JP2012050716A - Absorptive article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorptive article which is mounted on the inner side of clothes such as underwear, suppresses twists and shifts even when worn for a long period of time, controls/prevents discomfort and liquid leakage while being worn, and maintains high air permeability.SOLUTION: On the non-skin surface side of a back surface sheet 2 in an area where an absorber 3 is present, shift stopping parts for fixation to the clothes are disposed. The area where the shift stopping parts are disposed is, with respect to the vertical direction of the absorber, sectioned into front and rear end shift stopping areas where the shift stopping parts are disposed turning the length in the width direction between a pair of right and left roundish parts in the width direction near the front and the rear ends, and a center shift stopping area where the plurality of shift stopping parts are arrayed turning the length in the width direction at prescribed intervals between them. The vertical direction length (w) of each shift stopping part in the center shift stopping area is set to be shorter than the prescribed interval (v) (w<v).

Description

  The present invention relates to absorbent articles such as disposable diapers, sanitary napkins, incontinence pads, and incontinence liners.

There are absorptive articles of the type that are used by being fixed inside the underwear, such as incontinence pads and sanitary napkins. Such articles are often used by women who perform daily activities, and may be wrinkled or misaligned while worn, especially during walking or sitting. This deviation gives the wearer an uncomfortable feeling and may cause leakage of excretory fluids in some cases. There is also a circumstance that once the displacement occurs, it is not easy to return the displacement because of the article worn inside the underwear. In order to prevent such a situation, the back sheet of the article is usually formed with a misalignment stopper for fixing to the undergarment.
For example, in Patent Document 1, in a vertically long absorbent article, the shift stoppers are arranged in an I shape in plan view so as to extend along the longitudinal direction. That is, the vertically long misalignment portion is arranged wide at the front and rear, and on the other hand, at the center in the vertical direction, it is arranged only at the center in the width direction. Further, in Patent Document 2, in a vertically long absorbent article, a large number of misalignment stoppers are intermittently arranged in the longitudinal direction, and the shape of each individual misalignment stopper is from the longitudinal end portions toward the crotch portion. The length in the width direction is shortened. These absorbent articles are intended to relieve misalignment due to intense body movement by allowing the side edges in the width direction of the crotch portion to be deformed without being fixed to the clothes. Patent Document 3 describes that at least 60% or more of the surface of the back sheet is not provided with an adhesive as a fixing means for underwear. However, the specific arrangement of the adhesive is not disclosed.

JP 63-54164 A JP 2003-10245 A JP 2000-512872 A

  Incidentally, absorbent articles such as incontinence pads are often used by relatively young women in their 30s and 50s. For such users, an active life in the wearing state is unavoidable, and the user may be busy and lose the opportunity to exchange. Especially during work, you may have to wear it for a long time due to desk work, meetings, etc., and you may have to keep the same posture in the sitting position. In this case, a continuous external force is applied to the crotch portion, unlike an instantaneous external force in an exercise such as walking or sitting. Such an external force that is continuously applied causes a slight twist or misalignment. In addition, if the absorbent article contains moisture after long-term use, it is likely to be plastically deformed, and the twist is more likely to occur. In order to prevent this, simply increasing the amount of application of the anti-slipping agent will impair air permeability. The inventors of the present invention have studied a technique for controlling / preventing higher deviation and deviation in this type of absorbent article through the above-described phenomenon analysis.

  In view of the above points, the present invention is an absorbent article to be attached to the inside of a garment such as underwear, and controls the occurrence of discomfort and leakage during wearing by suppressing twisting and misalignment even during long-time wearing. It is an object of the present invention to provide an absorbent article that prevents and maintains high air permeability.

The present invention is an absorbent article comprising a top sheet disposed on the skin side when worn, a back sheet disposed on the non-skin side, and a liquid-retaining absorbent interposed between the two sheets. And
The absorbent article has a vertically long shape that is used by being arranged inside a garment with a longitudinal direction and a width direction intersecting with the longitudinal direction, and the absorbent article is disposed at both ends of the longitudinal direction of the absorbent article. It has an edge that does not exist, the absorber has a rectangular outline rounded at the four corners in plan view, and the non-skin surface side of the back sheet in the region where the absorber exists, A misalignment stopping portion for adhering to the clothes is disposed, and the disposition preventing disposition region is located between the pair of rounded portions in the width direction near the front and rear ends in the longitudinal direction of the absorber. The front and rear end shift stop regions in which the shift stop portion is disposed with its length oriented in the width direction, and the gap stop portion is spaced in the vertical direction by a predetermined distance therebetween and the length thereof directed in the width direction. The central misalignment area is divided into a plurality of central misalignment stop areas, Individual longitudinal length of the dislocation-preventing portion in (w) is said is shorter than the predetermined distance (v) (w <v) is to provide an absorbent article.

  The absorbent article of the present invention is an absorbent article to be attached to the inside of clothing such as underwear, and controls and prevents the occurrence of discomfort and leakage during wearing by suppressing twisting and misalignment even during long-time wearing. In addition, there is an excellent effect of maintaining high air permeability.

