JP5294819B2 - Pants-type wearing article - Google Patents

Description

  The present invention relates to a pants-type wearing article.

  A pants-type diaper in which a waist side and a pair of leg openings are preliminarily defined by joining the belly side and the back side of the exterior body with linear side seal portions extending in the height direction on the left and right sides of the wearer's waist There are diaper covers. Such a pants-type wearing article is effective in terms of intellectual education as well as training for infants to wear pants. For adult diapers, pants-type diapers that can be worn by themselves are suitable for users who are particular about self-reliance by raising their own pants or need such rehabilitation.

  Such a pants-type diaper or the like can be removed by breaking the side seal portion and separating this portion. In this way, for example, when a care recipient such as an infant or an elderly person defecates, the diaper is broken open without being dragged from the thigh to the tip of the foot and left standing. It can be pulled away from the crotch while lying on its back or removed.

As an improvement of the shape of the side seal part of the pants-type diaper or the processing state thereof, a part in which the compression strength is partially changed in the side seal part and a non-joint part, a weak joint part, and a strong joint part are provided is disclosed. (See Patent Document 1). Thereby, it is said that it adheres well to a wearer's skin surface without deteriorating an external appearance, and also has good air permeability and can prevent stuffiness.
Also, there is a pants-type disposable diaper in which a portion that is not joined to the middle in the longitudinal direction (the height direction) of the side seal portion is provided and a gripping portion is formed by extending the outer sheet of the non-joined portion in an ear shape. It is disclosed (see Patent Document 2). With this diaper, the side seal portion is pinched on both sides of the waist to stabilize the shape of the side seal portion, and then the fingertip is inserted into the non-joined portion and moved away from the grip portion, and the side seal portion Can tear.

  In addition, there is a pants-type diaper in which a band material extending in the waistline direction is disposed from the end of the absorbent body on the skin side of the exterior sheet to the vicinity of the waist opening (see Patent Document 3). Specifically, this band material is a pair of long sheet members on the abdominal side and the back side, and the pair of band materials are arranged in an annular shape as a whole around the wearer's waist, and this is described above from the skin side surface of the exterior sheet. It is straddled across the skin surface side of the absorber. The left and right side ends of the pair of band members extend to the side seal portion of the diaper, where they are sandwiched between the side edges of the exterior sheet and joined together with the exterior sheet. By applying the band material extending in the waistline direction, the end of the absorbent body is prevented from being exposed to the skin side in the pants and can be finished in a beautiful shape.

JP 2001-120595 A Japanese Utility Model Publication No. 06-050623 Japanese Patent Laid-Open No. 08-280739

  However, according to the present inventors' confirmation, when removing the diaper to which the above-mentioned band material is applied, the side seal portion is broken and pulled in the same manner as the above-described normal pants-type diaper is removed. If it is attempted to peel off, the outer sheet is broken, but the band material sandwiched and bonded inside may not be broken well. This state will be described in detail with reference to FIG. FIG. 8: is the perspective view which showed typically the state when tearing the side seal part of the conventional diaper seeing from the diaper inner side. When the side seal portion 33 of the conventional pant-type diaper 100 is broken, the outer sheet 1 (abdomen side portion 1a, back side portion 1b) in the vicinity of the left and right sides of the mother, a caregiver, or the wearer is confident with fingers T of both hands. A force is applied in the direction G so that both hands are pulled apart. Then, the joined conventional side seal portion 33 is gradually torn from its upper edge, and is separated into the fractured ventral side seal portion 33a and the fractured back side seal portion 33b. This is performed over the entire length of the left and right side seal portions, and if the side seal portion 33 is bisected, the wearer's crotch portion can be opened by separating the diaper into the ventral side and the dorsal side in the same manner as the unfolded diaper. .

  However, in the conventional pants-type diaper 100 to which this band material is applied, the band material 2 (the abdominal band material 2a and the back band material 2b) is not torn well, and the two are overlapped and joined together in the shape of a palm. (Joint surface) r is maintained. For this reason, for example, an extremely detouring operation is required in which the outer strip 1 is torn and the inner strip 2 is torn alternately little by little. At this time, the exterior sheet 1 and the strip 2 may be peeled and broken in the plane toward the direction p. If the in-plane breakage is greatly spread, the shape of the diaper is greatly deformed. In some cases, the hands of the mother, the wearer, the caregiver, etc. may not be stabilized and the surroundings may be soiled with excrement. Furthermore, attention is drawn to this detour work and the scattering of filth, but if it takes too much time to change diapers, for example, infants who are getting older are not standing still, so they can turn over with filth on them. , It can lead to troubles such as moving. In addition, elderly people may diminish their willingness to rehabilitate due to poor usability.

