JP5203158B2 - Pants-type wearing article - Google Patents

Description

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

  It has a linear side seam portion that extends in the height direction on the left and right sides of the wearer's waist, and the abdomen side and back side of the exterior body are joined at this side seam portion, and a waist opening and a pair of legs like the brief pants There is a pants-type diaper or diaper cover in which an opening is previously defined. 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 is usually not lowered to the tip of the foot so that the brief pants are removed after use, but the side seam portions on the left and right sides of the wearer described above are torn and separated. 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 or processing state of the side seam part of the pants-type diaper, there is disclosed a part in which the compression strength is partially changed in the side seam part and a non-joined part, a weakly joined part, and a strongly joined part are provided. (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 not joined in the middle of the longitudinal direction (the height direction) of the side seam 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, pinch the gripping part on both sides of the waist to stabilize the shape of the side seam part, and then insert the fingertip into the non-joined part and move it away from the gripping part. Can tear.

  In addition, there is a pants-type diaper that uses a band extending in the waistline direction from the upper and lower (abdominal / dorsal) ends of the absorbent body on the skin side of the exterior sheet to the vicinity of the waist opening (patent) Reference 3). Specifically, the band material is a pair of long sheet members on the abdominal side and the back side, and the pair of band members are arranged in a belly shape around the waist of the wearer, and this is absorbed from the skin side surface of the exterior sheet. It straddles the skin surface side of the body. The left and right side ends of the pair of strips extend to the side seam portion of the diaper, where they are sandwiched between the side ends 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 confirmation of the present inventors, when removing the diaper to which the above-mentioned band material is applied, the side seam 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. 13: is the perspective view which showed typically the state when tearing the side seam part of the conventional diaper seeing from the diaper inner side. When the side seam portion 33 of the conventional pants-type diaper 100 is broken, the mother, an assistant, or the wearer's confidence is picked with the fingers T of both hands of the exterior sheet 1 (abdominal side portion 1a, back side portion 1b) in the vicinity of the left and right sides. Then put the force in the direction G so that both hands are separated. Then, the joined conventional side seam portion 33 is gradually torn from its upper edge, and is separated into the ventral side seam portion 33a after fracture and the back side seam portion 33b after fracture. This is performed over the entire length of the side seam portions on both the left and right sides, and if the side seam portion 33 is divided into two, the wearer's crotch portion can be opened by separating the diaper into an abdomen and a dorsal side in the same manner as a deployable 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, the back band material 2b) is not torn well, and the two are joined in a palmed state (joint surface) r. Will be 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 reduce their willingness to rehabilitate due to the same ease of use as described above.

  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 above object of the present invention is 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. The side seam extending from the waist opening portion to the leg opening portion with the wearer's height direction as the longitudinal direction, wherein the left and right side end portions of the abdominal side portion and the back side portion of the exterior body are overlapped and joined together. The band material is exposed to the wearer's skin side on the belly side or the back side of the article waistline portion on the wearer's skin surface side of the exterior body. In the three-pronged region where the left and right side ends of the band material are sandwiched and joined to the exterior body by side seam portions, respectively, and the upper edge or the lower edge of the band material abuts the side seam portion. The side seam of the joint An underpants-type wearing article having a joint end biased portion in which the inner end in the width direction is located on the outer side in the side seam portion width direction of the side seam portion in the longitudinal direction on the upper side or the lower side of the joint portion. Achieved by.

  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 is a perspective view schematically showing a pants-type disposable diaper 10 as a first embodiment according to the present invention as a generally worn shape as seen from the upper left side of the wearer. The diaper of Embodiment 1 has a waist opening Wo and a pair of leg openings Lo, and extends from the waist opening Wo to the leg opening Lo on the left and right sides of the diaper, with the length direction of the wearer as the longitudinal direction. It has a seam part 3. “Seam” means a joint, and includes a form with continuous joints and a form in which a plurality of joints and non-joints are arranged intermittently. And in this side seam 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 palm state. Here, overlapping in the shape of a palm means that the surfaces having the same function in a pair of sheet materials, that is, in the exterior sheet of this embodiment, the skin contact surfaces face each other and contact each other. Another functional sheet material or member may be interposed between the sheet materials. In the first embodiment, the abdomen side portion 1a and the back side portion 1b of the exterior sheet 1 constituting the exterior body are an integrated sheet that is continuous via a crotch portion 1c (a member portion corresponding to the crotch portion C in the diaper of FIG. 1). Although it is made of a material, the abdomen portion 1a, the back portion 1b, and the crotch portion 1c are made of different sheet materials and are joined at a predetermined position or combined with another functional member or the like. Or you may.