It is the partially notched perspective view which showed typically the incontinence pad as one Embodiment (Embodiment 1) in this invention from the skin surface side. It is the top view which showed typically the incontinence pad as one Embodiment in this invention from the non-skin surface side (back surface sheet side). It is the modeled perspective view for demonstrating the state of the crotch part of the clothes which adhere the incontinence pad of this embodiment. It is an expanded sectional view of the IV-IV line cross section of FIG. It is a partial expanded explanatory view which shows typically the application pattern of the adhesive agent in an adhesion fixing part from the skin surface side of a back surface sheet. It is a schematic diagram which shows typically the modification of the arrangement | positioning pattern of the slip prevention part in the incontinence pad as this embodiment. It is a schematic diagram which shows typically the other modification of the arrangement | positioning pattern of the slip prevention part in the incontinence pad as this embodiment.

FIG. 1 is a partially cutaway perspective view schematically showing an incontinence pad as an embodiment (Embodiment 1) in the present invention from the skin surface side. FIG. 2 is a plan view schematically showing an incontinence pad as one embodiment of the present invention from the non-skin surface side (back sheet side). In FIG. 2, in order to understand the relationship between the misalignment stopper 5 and the outer shape of the absorber 3, the misalignment stopper 5 and the absorber 3 are indicated by solid lines, the outer shape of the incontinence pad 10 is indicated by an alternate long and short dash line, The members of are omitted.
The incontinence pad 10 in the present embodiment includes a liquid-permeable top sheet 1 disposed on the skin surface side when worn, a leak-proof back sheet 2 disposed on the non-skin surface side, and a liquid interposed between both sheets. A retaining body 3 is provided. On the non-skin surface side of the back sheet 2, a displacement stopper 5 is disposed. The misalignment stopper 5 can be formed, for example, by applying an adhesive (fixed and removable). The misalignment portion 5 can be effectively prevented even if it is worn for a long time by using the arrangement pattern described later. In the present embodiment, side sheets 4, 4 forming the standing leakage prevention wall T are disposed on the left and right side portions in the width direction of the incontinence pad 10. When the incontinence pad 10 is worn, the longitudinal direction (X direction) arranged along the direction from the wearer's abdomen to the back side part via the crotch part and the width direction (Y direction) orthogonal thereto. ) And has a vertically long shape that is used on the inside of the clothes.

  In the present invention, unless otherwise specified, the surface in contact with the human body is referred to as a skin side surface or a skin contact surface, and the opposite surface is referred to as a non-skin surface or non-skin contact surface. Of these two surfaces, the side closer to the skin side or the extending direction is called the skin side and the skin contact surface side, and the side closer to the non-skin surface or the extension direction is the non-skin side and the non-skin contacting surface side. That's it. In the plan view of the absorbent article, a direction from the abdominal side to the back side through the crotch is referred to as a vertical direction, and a direction orthogonal to the vertical direction is referred to as a width direction. The direction located on the front side of the human body at the time of wearing will be referred to as the front, and the direction located on the rear side will be described as the rear. The vertical direction typically coincides with the front-rear direction of the human body in a worn state. In the outer shape of the article, the front and rear outer edges are used as end edges, and the width direction outer edges are used as side edges. The normal direction of the front or back surface of the absorbent article is called the thickness direction, and the amount is called thickness.

  In the present embodiment, the top sheet 1, the side sheet 4, and the back sheet 2 extend outward in the longitudinal direction of the absorber 3 and are joined by heat sealing or the like. This joined portion forms the longitudinal end edges E, E of the incontinence pad 10. On the other hand, in the width direction of the absorbent body 3, the top sheet 1 enters from the skin surface side of the absorbent body 3 to the non-skin surface side beyond the left and right side surfaces thereof, and further, the side sheet 4 extends from the outside to the non-skin surface side. It enters the skin side. The part into which the topsheet 1 and the sidesheet 4 enter is joined between the backsheet 2 and the absorber 3. In particular, the portion to which the side sheet 4 is joined forms the base portion t of the upright leak-proof wall T. In the outline of the incontinence pad 10 formed in plan view, as shown in FIG. 2, the outer peripheral side edges 10i, 10i in the width direction extend in the vertical direction, and the front and rear ends thereof are at the vertical end edges E, E. It is connected to the outer peripheral edges 10j, 10j in the vertical direction curved so as to project outward. Of the outer peripheral edges 10j, 10j, convex portions at the four corners connected to the outer peripheral edges 10i, 10i in the width direction are shown as curved portions q. The shape of the outer peripheral edge 10j in the vertical direction forms a curved portion having a convex curvature as a whole in the present embodiment. However, the shape is not limited to this, and the curved portion q facing in the width direction may be connected by a straight line or the like. Good. In that sense, the curved portion q may be determined functionally or formally in relation to a later-described shift stopper 5 as convex portions at the four corners of the incontinence pad 10, and is not limited to the above-described form. Absent.

