Pants-type sanitary napkin

Abstract

An underpants-type sanitary napkin (1) provided with a belly-side waist part (20) and a back-side waist part (30), the belly-side waist part (20) and the back-side waist part (30) each having an inner sheet, an outer sheet, and a waist elastic member, the coefficient of friction of the skin-side surface of the inner sheet being smaller than the coefficient of friction of the non-skin-side surface of the outer sheet, and the coefficient of friction of the non-skin-side surface of the outer sheet being smaller than the coefficient of friction of the non-skin-side surface of the outer sheet. A waist grip portion (GW) is provided above the waist elastic members (23, 33), an inclined stretchable region (A35) is provided at the lower end of the back-side waist portion (30), a leg grip portion (GL) is provided outside the inclined stretchable region (A35), and the length of the waist grip portion (GW) is longer than the interval between the waist elastic members (23, 33). The length in the left-right direction of the leg-surrounding grip section (GL) is greater than the maximum width of the inclined expansion / contraction region (A35).

Description

Technical Field

[0001] The present invention relates to a short-pant type sanitary napkin. Background Art

[0002] In Patent Document 1, there is disclosed a panty-type absorbent article having: an absorbent main body portion; and an outer sheet that overlaps the outside of the absorbent main body portion and includes a front region that covers the waist and crotch portions on the ventral side of the wearer and a rear region that covers the waist and crotch portions on the dorsal side of the wearer. Further, a handle is formed by folding back and welding an end portion of the outer sheet that faces the waist opening. Thus, even for infants, the elderly, etc. with weak finger strength, it is easy to lift the panty-type absorbent article upward toward the waist when wearing.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2013-22346 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] Compared with infants and the elderly who routinely wear panty-type absorbent articles (diapers), the wearers of short-pant type sanitary napkins wear them only during the menstrual period. Therefore, there are many cases where the wearers are in low spirits due to discomfort and anxiety about leakage. In addition, women during the menstrual period are in a state of hypersensitivity due to changes in hormone balance, etc. Therefore, the wearers of short-pant type sanitary napkins are sensitive to wearing comfort. For example, they are likely to feel discomfort with the waist portion made of a raw material different from that of the underwear. However, in Patent Document 1, there is no particular distinction between the outer sheet located at the waist of the wearer and the auxiliary sheet that comes into contact with the skin of the wearer inside the outer sheet, and wearing comfort is not taken into consideration. Further, if the absorbent main body portion is covered by an integral outer sheet that is continuous from the ventral side of the wearer through the crotch portion to the dorsal side as in the panty-type absorbent article of Patent Document 1, the air permeability is poor, resulting in a decrease in wearing comfort.

[0008] In addition, many wearers of short-pant type sanitary napkins are concerned not only about the waist position but also about whether the buttocks are reliably covered. The wearers are particularly likely to be anxious about back leakage of menstrual blood during sleep, and sometimes repeatedly adjust the position of the dorsal waist portion covering the buttocks. However, in the panty-type absorbent article of Patent Document 1, although the ease of lifting the panty-type absorbent article is good, there is still a problem in that it is difficult to adjust the position of the dorsal waist portion covering the buttocks.

[0009] The present invention has been completed in view of the above-described conventional problems, and an object thereof is to provide a short-type sanitary napkin that has good wearing comfort, can reduce the uneasiness about back leakage, and is easy to adjust the position of the waist and the position of the dorsal waist portion covering the buttocks.

[0010] Means for solving the problems

[0011] The main technical means for achieving the above object is a short-type sanitary napkin having an up-down direction, a left-right direction, and a front-back direction that are orthogonal to each other. The short-type sanitary napkin has an absorbent body, a ventral waist portion, and a dorsal waist portion that is a split member with respect to the ventral waist portion. The ventral waist portion and the dorsal waist portion each have an inner sheet, an outer sheet, and a plurality of waist elastic members that stretch in the left-right direction. The coefficient of friction of the skin side of the inner sheet is smaller than the coefficient of friction of the non-skin side of the outer sheet. A waist gripping portion is provided at a position above the waist elastic member in the ventral waist portion and the dorsal waist portion. An inclined stretch region is provided at the lower end portion of the dorsal waist portion. The inclined stretch region has a portion that slopes downward as it goes from the left and right side portions of the dorsal waist portion toward the central portion and a portion that extends in the left-right direction at the central portion. A leg girth gripping portion is provided at the left and right side portions of the lower end portion of the dorsal waist portion. In the unfolded and elongated state, the leg girth gripping portion is located at a position outside the inclined stretch region on an imaginary line extending in the left-right direction from the center point. The center point is the center point on the center line extending in the up-down direction that bisects the dorsal waist portion in the left-right direction and bisects the inclined stretch region in the up-down direction. The length of the waist gripping portion in the up-down direction is longer than the interval in the up-down direction between the uppermost waist elastic member and the waist elastic member adjacent to the uppermost waist elastic member in the up-down direction. The length of the leg girth gripping portion in the left-right direction is longer than the maximum width of the inclined stretch region.

[0012] Regarding other features of the present invention, they will be clarified by the description in this specification and the drawings.

[0013] Effects of the invention

[0014] According to the present invention, it is possible to provide a short-type sanitary napkin that has good wearing comfort, can reduce the uneasiness about back leakage, and is easy to adjust the position of the waist and the position of the dorsal waist portion covering the buttocks. Description of the drawings

[0015] Figure 1 It is a front view of observing the short-type sanitary napkin 1 from the ventral side.

[0016] Figure 2 is a rear view of the short-pant type sanitary napkin 1 observed from the dorsal side.

[0017] Figure 3 is a top view of the short-pant type sanitary napkin 1 in the unfolded and elongated state observed from the skin side.

[0018] Figure 4 of Figure 4 A is Figure 3 a schematic cross-sectional view at the first center line CL1 of Figure 4 B is Figure 3 a schematic cross-sectional view at the second center line CL2 of

[0019] Figure 5 is a view showing a part of the ventral waist portion 20 in the elongated state.

[0020] Figure 6 is a view showing a part of the dorsal waist portion 30 in the elongated state.

[0021] Figure 7 is a view showing the dorsal waist portion 30 in the elongated state.

[0022] Figure 8 is a view showing the adhesive region 61 around the inclined elastic member 35.

[0023] Figure 9 is a view showing the adhesive region 62 between the absorbent body 10 and the dorsal waist portion 30.

[0024] Figure 10 is a view for explaining the menstrual blood dropping test and the saline dropping test. Detailed implementation mode

[0025] According to the description in this specification and the drawings, at least the following matters are clarified.

[0026] (Technical solution 1)

[0027] A short-pant type sanitary napkin having vertical, horizontal and front-back directions orthogonal to each other, the short-pant type sanitary napkin having an absorbent body, a ventral waist portion and a dorsal waist portion formed as a separate member relative to the ventral waist portion, characterized in that each of the ventral waist portion and the dorsal waist portion has an inner sheet, an outer sheet and a plurality of waist elastic members that stretch in the horizontal direction, the coefficient of friction of the skin side of the inner sheet is smaller than the coefficient of friction of the non-skin side of the outer sheet, a waist gripping portion is provided at a position above the waist elastic members in the ventral waist portion and the dorsal waist portion, an inclined stretch region is provided at the lower end portion of the dorsal waist portion, the inclined stretch region having a portion that slopes downward as it goes from the side portions in the horizontal direction of the dorsal waist portion toward the central portion and a portion that extends in the horizontal direction at the central portion, a leg-girth gripping portion is provided at the side portions in the horizontal direction of the lower end portion of the dorsal waist portion, and in the unfolded and stretched state, the leg-girth gripping portion is located at a position outside the inclined stretch region on an imaginary line extending in the horizontal direction from a center point, the center point being the center point on the center line extending in the vertical direction that bisects the dorsal waist portion in the horizontal direction and bisects the inclined stretch region in the vertical direction, the length of the waist gripping portion in the vertical direction is longer than the interval in the vertical direction between the uppermost waist elastic member and the waist elastic member adjacent to the uppermost waist elastic member in the vertical direction, and the length of the leg-girth gripping portion in the horizontal direction is longer than the maximum width of the inclined stretch region.

[0028] Compared with the case of having an integral outer member continuous from the ventral waist portion to the dorsal waist portion, the short-pant type sanitary napkin according to Technical Solution 1 has good air permeability. In addition, since the ventral waist portion and the dorsal waist portion are separated, when lifting the sanitary napkin during wearing, the lifting force is likely to concentrate on the joint portion between each waist portion and the absorbent body, and the absorbent body is likely to closely adhere to the crotch portion of the wearer. Also, during wearing, compared with the integral outer member, the absorbent body is less affected by the body movements of the waist, and thus it is easy to maintain the adhered state. Moreover, the coefficient of friction of the inner sheet in contact with the skin of the wearer is small and the slidability is good, so the stiffness of the waist portion is reduced. Therefore, the wearing comfort of the sanitary napkin is improved.

[0029] In addition, the lower portion of the dorsal waist portion closely adheres to the wearer by means of the inclined stretch region, and can reliably cover the buttocks, so the uneasiness about back leakage can be reduced. In addition, since the waist gripping portion and the leg-girth gripping portion have appropriate lengths, it is easy for the wearer to adjust the positions of the waist and the dorsal waist portion by holding these portions.

[0030] (Technical Solution 2)

[0031] The short-pant type sanitary napkin according to Technical Solution 1 is characterized in that, in the unfolded and elongated state, the length of the leg grip portion in the left-right direction is longer than the length of the waist grip portion in the up-down direction.

[0032] For the short-pant type sanitary napkin according to Technical Solution 2, when the wearer bends the body or the like, the contact between the waist grip portion and the skin can be reduced, and the discomfort of wearing comfort can be alleviated. On the other hand, by making the length of the leg grip portion in the left-right direction longer, the buttocks of the wearer can be widely covered in the left-right direction, and the uneasiness about back leakage can be alleviated.