  In view of the above points, the present invention solves problems peculiar to wearing articles including a pants-type diaper having a band material on the skin surface side of an exterior body, a reinforcing effect, liquid, etc. by applying the band material An object of the present invention is to provide a pant-type wearing article that maintains the advantages of preventing leakage and improving the appearance, and greatly improving the tearability of the side seal after use.

The object of the present invention is to provide a pants-type wearing article having a waist opening and a pair of leg openings, which is composed of an exterior body having an abdominal part, a back part, and a crotch part between the two parts. In the left and right side end portions of the exterior body, the abdominal side portion and the back side portion of the exterior body are overlapped and joined in a palm-like shape and extend in the height direction of the wearer from the waist opening portion to the leg opening portion. A band material extends in the waist direction on the abdominal side or the back side of the portion corresponding to the skin surface side and the waistline of the exterior body, and at least the upper edge and / or the lower edge of the belt material is a side seal portion. It is exposed to the wearer's skin surface, and both left and right end portions thereof are sandwiched and joined to the side seal portions, respectively, and the band width (T ₁ ) from the upper end edge to the lower end edge of the band member is Length in the length direction where the side seal part extends T ₂₎ smaller than _(T 1 _{<T 2),} the strip was achieved by the pants-type wearing article having a break induction notch structure in the vicinity of the portion sandwiched joined to the side seal portion.

  The wearing article of the present invention has a band material on the skin surface side of the exterior body, such as reinforcing effect and prevention of leakage of liquid, etc. by applying the band material, improvement of appearance (appearance of the inner surface of the article), etc. While maintaining the advantages, the tearability of the side seal part after use is extremely high, and it is possible to remove or remove the diaper by breaking this part very easily without the need for detour work or complicated mechanisms. It has an excellent effect.

Hereinafter, a pants-type disposable diaper for adults which is a preferred embodiment of the present invention will be described in detail.
FIG. 1 (a) is a perspective view schematically showing a pants-type disposable diaper 10 as a first embodiment of the present invention as a generally worn shape as seen from the upper left side of the abdomen slightly on the left side of the wearer. FIG. 1B is an enlarged perspective view of a region b (a region surrounded by a circle) in FIG. The diaper of Embodiment 1 has a waist opening Wo and a pair of leg openings Lo, and side seal parts 3 extending in the height direction of the wearer from the waist opening Wo to the leg opening Lo on the left and right sides of the diaper. Have And in this side seal part 3, the left-right both-sides edge part of the abdominal side part 1a of the exterior sheet | seat 1 which comprises an exterior body, and the back | dorsal part 1b are each overlapped and joined in the shape of a palm. Here, overlapping in the form of a palm means that the surfaces having the same function in a pair of sheet materials, that is, in the exterior sheet of the present embodiment, the skin contact surfaces face each other and contact each other. Other functional sheet materials and members may be interposed between the materials. In the first embodiment, the abdomen portion 1a and the back portion 1b of the exterior sheet 1 constituting the exterior body are integrated continuously via a crotch portion 1c (a member portion corresponding to the crotch portion C in the diaper of FIG. 1). The abdomen portion 1a, the dorsal portion 1b, and the crotch portion 1c are made of different sheet materials and joined at a predetermined position, or combined with other functional members, etc. It may be.

  In the illustrated example, the exterior sheet 1 is shown as a single sheet material. However, in the present embodiment 1, the exterior sheet 1 is composed of a liquid-impermeable one or more back sheet and a non-skin surface side liquid surface. It consists of an outer layer nonwoven fabric. A predetermined member such as a string-like elastic member (not shown) is interposed between the back sheet and the outer nonwoven fabric or between the back sheets. Specifically, a waist elastic member and a waistline elastic member that extend in the direction of the waistline are disposed at the edge near the waist opening Wo and the center of the waistline region D, respectively. Due to the elastic members arranged around the waist, the wearer's waist is moderately tightened to provide a good fit. In addition, a string-like leg elastic member is also disposed in the vicinity of the edge of the leg opening Lo so that the wearer's leg base is appropriately tightened to provide good wearability and liquid from this portion. Exhibits leakage prevention.

  The skin surface side of the exterior sheet 1 is composed of pulp fibers, absorbent polymers, and the like stacked on a liquid-permeable fiber sheet (liquid-permeable surface sheet or paper mount) (not shown). An absorbent body 4 in which an absorbent core (not shown) is encased is disposed. A method for attaching the absorbent body 4 to the exterior sheet 1 is not particularly limited. For example, the hot melt adhesive can be applied and bonded in a planar shape, a linear shape, or a spiral shape.