  In the illustrated example, the exterior sheet 1 is shown as a single sheet material in consideration of the visibility of the main part. However, in the present embodiment 1, the exterior sheet 1 is a wearer skin surface side (hereinafter, simply referred to as “sheet material”). One or more liquid-impermeable back sheets of “skin side” or “skin side” and the wearer's non-skin side (also simply referred to as “non-skin side” or “non-skin side”) ) Outer layer non-woven 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 seam portion 3 is also an hourglass larger than that according to the outer shape of the absorbent body 4. It is made into a shape. 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 end portions of the left and right or front and rear side edges are joined to form the side seam 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) has its upper edge 2i and lower edge 2k exposed to the skin surface side, that is, the skin surface side is further extended in the waist direction without being covered with another sheet material or the like. (See FIGS. 1 and 2). And the upper end 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 the skin surface side surface and the adhesive material of the exterior sheet | seat 1 in the center exterior strip | belt facing area | region 22 of the downward | lower It is firmly bonded. 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 in a back side edge part.

  In this embodiment, it has the absorber 4 extended from the stomach side part 1a of the exterior sheet 1 to the back side part 1b, leaving the side edge part vicinity of the waist opening part, and the said strip | belt material 2 is the said side edge. It extends over the absorber 4 from the parts 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. Thus, by arranging the band 2 so as to straddle the front and rear (back side / abdominal side) edge 4i of the absorbent body 4, the absorbent body end portion is appropriately pressed, and the part in use is being worn. It is possible to suppress the loss of shape and peeling, and to make the appearance clear. In addition, it is possible to reliably prevent the absorbent material from leaking due to the opening of the front and rear (back side / abdominal side) edge 4i of the absorbent body 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 with an adhesive or the like, is soft to the eye, and does not easily give a sense of itchiness or discomfort. Furthermore, since the upper end region 21 is not joined in the side seam 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 end portions 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 to each other. Has been. 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 seam portion 3 has a four-layer structure in the order of the exterior sheet abdominal side portion 1a, the abdominal side strip material 2a, the back side strip material 2b, and the exterior sheet back side portion 1b as 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 material 2 is not arranged in the side seam 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 material 2 (abdominal side band material 2a, back side band material 2b). It becomes.

  In the present embodiment, the elongated strip 2 (2a, 2b) is arranged so as to extend in the waistline direction and reach both the left and right side seam portions 3, but the upper edge exposed on the skin surface side. 2i and the lower end edge 2k extend to the left and right and abut against the side seam portion to constitute a bag-shaped biased portion 3u in the trident region. The three-pronged region, that is, the side seal portion 3 forms a “T” horizontal bar, and the upper end edge 2i or the lower end edge 2k of the strip 2 forms a vertical bar “T”. The three-pronged region is formed. In the portion shown in FIG. 4, the upper end edge 2 i of the ventral band material 2 a and the side seam portion 3 constitute a “T” -shaped three-pronged region that rolls over to the right. The same applies to the back side member 2b. Hereinafter, this embodiment will be described in more detail based on FIG. 4 in which the periphery of the bag-shaped biasing portion 3u (hereinafter referred to as “bag-shaped portion”) is enlarged. As is clear from the above description, the “three-pronged region” does not indicate only the intersection where the upper end 2i or the lower end 2k of the strip 2 abuts on the side seam portion, but a T-shaped portion in the vicinity thereof. Is also included.

In the present embodiment, the joint width (t ₁ ) in the side seam width direction in the three-pronged region where the upper edge 2i of the strip abuts is the joint width (t ₂ ) on the upper side and the lower side in the longitudinal direction of the joint. Has been smaller than. That is, the junction width (t ₁ ) corresponds to a value obtained by subtracting the width (t ₃ ) of the junction extending from the upper and lower junction widths (t ₂ ), and the inequality (t ₁ <t _2). ). As a result, the side seam portion 3 in the three-pronged region defines a bag-like biased portion 3u that is rolled over so that the inlet 3s and the bottom 3t face the left and right sides. In other words, it is biased so that the inner end position S ₂ of the joint portion 9s of the bag-like portion 3u is inside the inner end position S ₁ of the joint 9t at its upper or lower side (see FIG. 4). Also shows a different and distinguishable location for explaining the inner end position S ₂ of the bottom 3t and junction 9s of the bag-like portion in Fig.