[0033] (Technical Solution 3)

[0034] The short-pant type sanitary napkin according to Technical Solution 2 is characterized in that a welded portion formed by welding the inner sheet and the outer sheet is provided at the lower end portion of the ventral waist portion, and the welded portion is not provided at the lower end portion of the dorsal waist portion.

[0035] For the short-pant type sanitary napkin according to Technical Solution 3, the rigidity of the lower end portion of the ventral waist portion is increased by the welded portion. Therefore, it is not easy for the lower end portion of the ventral waist portion to curl due to the movement of the legs during wearing, etc., and the discomfort during wearing is not likely to occur. On the other hand, for the lower end portion of the dorsal waist portion having a leg grip portion that is longer in the left-right direction, the range of the portion in contact with the wearer is wider. Therefore, by not providing the welded portion, the contact with the wearer can be made soft, and the wearing comfort is improved.

[0036] (Technical Solution 4)

[0037] The short-pant type sanitary napkin according to any one of Technical Solutions 1 to 3 is characterized in that a welded portion formed by welding the inner sheet and the outer sheet is provided at the waist grip portion.

[0038] For the short-pant type sanitary napkin according to Technical Solution 4, the rigidity of the waist grip portion is increased by the welded portion, and it is not easy to turn over or the like. Therefore, the waist grip portion is easily recognized by the wearer and is easily grasped.

[0039] (Technical Solution 5)

[0040] The short-pant type sanitary napkin according to any one of Technical Solutions 1 to 4 is characterized in that the ventral waist portion and the dorsal waist portion are joined in a ring shape by a pair of side joining portions, and the leg grip portion is located at a position lower than the central position in the up-down direction between the lower end of the side joining portion and the lower end of the short-pant type sanitary napkin.

[0041] The short-pant type sanitary napkin according to Technical Solution 5 has a leg-grip portion located at a lower position, making it easily recognizable by the wearer and facilitating its use during position adjustment. In addition, it can widely cover the wearer's buttocks in the left-right direction downwards.

[0042] (Technical Solution 6)

[0043] The short-pant type sanitary napkin according to any one of Technical Solutions 1 to 5 is characterized in that the ventral waist portion and the dorsal waist portion are joined into a ring shape by a pair of side joining portions, and the outer ends of the leg-grip portion in the left-right direction are located at positions outside the side joining portions in the left-right direction.

[0044] The short-pant type sanitary napkin according to Technical Solution 6 has a leg-grip portion located at a more outer position in the left-right direction, making it easily recognizable by the wearer and facilitating its use during position adjustment. In addition, it can widely cover the wearer's buttocks in the left-right direction.

[0045] (Technical Solution 7)

[0046] The short-pant type sanitary napkin according to any one of Technical Solutions 1 to 6 is characterized in that the ventral waist portion and the dorsal waist portion are joined into a ring shape by a pair of side joining portions, and in the unfolded and elongated state, the length of the leg-grip portion in the left-right direction is shorter than the length in the left-right direction from the side end of the absorbent body in the left-right direction to the inner end of the leg-grip portion in the left-right direction.

[0047] The short-pant type sanitary napkin according to Technical Solution 7 does not have an unnecessarily long leg-grip portion. Even if the leg-grip portion enters the inner side with the inclined stretch area as the folding starting point, it will not cover the absorption surface of the absorbent body and is easy to pull out.

[0048] (Technical Solution 8)

[0049] The short-pant type sanitary napkin according to any one of Technical Solutions 1 to 7 is characterized in that the dorsal waist portion has a protruding portion that extends to a position lower than the inclined stretch area on the center line that bisects the dorsal waist portion in the left-right direction. In the unfolded and elongated state, the length of the protruding portion in the up-down direction is shorter than the length of the leg-grip portion in the left-right direction.

[0050] The short-pant type sanitary napkin according to Technical Solution 8 does not have an unnecessarily long protruding portion that cannot be held by the wearer, thus being able to prevent the protruding portion from curling or rolling up and causing discomfort during sleep.

[0051] (Technical Solution 9)

[0052] The short-pant type sanitary napkin according to any one of Technical Solutions 1 to 8, characterized in that the stiffness of the outer ends in the left-right direction of the leg-grip part is lower than that of the inner ends in the left-right direction of the leg-grip part.

[0053] For the short-pant type sanitary napkin according to Technical Solution 9, the outer end in contact with the wearer of the leg-grip part is softer, which can reduce the discomfort during wearing and improve the wearing comfort. On the other hand, the stiffness of the inner end, which is the root of the leg-grip part, is increased, so that the leg-grip part is likely to protrude in the left-right direction, and is thus easily recognized by the wearer and easily held.

[0054] (Technical Solution 10)

[0055] The short-pant type sanitary napkin according to any one of Technical Solutions 1 to 9, characterized in that the bonding area where the absorbent body and the dorsal waist part are joined has portions that overlap in the front-back direction with the left and right ends of the absorbent body and the inclined telescopic area.

[0056] For the short-pant type sanitary napkin according to Technical Solution 10, the shrinkage in the left-right direction of the inclined telescopic area can be suppressed, so that the situation where the lower part of the dorsal waist part is likely to curl can be suppressed. Therefore, it is easy to maintain the flatness of the leg-grip part, and it is thus easily recognized by the wearer and easily held.

[0057] (Technical Solution 11)

[0058] The short-pant type sanitary napkin according to any one of Technical Solutions 1 to 10, characterized in that the ventral waist part and the dorsal waist part are joined in a ring shape by a pair of side joints, and the number of pleats of the leg-grip part is smaller than the number of pleats of the area between the inclined telescopic area and the absorbent body, which is below the side joints.

[0059] For the short-pant type sanitary napkin according to Technical Solution 11, the planar area of the leg-grip part in appearance increases, making the leg-grip part easily recognized by the wearer and easily held.

[0060] (Technical Solution 12)

[0061] The panty-type sanitary napkin according to any one of Technical Solutions 1 to 11, wherein the absorbent body has an absorbent core, and in the unfolded and elongated state, the panty-type sanitary napkin has a length direction, a left-right direction, and a thickness direction that are perpendicular to each other. In the case of performing a menstrual blood dripping test of dripping artificial menstrual blood onto the core central portion that is the central portion in the length direction and the left-right direction of the absorbent core, the thickness of the core central portion of the panty-type sanitary napkin after the menstrual blood dripping test is smaller than the thickness of the core central portion of the panty-type sanitary napkin before the menstrual blood dripping test.

[0062] According to the panty-type sanitary napkin of Technical Solution 12, at the core central portion where the excretory opening of the sanitary napkin abuts against the wearer, the thickness does not expand after absorbing menstrual blood. Therefore, it is possible to suppress the formation of unevenness on the side of the skin and easily maintain the state where the sanitary napkin is closely attached to the excretory opening of the wearer. As a result, the wearing comfort is good, and in addition, it is possible to suppress the flow of menstrual blood along the gap generated between the wearer and the sanitary napkin.

[0063] (Technical Solution 13)

[0064] The panty-type sanitary napkin according to any one of Technical Solutions 1 to 12, wherein the absorbent body has an absorbent core, and in the unfolded and elongated state, the panty-type sanitary napkin has a length direction, a left-right direction, and a thickness direction that are perpendicular to each other. In the case of performing a saline dripping test of dripping physiological saline onto the dorsal central portion that is the central portion in the length direction and the left-right direction in the dorsal region when the absorbent core is divided into three equal parts in the length direction, the thickness of the dorsal central portion of the panty-type sanitary napkin after the saline dripping test is smaller than the thickness of the dorsal central portion of the panty-type sanitary napkin before the saline dripping test.

[0065] According to the panty-type sanitary napkin of Technical Solution 13, compared with the ventral part of the wearer, the dorsal part is more likely to sweat, especially when lying on the back, but since the thickness of the dorsal central portion does not expand after absorbing sweat (physiological saline), it is easy to maintain the state where the sanitary napkin is closely attached to the groove portion of the wearer's buttocks (the state of entering the groove portion of the wearer's buttocks). As a result, the wearing comfort is good, and it is possible to suppress the back leakage of menstrual blood along the groove of the buttocks.

[0066] ===Embodiment===

[0067] <<Basic Structure of Panty-Type Sanitary Napkin 1>>

[0068] Figure 1 It is a front view of observing the panty-type sanitary napkin 1 from the ventral side. Figure 2It is a rear view of the short-pant type sanitary napkin 1 observed from the dorsal side. Figure 3 It is a top view of the short-pant type sanitary napkin 1 in the unfolded and elongated state observed from the skin side. Figure 4 of Figure 4 A is Figure 3 a schematic cross-sectional view at the first center line CL1 of Figure 4 B is Figure 3 a schematic cross-sectional view at the second center line CL2 of. In the following description, the short-pant type sanitary napkin is also simply referred to as "sanitary napkin". In addition, the first center line CL1 is a line extending in the left-right direction at the center point bisecting the product in the length direction, and the second center line CL2 is a line extending in the length direction at the center point bisecting the product in the left-right direction.

[0069] The unfolded state of the short-pant type sanitary napkin 1 refers to a state in which a pair of side joining parts 2 provided on both side parts of the sanitary napkin 1 are separated, and the sanitary napkin 1 is opened and flattened.

[0070] The elongated state of the short-pant type sanitary napkin 1 refers to a state in which the sanitary napkin 1 is elongated to such an extent that the wrinkles of the sanitary napkin 1 cannot be visually recognized. Specifically, the elongated state refers to a state in which the dimensions of the respective components constituting the sanitary napkin 1 become the same as or close to the dimensions of the component alone.

