JP2017035456A - Sanitary panties - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide sanitary panties excellent in wearing feeling, and in which an absorbent article is hardly deviated from a proper fitting position in wearing thereof.SOLUTION: Sanitary panties 1 comprise: a front bodice 2; a rear bodice 3; and a crotch part 4, and comprise: a vertical direction X which is between the front bodice 2 and the rear bodice 3, and extends through the crotch part 4; and a lateral direction Y orthogonal to the vertical direction, in which an absorbent article is attached to the crotch part 4. The rear bodice 3 has a fastening area 10 in which tense force is relatively higher than that of other areas on the rear bodice 3. The fastening area 10 is formed into a shape of continuously covering an intergluteal cleft, a gluteal fold, and a hip part on a lower part of hip part rear protrusion parts P. Opening ends of leg opening parts 6 comprise annular leg stretch areas 61 along the opening ends. At least a part of each leg stretch area 61 is continuous to at least a part of the fastening area 10 on the gluteal fold.SELECTED DRAWING: Figure 2

Description

  The present invention relates to sanitary shorts.

  For various bottom garments worn to cover the wearer's buttocks, tightening force is used for the purpose of imparting the function of shaping the buttocks and for preventing misalignment of absorbent articles such as incontinence pads and sanitary napkins. Some ideas have been devised such as partially providing a portion with increased height. For example, Patent Document 1 describes that the stretchability in the height direction of the buttock region that wraps the bulge of the buttocks is higher than that of the lower abdomen region of the front body part in the back body part of the waistline of the sanitary shorts Has been. According to the document, the sanitary shorts are said to prevent slipping of the shorts, have good fit and support, and have a good wearing comfort and a stable wearing feeling.

  In Patent Document 2, a main body portion that covers the collar portion and a belt-like first tightening region and a second tightening region that are arranged in a pair of left and right of the main body portion and have a tightening force stronger than the tightening force of the main body portion, respectively. The bottom garment provided is described. In this bottom garment, the first tightening region extends in the longitudinal direction from the upper part of the main body portion to the ridge groove on the rear center side from the apex of the buttocks, and the second tightening region is below the apex of the buttocks. It covers at least the upper side of the ridge groove on the side and rises upward from the lower end of the first tightening region toward the side. In Patent Document 3, a main body part that covers the collar part, a belt-like shape extending along the upper edge of the main body part on the rear side of the main body part, a waist tightening region that is coupled to the main body part, a lower part of the collar part, and a collar part A bottom garment having a U-shape covering the side portions, two upper ends connected to the waist tightening region, an outer side edge coupled to the main body, and an inner side edge not coupled to the main body. Is described. According to the bottom garment described in Patent Literature 2, it is described in the same literature that the function of shaping the heel for relatively elderly people is enhanced. Further, according to the bottom garment described in Patent Document 3, it is described in the same document that a feeling of wearing is improved and a correction force is increased.

JP 2011-50683 A JP2012-0772523A JP 2012-102419 A

  However, the garments described in each of the above-mentioned patent documents have insufficient balance between the fit in the crotch part and the retainability of the absorbent article, or the fit and absorbent articles corresponding to changes in the posture of the wearer. In some cases, the balance with retention was not sufficient.

  Accordingly, an object of the present invention is to improve sanitary shorts, and more specifically, to provide sanitary shorts with a further improved feeling of wearing and retention of absorbent articles.

The present invention has a front body, a back body, and a crotch part, and a longitudinal direction that is a direction between the front body and the back body and extends through the crotch part, and a lateral direction orthogonal thereto. And sanitary shorts used with the absorbent article attached to the crotch part,
The back body has a tightening region having a relatively high tightening force compared to other regions in the back body, and the tightening region has a crack, a ridge groove, and a buttocks at a position below the rear end of the buttocks. A shape that covers the side part continuously,
An annular leg stretchable region along the opening end is formed at the opening end of the leg opening,
The present invention provides a sanitary short in which at least a part of the leg stretchable region is continuous with at least a part of the tightening region in a ridge groove.

The present invention also includes the sanitary shorts,
Sanitary shorts and absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable or hardly-permeable back sheet, and an absorbent article comprising a liquid-retaining absorbent disposed between both sheets. And provide a combination.

  The sanitary shorts of the present invention are excellent in wearing feeling and have good fit between the absorbent article attached to the sanitary shorts and the wearer's body, so that the absorbent article is not easily displaced from the proper attachment position.

FIG. 1 is a perspective view of an embodiment of the sanitary shorts of the present invention as seen from the front body side. FIG. 2 is a perspective view of the sanitary shorts shown in FIG. 1 as seen from the back body side. FIG. 3 is a developed view of the sanitary shorts shown in FIG. 1 as viewed from the skin facing surface side, opened at the boundary between the front body and the back body. 4 is an enlarged view of the crotch portion in the developed view shown in FIG. FIG. 5 is an enlarged view (corresponding to FIG. 4) of the crotch portion in the developed view shown in FIG. FIG. 6 is a schematic diagram illustrating a method for evaluating the degree of damage to the skin by the topsheet of the absorbent article. FIG. 7 is a plan view schematically showing an example of an absorbent article used in combination with the sanitary shorts of the present invention.

  Hereinafter, sanitary shorts of the present invention (hereinafter also simply referred to as “shorts”) will be described based on preferred embodiments with reference to the drawings. As shown in FIGS. 1 to 3, the shorts 1 of this embodiment includes a front body 2, a back body 3, and a crotch portion 4. The shorts 1 is used by attaching an absorbent article (not shown) to the crotch portion 4. In the present embodiment, a direction connecting the front body 2 and the back body 3 via the crotch portion 4 is referred to as a vertical direction X, and a direction orthogonal thereto is referred to as a width direction Y. Therefore, the front body 2 and the back body 3 extend from the crotch portion 4 along the longitudinal direction X in opposite directions. The shorts 1 has a waist opening 5 and a pair of leg openings 6 and 6. The opening end of the waist opening 5 is located above the wearer's hip bone, specifically, above the iliac crest when the shorts 1 is worn. The opening ends of the leg openings 6 and 6 are located near the base of the wearer's thigh, that is, near the groin when the shorts 1 are worn.

  The waist opening 5 of the shorts 1 is formed with an annular waist stretchable region 51 along the opening end at the opening end. The waist stretchable region 51 has an annular band shape having a predetermined width, and has stretchability along the circumferential direction. Each leg opening 6 of the shorts 1 is formed with an annular leg stretchable region 61 along the opening end at the opening end. The leg stretchable region 61 has a shape of an annular band having a predetermined width, and has stretchability along the circumferential direction thereof.

  The shorts 1 is preferably formed by cutting a tubular knitted fabric manufactured by a circular knitting machine into a length corresponding to one piece of the shorts 1, and forming the crotch portion 4 with the knitted fabric for one piece of the cut shorts. It is manufactured by stitching with another fabric. Therefore, the front body 2 and the back body 3 in the shorts 1 are formed from one continuous knitted fabric (fabric). That is, in the tubular waistline portion 7 between the waist opening 51 and the pair of leg openings 6 and 6 in the shorts 1, the knitted fabric forming the front body 2 and the knitted fabric forming the back body 3 are continuous. In the circumferential direction of the waistline portion 7, no joint portion is formed by joining the knitted fabrics by stitching or the like. That is, the waist part 7 has a so-called seamless integrated structure. However, the above-described waist stretchable region 51 and leg stretchable region 61 are made of a fabric different from the fabric that forms the waistline portion 7. The waist stretchable region 51 and the leg stretchable region 61 and the waistline portion 7 are joined at the joint portions 8a and 8b by a joining means such as stitching.

  In the front body 2 of the shorts 1, the front body body 2a excluding the waist opening 5 and the leg opening 6 is composed of a single knitted structure. The front body part 2a has elasticity in any direction on the XY plane including the vertical direction X and the width direction Y. In order to impart such stretchability to the front body portion 2a, for example, a knitted structure that exhibits stretchability may be adopted, or a yarn having stretchability may be used.

On the other hand, as for the back body 3 of the shorts 1, the back body main body part 3a except the waist opening part 5 and the leg opening part 6 is comprised from the some knitting structure. Although the plurality of knitted structures are different from each other, they constitute one continuous knitted fabric, and there are no joints such as a stitched portion between adjacent knitted structures. The back body part 3a having a plurality of mutually different knitting structures is configured such that one of the knitting structures constitutes a tightening region 10 having a higher tightening force than the other regions in the back body part 3a. Yes. In the present specification, the tightening region means a region in which a large tightening force is applied to the wearer's body in the wearing state of the shorts 1. The large tension force is represented by the magnitude of the stress σ when a certain strain ε is given in the stress σ-strain ε curve. A large tightening force generates a large tightening force. The clamping force can also be evaluated by measuring the mounting pressure of the shorts 1.
In order to express a large tightening force, for example, the following method can be employed.
(1) A knitted fabric / fabric made of a knitted fabric having a large inclination E defined by Δσ / Δε and capable of giving a strain ε corresponding to deformation of the body is used for the tightening portion.
(2) A knitted fabric / fabric that does not respond to body deformation and has a non-stretching condition and has a large stress σ is used for the tightening portion. That is, a knitted fabric / fabric having a deformation amount smaller than the deformation amount corresponding to the body deformation is used.