  In the disposable diaper 10 of the present embodiment, the absorbent body 4 has an hourglass shape in which the central portion is constricted, and the exterior sheet 1 disassembled and developed at the side seal portion also has a larger hourglass shape in accordance with the outer shape of the absorbent body 4. It is said that. The exterior sheet 1 includes outer sides of the front and rear side edges in the longitudinal direction of the absorbent body 4 (the wearer's head direction) and outer sides of the left and right side edges in the width direction of the absorbent body 4 (the left and right sides of the wearer). Side edges (flaps) extending in the direction). The left and right or left and right side edge portions of the left and right sides are joined to form the side seal portion 3 as described above. Such a configuration is the same as a normal pants-type disposable diaper.

  The pants-type disposable diaper 10 according to the first embodiment has a pair of strips 2 (abdominal strip 2a, spine) on the skin surface side H of the exterior sheet 1 that forms the exterior body of the diaper waistline D. The side band material 2b) is exposed to the wearer skin side as a whole including the upper edge 2i and the lower edge 2k (hereinafter also referred to as "skin side" or "skin side"), that is, the skin side thereof. Are extended in the longitudinal direction in the waistline direction without being covered with another sheet material or the like (see FIGS. 1 and 2). And the upper edge 2i of this strip | belt material 2 and its periphery (upper end area | region 21) are made into the non-joining free end, and it is more firmly by the skin side surface and the adhesive material of the exterior sheet | seat 1 in the center exterior strip | belt facing area | region 22 of the lower part. And is glued. Further, the band material 2 is in a non-bonded state at a portion (absorber edge covering region 23) straddling the longitudinal edge 4i of the absorber 4 from the lower part to the band material lower edge 2k. The absorbent body 4 is joined to the skin surface of the absorbent body 4 in the entire area 24 facing the absorbent body. In addition, although the form of the diaper belly side was shown in FIG. 2, such member arrangement | positioning and its assembly form are the same also on the back side.

  In this embodiment, it has the absorber 4 which leaves the side edge parts Fa and Fb near the waist opening part from the stomach side part 1a of the exterior sheet 1 to the back side part 1b, and the band material 2 It extends over the absorber 4 from the side edge portions Fa and Fb. And as above-mentioned, it adhere | attaches on the skin surface side surface of the said exterior body side edge part Fa and Fb, and the skin surface side surface of the absorber 4 in the upper end area | region 21 and the absorber edge covering area | region 23 of the strip | belt material 2. In this way, by arranging the band material 2 so as to straddle the front and rear (back side / abdominal side) edge 4i of the absorber 4, the end of the absorber is moderately held, and the mold being worn at that portion It is possible to suppress collapse and peeling and to make the appearance clear. Moreover, it is possible to more reliably prevent the absorbent material from leaking due to the opening of the front and rear (back side / abdominal side) edge 4i of the absorber 4 due to catching of the toes and frictional force with the skin during attachment and detachment. . Furthermore, in the present embodiment, the band 2 is a water-repellent material and hardly permeates liquid or the like. Therefore, the absorbent body 4 is worn for a long time at bedtime or the like and excretes a large amount of urine and absorbs and absorbs it. For example, when the liquid or the like moves from the center of the wearer so that, for example, the wearer turns over and is squeezed to the abdomen or the back, the band member 2 functions as a leak-proof wall to prevent the leakage. It can be effectively prevented.

  Further, by joining the strip 2 in a planar shape in the diaper main body side of the exterior sheet 1 or the absorber 4 as described above, the tensile strength particularly in the joint region 22 with the exterior sheet 1 can be obtained. improves. Thereby, for example, when wearing a diaper for adults, it may be strongly pulled up, and in some cases, the exterior sheet 1 may be forcibly pulled up and damaged, but in the present embodiment, the above-mentioned band material 2 functions as a reinforcing material and can effectively suppress and prevent such breakage. On the other hand, the upper edge 2i is not joined and is not affected by curing by an adhesive or the like, and is soft to the eye, and the hardened cloth material does not irritate and give a sense of itchiness or discomfort. Further, since the upper end region 21 is not joined in the side seal portion 3 as well, there is an effect of improving the tearability of the side seal portion, which will be described later. In addition, the method to join the strip | belt material 2 is not specifically limited, For example, a hot-melt-adhesive can be apply | coated and joined in the planar shape, linear shape, and spiral shape as mentioned above.

  In the diaper of the first embodiment, as described above, the left and right side ends of the stomach side portion 1a and the back side portion 1b of the exterior sheet 1 constituting the exterior body forming the outer shape of the diaper are overlapped and joined in a palm-like shape. ing. And the right and left both ends of a pair of belt material 2 (2a, 2b) arrange | positioned by the skin surface side of the said exterior sheet | seat 1 of the waist part D of a diaper are further left and right of the said exterior sheet | seat 1 (1a, 1b). It is clamped and joined to both ends (see FIGS. 1 and 3). That is, the side seal portion 3 has a four-layer structure in the order of the exterior sheet belly side portion 1a, the belly side belt material 2a, the back side belt material 2b, and the exterior sheet back side portion 1b when viewed from the right side in FIG. When the exterior sheet 1 is viewed as a two-layer structure of a release sheet and an outer nonwoven fabric, it can be said that it has a six-layer structure.) These are collectively joined and integrated by heat embossing. In the portion where the band member 2 is not arranged in the side seal portion 3, a two-layer structure of the ventral side part 1a and the back side part 1b of the exterior sheet excluding the band member 2 (the ventral side band member 2a and the back side band member 2b). It becomes.