[0071] The short-pant type sanitary napkin 1 has an up-down direction, a left-right direction, and a front-back direction that are orthogonal to each other, and has a waist opening BH and a pair of leg openings LH. The upper side in the up-down direction corresponds to the side of the waist opening BH, and the lower side corresponds to the crotch side. The front side in the front-back direction corresponds to the ventral side of the wearer, and the rear side corresponds to the dorsal side of the wearer. In addition, as Figure 4 A and Figure 4 B show, the direction in which the components constituting the sanitary napkin 1 are stacked is set as the thickness direction. The side in contact with the skin of the wearer in the thickness direction is set as the skin side, and the opposite side is set as the non-skin side.

[0072] In addition, the short-pant type sanitary napkin 1 has an absorbent body 10, a ventral waist part 20 covering the ventral part of the wearer, and a dorsal waist part 30 covering the dorsal part of the wearer. As Figure 3 shown, the short-pant type sanitary napkin 1 has a length direction, a left-right direction, and a thickness direction that are orthogonal to each other in the unfolded state. The length direction in the unfolded state corresponds to the up-down direction in the short-pant state. In the following description, the ventral waist part 20 and the dorsal waist part 30 are also collectively referred to as the waist parts 20, 30.

[0073] In the sanitary napkin 1 in the unfolded state, the ventral waist portion 20 and the dorsal waist portion 30 are positioned in a state of being arranged at intervals in the longitudinal direction, and an absorbent body 10 is provided along the longitudinal direction between the ventral waist portion 20 and the dorsal waist portion 30. Each end portion in the longitudinal direction of the absorbent body 10 is respectively joined and fixed to the skin side of the closest part of the ventral waist portion 20 or the dorsal waist portion 30. From this state, the absorbent body 10 is folded in half in the longitudinal direction, and the left and right side portions of the ventral waist portion 20 and the dorsal waist portion 30 facing each other are connected by a pair of side joining portions 2, thereby forming a panty-type sanitary napkin 1. That is, the ventral waist portion 20 and the dorsal waist portion 30 are joined in a ring shape by a pair of side joining portions 2. In addition, as a joining method using the side joining portion 2, hot melt bonding, ultrasonic bonding, a joining method using an adhesive, etc. can be exemplified.

[0074] The absorbent body 10 has: an absorbent core 11 that absorbs and holds excreted liquids such as menstrual blood; a liquid-permeable surface sheet 12 (such as non-woven fabric, perforated film, etc.) disposed at a position closer to the skin side than the absorbent core 11; an impermeable backsheet 13 (such as a resin film, etc.) disposed at a position closer to the non-skin side than the absorbent core 11; and side sheets 14 (such as hydrophobic non-woven fabric, etc.). In addition, the outer peripheral surface of the absorbent core 11 may also be covered with a liquid-permeable core wrap sheet 15 such as cotton paper or non-woven fabric.

[0075] As the absorbent core 11, an absorbent core containing water-retaining fibers can be exemplified. The water-retaining fibers are not particularly limited as long as they have the property of absorbing and holding moisture, and for example, cellulose-based fibers (such as pulp fibers, cotton, non-wood fibers such as hemp, and regenerated fibers such as rayon) can be exemplified.

[0076] On both side portions in the left-right direction of the absorbent body 10, a pair of leak-proof wall portions 3 are provided along the longitudinal direction of the absorbent body 10. The leak-proof wall portions 3 are formed by the side sheets 14. Specifically, the portion of the side sheet 14 that covers the non-skin side surface of the backsheet 13 and extends outward in the left and right directions is bent at multiple locations and is provided on both side portions in the left-right direction on the skin side surface of the surface sheet 12, thereby forming the leak-proof wall portions 3. A leak-proof wall elastic member 16 (such as a rubber cord) is installed in a state of extending along the longitudinal direction on the leak-proof wall portions 3. Based on the stretchability of the leak-proof wall elastic member 16, the leak-proof wall portions 3 stand up toward the skin side of the wearer.

[0077] The ventral waist portion 20 and the dorsal waist portion 30 each include a skin side piece 21, 31 (inner piece), a non-skin side piece (outer piece) 22, 32 laminated at a position on the non-skin side with respect to the skin side pieces 21, 31, and a plurality of waist elastic members 23, 33 (such as elastic cords) that expand and contract in the left-right direction. Between the skin side pieces 21, 31 and the non-skin side pieces 22, 32, the plurality of waist elastic members 23, 33 are arranged in the up-down direction and are installed in a state of being elongated in the left-right direction. The ventral waist portion 20 and the dorsal waist portion 30 are attached to the wearer's waist using the elasticity of the waist elastic members 23, 33.

[0078] In addition, covering pieces 24, 34 may be provided so as to cover the upper end portion of the absorbent main body 10 from the skin side. By using the covering pieces 24, 34, it is possible to prevent the upper end edge of the absorbent main body 10 from digging into the wearer's skin and to prevent the opening of the absorbent main body 10.

[0079] In addition, as Figure 3 shown, the planar shapes of the ventral waist portion 20 and the dorsal waist portion 30 in the unfolded and elongated state are different. The length of the ventral waist portion 20 in the up-down direction is approximately the same as the length of the side joint portion 2, and the ventral waist portion 20 has a rectangular shape that is longer in the left-right direction. The dorsal waist portion 30 has a waist side portion 30A having a rectangular shape that overlaps with the ventral waist portion 20 and a lower crotch side portion 30B having a substantially trapezoidal shape that extends to a position lower than the waist side portion 30A (lower than the side joint portion 2).

[0080] The basic structure of the sanitary napkin 1 has been described above, but the structure of the sanitary napkin 1 described above is an example and is not limited thereto.

[0081] For example, a liquid-permeable intermediate piece may be provided between the surface piece 12 and the core package piece 15. In addition, the ventral waist portion 20 may have a portion that extends downward to the crotch side. In addition, linear waist elastic members 23, 33 may be provided at the upper end portions (waist portions) of the waist portions 20, 30 to make them fit reliably, and a stretchable sheet may be disposed at a position lower than the linear waist elastic members 23, 33 instead of the linear waist elastic members 23, 33. By disposing a stretchable sheet between the skin side pieces 21, 31 and the non-skin side pieces 22, 32 and intermittently joining the laminated sheets, the waist portions 20, 30 exhibit elasticity and softly fit the wearer's waist in a planar form.

[0082] ===Waist gripping portion GW and leg circumference gripping portion GL===

[0083] Figure 5 FIG. is a partial view showing the ventral waist portion 20 in the elongated state. Figure 6 FIG. is a partial view showing the dorsal waist portion 30 in the elongated state. Figure 7This is a diagram showing the dorsal waist part 30 in the extended state.

[0084] Compared with infants and the elderly who usually wear underwear-type absorbent articles (diapers), the wearers of short-pant-type sanitary napkins only wear them during the menstrual period, so they are prone to discomfort. In addition, women during the menstrual period are sensitive to wearing comfort due to unpleasantness, anxiety about leakage, changes in hormone balance, etc. Thus, in the short-pant-type sanitary napkin 1 of the present embodiment, the ventral waist part 20 and the dorsal waist part 30 are configured as separate components. Therefore, in the short-pant-type sanitary napkin 1 in the deployed and extended state ( Figure 3 ), the ventral waist part 20 and the dorsal waist part 30 are separated at intervals in the length direction.

[0085] Therefore, compared with the case where a single outer package member continuous from the ventral waist part to the dorsal waist part (for example, an outer package member having a substantially hourglass shape in plan view) is provided on the non-skin side of the absorbent main body 10, which is different from the present embodiment, the air permeability of the absorbent main body 10 is good and the wearing comfort is good. In addition, the main use of the short-pant-type sanitary napkin 1 is to absorb menstrual blood. Compared with the urine absorbed by diapers, the viscosity of menstrual blood is higher and the excretion amount excreted to the sanitary napkin 1 is less (the excretion amount of menstrual blood is less than that of urine). Therefore, in the sanitary napkin 1, the absorbent core 11 is not easily sag due to its own weight after absorbing the excreted liquid, and even if the absorbent main body 10 is not supported by a continuous outer package member from the ventral waist part to the dorsal waist part, the state where the absorbent main body 10 is in close contact with the wearer can be maintained. As a result, it is possible to suppress the leakage of menstrual blood, which has a higher viscosity than urine and is likely to spread on the surface sheet, flowing along the gap generated between the sanitary napkin and the wearer.

[0086] In addition, since the ventral waist part 20 and the dorsal waist part 30 are separated, when lifting the sanitary napkin 1 during wearing, the lifting force is likely to be concentrated on the joint part between each waist part (20, 30) and the absorbent main body 10, and the absorbent main body 10 is easily in close contact with the crotch part and the groove part of the buttocks of the wearer. In addition, during wearing, compared with an integrated outer package member, the absorbent main body 10 is less affected by the movement of the body at the waist, so it is easy to maintain the fitting state. Thus, the discomfort during wearing is reduced and the wearing comfort is good.

[0087] More preferably, there is no outer package member connecting the ventral waist part 20 and the dorsal waist part 30 as separate components in the crotch part, and the non-skin side surface of the absorbent main body 10 is exposed in the crotch part. Thereby, the air permeability of the absorbent main body 10 is further improved. In addition, in the crotch part of the sanitary napkin 1, there are no components on the outer sides in the left-right direction of the absorbent main body 10, so the discomfort around the leg circumference is reduced, the wearing comfort is good, and the wearer can easily move the legs.

[0088] In addition, wearers of the short-pant type sanitary napkin 1 are likely to feel discomfort with the waist part made of a raw material different from that of the underwear.

[0089] Therefore, in the short-pant type sanitary napkin 1 of the present embodiment, the coefficient of friction (dynamic coefficient of friction) of the skin side surfaces of the skin side sheets 21 and 31 (inner sheets) constituting the ventral waist part 20 and the dorsal waist part 30 is made smaller than the coefficient of friction (dynamic coefficient of friction) of the non-skin side surfaces of the non-skin side sheets 22 and 32 (outer sheets).