  The pressure when the shorts 1 is worn, that is, the mounting pressure is measured by a mounting pressure measuring device (a contact pressure measuring device (AMI3037-2) manufactured by AIM Techno Co., Ltd.). The specific measurement method is as follows.

[Measurement method of pressure]
Using an air pack of φ = 15 mm, set the air pack so that the center of the air pack is positioned at a predetermined measurement part, and measure the mounting pressure (P1). Subsequently, the center of the air pack is moved by 15 mm along the vertical direction X of the shorts 1 or along the horizontal direction Y, and the mounting pressure (P2) is measured. Similarly, five points are measured at intervals of 10 mm, and the average value is taken as the measurement value. In the obtained measurement value, when a difference of ± 20% or more with respect to the average value of samples with little variation is generated, the measurement value is invalidated and additional measurement is performed.

  The mounting pressure of the crotch portion 4 of the shorts 1 measured by the above method is preferably 1.5 kPa or more, more preferably 2 kPa or more, and further preferably 2.5 kPa or more. The mounting pressure is preferably 4 kPa or less, more preferably 3.5 kPa or less, and even more preferably 3 kPa or less. The mounting pressure of the crotch part 4 is preferably 1.5 kPa or more and 4 kPa or less, more preferably 2 kPa or more and 3.5 kPa or less, and further preferably 2.5 kPa or more and 3 kPa or less.

  Regarding the front body 2 of the shorts 1, the mounting pressure is preferably lower than the mounting pressure of the crotch portion 4. By setting the mounting pressure in this way, the wearing feeling of the shorts 1 can be further enhanced without excessively tightening the wearer's abdomen. From this viewpoint, the mounting pressure of the front body 2 of the shorts 1 is preferably 0.5 kPa or more, more preferably 1 kPa or more, provided that the mounting pressure of the crotch portion 4 is lower. More preferably, it is 5 kPa or more. The mounting pressure is preferably 3 kPa or less, more preferably 2.5 kPa or less, and even more preferably 2 kPa or less. The mounting pressure of the front body 2 is preferably from 0.5 kPa to 3 kPa, more preferably from 1 kPa to 2.5 kPa, and even more preferably from 1.5 kPa to 2 kPa.

  The mounting pressure in the crotch part 4 of the shorts 1 is an intermediate position between the joint part 8c on the front body 2 side and the joint part 8c on the rear body 3 side in the crotch part 4, and the joint parts 8d and 8d on both sides. P1 is measured by placing the air pack at an intermediate position, and P2 is measured using the position as a reference. The wearing pressure in the front body 2 of the shorts 1 is determined by measuring the P1 by placing the air pack at the center of the body on the line connecting the left and right iliac of the front body 2, and using the position as a reference P2 is measured.

  As shown in FIGS. 2 and 3, in the back body part 3, the tightening region 10 is positioned below the wearer's body with respect to the buttock rear protrusion P, that is, a position closer to the leg than the buttock rear protrusion P. In, the shape which covers a crack, a ridge groove, and a buttock side part continuously is comprised. That is, the tightening region 10 includes a crack tightening region 11 that covers the crack, a pair of ridge groove tightening regions 12 that respectively cover the pair of ridge grooves, and a pair of side portion tightening regions 13 that cover the buttock side portions. The buttocks rear protrusion point is the point of the buttocks that protrudes most backward when the human body is viewed from the side. A fissure is a part of a groove that runs vertically in the center of the right and left hips. A ridge groove is a wrinkle at the boundary between a buttock and a leg. In the following description, for the sake of convenience, the crack fastening region 11 is referred to as a first fastening region 11, the ridge groove fastening region 12 is referred to as a second fastening region 12, and the side fastening region 13 is referred to as a side fastening region 13. This is referred to as a third tightening region 13.

  The first tightening region 11 extends along the longitudinal direction X along the crack so as to cover the wearer's crack when the shorts 1 is worn. The first tightening region 11 has a strip shape having a predetermined width. The lower end region of the first tightening region 11 is connected to the inward end region of each second tightening region 12. Each second tightening region 12 extends in the lateral direction from the lower end region of the first tightening region 11 outward in the lateral direction Y and along the ridges when the shorts 1 are worn. Each of the second tightening regions 12 has a predetermined width and has a curved shape that is convex toward the lower side (that is, the wearer's leg side). An end region in the width direction Y of each second tightening region 12 is connected to each third tightening region 13. Each of the third tightening regions 13 extends from the bottom to the top and toward the boundary between the front body 2 and the back body 3 so as to cover the side of the buttocks of the wearer when the shorts 1 are worn. Yes. Each third tightening region 13 is connected to the second tightening region 12 and has a belt-like shape that is substantially the same width as the second tightening region 12. As described above, the waist part 7 of the shorts 1 has a seamless integrated structure, and therefore there is no clear boundary, for example, a suture line between the front body 2 and the back body 3. Therefore, in the present specification, the boundary between the front body 2 and the back body 3 is the top of the wearer's head out of the plane parallel to the line of sight when the wearer is viewed from the side when the shorts 1 are worn. A plane including a midline passing through the point is defined as a position crossing the shorts 1. The head apex is the highest point on the midline of the top of the human body.

  As described above, in the back body 3 of the shorts 1, one tightening region 10 in which the first tightening region 11, the second tightening region 12, and the third tightening region 13 are continuous is formed. In addition to this, as shown in FIGS. 2 and 3, in the back body 3 of the shorts 1, at least a part of the leg stretchable region 61 is a second tightening region 12 that is a part of the tightening region 10 in the groin. It is connected to at least a part. As described above, the leg stretchable region 61 is formed of a cloth different from the back body part 3a in the back body 3, and is joined to the back body part 3a by the joint 8b. By this joining, at least a part of the leg stretchable region 61 is continuous with at least a part of the second tightening region 12. Therefore, the fact that at least a part of the leg stretch region 61 is continuous with at least a part of the second tightening region 12 means that no other region is interposed between the leg stretch region 61 and the second tightening region 12, Say that both areas are in direct contact.

  The portion where the leg stretch region 61 and the second tightening region 12 are continuous is preferably located below the buttocks rear protrusion P as shown in FIG. That is, the second tightening region 12 and the leg stretchable region 61 are connected to each other at substantially the center portions of the left and right leg stretchable regions 61 in the back body 3. On the other hand, at both ends of the leg stretchable region 61, the leg stretchable region 61 is not connected to the second tightening region 12, and other regions are interposed between the leg stretchable region 61 and the second tightening region 12. ing.

  According to the shorts 1 of the present embodiment having the above-described configuration, since the tightening region 10 is tightened so as to wrap the wearer's buttocks, even if the posture of the wearer is changed, the absorbent article is maintained with high fit. Can be held in an appropriate wearing position. In addition, since the tightening region 10 and the leg stretchable region 61 are connected in the groin groove, when the posture of the wearer changes and the tightening region 10 is pulled along with the change, the leg stretchable region 61 is pulled by the pull. Pulled in conjunction. This further increases the fit and makes it easier to hold the absorbent article in an appropriate wearing position.

  From the viewpoint of making the action of tightening the tightening region 10 so as to wrap the wearer's buttocks more remarkable, as shown in FIGS. 2 and 3, the first tightening region which is a portion covering the upper part of the crack as shown in FIGS. 2 and 3. It is preferable that the region 11 extends toward the waist stretchable region 51 so that the first tightening region 11 is continuous with at least a part of the waist stretchable region 51 at the upper part of the buttock. By adopting this configuration, when the wearer's posture changes and the tightening region 10 is pulled accordingly, the waist stretchable region 51 is pulled in conjunction with the pulling. As a result, the fit of the shorts 1 is further increased.

The tightening force and stretchability of the first tightening region 11, the second tightening region 12, and the third tightening region 13 may be the same or different. Moreover, you may have a site | part which has a partly different tension | tensile_strength in each tightening area | region.
For example, the first tightening region 11 has a stronger tightening force at a position closer to the leg than the buttocks rear protrusion P, and between the portion closer to the waist than the buttocks rear protrusion P and the third tightening region 13. , You can weaken the tension more. Thereby, the fitting property by the 1st and 2nd tightening area | regions 11 and 12 and the improvement of the raising property of the shorts 1 whole can be aimed at. Alternatively, the extensibility of the shorts fabric during the forward bending operation can be improved, and the shorts 1 can be prevented from slipping out and the back exposed.

  The tightening region 10, the waist stretchable region 51, and the leg stretchable region 61 have a common function in a broad sense in that a tightening force is generated on the wearer's body when the shorts 1 is worn. However, the tightening region 10 and each of the stretchable regions 51 and 61 are clearly different in terms of the tightening force. Specifically, the tightening region 10 is made of a material having a large value of Δσ / Δε, which is the slope E in the stress σ-strain ε curve described above. That is, it is made of a material having a large elastic modulus. The above-described material having a large tension force is a material having a large Δσ / Δε value under a low elongation amount, for example, 10% elongation. The tightening region 10 is required to have a large elastic modulus, and when the force is released from the tension state, the tightening region 10 is desirably contracted to the original length or a length close thereto. In contrast, each of the stretchable regions 51 and 61 is made of a material whose Δσ / Δε, which is the slope E in the stress σ-strain ε curve, is smaller than that of the tightening region 10 when compared with the same amount of elongation. It is configured. Therefore, it can be said that each of the stretchable regions 51 and 61 has a smaller tightening force than the tightening region 10. In addition, each of the stretchable regions 51, 61 has a small stress when pulled until reaching the yield point or the break point, and when the force is released from the pulled state, the stretched region 51, 61 has an original length or a length close thereto. It is desirable to shrink.