In this way, the narrow joint portion 9s (narrow width / strong joint portion 9b, narrow non-joint portion or weak joint portion 9d) in the trident region is directed outward in the width direction (rightward in FIG. 4). The bottom 3t, and the upper and lower large joint portions 9t (wide / strong joint portion 9a, wide non-joint portion or weak joint portion 9c) form both side edges 3v and 3w. A bag-like portion 3u facing leftward (in FIG. 4, left direction) is created in the side seam portion 3. However, the inner end position S ₂ of the joint portions in the bag portion 3u, in part, often long deviate from the inner end position S ₁ of the joint portion of the upper or lower side, with the present embodiment Differently, for example, it may be gradually biased.

  By forming the bag-like portion 3u as in the above-described embodiment, the band member 2 is surely easily peeled off when the side seam portion is torn. That is, the bag-like portion 3u is formed as in the present embodiment, and the upper end edge 2i or the lower end edge 2k of the band member is formed so that the upper end edge 2i or the lower end edge 2k of the band member is positioned therein to exhibit a sufficient effect. It is preferable to cross the bag-like part 3u. On the other hand, when the upper end edge 2i or the lower end edge 2k of the band material is disposed at a position sandwiched between the upper and lower bag-shaped portions, the tearability may be rather deteriorated.

  The length in the height direction of the bag-like portion 3u is preferably 5 to 50 mm, more preferably 10 to 30 mm from the viewpoint of tearability. Further, from the viewpoint of tearability, it is preferable that the height direction position in the side seam portion 3 of the upper edge 2i or the lower edge 2k of the strip corresponds to a position of 20 to 80% of the height direction of the bag-shaped portion 3u. More preferably, it corresponds to a position of 40 to 60%. From the viewpoint of improving the tearability of the side seam and preventing peeling during use, the value obtained by dividing the “total length in the bag-shaped portion 3u” by the “side seam length” is 0.05 to 0.4. Preferably, 0.1 to 0.3 is more preferable. The length in the height direction of the bag-like portion 3u means the distance between the wide and strong joints 9a sandwiching the bottom 3t, and the wide and strong joints on the way to the wide and strong joints 9a from the bottom 3t. It is preferable that there is no joining part exceeding the joining length of the part 9a. The bottom 3t defined by the inner end portion of the joint portion in the bag-like portion is preferably composed of a plurality of joint portions from the viewpoint of both improvement of tearability of the side seam and prevention of peeling during use.

In the present embodiment, the joint portion 9 (9t, 9s) extends toward the inside of the side seam portion width direction outer edge 3r (FIG. 4), but the joint width (t ₁ ) and (t ₂ ), When the side seam portion is elastic and stretchable, or when the vicinity of the outer edge 3r in the side seam width direction is not joined, the outgoing joint width (t ₃ ) is extended to the outer edge 3r. Measure in the wet state. That is, the joining widths (t ₁ ) and (t ₂ ) are the width direction to the innermost end positions S ₁ and S _{2 in} the width direction of the joining parts 9t and 9s with reference to the outer edge 3r in the width direction among all the joining parts. Parallel distance. That is, if arranged end position S ₂ so as to form the bottom 3t of narrow junction portion 9s of the trifurcation region towards the width direction outward, further bonding state in the width direction outwardly of the bottom 3t particularly limited Not. For example, it may be a strong joint portion (shown as the strong joint portion 9z in the modified example of FIG. 4) biased in the arrangement as shown in FIGS. 4A (a) and (b). In these modified examples, As shown in the figure, widths t ₁ , t ₂ and t ₃ are defined. However, it is preferable that the outermost position in the width direction is arranged in a straight line along the outer edge 3r in the joint, since the uneven portion of the unjoined sheet is few and the appearance is good. In addition, from the viewpoint of tearability and texture improvement, it is preferable that the side seam portion is constituted by an array of a strong joint portion provided intermittently in the longitudinal direction and a weak joint portion interposed therebetween, More preferably, the weakly joined portion is a non-joined portion.