[0090] As a result, the sliding property of the sheets in contact with the wearer's waist part is good, and even when the legs and body move due to walking, turning over, etc., the feeling of stiffness can be reduced, and the wearing comfort of the sanitary napkin 1 is improved. On the other hand, by increasing the coefficient of friction of the non-skin side sheets 22 and 32, the positional deviation of the sanitary napkin 1 caused by friction with clothes and friction with the bed during sleep can be suppressed. For example, as the skin side sheets 21 and 31 with a smaller coefficient of friction, SMS (spunbond-meltblown-spunbond) non-woven fabric, spunbond non-woven fabric, etc. added with a lubricant can be exemplified. As the non-skin side sheets 22 and 32 with a larger coefficient of friction, SMS non-woven fabric, spunbond non-woven fabric not added with a lubricant, and non-woven fabric subjected to a flocking treatment can be exemplified.

[0091] In addition, diaper wearers often wear pants over the diaper. If the coefficient of friction of the skin side surface of the skin side sheet is small and it is easy to slide, the diaper is likely to shift in position between the wearer and the pants, resulting in a decrease in wearing comfort and leakage of excreted fluid. In contrast, wearers of the short-pant type sanitary napkin 1 sometimes wear the short-pant type sanitary napkin 1 alone under a T-shirt or wear the short-pant type sanitary napkin under a dress at home, during sleep, etc. Therefore, the friction between the wearer and the clothes is not likely to occur, and even if the coefficient of friction of the skin side surfaces of the skin side sheets 21 and 31 is small, the positional deviation of the sanitary napkin 1 is not likely to occur. In addition, assuming that the positional deviation occurs, the wearer of the sanitary napkin 1 is different from infants, the elderly, etc., and can easily adjust the position of the sanitary napkin 1 by himself / herself.

[0092] In addition, the inner sheet in the present invention refers to a sheet that at least partially contacts the skin of the wearer, and can be a sheet that sandwiches the waist elastic members 23 and 33 together with the non-skin side sheets 22 and 32 like the skin side sheets 21 and 31 of the present embodiment, or a sheet that does not sandwich the waist elastic members 23 and 33. In addition, the outer sheet in the present invention refers to a sheet that at least partially contacts the outside.

[0093] In addition, in the sanitary napkin 1 of the present embodiment, there are covering sheets 24 and 34 that cover the upper end portion of the absorbent main body 10 from the skin side. When the coefficient of friction on the skin side of the covering sheets 24 and 34 is smaller than the coefficient of friction on the non-skin side of the non-skin side sheets 22 and 32, the covering sheets 24 and 34 also function as inner sheets. When such a plurality of sheets come into contact with the skin of the wearer, it is sufficient that the coefficient of friction of at least one sheet is small. Preferably, it is better to make the coefficient of friction of a larger number of sheets small or to make the coefficient of friction of the sheet with a larger contact area with the wearer small. Thereby, the slidability is improved in a larger range of the waist portions 20 and 30, and the wearing comfort becomes good.

[0094] The comparison of the coefficients of friction of the skin side of the inner sheet and the non-skin side of the outer sheet can be carried out by a known method. For example, it can be compared using the KES-FB4-A-AUTO (automated surface tester) manufactured by Kato Tech Co., Ltd. or an equivalent device.

[0095] First, use toluene or the like to dissolve the adhesive, separate the inner sheet and the outer sheet to be measured from the panty-type sanitary napkin 1 and dry them. Then, cut out a range of 100 mm × 100 mm of each sheet as a sample and place it on a smooth metal plane test bench for measurement. Move each sample horizontally in the direction corresponding to the left-right direction of the sanitary napkin 1 at a constant speed of 0.1 cm / sec for 0 to 2 cm. Using a friction head (measurement head) with an outer dimension of 5 mm × 5 mm, under the condition of an initial load of 50 gf, obtain the average coefficient of friction (MIU) within the moving range. Conduct the same measurement 5 times for each sample, and calculate its average value as the average coefficient of friction in the left-right direction. Similarly, conduct the measurement in the direction corresponding to the up-down direction of the sanitary napkin 1 (move the sample in the up-down direction as well), and calculate the average value of 5 times as the average coefficient of friction in the up-down direction. Then, calculate the average value of the average coefficient of friction in the left-right direction and the average coefficient of friction in the up-down direction for each sample, and use this average value as the coefficient of friction (dynamic coefficient of friction) of each sample for comparison.

[0096] In addition, as Figure 1 , Figure 2 shown, a waist grip portion Gw is provided at a position above the waist elastic members 23 and 33 in the ventral waist portion 20 and the dorsal waist portion 30 of the panty-type sanitary napkin 1. The waist grip portion Gw refers to a portion above the uppermost waist elastic members 23 and 33 in each of the waist portions 20 and 30. In the present embodiment, as Figure 4 shown in B, the waist grip portion Gw is composed of the skin side sheets 21 and 31 and the non-skin side sheets 22 and 32.

[0097] In addition, as Figure 5 ,Figure 6 As shown, in the unfolded and extended state of the sanitary napkin 1, the length L1 in the vertical direction of the waist grip portion GW is longer than the vertical interval L2 between the uppermost waist elastic members 23a and 33a in the waist portions 20 and 30 and the waist elastic members 23b and 33b (the second waist elastic member from the top) adjacent to the waist elastic members 23a and 33a in the vertical direction.

[0098] Therefore, compared with the case where the length of the waist grip portion GW in the vertical direction is shorter than the interval L2 between the waist elastic members 23 and 33, it is easier for the wearer to hold the waist grip portion GW to adjust the position of the sanitary napkin 1. Compared with the wearer of a diaper, the wearer of the sanitary napkin 1 is more sensitive to wearing comfort, leakage, appearance, etc., and makes more fine adjustments to the sanitary napkin 1. Assuming that the waist elastic member is arranged at the upper end of the waist portion, the wearer will put a finger into the inside of the waist portion to make adjustments, and the waist portion is likely to move to a large extent, making it difficult to make fine adjustments. In contrast, the wearer can easily make fine adjustments to the waist portions 20 and 30 (waist) by holding the waist grip portion GW.

[0099] In addition, in the waist grip portion GW, the skin side pieces 21 and 31 and the non-skin side pieces 22 and 32 are contracted in the horizontal direction by the waist elastic members 23 and 33 to form wrinkles, thus forming a frill shape. Therefore, the wearer has a soft impression of the waist position of the sanitary napkin 1 and is likely to consider it a product with good wearing comfort.

[0100] In addition, based on the uppermost waist elastic members 23 and 33 in the ventral waist portion 20 and the dorsal waist portion 30, the lengths are compared (the interval L2 is determined). In the present embodiment, in the ventral and dorsal sides, the vertical positions (interval L2) of the first and second waist elastic members 23 and 33 from the top are the same. When the vertical positions of the first waist elastic members 23 and 33 from the top are the same in the ventral and dorsal sides but the positions (interval L2) of the adjacent second waist elastic members 23 and 33 are different, the length of the waist grip portion GW only needs to be longer than the interval L2 of at least the shorter one.

[0101] In addition, as Figure 3 shown, in the dorsal waist portion 30 of the sanitary napkin 1 of the present embodiment, a crotch side portion 30B extending to a position lower than the side joint portion 2 is provided. In the crotch side portion 30B, the lateral width becomes wider from the lower side to the upper side, so that the crotch side portion 30B can cover the wearer's buttocks. Therefore, the uneasiness of the wearer about whether side leakage will occur at the rear side can be reduced.

[0102] Moreover, an inclined elastic member 35 is provided at the lower end of the dorsal waist portion 30 (the portion from the lower end of the side joint portion 2 to the crotch side portion 30B). The area where the inclined elastic member 35 is provided, that is, the area surrounded by the uppermost inclined elastic member 35a and the lowermost inclined elastic member 35c, is called the inclined expansion / contraction area A35. As Figure 7 shown, the inclined expansion / contraction area A35 is arranged substantially along the lower outer edge of the dorsal waist portion 30, and has a portion A35b that slopes downward as it moves from the side portions in the left-right direction of the dorsal waist portion 30 toward the central portion, and a portion A35a that extends in the left-right direction at the central portion of the dorsal waist portion 30.

[0103] Similar to the waist elastic members 23 and 33, the inclined elastic member 35 is also installed in an extended state between the skin-side sheet 31 and the non-skin-side sheet 32. By utilizing the elasticity of the inclined elastic member 35, the crotch side portion 30B of the dorsal waist portion 30 easily adheres to the wearer's buttocks and is not easily curled up from the buttocks. In addition, due to the swelling on both sides of the buttocks, the crotch side portion 30B that adheres to the buttocks is stretched left and right, which can prevent the absorbent main body 10 from being overly pressed into the groove of the buttocks. Therefore, the uneasiness about back leakage can be further reduced, and the decline in wearing comfort can also be suppressed. In the present embodiment, as the inclined elastic member 35, three rubber bands are exemplified, but the number of rubber bands is not particularly limited. In addition, the inclined elastic member 35 can also be a sheet-like elastic member (stretchable non-woven fabric, stretchable film, etc.). In this case, the portion where the stretchable non-woven fabric is arranged to exhibit elasticity becomes the inclined expansion / contraction area A35.

[0104] In addition, leg girth gripping portions GL are provided on the side portions in the left-right direction at the lower end of the dorsal waist portion 30 (the portion below the side joint portion 2). As Figure 7 shown, in the unfolded and extended state of the sanitary napkin 1, the leg girth gripping portions GL are located at positions outside the inclined expansion / contraction area A35 on an imaginary line LV extending in the left-right direction from the center point p. The center point p is the intersection point p of the inclined elastic member 35b located at the center of the inclined expansion / contraction area A35 and the second center line CL2 that bisects the dorsal waist portion 30 in the left-right direction and extends in the up-down direction. In addition, as Figure 6 shown, the length W1 of the leg girth gripping portions GL in the left-right direction is longer than the maximum width W2 of the inclined expansion / contraction area A35 (here, the length in the up-down direction on the second center line CL2). In addition, the width of the inclined expansion / contraction area A35 refers to the length in the direction orthogonal to the direction in which the inclined expansion / contraction area A35 extends.

