CN214259671U - Absorbent article - Google Patents

Abstract

An absorbent article (1) is provided with an absorbent main body (4) having an absorber (40), and has a stomach portion (A), a back portion (B), and a crotch portion (C), wherein the absorber (40) has: a high grammage portion (43) located at the center in the width direction (Y) of the absorbent article (1); side low grammage parts (44) located on both sides of the high grammage part (43) in the width direction (Y); and a back-side low grammage part (45) located on the outer side in the longitudinal direction (X) of the end edge (43B) on the back-side part (B) side of the high grammage part (43), wherein a disposal tape (10) is provided on the non-skin-facing surface of the absorbent article (1), the disposal tape (10) in a three-folded state is disposed in the longitudinal direction (X) within the width range of the high grammage part (43) of the back-side part (B), and at least a part of the disposal tape (10) is located in the back-side low grammage part (45).

Description

Absorbent article

Technical Field

The utility model relates to an absorbent article with abandonment is with sticky tape.

Background

From the viewpoint of enabling disposal after use to be performed easily and hygienically, there is known a diaper having a disposal tape capable of maintaining a disposable diaper in a rolled state. For example, the present applicant has previously proposed an extension tape having an extendable extension portion provided in connection with a base portion as a disposal tape (patent document 1). The present applicant has proposed a disposable diaper having a display unit for displaying a time on a front side or a back side and an indicator member which is fixed so as to be capable of overlapping the display unit and is designed so that the time of wearing can be displayed by overlapping the indicator member with the display unit when worn, and has proposed that a waste tape can be used as the indicator member (patent document 2).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2000-93460

Patent document 2: japanese Kokai publication No. 2012 and 115359

Disclosure of Invention

The utility model relates to an absorbent article, it includes the positive dough sheet of liquid permeability, leak protection piece, and is located the absorber between above-mentioned positive dough sheet and above-mentioned leak protection piece, has the length direction that corresponds with the fore-and-aft direction of wearer and the width direction that is orthogonal with above-mentioned length direction, still has the ventral part of disposition in the ventral side of wearer when wearing, disposes in dorsal part of wearer, and is located the crotch portion between ventral part and the dorsal part. The absorbent body has: a high grammage portion located at a center portion in the width direction and extending in the longitudinal direction; side low grammage portions which are located on both sides of the high grammage portion in the width direction and are lower in grammage than the high grammage portion; and a back-side low grammage portion located outside an end edge of the back-side portion in the longitudinal direction of the high grammage portion and having a lower grammage than the high grammage portion. A disposal tape is provided on the non-skin-facing surface of the absorbent article. In the disposal tape, the fixing portion, the extending portion, and the fastening portion fixed to the non-skin-facing surface of the absorbent article are sequentially arranged along the longitudinal direction of the disposal tape, and are formed in a three-folded state in this order. In the waste tape in the three-folded state, the fixed portion and the extended portion are bonded to each other in a releasable manner, and the extended portion and the fixed portion are also bonded to each other in a releasable manner. The extension portion is capable of extending in a longitudinal direction of the waste tape in an unfolded state in which the three-fold state is released. The disposal tape in the three-folded state is disposed along the longitudinal direction of the absorbent article in a width range of the high grammage portion of the back side portion, and at least a part of the disposal tape is located in the back side low grammage portion.

Drawings

Fig. 1 is a perspective view showing an embodiment of an absorbent article of the present invention.

Fig. 2 is an expanded plan view schematically showing the skin-facing surface side of the absorbent article shown in fig. 1 in an expanded and stretched state.

Fig. 3 is an expanded back view schematically showing the non-skin-facing surface side of the absorbent article shown in fig. 1 in an expanded and stretched state.

Fig. 4 is a schematic cross-sectional view taken along line V-V of fig. 3.

Fig. 5 is a schematic sectional view taken along line VI-VI of fig. 2.

Fig. 6(a) is a perspective view showing a disposal form of the absorbent article shown in fig. 1, and fig. 6(b) is a perspective view showing a state in which the disposal tape of the absorbent article shown in fig. 1 is stretched in the process of forming the disposal form of the absorbent article shown in fig. 1.

Fig. 7 is a sectional view showing another embodiment of the absorbent article of the present invention, and corresponds to fig. 4.

Fig. 8 is a cross-sectional view showing a modification of the disposal tape of the present invention, and corresponds to fig. 5.

Detailed Description

The length of the disposal tape described in patent document 1 is increased by the extension of the extension portion, and therefore, the disposal tape can be widely arranged around the diaper wound in a roll, and the diaper can be easily maintained in a rolled state.

However, in general, the disposal tape having the extension portion is wound around the diaper while extending the extension portion by holding the disposal tape wound around the diaper with one hand, and when the disposal tape is wound around the diaper, the position of the extended disposal tape tends to be displaced from the center portion in the width direction of the diaper to the side portion.

The waste tape described in patent document 2 is formed in a Z-shape in which a thin tape-like tape is folded three times in its longitudinal direction, and is detachable when used, but does not have an extensible portion.

The utility model relates to a shorts type disposable diaper which can improve the operability of a waste adhesive tape in waste.

The present invention will be described based on preferred embodiments of the present invention with reference to the accompanying drawings. Fig. 1 shows a disposable diaper 1 according to an embodiment of the absorbent article of the present invention. A disposable diaper 1 (hereinafter, also simply referred to as "diaper 1") shown in this figure is, as shown in fig. 1, a pants-type disposable diaper having a waist opening 1W through which a waist portion of a wearer can pass and a pair of leg openings 1L, 1L through which lower limbs of the wearer can pass.

The diaper 1 has a longitudinal direction X corresponding to the front-back direction of the wearer, that is, a direction extending from the stomach-side portion a to the back-side portion B via the crotch portion C, and a width direction Y orthogonal to the longitudinal direction X in a state where the diaper 1 is laid out in a planar shape as shown in fig. 2.

As shown in fig. 2 and 6, the diaper 1 includes a liquid-permeable topsheet 2, a leakage-preventing sheet 3, and an absorber 40 located between the topsheet 2 and the leakage-preventing sheet 3. More specifically, the method comprises the following steps: an absorbent body 4 having a front sheet 2, a leakage preventive sheet 3, and an absorber 40; and an outer casing 5 disposed on the non-skin-facing surface side of the absorbent main body 4. The outer package 5 forms a non-skin-facing surface of the diaper 1, i.e., an outer surface of the diaper 1. The longitudinal direction X of the diaper 1 coincides with the longitudinal direction of the absorbent main body 4. As shown in fig. 2, the diaper 1 is formed to be bilaterally symmetric about a longitudinal center line CL extending in the longitudinal direction X and bisecting the diaper 1 in the width direction Y.

In the present specification, the "skin-facing surface" refers to a surface facing the skin side of the wearer when worn, i.e., a surface relatively close to the skin of the wearer, among the absorbent articles such as the diaper 1 or the constituent members thereof (e.g., the topsheet 2), and the "non-skin-facing surface" refers to a surface facing the opposite side (clothing side) to the skin side when worn, i.e., a surface relatively far from the skin of the wearer, among the absorbent articles such as the diaper 1 or the constituent members thereof. The term "worn" as used herein means a state in which a normal proper wearing position, that is, a proper wearing position of the diaper 1 is maintained.

The diaper 1 comprises: a ventral portion A disposed on the ventral side of the wearer in a worn state; a crotch part C arranged at the crotch part; and a back side portion B disposed on the back side of the wearer. The front side portion a, the back side portion B, and the crotch portion C are divided into three parts by trisecting the entire length of the diaper 10 in the longitudinal direction X.

In the diaper 1, both side edges of the outer package 5 in the longitudinal direction X of each of the front and back side portions a and B are joined to each other at the side seal 7 by a known joining means such as an adhesive, heat seal, or ultrasonic seal, and the waist opening 1W and the pair of leg openings 1L and 1L are formed by the joining.