  The stress σ-strain ε curve described above is measured along the vertical direction X or the horizontal direction Y of the shorts 1 in the tightening region 10. On the other hand, in each expansion-contraction area | region 51,61, it carries out along the circumferential direction of these area | regions 51,61. The test piece used for measurement must be selected as appropriate according to its obtainable dimensions. For example, in the case of M-sized shorts for women, the test piece that can be obtained from each of the stretchable regions 51 and 61 can be about 15 mm in the vertical direction X and 100 mm or more in the horizontal direction Y (that is, the circumferential direction). In the case of a tensile test in the circumferential direction, measurement is performed at a tensile speed of 100 mm / min and a distance between chucks of 50 mm using test pieces sampled in a longitudinal direction of 15 mm and a circumferential direction of 100 mm. In the case of a tensile test in the transverse direction Y, the longitudinal direction is 20 mm, and the transverse direction Y is a tensile rate of 100 mm / min using a test piece sampled at a transverse direction of 50 mm so that the evaluation target region is between the chucks. The measurement is performed at a distance between chucks of 20 mm.

  In the tightening region 10, the stress σ at 10% elongation is preferably 0.2 N / 20 mm or more, more preferably 0.25 N / 20 mm or more, and further 0.3 N / 20 mm or more. preferable. Further, it is preferably 2.0 N / 20 mm or less, more preferably 1.5 N / 20 mm or less, and even more preferably 1.0 N / 20 mm or less. Specifically, the stress σ at 10% elongation is preferably 0.2 to 2.0 N / 20 mm, more preferably 0.25 to 1.5 N / 20 mm, and 0.3 to 1 More preferably, it is 0.0 N / 20 mm.

  On the other hand, in each of the stretchable regions 51 and 61, the stress σ at 10% elongation is preferably independently 0.1 N / 20 mm or more, more preferably 0.15 N / 20 mm or more. More preferably, it is 2N / 20 mm or more. Further, it is preferably 1.5 N / 20 mm or less, more preferably 1.0 N / 20 mm or less, and still more preferably 0.7 N / 20 mm or less. Specifically, the stress σ at 10% elongation is preferably 0.1 N / 20 mm or more and 1.5 N / 20 mm or less independently, and more preferably 0.15 N / 20 mm or more and 1.0 N / 20 mm or less. Preferably, it is 0.2 N / 20 mm or more and 0.7 N / 20 mm or less.

  In the back body part 3a, the fact that there is a difference in stretchability between the tightening region 10 and a region other than the tightening region 10 is that the tightening force caused by the tightening region 10 is effective for the wearer's buttocks. It is preferable from the viewpoint of acting on. Specifically, the tightening region 10 is preferably less stretchable than the region other than the tightening region 10 in the back body portion 3a. Here, the term “stretchability” is an index indicating how much is stretched. From this viewpoint, when the stress σ-strain ε curve of the tightening region 10 is measured under the above-described conditions, the stress is 0.5 N. On the condition that the elongation at is lower than the region other than the tightening region 10, it is preferably 5% or more, more preferably 15% or more, and further preferably 25% or more. Further, it is preferably 50% or less, more preferably 40% or less, and further preferably 30% or less. Specifically, the elongation value is preferably 5% to 50%, more preferably 15% to 40%, and more preferably 25% to 30% under a stress of 0.5N. More preferably it is.

  In contrast, the region other than the tightening region 10 in the back body portion 3a is preferably 20% or more on the condition that the elongation under the stress of 0.5 N is higher than that of the tightening region 10. % Or more is more preferable, and 50% or more is still more preferable. Examples of the region other than the tightening region 10 include a low tightening region 15 described later.

  As shown in FIGS. 2 and 3, in the back body part 3a, the tightening region 10 preferably further includes a fourth tightening region 14 in addition to the first to third tightening regions 11-13. The fourth tightening region 14 includes an upper tightening region that extends outward in the lateral direction Y from the upper end region of the first tightening region 11. Specifically, the fourth tightening region 14 is arranged continuously with the waist stretchable region 51 so as to extend along the direction in which the waist stretchable region 51 extends. In this way, by configuring the tightening region 10 from the first to fourth tightening regions 11-14, the tightening region 10 can be tightened so as to wrap almost the entire area around the buttocks, so even if the wearer's posture changes, The absorbent article can be easily held at an appropriate wearing position while maintaining a higher fit.

  As described above, when the tightening region 10 of the back body main body 3a is constituted by the first to fourth tightening regions 11-14, the back body main body 3a is surrounded by these tightening regions 11-14. And a region 15 including the buttocks rear impact point is defined. This region 15 is preferably a low tightening region having a relatively lower tightening force than the tightening region 10. That is, it is preferable that the low tightening region 15 is arranged at a position including the buttocks rear protrusion point, and each tightening region 11-14 is arranged around the low tightening region 15. By providing the low tightening region 15, a difference occurs in the tightening force between the low tightening region 15 and each tightening region 11-14 located around the low tightening region 15, and each tightening region 11-14. The wrapping effect of the buttock due to is more remarkable.

  From the viewpoint of making the above effect even more remarkable, the degree of the tension force of the low tension region 15 is expressed by the value of Δσ measured under the above-described conditions, and the stress at the time of 10% elongation σ. On the condition that the value of the stress σ is lower than the tightening region 10, it is preferably 0.1 N / 20 mm or more, more preferably 0.15 N / 20 mm or more, and 0.2 N / 20 mm or more. More preferably it is. Further, it is preferably 1.5 N / 20 mm or less, more preferably 1.0 N / 20 mm or less, and still more preferably 0.7 N / 20 mm or less. Specifically, the value of the stress σ at 10% elongation in the low tightening region 15 is preferably 0.1 N / 20 mm or more and 1.5 N / 20 mm or less, and 0.15 N / 20 mm or more and 1.0 N / 20 mm. More preferably, it is more preferably 0.2 N / 20 mm or more and 0.7 N / 20 mm or less. The value of the stress σ at the time of 10% elongation is a value measured along the longitudinal direction X of the low tightening region 15.

  In the embodiment shown in FIGS. 2 and 3, the tightening region 10 composed of the tightening regions 11-14 is not completely closed, but instead, the upper end region of the third tightening region 13. And the end region of the fourth tightening region 14 may be combined to form a closed region 10, and the low tightening region 15 may be disposed in the inner region of the tightening region 10.

  As described above, the back body main body 3a is formed of a knitted fabric. The tightening regions including the tightening regions 11-14 and the low tightening region 15 forming part of the back body main body 3a. All regions other than 10 can be formed by a knitting structure such as a flat knitting, a rubber knitting, a pearl knitting, a float knitting, a double knitting knitting, and a single knitting knitting. The appearance of the knitted fabric is changed in the process of adjusting the texture such as elongation and hardness. At that time, in order to increase the tightening force of each tightening region 11-14, a thick yarn is used as the yarn, a high elastic modulus yarn is used, or the number of yarns used is increased. Method is adopted. On the other hand, in order to reduce the tightening force of the low tightening region 15 other than the tightening region 10 including the low tightening region 15, a fine yarn is used as the yarn, or a yarn having a low elastic modulus is used. A technique such as reducing the number of yarns is employed. That is, the back body 3 is composed of a knitted fabric, the knitted fabric is composed of two or more regions having different knitted structures, and a tightening region 11-14 is composed of one of the two or more regions.

  The above is the configuration of the back body 3 in the shorts 1. As described above, with respect to the front body 2, the front body portion 2 a is configured by a single knitting structure. The front body part 2a is required to be stretchable, but high tension is not required. It is preferable that the front body part 2a has the stretchability and tightness that the low tightening region 15 of the back body part 3a has. Specifically, with respect to stretchability, the elongation under a stress of 0.5 N is preferably 20% or more, more preferably 30% or more, and even more preferably 50% or more. Further, it is preferably 150% or less, more preferably 100% or less, and further preferably 80% or less. For example, the elongation value is preferably 20% or more and 150% or less, more preferably 30% or more and 100% or less, and 50% or more and 80% or less under a stress of 0.5N. Even more preferred.

  On the other hand, the tightening force of the front body portion 2a is expressed by the value of Δσ measured under the conditions described above, and the stress σ value at the time of 10% elongation is greater than the tightening region 10. On the condition of low, it is preferably 0.1 N / 20 mm or more, more preferably 0.15 N / 20 mm or more, and further preferably 0.2 N / 20 mm or more. Further, it is preferably 1.5 N / 20 mm or less, more preferably 1.0 N / 20 mm or less, and still more preferably 0.7 N / 20 mm or less. Specifically, the value of the stress σ at the time of 10% elongation in the front body portion 2a is preferably 0.1 N / 20 mm or more and 1.5 N / 20 mm or less, and 0.15 N / 20 mm or more and 1.0 N / More preferably, it is 20 mm or less, and more preferably 0.2 N / 20 mm or more and 0.7 N / 20 mm or less. The value of the stress σ at the time of 10% elongation is a value measured along the longitudinal direction X of the front body part 2a.