The absorbent body 3 includes an absorbent core 31 and an antibacterial deodorant mount 32 that covers the absorbent core 31. Further, a deodorizing sheet 33 is disposed at the central portion of the absorbent core 31 in the vertical direction so as to cover from the skin surface side to the middle of the side surface (see FIG. 1). In the outer shape of the absorbent body 3 formed in a plan view, as shown in FIG. 2, the side edges 3i and 3i in the width direction extend in the vertical direction, and the front and rear ends thereof are rounded at the four corners on the vertical edge side. It is connected to a portion (hereinafter referred to as a curved portion r), and has a rectangular outline as a whole. In the present embodiment, two curved portions r, r facing each other in the width direction at each of the longitudinal front and rear edges are continuously formed into one arcuate edge 3j. In addition, the external shape of the vertical direction edges 3j and 3j is not limited to the shape of the present embodiment, and may be a shape that connects the curved portions r and r facing each other in the width direction by a straight line or the like. In that sense, the curved portion r may be determined functionally or formally in relation to a later-described misalignment preventing portion 5 as a rounded portion at the four corners, and is not limited to the above-described form.
The outer shape of the absorbent body 3 is substantially similar to the outer shape of the incontinence pad 10, and the vertical edges 3 j and 3 j thereof are located inside the vertical edges E and E of the incontinence pad 10. Therefore, the longitudinal edge portions E and E are portions where the absorber 3 is not disposed. Note that the contour of the absorbent body 3 will be described as a length in the width direction (D) and the longitudinal length (W _t) (see FIG. 2). Of the longitudinal length (W _t ), the linear outer peripheral side edge 3i of the absorber is defined as a linear contour region (W ₂ ), and the portions formed by curved portions r and r facing each other ( The portion surrounded by the outer peripheral edge 3j) will be described separately from the curved contour region (W ₁ ) (see FIG. 2). In addition, the shape of the absorber 3 is not limited to the rectangular shape of this embodiment, The shape normally used for this kind of article | item can be employ | adopted, For example, the substantially hourglass shape which the vertical direction center part was bundled may be sufficient.

A pair of compressed grooves 9, 9 are formed on the skin surface side of the top sheet 1 of the incontinence pad 10 (see FIG. 1). The compressed groove 9 is formed by embossing or the like that integrates the topsheet 1 and the absorber 3 and acts as a flexible shaft for deforming the incontinence pad 10. Side sheet 4 Ganasu orthostatic leakage preventing wall T is composed of the leak-proof surface portion T ₁ the standing wall portion T ₂ Metropolitan (see FIG. 4). Leakage preventing surface portion T ₁ is overhanging substantially horizontally outward in the width direction of the incontinence pad 10, the inside of the free end portion the elastic member 15 consisting of rubber threads are secured in a stretched state (see FIG. 4 ). Thus, gathers are formed on the leakage preventing surface portion T _1, leak-proof surface portion T ₁ is in contact with contact person in terms the wearer's skin, side leakage is effectively prevented. On the other hand, by the upstanding wall portion T _2, the side sheet 4, the pocket P is formed between the absorber 3. Thereby, even if the excreted liquid flows out along the surface of the topsheet 1, it is captured by the pocket P and further outflow is prevented.

  The incontinence pad 10 is arranged with its topsheet 1 side facing the wearer's skin surface and its vertical direction from the lower abdomen to the buttocks, in other words, its width direction is directed to the direction of the line connecting the left and right legs To be installed. At that time, the back sheet 2 and the clothes of the incontinence pad 10 are fixed by the misalignment stopper 5. Although the details will be described later by the arrangement of the misalignment stopping portion 5 according to the present embodiment, external force, particularly distortion that gradually increases due to continuous external force is relieved mainly in the clothing portion in the non-existing region 6 where there is no misalignment stopping portion 5. As a result, the spread of strain to the incontinence pad 10 having high rigidity, in particular, the bonded portion with the clothing can be reduced. Thereby, the twist and deviation of the incontinence pad 10 and the clothes can be effectively prevented. The used incontinence pad 10 can be removed from the clothes and replaced with a new incontinence pad.

On the non-skin side of the back sheet 2 of the present embodiment, the slip stoppers 5 are intermittently disposed in the longitudinal direction in the region where the absorber 3 is present (see FIG. 2). The shift stoppers 5 are arranged at substantially equal intervals over the entire length in the longitudinal direction of the absorber 3 in order to firmly fix the region where the absorber 3 exists. The arrangement area of the deviation stopper 5 corresponds to the front and rear edge deviation prevention areas 51 and 51 corresponding to the curved outline areas (W ₁ ) and (W ₁ ) of the absorber 3 and the linear outline area W ₂ of the absorber 3. And a central misalignment stop region 52 (see FIG. 2). Each of the misalignment stoppers 5 has a rectangular shape extending in the width direction, and has a width direction length (d) and a length direction (w). A portion sandwiched between adjacent individual shift stoppers 5 forms a non-existing region 6 where the shift stoppers are not disposed. In particular, in the center misalignment region 52, the longitudinal length (v) of each non-existing region 6 is longer than the longitudinal length (w) of each misalignment stop portion 5 ((w) <(v)). The misalignment prevention portions 5 are arranged substantially evenly at intervals (longitudinal length (v) of non-existing regions) wider than the application width (vertical length (w)). Here, the substantially equal arrangement of the individual shift stoppers 5 means the relationship between the vertical length (w) of the shift stoppers 5 and the vertical length (v) of the non-existing region 6. This means that (w) <(v) and the ratio (w) / (v) is substantially the same throughout the entire arrangement of the shift stoppers 5, which means that manufacturing errors are allowed. In the present embodiment, “exist” and “corresponding” shown on the non-skin surface side of the back sheet 2 are regions that substantially match when the shape of the absorber 3 is projected on the non-skin surface side of the back sheet 2. Or it means a part.