In the pants-type diaper 10 of the present embodiment, the band width (T ₁ ) from the upper end edge to the lower end edge of the band material 2 (2a, 2b) is the length that the side seal portion extends in the height direction (T ₂ ) smaller than (T ₁ <T ₂ ). Here, the length (T ₂ ) in the height direction of the side seal part is the same as the width of the waist part D of the diaper, which is the same as that of a general diaper. The ratio (T ₁ / T ₂ ) between the strip width (T ₁ ) and the length (T ₂ ) of the side seal in the height direction is not particularly limited, but is preferably 0.5 or less from the viewpoint of maintaining air permeability around the trunk. The range of 0.1 to 0.4 is more preferable. The band width (T ₁ ) is preferably 20 to 100 mm, and more preferably 30 to 70 mm, from the viewpoint of maintaining air permeability around the waist and preventing the end of the absorber from being turned up.

In the pants-type diaper 10 of the present embodiment, as the relationship between the band width (T ₁ ) and the length in the height direction of the side seal portion (T ₂ ), the side seal portion at the upper edge 3 i side, that is, the waist opening Wo On the side, there is a surplus portion 3y (a portion indicated by a surplus length (T ₃ )) where the band material 2 is not disposed. That is, in the present embodiment, the upper end edge 2i of the strip is positioned below the diaper (in the crotch direction) from the upper end edge 1i of the exterior body, and the exterior body extra portion 1y (see FIG. 1 (see FIG. 2) is defined so that a surplus portion 3y (see FIG. 1) is also defined in the side seal portion 3. In this way, when the strip upper end edge 2i is disposed below the side seal portion upper end edge 3i, when the side seal portion 3 is torn, the breakage induction notch structure provided in the strip upper end edge 2i as it progresses. The cut end gradually reaches the position of the end cut 7a that forms 7 and follows the movement of the side seal portion 3 to move away, and the cut is accurately broken without resistance. For the relationship between the strip width (T ₁ ), the length in the height direction of the side seal portion (T ₂ ), and the excess length, refer to FIG. 6 shown as a diaper development view if necessary.

In the present embodiment, a fracture induction cutting structure 7 is formed in the vicinity of a portion of the ventral band member 2a sandwiched and joined to the side seal portion 3. Here, the breakage induction cut structure has a cut (end cut) 7a formed in the upper edge 2i of the band member 2a, and a perforated cut (center cut) 7c is a non-cut portion 7b. Are intermittently connected to the lower end edge 2k, and the lower end edge 2k is also provided with a cut (end cut) 7a. That is, the breakage induction cut structure 7 of the present embodiment has a plurality of cuts (7a, 7c) and non-cuts on one linear base line (in the figure, the same as the auxiliary line indicating the breakage induction cut structure 7). It is comprised from the notch part (7b). In the present invention, the “cut” includes not only the cut (edge cut) 7a in which the edge of the sheet member is cut, but also the cut (center cut) 7c formed by the center of the sheet member. Use for meaning. The breaking cut structure and the function of the cut will be described in detail later. The upper end cut 7a is a trigger for separating the strip material, and the continuous cut of the central cut 7c further develops the separation, and the lower end. In the portion cut 7a, the tearability of the side seal portion is greatly improved. The end cut 7a is referred to as the upper end cut 7i and the lower end cut 7k, respectively, when the band cut upper edge 2i side and the lower edge 2k side are distinguished.
The fracture incision cutting structure 7 may be formed only on either the ventral strip 2a or the back strip 2b, or may be formed on both the ventral strip 2a and the back strip 2b.

The lengths (La, Lc) of the cuts (7a, 7c) are not particularly limited, but the length of each cut is preferably 1 to 8 mm, and more preferably 2 to 5 mm. By setting it as such a length, it is possible to prevent tearing in the indeterminate direction and to tear reliably in the height direction. In addition, the total length (L _T ) of the cut along the base line extending from the upper end edge 2i to the lower end edge 2k of the band member 2 forming the fracture inducing cut structure 7 (this length L _T is, for example, the cut at the end is 1). If there is one, the length La is the sum (2La) if it is at the upper edge and the lower edge, and 2La + ΣLc when there are a plurality of perforated cuts 7c in the center. (T ₁ ) is preferably 0.5 to 0.9 (0.5 ≦ L _T / T ₁ ≦ 0.9), and 0.6 to 0.8 (0.6 ≦ L _T / T _1). ≦ 0.8) is more preferable. If L _T / T ₁ is too small, the certainty and ease of tearing may be reduced, and if it is too large, inconvenience that the band material separates during wearing tends to occur.

