RU169501U1 - DISPOSABLE NAPPER TYPE TYPE - Google Patents

Abstract

PROBLEM Create a one-use pull-on diaper in which the ability of the side seam to tear is excellent. SOLUTION The side seam S has a fastened zone 40 continuously extending in the longitudinal direction X. Elastic elements 80a and 80b extending in the transverse direction Y are located both in front A and and at the rear of B at intervals in the longitudinal direction. In one of the front part A and the rear part B, the end parts of the end parts of the elastic elements 80a and 80b located close to the side seam S do not reach the side seam S and end in places that are adjacent to the side of the side seam, the inner in the transverse direction, so that zone 9b is formed without elastic elements. In the zone 9b without elastic elements, the adhesive substance 10b is applied at intervals along the longitudinal direction X in places on an elongated line extending from the places where the elastic elements 80a and 80b are placed in the transverse direction Y, so that the end parts of the elastic elements 80b will be attached by adhesive substances 10b.

Description

AREA OF TECHNOLOGY TO WHICH FROM 110 A USEFUL MODEL

[0001] This utility model relates to a disposable pull-on diaper.

BACKGROUND OF THE INVENTION

[0002] Conventionally, as a pull-on disposable diaper similar to that shown in FIG. 10, diapers made with the crotch portion C containing the absorbent element, the front part A ′ and the rear part B ′, which extend from the crotch part C to the front side and the back side of the wearer, and formed with two side seams S ′, are widely used. a waist hole and two leg openings by attaching both side edges of the front portion A ′ and both side edges of the rear portion B ′ to each other. The front part A 'and the rear part B' in their zones located below the belt have a plurality of elastic elements 180 extending along the transverse direction of the diaper and spaced in the longitudinal direction of the diaper. The end portion of each elastic member 180 is typically located in the side seam S '.

[0003] When disposing of the diaper shown in FIG. 10, as shown in the same figure, an action is taken to tear the side seam S ′ from its end portion to open the diaper. If the end portions of the elastic members 180 are located in the side seam S ′ at this point, sheets such as nonwoven fabric forming the front portion A ′ and the rear portion B ′ may be torn, but the elastic members 180 cannot be torn, which may lead to a state in which the elastic elements 180 'of the front part A' and the elastic elements 180 'of the rear part B' will stretch in the state in which they were attached to each other. Such a connection of the elastic elements 180 'creates an obstacle when removing the diaper and getting rid of it.

[0004] As a conventional technical solution for improving the operation of tearing the side seam, it is known, for example, the technical solution described in Patent Literature 1. In the same literature it is proposed that areas near the side seams that are located around the leg openings in the disposable diaper stretchable use and are the fixing parts between both side edge parts of the front side and both side edge parts of the back side of the outer sheet, were areas without elastic x elements. In this literature, it is described that when this configuration is selected, the operation of removing the diaper from the carrier becomes easy.

[0005] In Patent Literature 2, it is proposed that both ends of the elastic elements located below the belt should not be in the side seams in the disposable pull-on diaper and that the side seams should be inextensible. In this literature, it is described that when choosing this configuration, the diaper can be torn in the side seams.

LIST OF LINKS

PATENT LITERATURE

[0006] Patent Literature 1: JP 2000-316899 A

Patent Literature 2: JP 2005-211673 A

ESSENCE OF A USEFUL MODEL

[0007] However, even if the technical solution described in each patent literature is selected, there is a case in which side seams cannot be successfully broken.

[0009] This utility model is a disposable pull-on diaper that is formed with a crotch portion, a front portion and a rear portion extending from a front side and a rear side of the crotch portion, and with two side seams formed by attaching respectively both side edge portions of the front parts and both side edge parts of the rear part to each other, and which has a longitudinal direction corresponding to the forward and backward directions relative to the carrier, and transverse ie the direction perpendicular to the longitudinal direction. The side seam has a bonded area, continuously extending along the longitudinal direction of the diaper. Many elastic elements extending in the transverse direction of the diaper are located both on the front and on the back in their extended state at intervals in the longitudinal direction of the diaper. In at least one of the front part and the rear part, the end part of the end parts of the elastic elements, located near the side seam, does not reach the location of the side seam and ends in places located next to the side of the side seam, internal in the transverse direction, so that between the side seam and the end parts of the elastic elements, an area without elastic elements is formed. In the area without elastic elements, the adhesive substance is applied to places on elongated lines extending in the transverse direction from the places in which the elastic elements were placed at intervals along the longitudinal direction of the diaper, and the end parts of the elastic elements are fixed by means of adhesive substance.

The technical result of the utility model is to simplify the tearing of side seams.

BRIEF DESCRIPTION OF THE DRAWINGS

[0011] [FIG. 1] FIG. 1 is a perspective view showing a wearing state of one embodiment of a stretchable disposable diaper according to the present utility model.

[FIG. 2] FIG. 2 is an expanded plan view showing a state in which the disposable diaper, shown in FIG. 1, has been deployed and stretched when viewed from the side of the top sheet of the disposable diaper to be pulled.

[FIG. 3] FIG. 3 is a side view showing the state in which the diaper shown in FIG. one.

[FIG. 4] FIG. 4 is a side view showing the side on which the side seam is torn from the wearing state shown in FIG. 3.

[FIG. 5] FIG. 5 is a perspective view showing a device suitably used to form the side seam of the diaper shown in FIG. one.

[FIG. 6] FIG. 6 (a) -6 (c) are explanatory views for explaining an aspect related respectively to the separation of a continuous diaper and the simultaneous formation of side seams by using the device shown in FIG. 5.

[FIG. 7] FIG. 7 is a view showing another example of a method of manufacturing a disposable pull-on diaper by using the device shown in FIG. 5 (view corresponding to FIG. 6 (c)).

[FIG. 8] FIG. 8 is a view illustrating a cross-section of the diaper shown in FIG. 1, in the transverse direction.

[FIG. 9] FIG. 9 is an illustrative view showing a sheet suitably used as the outer covering element of the diaper shown in FIG. one.

[FIG. 10] FIG. 10 is a side view showing a state in which a side seam of a conventional pull-on disposable diaper is torn.

DESCRIPTION OF EMBODIMENTS

[0008] This utility model relates to the implementation of a disposable pull-on diaper that can eliminate the disadvantage of a conventional technical solution.

[0012] The present utility model will be described below based on preferred embodiments thereof with reference to the drawings. In FIG. 1 shows one embodiment of a stretchable disposable diaper according to the present utility model. The diaper 1 shown in the same figure has a longitudinal direction X corresponding to the forward and backward directions relative to the wearer, and a transverse direction Y perpendicular to the longitudinal direction X. The diaper 1 is made with an absorbent assembly 5 including a top sheet 2, a back sheet 3 and an absorbent element 4 located between both of these sheets and an outer covering element 6 located on the side of the back sheet 3 of the absorbent set 5. In addition, the diaper 1 has a crotch part C and a front part and a rear portion B extending from the front side and rear side of the crotch portion C in the forward and rearward directions relative to the carrier. As shown in FIG. 1 and FIG. 2, the diaper 1 is formed symmetrically with respect to the longitudinal center line L extending along the longitudinal direction X.

[0013] As shown in FIG. 2, the outer covering element 6 of the diaper 1 extends over the entire area outside the absorbent assembly 5. The outer covering element 6 has a region central in the longitudinal direction and narrowed inward in the transverse direction from the side extending along the longitudinal direction X. In this case, the side seams S are formed by superimposing the inner surfaces of both side edge parts 6a and 6a of the front part A and the inner surfaces of both side edge parts 6b and 6b in the outer covering member 6 on top of each other in a state fit and attach them to each other. By forming the side seams S, as shown in FIG. 1, a diaper 1 is formed having a hole WO for the waist and two holes LO and LO for the legs. The side seam S extends along the longitudinal direction X of the diaper 1. In this case, the side seam S includes bonded zones formed by bonding the outer covering member 6 (zones shown at 40 in FIG. 6 (c) described later) and bonded the zones continuously extend linearly along the longitudinal direction X of the diaper 1.