Fig. 2 shows the diaper 1 in an unfolded and extended state. The "developed and stretched state" of the diaper 1 refers to a state in which the elastic members of the respective portions are stretched and expanded to a designed size (the same size as when the diaper is expanded to a flat shape while completely excluding the influence of the elastic members). As shown in fig. 2, in a pants-type absorbent article such as a pants-type absorbent article, a portion disposed at a side portion such as a side seal 7 is torn and then the absorbent article is expanded to a designed size.

The exterior body 5 includes an outer layer sheet 55, an inner layer sheet 56 disposed on the skin-facing surface side of the outer layer sheet 55, and a plurality of elastic members 53 and 54 disposed between the two sheets 55 and 56 in an extended state. The outer sheet 55 forms the outer surface of the diaper 1, the outer sheet 55 being adjacent to the inner sheet 56.

As shown in fig. 2, the exterior body 5 has a stretchable region G that stretches in the width direction Y by stretching of the elastic members 53 and 54. More specifically, the stretchable region G includes a waist stretchable region G1 formed on the outer side of the absorbent main body 4 in the longitudinal direction X and a lower stretchable region G2 formed on the crotch portion C side of the waist stretchable region G1. The lumbar stretch region G1 includes an abdominal side lumbar stretch region FG1 located on the abdominal side a side and a back side lumbar stretch region BG1 located on the back side B side, and the lower stretch region G2 includes an abdominal side lower stretch region FG2 located on the abdominal side a side and a back side lower stretch region BG2 located on the back side B side. In fig. 2, reference numeral 53 denotes an elastic member 53 disposed in the waist stretchable region G1, and reference numeral 54 denotes an elastic member 54 disposed in the waist lower stretchable region G2.

The waist stretch region G1 is formed outside each of the both ends 4a, 4b in the longitudinal direction X of the absorbent main body 4. The waist stretch region G1 is disposed at the waist of the wearer in the worn state.

The lower stretchable zone G2 is formed between the positions of the ends 4a, 4B of the absorbent main body 4 in the longitudinal direction X and the position of the lower end of the side seal 7 in the longitudinal direction X of the front side portion a and the back side portion B. In the lower stretch region G2, the elastic member 54 is disposed at least between the side seal 7 and the side edge in the width direction Y of the absorbent main body 4. In the lower stretchable region G2, the elastic members 54 are not disposed between the both side edges of the absorbent main body 4 in the width direction Y, or the elastic members 54 are disposed in a state where a process such as finely cutting is performed so as not to exhibit elastic stretchability.

The topsheet 2, the leakproof sheet 3, and the absorber 40 extend from the crotch portion C to a part of each of the abdomen-side portion a and the back-side portion B in the longitudinal direction X of the diaper 1.

As shown in fig. 4, the absorbent body 40 in the diaper 1 of the present embodiment includes an absorbent core 41 having liquid retention properties and a core-covering sheet 42 covering the skin-facing surface and the non-skin-facing surface of the absorbent core 41. The absorbent core 41 is composed of a water-absorbent polymer and hydrophilic fibers. The core-wrapped sheet 42 may be formed by wrapping the entire circumference of the absorbent core 41 with one core-wrapped sheet 42 as shown in fig. 4, or may be formed by wrapping the entire circumference of the absorbent core 41 with two or more core-wrapped sheets 42.

As shown in fig. 2, the absorber 40 includes: a high-grammage portion 43 located at the center portion in the width direction Y of the diaper 1 and extending in the longitudinal direction of the diaper 1; side low grammage portions 44 located on both sides of the high grammage portion 43 in the width direction Y; and a back-side low grammage portion 45 located on the outer side of the longitudinal end edge 43a of the high grammage portion 43 in the back-side portion B. The absorbent core 41 disposed in the high grammage portion 43 has a higher grammage than the absorbent core 41 disposed in the side low grammage portion 44 and the back low grammage portion 45, and thus the high grammage portion 43 is formed to have a higher grammage than the side low grammage portion 44 and the back low grammage portion 45. The grammage of the side low-grammage portion 44 and the backside low-grammage portion 45 may be the same or different, but is preferably the same, and for example, the difference in grammage is preferably within 20% of the grammage of the high-grammage portion.

The high grammage portion 43 extends in the longitudinal direction X of the absorbent main body 4. That is, the total length of the high grammage portion 43 in the longitudinal direction X is longer than the maximum length in the width direction Y of the back portion B. The high-grammage portion 43 is present at least in the back side portion B in the longitudinal direction X of the diaper 1. The high-grammage portion 43 is more preferably present in a range from the crotch portion C to a part of the back-side portion B in the longitudinal direction X of the diaper 1, and is preferably present in a part or the entire region from the crotch portion C to each of the stomach-side portion a and the back-side portion B as shown in fig. 2. In the high grammage portion 43 shown in fig. 2, an end 43a of the high grammage portion 43 on the side of the front side portion a is located on the front side portion a, and an end 43B of the high grammage portion 43 on the side of the back side portion B is located on the back side portion B. The width of the ventral portion a is larger than that of the dorsal portion B, and the ventral portion a has a substantially T-shape in plan view. The length of the width direction of the high grammage part 43 in the present invention can be even in the range of the total length of the length direction X. The edge 43a of the high grammage portion 43 on the stomach-side portion a side may be located in the crotch portion C.

The high grammage portion 43 can be formed by various methods. For example, the high grammage portion 43 may be formed by increasing the amount of stacked fibers (fiber stacking) of the constituent material of the absorbent core 41 to be larger than the amount of surrounding portions, or the high grammage portion 43 may be formed by stacking a plurality of absorbent cores 41. In the diaper 1, the absorbent core 41 is laminated in two layers to form the high grammage portion 43.

The side low grammage portions 44, 44 are located on both sides of the high grammage portion 43 in the width direction Y. The side low grammage portion 44 is lower in grammage than the high grammage portion 43. The side low grammage portion 44 extends in the longitudinal direction X of the absorbent main body 4. The position of the end edge on the back side portion B side of the side low grammage portion 44 in the longitudinal direction X coincides with the end edge 43B on the back side portion B side of the high grammage portion 43. The edge of the side low grammage portion 44 on the ventral portion a side may be closer to the ventral portion a side than the edge 43a of the high grammage portion 43 on the ventral portion a side, or may be closer to the back portion B side. In the diaper 1, the edge on the side of the stomach-side portion a of the side low grammage portion 44 is closer to the stomach-side portion a than the edge 43a on the side of the stomach-side portion a of the high grammage portion 43.

The back-side low grammage portion 45 is located further outward in the longitudinal direction X than the end edge 43B of the high grammage portion 43 on the back-side portion B side. The backside low grammage portion 45 has a lower grammage than the high grammage portion 43. The back-side low grammage portion 45 is disposed at a position overlapping the high grammage portion 43 in the Y direction. The length of the back-side low grammage portion 45 in the Y direction is preferably substantially the same as the width of the high grammage portion 43 of the back-side portion B, and more preferably longer than the width of the high grammage portion 43.

As shown in fig. 1 and 3, a disposal tape 10 is provided on the non-skin-facing surface of the back side portion B of the diaper 1. The waste tape 10 is a tape for maintaining the waste form of the diaper 1. The disposal tape 10 is located at a substantially central portion in the width direction Y of the back side portion B of the diaper 1. The disposal tape 10 is disposed so that the longitudinal direction thereof coincides with the longitudinal direction X of the diaper 1.

Fig. 5 shows a cross-sectional structure of the disposal tape 10 in a three-folded state. The waste tape 10 is mainly composed of 3 portions. Specifically, the disposal tape 10 includes a fixed portion 12, an extended portion 15, and a fastening portion 18. These 3 portions are sequentially arranged along the longitudinal direction X1 of the disposal tape 10. These 3 portions are sequentially laminated in a three-fold state. There are no other parts between the fixed part 12 and the extension 15, and they are directly connected. Similarly, there is no other member between the extension portion 15 and the fastening portion 18, and both are directly connected. In fig. 5, for convenience of explanation, a gap is shown between the fixing portion 12 and the extension portion 15 and between the extension portion 15 and the fastening portion 18.