  In FIG. 4, only the bag-shaped portion 3 u on the upper right side as viewed from the stomach side of the diaper is shown and described (see also FIG. 1). However, in the diaper of this embodiment, the same bag-shaped portion 3 u has the left and right side seam portions. A total of four are created in each of the three, two on the upper side and two on the lower side. These four bag-like parts 3u correspond to the positions of the left and right ends of the upper edge 2i and the lower edge 2k of the band 2 (abdominal band 2a, back band 2b), and the joint surface of each side seam is It is designed to have a “W” shape that rolls down in front view as a whole (see FIG. 1. If necessary, it is another embodiment, but has a similar roll-over W-shaped joint surface. 12).

The joint width (t ₁ ) of the narrow joint portion 9 s and the wide joints on the upper and lower sides thereof in the three-pronged region of the strip material edges (upper edge 2 i, lower edge 2 k) and side seam portion 3. the ratio of the joint width (t ₂₎ of the portions 9t _(t 1 _/ t ₂₎ may be appropriately determined in consideration of the strength of the force to break the size and the portion of the diaper, such as those for adults If it is, it is preferable that it is 0.2-0.8, and it is preferable that it is 0.4-0.6.

  As shown in FIG. 4, the side seam portion 3 of this embodiment has strong joints 9 a and 9 b extending in the width direction intermittently arranged in the longitudinal direction. Specifically, a large number of match sticks are arranged. It arrange | positions so that it may continue in parallel at predetermined intervals. And the non-joint part or weak joint part 9c, 9d is interposed between the strong joint parts 9a, 9b arranged intermittently, and the side seam part 3 is comprised as a whole. (The region of each joint 9a, 9b, 9c, 9d may be functionally partitioned, and the non-joint or weak joints 9c, 9d are strengthened around the adjacent strong joints 9a, 9b, and from there It may be an inclined bonded state in which the bonding force becomes weaker or non-bonded as it goes away, that is, in the middle of the non-bonded part or weakly bonded part. At this time, the arrangement interval (k) between the strongly bonded portions 9a and 9b is not particularly limited, but is preferably 5 mm or less, and more preferably 1 to 3 mm.

  Although the formation method of the above strong junction part and a non-joint part or a weak junction part is not specifically limited, For example, the following procedures are mentioned. The left and right ends of the outer sheet and the belt material around the trunk are overlapped with each other, and a predetermined uneven shape is formed from both the abdomen side surface and the dorsal side surface so as to form the side seam 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, thereby forming the side seam portion 3 extending in the height direction. At this time, for example, if the pressure is narrowed by the joining block so that the projections are in contact with each other as in the latter case, the portion can be the strong joints 9a and 9b, and when the joining block is confined to the opposite side In addition, the non-joined portions or the weakly joined portions 9c and 9d can be formed in the portions where the spaced portions remain between the concave portions.

  The size and interval of the projections of the joint block and the length in the width direction are arbitrary depending on the desired strong joint and weak-non-joint configuration. And the length of the convex part of a joining block is shortened corresponding to the narrow joint part 9s in the part which should make the bag-like part 3u, and a convex part is formed in the part which forms the wide joint part 9t in the upper side and the lower side. By making the length longer, the side seal portion having the configuration as in the first embodiment can be obtained. The pressing method of the side seal part is not particularly limited, and can be performed by appropriately selecting a normal embossing method or the like.

The bonding strength of the strong bonding portions 9a and 9b, non-weak bonding portions 9c and 9d 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 portions is 1000 to 4
000 cN / 30 mm is 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. 5 is a perspective view schematically showing the periphery of the region IV shown in FIG. 1 as viewed from the inside of the diaper, and FIG. 6 is a perspective view schematically showing the state when the side seal portion is torn. . In the diaper of the first embodiment, as described above, in the region IV of FIG. 1, that is, above the side seal portion on the left side of the wearer of the diaper, the upper end edge 2i of the strip 2 extends and hits the side seal portion. A bag-like part (non-joining part) 3u is created in the part region. In FIG. 5, the bag-like portion 3u is shown as viewed from the inlet 3s side. As shown in the figure, the bag-like portion 3u of the present embodiment has a pocket-like shape with the entrance 3s facing the inside of the diaper, as if a long wallet was set up and a mouth was opened. The bag-shaped portion 3u has a wide joint portion 9t having a large width at the side joint portion on the upper outer side and the lower outer side in the height direction so that the side seam portion 3 is seen in the width direction and is sealed so much. 9s, the narrow joint portion 9s seals up to the outer edge of the side seal portion in the width direction. In this way, the respective sheets (exterior sheet abdominal side portion 1a, back side portion 1b, abdominal side band material 2a, and back side band material 2b) are firmly bonded by pressure bonding.