[0014] An absorbent kit 5 is placed and attached to the inner surface of the outer covering member 6. As shown in FIG. 2, the absorbent assembly 5 is formed with a rectangular shape elongated in the longitudinal direction X. The absorbent element 4, which is present in the absorbent assembly 5, is also formed with a rectangular shape elongated in the longitudinal direction X. In the absorbent assembly 5, a zone in one part 5a thereof, endwise in the longitudinal direction, is attached to the front part A of the outer covering element 6 by an adhesive substance, and a zone in its other part 5b, endwise in the longitudinal direction, is attached to the rear part B of the outer covering element 6 by means of an adhesive substance.

[0015] As the top sheet 2, the back sheet 3, the absorbent member 4 and the outer covering member 6, mainly, mainly, elements similar to those traditionally used in such an absorbent article can be used. For example, a hydrophilic nonwoven material, a hydrophilic perforated polymer film or the like can be used as the top sheet 2. As the back sheet 3, a polymer film, a laminated element of water-repellent non-woven materials or the like can be used. As the absorbent element 4, a laminated fibrous element from cellulose tapes, a mixed laminated fibrous element from cellulose tapes and a highly absorbent polymer, an absorbent sheet obtained by holding the high absorbent polymer in the cellulosic sheet, or the like can be used. As the outer covering element 6, for example, water-repellent non-woven material can be used. As described later, the outer covering element 6 may be formed from an element obtained by joining a plurality of nonwoven materials by lamination.

[0016] In this description, the longitudinal direction X coincides with the direction extending along the long side of the diaper 1 or the absorbent assembly 5, which is a component of the diaper 1, namely its longitudinal direction, and the transverse direction Y coincides with the width direction of the diaper 1 or the absorbent kit 5, which is a component of the diaper 1.

[0017] As shown in FIG. 1 and FIG. 2, in the outer covering member 6, a plurality of elastic members 80a and 80b extending in the transverse direction Y of the diaper 1 are spaced apart in the longitudinal direction X of the diaper 1 in an extended state. In particular, as shown in FIG. 2, the outer covering member 6 is provided with an outer sheet 61 forming the outer surface of the diaper 1, an inner sheet 62 located on the side of the inner surface of the outer sheet 61, and a plurality of elastic elements 80a and 80b located between both sheets 61 and 62 and placed in a stretched state along the direction of Y width. The elastic elements 80a and 80b are arranged in a specific order in the zone located below the belt and in the waist zone of the diaper 1.

[0018] Further, in the outer covering member 6, the elastic leg members 90 are placed in a stretched state along curved zones in those side edge zones extending along the longitudinal direction X that are central in the longitudinal direction X. The elastic leg members 90 are also located and secured between the outer sheet 61 and the inner sheet 62.

[0019] The outer sheet 61 in the diaper 1 is so long that it extends further in the longitudinal direction X beyond the zones in which a plurality of threadlike elastic elements 80a and 80b are placed between the outer sheet 61 and the inner sheet 62 and secured by the outer sheet 61 and the inner of the sheet 62, and the protruding zones 61L (see FIG. 2) of the outer sheet 61 protruding from the inner sheet 62 are bent back to the side of the absorbent set 5 to close the longitudinal parts of the absorbent set 5, which are end. Adhesion of the bent protruding zones 61L to the inner sheet 62 is provided, for example, by an adhesive (not shown).

[0020] FIG. 3 shows a side view of a diaper 1 placed in a worn state. As shown in the same figure, a plurality of front elastic members 80a extending in the transverse Y direction of the diaper 1 are stretched in the front portion A. The front elastic members 80a are spaced in the longitudinal direction X of the diaper 1. Similarly, the plurality of elastic the back portions 80b extending in the transverse direction Y of the diaper 1 are also stretched in the rear portion B at intervals in the longitudinal direction X of the diaper 1. The elastic elements 80a of the front part The parts are arranged in such a way that the intervals between the two elastic elements 80a of the front part, adjacent to each other in the longitudinal direction through the intervals, represent the same interval. Similarly, with regard to the rear elastic members 80b, the intervals between two rear elastic members 80b adjacent to each other in the longitudinal direction at intervals represent the same interval. The front part A and the rear part B may be the same or may differ from each other with respect to the interval between the elastic elements. If you look at the placement of the elastic elements 80a and 80b along the longitudinal direction X, then the placement of the elastic elements 80 of the front part and the location of the elastic elements 80b of the rear part are essentially the same. The expression "substantially coincide" means that the distance in the longitudinal direction X between the location of the elastic part 80a of the front part (or the elastic part 80b of the rear part) and the position of the elastic part 80b of the rear part (the elastic part 80a of the front part) closest to it, is 2 mm or less.

[0021] The front elastic members 80a and the rear elastic members 80b are not located in an area in which the outer covering member 6 is superimposed on the absorbent assembly 5 in a plan view of the diaper 1. Therefore, the members are from the front elastic members 80a and the elastic members 80b the rear, located next to the waist opening WO, extend from one side seam S to the other side seam S, while elements from the front elastic members 80a and the rear elastic members 80b located far from the holes WO for the waist extend only from the side seam S to the lateral edge of the absorbent assembly 5. Thus, the elastic elements 80 a of the front and the elastic elements 80 b of the rear include elements having two kinds of zones differing in length.

[0022] If you focus on the positions of those end parts of the front elastic members 80a and the rear elastic members 80b that are adjacent to the side seam S, as shown in FIG. 3, it can be seen that the positions of those end parts of the front elastic members 80a that are adjacent to the side seam S and those of the end parts of the rear elastic members 80b that are adjacent to the side seam S are different from each other. In particular, the positions of those end portions of the front elastic members 80a that are adjacent to the side seam S coincide with the position of the side seam S. On the other hand, the positions of those end portions of the rear elastic members 80b that are adjacent to the side seam S, they don’t “reach” the location of the side seam S, and these end parts end at locations close to the inside of the side seam S in the transverse direction Y. Thus, a zone 9b without elastic elements is formed between the side seam S and the end portions of the elastic members 80b in the rear part of the rear portion B. On the other hand, no zone without elastic elements are formed in the front portion A.

[0023] An area 9b without elastic elements is formed in the rear portion B in the entire area in the longitudinal direction of the diaper 1. It goes without saying that a situation in which the end portion or end portions of one or more elastic portions of the rear portion 80b will inevitably be placed in the side seam S due to changes in the manufacturing conditions of the diaper 1 or the like, is acceptable if the effect of the present utility model is not reduced.

[0024] The fact that the front elastic members 80a and the rear elastic members 80b are located between the outer sheet 61 and the inner sheet 62 is previously indicated, but these front elastic members 80a and the rear elastic members 80b are attached to at least , one of the outer sheet 61 and the inner sheet 62 only at their both ends in their longitudinal directions. The portions of the elastic parts 80a of the front and the elastic elements 80b of the rear located between their both end parts can be placed in the loose state, or they can be attached to any one of the outer sheet 61 and the inner sheet 62.