  In the present embodiment, the breakage induction cutting structure 7 is slightly separated from the side seal portion 3 and is located inside the diaper. Although the distance from the side seal part 3 is not particularly limited, the distance Wa from the side seal part 3 is set to 1 to 8 mm so that the tearability of the side seal part is improved and the side seal part 3 is not embedded in the side seal part during manufacturing. It is preferable to set it to 1 to 3 mm. Further, in the first embodiment, as described above, the breaking cut structure 7 is configured by one continuous perforated cut, but by doing so, the direction in which tearing of the side seal portion 3 proceeds The reliability is improved without meandering. Further, in the present embodiment, the perforation of the breaking cut structure 7 is parallel to the direction in which the side seal portion extends in the height direction. However, by doing so, the force when the side seal portion is torn is equalized. It is preferable from the viewpoint that it can be applied and broken straight. In addition, in FIG. 1 demonstrated so far and FIGS. 4-7 mentioned later, in consideration of visibility, the notch which comprises the fracture | rupture notch structure 7 is exaggerated and shown large.

  As shown in FIG. 1B, the side seal portion 3 of the present embodiment has a strong joint portion 9a extending in the width direction intermittently arranged in the longitudinal direction, and more specifically, a large number of match sticks. Are arranged in parallel with a predetermined interval. A non- or weakly joined portion 9b is interposed between the intermittently arranged strong joint portions 9a to form the joined portion 9 of the side seal portion 3 as a whole (in the present embodiment, the joined portion). The area of 9 is the area of the side seal portion 3 as it is.) At this time, although the arrangement | positioning space | interval (k) of the said strong junction part 9a is not specifically limited, It is preferable that it is 5 mm or less, and it is more preferable that it is 1-3 mm.

  The method for forming the strong joint and the non-weak joint as described above is not particularly limited, and examples thereof include the following procedure. The left and right ends of the outer sheet and the belt material around the trunk are overlapped in a palm shape, and a predetermined uneven shape is formed from both the abdomen side surface and the back side surface so as to form the side seal portion 3 here. A pair of joining blocks are formed by heating and pressing. At this time, as the pair of joining blocks used in the joining process, those having the same or different concavo-convex shape are used, and the concavo-convex shape is fitted or narrowed so that the convex parts abut without fitting. . In each of the pair of joining blocks, the convex portions are arranged in a straight line in the longitudinal direction with a predetermined interval therebetween, whereby the side seal portion 3 extending in the height direction can be formed. At this time, for example, if the pressure is reduced by the joining block so that the convex portions are in contact with each other as in the latter case, the portion can be the strong joint portion 9a. The non-weak or weakly bonded portion 9b can be formed in the portion where the recessed portion remains between the recesses. The pressing method for the side seal portion is not limited to the above-described one, and can be performed by appropriately selecting a normal embossing method or the like.

The bonding strength of the strong bonding portion 9a and the non-weak bonding portion 9b is not particularly limited and can be adjusted according to the type and function of the diaper. For example, the bonding strength of the strong bonding portion may be 1000 to 4000 cN / 30 mm. preferable. The non- or weakly bonded portion may be interposed in the strong bonded portion and have a difference in bonding force. For example, in a non-bonded state, the bonding strength is preferably 300 to 2000 cN / 30 mm. It is preferable that the joint strength as the whole joint part 9 shall be 1000-4000 cN / 30mm, for example.
[Joint strength]
In the present invention, “joining strength” means a value measured as follows unless otherwise specified. About each joined part, it cuts out to a suitable magnitude | size and makes it a sample, About the obtained sample, 180 degree peel strength is measured with a tensile tester at 300 mm / min, and this is converted into 30 mm in width. In addition, about a strong junction part and a weak junction part, you may measure using the wide sample produced on the same conditions as each junction part artificially.

FIG. 4 is a perspective view schematically showing the periphery of the region b shown in FIG. 1 as viewed from the inside of the diaper, and FIG. 5 is a perspective view schematically showing a state when the side seal portion is torn. In the diaper according to the first embodiment, as described above, a breakage induction cut structure constituted by a perforated cut is formed in the vicinity of the side seal portion 3 of the ventral strip 2a. At this time, since the ventral band member 2a is disposed below the upper end edge 1i of the exterior body by a length (T ₃ ), the upper end edge 2i of the band member and the breakage induction cutting structure 7 there are provided on the side seal portion. Similarly, it is positioned below the upper end 3i by a surplus length (T ₃ ). And in this embodiment, as shown in the figure, the linear fracture | rupture induction | guidance | derivation cutting structure 7 is formed in the ventral | abdominal band material 2a in parallel with the side seal part 3 extended in a wearer's height direction. In the side seal portion 3, the strong joints 9 a are almost completely sealed in the width direction, and each sheet (exterior sheet belly side portion) covers the entire area in the longitudinal direction of the side seal portion by alternately interposing non- or weak joints. 1a, dorsal side 1b, ventral band 2a, dorsal band 2b) are firmly bonded by pressure bonding.