[0105] Therefore, compared with the case where the length in the left-right direction of the leg circumference grip portion GL is shorter than the maximum width W2 of the inclined telescopic region A35, it is easier for the wearer to hold the leg circumference grip portion GL, and it is easier to adjust the position of the dorsal waist portion 30 (the lower crotch side portion 30B). In particular, wearers of sanitary napkins are prone to anxiety about whether the buttocks are reliably covered and whether there will be back leakage of menstrual blood during sleep, and sometimes repeatedly adjust the position of the dorsal waist portion 30 that covers the buttocks. In this case, it is also easy to adjust the position of the lower crotch side portion 30B by using the leg circumference grip portion GL. In addition, since it is easy to hold the leg circumference grip portion GL, the wearer does not need to put a finger inside the lower crotch side portion 30B to hold a part of the inclined telescopic region A35 to move the position of the lower crotch side portion 30B to a large extent, and it is also easy to finely adjust the position of the lower crotch side portion 30B.

[0106] In addition, since the length W1 in the left-right direction of the leg circumference grip portion GL becomes longer, the coverage area of the buttocks increases, so the uneasiness of the wearer about back leakage can be reduced.

[0107] In the above description, in order to define the position and length W1 of the leg circumference grip portion GL, the case where the leg circumference grip portion GL is located on the imaginary line LV is shown. In this specification, as Figure 6 shown, the region having the regions GL1 and GL2 is set as the portion held by the wearer and is included in the leg circumference grip portion GL, where the region GL1 is a region obtained by separating a predetermined width (for example, about 5 mm to 1 cm) downward from the leg circumference grip portion GL on the imaginary line LV, and the region GL2 is a region obtained by separating a predetermined width (for example, about 5 mm to 1 cm) upward from the leg circumference grip portion GL on the imaginary line LV and is a region outside the inclined telescopic region A35 in the left-right direction. However, in the following description, regarding the position and length of the leg circumference grip portion GL, the leg circumference grip portion GL on the imaginary line LV is used as a reference.

[0108] As described above, according to the short-pant type sanitary napkin 1 of the present embodiment, the wearing comfort is good, the uneasiness about back leakage can be reduced, and it is easy to adjust the position of the waist (the upper end portions of the waist portions 20 and 30) and the position of the dorsal waist portion 30 that covers the buttocks.

[0109] In addition, in the short-pant type sanitary napkin 1, preferably, in the unfolded and elongated state, the length W1 in the left-right direction of the leg circumference grip portion GL is longer than the length L1 in the up-down direction of the waist grip portion GW (L1 < W1).

[0110] As a result, it becomes easier for a wearer who is prone to anxiety about back leakage to hold the leg circumference grip portion GL, and it becomes easier to make position adjustments. In addition, compared with the waist, the leg circumference has a higher frequency of movement, and the sanitary napkin 1 is likely to shift, so the frequency of making position adjustments to the leg circumference is higher. Therefore, by making it easier to hold the leg circumference grip portion GL, the leg circumference grip portion GL is utilized more effectively. In addition, the dorsal waist portion 30 can cover the buttocks more widely in the left-right direction, thereby reducing the wearer's anxiety about back leakage. On the other hand, by not making the waist grip portion GW longer than necessary, it is possible to reduce the discomfort of the waist grip portion GW pressing against the wearer when the wearer bends the body or sits down, for example.

[0111] Moreover, in the above case, as Figure 5 shown, a welding portion 51 formed by welding the skin-side pieces 21, 31 and the non-skin-side pieces 22, 32 is provided at the lower end portion of the ventral waist portion 20. As Figure 6 shown, preferably, no welding portion 51 is provided at the lower end portion of the dorsal waist portion 30.

[0112] In this case, the welding portion 51 is used to increase the stiffness of the lower end portion of the ventral waist portion 20, so it is easy to maintain the shape of the lower end portion of the ventral waist portion 20. Therefore, it is possible to suppress the folding and curling of the lower end portion of the ventral waist portion 20 caused by the movement of the legs during wearing and during the wearing period, and it is not easy to cause discomfort during wearing. In addition, the ventral waist portion 20 can reliably cover the ventral part of the wearer. On the other hand, the lower end portion of the dorsal waist portion 30 is provided with the leg circumference grip portion GL, and the length in the left-right direction is relatively long. Therefore, if a welding portion 51 is provided to increase the stiffness, there is a concern that it may cause discomfort during wearing. Therefore, no welding portion 51 is provided at the lower end portion of the dorsal waist portion 30, thereby improving the wearing comfort.

[0113] In addition, preferably, a welding portion 52 formed by welding the skin-side pieces 21, 31 and the non-skin-side pieces 22, 32 is provided on the waist grip portion GW. Thus, the stiffness of the waist grip portion GW is increased by the welding portion 52. Therefore, it is easier for the wearer to hold the waist grip portion GW, and thus it is easier to make position adjustments to the waist. In addition, it is possible to suppress the folding and curling of the waist grip portion GW, and it is easy to maintain the frill shape, and it is possible to give the user an impression that the sanitary napkin 1 is a soft sanitary napkin 1.

[0114] The welding parts 51 and 52 can be formed by known welding methods such as ultrasonic welding and thermal welding. Additionally, in the present embodiment, a plurality of dot-shaped welding parts 51 and 52 are arranged at intervals in the left-right direction, and the shape, number, and arrangement of the welding parts 51 and 52 are not particularly limited. However, in the waist grip part GW, by arranging a plurality of welding parts 52 at intervals in the left-right direction, the part of the sheet located between the welding parts 52 is regularly contracted by the contraction of the waist elastic members 23 and 33. Thus, it is easy to beautifully form a frill shape. In addition, the above-mentioned respective parts may not have the welding parts 51 and 52, and the lower end part of the back waist part 30 may have a welding part.

[0115] In addition, it is preferable that the waist grip part GW has a part that overlaps with the side joint part 2 of the sanitary napkin 1 in the up-down direction. Preferably, as Figure 1 shown, it is preferable that the side joint part 2 extends upward to the upper end of the waist grip part GW. Thereby, the stiffness of the waist grip part GW is increased by the side joint part 2, making it easier for the wearer to hold the waist grip part GW.

[0116] In addition, in the sanitary napkin 1 of the present embodiment, covering sheets 24 and 34 are provided on the skin side. The covering sheets 24 and 34 are joined to the skin sides of the waist parts 20 and 30 and the upper end part of the absorbent body 10 using an adhesive or the like. Preferably, the length in the up-down direction of the non-joined part (the area where the adhesive is not applied) of the covering sheets 24 and 34 that is not joined to the waist parts 20 and 30 and the absorbent body 10 is shorter than the length in the up-down direction of the waist grip part GW. Since the non-joined part of the covering sheets 24 and 34 is not used for the position adjustment of the sanitary napkin 1, by making the non-joined part of the covering sheets 24 and 34 shorter than the waist grip part GW, the discomfort during wearing can be reduced.

[0117] In addition, in the present embodiment, as Figure 4 shown in B, the upper end parts of the skin side sheets 21 and 31 and the non-skin side sheets 22 and 32 are not folded back, and the upper ends (cut edges) of the skin side sheets 21 and 31 and the non-skin side sheets 22 and 32 coincide with the upper ends of the waist parts 20 and 30. In this case, the structure is simplified, and cost reduction is achieved by material reduction. In addition, in this case, it is preferable that the bonding area for joining the skin side sheets 21 and 31 and the non-skin side sheets 22 and 32 is located below the upper ends of the waist parts 20 and 30. Thereby, the stiffness of the upper end parts (the areas where the adhesive is not applied) of the waist parts 20 and 30 is decreased, making the contact with the wearer softer.

[0118] It is not limited to the above, and it is also possible to fold back the end of at least one of the skin side pieces 21, 31 and the non-skin side pieces 22, 32 downward. As a result, the number of layers stacked in the waist grip portion GW increases, and the stiffness is improved, so that the wearer can easily hold the waist grip portion GW. In addition, due to manufacturing errors, the positions of the upper ends of the skin side pieces 21, 31 and the non-skin side pieces 22, 32 will not be scattered, and the positions of the upper ends of the waist portions 20, 30 are aligned, so the appearance of the sanitary napkin 1 is improved.

[0119] In addition, as Figure 2 shown, preferably, in the natural state of the short-pant type sanitary napkin 1, the leg grip portion GL (imaginary line LV) is located at a position lower than the central position CL3 in the vertical direction between the lower end 2L of the side joint portion 2 and the lower end 1L of the short-pant type sanitary napkin.

[0120] In the natural state of the sanitary napkin 1, since the leg grip portion GL is located at a lower position, the leg grip portion GL is conspicuous and is easily recognized by the wearer. Therefore, the leg grip portion GL is easily used when adjusting the position. In addition, since the leg grip portion GL, which is long in the left-right direction, is located at a lower position, the dorsal waist portion 30 can be used to widely cover the buttocks in the lower range, and the wearer's uneasiness about back leakage can be reduced.

[0121] In addition, as Figure 2 shown, preferably, in the natural state of the short-pant type sanitary napkin 1, the outer ends GLa in the left-right direction of the leg grip portion GL are located outside the side joint portion 2 in the left-right direction.

[0122] In the natural state of the sanitary napkin 1, since the leg grip portion GL protrudes from the side joint portion 2, the leg grip portion GL is conspicuous and is easily recognized by the wearer. Therefore, the leg grip portion GL is easily used when adjusting the position. In addition, the dorsal waist portion 30 can be used to cover the buttocks more widely in the left-right direction, and the wearer's uneasiness about back leakage can be reduced.