The fixing portion 12 of the disposal tape 10 has a fixing portion sheet 13. The fixing portion sheet 13 has a first surface 13a and a second surface 13 b. In the disposal tape 10 in the three-folded state, the first surface 13a of the fixing portion sheet 13 faces the extension portion 15 and the second surface 13b faces the outer surface of the diaper 1 except for a folded portion 13' described later. The fixing portion 12 has a fixing portion adhesive portion 14. The fixing portion adhesive portion 14 is provided on the second surface 13b of the fixing portion sheet 13. The fastening portion 12 is fastened to the outer surface of the back side portion B of the diaper 1 by a fastening portion adhesive portion 14. The disposal tape 10 is fixed to the outer surface of the back side portion B of the diaper 1 by the fixing adhesive portion 14 in a non-detachable manner. As a method for fixing the waste tape 10 to the outer surface of the diaper 1, a known method such as an adhesive such as a hot-melt adhesive or welding can be used.

The extension portion 15 of the waste tape 10 is a portion that is easily extended with a weak tensile force when a tensile force is applied to the waste tape 10, and increases the length of the waste tape 10. The extension 15 has an extension sheet 16. The extension sheet 16 may be the same length as the fixing section sheet 13 described above, or may be a different length. The extension sheet 16 may have the same width as the fixing sheet 13 or a different width. The extension sheet 16 has a first face 16a and a second face 16 b. In the disposal tape 10 in the three-folded state, the extension sheet 16 has a first surface 16a facing the fastening portion 18 and a second surface 16b facing the fixing portion 12, except for a folded portion 16' described later. The extension 15 has an extension adhesive portion 17. The extension adhesive part 17 is provided on the second surface 16b of the extension sheet 16. The extension adhesive portion 17 is an adhesive portion for joining the extension portion 15 and the fixing portion 12 of the disposal tape 10 in the three-folded state in a releasable manner. Therefore, the extension adhesive part 17 is preferably made of an adhesive agent having low adhesiveness.

The fixing portion sheet 13 of the fixing portion 12 described above has a folded portion 13' folded back toward the extended portion 15 at one end in the longitudinal direction X1 of the disposal tape 10. And, the folded back portion 13' is joined to one end of the sheet for an extension 16 in the extension 15 on the side of the second face 16 b. Thus, the fixing portion 12 and the extension portion 15 are directly connected. As a method of connecting the fixing portion 12 and the extension portion 15, a known method such as an adhesive such as a hot-melt adhesive or welding can be used.

The fastening portion 18 of the disposal tape 10 can be fastened to an arbitrary position on the outer surface of the diaper 1, and is a portion fastened to the outer surface of the diaper 1 when the disposal form of the diaper 1 is maintained by the disposal tape 10. The fastening portion 18 forms a tip end region of the disposal tape 10 and has a fastening portion sheet 19. The fixing portion sheet 19 may be the same length as the fixing portion sheet 13 or the extension portion sheet 16, or may be different in length. The fastening portion sheet 19 may have the same width as the fixing portion sheet 13 or the extension portion sheet 16, or may have a different width. The fastening section sheet 19 has a first surface 19a and a second surface 19 b. In the disposal tape 10 in the three-folded state, the second surface 19b of the fastening section sheet 19 faces the extension section 15. The fastening section 18 has a fastening section adhesive section 20. The fastening portion adhesive portion 20 is provided on the second surface 19b of the fastening portion sheet 19. The fastening portion adhesive portion 20 is a member for releasably joining the fastening portion 18 of the disposal tape 10 in the three-folded state and the extension portion 15, and fastening the fastening portion 18 to an appropriate portion of the outer surface of the diaper 1. From this viewpoint, the degree of adhesiveness of the adhesive section for fastening section 20 is preferably determined.

In the extension sheet 16 of the extension 15 described above, one end in the longitudinal direction X1 is folded back toward the fastening portion 18 to form a folded-back portion 16'. The folded-back portion 16' is joined to one end of the fastening portion sheet 19 of the fastening portion 18 on the side of the second surface 19 b. Thereby, the extension portion 15 and the fastening portion 18 are directly connected to each other. As a method of connecting the extension portion 15 and the fastening portion 18, a known method such as an adhesive such as a hot-melt adhesive or welding can be used.

Further, a grip piece 21 is joined to the second surface 19b side at the other end of the fixing section sheet 19 in the fixing section 18. The tab piece 21 is a piece separate from the fixing portion piece 19.

The waste tape 10 composed of 3 portions as described above is folded in a zigzag shape into three folds. The disposal tape 10 is attached to the back side portion B of the diaper 1 so that the free end of the disposal tape 10 in the three-folded state, that is, the attachment portion of the tab 21 in the fastening portion 18 faces the waist opening 1W side of the diaper 1.

The extension portion 15 can be extended in the longitudinal direction X1 of the disposal tape 10 in the unfolded state where the three-fold state is released. More specifically, the portions of the extended portion sheet 16 other than the portions joined to both ends of the fixing portion sheet 13 or the fastening portion sheet 19 can be extended in the longitudinal direction X1. Here, the unfolded state in which the three-folded state is released refers to a state in which the three-folded waste tape 10 is linearly unfolded by peeling the extension portion 15 of the waste tape 10 from the fixing portion 12 and peeling the extension portion 15 from the fastening portion 18. In the unfolded state, the disposal tape 10 can be extended by the force of a person, and at this time, the extension portion 15 can be extended.

It is also preferable that the extension portion 15 is extendable and contractible in the longitudinal direction X1 of the disposal tape 10 in the unfolded state in which the three-folded state is released. The term "stretchable" means to be elongated when a tensile force is applied to the waste tape 10 and to be contracted when the tensile force is released. In this manner, when the diaper 1 is discarded, the disposal tape 10 is stretched and fixed to the non-skin-facing surface of the diaper 1, and then the diaper 1 wound up in a roll can be tightened so as not to be opened.

The disposal tape 10 in a three-folded state is disposed in the width range P of the high grammage portion 43 of the back portion B along the longitudinal direction X of the diaper 1. The width range P of the high grammage part 43 includes not only a region P1 between both side edges 43e, 43e of the high grammage part 43 in the longitudinal direction X but also a region P2 (see fig. 2) between extension lines 43P, 43P obtained by extending the side edges 43e, 43e toward the back side part B. The disposal tape 10 in the three-folded state is preferably located within the width range P of the high grammage portion 43 by at least half of the length in the width direction Y thereof, and preferably located within the width range P of the high grammage portion 43 as a whole. The center position in the width direction Y of the waste tape 10 is located on the longitudinal center line CL. The disposal tape 10 and the high grammage portion 43 preferably coincide with each other at the center in the width direction Y.

In the disposal tape 10 in the three-folded state, at least a part thereof may be located in the back-side low grammage portion 45, and preferably, as shown in fig. 1, the entire portion thereof is located in the back-side low grammage portion 45. As an embodiment in which at least a part of the disposal tape 10 in the three-folded state is located in the back-side low grammage portion 45, there can be mentioned: a mode in which a part of the fixing portion 12 is positioned at the back-side low grammage portion 45; the whole of the fixing portion 12 is located in the high grammage portion 43, and the end portion of the fixing portion 18 on the back side portion B side extends from the folded portion 13' of the fixing portion 12 and is located in the back side low grammage portion 45.

Fig. 6(a) shows a disposal form of the diaper 1 when the used diaper 1 is disposed of. When the diaper 1 is discarded, the diaper 1 is rolled up from the crotch portion C toward the waist opening portion 1W, and is rolled up as shown in fig. 6 (b). In the rolled diaper 1, the disposal tape 10 provided in the back side portion B is exposed outside the rolled diaper 1.