And when tearing the side seal part 3 so that the diaper 10 of the above-mentioned embodiment is not removed after use or removed and discarded, the fingers T of the wearer or the caregiver are grasped on both sides and moved in the direction of the arrow G. (See FIG. 5). Then, the side seal portion is gradually torn downward from the side seal portion upper end edge 3i on the waist opening side, and is divided into a broken seal portion abdomen side 3a and a broken seal portion back side 3b. Go. And unlike the conventional one (see FIG. 8), when it reaches the upper edge 2i of the strip, the perforated cut that forms the fracture induction cut structure 7 without the strip remaining there. Is broken into an abdominal fracture notch 7t or its fragment member 2t and a dorsal fracture cut 7s or its fragment member 2s, both of which are divided without resistance. In FIG. 5, the state of the fracture at this time is shown so that the shape of the side seal portion is maintained and moved for easy understanding. For example, the virtual trajectory line q ₁ of the upper edge 3 i is an ideal one. Although shown as an arc, in reality, the sheet material is gradually deformed from the inner side of the diaper due to the deformability of the sheet material, and the side seal part surface is slightly kinked outward and downward. It will be peeled off.

In this embodiment, at the time of further peeling, peeling in the surface of the exterior sheet 1 and the band material 2 does not occur, and the break-inducing cutting structure 7 of the band material 2 follows the movement of the exterior sheet 1. Because it is torn, there is no worry that the diaper will lose its shape or the scraps of the internal parts will come out. In FIG. 5, the movement of this part is schematically shown as a movement locus auxiliary line q ₂ .

  Furthermore, in the diaper 10 of the first embodiment, the vicinity of the upper end edge 2i of the strip (the upper end region 21) is in an unbonded state (see FIG. 2), and therefore the vicinity of the upper end edge 2i of the strip is separated from the outer layer sheet 1. However, the band material is easily broken in the cutting direction without being affected by the outer layer sheet 1 at the time of tearing. As a result, the tearability of the side seal portion 3 is further enhanced by the interaction between the non-adhering upper edge 2i and the above-described breakage-inducing notch structure 7, and the initial joining force of the strip-like superposed joining surface of the strip is Despite not being reduced, it becomes easy to peel off due to artificial tearing, for example, there is some variation in bonding force and bonding width at the joint, or a somewhat rough or weak person tears As a result, good and reliable division is possible.

FIG. 6 is a part of a pants-type disposable diaper 20 according to another embodiment (second embodiment) of the present invention, which is disassembled and deployed at the position of the side seal portion and schematically shown from the inside of the diaper belly side. It is a top view. In the second embodiment, the lower end edge 2k of the band member 2a is arranged on the skin side surface of the absorbent body 4 and straddles the end 4i of the absorbent body from the skin side surface of the flap part (Fa) of the exterior body ventral side part 1a. Has been extended to. However, the upper end edge of the band material does not reach the upper end edge 1i of the exterior body, and the width of the band material (T ₁ ) is small (T ₁ <T ₂ ) with respect to the side seal length (T ₂ ). An extra length (T ₃ ) is set from the upper end edge 2i of the strip material to the upper end edge 3i of the side seal portion. And in the side seal part 3, the strong joint part 9a is arranged in parallel so that it may go down from the seal part upper end 3i, and is arranged in a line to this seal part lower end 3k.
In FIG. 6 and the next FIG. 7, the strong joint portion 9a is drawn thicker and larger than that in FIG. 1 and the like, but this is for the sake of illustration and the present embodiment is not construed as being limited thereto. 6 and 7 show plan views of the developed diaper belly side, it is assumed that the rupture guide line structure 7 is provided on the back side as well except that the structure is the same. These are joined at the side seal portions to form an assembled pants-type diaper similar to that shown in FIG. In addition, the code | symbol and names, such as a junction part assembled for convenience of explanation and an understanding, are similarly used in the said expansion | deployment top view.