[0123] In addition, as Figure 6 shown, preferably, in the unfolded and elongated state of the short-pant type sanitary napkin 1, the length W1 in the left-right direction of the leg grip portion GL is shorter than the length W3 in the left-right direction from the side end 10a in the left-right direction of the absorbent body 10 to the inner end GLb in the left-right direction of the leg grip portion GL.

[0124] As a result, the leg grip portion GL will not be unnecessarily long, and low cost can be achieved based on material reduction. In addition, even if the leg grip portion GL is folded inward with the inclined elastic member 35 as the folding starting point, it will not cover the skin side of the absorbent body 10, and it is easy to pull out the leg grip portion GL that has entered.

[0125] In addition, as Figure 7 shown, the dorsal waist portion 30 has a protruding portion 30E that protrudes to a position below the inclined telescopic region A35 on the center line CL2 that bisects the dorsal waist portion 30 in the left - right direction. Thereby, peeling of the inclined elastic member 35 caused by curling of the sheet or the like can be suppressed. However, preferably, in the unfolded and elongated state of the short - type sanitary napkin 1, the length L3 of the protruding portion 30E in the up - down direction is shorter than the length W1 of the leg - girth gripping portion GL in the left - right direction.

[0126] Different from the leg - girth gripping portion GL and the waist - gripping portion GW, the protruding portion 30E that overlaps with the absorbent body 10 is not grasped by the wearer and is not used for position adjustment. Therefore, by not making the protruding portion 30E grow unnecessarily, material reduction is achieved. In addition, if the protruding portion 30E is long, there is a concern that the protruding portion 30E is likely to curl and overlap with the leg - girth elastic member 35 during wearing, resulting in wrinkles and curls, and becoming hard between the bed and the absorbent body 10 during the sleeping position. Therefore, by suppressing the length of the protruding portion 30E, the discomfort caused by curling and crimping of the protruding portion 30E can be reduced.

[0127] Figure 8 It is a view showing the bonding region 61 around the inclined elastic member 35.

[0128] Preferably, the stiffness of the outer end portion GLo of the leg - girth gripping portion GL in the left - right direction is lower than the stiffness of the inner end portion GLi in the left - right direction. In addition, for the comparison of the stiffness of the leg - girth gripping portion GL, as Figure 6 shown, it is better to compare in the regions GL1 and GL2 where the leg - girth gripping portion GL has a width in the up - down direction along the imaginary line LV.

[0129] Due to the lower stiffness of the outer end portion GLo of the leg - girth gripping portion GL, the tactile sensation with respect to the wearer's skin becomes soft, and the wearing comfort is improved. On the other hand, since the stiffness of the inner end portion GLi of the leg - girth gripping portion GL is high, the wearer can easily grasp the leg - girth gripping portion GL. In addition, since the stiffness of the inner end portion GLi, which is the root of the leg - girth gripping portion GL, is high, it is easy to maintain the state where the leg - girth gripping portion GL protrudes outward in the left - right direction, and the leg - girth gripping portion GL is easily recognized by the wearer.

[0130] In order to change the stiffness of the leg - girth gripping portion GL, for example, it is preferable to adjust the coating amount (weight per unit area) of the adhesive that joins the skin - side sheet 31 and the non - skin - side sheet 32 constituting the dorsal waist portion 30. As Figure 8As shown, in addition to setting the bonding area 61A (the area where the adhesive is applied) having a rectangular shape that matches the outer shape of the dorsal waist part 30, it is preferable to also overlap and set the bonding area 61B indicated by thick lines at the position where the inclined elastic member 35 is disposed. Thus, at the inner end GLi adjacent to the inclined elastic member 35 in the leg circumference gripping part GL, the adhesive is overlapped and applied, so that the stiffness can be improved. On the other hand, at the outer end GLo of the leg circumference gripping part GL away from the inclined elastic member 35, the adhesive is not overlapped and applied, so that the stiffness can be reduced. In addition, by overlapping and setting the bonding areas 61A and 61B at the position where the inclined elastic member 35 is disposed, the position of the inclined elastic member 35 can be reliably fixed.

[0131] Figure 9 FIG. is a view showing the bonding area 62 where the absorbent main body 10 is joined to the dorsal waist part 30. The bonding area 62 for joining the absorbent main body 10 to the dorsal waist part 30 has a plurality of bonding areas 62A and a plurality of bonding areas 62B. The plurality of bonding areas 62A are in a rectangular shape that is long in the left-right direction and arranged in the up-down direction, and the plurality of bonding areas 62B are in a rectangular shape that is long in the up-down direction and arranged in the left-right direction. In addition, the bonding areas 62A and 62B are areas having a rectangular shape circumscribed by the actual part where the adhesive is applied. The adhesive may be applied over the entire area of the bonding areas 62A and 62B, or may be applied in a known pattern such as an omega pattern or a spiral pattern within the bonding areas 62A and 62B.

[0132] In addition, preferably, the bonding area 62 for joining the absorbent main body 10 to the dorsal waist part 30 has a portion where the left and right end portions 10s in the left-right direction of the absorbent main body 10 overlap with the inclined expansion and contraction area A35 in the front-rear direction (thickness direction). The left and right end portions 10s in the left-right direction of the absorbent main body 10 refer to the areas at both ends when the absorbent main body 10 is divided into five equal parts in the left-right direction with its maximum width. In Figure 9 FIG., the bonding area 62B having a rectangular shape that is long in the up-down direction overlaps with the left and right end portions 10s in the left-right direction of the absorbent main body 10 and the inclined expansion and contraction area A35.

[0133] Assume that if the inclined expansion and contraction area A35 is not fixed to the left and right end portions 10s in the left-right direction of the absorbent main body 10, the contraction in the left-right direction of the inclined expansion and contraction area A35 is enhanced, and the lower part (the crotch side part 35B) of the dorsal waist part 30 is likely to curl. Then, the leg circumference gripping part GL is not prominent and is not easily recognized, and is not easily gripped. Therefore, as described above, by fixing the inclined expansion and contraction area A35 to the left and right end portions 10s in the left-right direction of the absorbent main body 10, the contraction of the leg circumference gripping part GL can be suppressed, so that the leg circumference gripping part GL is easily recognized and easily gripped.

[0134] In addition, as Figure 2 shown, preferably, the number of pleats formed in the leg circumference gripping portion GL is smaller than the number of pleats in the region between the inclined stretchable region A35 and the absorbent body 10, which is located below the side joint portion 2. By having a smaller number of pleats in the leg circumference gripping portion GL, the planar area of the leg circumference gripping portion GL in appearance increases, making it easier to be recognized by the wearer, easier to utilize during position adjustment, and easier for the wearer to hold.

[0135] Specifically, in the short-pant type sanitary napkin 1 in the natural state, as Figure 2 shown, a region r1 having a predetermined width in the vertical direction, including a part or the whole in the left-right direction (a part in Figure 2 ) of the leg circumference gripping portion GL on the imaginary line LV, is determined. In addition, a region r2 having the same shape and area as the region r1 is determined in the region between the inclined stretchable region A35 and the absorbent body 10, which is located below the side joint portion 2. Then, it is preferable to compare the number of pleats formed in the leg circumference gripping portion GL (region r1) with the number of pleats in the region between the inclined stretchable region A35 and the absorbent body 10, which is located below the side joint portion 2 (region r2), based on the result obtained by visually judging the magnitude relationship of the number of pleats formed in the two regions r1 and r2 or actually counting and comparing the number of pleats in the regions r1 and r2.

[0136] <<Regarding the fitting property of the short-pant type sanitary napkin 1>>

[0137] Figure 10 It is a diagram illustrating a menstrual blood dripping test and a saline dripping test.

[0138] In the short-pant type sanitary napkin 1 in the unfolded and elongated state ( Figure 10 ), in the case of performing a menstrual blood dripping test in which artificial menstrual blood is dripped onto the central portion R1 (core central portion) in the length direction and the left-right direction of the absorbent core 11, it is desirable that the thickness of the central portion R1 of the short-pant type sanitary napkin 1 after the menstrual blood dripping test is smaller than the thickness of the central portion R1 of the short-pant type sanitary napkin 1 before the menstrual blood dripping test.

[0139] In the menstrual blood dripping test, imagining the actual use scenario of the sanitary napkin 1, artificial menstrual blood is dripped onto the central portion R1 in the length direction and the left-right direction of the absorbent core 11 that abuts against the wearer's excretion opening (vaginal orifice). As a result of the applicant's research, the amount of the dripped artificial menstrual blood is also set to the average amount discharged to the sanitary napkin 1, which is 10 ml.

[0140] In contrast to the present embodiment, for a sanitary napkin in which the thickness of the central portion R1 becomes thicker after the menstrual blood dripping test, unevenness is likely to form on the skin side after absorbing menstrual blood. It is considered that this is because, compared with the case where the space between the water-retaining fibers becomes smaller due to the absorption of menstrual blood and the thickness becomes thinner, in the case where the space between the water-retaining fibers expands or the superabsorbent polymer swells due to the absorption of menstrual blood and the thickness becomes thicker, it is easier for the change mode (expansion mode) of the thickness to deviate due to various reasons (distribution of the constituent materials of the absorbent core 11, degree of diffusion of menstrual blood, etc.). In addition, it is considered that the unevenness (thickness difference) also becomes larger due to the increase in thickness.

[0141] In contrast, in the sanitary napkin 1 of the present embodiment, the expansion of the central portion R1 after the menstrual blood dripping test is suppressed, and the thickness becomes thinner. Therefore, it is possible to avoid forming unevenness on the skin side of the excretion port abutting position and its peripheral portion of the sanitary napkin 1 even after absorbing menstrual blood. Thus, it is easy to maintain the state where the sanitary napkin 1 is closely attached to the excretion port of the wearer and its peripheral portion, and the wearing comfort is good. In addition, it is possible to suppress the leakage of menstrual blood flowing along the gap generated between the sanitary napkin and the wearer (back leakage).