Next, as shown in fig. 6(b), in a state where the rolled-up diaper 1 is held by one hand, the tab 21 is grasped and pulled by the other hand, the three-folded state of the waste tape 10 is released, the extension portion is stretched, and the waste tape 10 is wrapped around the outer periphery of the rolled-up diaper 1, and the fastening portion 18 is fastened to an appropriate position on the outer peripheral surface of the rolled-up diaper 1. Fig. 6(a) shows an example in which the fixing portion 18 is fixed to the fixing portion 12, but the position at which the fixing portion 18 is fixed is not limited to the constituent members of the disposal tape 10.

In the diaper 1 of the present embodiment, the disposal tape 10 is disposed along the longitudinal direction X of the diaper 1 in the width range of the high grammage portion 43 in the back side portion B, and at least a part thereof is located at the back side low grammage portion 45, so that the diaper 1 after use can be disposed in a disposal state in which it is kept in a rolled state, and when the diaper 1 is rolled and held, the portion having the high grammage portion inside can be firmly held by one hand while being pressed with the thumb, as shown in fig. 6 (B). Further, when the disposal tape 10 in the three-folded state is stretched, the disposal tape 10 in the three-folded state is arranged along the longitudinal direction of the diaper 1 within the width range P of the high grammage portion 43, so that even if the disposal tape 10 is stretched while the extension portion 15 is extended, the position of the extended disposal tape 10 is less likely to come into contact with both sides of the diaper 1 in the width direction, and the disposal tape 10 can be wound so as to overlap the waist opening 1W at a position near the center portion of the back side portion B in the width direction. Further, when the disposal tape 10 is fixed to the outer peripheral portion of the rolled diaper 1, the portion having the high grammage portion 43 therein is present in a state of being less likely to be deformed than the portion having the side low grammage portion 44 therein, and therefore, the worker can easily dispose the elongated disposal tape 10 on the portion of the rolled diaper 1 having the high grammage portion 43 therein.

As described above, according to the diaper 1 of the present embodiment, when the absorbent article is formed into a disposal form, the disposal tape can be easily fixed to an appropriate position of the absorbent article wound into a roll, whereby the rolled form of the diaper 1 can be stably maintained, and a stable disposal form in which the diaper is less likely to be deformed and leakage of excrement can be obtained.

In the diaper 1 of the present embodiment, when the disposal tape 10 is extended in the longitudinal direction X of the diaper 1 to dispose of the diaper 1, the disposal tape 10 can be prevented from being displaced, and the disposal tape 10 can be easily attached to a desired position.

As described above, in the diaper 1 formed in the disposal form, the fastening portion 18 of the disposal tape 10 is fastened to the non-skin-facing surface of the diaper 1. In order to facilitate the fastening of the fastening portion 18 to the non-skin-facing surface of the diaper 1, the non-skin-facing surface of the diaper 1 is preferably flat. For example, from the viewpoint of preventing the generation of irregularities on the non-skin-facing surface of the diaper 1 due to the swollen water-absorbent polymer when the water-absorbent polymer of the absorbent core 41 swells due to the absorption of excrement by the absorber 40, and keeping the non-skin-facing surface of the diaper 1 flat, it is preferable that the ratio of the mass of the hydrophilic fiber on the non-skin-facing surface side of the absorbent core 41 in the high grammage part 43 to the total mass of the water-absorbent polymer and the hydrophilic fiber is higher than that on the skin-facing surface side of the absorbent core 41 in the high grammage part 43.

When a virtual line S is assumed where the absorbent core 41 in the high grammage portion 43 is divided into two parts in the thickness direction Z, the non-skin-facing surface side of the absorbent core 41 is a portion 41b closer to the non-skin-facing surface side than the virtual line S, and the skin-facing surface side of the absorbent core 40 is a portion 41a closer to the skin-facing surface side than the virtual line S (see fig. 4). It is assumed that the virtual line S bisects the thickness of the absorbent core 41 in the high grammage portion.

The ratio of the mass of the hydrophilic fiber to the total mass of the water-absorbent polymer and the hydrophilic fiber on the non-skin-facing surface side in the absorbent core 41 is preferably 50 mass% or more, more preferably 60 mass% or more, further preferably 100 mass% or less, more preferably 99 mass% or less, further preferably 50 mass% or more and 100 mass% or less, and more preferably 60 mass% or more and 99 mass% or less.

The ratio of the mass of the hydrophilic fiber to the total mass of the water-absorbent polymer and the hydrophilic fiber on the skin-facing surface side of the absorbent core 41 is preferably 10 mass% or more, more preferably 15 mass% or more, further preferably 70 mass% or less, more preferably 60 mass% or less, further preferably 10 mass% or more and 70 mass% or less, more preferably 15 mass% or more and 60 mass% or less.

The ratio of the mass of the hydrophilic fiber to the total mass of the water-absorbent polymer and the hydrophilic fiber can be measured as follows.

First, 10 measurement samples were cut from the skin-facing surface side and the non-skin-facing surface side of the absorbent core 41. Then, the mass of the water-absorbent polymer and the mass of the hydrophilic fiber in each of the 10 measurement samples were measured on the skin-facing surface side and the non-skin-facing surface side, and the ratio of the mass of the hydrophilic fiber in each measurement sample to the total mass of the water-absorbent polymer and the hydrophilic fiber was calculated. Then, the average value of the calculated ratio of the mass of the hydrophilic fiber to the total mass of the water-absorbent polymer and the hydrophilic fiber is defined as the ratio of the mass of the hydrophilic fiber on the skin-facing surface side or the non-skin-facing surface side in the absorbent core 41 to the total mass of the water-absorbent polymer and the hydrophilic fiber. In the case of the adhesive, the adhesive is dissolved in a solvent and then measured.

In the absorber 40 of the diaper 1 of the present embodiment, the core sheet 42 is constituted by one sheet 42, and has a superposed portion 42a in which both end portions in the width direction Y of the sheet 42 are superposed on the non-skin-facing surface side of the absorbent core 41. The overlapping portion 42a of the core sheet 42 extends in the longitudinal direction X of the absorber 40 and is disposed at a position overlapping the high grammage portion 43 in a plan view of the diaper 1. The diaper 1 in plan view is the diaper 1 in an extended state in plan view.

By overlapping the overlapping portion 42a of the core sheet 42 with the high grammage portion 43, for example, when the absorbent core 41 swells due to absorption of excrement by the absorber 40, it is possible to suppress generation of irregularities on the non-skin-facing surface of the diaper 1 due to the swollen absorbent polymer, and to easily keep the non-skin-facing surface of the diaper 1 flat. This enables the elongated waste tape 10 to be fixed to an appropriate position more stably. At least a part of the overlapping portion 42a may overlap the high grammage portion 43.

The maximum length of the overlapping portion 42a in the width direction Y of the back portion B is preferably 20% or more, more preferably 30% or more, preferably 90% or less, more preferably 80% or less, and further preferably 20% or more and 90% or less, more preferably 30% or more and 80% or less of the maximum length of the high grammage portion 43 in the width direction Y of the back portion B.

In the diaper 1 of the present embodiment, a part of the disposal tape 10 overlaps the overlapping portion 42a of the core sheet 42 in a plan view of the diaper 1. Since the non-skin-facing surface of the diaper 1 is less likely to be uneven in the superposed portion 42a and the non-skin-facing surface of the diaper 1 is likely to be kept flat, the portion of the non-skin-facing surface of the diaper 1 where a portion of the disposal tape 10 is disposed tends to be flat when a portion of the disposal tape 10 is superposed on the superposed portion 42 a. This allows the elongated waste tape 10 to be fixed to an appropriate position in a more stable state.

In the diaper 1 of the present embodiment, at least a part of the disposal tape 10 may overlap the overlapping portion 42a of the core sheet 42 in a plan view of the diaper 1, and preferably the entire disposal tape 10 overlaps the overlapping portion 42a of the core sheet 42 in a plan view of the diaper 1.