  In the second embodiment, in the vicinity of the side seal portion 3 of the ventral side band member 2a, a rubbing guidance structure 7 is formed which is formed by a cut in which the both end edges are cut open at the upper and lower edges 2i and 2k on the left and right sides. In other words, the end cuts 7a are provided at the upper and lower edges of the strip 2a, and the upper end cut 7a (7i) to the lower end cut 7a (7k) on both the left and right sides of the strip. The fracture induction notch structure 7 is formed in the shape of a line extending in a straight line. As in the first embodiment described above, the tear guide structure 7 realizes good tearability of the side seal portion. Furthermore, the notch in the edge of the band material triggers the band material breakage, and the band material breaks reliably and easily in the height direction. In addition, as a modification of this embodiment, for example, an embodiment in which an end cut 7a (7i) is formed only in the upper edge 2i of the band member 2 is described. In this case, the fracture inducing cut structure 7 is a linear shape. The end cut 7a (7i) itself becomes the fracture cut structure 7 without being considered as a thing.

  FIG. 7 is a partial plan view schematically showing an underpants-type disposable diaper 30 according to another embodiment (third embodiment) of the present invention developed from the inside of the diaper in the same manner as FIG. In the present embodiment, a pair of breakage induction cutting structures 7 are provided in the vicinity of the side seal portions on both the left and right sides of the band member 2a, and the two breakage induction cutting structure rows 7g and 7h extending in the height direction. Become. Each of the breakage guide cut structure rows 7g and 7h has a perforated cut (end cut 7a, central cut 7c) extending from the upper end edge to the lower end edge of the ventral band member 2a and the non-cut portion 7b are linear. It is constructed in a row.

  The break guide cut structure row 7h is arranged in the vicinity thereof on the side seal portion 3 side, and a preferable range of the distance to the side seal portion is the same as the distance Wa in the first embodiment described above. The breakage induction cut structure row 7g located further inward of the diaper in the vicinity of the breakage induction cut structure row 7h is arranged in parallel via a distance Wb, and a preferable range of the distance Wb is also the above-mentioned Wa. It is the same. Moreover, it is preferable that the perforation-like cuts (7a, 7c) which form both of the breakage induction cut structure rows 7g, 7h are arranged in a staggered manner. Here, the staggered pattern means that the images formed by the cuts in the respective columns are shifted without matching when the cuts are projected in the direction in which the respective columns are orthogonal (the waistline direction in FIG. 7). It is preferable that they are shifted by a half pitch, and it is preferable that the projected images formed by the above-mentioned cuts in each row are continuous without a gap.

  Even when the diaper is continuously produced at such a high speed that fine position adjustment is not easy by adopting the parallel form of the fracture-inducing notch structure rows 7g and 7h as in the third embodiment, the perforation The end cut 7a by processing is surely created by either one of the rows, which is preferable because the tearing reliability is further increased. Also, the side seal portion 3 is not suitable for tearing only by a single row of perforations, for example, when a thick band material is used in an adult diaper, a good side seal portion can be suitably accommodated. A tearability of 3 can be realized.

  As the nonwoven fabric used as the material for the outer layer nonwoven fabric of the exterior sheet and the fiber sheet covering the absorbent body, for example, air-through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, nonwoven fabric by various production methods such as melt blown nonwoven fabric, Examples include woven fabrics, knitted fabrics, resin films, and the like, and a sheet material obtained by laminating and integrating them can be used. From the viewpoint of regularly arranging flexible ridges with good feel and giving a decorative aesthetic appearance, both sheet materials or one sheet material (especially skin when used for the purpose of bringing a composite elastic member into contact with the skin) The forming material of the sheet material forming the surface side) is preferably an air-through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, a melt blown nonwoven fabric, or the like.

  As a material of the band material, from the viewpoint of strength, heat-fusibility, leak-proof property (hydrophobicity), for example, a core-sheath spunbond nonwoven fabric made of a resin such as polyethylene or polypropylene, or a surface made of the resin, A film-like sheet etc. are mentioned. Of these, a spunbonded nonwoven fabric is preferred from the viewpoints of cut formability, tearability, and strength.

The rupture-inducing notch structure of the strip is preferably constituted by one or a plurality of incisions as in each of the above embodiments, and this incision is formed by a processing method such as normal cutting, die cutting, and melting. can do. When this incision is perforated, the continuous form is not particularly limited, such as a straight line, a wavy line, a spiral, etc., but it is preferable to form a notch or a perforated line from the viewpoint of tearability. .
It is preferable that the fracture induction cutting structure is formed only on the belt material and is not formed on the exterior sheet. It is not preferable to form a breakage-inducing cut structure on the exterior sheet because it increases the possibility that a wearer such as an infant will break in an interesting manner during use and lowers the leak-proof property.

As a material of the elastic member, a normal elastic material used for absorbent articles can be used. For example, as a material, synthetic rubber such as styrene-butadiene, butadiene, isoprene, neoprene, natural rubber, EVA, stretchable polyolefin Polyurethane and the like can be mentioned, and the form thereof is such that the cross-section is rectangular, square, circular, polygonal or other thread-like or string-like (flat rubber etc.), or multifilament type thread-like it can.
It is.