In the present embodiment, in the center misalignment region 52, the relationship between the vertical length (w) of the individual misalignment portions 5 and the vertical length (v) of the non-existing region 6 is ((w) <( v)), the deformable area of the non-existing area 6 is widened, and the back sheet can be freely deformed in the deformable area even if the underwear is twisted or bent due to daily activities. As a result, deformation of the incontinence pad can be suppressed, thereby preventing fine twisting or deviation due to continuous external force. From this viewpoint, in the central misalignment region 52, the average value of the ratio (w) / (v) of the vertical length (w) of the misalignment portion 5 and the longitudinal length (v) of the non-existing region 6 is 0.20 to 0.91 is preferable, and 0.33 to 0.45 is more preferable. Alternatively, or in addition, the average value of the difference (v)-(w) in the longitudinal length between the misalignment portion 5 and the non-existing region 6 in the central misalignment region 52 is preferably 0.1 to 30 mm, 0.18 More preferably, it is 20 mm. Furthermore, the ratio (Σw) / (Σv) of the sum (Σw) of the vertical lengths (w) of the individual shift stoppers and the sum (Σv) of the vertical lengths (v) of the individual non-existing regions 6 Is preferably 0.30 to 0.93, more preferably 0.50 to 0.90. By setting it to the above lower limit value or more, it is possible to prevent twisting and deviation and to ensure comfortable air permeability. By setting the upper limit value or less, the vertical length (v) of the non-existing region 6 is excessively increased. The prevention of misalignment can be further enhanced.
In the present invention, the shape of the misalignment stopping portion 5 is not limited to the rectangular shape of the present embodiment as long as it is a shape extending in the width direction so as to correspond to the shape of the absorber 3. It may be a constricted shape. In this way, when the lengths in the vertical direction of the shift stopper 5 and the non-existing region 6 are not constant, a preferable numerical range of the shift stopper 5 and the non-existing region 6 is set to a length in the vertical direction of the shift stopper 5. Instead of (w) and the longitudinal length (v) of the non-existing region 6, the ratio and / or difference of the average value of the area of the shift stopper 5 and the area of the non-existing region 6 may be used.

  Usually, various external forces are applied to the clothes to which the incontinence pad is fixed. In particular, when the wearer keeps the same posture for a long time, a fine twist due to compressive force is likely to occur. Further, a complex external force is continuously applied in combination with twisting or shearing force, and in particular, the inseam portion of the incontinence pad 10 is likely to be gradually distorted or turned up. Even if the strain due to the external force is small at the beginning of mounting, the continuous external force for a long time tends to gradually increase the strain. This point will be described with reference to FIG. FIG. 3 is a modeled perspective view for explaining the state of the crotch portion of the clothes P to which the incontinence pad is fixed. The ratios and shapes of various dimensions are not necessarily matched with those actually used and are modeled and illustrated. FIG. 3 schematically and partially shows a saddle face having a transverse main curvature surface 25 and a longitudinal main curvature surface 26 which are shapes when the clothes P are worn. If the transverse main curvature surface 25 is a convex surface having a center of curvature radius in the negative (D) direction, the longitudinal main curvature surface 26 is regarded as a concave surface having a center of positive (U) curvature radius. be able to. That is, the saddle face shape is a surface formed by intersecting two arcs having the center point of curvature in opposite directions at the arc vertices so as to face each other and extending both arcs without contradiction.

In FIG. 3, an end edge 11 (hemline) that forms an undercarriage opening for the right foot and the left foot is formed, and the front surface is a surface facing the ventral side. As shown in FIG. 3, typically, arrows f ₁ and f ₁ are applied to the crotch portion, so that the curvature of the transverse main curvature surface 25 tends to increase, and conversely, the curvature of the longitudinal main curvature 26 tends to decrease. Work. In a situation where the wearer takes the same posture such as a sitting position, the external force of the arrow f ₁ is gradually applied to the crotch center point A from the right foot side at the inseam portion of the clothes, for example, at the point B of the transverse main curvature surface 25. Strain increases gradually. On the other hand, in the crotch center point A, the force is applied in the arrow f ₂ from the front and rear direction in conjunction with the force of the arrow f _1, it is from the front and rear ends of the garment P to the force directed to the inside thereof a central point A Strain increases gradually. Due to the action of such contradicting forces, the inseam portion of the clothing P is squeezed and the drooping is increased. At the same time, if the wearer takes a posture in which the right foot and the left foot are shifted back and forth, or takes a posture in which the feet are crossed as they are, the forces f ₃ and f in the opposite directions at the left and right in the vicinity of the suspension openings 11 and 11. ₄ takes. In this case, more complicated fine wrinkles are likely to occur in the crotch portion of the garment P together with the forces of the arrows f ₁ and f ₂ .

