the waist periphery side in the aforementioned front-back direction, the aforementioned base end of the aforementioned joint portion is located at the rearmost side of the aforementioned absorbent article, and the aforementioned front end of the aforementioned joint portion is located at the frontmost side of the aforementioned absorbent article.

30. The absorbent article as described in claim 19, wherein, The aforementioned joint is fixed to the periphery of the aforementioned one side waist by a fixing part. The aforementioned engaging part can be detachably engaged with the non-skin side of the periphery of the aforementioned one side waist. The periphery of the aforementioned one side waist has a telescopic region that extends and retracts in the aforementioned left and right directions and a non-telescopic region that does not extend and retract in the aforementioned left and right directions between the aforementioned joint and the aforementioned fixing part. The aforementioned telescopic region is adjacent to the aforementioned joint from the other side. The aforementioned non-telescopic region is adjacent to the aforementioned fixing part from the aforementioned one side.

31. The absorbent article as described in claim 30, wherein, In the aforementioned left-right direction, the aforementioned fixing part is provided on the side further away from the aforementioned joint part, the aforementioned engaging part is provided on the side further away from the aforementioned fixing part, the aforementioned joint part has a non-fixed part that is not fixed to the aforementioned side waist periphery provided on the side further away from the aforementioned fixing part and the side further away from the aforementioned joint part, when the aforementioned absorbent article is viewed from the side waist periphery side in the aforementioned front-back direction, the aforementioned non-stretchable area overlaps with the aforementioned non-fixed part.

32. An absorbent article having mutually orthogonal vertical, horizontal, and front-back directions, and having a waist periphery portion comprising a side waist periphery portion and a side waist periphery portion, characterized in that: the two end portions of the aforementioned one-sided waist periphery portion and the aforementioned other-sided waist periphery portion are respectively joined by a joint portion, having a joint portion; the base end portion of the aforementioned joint portion is connected to the aforementioned waist periphery portion; the front end portion of the aforementioned joint portion has a locking portion that can be detachably engaged with a non-skin side of the aforementioned one-sided waist periphery portion; the aforementioned waist periphery portion has a cutting guide portion for cutting off at least a portion of the aforementioned waist periphery portion; the aforementioned cutting guide portion is provided at a different position than the aforementioned joint portions provided at the aforementioned two end portions in the horizontal direction; the aforementioned cutting guide portion is a melting portion for melting at least a portion of the aforementioned waist periphery portion; the aforementioned joint portion is fixed to the aforementioned waist periphery portion by a fixing portion; the aforementioned fixing portion is a welding portion for fusing the aforementioned waist periphery portion and the aforementioned joint portion. At least a portion of the aforementioned fixing part is also the aforementioned cutting guide part. The aforementioned one-sided waist periphery has a one-sided telescopic region that telescopically extends in the aforementioned left and right direction. The aforementioned other-sided waist periphery has a other-sided telescopic region that telescopically extends in the aforementioned left and right direction. The aforementioned one-sided telescopic region and the aforementioned other-sided telescopic region are connected through the aforementioned joint part. The aforementioned joint part has: a base end side non-telescopic region that does not telescopically extend in the aforementioned left and right direction on the aforementioned base end side, and a front end side non-telescopic region that does not telescopically extend in the aforementioned left and right direction on the aforementioned front end side. The aforementioned base end side non-telescopic region and the aforementioned front end side non-telescopic region are connected through the aforementioned fixing part.

33. The absorbent article as described in claim 19, wherein, The aforementioned melting portion has a different configuration than the aforementioned joining portion.

34. An absorbent article as described in claim 1 or 19, wherein, The aforementioned joint has a concave-convex portion at the front end side.

Images