[0025] An adhesive substance, such as, for example, a hot-melt adhesive, is used to attach the end parts of the elastic elements 80a and 80b to the sheets 61 and 62. Therefore, as shown in FIG. 3, adhesive 10a is applied at intervals along the longitudinal direction X of the diaper 1 at locations where the front elastic members 80a were placed in the front A near the side seam S, and the end portions of the front elastic members 80a will be secured with adhesive 10a. On the other hand, the adhesive substance 10b is applied to the previously described zone 9b without elastic elements and the zone located inside in the transverse direction Y with respect to zone 9b without elastic elements, in places on elongated lines extending from places where the elastic elements 80b are back the parts were placed in the transverse direction Y, and the end parts of the elastic elements 80b of the rear part will be fixed by adhesive substance 10b.

[0026] Since in the diaper 1 of this embodiment having the above configuration, the front elastic members 80a and the rear elastic members 80b are not connected to each other by the side seam S, when the side seam S is torn along the longitudinal direction X of the portion of the inner sheet itself 62, forming the side seam S, peel off, or the sheet material is torn along the part forming the side seam S, so that the situation in which a continuous element consisting of elastic elements 80a and 80b, remains in the side seam S. In particular, when the tensile strength of the sheet is higher than the bond strength of the side seam S, there is a predominant tendency for the side seam S to delaminate, but since in this embodiment, the front elastic members 80a and the elastic members The back part 80b is not connected to each other by the side seam S, a continuous element consisting of elastic elements 80a and 80b is unlikely to remain in the side seam S. On the contrary, when the bond strength of the side seam S is higher than the strength In the case of tearing, there is a tendency in which tearing of the sheet material predominantly occurs in a place near the side seam S, but since the amount of adhesive in this place is a small amount, even tearing of the sheet material easily occurs along the side seam S, and a continuous element consisting of elastic elements 80a and 80b is unlikely to remain in the side seam S.

[0027] For reasons related to ensuring that the above preferred effect becomes more significant, the width of zone 9b without elastic elements may exceed 0 mm, for example, preferably 0.01 mm or more, even more preferably 0.1 mm or more . In addition, the width of zone 9b without elastic elements is preferably 3 mm or less, more preferably 2 mm or less. For example, the width of zone 9b without elastic elements is preferably more than 0 mm and 3 mm or less, more preferably is in the range of 0.01 to 3 mm, even more preferably is in the range of 0.1 to 2 mm. The width is measured by cutting the side seam S from the diaper 1 and examining the side seam S in an unstretched state by means of a microscope.

[0028] Since the elastic members 80a and 80b in a stretched state are respectively placed at the front A and back B in the outer covering member 6 in the diaper 1, folds extending in the longitudinal direction X of the diaper 1 are formed on many lines extending in the transverse direction Y of the diaper 1, while wearing the diaper 1 due to the pulling together of the elastic elements 80a and 80b. However, since the elastic elements 80b are not located in the above-described zone 9b without the elastic elements provided in the rear portion B, no wrinkles are formed in the zone 9b, which may lead to a deterioration in the appearance of the diaper 1. Therefore, it is preferable that the wearing the distance between the side seam S and the end parts of the elastic elements 80b of the rear was less than the interval between two folds adjacent to each other in the transverse direction Y, in the zone 9b without elastic elements. With this configuration, zone 9b without elastic elements will be hidden in folds, making it difficult to see from the outside. As a result, deterioration of the appearance of the diaper 1 can be effectively prevented. The interval between the folds can be controlled, for example, by adjusting the degree of stretching at the moment the elastic elements 80a and 80b are fixed in the outer covering element 6 in an extended state.

[0029] The interval between two folds adjacent to each other in the transverse direction Y is measured as follows. The state in which the diaper 1 was stretched in the transverse direction is set as 100%, and the distance between the vertices of the fold and the other fold is measured at the time of stretching by 80%. This distance is defined as the interval between the folds. The state in which the diaper 1 has been stretched to 100% means an unfolded and stretched state, such as that shown in FIG. 2, and the expanded and extended state means a state obtained by tearing the side seams S, placing the diaper 1 in the expanded state, stretching the diaper in the expanded state and expanding / expanding the expanded diaper 1 until the elastic elements in the respective parts are stretched to specified sizes (the same as the size of the diaper 1, obtained by straightening the diaper 1 to a flat shape in a state in which the influence of the elastic elements was completely eliminated). The crease interval measured in this way is preferably 3 mm or more, more preferably 4 mm or more. In addition, the interval between the folds is preferably 10 mm or less, more preferably 7 mm or less. The fold interval is preferably, for example, in the range of 3 to 10 mm, more preferably in the range of 4 to 7 mm.

[0030] A diaper 1 having the above configuration can preferably be made in the following manner. That is, an outer sheet 61 and an inner sheet 62 are prepared, and a plurality of front elastic members 80a are placed and secured between both of these sheets in a stretched state so that the elastic members 80a extend in the same direction, and so as to obtain predetermined intervals between corresponding elastic elements 80a. In addition, a plurality of back elastic members 80b are placed and secured between both sheets 61 and 62 in a stretched state so that the elastic members 80b extend in the same direction, and so as to obtain predetermined intervals between the respective elastic members 80b. In addition, a plurality of leg elastic members 90 are placed and secured in a stretched state between the curved parts of the respective sheets 61 and 62. In this way, an outer covering member 6 is obtained. An absorbent member 5 is placed on the inner surface of the outer covering member 6 thus obtained and attached to the outer covering element 6. Further, the inner surfaces of both side edge parts 6a and 6a of the front portion A of the outer covering element 6 and the inner surfaces of both side cr the left parts 6b and 6b are stacked on top of each other so as to fit, and parts stacked on top of each other in the form of a foot are attached to each other along the longitudinal direction X of the diaper 1. The above-described zone 9b without elastic elements can be formed during bonding . Details will be described later.

[0031] The side seam S has a bonded area extending continuously along the longitudinal direction X of the diaper 1. Given the full bonding strength and ease of tearing of the side seam S, the appearance of the diaper 1 and the like, it is preferable that the side seam S be formed with a linear bonded zone "consisting" of a continuous line extending in the longitudinal direction X of the diaper 1.

[0032] Furthermore, from the viewpoint of improving the appearance of the diaper 1, it is preferable that in the side seam S, the non-fastened zone is absent laterally outside the fastened zone as much as possible. Most preferably, the non-bonded zone is completely absent, but when the non-bonded zone exists, its width is preferably 3 mm or less, more preferably 2 mm or less in its widest part.

[0033] For similar reasons, it is also preferable that the bonded area in the side seam S be as small as possible. It goes without saying that when the width of the side seam S is made excessively small, the bonding force of the front portion A and the rear portion B of the outer covering element 6 tends to decrease, which leads to the possibility of tearing the bonded area while wearing the diaper 1. Given these considerations, the width of the bonded the zone is preferably 0.01 mm or more, more preferably 0.1 mm or more. In addition, the width of the bonded zone is preferably 3 mm or less, more preferably 2 mm or less. For example, the width of the bonded zone is preferably in the range of 0.01 to 3 mm, more preferably in the range of 0.1 to 2 mm.

[0034] In order to successfully form the above-described zone 9b without the elastic elements in the diaper 1 of the embodiment, the side seam S is preferably formed by using laser-type equipment 120 for smelting cutting and shown in FIG. 5. The use of this equipment 120 is also preferable for reasons related to (i) that a linear bonded area “consisting” of a continuous line extending in the longitudinal direction of the diaper 1 is formed in the side seam S, (ii) due to the adjustment the non-bonded zone will be absent laterally outside the bonded zone as much as possible, (iii) that a small width of the bonded zone in the side seam S, and the like, will be obtained.