The length D (see fig. 3) in the width direction Y of the diaper 1 of the disposal tape 10 may be the same as or different from the length T (see fig. 3) in the width direction Y of the diaper 1 of the overlapping portion 42a of the core sheet 42. When the length D of the diaper 1 in the width direction Y of the disposal tape 10 is different from the length T of the overlapping portion 42a of the core sheet 42 in the width direction Y, the length D of the disposal tape 10 in the width direction Y of the diaper 1 may be shorter than the length T of the overlapping portion 42a in the width direction Y or longer than the length T of the overlapping portion 42a in the width direction Y, but from the viewpoint of enabling the disposal tape 10 to be entirely overlapped with the overlapping portion 42a, the length D is preferably shorter than the maximum length T of the overlapping portion 42a in the width direction Y. When the entire disposal tape 10 is overlapped with the overlapped portion 42a, the portion of the non-skin-facing surface of the diaper 1 where the entire disposal tape 10 is disposed is easily flattened, and the elongated disposal tape 10 can be fixed to an appropriate portion in a more stable state.

From the viewpoint of enabling the entire disposal tape 10 to overlap the overlapping portion 42a, the ratio D/T of the maximum length D of the disposal tape in the width direction Y to the length T of the overlapping portion 42a in the width direction Y is preferably 0.9 or less, more preferably 0.8 or less, from the viewpoint of strength for preventing the disposal tape 10 from breaking, preferably 0.2 or more, more preferably 0.3 or more, and from the viewpoint of compatibility with these, preferably 0.2 or more and 0.9 or less, more preferably 0.3 or more and 0.8 or less (see fig. 3).

In order to facilitate grasping of a portion having the high grammage portion 43 inside when the diaper 1 is rolled up, it is preferable that the high grammage portion 43 be easily recognized. Examples of a method for making the high grammage portion 43 easily recognizable include a method for making the high grammage portion 43 easily rise toward the non-skin-facing surface side in the rolled diaper 1 and a method for visually recognizing the high grammage portion 43 in the rolled diaper 1.

In order to make the high grammage portion 43 easily rise to the non-skin-facing surface side in the rolled diaper 1, it is preferable that, as shown in fig. 3, an elastic member 47 that contracts in the longitudinal direction X at a portion overlapping with the absorber 40 in a plan view of the diaper 1 is disposed outside both side edges 43e, 43e of the high grammage portion 43 in the width direction Y. Thus, the elastic member 47 can contract in the longitudinal direction X, whereby the side low grammage portions 44, 44 located on both sides of the high grammage portion 43 can contract in the longitudinal direction X. Since the side low grammage portion 44 is contracted in the longitudinal direction X and thereby raised toward the skin-facing surface side, the high grammage portion 43 is relatively easily positioned on the non-skin-facing surface side, the high grammage portion 43 is easily raised toward the non-skin-facing surface side, and the high grammage portion 43 is easily protruded, and the disposal tape 10 can be fixed in a more appropriate position in a stable state.

Further, it is also preferable that an elastic member 52a which can contract in the width direction Y be disposed at a position overlapping the side low grammage portion 44 in a plan view of the diaper 1. In the diaper 1 of the present embodiment, the elastic member 52 is disposed along the leg opening 1L, and the elastic member 52 has a portion 52a extending in the width direction Y. The portion 52a overlaps the side low grammage portion 44 in a plan view of the diaper 1. Accordingly, when the portion 52a of the elastic member 52 contracts in the width direction Y, the side low grammage portion 44 is bent in the width direction Y and easily stands up toward the skin-facing surface side, and the high grammage portion 43 is easily brought into a form relatively protruding toward the non-skin-facing surface side, so that the disposal tape 10 can be fixed in a more appropriate position in a stable state.

It is also preferable that the absorbent main body 4 and the outer cover 5 have a portion which is not joined at a position overlapping the side low grammage portion 44 in a plan view of the diaper 1. For example, it is preferable that the adhesive for joining the absorbent main body 4 and the exterior body 5 is not applied to a part of the position overlapping the side low grammage portion 44, and it is more preferable that the adhesive is not applied to the entire region of the position overlapping the side low grammage portion 44. By having the portion where the absorbent body 4 and the outer cover 5 are not joined at the position overlapping the side low grammage portion 44, when the user holds the diaper 1 with the non-skin-facing surface of the back side portion B in the rolled-up diaper 1 facing the user himself, the portion corresponding to the side low grammage portion 44 in the diaper 1 is likely to move to the skin-facing surface side. The portions corresponding to the side low grammage portions 44 are likely to move toward the skin-facing surface side, and the portions corresponding to the high grammage portions 43 are likely to bulge toward the non-skin-facing surface side, thereby being likely to be in a convex form. This makes it easier to fix the disposal tape 10 in a stable state at a more appropriate position.

The lower stretchable region G2 preferably has a higher stretching stress than the waist stretchable region G1. Accordingly, the side low grammage portion 44 can be easily raised toward the skin-facing surface side, and therefore the high grammage portion 43 can be easily formed to be relatively convex toward the non-skin-facing surface side, and the disposal tape 10 can be fixed at a more appropriate position in a stable state.

The stretch stress in the lower stretch region G2 is preferably 105% or more, more preferably 110% or more, further preferably 300% or less, more preferably 250% or less, further preferably 105% or more and 300% or less, more preferably 110% or more and 250% or less, as compared with the stretch stress in the waist stretch region G1.

The stretching stress in the lower stretchable zone G2 and the waist stretchable zone G1 was measured by the following method.

[ method of measuring expansion stress ]

Taking the diaper 1 as an example, the side seal S of the diaper 1 is torn to place the diaper 1 in an unfolded state, and the measurement target site of the extension/contraction stress is cut out from the outer package 5 in an extended state as a measurement sample in a rectangular shape having a long width direction Y in a plan view. In this cutting, not only the outer package but also the entire diaper including the absorbent main body and the like is cut. First, the abdomen-side waist stretch region FG1 is cut in the product width direction, and the abdomen-side waist stretch region FG1 is cut in a rectangular shape. This was used as a measurement sample of the abdominal-side waist stretch region FG 1. Similarly, the lower abdomen-side stretch region FG2 is cut in the product width direction, and the abdomen-side lower stretch region FG2 is cut in a rectangular shape. This was used as a measurement sample of the ventral lower stretch region FG 2. In the same manner, measurement samples of the lumbar stretching region BG1 on the back side and the lower stretching region BG2 on the back side were obtained. With respect to each measurement sample cut out, the length in the longitudinal direction X of the diaper 1 and the length in the width direction Y of the diaper 1 (when the product is developed (100%)) are measured in advance. Next, the measurement sample is fixed between chucks of a tensile tester (for example, "RTA-100" manufactured by Orientec corporation) so that the longitudinal direction of the measurement sample coincides with the tensile direction. The inter-chuck distance was set to 100 mm. Next, the measurement sample was fixed between the chucks, and the tensile load (N) when the chuck distance was increased at a speed of 300mm/min to a length at which the elongation of the measurement sample became 80 and then decreased to a length at which the elongation of the measurement sample became 71 was measured was determined as the stress (N) of the measurement sample. The elongation is a ratio of the length of the measurement sample in the longitudinal direction to the total length of the measurement sample after the measurement sample is elongated in the longitudinal direction, assuming that the total length of the measurement sample in the longitudinal direction is 100. For example, when the length of the measurement specimen in the longitudinal direction is 350mm, the length of the measurement specimen in the longitudinal direction at an elongation of 80 is 280mm, and the length of the measurement specimen in the longitudinal direction at an elongation of 71 is 250 mm. Then, the value obtained by dividing the obtained stress (N) by the length of the diaper 1 in the longitudinal direction X measured in advance was defined as the extension/contraction stress (N/mm) of the measurement sample.

The method of making the stretchable stress of the lower stretchable zone G2 higher than the stretchable stress of the waist stretchable zone G1 is not particularly limited, and various known methods can be used. For example, the fineness of the elastic members 54 disposed in the lower stretchable zone G2 may be set to be higher than the fineness of the elastic members 53 disposed in the waist stretchable zone G1.