  If such a complex external force continues to be applied, normally, with the flexible and deformable clothing and the rigid incontinence pad fixed at the absorber part, the clothing tends to deform over time, especially the inseam of the incontinence pad Large distortion gradually spreads to the misalignment stop corresponding to the part. In addition, in the case of wearing for a long time, the absorbent body contains moisture in the excretory fluid or the like, so that the fiber of the material loses elasticity and is more likely to be plastically deformed, and the absorbent body tends to wrinkle. On the other hand, simply widening the adhesive width and increasing the fixing force with the clothes will cause the rigid bonded portion to spread too much, and a deformation that can alleviate the external force cannot be obtained. Therefore, peeling due to strain may be promoted. In addition, it is not preferable to unnecessarily widen the fixing portion from the viewpoint of air permeability and moisture permeability of the incontinence pad. On the other hand, if the fixing portion is set to be small, the fixing force of the incontinence pad to the clothes is not sufficient with respect to the external force, and it becomes easy to cause drooling or peeling.

On the other hand, in the incontinence pad 10 of the present embodiment, as shown in FIG. 2, by sufficiently securing the non-existing region 6 as a deformable region with respect to each misalignment portion 5 in the central misalignment region 52, Distortion due to external force can be reduced. Specifically, in the central misalignment area 52, the average ratio (w) / (v) of the vertical length (w) of the misalignment portion 5 and the vertical length (v) of the non-existing area 6 or By setting the average value (v) − (w) of the difference within the above-described preferable range, it is possible to further alleviate the external force, particularly the continuous external force applied to the crotch portion. In the present embodiment, the incontinence pad 10 and the clothing P are in a so-called bellows shape by alternately arranging the width (w) of the shift stopper 5 and the width (v) of the non-existing region 6 at the aforementioned intervals. It is fixed and integrated. In addition, the displacement stopper 5 and the non-existing region 6 correspond to the position of the rigid absorbent body 3, and the absorbent body 3 and the clothing P are indirectly fixed in a bellows shape (see FIG. 2). In this fixed state, the incontinence pad 10 and the clothing P become a movable structure that can flexibly respond to external forces.
In the present embodiment, the front and rear end misalignment areas 51 and 51 suppress distortion caused by an instantaneous external force during walking or sitting, and the central misalignment area 52 effectively reduces continuous external force by the movable structure. obtain. In the movable structure, the clothes P are stretchable in the non-existing region 6 and the clothes P can be deformed by flexibly following expansion / contraction, twisting, twisting, and the like due to external force. While the external force is relaxed by the deformation of the sufficiently large non-existing region 6, the incontinence pad 10 and the clothes P can be fixed at the portions of the shift stoppers 5 even in the deformation. That is, the incontinence pad 10 of the present embodiment has a structure that can be integrally deformed with the clothing P. Even if a continuous external force for a long time continues to be applied, the portion of the non-existing region 6 of the movable structure continuously maintains the deformed state, and the flexible back sheet 2 undergoes creep deformation due to stress relaxation, and the back sheet 2 Since the external force applied to the underwear is absorbed and the portion of the stopper portion 5 is firmly bonded to the underwear by an adhesive or the like, the external force is effectively relaxed and the strain at the fixed portion between the incontinence pad 10 and the clothing P is reduced. Increase is suppressed. As a result, fine wrinkles and deviations are effectively prevented.

In the present embodiment, by disposing the misalignment stoppers 5 and the non-existing regions 6 alternately according to the above-described settings, the air permeability and moisture permeability can be sufficiently maintained, and the entire coating is performed more than usual. Since the amount can be reduced, it contributes to resource conservation and environmental protection after disposal, and can reduce costs. In addition, by ensuring sufficient air permeability and moisture permeability, it is possible to increase the basis weight for applying the adhesive or the like so that the individual shift stoppers 5 are wider than usual. In other words, the arrangement of the displacement preventing portion 5 and the non-existing region 6 improves the adhesive fixing force by adjusting the longitudinal length (w) and the basis weight of the displacement preventing portion 5, and allows air permeability and moisture permeability. It is possible to achieve both From this point of view, in the central misalignment region 52, the ratio (Aa) / (At) of the total area (Aa) of the misalignment prevention portion 5 to the total area (At) of the non-existing region 6 is 0.20-0. 91 is preferable, 0.33-0.85 is more preferable, 20-20-120 g / m < ² > is preferable and, as for the average basic weight of each shift stop part 5, 30-100 g / m < ² > is more preferable. The number of all misalignment stop portions is preferably 3 to 80, particularly 5 to 60 in the vertical direction.

  In the present embodiment, the length (d) in the width direction of each misalignment stop portion 5 can be firmly fixed to the clothing up to the vicinity of the side edges 3i, 3i in the width direction of the entire absorbent body 3. For this reason, even if there is a twist or the like, it is difficult for deviation and dripping from the position of the side edge of the absorbent body 3 to occur. Further, even in the case of loss of elasticity of the absorbent body 3 due to moisture, the arrangement having the length (d) in the width direction supports the absorbent body 3 firmly in the width direction and tries to maintain the resilience of the shape. In the present embodiment, the width direction length (d) of the shift stopper 5 that firmly supports the width direction of the absorbent body 3 is not limited even if continuous external force is applied due to the combination with the above-described bellows-like arrangement. By shifting the deformation amount of the non-existing region 6 in the width direction and following a three-dimensional complicated deformation as shown in FIG. From this point of view, the ratio (d) / (D) of the width direction length (d) of each misalignment stopper 5 and the width direction length (D) of the incontinence pad 10 is 0.5 to 0.99. Preferably, 0.6 to 0.95 is preferable.