  In the shorts 1 of the present embodiment, a low tightening region 15 which is a part of the back body main body 3a is connected to the front body 2a at the boundary between the front body 2 and the back body 3. However, this does not mean that the tightening force and / or stretchability are always the same in the low tightening region 15 and the front body portion 2a. The low tightening region 15 and the front body portion 2a may have the same or different tightening force. The same applies to stretchability.

  Considering the forward bending and backward bending of the body, the deformation amount of the skin from the buttocks to the back side becomes larger than the deformation amount of the skin on the abdominal side. For this reason, the deformation amount of the back body needs to be larger than the longitudinal deformation amount of the front body. In order to express comfortable wearing without being accompanied by movement of the body, a ratio of (longitudinal stretch amount of the front body portion 2a) / (longitudinal stretch amount of the low tightening region 15 in the back body portion 3a) Is preferably 1.3 / 2.0 or more and 1.5 / 1.7 or less.

  The ratio of (longitudinal stretch amount of the front body portion 2a) / (longitudinal stretch amount of the low tightening region 15 in the back body portion 3a) is measured as follows. As with the other measurements described above, it must be selected as appropriate depending on the dimensions available for the specimen. For example, in the case of shorts equivalent to M size for women, the test pieces obtainable from the low tightening region 15 in the front body part 2a and the back body part 3a are both 100 mm in the vertical direction X and 30 mm in the horizontal direction Y. Sampling is possible. In the case of a tensile test, measurement is performed at a tensile speed of 100 mm / min and a distance between chucks of 50 mm using a test piece sampled at a longitudinal direction of 100 mm and a lateral direction of 20 mm, and the maximum elongation at which elongation has stopped is read. Elongation amount. Measurement is performed at 5 points, and the average value is taken as the measured value. In the obtained measurement value, when a difference of ± 20% or more with respect to the average value of samples with little variation is generated, the measurement value is invalidated and additional measurement is performed.

  The crotch portion 4 disposed between the front body 2 and the back body 3 is made of a cloth different from the front body 2 and the back body 3, and is joined to the front body 2 and the back body 3 by a joint 8c. Are joined by. The joint portion 8c is formed by, for example, sewing. The crotch part 4 can be composed of, for example, a knitted fabric. However, it is not restricted to this, You may comprise the crotch part 4 from a woven fabric. In some cases, the crotch portion 4 may be waterproofed.

  At each side edge in the width direction Y of the crotch portion 4, a part of the above-described leg stretchable region 61 is located adjacently. The crotch part 4 and the leg expansion / contraction area | region 61 are joined by the junction part 8d. The joint portion 8c is formed by, for example, sewing.

  The crotch portion 4 preferably has stretchability. In this case, the entire region of the crotch portion 4 may have the same stretchability, or the stretchability may be different for each portion of the crotch portion 4. For example, as shown in FIG. 4, when the crotch portion 4 is viewed along the width direction Y, the central region 4a in the width direction Y is adjacent to the central region 4a and is located outside the central region 4a in the width direction Y. The pair of side regions 4b and 4b located on the sides may have different stretchability.

  In the wearing state of the shorts 1, an absorbent article (not shown) is attached to the crotch portion 4. In order to enhance the retention of the absorbent article and make it difficult for the absorbent article to be displaced during mounting, it is preferable to arrange a shape retaining piece in the crotch portion 4. For example, one shape-retaining piece can be arranged on a longitudinal center line that bisects the crotch portion 4 to the left and right. Alternatively, a pair of crotch portions may be arranged with a vertical center line that bisects the crotch portion to the left and right. For example, the shape retaining piece is preferably a plate-like body having a thickness that does not cause discomfort and a certain degree of rigidity. As such a plate-like body, for example, a plurality of nonwoven fabrics are superposed and each nonwoven fabric is joined and integrated in a discontinuous joining pattern, and at least one of the nonwoven fabrics is heat-fusible. A nonwoven fabric in which the intersections of the constituent fibers are joined by the composite fibers can be used. It is preferable that the shape-retaining piece has a vertically long shape whose length is larger than its width, and is arranged so that its length direction coincides with the vertical direction of the shorts 1.

  It is preferable that the shape retaining piece is made of a material having higher rigidity than the cloth constituting the crotch portion 4. By placing the shape retaining piece on the crotch part 4, the rigidity of the crotch part 4 increases, and even if the wearer moves vigorously while wearing the shorts 1 to which the absorbent article is fixed, it is fixed to the shorts 1. Twist and misalignment of the absorbent article is less likely to occur. As a result, liquid leakage is less likely to occur. Moreover, since rigidity is provided to the crotch part 4 to which the absorbent article is fixed, for example, when fixing the absorbent article having a wing part to the shorts 1, a fastening adhesive applied to the wing part is provided. It is effectively prevented from clinging to the hand or sticking to a position other than the proper position of the shorts, and the wing portion can be folded back and attached to the crotch portion 4 easily.

  4 and 5 show an example of the arrangement state of the shape retaining piece 20 in the crotch portion 4. FIG. In FIG. 4, each shape retaining piece 20 is arranged at the position of the central region 4 a in the crotch portion 4. Each shape-retaining piece has a curved shape along the left and right side edges 4a 'and 4a' of the central area 4a. In FIG. 5, each shape retaining piece 20 is disposed on the joint portion 8 d so as to straddle the side region 4 b of the crotch portion 4 and the leg stretchable region 61. Each shape-retaining piece 20 extends along the vertical direction X.

  In the embodiment shown in FIGS. 4 and 5, each shape-retaining piece 20 can be disposed between the fabrics when the crotch portion 4 is configured by overlapping a plurality of fabrics. Or it can also arrange | position on the surface of the crotch part 4, ie, a wearer's skin opposing surface, or a non-skin opposing surface.

As an absorbent article attached to the crotch part 4, an article capable of absorbing and retaining excreted body fluid can be used without particular limitation. Examples of such absorbent articles include incontinence pads used for absorption of urine and sanitary napkins and pantilinas used for absorption of menstrual blood and vaginal discharge. These absorbent articles are generally located on the skin-facing surface side of the wearer and have a liquid-permeable surface sheet, located on the non-skin-facing surface side, and a liquid-impermeable or hardly-permeable back sheet. And a liquid-retaining absorber disposed between both sheets. A liquid-permeable sheet called a second sheet may be disposed between the top sheet and the absorber. The absorbent body may include a water-absorbing polymer that is a hydrogel material capable of absorbing and retaining moisture. In addition to the water-absorbing polymer, the absorbent body may contain absorbent or swellable hydrophilic fiber materials such as pulp, rayon and polyvinyl alcohol, or thermoplastic fibers such as polyethylene, polypropylene and polyethylene terephthalate.
The top sheet and the back sheet have a peripheral joint part in which at least a part of a part extending from the peripheral part of the absorbent body is joined to each other at the peripheral part of the absorbent article.

  The absorbent article generally has a vertically long shape having a longitudinal direction and a width direction perpendicular thereto. On the skin facing surface of the absorbent article, a pair of leak-proof cuffs extending in the longitudinal direction can be disposed on both sides in the width direction. The leak-proof cuff has a propensity to stand, thereby preventing leakage of menstrual blood excreted on the skin-facing surface.

  The absorbent body in the absorbent article has, for example, an absorbent core containing the above-described water-absorbing polymer, and a covering sheet that covers the absorbent core. A covering sheet can be comprised from the fiber sheet which has liquid permeability, such as tissue paper and a nonwoven fabric, for example. As the top sheet and back sheet of the absorbent article, the same type of material as that conventionally used for this type of article can be used without particular limitation. For example, as the top sheet, a sheet having liquid permeability, such as a nonwoven fabric or a perforated film, can be used. As the back sheet, for example, a liquid-impermeable film, or a spunbond / meltblown / spunbond laminated nonwoven fabric that is a liquid-impermeable sheet can be used. A plurality of fine holes may be provided in a liquid-impermeable film to impart water vapor permeability to the film.

  As described above, the shorts 1 of the present embodiment is tightened so that the tightening region 10 wraps around the buttocks of the wearer. Therefore, even if the posture of the wearer changes, the absorbent article remains high in fitting property. Can be held in an appropriate wearing position. Accordingly, the absorbent article in the mounted state receives pressure from the tightening region 10. In order not to impair the water absorption property of the absorbent article due to being subjected to pressure, it is advantageous to use a water-absorbing polymer that is difficult to cause gel blocking under pressure as the water-absorbing polymer contained in the absorbent body. . From this viewpoint, the water-absorbing polymer preferably has a liquid passing rate under pressure at 2.0 kPa of 50 ml / min or more, and more preferably 60 ml / min or more. Moreover, it is preferable that it is 200 ml / min or less, and it is still more preferable that it is 150 ml / min or less. The liquid passing rate under pressure is preferably 50 ml / min or more and 200 ml / min or less, more preferably 60 ml / min or more and 150 ml / min or less. The applied pressure of 2.0 kPa substantially corresponds to the pressure applied to the absorbent body through the tightening region 10 when the absorbent article is worn.