[0142] Here, the method of the "menstrual blood dripping test" will be described.

[0143] (1) First, tear the side joint portion 2 of the panty-type sanitary napkin 1 to be measured, and fix the sanitary napkin 1 in an unfolded and elongated state with the skin side facing upward (refer to Figure 3 ).

[0144] (2) Next, determine the center position P1 (refer to Figure 10 ), which is the intersection of the line that bisects the absorbent core 11 in the length direction at its maximum length and the line that bisects the absorbent core 11 in the left-right direction at its maximum width. The region R1 of a circle with a diameter of 8 cm centered on this center position P1 is determined as the central portion R1 (core central portion) of the absorbent core 11 in the length direction and also in the left-right direction.

[0145] (3) Next, measure the overall thickness of the sanitary napkin 1 at five places within the central portion R1, and calculate the average value of the thicknesses at these five places. The average value is set as the thickness of the central portion R1 of the panty-type sanitary napkin 1 before the menstrual blood dripping test.

[0146] (4) Next, set a cylindrical jig 40 (outer diameter 8 cm, inner diameter 7 cm, thickness (outer radius - inner radius) 0.5 cm, weight 200 g) in the central portion R1. Drop 10 ml of artificial menstrual blood into the inside of the jig 40, and after the artificial menstrual blood penetrates into the absorbent main body, leave it for 1 hour with the jig 40 removed.

[0147] (5) After 1 hour from the start of dripping artificial menstrual blood, measure the overall thickness of the sanitary napkin 1 at five locations within the region (hollow portion) on the inner side of the jig 40 that was placed in the central portion R1, and calculate the average value of the thicknesses at these five locations. Set this average value as the thickness of the central portion R1 of the short-pant type sanitary napkin 1 after the menstrual blood dripping test. Then, compare it with the thickness before the test.

[0148] In addition, the thickness of the sanitary napkin 1 is measured, for example, using a spring-type thickness gauge (Peacock J-B) manufactured by Ozaki Seisakusho Co., Ltd. or a thickness gauge equivalent thereto (the pressure during measurement is determined according to the jig of the above-mentioned gauge). In the case where the sanitary napkin 1 has a compressed portion (embossing) locally compressed in the planar direction, measure the thickness of the non-compressed portion.

[0149] The artificial menstrual blood uses a substance prepared by adding 80 g of glycerin, 8 g of sodium carboxymethylcellulose, 10 g of sodium chloride, 4 g of sodium bicarbonate, 8 g of Red No. 102, 2 g of Red No. 2, and 2 g of Yellow No. 5 to 1 L of ion-exchanged water and stirring well.

[0150] [Table 1]

[0151] [[Menstrual Blood Dripping Test]]

[0152]

[0153] Actually produce samples of short-pant type sanitary napkins (Examples A to D, Comparative Example A), and conduct a menstrual blood dripping test. The results of the menstrual blood dripping test of the short-pant type sanitary napkin 1 (Examples A to D) of the present embodiment and Comparative Example A are shown in Table 1.

[0154] As shown in Table 1, the structures of the absorbent cores 11 of the respective samples are as described below. In Example A, the pulp fiber (basis weight 145 g / m 2 ) does not contain SAP (superabsorbent polymer), in Example B, the pulp fiber (basis weight 145 g / m 2 ) contains 1.3 g of SAP in total at a basis weight of 20.4 g / m 2 , in Example C, the pulp fiber (basis weight 145 g / m 2 ) contains 1.95 g of SAP in total at a basis weight of 30.6 g / m 2 , in Example D, the pulp fiber (basis weight 145 g / m 2 ) contains 2.6 g of SAP in total at a basis weight of 40.8 g / m 2 , and in Comparative Example A, the pulp fiber (basis weight 145 g / m 2 ) contains SAP at a basis weight of 133.4 g / m2 Contains 8.5 g of SAP by total weight.

[0155] In addition, the top sheet 11 uses a hydrophilic hot air nonwoven fabric (basis weight 25 g / m 2 ), the core wrap sheet 15 uses cotton paper (basis weight 15 g / m 2 ), the back sheet 13 uses a breathable resin film (basis weight 20 g / m 2 ), and the side sheets use a hydrophobic SMS nonwoven fabric (basis weight 15 g / m 2 ).

[0156] According to the results in Table 1, in Examples A to D, the thickness after the menstrual blood dripping test was less than the thickness before the test. In addition, it was found that there was the following tendency: as the basis weight per unit area of the SAP contained in the absorbent core 11 decreased, the ratio of the thickness reduction also increased (the value of (thickness after dripping) / (thickness before dripping) further decreased).

[0157] [Table 2]

[0158]

[0159] Table 2 shows the results of the reference test of the menstrual blood dripping test. As a reference test, a panty-type sanitary napkin having an absorbent core (pulp fiber, basis weight 145 g / m 2 ) that does not contain SAP was manufactured. The absorbent core of Reference Example A for the menstrual blood dripping test was flat-pressed during manufacturing (a process of uniformly compressing the entire surface of the absorbent core). The absorbent core of Reference Example B was directly obtained by demolding the pulp fiber laminated on the mold, and was not flat-pressed.

[0160] According to the results in Table 2, in Reference Example A where the absorbent core was flat-pressed, the thickness after the menstrual blood dripping test was greater than the thickness before the test. On the other hand, in Reference Example B where the absorbent core was not flat-pressed, the thickness after the menstrual blood dripping test was less than the thickness before the test. Therefore, it was found that the pressure applied in the thickness direction during the manufacturing of the absorbent core also affects the thickness of the absorbent core (sanitary napkin 1) after absorbing menstrual blood.

[0161] Based on the above results, by adjusting the amount of SAP contained in the absorbent core 11 and the intensity of the pressure applied during the manufacturing of the absorbent core 11, it is possible to manufacture the sanitary napkin 1 of the present embodiment that suppresses the swelling of the central portion R1 of the sanitary napkin 1 after absorbing menstrual blood.

[0162] Moreover, in the unfolded and stretched state of the sanitary napkin 1 ( Figure 10)Under the following circumstances, in the saline drop test in which saline is dropped onto the dorsal central part R2, which is the central part in the longitudinal direction and the left-right direction in the dorsal region 11C obtained by trisecting the absorbent core 11 in the longitudinal direction, it is desirable that the thickness of the dorsal central part R2 of the short-pant type sanitary napkin 1 after the saline drop test is smaller than the thickness of the dorsal central part R2 of the short-pant type sanitary napkin 1 before the saline drop test.

[0163] In the saline drop test, assuming a scenario where the wearer sweats on the dorsal part during sleep (in a supine sleeping position), saline (artificial sweat) is dropped onto the dorsal central part R2 of the absorbent core 11, which is the position where the dorsal part of the wearer abuts. According to the research results of the applicant, the amount of saline dropped is also set to the average amount of sweating during sleep (8 hours), which is 30 ml.

[0164] In the sanitary napkin 1, different from a diaper that requires a space for storing feces in the buttocks, it is desirable that the sanitary napkin 1 enters the groove of the wearer's buttocks, thereby being able to suppress the back leakage of menstrual blood along the groove of the buttocks. Therefore, as in the sanitary napkin 1 of the present embodiment, by preventing the thickness of the dorsal central part R2 of the sanitary napkin 1 from swelling after absorbing sweat (saline), it is easy to maintain the state where the sanitary napkin 1 is closely attached to the groove of the buttocks (the state of entering the groove of the buttocks). In addition, by thinning the thickness of the dorsal central part R2 of the sanitary napkin 1, it is possible to avoid forming unevenness on the skin side of the sanitary napkin 1, so it is also easy to maintain the state where the sanitary napkin 1 is closely attached to the dorsal part (buttocks) of the wearer, and the wearing comfort is good. In addition, it is possible to suppress the back leakage of menstrual blood along the groove of the buttocks. In particular, even when the buttocks are prone to sweating during sleep, back leakage can be suppressed.

[0165] Here, the method of the "saline drop test" will be described. The differences from the menstrual blood drop test will be mainly described.

[0166] (1) First, the short-pant type sanitary napkin 1 to be measured is set in an unfolded and elongated state and fixed with the skin side facing upward.

[0167] (2) Next, the dorsal region 11C is determined among the regions (11A to 11C) obtained by trisecting the absorbent core 11 in the longitudinal direction at its maximum length, and the dorsal center position P2 is determined. The dorsal center position P2 is the intersection of the line that bisects the dorsal region 11C in the longitudinal direction at its maximum width and the line that bisects the dorsal region 11C in the left-right direction at its maximum width (refer to Figure 10 ). The region R2 of a circle with a diameter of 8 cm centered on the dorsal center position P2 is determined as the dorsal central part R2, which is the central part in the longitudinal direction and the left-right direction in the dorsal region 11C.

[0168] (3) Next, measure the overall thickness of the sanitary napkin 1 at five locations within the dorsal central portion R2, and calculate the average value of the thicknesses at these five locations. Set this average value as the thickness of the dorsal central portion R2 of the panty-type sanitary napkin 1 before the saline drop test.

[0169] (4) Next, set up a cylindrical jig 40 (the same as in the menstrual blood drop test) in the dorsal central portion R2. Drop 30 ml of physiological saline inside the jig 40. After the physiological saline penetrates into the absorbent body, leave it for 1 hour with the jig 40 removed. Use physiological saline with a concentration of 0.9%.

[0170] (5) After leaving it for 1 hour since the saline was dropped, measure the overall thickness of the sanitary napkin 1 at five locations within the area (hollow portion) inside the dorsal central portion R2 where the jig 40 was previously placed, and calculate the average value of the thicknesses at these five locations. Set this average value as the thickness of the dorsal central portion R2 of the panty-type sanitary napkin 1 after the saline drop test. Then, compare it with the thickness before the test.