In the present embodiment, as shown in FIG. 2, the shift stop portions 5 of the front and rear end shift stop regions 51, 51 have the width direction length (d), respectively, and the curved contour regions (W ₁ ), ( W ₁ ). In the curved contour region (W ₁ ) of the absorbent body 3, since the external force is dispersed from the shape and firmly fixed by the misalignment stopping portion 5, misalignment and curling are easily prevented. In addition, such an arrangement, combined with the movable structure, can sufficiently suppress peeling of the misalignment stopper 5 even when a continuous external force is applied. Furthermore, in the present embodiment, since the deviation preventing portion 5 of the front and rear end deviation preventing region 51 is connected to the absorber edge curve portion r having high rigidity, the flexible portion where the absorber 3 is not disposed is used as a trigger. Is preferable because it is possible to prevent peeling of the shift stopper 5 of the absorber edge curve portion r. From this point of view, the curved portions r and r that define the curved contour region (W ₁ ) effectively prevent misalignment or the like of the absorbent body 3 from the vertical direction, and the width direction length ( What is necessary is just to be defined as a range arranged with d).
In the present embodiment, the shift preventing portions 5 of the front and rear end shift stopping regions 51 are arranged on the inner side of the incontinence pad 10 so as not to reach the longitudinal end edges E and E (see FIG. 2). The longitudinal edge E of the incontinence pad 10 can absorb external force by being not fixed as a flexible part where the absorber 3 is not disposed. In particular, the curved portion q is preferable because it can be deformed while dispersing external force. Such an arrangement is combined with the movable structure corresponding to the absorber 3, the shape of the curved contour region (W ₁ ) of the absorber 3, and the arrangement structure of the slip stopper 5 disposed in the front and rear slip stopper region 51. Even if a continuous external force is applied, the external force is continuously dispersed at the curved portion q, and it is difficult to apply a direct external force directly to the curved contour region, and it is easy to disperse the force applied to the curved contour region in the surface direction. In addition, the anti-slip material in the front-to-back misalignment region 51 suppresses curling of the curved contour region. Furthermore, in this embodiment, since the deviation preventing portion 5 of the front and rear end deviation preventing region 51 is connected to the absorber edge curve portion r having a high rigidity, curling at the portion of the absorber 3 from there is suppressed. This is preferable because it can provide a sufficient effect of suppressing dripping. Further, it is preferable that the longitudinal end edge E of the incontinence pad 10 is not fixed because a soft texture, air permeability and moisture permeability can be secured. From the viewpoint of preventing the slippage of the shift stop portion 5 of the absorber edge curve portion r from being caused by a flexible portion where the absorber 3 is not arranged, the shift stop portion 5 in the front and rear end shift prevention regions 51 and 51 is: It is preferable that the absorber 3 is disposed in contact with or beyond the longitudinal edges 3j, 3j.

In the present embodiment, as shown in FIG. 4, the side sheet 4 has one end that wraps the elastic member 15 on the skin surface side of the top sheet 1 to form a standing leak-proof wall T, and the other end of the back sheet 2. The base part t of the standing leak-proof wall T is formed by entering and joining the skin surface side. The base portion t slightly enters inward so as to correspond to the width direction length (d) of the misalignment stopping portion 5 corresponding to the width direction of the absorber 3. By doing so, inadvertent deformation of the side seat 4 together with the rigid absorbent body 3 and the movable structure of the slip stopper 5 is avoided, and the adhesion between the leak-proof wall T and the skin is favorable. Moreover, the base part t of the leak-proof wall T and the clothes P become a movable structure which can respond flexibly to an external force, and it can be made difficult to leak by preventing dripping.
In the present embodiment, as shown in FIG. 4, the back sheet 2 is bonded to the absorbent body 3 or the side sheet 4 on the skin surface side by an adhesive fixing portion 8. In the present embodiment, the adhesive fixing portion 8 is formed by applying a hot melt adhesive by spiral coating. In the formation of the adhesive fixing portion 8, a plurality of overlapping portions of the adhesive can be formed in a straight line as shown in FIG. That part is a part where the basis weight of the adhesive is larger than that of the other part and the adhesive force is maximized (hereinafter referred to as the maximum part 8a). In the present embodiment, the maximum portion 8a extends in the vertical direction and is intermittently arranged in the width direction. In other words, the maximum portion 8 a extends in a direction orthogonal to the non-existing region 6 on the non-skin surface side of the back sheet 2 and is arranged so as not to overlap with the non-existing region 6 as much as possible. Such an arrangement is preferable because the air permeability and moisture permeability of the non-existing region 6 are improved.

FIGS. 6 and 7 are schematic views schematically showing Modification Examples 1 and 2 of the arrangement pattern of the shift stoppers 5 in the incontinence pad 10 according to the present embodiment. In addition, in order to understand the shape as a modified example of the misalignment prevention portion, the number of arrangements and the relationship with the absorbent body are shown with the details omitted.
The center portion in the width direction of the misalignment stopping portion 5 in the modified example 1 has a bow shape that is convex toward the center in the vertical direction of the incontinence pad 10. By adopting such a shape, it is preferable because different external forces are applied to the side edge portion and the central portion of the misalignment stopping portion 5 and it becomes easy to follow the deformation. The shift stopper 5 in the second modification is formed in a letter-like shape without a protrusion in the vertical central portion except for the shift stopper disposed in the vertical central portion. Such a shape is preferable for the same reason as in the first modification, but it is preferable because a pattern suitable for the activity level can be easily designed by changing the angle and width of the character. In these modified examples 1 and 2, since the shape in the width direction of the shift stopper 5 and the non-existing region is changed and the length in the vertical direction is not constant, the average of the areas of the individual shift stoppers 5 and the individual areas The average area of the non-existing garment region 6 can be determined in place of the vertical length (w) of the shift stopper 5 and the vertical length (v) of the non-existing region 6.