  The liquid passing rate under pressure is measured using a measuring method and a measuring apparatus described in JP-A-2003-235889. Specifically, the flow rate under pressure at 2.0 kPa is measured by the following procedure. These measurements are performed at 23 ± 2 ° C. and a relative humidity of 50 ± 5%, and the sample is stored after being stored in the same environment for 24 hours or more.

[Measurement method of liquid flow rate under pressure]
In a 100 mL glass beaker, a sufficient amount of physiological saline (0.9% by mass sodium chloride water) to swell the measurement sample water-absorbing polymer 0.32 ± 0.005 g, for example, the saturated absorption amount of the water-absorbing polymer. Immerse it in 5 times more saline and leave it for 30 minutes.
Separately, at the lower end of an opening of a vertically standing cylinder (inner diameter 25.4 mm), a wire mesh (mesh opening 150 μm, biocolumn sintered stainless steel filter 30SUS sold by Sansho Co., Ltd.) and a capillary (with an inner diameter of 2 mm) ( A filtration cylindrical tube having an inner diameter of 4 mm and a length of 8 cm) is prepared, and the contents of the beaker including the swollen measurement sample are put into the cylindrical tube with the cock closed. Next, a cylindrical rod having a diameter of 2 mm with a wire mesh having an opening of 150 μm and a diameter of 25 mm is inserted into the filtration cylindrical tube so that the wire mesh and the measurement sample are in contact with each other. Place a weight so that the load of. After standing in this state for 1 minute, the cock is opened to flow the liquid, and the time until the liquid level in the filtration cylindrical tube reaches the 40 mL scale line from the 60 mL scale line (that is, 20 mL of liquid passes) (T ₁ ) (Seconds). Using the measured time T ₁ (seconds), the liquid passing speed at 2.0 kPa is calculated from the following equation. In the equation, T ₀ (seconds) is a value obtained by measuring the time required for 20 ml of physiological saline to pass through the wire mesh without putting the measurement sample in the filtering cylindrical tube.
Flow rate (ml / min) = 20 × 60 / (T ₁ −T ₀ )
The value obtained by the above formula is divided by the thickness of the swollen water-absorbing polymer layer in the cylinder, and converted to a value per 20 mm to obtain a liquid passing speed under pressure. The measurement was performed 5 times (n = 5), the values at each of the upper and lower points were deleted, and the average value of the remaining three points was taken as the measured value.
A more detailed method for measuring the flow rate is described in paragraphs 0008 and 0009 of JP-A-2003-235889. The measuring device is described in FIGS. 1 and 2 of the publication.

  From the same viewpoint that it is preferable to set the liquid passing rate under pressure in the above range, the water-absorbing polymer preferably has an absorption amount under pressure at 2.0 kPa of 25 g / g or more, and 30 g / g. It is still more preferable that it is above. Moreover, it is preferable that it is 60 g / g or less, and it is still more preferable that it is 55 g / g or less. The amount absorbed under pressure is preferably 25 g / g or more and 60 g / g or less, and more preferably 30 g / g or more and 55 g / g or less. The amount of absorption under pressure is a measure of how much the water-absorbing polymer can be absorbed in a state where pressure is applied to the absorbent body by wearing the absorbent article.

The amount of absorption under pressure is measured using a measuring method and measuring apparatus described in JP-A-2003-235889. Measurement is performed as follows in an environment of 25 ± 2 ° C. and a relative humidity of 50% ± 5%.
That is, a sample of 0.10 g was weighed in a cylindrical plastic tube (inner diameter 30 mm, height 60 mm) with a nylon mesh (JIS Z8801-1: 2000) having a mesh size of 63 μm attached to the bottom, and the cylindrical plastic tube was placed vertically to make nylon. The sample is arranged on the net so as to have a substantially uniform thickness, and a weight of 29.5 mm in outer diameter and 22 mm in thickness is inserted into the cylindrical plastic tube so that a pressure of 2.0 kPa is applied to the sample. The mass of the cylindrical plastic tube and the weight is measured in advance.
Next, a cylindrical plastic tube containing a sample and a weight in a petri dish (diameter: 120 mm) containing 60 ml of physiological saline is vertically immersed with the nylon mesh side as the bottom surface. At this time, the cylindrical plastic tube is immersed to the depth of the bottom of the petri dish.
After 60 minutes, the cylindrical plastic tube containing the sample and the weight is pulled up from the water, the mass is weighed, the mass of the cylindrical plastic tube and the weight previously measured is subtracted, and the mass of the physiological saline absorbed by the sample is calculated. . A value obtained by multiplying the mass of the absorbed physiological saline by 10 is defined as an absorbed amount under pressure (g / g).

  From the same viewpoint that it is preferable to set the liquid flow rate under pressure and the amount of absorption under pressure within the above-mentioned ranges, the water-absorbing polymer should have a water absorption rate of 30 seconds or less by the vortex method (VORTEX method). Preferably, it is 25 seconds or less. The water absorption rate is preferably 5 seconds or more. The water absorption rate by the vortex method is preferably 5 seconds or more and 30 seconds or less, and more preferably 5 seconds or more and 25 seconds or less. The vortex method is known as a method for showing the ability to fix a liquid when the water-absorbing polymer is forcibly exposed to the liquid.

  The water absorption rate by the vortex method is measured by the method described below. That is, a 100 mL glass beaker is coated with 50 mL of physiological saline (0.9% by mass sodium chloride water) and a magnetic stirrer chip (center diameter 8 mm, both end diameter 7 mm, length 30 mm, and the surface is coated with fluororesin. The beaker is placed on a magnetic stirrer (HPS-100 manufactured by ASONE). The rotational speed of the magnetic stirrer is adjusted to 600 ± 60 rpm, and the physiological saline is stirred. 2.0 g of the water-absorbing polymer as a measurement sample is put into the liquid at the center of the vortex of the saline solution being stirred, and the water absorption rate (seconds) of the water-absorbing polymer is measured in accordance with JIS K 7224 (1996). taking measurement. Specifically, the stopwatch is started when the absorption of the water-absorbing polymer into the beaker is completed, and stopped when the stirrer tip is covered with the test liquid (when the vortex disappears and the liquid surface becomes flat). Stop the watch and record the time (in seconds) as the water absorption rate by vortex method. In the measurement, n = 5 was measured, the values at each of the upper and lower points were deleted, and the average value of the remaining three points was taken as the measured value. These measurements are performed at 23 ± 2 ° C. and a relative humidity of 50 ± 5%, and the sample is measured after being stored in the same environment for 24 hours or more.

  In the shorts 1 of the present embodiment, since the tightening region 10 tightens the wearer's buttocks, if the absorbent article attached to the shorts 1 is excessively thick, a feeling of discomfort may occur. Moreover, when an absorbent article is excessively thick, there is a possibility that the outer will crack in its mounted state. From these viewpoints, the thickness of the absorbent body in the absorbent article is preferably 1 mm or more and 4 mm or less, and more preferably 1.5 mm or more and 3 mm or less. In particular, when the absorbent article is used as an incontinence pad, the thickness of the absorber is preferably 0.5 mm or more and 4 mm or less, and more preferably 1 mm or more and 3 mm.

  The thickness of the absorber is measured under a state where a weight is placed on an acrylic plate having a size of 5 cm × 5 cm on the absorber and a load of 0.245 kPa is applied. As the measuring device, for example, LK080 class 2 laser displacement meter manufactured by Keyence Corporation can be used. The number of measurement points is an average of 5 points, and if the measured value fluctuates 20% or more, the data is deleted and another measured value is added. A 24.5 kPa load is applied to the sample in advance for 12 hours to keep the wrinkles extended.

In relation to the thickness of the absorbent body, the basis weight of the absorbent body is 35 g / m ² or more when the absorbent article is used as an incontinence pad. It is preferably 500 g / m ² or less, more preferably 50 g / m ² or more and 400 g / m ² or less.

  Although it is related to the thickness of the absorber, the absorber preferably has a relatively low bending rigidity. Because the bending rigidity of the absorbent body is low, when the tightening region 10 of the shorts 1 tightens the wearer's buttocks, the tightening force is effectively transmitted to the absorbent body, and the absorbent body follows the shape of the wearer's body. Will be deformed smoothly. From this viewpoint, the flexural rigidity value of the absorbent body is preferably 50 g or less, and more preferably 40 g or less. The bending rigidity value is preferably 10 g or more. The bending stiffness value of the absorber is preferably 10 g or more and 50 g or less, and more preferably 10 g or more and 40 g or less. This bending rigidity value is a value when bent so that a fold line is formed along the width direction of the absorber.