[0035] A method for forming a side seam S by using laser type equipment 120 for smelting cutting and shown in FIG. 5 is a method of forming a side seam S having bonded zones 40 (see FIG. 6 (c)) obtained by performing fusion bonding in a state in which the edge portions of both side edge portions 6a and 6a of the front cover portion A of the outer covering element 6 and both side edge parts 6b and 6b of the back portion B of the outer covering element 6 were stacked on top of each other, at least one sheet of sheets forming the outer covering element 6 includes a polymer material, and method on It includes the step of securing one surface of the sheet laminated element obtained by superimposing both side edge parts 6a and 6a of the front part A of the outer covering element 6 and both side edge parts 6b and 6b of the back part B of the outer covering element 6 in the form of a stack on top of each other , to a support having a part for the passage of light through which the laser beam can pass, separating the laminated sheet element by irradiating the laminated sheet element in compression state, by laser radiation having a wavelength absorbed by the sheets forming the laminated sheet element, and providing heat from the sheets from the support side through the part for the passage of light and at the same time bonding the sharp edge parts of the outer covering element 6 in a compressed state and formed by separation by fusion to form bonded zones 40. This method will be described below with reference to FIG. 5.

[0036] Laser-type equipment 120 for bonding and similar to that shown in FIG. 5, is made with a hollow cylindrical roller 123 with a cylindrical (annular) support 121, driven in rotation in the direction of arrow A, an irradiating head 135 located in the hollow part of the support 121 and emitting laser radiation 130, and a belt-type pressing device 126 provided with an endless a pressure tape 124 (pressure element) serving as pressure means, and a plurality of rollers 125a, 125b and 125c driven to rotate in a state where pressure belt 124 is “closed”. The laser-type equipment 120 for fastening is provided with a tension adjustment mechanism (not shown) that can adjust so as to increase / decrease the tension of the pressing tape 124 wound on the outer circumferential surface (circumferential circumferential surface of the cylindrical roller 123) of the ring support 121 , and the pressure to be applied to the continuous diaper 110 (laminated sheet element) by means of the support 121 and the pressing tape 124 can be adjusted Rowan appropriately in accordance with the tension control. Continuous diaper 110 is a blank for the manufacture of diapers 1 according to this embodiment and has a shape in which a plurality of diapers 1 continuously extend along the transverse direction Y. In continuous diaper 110, elastic members 80a and 80b are attached to the outer sheet 61 in the zone below the waistband and / or the inner sheet 62 by means of an adhesive substance only in the portion 110C to be cut (see Fig. 6), described later, and in the area near it.

[0037] The support 121 forms a peripheral surface part (the part adjacent to the workpiece) of the cylindrical roller 123 and is positioned and secured between two annular frames 122 and 122, forming both side edge parts of the cylindrical roller 123. The support 121 consists, for example, of one ring element having the same length as the circumference of the annular frame 112, and it is made of a metal material, such as iron, aluminum, stainless steel or copper, or of a heat-resistant material, such as ceramic.

[0038] The support 121 has a part for the passage of light through which the laser light / laser beam can pass. The support 121 has a slit-like hole 127 extending through the support 121 in the direction of its thickness, as part of the passage of light. The hole 127 has a rectangular shape in a plan view, while ensuring that its longitudinal direction coincides with the width direction (direction parallel to the rotating axis of the cylindrical roller 123) of the support 121, and a plurality of holes 127 are formed at predetermined intervals along the circumferential direction of the cylindrical support 121. Support 121 is configured to ensure that the laser radiation / beam passes through the openings 127 while preventing the passage (penetration) of the laser radiation / beam through cutting parts other than holes 127. As a method of forming holes 127 in a support 121, in addition to 1) a method of forming holes 127 in predetermined parts on a support 121 by means of etching, punching, laser processing or the like, 2) a method of use as a support 121 - a set of curved rectangular elements instead of one ring element and placing a given set of elements between two frames 122 and 122 at predetermined intervals in the circumferential direction of the frame 122. In the above method 2) the interval between two elements adjacent to each other, forms a slot-shaped opening 127.

[0039] It should be noted that since in the laser-type equipment 120 for bonding, a part for the passage of light through which the laser light / laser beam can pass is formed from a slit-like opening 127 passing through the support 121 in the thickness direction, part of a continuous diaper 110, superimposed on the area of the hole 127, namely, the part to be separated, comes into contact only with the pressing tape 124 and is not placed between the support 121 and the pressing tape 124. Therefore, strictly speaking, the compressive force, s zdaval due to placement between the two elements 121 and 124, I am not formed in the part to be separated. However, even if the part to be divided and superimposed on the area of the hole 127 itself is not sandwiched between both elements 121 and 124, the area near the part to be divided, namely, the part of the continuous diaper 110 superimposed on the area near the hole 127, is pinched between both elements 121 and 124, so that the part to be separated does not move before and after irradiation with the laser beam, and therefore the sharp edge parts resulting from the separation of the continuous diaper 110, which ensures aetsya due to irradiation by the laser beam, do not move. That is, the portion of the continuous diaper 110 to be separated is the portion held by the squeezing force due to the clamping between the two elements 121 and 124 and actually exposed to the squeezing force.

[0040] A belt-type pressing device 126 is provided with an endless pressing tape 124 and three rollers 125a, 125b and 125c rotating in a state in which the pressing tape 124 is “closed”. The rollers 125a, 125b and 125c may be drive rollers or may be non-drive rollers rotating in accordance with the rotation of the cylindrical roller 123. The pressing belt 124 rotates at least one of the rollers 125a, 125b and 125c to allow it to move at a speed the same as the speed of the cylindrical roller 123 (bearings 121). The temperatures of the support 121 and pressure belt 124 are preferably maintained in predetermined temperature ranges by air cooling, water cooling, or the like.

[0041] As the pressing tape 124, a tape made of metal or resin with high heat resistance can be used that can withstand the heat generated during operation and is made of a metal material, such as, for example, iron, aluminum or stainless steel. . Furthermore, as the pressing tape 124, a pressing tape is generally used which is impervious to laser radiation emitted to the continuous diaper 110, which is a blank, but a pressing tape which is permeable to laser radiation can also be used.

[0042] As shown in FIG. 5, an irradiating head 135, which emits a laser beam 130 towards the support 121, forming the peripheral surface of the cylindrical roller 123, is provided in the hollow part of the hollow cylindrical roller 123 (support 121). The irradiating head 135 is a galvanoscanner that freely scans the laser beam 130, and it is equipped with a mechanism that moves the laser beam 130 forward and its removal in a direction parallel to the rotating axis of the cylindrical roller 123, a mechanism that provides movement of the place (point of irradiation), in which the laser beam 130 is incident on the continuous diaper 110 on the support 121, in the direction along the circumference of the cylindrical roller 123, by a mechanism that ensures a constant diameter of the track of the laser beam and 130 on the circumferential peripheral surface of the cylindrical roller 123, and the like. Since the laser irradiation mechanism has such a configuration, the laser irradiation point 130 can be moved arbitrarily both in the direction along the circumference of the cylindrical roller 123 and in the direction perpendicular to the direction along the circle, namely in the direction parallel to the rotating axis of the cylindrical roller 123.

[0043] As shown in FIG. 5, a continuous diaper 110 is placed on the outer surface of a support 121 forming a peripheral surface of a cylindrical roller 123 rotated in the direction of arrow A, in such a state that the continuous diaper 110 will already be under the influence of a predetermined tension by means of a guide roller (not shown) or the like, and after moving it a predetermined distance in the circumferential direction of the cylindrical roller 123 in accordance with its rotation to wind the continuous diaper 110 about yell 121 continuous diaper 110 is separated from support 121 by a deflection roller, pinch rollers (not shown) or the like. By winding the continuous diaper 110 onto a support 121 forming the peripheral surface of the cylindrical roller 123 with a predetermined tension and moving the continuous diaper 110 so that it is brought into pressure contact with the cylindrical roller 123 by means of the pressing tape 124 in a similar manner, part of the continuous diaper 110 sandwiched between the support 121 and the pressing tape 124, and the part located close to it, are transferred to the state of compression in the direction of thickness before separation, performed by laser irradiation ray. Therefore, the continuous diaper 110 can be compressed more efficiently when the continuous diaper 110 includes a non-woven material formed from a synthetic resin or the like. As a result, by irradiating the continuous diaper 110 in a squeezed state with a laser beam and separating it, it becomes possible to fasten the sharp edge parts of the plurality of sheets forming the divided part by fusion in a more reliable manner, and thus, the strength of the bonded zone can be increased. obtained by fusion bonding in the area of the side seam S.