Hereinafter, the material of the member which comprises the incontinence pad 10 of this embodiment is demonstrated.
[Displacement stop]
The misalignment stopper 5 can be formed without any limitation normally used for this type of article as means for fixing the incontinence pad 10 to the clothes. For example, emulsion-based, water-based, and solvent-based pressure-sensitive adhesives and pressure-sensitive adhesive tapes coated with them are mentioned. From the viewpoint of obtaining sufficient misalignment prevention performance and stable productivity, pressure-sensitive adhesives such as hot-melt pressure-sensitive adhesives. It is preferable to form by coating. As the pressure-sensitive adhesive, those usually used for this type of article can be used without limitation, but it is preferable to use a synthetic rubber block copolymer mainly having a basic structure similar to natural rubber. Examples of such a block copolymer include styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-propylene-ethylene copolymer (SEPS), and styrene-butadiene-styrene block copolymer (SBS). And styrene-ethylene-butylene-ethylene copolymer (SEBS). The pressure-sensitive adhesive preferably contains 10 to 65% by weight, particularly 30 to 50% by weight, of one or more base polymers selected from these block copolymers.
[Adhesive fixing part]
The adhesive fixing part 8 is a part that adheres and fixes the back sheet 2 and the absorber 3 or the side sheet 4. From the viewpoint of ensuring the breathability and moisture permeability of the incontinence pad 10, a hot melt adhesive is desired as described above. The method of coating by a spiral pattern by arrangement | positioning is mentioned. In addition, it can replace with an adhesive agent and can also use other arbitrary joining methods, such as a heat seal, as an adhesion fixing method other than this. Further, when joining with an adhesive, solid coating with a slot coater or the like may be used, but pattern coating is preferred from the viewpoint of air permeability and moisture permeability. Preferable examples of the pattern coating application include spiral patterns, dot patterns, stripe patterns (striped patterns), lattice patterns, checkered patterns, and the like.

[Others]
As a material for forming the top sheet 1, the back sheet 2, the absorber 3, the side sheet 4, and the elastic member 15, those employed for this type of article can be used without any particular limitation. For example, as the surface sheet 1, a laminated structure of various nonwoven fabrics (for example, an air-through nonwoven fabric or a spunbond nonwoven fabric) or a composite sheet formed of a laminate of a nonwoven fabric and a film and having a large number of apertures is used. It is done.
The back sheet 2 is not particularly limited as long as it is liquid leakproof, for example, but preferably has air permeability and moisture permeability. For example, the back sheet 2 is preferably made of a hydrophobic thermoplastic resin and calcium carbonate or the like. Examples thereof include a porous film obtained by melt-kneading an inorganic filler or an incompatible organic polymer to form a film, and uniaxially or biaxially stretching the film. Examples of the thermoplastic resin include polyolefin. Examples of the polyolefin include high to low density polyethylene, linear low density polyethylene, polypropylene, polybutene and the like, and these can be used alone or in combination.
As the side sheet 4, a water-repellent nonwoven fabric is preferable, and specifically, a spunbond nonwoven fabric, a spunbond-meltblown (SM) nonwoven fabric, a spunbond-meltblown-spunbond (SMS) nonwoven fabric, or the like is used. Examples of the elastic member 15 include synthetic rubber such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, polyurethane, and the like. Polygon-like thread-like or string-like (flat rubber etc.) or multifilament-type thread-like ones can be used.
The absorbent body 3 is configured by mixing superabsorbent polymer particles in an absorbent core mainly composed of a liquid absorbent fiber material such as pulp. Moreover, although the material of the antibacterial deodorizing mount 32 and the deodorizing sheet 33, the conditions in the manufacturing method, and the dimensions of the product are not particularly limited, the matters described in JP 2001-70339 A and JP 2008-63711 A are described. You can refer to it.

  The absorbent article of the present invention is not limited to the above embodiment, and can be applied to, for example, disposable diapers, sanitary napkins, incontinence liners, and the like. Moreover, the absorbent article of the present invention is not limited to being attached to underwear, and may be attached to, for example, a diaper cover or a diaper. Furthermore, the number of disposition stoppers is not limited to that of the present embodiment, and can be arbitrarily set according to the size of the absorbent article of the present invention.

EXAMPLES Hereinafter, although this invention is demonstrated in detail based on an Example, this invention is not limited to these.
Example 1
The incontinence pad shown in FIGS. The full length and the full width of the article were 225 mm and 75 mm, respectively, and the absorber full length (Wt) and the curved contour region (W ₁ ) were 190 mm and 15 mm, respectively. The length (w) in the vertical direction of each shift stopper is 3.5 mm, the interval between the stoppers (vertical length (v) of the non-existing region) is 4.8 mm, and 21 shift stoppers are arranged. . Hot melt was provided at a basis weight of 55 g / m ² as each misalignment stop. In addition, the ratio of the article width direction length (d) and the article width direction length (D) of the misalignment preventing portion was 0.79.