The fineness of the elastic member 54 disposed in the lower stretchable zone G2 is preferably 150% or more, more preferably 200% or more, and further preferably 300% or less, more preferably 280% or less, and further preferably 150% or more and 300% or less, more preferably 200% or more and 280% or less, with respect to the fineness of the elastic member 53 disposed in the waist stretchable zone G1.

The fineness of the elastic member 54 disposed in the lower stretchable region G2 is preferably 390dtex or more, more preferably 470dtex or more, further preferably 940dtex or less, more preferably 780dtex or less, further preferably 390dtex or more and 940dtex or less, more preferably 470dtex or more and 780dtex or less.

The fineness of the elastic member 53 disposed in the waist stretch region G1 is preferably 180dtex or more, more preferably 200dtex or more, further preferably 620dtex or less, more preferably 470dtex or less, further preferably 180dtex or more and 620dtex or less, more preferably 200dtex or more and 470dtex or less.

As another method of making the extension and contraction stress of the lower stretchable zone G2 higher than the extension and contraction stress of the waist stretchable zone G1, for example, the extension magnification of the elastic member 54 disposed in the lower stretchable zone G2 may be made larger than the extension magnification of the elastic member 53 disposed in the waist stretchable zone G1. The elongation ratio was measured by the following method.

[ method of measuring elongation Rate ]

First, the stretchable region is stretched to the maximum extent in the stretching direction, and two marks are marked from the sheet with an oil pen at a constant interval L0 (for example, 100mm) in the stretching direction with respect to the elastic member. At this time, since the ink of the oil-based pen penetrates through the sheet, the elastic member can be marked with the above-mentioned mark. Next, the elastic member between the two marks is cut out from the elastic member in the expansion and contraction region. The length L1 of the cut elastic member was measured in a non-stretched state. Next, the elongation ratio is determined by the following formula [ A ].

Elongation (%) (L0/L1) × 100 … [ a ]

The extension ratios of all the elastic members arranged in the stretchable region were determined, and the average value of these ratios was defined as "average extension ratio".

The longitudinal length of the waist stretch region G1 may be the same or different between the abdomen side and the back side. Similarly, the longitudinal lengths of the lower stretchable region G2 may be the same or different between the ventral side and the dorsal side.

The expansion and contraction stresses in the lower expansion and contraction region G2 may be the same or different between the ventral side and the dorsal side, but more preferably, the dorsal lower expansion and contraction region BG2 has a lower expansion and contraction stress than the ventral lower expansion and contraction region FG 2. Thus, the back side portion B having the disposal tape can easily cover the absorbent main body at the time of disposal, and the waste can be disposed of without being exposed.

The method of making the stretching stress of the dorsal lower stretching region BG2 lower than the stretching stress of the ventral lower stretching region FG2 is not particularly limited, and various known methods can be used. For example, the fineness of the elastic member 54b disposed in the back-side lower stretchable region BG2 may be smaller than the fineness of the elastic member 54f disposed in the abdominal-side lower stretchable region FG 2.

The fineness of the elastic member 54f disposed in the ventral lower stretching region FG2 is preferably 120% or more, more preferably 150% or more, further preferably 250% or less, more preferably 230% or less, further preferably 120% or more and 250% or less, more preferably 150% or more and 230% or less, with respect to the fineness of the elastic member 54b disposed in the dorsal lower stretching region BG 2.

The fineness of the elastic member 54f disposed in the abdominal-side lower stretchable region FG2 is preferably 450dtex or more, more preferably 470dtex or more, and further preferably 940dtex or less, more preferably 780dtex or less, and further preferably 450dtex or more and 940dtex or less, and more preferably 470dtex or more and 780dtex or less.

The fineness of the elastic member 54b disposed in the back-side lower stretchable region BG2 is preferably 390dtex or more, more preferably 420dtex or more, further preferably 850dtex or less, more preferably 700dtex or less, further preferably 390dtex or more and 850dtex or less, more preferably 420dtex or more and 700dtex or less.

As another method of making the stretching stress of the back-side lower stretching region BG2 lower than the stretching stress of the abdominal-side lower stretching region FG2, for example, the extension ratio of the elastic member 54b disposed in the back-side lower stretching region BG2 may be smaller than the extension ratio of the elastic member 54f disposed in the abdominal-side lower stretching region FG 2.

In order to make the high grammage portion 43 visually recognizable in the rolled diaper 1, it is preferable that, for example, a first pattern portion having a pattern 8 visually recognizable from the outside is formed in the diaper 1 at a position overlapping the high grammage portion 43 in a plan view of the diaper 1. Accordingly, the user can visually recognize the pattern on the diaper 1 in the rolled-up form and recognize the position of the high grammage portion 43, and therefore, when the diaper 1 is rolled up, the user can easily grasp the high grammage portion 43, and can easily fasten the fastening portion 18 to the high grammage portion 43 by pressing the high grammage portion 43 with a finger or the like and extending the disposal tape 10 in the longitudinal direction X1.

From the viewpoint of facilitating visual recognition of the high grammage portion 43, it is preferable that the pattern formed in the first pattern portion is a vertically long pattern 81 in which the length a in the longitudinal direction X of the diaper 1 is longer than the length b in the width direction Y. Further, although not shown, instead of the longitudinal pattern 81, a pattern group including a main pattern and a peripheral accompanying pattern may be used as the pattern group, and it is also preferable that the length in the longitudinal direction X is longer than the length in the width direction Y. The accompanying pattern is a plurality of patterns surrounding the main pattern and smaller than the main pattern, and is considered to be a pattern accompanying the main pattern.

Further, the pattern formed in the first pattern portion preferably includes a pattern that functions as an indicator that changes color with excretion. The term "color change" as used herein includes, in addition to a mode of changing from a certain color to another color, a so-called "color development" in which a colorless state is changed to a colored state, and a so-called "color loss" in which a colored state is changed to a colorless state. Since the pattern formed in the first pattern portion includes the pattern that functions as the indicator, the user can visually recognize the pattern that functions as the indicator when the diaper 1 is rolled up and recognize the position of the high-grammage portion 43, and therefore, when the diaper 1 is rolled up, the user can easily grip the high-grammage portion 43, press the high-grammage portion 43 with fingers or the like more easily, and stretch the disposal tape 10 in the longitudinal direction X1 thereof, thereby fixing the fastening portion 18 to the high-grammage portion 43. Further, the change in color of the pattern that functions as an indicator can be used as a marker for the time to replace the diaper 1, and the diaper 1 can be quickly replaced with a new diaper after the change in color of the pattern that functions as an indicator, thereby avoiding the skin problem of the wearer due to wetness.

The pattern that functions as an indicator can be formed using a material containing a coloring material that changes color when brought into contact with bodily excreta including moisture such as urine and sweat, and can be formed using a material that has been used as an indicator in absorbent articles of the type described in the related art as appropriate. As the color material constituting the pattern that functions as an indicator, for example, a mixture of a pH indicator and an oxidizing compound can be used.

In the diaper 1, a pattern that functions as an indicator can be formed by applying an indicator composition containing a color material or the like to the first pattern portion. As the indicator composition, for example, a composition obtained by blending a material such as a coloring material, which is required to exhibit an indicator function, with a known hot melt adhesive can be used.

The pattern that functions as the indicator mark is preferably longer in the longitudinal direction X of the diaper 1 than the extended length in the longitudinal direction X of the disposal tape 10 in the non-extended state in which the three-folded state is released. Meanwhile, the length of the pattern in the longitudinal direction X is preferably shorter than the length of the disposal tape 10 in the longitudinal direction X in the extended state in which the three-folded state is released. By adopting the mode, the following advantages are achieved: the portion where the pattern functioning as the indicator is formed can be used as a rough standard for the portion to which the waste tape 10 is fixed.

The length of the diaper 1 in the longitudinal direction X, which exhibits a pattern functioning as an indicator, is the length of the following (1) or (2).