[0044] The angle of rotation of the support 121 (cylindrical roller 123) from the placement of the continuous diaper 110 on the support 121 to its separation from the support 121 can be set, for example, in the range from 90 to 270 degrees, more preferably in the range from 120 to 270 degrees . In addition, the angular range in which the continuous diaper 110 is brought into pressure contact with the support 121 by the pressing belt 124 is preferably a range of 90 to 270 degrees, more preferably a range of 120 to 270 degrees when the case in which is continuous the diaper 110 is pressed into contact with the cylindrical support 121 (cylindrical roller 123) on the entire circumferential periphery in the direction along the circumference of the cylindrical support 121 (cylindrical roller 123), defined as 360 degrees.

[0045] In a method of forming a side seam S, similar to that shown in FIG. 5, during continuous movement of the continuous diaper 110, one surface 110a (see FIG. 6 (a)) of the continuous diaper 110 is brought into pressure contact with the outer surface of the support 121 forming the peripheral surface of the cylindrical roller 123 and having slit-like openings 127 through which the laser beam 130 can pass, and by irradiating the continuous diaper 110 in a squeezed state with the laser beam 130 through the hole 127 from the side of the support 121, the continuous diaper 110 is separated, and at the same time razovannye cutting edge portion of the plurality of sheets are pressed-in condition, which were formed by dividing, by the fusion bonded to form a side seam S.

[0046] In more detail, as shown in FIG. 5, by pressing the pressing tape 124 against another surface 110b (see FIG. 6 (a): a surface opposite to that one surface 110a, which is the pressure contact surface with the support 121) of the continuous diaper 110 that has been inserted in the pressure contact with the support 121, and irradiation of the continuous diaper 110, in this state, with a laser beam 130 through the slit-like hole 127 from the side of the support 121, continuous production of diapers 1 having two side seams S can be ensured. it is preferred that the laser beam 130 be irradiated with a continuous diaper 110 that has been squeezed due to a clamp between the support 121 and the pressing tape 124, for reasons related to the sharp edges formed of the plurality of sheets that were formed by irradiation can be fastened securely by the fusion method, and the fusion strength of the side seam S is increased.

[0047] FIG. 6 (a) -Fig. 6 (c) are views showing an aspect related to the separation of the continuous diaper 110 and the simultaneous formation of the side seam S by using laser-type equipment 120 for fastening, and the portion 110C of the continuous diaper 110 to be separated by the laser beam 130, and the area near it is illustratively shown in FIG. 6 (a). The portion 110C of the continuous diaper 110 to be divided is a central part in an area in which the absorbent set 5 of the continuous diaper 110 is not disposed in the movement direction A. Such a part 110C to be separated is a part with a four-layer structure obtained by, for example, joining four sheets by lamination. A part with a four-sheet structure similar to that shown in FIG. 6 (a) consists of two sheets (outer sheet 61 and inner sheet 62) of the front A and two sheets (outer sheet 61 and inner sheet 62) of the back B, and it is configured by bonding these four sheets by lamination. It should be noted that the elastic elements 80a and 80b are arranged and arranged in a specific order between sheets 61 and 62 stacked on top of each other, but the illustration of the elastic elements 80a and 80b is omitted for reasons of ease of explanation.

[0048] In the portion 110C to be separated, in the continuous diaper 110, one or both of the outer sheet 61 forming one surface 110a (the pressure contact surface of the support 121) of the continuous diaper 110 and a sheet (inner sheet 62) other than the outer sheet 61 forming this single surface 110a are sheets that absorb laser radiation 130 and generate heat. In addition, two sheets, stacked on top of each other in the portion 110C to be separated, or in an area close to it, may be attached to each other by means of an adhesive substance or the like before irradiation with a laser beam 130, or they may not be at all attached to each other.

[0049] A continuous diaper 110 similar to that shown in FIG. 6 (b) is placed on a support 121, rotating in the direction of arrow A, so that one surface 110a is brought into pressure contact with the support 121 and the part 110C to be separated is placed over the slit-like opening 127, and the pressing tape 124 is pressed against the other surface 110b, so that the continuous diaper 110 is compressed in the direction of its thickness while moving it in the direction of arrow A. The portion 110C to be separated and in a compressed state is irradiated with a laser beam 130 from the side of the support 121 through the hole 127 during t one move. As described above, since it is possible to arbitrarily move the irradiation point of the laser beam 130 in the direction along the circumference of the cylindrical roller 123, and it is set to move after the movement of the hole 127 along the circumferential direction, the portion 110C to be divided and placed over the hole 127 is continuously is irradiated with a laser beam 130 for a fixed period of time during the movement.

[0050] When the portion 110C to be separated is irradiated with a laser beam 130, the materials (synthetic resin or the like) that form the sheets 61 and 62 present in the portion 110C to be separated are evaporated by heat due to direct exposure to the laser beam 130 and disappear, and the forming materials present in the area near the portion 110C to be separated are indirectly heated and melted. As a result, as shown in FIG. 6 (c), the part 110C to be separated is cut by melting so that the continuous diaper 110 is separated so that one diaper is cut off from the continuous diaper 110, and at the same time, the edge parts of the four sheets 61 and 62 formed by the sharp diaper 110 are cut, which were formed as a result of separation, and the sharp edges formed by the four sheets 61 and 62 in the continuous diaper 110, which were separated from each other, are respectively bonded to each other by fusion. The data formed by the sharp edge portions were brought into a compressed state (compressed state) due to clamping, respectively, between the support 121 and the pressing tape 124 before being formed (before the continuous diaper 110 was separated by irradiation with a laser beam 130).

[0051] In addition, by smelting the portion 110C to be separated by the laser beam 130, the adhesive substance (not shown) that secures the elastic elements 80a and 80b in the continuous diaper 110 is softened. Since the elastic members 80a and 80b were placed in a stretched state, the end portions of the elastic members 80a and 80b resulting from the cutting of the melt sheets are slightly retracted inward in the transverse direction Y due to this softening. As a result, the end parts of the elastic elements 80a and 80b are separated from the bonded zone 40 of the side seam S formed by smelting and fusion bonding. The above-described zone without elastic elements is formed due to this compartment.

[0052] As is obvious from the above explanation, since a zone without elastic elements is formed by separating those end parts of the elastic elements 80a and 80b that have arisen as a result of separation from the fastened zone 40 of the side seam S, it is possible that the zone without elastic elements will be formed in any of the front part A and the back part B, between which the side seam S is located. Whether the area without elastic elements will be formed in the area of the front part A or in the area of the back part B (or in both zones) T-type or applied amount of the adhesive substance enabling fixation of the elastic members 80a and 80b, or by laser beam irradiation mode 130.

[0053] Since, in accordance with the method of forming the side seam S by using the equipment shown in FIG. 5, the separation of the continuous diaper 110 and the fastening formed by the sharp edge parts of the sheets in a compressed state by fusion in two parts are performed simultaneously by a single laser beam irradiation, fusion bonding and separation can be performed at the same stage due to the output power laser, which is half of the laser output in a method for producing two fusion bonded zones by two laser beam irradiations, so that can be the manufacturing efficiency of diapers 1 is ensured. In addition, since fusion bonding and separation can be performed at the same stage, an unfastened zone in which the edge portions of the sheets formed by the sharp edges are not bonded to each other by the fusion method does not occur, so that the appearance diaper 1 is getting good.