And when tearing the side seam part 3 so that the diaper 10 of the present 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. 6). Then, the side seam portion is gradually torn downward from the side seam upper end edge 3i on the waist opening side, and is divided into a broken seam portion abdomen side 3a and a broken seam portion back side 3b. Go. And unlike the conventional one (see FIG. 13), even if it approaches the portion of the upper edge 2i of the strip, the ventral strip 2a and the back strip 2b are not left unbonded there. Because they are easy to tear, both are divided smoothly. Incidentally, the state of breakage when the 6, shows as moves is maintained the shape of the side seams for ease of understanding, for example, the ideal virtual trajectory q ₁ of the upper edge 3i 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 seam surface is slightly kinked outward and downward. It will be peeled off.

In the present embodiment, the diaper is further peeled off in the plane between the exterior sheet 1 and the band member 2 and the band member 2 is torn following the movement of the exterior sheet 1 during the separation. There is no worry of losing shape or scraps of internal parts. Such an action is due to the bag-shaped portion 3u created in the side seam portion. How moving away pulling this part in FIG. 6, indicated by auxiliary line q ₂ showing a movement trajectory of the ends of the inlet 3s of the bag-like portion 3u. Actually, the sheet material is gradually twisted from the inside of the diaper to the outside, and further torn from the upper side to the lower side of the diaper, while the sheet material is twisted with respect to the illustrated one.
It is preferable that an elastic material is disposed along the width direction so as to cross the bag-like portion 3u in order to open the bag-like portion 3u in a natural state and improve tearability.

  Furthermore, in the diaper 10 of the first embodiment, the vicinity of the upper end edge 2i (the upper end region 21) of the strip is in a non-bonded state (see FIG. 2), so that the flexibility is improved and the strips are easily separated. . Further, when an adhesive is used in the vicinity of the upper end edge 2i of the strip, there is a disadvantage that the strips are joined and peeled off due to the bleeding of the adhesive. Such inconvenience can be avoided. As a result, the tearability is further enhanced by the interaction between the non-adhering upper edge 2i and the bag-like portion 3u described above, and the initial joining force is not reduced in the joining surface of the band material in the palm state. It is easy to peel off due to artificial tearing.For example, even if there is some variation in bonding force and bonding width at the joints, or even if a person with weak or weak force tears, the separation is good and reliable. Is possible.

  FIG. 7 is a partial plan view schematically showing the pants-type disposable diaper 20 according to another embodiment (second embodiment) of the present invention in a disassembled state at the side seam portion and viewed from the inside of the diaper. is there. In the second embodiment, the band material 2a extends from the skin side surface of the absorbent body 4 to the skin side surface of the exterior body abdominal side portion 1a so as to reach the upper end edge 1i of the exterior body as it is. It is arranged. That is, the strip is extended to the upper end edge of the diaper forming the waist opening Wo. And in the side seam part 3, the wide width | variety strong junction part 9a is arranged so that it may descend | fall from the exterior body upper end edge 1i, and is extended to the vicinity of the strip | belt material lower end edge 2k. In the vicinity of the lower end edge 2k of the strip, that is, in the vicinity of the trident region where the lower end edge 2k extends to the left and right and abuts against the side seam portion, narrow and strong joints 9b are arranged in a row on the inner side of the diaper. A bag-like portion 3u is configured. Then, the wide and strong joint portions 9a are arranged again in the portion without the strip material that goes down beyond the bag-like portion 3u (in this figure, since it is greatly modeled, one joint is formed at the lower end 3k portion of the seam portion). Although only the portion 9a is illustrated, it is assumed in the present embodiment that a plurality of joint portions 9a are disposed here, and a sign is provided between the strong joint portions 9a and 9b. Although not shown, a non-weak junction is arranged, and such a large schematic is the same in the following Figures 8 to 12. In addition, in FIGS. Although it is shown, it is premised that the back side has the same structure, and this is joined by a side seam portion to form an assembled pant-type diaper similar to that in Fig. 1. For convenience of explanation and understanding Symbols for bag-like parts and joints that are assembled more Fine name, is used also in the developed plan view.).