(1) When the pattern that functions as the indicator is a single pattern, the length of the pattern from one end to the other end in the longitudinal direction X of the diaper 1 is referred to.

(2) When there are a plurality of patterns that function as the indicator marks, the length is from one end of the diaper 1 on the side of the abdomen side portion a in the longitudinal direction X of the pattern located closest to the abdomen side portion a to one end of the diaper 1 on the side of the back side portion B in the longitudinal direction X of the pattern located closest to the back side portion B.

The developed length of the disposal tape 10 in the longitudinal direction X in the non-extended state with the three-folded state released is the length of the disposal tape 10 in the longitudinal direction X from the end of the fixing portion 12 on the waist opening 1W side to the end of the fastening portion 18 on the opposite side to the extended portion 15 in the developed state with the three-folded state released and without extension. In the present embodiment, the end of the fixing portion 12 on the waist opening 1W side refers to the end of the fixing portion sheet 13 on the waist opening 1W side that is joined to the non-skin-facing surface of the diaper 1. In addition, in the case where the tab 21 is provided so as to extend from the fastening portion piece 19 at the end portion of the fastening portion 18 opposite to the extended portion 15, the end of the fastening portion 18 opposite to the extended portion 15 is the end of the tab 21 opposite to the extended portion 15, and in the case where the tab 21 is provided so as to extend from the tab 21, the end of the fastening portion 18 opposite to the extended portion 15 is the end of the fastening portion piece 19 opposite to the extended portion 15.

The developed length in the longitudinal direction X of the disposal tape 10 in the extended state (hereinafter, also referred to as the extended state length) in which the three-folded state is released is a length when the disposal tape is extended until the tensile load becomes 1N/mm, and can be measured by the following method.

[ method of measuring the length in the extended state ]

The disposal tape 10 is separated from the outer surface of the diaper 1, and the disposal tape 10 is unfolded. The waste tape 10 is mounted on a commercially available tensile testing machine (for example, model "AUTOGRAPH AG-X" manufactured by shimadzu corporation) so that the longitudinal direction of the waste tape coincides with the stretching direction and the measurement target portion of the waste tape 10 is positioned between chucks. The measurement target portion is a portion of the disposal tape 10 other than the fixed portion, and more specifically, a portion of the fixed portion 12 adjacent to the extension portion 15 and the tip portion (end portion on the side of the fastening portion 18) of the disposal tape 10 are sandwiched by a chuck. Then, the measurement target site was elongated in the longitudinal direction X1 at a speed of 300mm/min, and the length obtained by adding the length of the measurement target site when the tensile load per 1mm width of the waste tape 10 was 1N to the length of the portion (for example, 5mm) of the leading end portion of the waste tape 10 sandwiched between the chucks was defined as the elongated state length. The width of the "disposal tape 10 per 1mm width" is the width of the fastening part 15 before the extension.

The pattern functioning as the indicator mark may be formed of one or more substantially linear portions extending in the longitudinal direction X of the diaper 1, and in this case, the length of the pattern in the width direction Y is preferably smaller than the width of the disposal tape 10 when the extension portion 15 is extended by 100% in the longitudinal direction X. By adopting the mode, the following advantages are achieved: the portion where the pattern functioning as the indicator is formed can be used as a rough standard for pulling and fastening the waste tape 10 along the center in the width direction of the absorbent body. "substantially linear" includes not only linear but also a band shape having a certain width.

The width of the extension portion 15 of the disposal tape 10 when extended by 100% in the longitudinal direction X (hereinafter, also referred to as the extended-state width) can be measured by the following measurement method.

[ measuring method of the width in the extended state ]

The disposal tape 10 is separated from the outer surface of the diaper 1, and the disposal tape 10 is unfolded. The longitudinal direction of the waste tape was aligned with the stretching direction, and one end and the other end of the extension 15 of the waste tape 10 were sandwiched by chucks using a commercially available tensile tester (for example, model "AUTOGRAPH AG-X" manufactured by Shimadzu corporation, Ltd.). The elongation portion was elongated 100% in the longitudinal direction X1 at a speed of 300mm/min from a straightened state (the distance between chucks at this time is La) in which the elongation portion 15 did not elongate. That is, the extension portion 15 is extended to 2 times the distance La between chucks before extension. Then, when the extension portion 15 is extended by 100%, the width of the minimum width portion, which is the narrowest width portion of the extension portion 15, is defined as the extended-state width.

The length of the pattern in the width direction Y, which functions as an indicator, is the length of the following (1) or (2).

(1) When a pattern functioning as an indication mark is formed of 1 substantially linear portion, the pattern indicates the width of the linear portion.

(2) When the pattern functioning as the indicator is formed of a plurality of substantially linear portions, the pattern refers to a distance from one end of the linear portions located on the outer side to one end of the linear portions located on the other end in the width direction.

In order to make it easier to visually recognize the high grammage portion 43, it is preferable that the diaper 1 further include a second pattern portion having a pattern visually recognizable from the outside, the second pattern portion being formed at a position overlapping with one or both of the side low grammage portion 44 and the back low grammage portion 45 in a plan view in addition to the first pattern portion formed at a position overlapping with the high grammage portion 43. By making the pattern different between the first pattern portion and the second pattern portion, the position where the high grammage portion 43 is formed can be identified more clearly. Examples of the pattern that is different between the first pattern portion and the second pattern portion include a pattern in which the color tone of the pattern is different between the first pattern portion and the second pattern portion, a pattern in which the area ratio of the pattern is different between the first pattern portion and the second pattern portion, and a pattern in which the shape of the pattern is different between the first pattern portion and the second pattern portion. Hue differences refer to differences in any one or more of hue, lightness, chroma, and transparency. Fig. 1 shows an example of providing patterns 81, 82 different in area ratio and shape. The pattern formed in the second pattern portion may include a pattern that functions as an indicator.

The first pattern portion and the second pattern portion may be formed at positions where the pattern of the pattern portion can be visually recognized from the outside, and may be formed in any member of the diaper 1. The first pattern portion and the second pattern portion can be formed on the non-skin-facing surface of the outer sheet 55 of the outer package 5, for example. The first pattern portion and the second pattern portion may be formed on the inner sheet 56 and/or the leakproof sheet 3 of the absorbent main body 4. In the case where another member is disposed on the non-skin-facing surface side of the member on which the first pattern portion and the second pattern portion are formed, at least a portion of the other member corresponding to the first pattern portion and the second pattern portion is preferably transparent or translucent from the viewpoint of allowing the patterns of the first pattern portion and the second pattern portion to be visually recognized from the outside.

In the case where the first pattern portion and the second pattern portion are provided on a member forming the non-skin-facing surface of the diaper 1, the member is preferably a moisture-permeable resin film in terms of facilitating the fastening of the disposal tape 10.

In addition, in the case where the patterns formed in the first pattern portion and the second pattern portion include a pattern that functions as an indicator, it is preferable that the first pattern portion and the second pattern portion are formed on the skin-facing surface of the leakproof sheet 3 from the viewpoint of facilitating contact between excrement and the pattern that functions as an indicator.

As the leakproof sheet 3, a moisture-permeable resin film, a moisture-impermeable resin film, a liquid-impermeable laminated nonwoven fabric, or the like can be used. In the case of using a moisture-permeable resin film as the leakproof sheet, when a large amount of liquid is absorbed in the high-basis-weight portion, water vapor may move toward the outer surface side of the diaper, and the fastening portion 18 of the disposal tape may be difficult to fasten to the outer surface.