(Comparative example)
In Example 1, the longitudinal length (w) of the misalignment stoppers and the interval between the misalignment stoppers (the longitudinal length (v) of the non-existing region) are both 2.0 mm, and the hot melt basis of each misalignment stopper An incontinence pad was prepared in the same manner except that the amount was 50 g / m ² and the number of slip stoppers was 41.

About the incontinence pad of an Example and a comparative example, the adhesive force and air permeability of the adhesion layer were evaluated with the following method.
<Measurement method of adhesive strength of adhesive layer>
Evaluation is performed using a Tensilon tensile tester in an environment of 20 ° C. and 50% HR. The layer of the anti-displacement adhesive that exposed the incontinence pad was faced up, and Kanakin (for JIS dyeing fastness test (conforming to JIS L0803); length 200 mm × width 50 mm) as a test cloth was stuck on the layer. A 2 kg roller was gently reciprocated on the sticking surface to apply pressure. Next, one end along the longitudinal direction of the napkin is fixed to one chuck of the Tensilon tensile tester, and one end of the kanakin is fixed to the other chuck to form a T-shaped test piece, and then the tensile speed is 300 mm / min. A tensile test was performed, and the initial adhesive force was determined by converting the force required for tension per cm.
<Air permeability>
In accordance with JIS Z-0208, the following procedure was performed. First, a circular shape having a diameter of 60 mm or more was cut out from a moisture permeable film (a back sheet having a misalignment stopper), and this was prepared as a test piece. Place a test piece on a cup containing 18 g of calcium chloride, harden the periphery of the test piece with a diameter of 60 mm with a sealant, and weigh the weight with an upper pan electronic balance (the weight at this time is W0). . Next, a cup with a test piece hardened with a wax is placed on a sample stage in a constant temperature and humidity chamber at 30 ° C. and 90% RH, and the table is rotated. After 1 hour, the cup is taken out and weighed with a top electronic balance (the weight at this time is W1).
Calculate the moisture permeability from the following formula.
Moisture permeability [g / 100cm ² · hr] = (W1-W0) × 3.54

  In the incontinence pad of Example 1, the adhesive force of the misalignment portion was improved by 38% and the air permeability was improved by 15% compared with the comparative example. Therefore, it can be seen that the product of the present invention is excellent in comfort because it suppresses twisting and deviation even when worn for a long time, controls and prevents the occurrence of discomfort and liquid leakage during wearing, and maintains high air permeability. .

DESCRIPTION OF SYMBOLS 1 Top sheet 2 Back sheet 3 Absorber 4 Side sheet 5 Misalignment part 6 Non-existing area 8 Adhesive fixing part 10 Incontinence pad

Claims (7)

An absorbent article comprising a top sheet disposed on the skin side when worn, a back sheet disposed on the non-skin side, and a liquid-retaining absorbent interposed between the two sheets,
The absorbent article has a vertically long shape that is used by being arranged inside a garment with a longitudinal direction and a width direction intersecting with the longitudinal direction, and the absorbent article is disposed at both ends of the longitudinal direction of the absorbent article. Has non-existing edges,
The absorbent body has a rectangular outline with rounded corners in plan view, and a non-skin surface side of the back sheet in a region where the absorbent body is present is a slip stopper for fixing to the clothing. In the longitudinal direction of the absorber, the region where the misalignment stopper is disposed is a length of the misalignment stopper between the pair of rounded portions in the width direction near the front and rear ends. A front and rear end misalignment region arranged in the width direction, and a center misalignment region in which a plurality of the lengths of the misalignment portions are arranged in the vertical direction with a predetermined interval therebetween. Absorbent articles in which the vertical length (w) of each misalignment portion in the central misalignment region is shorter than the predetermined interval (v) (w <v).   2. The displacement preventing portion according to claim 1, wherein each of the misalignment stopping portions is disposed so that a ratio (w / v) between a longitudinal length (w) and the predetermined interval (v) is 0.20 to 0.91. Absorbent article.   The absorbent article according to claim 1 or 2, wherein in the absorbent article, the shift preventing portion does not exist at the edge portions of the front and rear ends where no absorber is present.   The absorbent article according to any one of claims 1 to 3, wherein, in the front and rear end misalignment region, the misalignment portion is in contact with or beyond a side outer edge of the absorber.   The absorbent article is provided with a side sheet that forms a leak-proof wall on the outer side in the lateral direction of the absorbent body, and an end portion of the side sheet is wound on the non-skin surface side of the absorbent body and the back surface. It joins with a sheet | seat, and it comprises the base part of the said leak-proof wall, and this base part is formed even inward from the width direction both sides edge of the said slip stopper part. Absorbent article.   The absorptive article according to any one of claims 1 to 5 which has a center gap stop field of the shape bent or curved in the convex shape toward the article central part from the outside in the vertical direction as said gap stop part.   The back sheet and the absorber or side sheet are fixed by an adhesive fixing portion, and the portion where the adhesive force of the adhesive fixing portion is maximized is arranged to be intermittent in the width direction. The absorbent article according to any one of 5 and 6.

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