  In other words, in the second embodiment, the upper bag-shaped portion 3u of the first embodiment is not provided, but the lower bag-shaped portion 3u in the band material lower edge 2k and the three-pronged portion region of the first embodiment is provided. One side seam portion is provided. By using the diaper of the second embodiment having the side seam portion having the configuration shown in FIG. 7 as described above, the front and back (back side) of the belt member 2 and the absorbent body 4 while improving the tearability from the leg opening Lo. / Abdominal side) The covering area of the edge 4i can be suppressed to a minimum, and particularly in the case of a long absorbent body design, the hydrophilic area of the absorbent body that greatly contributes to the absorbent performance can be greatly expanded. . Further, by forming the strip 2 by folding the outer layer nonwoven fabric, the processing equipment can be simplified and the production cost can be reduced as compared with the case where the strip 2 is supplied separately.

  FIG. 8 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 second embodiment, the configuration of the upper end edge 2i of the strip 2a and the bag-like portion 3u in the three-pronged region is the same as in the first embodiment. In the third embodiment, the band member 2a extends to the side seam portion lower end edge 3k, and therefore there is no lower bag-like portion 3u, that is, one bag-like portion 3u on the upper side of one side seam portion. Is the created structure. By setting it as such a diaper of this Embodiment 3, air permeability can be improved in order not to arrange | position a belt | band | zone material to waist circumference vicinity, improving the tearability from waist opening part Wo.

  FIG. 9 is a partial plan view schematically showing an underpants-type disposable diaper 40 according to another embodiment (fourth embodiment) of the present invention developed from the inside of the diaper. In the fourth embodiment, the wide and strong joints 9a are lined downward from the positions where the side seam upper end edge 3i is located on both the left and right sides of the upper end edge 1i of the exterior body. It is switched to the strong joint 9b. The narrow and strong joints are continuously arranged across the entire width w of the strip 2a and further beyond the strip portion, and then the wide and strong joints 9a again at the lower side edge 3k of the side seam portion. It is switched and arranged. That is, in the present embodiment, a bag-like portion 3u is created that extends greatly in the height direction beyond the entire width w of the strip. By setting it as the diaper of this this Embodiment 4, the rigidity of the junction site | part by which the strip | belt material 4 is arrange | positioned can be reduced, and a softness | flexibility can be improved.

  FIG. 10 is a partial plan view schematically showing an underpants-type disposable diaper 50 according to another embodiment (fifth embodiment) of the present invention developed from the inside of the diaper. In the fifth embodiment, two bag-like portions 3u on the upper side and the lower side are arranged in each side seam portion, and this is the same as in the first embodiment. On the other hand, unlike the first embodiment, in the fifth embodiment, the wide-width / strong joint portion 9a is composed of two narrow-width / strong joint portions 9f, which are configured by serial connection in the side seam width direction. ing. In other words, there is a non-weakly bonded portion 9e that is not strongly heated and narrowed at the center of the wide bonded portion 9a, thereby forming a broken line-like linear emboss. By setting it as the diaper of this Embodiment 5, the rigidity of the whole joining site | part including the joining site | part by which the strip | belt material 4 is arrange | positioned can be reduced, and a softness | flexibility can be improved. Each linear embossing of the broken line-shaped linear embossing may be arranged linearly along the product longitudinal direction, or may be arranged in a staggered manner.

  FIG. 11 is a partial plan view schematically showing an underpants-type disposable diaper 60 according to another embodiment (sixth embodiment) of the present invention developed from the inside of the diaper. In the sixth embodiment, the configuration of the band member 2a and the bag-like portion 3u in the three-pronged region is the same as that of the first embodiment, and two upper and lower bag-like portions 3u are created in each side seam portion 3. ing. However, in the fourth embodiment, the joint portion of the side seam portion is continuously arranged only by the strong joint portion (wide / strong joint portion 9a, narrow / strong joint portion 9b). The part is tightly heated and tightly sealed without any gaps. By setting it as the diaper of this Embodiment 6, peeling at the time of use of a side seam part can be reliably prevented, improving the tearability of a side seam part.