[0054] The sharp edge portions of the sheets 61 and 62 produce heat and melt during irradiation with the laser beam 130 or immediately after irradiation, but there is a tendency to cool each diaper separated from the continuous diaper 110 by irradiation with the laser beam 130, and continuous diaper 110 due to contact with the support 121 after completion of irradiation, while they remain in a compressed state between the support 121 and the pressing tape 124, and they quickly cool and harden due to the transfer of t pla outside air, a support 121 and a pressing belt 124 so as to form the zone 40, the fusion-bonded and obtained by melting and combining into one of the materials forming the edge portions formed by cutting and comprising an adhesive substance. Area 40, bonded by fusion, is formed in such a way that one of a pair of side seams S and S is formed in one diaper 1. If necessary, it is possible to forcibly cool the edge portions of sheets 61 and 62 formed by sharp so as to contribute to the formation of zone 40 fastened by the method fusion, using a known cooling means, such as a suction device or a pumping device.

[0055] When one part 110C to be separated is divided in this way, the laser beam 130 moves so that the irradiation point hits another hole 127 adjacent to the previous hole 127 in the direction opposite to the direction of movement A, and the other the part 110C to be separated and placed above the other hole 127 is irradiated with a laser beam 130 through another hole 127. Thus, the separation and fastening of the other part 110 to be separated by fusion is performed similarly to the above, so that another side seam S is formed, forming a pair with the side seam S previously formed. After that, diapers 1 having a pair of side seams S and S are formed continuously by repeating a similar operation. In this method, the side seam S of the diaper 1 is formed by a fusion fastening method using laser beam irradiation, but it is not formed by another fusion fastening method.

[0056] When the diameter 0 of the spot (part irradiated by the laser beam 130) of the laser beam 130 on the continuous diaper 110 is less than the width W (see FIG. 6 (b): this is the length of the hole 127 along the circumferential direction of the cylindrical roller 123) of the slit-like hole 127 through which the laser beam 130 is irradiated (when ∅ / W is less than 1), as shown in FIG. 7, two side seams S and S, formed by irradiation with a laser beam 130, can be located in the continuous diaper 1 zone, placed over the hole 127 (slotted hole zone 127, located between the two edge parts of the hole along the direction perpendicular to the direction of movement A view in plan). That is, the bonded zone 40 can be formed even in the continuous diaper zone 1, which is not sandwiched between the support 121 and the pressing tape 124, if this zone is a zone near the opening 127, namely, the zone that is actually affected by the compressive force caused by the clamp between both elements 121 and 124, as described above.

[0057] In the diaper 1 obtained in this manner as shown in FIG. 8, the thickness T1 of the side seam S is greater than the thickness T2 of the portion adjacent to the side seam S of each of the front portion A and the back portion B of the outer covering element 6 forming the side seam S. The thickness T1 of the side seam S is measured by cutting out the side seam S and inspecting the cross-section of the side S seam in an unloaded condition using a microscope. The thickness T2 of the front part A and the back part B of the outer covering element 6 is measured by inspecting the cross-section of the outer covering element 6 in a place where no wrinkles are formed, which is adjacent to the side seam S and on which adhesive substances 10a and 10b are applied by using a microscope. The thickness T2 of the front part A and the rear part B of the outer covering member 6 is determined as the width value obtained by measuring the distance between the flat plates in a state where the outer covering member 6 was placed between the flat plates and a load of 0.5 cN / cm ² , was attached between flat plates. When measuring the thickness of a side seam or the like using a microscope, three sections / sections of one side seam of the diaper, spaced longitudinally apart from each other, are examined with a magnification of 50 to 200 times using a microscope (model VHX-1000 manufactured by KEYENCE) or the like, respectively, to obtain the thickness values in the respective sections / in the respective sections, so that the thickness T2 is obtained as the average thickness in the three sections / in the three sections. The thickness T1 of the side seam S is preferably 0.2 mm or more, more preferably 0.25 mm or more, and it is preferably 2 mm or less, more preferably 1.5 mm or less. For example, the thickness T1 of the side seam S is preferably in the range of 0.2 to 2 mm, more preferably in the range of 0.25 to 1.5 mm.

[0058] According to the manufacturing method described above, when a side seam S is formed, a zone without elastic elements is formed approximately at the same time, but instead, a zone without elastic elements can be formed while wearing the diaper 1. In particular, in the above-described manufacturing method, that an area without elastic elements will not be formed during the formation of the side seam S, it will be provided / defined by appropriately adjusting the type or amount of adhesive applied, subject to use, or the laser beam irradiation mode 130. In the diaper 1 thus obtained, the position of the end portion of each of the elastic elements 80a and 80b coincides with the position of the side seam S. When wearing the diaper 1 in this state, the load will be applied to each of the elastic elements 80a and 80b due to the stretching of each of the elastic elements 80a and 80b due to wearing. At this point, it is possible to retract the end portion of each of the elastic elements 80a and 80b inward in the transverse direction Y by properly selecting the type or amount of adhesive to be applied. The end portion of each of the elastic members 80a and 80b is separated from the bonded area 40 of the side seam S by this retraction. The above-described zone without elastic elements is formed due to this compartment. All this leads to the fact that when removing the diaper 1 by tearing the side seam S of the diaper 1, the disadvantage described in the item “Prior art”, such as that shown in FIG. 10 is unlikely to occur, since the elastic element 80a and the elastic element 80b are not connected to each other via the side seam S.

[0059] As is clear from the above explanation, a zone without elastic elements may already be formed in a state before wearing a diaper 1, or a zone without elastic elements may not be formed in a state before wearing a diaper 1, but it may be formed in a state of wearing a diaper 1 In a word, it is only required that a zone without elastic elements be formed before tearing the side seam S to remove the diaper 1.

[0060] Although the present utility model has been explained above based on the preferred embodiment, it is not limited to the above embodiment. For example, in the above embodiment, as a preferred method of forming the side seam S, for example, cutting was performed by laser cutting and using the device shown in FIG. 5, but the method of forming the side seam S is not limited to this method, and another method can be selected, for example, a heat welding method, an ultrasonic welding method, a high frequency welding method, a gluing method using an adhesive substance or the like.

[0061] As the outer covering member 6, the outer covering member shown in FIG. 9. The outer covering element 6 shown in this figure has an outer sheet 61 and an inner sheet 62, with the plurality of elastic elements 80 extending in the transverse direction of the diaper 1, being placed in a certain order in a stretched state. Each of the elastic members 80 is attached to at least one of the outer sheet 61 and the inner sheet 61 only in its both end parts. In addition, all the elastic elements 8 0 are not attached to the outer sheet 61 and the inner sheet 62 in the region between both end parts. In addition, the outer sheet 61 and the inner sheet 62 are fastened to each other by fastened zones 63 located between two elastic elements 80 adjacent to each other in the longitudinal direction X of the diaper 1. Preferably, the fastened zones 63 form rows of 64 fastened zones arranged sequentially along the longitudinal direction X of the diaper 1, as shown in the same figure. Preferably, the rows of 64 bonded zones are parallel in the transverse direction Y of the diaper 1. When choosing such an outer covering element 6, folds can be formed having an even better appearance.