  In each of the above embodiments, a pants-type diaper is shown as an example of the wearing article of the present invention, but a pants-type diaper cover that is used with the absorbent main body disposed on the skin surface side is also preferable. The absorbent main body is not particularly limited as long as it absorbs excreted urine and the like, and examples thereof include an absorbent pad such as a urine collecting pad. The absorbent pad includes, for example, a liquid-permeable surface sheet, a liquid-impermeable leak-proof sheet, and a liquid-holding absorber interposed between the two sheets, and is formed in a vertically long shape that is rectangular in plan view. Can be mentioned. Preferably, a pair of left and right solid guards are formed on both sides of the absorbent pad in the longitudinal direction, and each solid guard is for forming a solid guard having a solid guard elastic member on both sides of the absorbent pad in the longitudinal direction. It is preferable that the sheet material is disposed. The longitudinal direction of such an absorbent pad is passed from the wearer's back side to the stomach side through the crotch, and the liquid-permeable sheet side of the pad is disposed so as to contact the wearer's skin. It is preferable to wear the diaper cover so as to cover the absorbent pad.

  The pants-type wearing article of the present invention is a concept including general wearing articles having a pant-type structure such as sanitary shorts and shorts-type napkins, in addition to the above-described pants-type diapers and diaper covers. This pants-type wearing article may be for infants or for adults. Among these, a pants-type diaper for adults is preferable from the viewpoint of the strength of the diaper.

FIG. 1A is a perspective view schematically showing a pants-type disposable diaper as a first embodiment of the present invention as viewed from the abdominal side as a generally worn shape, and FIG. It is an expansion perspective view of the area | region b of (a). It is an expanded sectional view of the II-II line cross section shown in FIG. It is an expanded sectional view of the III-III line cross section shown in FIG. It is the perspective view which showed typically the periphery of the area | region b shown in FIG. 1 seeing from the diaper inner side. It is the perspective view which showed typically the state when tearing the side seal part (part corresponding to the part shown in Drawing 4) of the diaper of a 1st embodiment in the present invention. It is the partial top view which developed and showed the underpants type disposable diaper of another embodiment (2nd embodiment) in the present invention from the inside of a diaper. It is the partial top view which developed and showed the underpants type disposable diaper of another embodiment (3rd embodiment) in the present invention from the inside of a diaper. It is the perspective view which showed typically the state when tearing the side seal part of the conventional diaper seeing from the diaper inner side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Exterior sheet 2 Band | bowl material 3 Side seal part 4 Absorber 7 Breaking induction cutting structure 9 Joint part 10, 20, 30, 100 Disposable diaper

Claims (6)

A pants-type wearing article comprising a waist opening and a pair of leg openings, comprising an exterior body having a ventral part, a back part, and a crotch part between the two parts,
Side seal portions extending in the wearer's height direction from the waist opening portion to the leg opening portion at the left and right side end portions of the exterior body, wherein the abdominal portion and the back portion of the exterior body are overlapped and joined together. None,
On the skin side of the exterior body and on the belly side or back side of the portion corresponding to the waist, a belt material extends in the waist direction, and at least the upper edge and / or the lower edge of the belt material is on the wearer skin surface side. And the right and left side ends are sandwiched and joined to the side seal part,
The band width (T ₁ ) from the upper edge to the lower edge of the band is smaller than the length (T ₂ ) in the height direction in which the side seal portion extends (T ₁ <T ₂ ),
The strip has a break-inducing notch structure in the vicinity of the portion sandwiched and joined to the side seal portion , and the upper end edge of the strip and its periphery are unjoined free ends. Goods.   The underpants-type wearing article according to claim 1, wherein the fracture-inducing cut structure is a cut formed on at least an upper end edge or a lower end edge of the strip.   The pants-type wearing article according to claim 1 or 2, wherein the breakage-inducing cut structure is a perforated cut extending from an upper end edge to a lower end edge of the band member.   The underpants according to any one of claims 1 to 3, wherein the break-inducing cut structure is a structure in which two or more rows of perforated cuts extending from an upper end edge to a lower end edge of the band member are arranged side by side. Mold wearing article. The rupture-inducing cut structure is constituted by one or more cuts along a base line extending from the upper end edge to the lower end edge of the strip, and the total length (L _T ) of the cuts in the base line is the base line portion. The underpants type wearing article according to any one of claims 1 to 4, which is 0.5 to 0.9 (0.5 ≦ L _T / T ₁ ≦ 0.9) of the band width (T ₁ ). . The underpants type according to any one of claims 1 to 5, wherein the breaking guide cutting structure is formed at a position of 1 to 8 mm toward the inside of the diaper width direction from the side seal portion in the band member. Wearing articles.

Images