[0171] [Table 3]

[0172] [[Saline Drop Test]]

[0173]

[0174] Table 3 shows the results of the saline drop test for the panty-type sanitary napkin 1 (Examples A to D) and Comparative Example A of the present embodiment. For samples (Examples A to D, Comparative Example A) having the same structure as the samples of the panty-type sanitary napkin that underwent the above menstrual blood drop test, the saline drop test was conducted. According to the results in Table 3, in Examples A and B, the thickness after the saline drop test was less than the thickness before the test. On the other hand, for Examples C, D, and Comparative Example A where the unit area weight of the SAP was greater than that of Examples A and B, the thickness after the saline drop test was greater than the thickness before the test. Similarly to the menstrual blood drop test, it was found that there was a tendency that as the unit area weight of the SAP contained in the absorbent core 11 decreased, the ratio of the thickness reduction also increased (the value of (thickness after dropping) / (thickness before dropping) further decreased).

[0175] [Table 4]

[0176]

[0177] Table 4 shows the results of the reference tests of the brine dropping test. The reference tests (tests of dropping brine onto a sanitary napkin having an absorbent core not containing SAP) were also conducted in the same manner. As a result, as shown in Table 4, in Reference Example A where the absorbent core was flat-pressed, the thickness after the brine dropping test was greater than the thickness before the test, and in Reference Example B where the absorbent core was not flat-pressed, the thickness after the brine dropping test was less than the thickness before the test. Therefore, it was found that the pressure applied in the thickness direction during the manufacture of the absorbent core also affects the thickness of the absorbent core (sanitary napkin 1) after absorbing brine.

[0178] Based on the above results, by adjusting the amount of SAP contained in the absorbent core 11 and adjusting the intensity of the pressure applied during the manufacture of the absorbent core 11, it is possible to obtain the sanitary napkin 1 (Example A, Example B) of the present embodiment that suppresses swelling after absorbing sweat generated in the dorsal part (buttocks).

[0179] In addition, the absorbent core 11 may or may not have a superabsorbent polymer. In the case of not having a superabsorbent polymer, unevenness caused by swelling after the superabsorbent polymer absorbs liquid is less likely to occur. On the other hand, in the case of having a superabsorbent polymer, for example, when the superabsorbent polymer is mixed in an aggregate of water-retaining fibers, the water retention amount of the absorbent core 11 can be reliably ensured. In addition, since the superabsorbent polymer reliably retains the absorbed liquid, backwetting of excreted liquid (returning to the topsheet 12) can be suppressed.

[0180] However, the amount of water retention required for the sanitary napkin 1 is not as high as that of a diaper.

[0181] Therefore, preferably, for example, the total weight (g) of the core wrapper 15 and the absorbent core 11 (i.e., the water-retaining fibers and the superabsorbent polymer present in the core wrapper 15) is lighter than half of the weight (g) of the sanitary napkin 1.

[0182] Thereby, the weight of the components (core wrapper 15 and absorbent core 11) that affect the water retention amount of the absorbent main body 10 can be suppressed, the water retention amount of the absorbent main body 10 does not increase unnecessarily, and the total weight of the absorbent main body 10 can be reduced. Thus, sagging caused by the self-weight of the absorbent main body 10 can be suppressed. Therefore, it is easy to maintain the state where the sanitary napkin 1 is closely attached to the wearer.

[0183] ===Other Embodiments===

[0184] The embodiments of the present invention have been described above, but the above embodiments are for easy understanding of the present invention and are not used for limiting the interpretation of the present invention. In addition, the present invention can be changed and improved without departing from its gist, and equivalents thereof are of course included in the present invention.

[0185] Explanation of reference numerals

[0186] 1. Pantyliner; 2. Lateral joining part; 3. Leakage-preventing wall part; 10. Absorbent main body; 11. Absorbent core; 12. Surface sheet; 13. Backsheet; 14. Side sheet; 15. Core covering sheet; 16. Leakage-preventing wall elastic member; 20. Ventral waist part; 21. Skin-side sheet (inner sheet); 22. Non-skin-side sheet (outer sheet); 23. Waist elastic member; 24. Covering sheet (inner sheet); 30. Dorsal waist part; 31. Skin-side sheet (inner sheet); 32. Non-skin-side sheet (outer sheet); 33. Waist elastic member; 34. Covering sheet (inner sheet); 35. Tilt elastic member; A35. Tilt stretch area; 40. Fixture; 51. Welded part; 52. Welded part; 61. Adhesive area; 62. Adhesive area.

Claims

1. A short-pant type sanitary napkin having vertical, horizontal, and front-back directions orthogonal to each other, the short-pant type sanitary napkin having an absorbent body, a ventral waist portion, and a dorsal waist portion formed as a separate member relative to the ventral waist portion, characterized in that, the ventral waist portion and the dorsal waist portion each have an inner sheet, an outer sheet, and a plurality of waist elastic members that stretch in the horizontal direction, the coefficient of friction of the skin side of the inner sheet is smaller than the coefficient of friction of the non-skin side of the outer sheet, a waist grip portion is provided at a position above the waist elastic member in the ventral waist portion and the dorsal waist portion, an inclined stretch region is provided at the lower end portion of the dorsal waist portion, the inclined stretch region having a portion that slopes downward as it goes from the lateral portions in the horizontal direction of the dorsal waist portion toward the central portion and a portion that extends in the horizontal direction at the central portion, leg grip portions are provided at the lateral portions in the horizontal direction of the lower end portion of the dorsal waist portion, in the unfolded and extended state, the leg grip portions are located at positions outside the inclined stretch region on an imaginary line extending in the horizontal direction from a center point, the center point being the center point on the vertical center line that bisects the dorsal waist portion in the horizontal direction and bisects the inclined stretch region in the vertical direction, the length of the waist grip portion in the vertical direction is longer than the interval in the vertical direction between the uppermost waist elastic member and the waist elastic member adjacent to the uppermost waist elastic member in the vertical direction, the length of the leg grip portion in the horizontal direction is longer than the maximum width of the inclined stretch region.

2. The short-pant type sanitary napkin according to claim 1, characterized in that, in the unfolded and extended state, the length of the leg grip portion in the horizontal direction is longer than the length of the waist grip portion in the vertical direction.

3. The short-pant type sanitary napkin according to claim 2, characterized in that, a welded portion formed by welding the inner sheet and the outer sheet is provided at the lower end portion of the ventral waist portion, the welded portion is not provided at the lower end portion of the dorsal waist portion.

4. The short-pant type sanitary napkin according to any one of claims 1 to 3, characterized in that, a welded portion formed by welding the inner sheet and the outer sheet is provided at the waist grip portion.

5. The short-pant type sanitary napkin according to any one of claims 1 to 3, characterized in that, the ventral waist portion and the dorsal waist portion are joined into a ring shape by a pair of side joining portions, the leg grip portion is located at a position lower than the central position in the vertical direction between the lower end of the side joining portion and the lower end of the short-pant type sanitary napkin.

6. The short-pant type sanitary napkin according to any one of claims 1 to 3, characterized in that, the ventral waist portion and the dorsal waist portion are joined into a ring shape by a pair of side joining portions, the outer ends in the horizontal direction of the leg grip portion are located at positions outside the side joining portion in the horizontal direction.

7. The panty-type sanitary napkin according to any one of claims 1 to 3, wherein the ventral waist portion and the dorsal waist portion are joined in a ring shape by a pair of side joining portions, in the unfolded and extended state, the length in the left-right direction of the leg circumference gripping portion is shorter than the length in the left-right direction from the side end in the left-right direction of the absorbent body to the inner end in the left-right direction of the leg circumference gripping portion.

8. The panty-type sanitary napkin according to any one of claims 1 to 3, wherein the dorsal waist portion has a protruding portion that protrudes to a position lower than the inclined stretchable region on the center line that bisects the dorsal waist portion in the left-right direction, in the unfolded and extended state, the length in the up-down direction of the protruding portion is shorter than the length in the left-right direction of the leg circumference gripping portion.

9. The panty-type sanitary napkin according to any one of claims 1 to 3, wherein the stiffness of the outer end portion in the left-right direction of the leg circumference gripping portion is lower than the stiffness of the inner end portion in the left-right direction of the leg circumference gripping portion.

10. The panty-type sanitary napkin according to any one of claims 1 to 3, wherein the adhesive region that joins the absorbent body and the dorsal waist portion has portions that overlap in the front-back direction between the two end portions in the left-right direction of the absorbent body and the inclined stretchable region.

11. The panty-type sanitary napkin according to any one of claims 1 to 3, wherein the ventral waist portion and the dorsal waist portion are joined in a ring shape by a pair of side joining portions, the number of pleats of the leg circumference gripping portion is smaller than the number of pleats of the region between the inclined stretchable region and the absorbent body that is below the side joining portions.

12. The panty-type sanitary napkin according to any one of claims 1 to 3, wherein the absorbent body has an absorbent core, in the unfolded and extended state, the panty-type sanitary napkin has a length direction, a left-right direction, and a thickness direction that are orthogonal to each other, in the case of performing a menstrual blood dripping test in which artificial menstrual blood is dripped onto the core central portion that is the central portion in the left-right direction and is the length direction of the absorbent core, the thickness of the core central portion of the panty-type sanitary napkin after performing the menstrual blood dripping test is smaller than the thickness of the core central portion of the panty-type sanitary napkin before performing the menstrual blood dripping test.

13. The panty-type sanitary napkin according to any one of claims 1 to 3, wherein the absorbent body has an absorbent core, in the unfolded and extended state, the panty-type sanitary napkin has a length direction, a left-right direction, and a thickness direction that are orthogonal to each other, in the case of performing a saline dripping test in which saline is dripped onto the dorsal central portion that is the central portion in the left-right direction and is the length direction in the dorsal region when the absorbent core is trisected in the length direction, The thickness of the dorsal central part of the short-pant sanitary napkin after the saline drop test is less than the thickness of the dorsal central part of the short-pant sanitary napkin before the saline drop test.

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