[0062] Furthermore, the diaper of the above embodiment has an outer covering member 6 extending from the front portion A to the rear portion C through the crotch portion C, and an absorbent assembly located on the inner surface of the outer covering member 6, but instead is a true utility model can be applied in a similar way to a disposable diaper in which the absorbent assembly connects, like a bridge, a front sheet element including s from the waist elastic members and the rear plate member including a disposed below the belt, the elastic members.

[0063] Furthermore, in the above embodiment, a zone 9b without elastic elements is formed only in the rear portion B of the diaper 1, but instead, a zone without elastic elements can only be formed in the front portion A of the diaper 1. Alternatively, zones without elastic elements can be located both in front of A and in the rear of B.

[0064] In view of the above embodiments, the present utility model discloses a stretchable disposable diaper below.

<1> A disposable stretchable diaper comprising a crotch portion, a front portion and a rear portion extending from a front side and a rear side of the crotch portion, and two side seams obtained by bonding respectively both side edge parts of the front part and both side edge parts of the back part , and having a longitudinal direction corresponding to the forward and backward directions relative to the carrier, and a transverse direction perpendicular to the longitudinal direction, wherein

the side seams have fastened zones, continuously extending along the longitudinal direction of the diaper,

a plurality of elastic elements extending in the transverse direction of the diaper are located both in front and in the rear at intervals in the longitudinal direction of the diaper in a stretched state,

in at least one of the front part and the rear part, the end parts of the end parts of the elastic elements located near the side seams do not reach the location of the side seams and end in places adjacent to the sides of the side seams, internal in the transverse direction, so that between the side seams and the end parts of the elastic elements, zones without elastic elements are formed, and

in the area without elastic elements, the adhesive substance is applied at intervals along the longitudinal direction of the diaper in places on an elongated line extending from places in which the elastic elements were placed in the transverse direction, so that the end parts of the elastic elements are attached by adhesive substance.

[0065] <2> A disposable pull-on diaper

use described in paragraph <1>, in which a zone without elastic elements is formed on the entire zone of the diaper in the longitudinal direction of the diaper.

<3> A disposable diaper as described in <1> or <2> in which the width of the zone without elastic elements is preferably greater than 0 mm, more preferably 0.001 mm or more, even more preferably 0.01 mm or more, and preferably 3 mm or less, more preferably 2 mm or less.

<4> A disposable pull-on diaper described in any one of <1> to <3>, wherein in the front part, a plurality of elastic elements of the front part extending in the transverse direction of the diaper are spaced apart in the longitudinal direction of the diaper in a stretched state,

in the rear part, a plurality of elastic elements of the rear part extending in the transverse direction of the diaper are spaced apart in the longitudinal direction of the diaper in an extended state, and

elastic elements of the front part and elastic elements of the rear part are not connected to each other by means of a side seam.

<5> A disposable pull-on diaper described in any one of <1> to <4>, wherein the non-fastened zone is absent outside the fastened zone in the lateral seam in the transverse direction of the diaper.

<6> A disposable pull-on diaper described in any one of <1> to <5>, wherein a plurality of folds extending along the longitudinal direction of the diaper are formed on the front and rear in the transverse direction of the diaper by pulling together elastic members, and

in the zone without elastic elements, the distance between the side seam and the end parts of the elastic elements is less than the interval between two of the folds, adjacent to each other in the transverse direction, in the state before wearing the diaper.

[0066] <7> The disposable diaper as described in <6>, wherein the fold spacing is preferably 3 mm or more, more preferably 4 mm or more, and preferably 10 mm or less, more preferably 7 mm or less.

<8> A disposable pull-on diaper described in any one of <1> to <7>, wherein the front and back have an outer sheet, an inner sheet, and elastic elements located between the outer sheet and the inner sheet,

the elastic elements are attached to at least one of the outer sheet and the inner sheet only in their both end parts and are placed in an unsecured state relative to both the outer sheet and the inner sheet, in those areas of the elastic elements that are between these two end parts , and

the outer sheet and the inner sheet are fixed at intervals to each other between two elastic elements located next to each other along the longitudinal direction of the diaper.

<9> A disposable diaper as described in any one of <1> to <8>, wherein the thickness of the side seam is greater than the thickness of each of the portions of the front and rear portions forming the side seam, wherein these portions are located adjacent to the side seam .

<10> A disposable diaper as described in any one of <1> to <9>, wherein the width of the bonded zone is preferably 0.01 mm or more, more preferably 0.1 mm or more, and preferably 3 mm or less, more preferably 2 mm or less.

<11> A disposable diaper as described in any one of <1> to <10>, wherein the thickness of the side seam is preferably 0.2 mm or more, more preferably 0.25 mm or more, and preferably 2 mm or less, more preferably 1.5 mm or less.

[0067] <12> A disposable pull-on diaper

use described in any one of paragraphs <1> to <11>, wherein in the front part, a plurality of elastic elements of the front part extending in the transverse direction of the diaper are spaced apart in the longitudinal direction of the diaper in a stretched state, and

the elastic elements of the front part are arranged so that the intervals between the respective two elastic elements of the front part adjacent to each other with intervals in the longitudinal direction of the diaper are the same interval.

<13> a disposable pull-on diaper described in any one of <1> to <12>, wherein in the rear part, a plurality of elastic elements of the rear part extending in the transverse direction of the diaper are spaced apart in the longitudinal direction of the diaper in a stretched state, and

the elastic elements of the rear part are arranged so that the intervals between the respective two elastic elements of the rear part adjacent to each other with intervals in the longitudinal direction of the diaper are the same interval.

<14> A disposable pull-on diaper described in any one of <1> to <13>, wherein in the front part, a plurality of elastic elements of the front part extending in the transverse direction of the diaper are spaced apart in the longitudinal direction of the diaper in a stretched state,

in the rear part, a plurality of elastic elements of the rear part extending in the transverse direction of the diaper are spaced apart in the longitudinal direction of the diaper in an extended state, and

the interval between two elastic elements of the front part adjacent to each other with an interval in the longitudinal direction is equal to the interval between two elastic elements of the front part adjacent to each other with an interval in the longitudinal direction.

<15> A disposable pull-on diaper described in any one of <1> to <14>, wherein in the front part, a plurality of elastic elements of the front part extending in the transverse direction of the diaper are spaced apart in the longitudinal direction of the diaper in a stretched state,

in the back, a plurality of elastic elements of the back extending in the transverse direction of the diaper are spaced apart in the longitudinal direction of the diaper in an extended state, and,

when the locations of the elastic elements of the front and the elastic elements of the rear are looked along the longitudinal direction, the placement of the elastic elements of the front is approximately the same as the placement of the elastic elements of the rear.

<16> A disposable pull-on diaper described in any one of <1> to <15>, wherein in the front part, a plurality of elastic elements of the front part extending in the transverse direction of the diaper are spaced apart in the longitudinal direction of the diaper in a stretched state,

in the rear part, a plurality of elastic elements of the rear part extending in the transverse direction of the diaper are spaced apart in the longitudinal direction of the diaper in an extended state, and

the positions of the end parts of the elastic elements of the front located next to the side seam are different from the positions of the end parts of the elastic elements of the rear located next to the side seam.

<17> A disposable pull-on diaper described in any one of <1> to <16>, wherein in the front part, a plurality of elastic elements of the front part extending in the transverse direction of the diaper are spaced apart in the longitudinal direction of the diaper in a stretched state,

in the rear part, a plurality of elastic elements of the rear part extending in the transverse direction of the diaper are spaced apart in the longitudinal direction of the diaper in an extended state,

the position of the end parts of the elastic elements of the front part located next to the side seam coincide with the position of the side seam, and

the end parts of the elastic elements of the rear part, located next to the side seam, do not reach the location of the side seam and end in places located next to the side of the side seam, internal in the transverse direction.