  The bending stiffness value of the absorber can be measured with a handle-ometer. The measuring method using the handle-ometer is in accordance with Japanese Industrial Standard “JIS L-1096 (General Textile Testing Method)”. A square-shaped absorbent body cut to 100 mm in the longitudinal direction of the absorbent article and 100 mm in the width direction of the absorbent article on a support table in which a groove having a width of 30 mm is cut has a direction corresponding to the longitudinal direction of the absorbent article. The grooves are arranged so as to be parallel to the extending direction. The center of the absorber is pushed with a blade having a thickness of 2 mm, and the resistance value (g) when the absorber is pushed in by 8 mm is measured with a load cell. The average value of the three points is taken as the measured value. As a measuring device, for example, a hand tester (handle-and-meter method) HOM-2 manufactured by Daiei Kagaku Seiki Seisakusho can be used.

In the shorts 1 of this embodiment, since the tightening region 10 tightens the wearer's buttocks, the frictional resistance of the skin-facing surface of the absorbent article attached to the shorts 1 is reduced, and the skin-facing surface and the wearer's It is preferable to reduce the uncomfortable feeling caused by rubbing with the skin. From this viewpoint, the average friction coefficient (MIU) of the skin facing surface including the surface sheet in the absorbent article is preferably 0.210 or less, and more preferably 0.200 or less. The average friction coefficient is evaluated using a KES-SE surface friction tester (manufactured by Kato Tech). Specifically, the friction element is moved at a speed of 20 mm / sec under a state in which a load of 5 kPa (50 gf / cm ² ) is applied to the skin-facing surface of the absorbent article including the topsheet by a friction element. The average coefficient of friction (unit: dimensionless, symbol: MIU) is measured. The value is taken as the average friction coefficient. The average coefficient of friction indicates the degree of smoothness of the surface, and a smaller value means that the surface is smoother. The coefficient of friction is measured in a state where the top sheet is incorporated in the absorbent article. A test piece cuts out the absorption part in which an absorber exists in an inside in an absorptive article with a surface sheet and a back sheet, and makes it a test piece. The coefficient of friction is measured by applying a friction element to the surface of the top sheet that faces the wearer's skin.

Moreover, in the shorts 1 of this embodiment, since the tightening area | region 10 clamps a wearer's buttocks, it is preferable to raise the air permeability of the absorbent article with which this shorts 1 is mounted | worn, and to suppress generation | occurrence | production of stuffiness. From this point of view, the degree of breathability of the absorbent article is represented by the ventilation resistance value (per 100 g / m ^{2 of} superabsorbent polymer) in the thickness direction region extending from the skin contact surface side of the absorbent article to the absorbent body. Thus, it is preferably 0.4 kPa · s / m or less, more preferably 0.3 kPa · s / m or less. The smaller the ventilation resistance value, the higher the air permeability. There is no restriction | limiting in particular in the minimum of ventilation resistance value, and the air permeability becomes high, so that the value is small. The ventilation resistance value is measured by an air permeability tester KES-F8 (trade name) manufactured by Kato Tech. According to this apparatus, the pressure loss when a constant flow rate of air (4 cc square cm / sec) is passed is measured. The measured ventilation resistance value is converted into a value per 100 g / m ^{2 of the} superabsorbent polymer.

Further, from the viewpoint of suppressing the uncomfortable tightening caused by the tightening region 10 of the shorts 1, the absorbent body of the absorbent article as a whole has a compression work (WC value) of 0 in the thickness direction by the KES compression tester. is preferably .98cN · cm / cm ² or more, more preferably 1.47cN · cm / cm ² or more. The compression work is measured using a KES-G5 handy compression tester manufactured by Kato Tech. The measurement method is as follows. A test piece of 5 cm × 10 cm is prepared and attached to a test bench. The specimen is compressed between steel plates having a circular plane with an area of 2 cm ² . The compression speed is 20 μm / sec. The maximum compression load is 4.9 kPa. The recovery process is also measured at the same rate. The compression work WC is expressed by the following equation.

As described above, by controlling various physical properties of the absorbent article attached to the shorts 1, it is possible to effectively suppress the occurrence of uncomfortable feelings when the absorbent article is attached, and to the skin. Damage can be effectively reduced. The degree of damage to the skin can be evaluated by measuring TEWL (transdermal moisture transpiration). Specifically, TEWL indicates the amount of water (g / m ² / hr) that evaporates from the skin, and it is generally said that the higher the value, the lower the barrier function of the skin. Therefore, the degree of damage to the skin before and after the absorbent article is mounted is evaluated by the method described below. The value of ΔTEWL thus determined is preferably 2.5 g / m ² / hr or less, more preferably 2.0 g / m ² / hr or less, and 1.5 g / m ² / hr. More preferably, it is as follows. TEWL is measured using a multi-probe adapter MPA5 with a Tevameter TM300 (both made by Courage + Khazaka electric GmbH). The inside of the adult forearm is used as the test site at 23.2 ° C. and humidity is 47% RH. Under the conditions of

<Cleaning / acclimation treatment>
After washing the inside of the forearm thoroughly with a commercially available mild facial cleanser, rinse thoroughly with water. The washed water is gently wiped with Kim Towel (registered trademark) manufactured by Nippon Paper Crecia Co., Ltd. Then, acclimatize for 15 minutes in an environment variable room at 25 ° C. and humidity 50% RH.
<Abrasion treatment>
The top sheet of the absorbent article is rubbed against the inner side of the adult forearm that has been cleaned and conditioned as described above. Specifically, a cylindrical weight 1 having a bottom surface diameter of 5 cm (load 45 g / cm ² ) was used, and as shown in FIG. Is attached so that it faces downward, and the top sheet 2 is attached by rubber 3 on the side surface of the weight 1 and fixed. The face sheet 2 in this state is brought into contact with the inner part of the adult forearm, and under this state, the finger 1 is rotated six times in one reciprocation of 10 cm so that the weight 1 rotates in one direction around the axis. move. This operation is performed in an environment variable room at 25 ° C. and humidity 50% RH.
By subtracting the value of TEWL after rubbing from the value of TEWL before rubbing, the amount of change in TEWL (ΔTEWL = the value of TEWL before rubbing by the absorbent article−the value of TEWL after rubbing) is obtained. In the measurement of TEWL, an average value of three measurement values is used as a measurement value.

  According to the shorts 1 of the present embodiment, by wearing this, incontinence symptoms can be improved by tightening due to the tightening region 10 of the shorts 1. In this case, even if the incontinence symptom is improved, if the absorbent article attached to the shorts 1 has a moist feeling, it may be difficult for the wearer to realize the improvement of incontinence. From this point of view, the absorbent article preferably has a liquid return amount of 0.5 g or less, more preferably 0.3 g or less after absorbing the display absorption amount of water. The “displayed absorption amount” is a standard liquid absorption amount (volume or mass) of the absorbent article displayed on a package or the like that wraps the absorbent article.

The liquid return amount is measured by the following method. The target absorbent article is spread on a flat surface and placed on a laboratory table, and an acrylic cylindrical portion having a cylinder inner diameter of 22 mmφ and a cylinder height of 50 mm is positioned on the 10 mmφ injection opening on the absorbent article. Place the integrally injected acrylic injection plate so that the injection hole is located in the center of the crotch on the skin facing surface (surface sheet side) of the absorbent article, and place an appropriate weight plate Adjust so that the load (including the liquid injection plate itself) is 5 g / m ² . Artificial urine is acclimatized at room temperature (23 ° C.) in advance, and the amount of display absorption is measured in an injection beaker. This artificial urine is poured all at once into the cylinder of the liquid injection plate, and 20 sheets of 4A filter paper made by Toyo Roshi Kaisha, Ltd. are stacked on the injection site (the center of the crotch portion on the skin-facing surface of the absorbent article). A load is applied for 10 minutes to absorb the artificial urine on the filter paper. The load is such that 6 kg is applied to an area of 30 cm × 15 cm. After 10 minutes, the load is removed, and the mass of the filter paper that has absorbed artificial urine is measured. The mass of the filter paper before absorption is subtracted from this mass, and the mass of artificial urine absorbed by the filter paper is calculated as the liquid return amount. Each absorbent article is measured three times, and the average value is taken as the liquid return amount of the diaper.
Known artificial urine can be used as artificial urine to be absorbed by the absorbent article. For example, artificial urine having the composition described in paragraph [0025] lines 11 to 16 of JP-A-2009-178411 can be used. Artificial urine is 1.94% by mass of urea, 0.795% by mass of sodium chloride, 0.11% by mass of magnesium sulfate, 0.062% by mass of calcium chloride, 0.197% by mass of potassium sulfate, Red No. 2 (dye) 0 0.010% by mass, water 96.88% by mass and polyoxyethylene lauryl ether (about 0.07% by mass), and the surface tension was adjusted to 53 ± 1 dyne / cm (23 ° C.).