  FIG. 12 is a partial plan view schematically showing an underpants-type disposable diaper 70 according to another embodiment (seventh embodiment) of the present invention developed from the inside of the diaper. In the seventh embodiment, the configuration of the strip 2a and the bag-like portion 3u in the three-pronged region is the same as that of the first embodiment, and two upper and lower bag-like portions 3u are created in each side seam portion 3. ing. However, in the seventh embodiment, the strong joints (the wide / strong joint 9a and the narrow / strong joint 9b) of the side seam are formed in a shape bent in a “V” shape. Therefore, although not shown by the code | symbol corresponding to this, the non-or weak junction part is also made into "V" shape. By setting it as such a diaper of this Embodiment 7, the balance of tearability, joining strength, a softness | flexibility, etc. can be adjusted suitably. In addition to the shape in which the strong joint portion of the side seam portion is bent in a “V” shape, the shape of the strong joint portion of the side seam portion, such as a “→” shape or a “/” shape, can be appropriately set.

  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 is preferred.

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.

BRIEF DESCRIPTION OF THE DRAWINGS It is the perspective view which showed typically the underpants type disposable diaper as 1st Embodiment in this invention as a shape of a wearing condition from the abdominal side. 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 expanded and showed the periphery of the area | region IV shown in FIG. It is the partial top view which showed the side seam part as a modification of 1st Embodiment typically developing the underpants type disposable diaper from the inside of a diaper. It is the perspective view which showed typically the periphery of the area | region IV shown in FIG. 1 seeing from the diaper inner side. It is the perspective view which showed typically the state when tearing the side seam part (part corresponding to the part shown in FIG. 5) of the diaper of 1st Embodiment in this 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 partial top view which developed and showed the underpants type disposable diaper of another embodiment (4th 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 (fifth 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 (sixth 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 (seventh 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 seam part of the conventional diaper seeing from the diaper inner side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Exterior sheet 2 Band material 3 Side seam part 3r Outer edge 3s Bag-like part entrance 3t Bag-like part bottom 3u Bag-like part (non-joining part) 3u
3v, 3w Bag-shaped part side edge 3i Side seam part upper end edge 3k Side seam part lower end edge 4 Absorber 9 Joint part 9a Wide wide strong joint part 9b Narrow wide strong joint part 9c Wide wide weak joint part 9d Narrow narrow weak joint part 9s Narrow Wide joint 9t Wide joint 10, 20, 30, 40, 50, 60, 70, 100 Disposable diapers

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,
Left and right side end portions of the abdominal side portion and the back side portion of the exterior body are overlapped and joined to each other, and a side seam portion extending from the waist opening portion to the leg opening portion with the length direction of the wearer as a longitudinal direction is formed. ,
On the skin side of the outer skin of the outer body of the exterior body, on the belly side or back side of the waist part of the article, the band material extends in the waist direction with its upper edge and / or lower edge exposed to the skin side of the wearer The left and right end portions of the band member are sandwiched and joined to the exterior body by side seam portions,
The end of the side seam portion in the width direction of the joint portion in the three-pronged region where the upper end edge or the lower end edge of the strip material abuts on the side seam portion is the side of the joint portion on the upper side or the lower side in the longitudinal direction of the joint portion. A pants-type wearing article having a joint end biased portion located on the outer side in the side seam portion width direction than the inner end in the seam portion width direction. The ratio (t ₁ / t ₂ ) between the junction width (t ₁ ) and the upper or lower junction width (t ₂ ) in the three-pronged region between the strip material edge and the side seam portion is 0.2 to The pants-type wearing article according to claim 1, which is 0.8.   The underpants-type wearing article according to claim 1 or 2, wherein the side seam portion is constituted by an array of a strong joint portion provided intermittently in the longitudinal direction and a weak joint portion interposed therebetween.   The pants-type wearing article according to claim 1 or 2, wherein the side seam portion is configured by arranging a plurality of joint portions and a non-joint portion provided therebetween.   The pants-type wearing article includes an absorbent body that extends from the stomach side portion to the back side portion of the exterior body, leaving a side edge near the waist opening, and the band member is a stomach side of the exterior body or It is straddled across the absorbent body from the side edge on the back side, and is bonded to the wearer skin side surface of the exterior body and the wearer skin side surface of the absorbent body in at least a portion excluding the upper edge and the lower edge of the band member The underpants type wearing article of any one of Claims 1-4.   Both the upper end edge and the lower end edge of the strip are exposed on the skin surface side, and there are two joint end biased parts on the upper side and the lower side of the side seam part. The pants-type wearing article according to any one of claims 1 to 5, wherein the part surface is shaped like a "W" that is rolled over in front view.

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