[0068] <18> A disposable pull-on diaper described in any one of <1> to <17>, wherein a zone without elastic elements is formed only in the rear, a zone without elastic elements is formed only in the front, or a zone without elastic elements formed both in front and in the back.

<19> A disposable pull-on diaper described in any one of <1> to <18>, in which a zone without elastic elements has already been formed in a state before wearing the diaper.

<20> A one-time stretchable diaper described in any one of <1> to <18>, in which a zone without elastic elements is not formed in a state before the diaper is worn, but in a state where the diaper has been worn, the elastic elements are stretched so that the end parts of the elastic elements are pulled inward in the transverse direction, which leads to the formation of a zone without elastic elements.

INDUSTRIAL APPLICABILITY

[0010] According to the present utility model, tearing of the side seam of the diaper is greatly facilitated, resulting in an easy diaper change.

Claims (40)

1. A disposable stretchable diaper comprising a crotch portion, a front portion and a rear portion extending from a front side and a rear side of the crotch portion, and two side seams obtained by bonding both side edge portions of the front portion and both side edge portions of the rear portion, respectively and having a longitudinal direction corresponding to the forward and backward directions relative to the carrier, and a transverse direction perpendicular to the longitudinal direction, wherein the side seams have fastened zones, continuously extending along the longitudinal direction of the diaper, a plurality of elastic elements extending in the transverse direction of the diaper are located both in front and in the rear at intervals in the longitudinal direction of the diaper in a stretched state, in at least one of the front part and the rear part, the end parts of the end parts of the elastic elements located near the side seams do not reach the location of the side seams and end in the places adjacent to the sides of the side seams, internal in the transverse direction, so that between the side seams and the end parts of the elastic elements are formed zones without elastic elements, while in the area without elastic elements, the adhesive substance is applied at intervals along the longitudinal direction of the diaper in places on an elongated line extending from places in which the elastic elements were placed in the transverse direction, so that the end parts of the elastic elements are attached by adhesive substance. 2. The disposable pull-on diaper according to claim 1, wherein the zone without elastic elements is formed over the entire diaper zone in the longitudinal direction of the diaper. 3. The disposable diaper according to claim 1 or 2, wherein the width of the zone without elastic elements is greater than 0 mm and is 3 mm or less. 4. The disposable diaper according to claim 1, wherein the front portion of the plurality of elastic elements of the front extending in the transverse direction of the diaper are arranged in the longitudinal direction of the diaper at intervals in the extended state, in the rear part, a plurality of elastic elements of the rear part extending in the transverse direction of the diaper are arranged in the longitudinal direction of the diaper at intervals in the extended state, and elastic elements of the front part and elastic elements of the rear part are not connected to each other by means of a side seam. 5. The disposable diaper according to claim 1, wherein the non-fastened zone is absent outside the fastened zone in the side seam in the transverse direction of the diaper. 6. The disposable diaper according to claim 1, wherein a plurality of folds extending along the longitudinal direction of the diaper are formed on the front and rear in the transverse direction of the diaper when the elastic members are pulled together, and in the zone without elastic elements, the distance between the side seam and the end parts of the elastic elements is less than the interval between two of the folds, adjacent to each other in the transverse direction, in the state before wearing the diaper. 7. The disposable diaper according to claim 1, wherein the interval between the folds is in the range of 3 mm or more to 10 mm or less. 8. The disposable diaper according to claim 1, wherein the front and back have an outer sheet, an inner sheet, and elastic elements located between the outer sheet and the inner sheet, the elastic elements are attached to at least one of the outer sheet and the inner sheet only in their both end parts and are placed in an unsecured state relative to both the outer sheet and the inner sheet, in those zones of elastic elements that are between these two end parts , and the outer sheet and the inner sheet are fixed at intervals to each other between two elastic elements located next to each other along the longitudinal direction of the diaper. 9. The disposable diaper according to claim 1, wherein the thickness of the side seam is greater than the thickness of each of the portions of the front and rear portions forming the side seam, wherein these portions are located adjacent to the side seam. 10. The disposable diaper according to claim 1, wherein the width of the bonded zone is in the range of 0.01 mm or more to 3 mm or less. 11. The disposable diaper according to claim 1, wherein the thickness of the side seam is in the range of 0.2 mm or more to 2 mm or less. 12. The disposable diaper according to claim 1, wherein the front portion of the plurality of elastic elements of the front extending in the transverse direction of the diaper are arranged in the longitudinal direction of the diaper at intervals in the extended state, and the elastic elements of the front part are arranged so that the intervals between the respective two elastic elements of the front part adjacent to each other with intervals in the longitudinal direction of the diaper are the same interval. 13. The disposable diaper according to claim 1, wherein the rear portion of the plurality of elastic elements of the rear portion extending in the transverse direction of the diaper are arranged in the longitudinal direction of the diaper at intervals in the extended state, and the elastic elements of the rear part are arranged so that the intervals between the respective two elastic elements of the rear part adjacent to each other with intervals in the longitudinal direction of the diaper are the same interval. 14. The disposable diaper according to claim 1, wherein in the front part a plurality of elastic elements of the front part extending in the transverse direction of the diaper are arranged in the longitudinal direction of the diaper at intervals in the extended state, in the rear part, a plurality of elastic elements of the rear part extending in the transverse direction of the diaper are spaced apart in the longitudinal direction of the diaper in an extended state, and the interval between two elastic elements of the front part adjacent to each other with an interval in the longitudinal direction is equal to the interval between two elastic elements of the front part adjacent to each other with an interval in the longitudinal direction. 15. The disposable diaper according to claim 1, wherein in the front part, a plurality of elastic elements of the front part extending in the transverse direction of the diaper are arranged in the longitudinal direction of the diaper at intervals in the extended state, in the rear part, a plurality of elastic elements of the rear part extending in the transverse direction of the diaper are arranged in the longitudinal direction of the diaper at intervals in a stretched state, wherein when viewed in the longitudinal direction to the locations of the elastic elements of the front and the elastic elements of the rear, the placement of the elastic elements of the front approximately coincides with the locations of the elastic elements of the rear. 16. The disposable diaper according to claim 1, wherein in the front part a plurality of elastic elements of the front part extending in the transverse direction of the diaper are arranged in the longitudinal direction of the diaper at intervals in the extended state, in the rear part, a plurality of elastic elements of the rear part extending in the transverse direction of the diaper are arranged in the longitudinal direction of the diaper at intervals in the extended state, and the positions of the end parts of the elastic elements of the front located next to the side seam are different from the positions of the end parts of the elastic elements of the rear located next to the side seam. 17. The disposable diaper according to claim 1, wherein in the front part a plurality of elastic elements of the front part extending in the transverse direction of the diaper are arranged in the longitudinal direction of the diaper at intervals in the extended state, in the rear part, a plurality of elastic elements of the rear part extending in the transverse direction of the diaper are arranged in the longitudinal direction of the diaper at intervals in the extended state, the position of the end parts of the elastic elements of the front part located next to the side seam coincide with the position of the side seam, and the end parts of the elastic elements of the rear part, located next to the side seam, do not reach the location of the side seam and end in places located next to the side of the side seam, internal in the transverse direction. 18. The disposable diaper according to claim 1, wherein the zone without elastic elements is formed only in the rear, the zone without elastic elements is formed only in the front, or the zone without elastic elements is formed in both the front and rear. 19. A one-time stretchable diaper according to claim 1, wherein the zone without elastic elements has already been formed in a state before wearing the diaper. 20. The disposable diaper according to claim 1, wherein the zone without elastic elements is not formed in the state before wearing the diaper, but in a state where the diaper has been worn, while the elastic elements are stretched so that the end parts of the elastic elements are pulled inward transverse direction, which leads to the formation of a zone without elastic elements.

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