From the same viewpoint as the liquid return amount described above, it is easy for the wearer of the absorbent article to realize the improvement of incontinence that the absorbent article has a high feeling even after absorption of the liquid. The smoothness of the absorbent article can be evaluated by measuring the amount of heat transfer using a BT-Box (Bottom Temperature Box). BT-Box is well known in the art as a sensor used for measuring thermophysical properties. The BT-Box includes a hot plate that is a part that contacts the measurement object. The BT-Box includes means for supplying heat to the hot plate, for example, a heater, and a sensor for detecting the temperature of the hot plate so that the hot plate can always be kept at a set temperature. ing. In the present invention, as BT-Box, the one provided in THERMO LABO II (KES-F7), which is a precise rapid thermophysical property measuring apparatus manufactured by Kato Tech, is used. The area of the hot plate in this BT-Box is 25 cm ² . 40 g of artificial urine is injected all at once into the central area of the skin facing surface of the absorbent article, and after 20 seconds from the start of injection, BT-Box is placed on the artificial urine injection portion on the skin facing surface of the absorbent article. When the amount of heat transferred from the BT-Box to the absorbent article under load of 1.0 kPa is measured over time, the maximum value of the measured heat transfer amount is preferably 3 W or less. , 2.5 W or less is more preferable, and 2 W or less is more preferable. Details of the method of measuring the amount of heat using BT-Box are described in, for example, Japanese Patent Application Laid-Open No. 2009-178411.

  In order to set the above-mentioned liquid return amount and the amount of heat using BT-Box in the above-mentioned range, for example, a water-absorbing polymer having the above-described physical property values is used, or the thickness and bending rigidity value of the absorber are set as described above. The range may be set, or the blending ratio of the water-absorbing polymer and the hydrophilic fiber constituting the absorber may be adjusted.

  In the shorts 1 of this embodiment, since the crotch part 4 pushes up the wearer's pelvis bottom, when the absorbent article is attached to the shorts 1, the wearer operates with the absorbent article attached. The periphery of the absorbent article may irritate the wearer's skin and cause discomfort. Therefore, for the purpose of suppressing the occurrence of such discomfort, as shown in FIG. 7, in the peripheral joint portions 91a and 92a formed at the front end portion 91 and / or the rear end portion 92 in the longitudinal direction X of the absorbent article 90, It is preferable to form non-joining portions 91b and 92b extending in the width direction at the tips (ends in the longitudinal direction) of the peripheral joint portions 91a and 92a. In the non-joining portions 91b and 92b, the top sheet and the back sheet are in a non-joined state. In particular, the non-joint portions 91b and 92b preferably have a length along the vertical direction X of 2 mm or more and 20 mm or less, particularly 5 mm or more and 15 mm or less, from the viewpoint of effectively preventing the occurrence of discomfort. In order to maintain the shape of the absorbent article 90, a sheet material (for example, a front sheet or a back sheet) is joined to another sheet material or the like in an inward region from the peripheral edge to the center of the absorbent article. It is in a state. In this case, in the non-joining portions 91b and 92b, the sheet material (for example, the front sheet or the back sheet) constituting the absorbent article 90 is in a non-joined state with other sheet materials or the like.

  For the same reason as described above, in the front region 93 and / or the rear region 94 of the absorbent article 90, the side edge portions 93a and 94a connected to the front end portion 91 and / or the rear end portion 94 are also side end portions. It is preferable to form a non-joining portion (not shown) extending in the longitudinal direction at the (end in the width direction). In the non-bonded portion, the top sheet and the back sheet are in a non-bonded state, and the sheet material (for example, the top sheet or the back sheet) constituting the absorbent article 90 is not in contact with other sheet materials or the like. Joined state. In particular, the length of the non-joined portion along the lateral direction Y is preferably 10 mm or more and 100 mm or less, and particularly preferably 20 mm or more and 50 mm or less from the viewpoint of effectively preventing a sense of discomfort.

  Further, for the same reason as described above, the ratio of the length of the portion where the joint portion is formed in the peripheral edge of the absorbent article to the peripheral length of the absorbent article 90 is preferably 90% or less, and 85% or less. More preferably, it is more preferably 80% or less. Further, the ratio is preferably 50% or more, more preferably 60% or more, and further preferably 65% or more. The ratio is preferably 50% to 90%, more preferably 60% to 85%, and still more preferably 65% to 80%.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, the shorts 1 of the above embodiment has a shape in which the opening end of the leg opening 6 is located near the base of the wearer's thigh, but instead, the opening end of the leg opening 6 is used. However, the shape may be a so-called half length, which is located below the base of the wearer's thigh.

The present invention further discloses the following sanitary shorts with respect to the embodiment described above.
<1>
A sanitary short having a longitudinal direction which is a direction extending through a crotch portion between a front body and a back body, and a lateral direction perpendicular thereto, and the absorbent article is used by being attached to the crotch portion. ,
The back body has a tightening region having a relatively high tightening force compared to other regions in the back body, and the tightening region has a crack, a ridge groove, and a buttocks at a position below the rear end of the buttocks. A shape that covers the side part continuously,
An annular leg stretchable region along the opening end is formed at the opening end of the leg opening,
Sanitary shorts in which at least a part of the leg stretchable region is continuous with at least a part of the tightening region in the ridge.

<2>
<1>, wherein the back body is composed of a knitted fabric, the knitted fabric is composed of two or more regions having different knitted structures, and the tightening region is composed of one of the two or more regions. Sanitary shorts.
<3>
An annular waist stretchable region along the opening end is formed at the opening end of the waist opening,
Of the tightening region, a portion covering the crack extends toward the waist stretchable region, whereby the portion is continuous with at least a part of the waist stretchable region at the upper portion of the heel portion. 2> Sanitary shorts.
<4>
The sanitary shorts according to any one of <1> to <3>, wherein the tightening region has lower elasticity than the region other than the tightening region in the back body.
<5>
The back body has a low tightening region having a relatively lower tightening force than the tightening region;
The sanitary shorts according to any one of <1> to <4>, wherein the low tightening region is disposed at a position including a buttock rear protrusion, and the tightening region is disposed around the low tightening region. .
<6>
The tightening region extending in a longitudinal direction along the crack;
A pair of ridge groove tightening regions extending laterally outward from the lower end region of the crack tightening region and extending laterally along the ridge groove;
The sanitary shorts according to any one of <1> to <5>, further including a pair of side portion tightening regions extending from the end region of the ridge groove tightening region in the vertical direction.

<7>
The sanitary shorts according to <6>, wherein at least a part of the leg stretchable region is continuous with at least a part of the sulcus tightening region.
<8>
The sanitary shorts according to <6> or <7>, further including an upper tightening region that extends laterally outward from an upper end region of the crack tightening region.
<9>
A pair of plate-shaped shape retaining pieces are arranged on the crotch portion with a vertical center line that bisects the crotch portion left and right,
The shape-retaining piece is formed by superimposing a plurality of nonwoven fabrics, and each nonwoven fabric is joined and integrated in a discontinuous joining pattern, and at least one of the nonwoven fabrics is constituted by a heat-fusible conjugate fiber. The sanitary shorts according to any one of <1> to <8>, wherein the sanitary shorts are made of a nonwoven fabric to which fiber intersections are bonded.
<10>
Has a waist opening,
In the waist opening, an annular waist stretchable region along the opening end is formed at the opening end,
The sanitary shorts according to any one of <1> to <9>, wherein the waist stretchable region has a shape of an annular band having a predetermined width and has stretchability along a circumferential direction thereof. .
<11>
Has a waist opening,
The cylindrical waistline portion between the waist opening and the pair of leg openings is formed of a common knitted fabric in which a knitted fabric forming a front body and a knitted fabric forming a back body are continuous. The sanitary short according to any one of <1> to <10>.
<12>
Has a waist opening,
A cylindrical waistline portion between the waist opening and the pair of leg openings;
The sanitary shorts according to any one of <1> to <11>, wherein a joint portion in which knitted fabrics are joined by stitching or the like is not formed in a circumferential direction of the waistline portion.
<13>
Has a waist opening,
In the waist opening, an annular waist stretchable region along the opening end is formed at the opening end,
A cylindrical waistline portion between the waist opening and the pair of leg openings;
The waist stretchable region and the leg stretchable region are composed of a fabric different from the fabric constituting the waistline portion,
The sanitary shorts according to any one of <1> to <12>, wherein the waist stretchable region, the leg stretchable region, and the waistline portion are joined at a joined portion by joining means such as stitching.

<14>
Has a waist opening,
In the front body, the sanitary shorts according to any one of <1> to <13>, wherein the front body main body excluding the waist opening and the leg opening is configured by a single knitting structure.
<15>
Has a waist opening,
The back body is composed of a plurality of knitting structures of the back body main body excluding the waist opening and the leg opening,
Although the plurality of knitting structures are different from each other, they constitute one continuous knitted fabric, and there is no joint portion such as a stitched portion between adjacent knitting structures. > Sanitary shorts according to any one of <14>.
<16>
Has a waist opening,
The back body is composed of a plurality of knitting structures of the back body main body excluding the waist opening and the leg opening,
One of the knitted structures is the tightening region having a relatively higher tightening force than the other region of the back body main body part, according to any one of the above <1> to <15> Sanitary shorts.
<17>
The tightening region is composed of a first tightening region that covers the crack, a pair of second tightening regions that respectively cover the pair of grooving grooves, and a pair of third tightening regions that cover the side of the buttocks,
The sanitary shorts according to any one of the above items <1> to <16>, wherein a portion where the leg stretchable region and the second tightening region are connected is located below the buttocks rear protrusion.
<18>
Has a waist opening,
In the waist opening, an annular waist stretchable region along the opening end is formed at the opening end,
In the waist stretch region and the leg stretch region, the stress σ at 10% elongation is preferably independently 0.1 N / 20 mm or more, more preferably 0.15 N / 20 mm or more. More preferably, it is 2 N / 20 mm or more, more preferably 1.5 N / 20 mm or less, still more preferably 1.0 N / 20 mm or less, and even more preferably 0.7 N / 20 mm or less. Preferably
The stress σ at 10% elongation is preferably 0.1 N / 20 mm or more and 1.5 N / 20 mm or less, more preferably 0.15 N / 20 mm or more and 1.0 N / 20 mm or less. The sanitary short according to any one of <1> to <17>, wherein it is more preferably 2 N / 20 mm or more and 0.7 N / 20 mm or less.
<19>
When the stress σ-strain ε curve of the tightening region is measured, it is preferably 5% or more on the condition that the elongation under a stress of 0.5 N is lower than the region other than the tightening region, More preferably, it is 15% or more, more preferably 25% or more, more preferably 50% or less, further preferably 40% or less, and further preferably 30% or less. ,
The elongation value is preferably 5% or more and 50% or less, more preferably 15% or more and 40% or less, and further preferably 25% or more and 30% or less under a stress of 0.5N. The sanitary short according to any one of <1> to <18>.

<20>
The region other than the tightening region in the back body portion is preferably 20% or more, preferably 30% or more, provided that the elongation under a stress of 0.5 N is higher than that of the tightening region. The sanitary shorts according to any one of the above items <1> to <19>, more preferably 50% or more.
<21>
The tightening region is composed of a first tightening region that covers the crack, a pair of second tightening regions that respectively cover the pair of grooving grooves, and a pair of third tightening regions that cover the side of the buttocks,
The sanitary according to any one of <1> to <20>, wherein the tightening region further includes a fourth tightening region including an upper tightening region extending outward in the lateral direction from an upper end region of the first tightening region. shorts.
<22>
Has a waist opening,
In the waist opening, an annular waist stretchable region along the opening end is formed at the opening end,
The sanitary shorts according to <21>, wherein the fourth tightening region is arranged continuously with the waist stretchable region 51 so as to extend along a direction in which the waist stretchable region extends.
<23>
A region surrounded by the first to fourth tightening regions and including the buttocks rear protrusion is defined,
The region is a low tightening region having a relatively lower tightening force than the first to fourth tightening regions;
The low tightening region is preferably 0.1 N / 20 mm or more on condition that the stress σ at 10% elongation is lower than the value of the stress σ of the first to fourth tightening regions. 15N / 20mm or more is more preferable, 0.2N / 20mm or more is more preferable, 1.5N / 20mm or less is preferable, and 1.0N / 20mm or less is more preferable. , 0.7 N / 20 mm or less is more preferable,
The value of stress σ at the time of 10% elongation in the low tightening region is preferably 0.1 N / 20 mm or more and 1.5 N / 20 mm or less, and preferably 0.15 N / 20 mm or more and 1.0 N / 20 mm or less. The sanitary shorts according to <21> or <22>, more preferably 0.2 N / 20 mm or more and 0.7 N / 20 mm or less.
<24>
Has a waist opening,
In the waist opening, an annular waist stretchable region along the opening end is formed at the opening end,
The front body has a front body body that is an area excluding the waist opening and the leg opening,
The front body portion preferably has an elongation under a stress of 0.5 N of 20% or more, more preferably 30% or more, still more preferably 50% or more, and 150%. Is preferably 100% or less, more preferably 80% or less,
The elongation value is preferably 20% or more and 150% or less under a stress of 0.5 N, more preferably 30% or more and 100% or less, and further preferably 50% or more and 80% or less. The sanitary short according to any one of <1> to <23>.

<25>
Has a waist opening,
In the waist opening, an annular waist stretchable region along the opening end is formed at the opening end,
The front body has a front body body that is an area excluding the waist opening and the leg opening,
The front body portion is preferably 0.1 N / 20 mm or more, provided that the stress σ at 10% elongation is lower than the value of the stress σ of the tightening region, and is 0.15 N / 20 mm. More preferably, it is more preferably 0.2 N / 20 mm or more, more preferably 1.5 N / 20 mm or less, still more preferably 1.0 N / 20 mm or less, and 7N / 20mm or less is more preferable,
The value of stress σ at the time of 10% elongation in the front body part is preferably 0.1 N / 20 mm or more and 1.5 N / 20 mm or less, and is 0.15 N / 20 mm or more and 1.0 N / 20 mm or less. The sanitary shorts according to any one of the above <1> to <24>, more preferably 0.2 N / 20 mm or more and 0.7 N / 20 mm or less.
<26>
Has a waist opening,
In the waist opening, an annular waist stretchable region along the opening end is formed at the opening end,
The front body has a front body body that is an area excluding the waist opening and the leg opening,
The back body has a back body body that is an area excluding the waist opening and the leg opening,
The back body has a low tightening region that has a relatively lower tightening force than the tightening region,
The ratio of (longitudinal stretch amount of the front body portion) / (longitudinal stretch amount of the low tightening region in the back body portion) is 1.3 / 2.0 or more and 1.5 / 1.7 or less The sanitary short according to any one of <1> to <25>.
<27>
The sanitary shorts according to any one of <1> to <26>;
Sanitary shorts and absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable or hardly-permeable back sheet, and an absorbent article comprising a liquid-retaining absorbent disposed between both sheets. Combination with.
<28>
The top sheet and the back sheet have a peripheral joint part in which at least a part of the part extending from the peripheral part of the absorbent body is joined to each other at the peripheral part of the absorbent article,
The sanitary shorts according to <27>, wherein a non-joining portion extending in the width direction is formed at a front end of the peripheral joint portion formed at a front end portion and / or a rear end portion in the longitudinal direction of the absorbent article. And a combination of absorbent articles.

DESCRIPTION OF SYMBOLS 1 Sanitary shorts 2 Front body 2a Front body body part 3 Rear body part 3a Rear body part 4 Crotch part 4a Central region 4a 'Side edge 4b of central region 4a Side region 5 Waist opening 51 Waist elastic region 6 Leg opening 61 Leg stretchable region 7 Girth part 8a, 8b, 8c Joint 10 Tightening region 11 First tightening region (explosion tightening region)
12 Second tightening region (Long groove tightening region)
13 Third tightening area (side tightening area)
14 Fourth tightening area (Upper tightening area)
15 Low tightening area 20 Shape-retaining piece P Back impact point

Claims (9)

It has a front body, a back body, and a crotch part, and includes a longitudinal direction that is a direction extending between the front body and the back body through the crotch part, and a lateral direction perpendicular thereto. Sanitary shorts used by attaching an absorbent article to the crotch part,
The back body has a tightening region having a relatively high tightening force compared to other regions in the back body, and the tightening region has a crack, a ridge groove, and a buttocks at a position below the rear end of the buttocks. A shape that covers the side part continuously,
An annular leg stretchable region along the opening end is formed at the opening end of the leg opening,
Sanitary shorts in which at least a part of the leg stretchable region is continuous with at least a part of the tightening region in the ridge.   The said back body is comprised from the knitted fabric, this knitted fabric consists of two or more area | regions from which a knitting structure differs, The said fastening area | region is comprised from one of these two or more area | regions. Sanitary shorts. An annular waist stretchable region along the opening end is formed at the opening end of the waist opening,
In the tightening region, a part covering the crack extends toward the waist stretchable region, whereby the part is continuous with at least a part of the waist stretchable region at the upper part of the buttock. The sanitary shorts listed.   The sanitary shorts according to any one of claims 1 to 3, wherein the tightening region has lower elasticity than the region other than the tightening region in the back body. The back body has a low tightening region having a relatively lower tightening force than the tightening region;
The sanitary shorts according to any one of claims 1 to 4, wherein the low tightening region is disposed at a position including a rear rear protrusion, and the tightening region is disposed around the low tightening region. The tightening region extending in a longitudinal direction along the crack;
A pair of ridge groove tightening regions extending laterally outward from the lower end region of the crack tightening region and extending laterally along the ridge groove;
The sanitary shorts according to any one of claims 1 to 5, further comprising a pair of side tightening regions extending from the end region of the ridge groove tightening region in the vertical direction. A pair of plate-shaped shape retaining pieces are arranged on the crotch portion with a vertical center line that bisects the crotch portion left and right,
The shape-retaining piece is formed by superimposing a plurality of nonwoven fabrics, and each nonwoven fabric is joined and integrated in a discontinuous joining pattern, and at least one of the nonwoven fabrics is constituted by a heat-fusible conjugate fiber. The sanitary shorts according to any one of claims 1 to 6, wherein the sanitary shorts are made of a nonwoven fabric to which fiber intersections are joined. Sanitary shorts according to any one of claims 1 to 7,
Sanitary shorts and absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable or hardly-permeable back sheet, and an absorbent article comprising a liquid-retaining absorbent disposed between both sheets. Combination with. The top sheet and the back sheet have a peripheral joint part in which at least a part of the part extending from the peripheral part of the absorbent body is joined to each other at the peripheral part of the absorbent article,
The sanitary shorts according to claim 8, wherein a non-joining portion extending in the width direction is formed at a front end of the peripheral joint portion formed at a front end portion and / or a rear end portion in the longitudinal direction of the absorbent article. Combination with absorbent articles.

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