[ method of measuring area Rate ]

The diaper 1 is stretched and extended by tearing the side seals 7 of the diaper 1, and is fixed to a stand in a state where the leak-preventing sheet 3 is not wrinkled. An OHP sheet is placed on the developed barrier sheet 3, and first, the outer periphery of the barrier sheet 3 is traced along the edge of the barrier sheet 3. An OHP sheet with the contour of the leak-proof sheet 3 drawn is set as a sample SA. Next, in order to measure the area occupancy of the first pattern portion, another OHP sheet was placed on the leak-proof sheet, and the outer peripheries of all the first pattern portions were drawn. The OHP sheet on which the outer periphery of the first pattern portion is drawn is taken as a sample S1. Finally, in order to measure the area occupancy of the second pattern portion, another OHP sheet was placed on the leak-proof sheet, and the outer peripheries of all the second pattern portions were drawn. The OHP sheet on which the outer periphery of the second pattern portion is drawn is taken as a sample S2. The entire leakproof sheet is drawn in sample SA, only the first pattern part on the leakproof sheet is drawn in sample S1, and only the second pattern part on the leakproof sheet is drawn in sample S2. The samples SA, S1, and S2 are read by a scanner or the like, and the area of the entire leakproof sheet, the area of the first pattern portion, and the area of the second pattern portion are calculated. Then, the values calculated by the following equation are respectively set as the area ratio of the first pattern portion and the area ratio of the second pattern portion.

The area ratio (%) of the first pattern portion is the area of the first pattern portion/the area of the entire leakproof sheet

The area ratio (%) of the second pattern portion is the area of the second pattern portion/the area of the entire leakproof sheet

In order to make the extension portion 15 and the fastening portion 18 of the disposal tape 10 extensible, an appropriate material may be selected as the sheets 16 and 19 constituting the extension portion 15 and the fastening portion 18, respectively. Specifically, as a material constituting these sheets 16 and 19, for example, an extensible film can be used. Examples of such a film include a monolayer film and a multilayer film such as a coextruded film. Further, as a material constituting the extensible film, for example, polyolefin such as linear low density polyethylene is preferable. Further, at least 1 material selected from polyvinyl chloride, ethylene-vinyl acetate copolymer, and polyvinyl alcohol is also preferable. Further, it is also advantageous to use a material having a permanent set of at least 50%, more preferably at least 70%.

As the sheet 13 constituting the fixing portion 12, the same material as the constituent material of the above sheet may be used, or an arbitrary material that is not stretchable, that is, is not plastically deformable may be used. For example, any conventionally known material can be used without particular limitation, such as a resin sheet (plastic sheet, film, etc.), a nonwoven fabric, and a woven fabric. Even if the material of the fixing section sheet 13 is stretchable, the portion fixed to the non-skin-facing surface of the diaper 1 does not exhibit its stretchability.

As the extension adhesive portion 17 for releasably joining the extension 15 and the fixing portion 12 and the fastening adhesive portion 20 for releasably joining the fastening portion 18 and the extension 15, for example, a rubber-based adhesive and an acrylic adhesive are generally used, and a rubber-based adhesive is preferably used. Examples of the rubber-based adhesive include synthetic rubbers such as styrene-butadiene block copolymers and hydrogenated styrene-butadiene block copolymers, and blends of these synthetic rubbers and resins. Further, a heat seal adhesive, a hot melt adhesive, a melt-blown or fibrous adhesive, or an adhesive made of an adhesive or the like may be used.

The extension adhesive part 17 and the fastening adhesive part 20 may be formed on the entire second surface 16b of the extension sheet 16. The adhesive portions 17 and 20 may be formed at intervals. In this case, the adhesive portions 17 and 20 can be formed at intervals by applying the adhesive at intervals.

The disposal tape 10 provided on the non-skin-facing surface of the diaper 1 can be manufactured by partially laminating the fixing section sheet 13 on one end portion of the extension section sheet 16, partially laminating the fastening section sheet 19 on the other end portion of the extension section sheet 16, and joining and integrating the laminated sections by a known method such as an adhesive. In the laminated portion, a folded portion obtained by folding a part of the sheet may be formed as in the above-described embodiment.

As shown in fig. 2 and 4, the diaper 1 includes leakage preventing cuffs 6, 6 extending in the longitudinal direction X on both side portions of the absorbent main body 4 in the longitudinal direction X. The leakage preventive cuffs 6, 6 are formed by including a cuff forming sheet 61 having water repellency continuous over the entire length of the absorbent body 4 in the longitudinal direction X, and 1 or more cuff elastic members 62 fixed to the inner side of the cuff forming sheet 61 in the width direction Y in a state of being extended in the longitudinal direction X. The leakage preventing cuffs 6, 6 are fixed to the front sheet via cuff fixing portions (not shown) extending in the longitudinal direction X. The leakage preventing cuffs 6, 6 have cuff elastic members 62 and rise toward the skin-facing surface side.

As materials for the outer casing 5, the topsheet 2 included in the absorbent body 4, the leakproof sheet 3, the absorbent body 40, the leakproof cuffs 6, 6 and other components, the same materials as those conventionally used in the art can be used without particular limitation. The absorbent core can be constituted by, for example, a stacked body of hydrophilic fibers such as cellulose fibers typified by wood pulp, a mixed stacked body of the hydrophilic fibers and a water-absorbent polymer, a stacked body of a water-absorbent polymer, a stacked structure in which a water-absorbent polymer is held between 2 absorbent sheets, or the like. As the core sheet, for example, sheet paper made of hydrophilic fibers, liquid-permeable nonwoven fabric, or the like can be used.

The present invention has been described above based on preferred embodiments of the present invention, but the present invention is not limited to the above embodiments.

For example, as in the diaper shown in fig. 7, the absorbent article of the present invention may have a bend-inducing portion 49 (see fig. 7) at a position corresponding to the side edge 43e of the high grammage portion 43 in the width direction Y for facilitating bending of the diaper 1 along the side edge 43e of the high grammage portion 43. Since the diaper 1 has the bending guide portions at positions corresponding to the side edges 43e of the high grammage portion 43 in the width direction Y, the diaper 1 is easily bent along the side edges 43e of the high grammage portion 43 in the rolled-up diaper 1, so that the portion of the diaper 1 corresponding to the outside in the width direction Y of the high grammage portion 43 is easily bent toward the skin-facing surface side, and the high grammage portion 43 is easily brought into a relatively projecting form toward the non-skin-facing surface side. This makes it easier to fix the disposal tape 10 in a stable state at a more appropriate position.

The bend-inducing portion 49 may be configured to serve as a starting point for bending the diaper 1 along the side edge 43e of the high grammage portion 43, and for example, slits, grooves, or non-fiber-stacking portions may be provided in the absorbent core 41 as the bend-inducing portion 49. The slits are cut in the thickness direction of the absorbent core 41 and have no width. The groove is an elongated recess having a bottom with a predetermined width. The non-fiber-stacking portion is a portion where the bottom is removed from the groove and no fiber-stacking body such as hydrophilic fiber constituting the absorbent core 41 is present.

The length of the fold-inducing portion 49 in the longitudinal direction X of the diaper 1 is preferably longer than the length of the disposal tape 10 in the longitudinal direction X in the unfolded state in which the three-fold state is released and in the non-extended state. At the same time, the length of the bending-inducing portion 49 in the longitudinal direction X is preferably shorter than the length of the disposal tape 10 in the longitudinal direction X in the extended state in which the three-folded state is released. In this way, the position of the high grammage portion 43 in the crotch portion is projected and easily visually recognized, and can be used as a rough standard for fastening the disposal tape 10 to the center in the width direction of the absorbent body. The "non-extended state" and the "extended state" refer to the above states.

The absorbent article of the present invention preferably has a non-joined portion 9 where the absorbent main body 4 and the outer cover 5 are not joined at a position overlapping the side low grammage portion 44 in a plan view of the diaper 1, as in the diaper shown in fig. 7. By providing the non-joined portion 9, in the rolled-up state of the diaper, the portion corresponding to the outer side of the high grammage portion 43 in the width direction Y is easily bent toward the skin-facing surface side, and the high grammage portion 43 is easily formed to be relatively convex toward the non-skin-facing surface side. This makes it easier to fix the disposal tape 10 in a stable state at a more appropriate position. From the same viewpoint, as shown in fig. 4 or 7, the absorbent main body 4 is preferably provided with elastic members 47 and 48 that stretch and contract in the longitudinal direction on the outer sides of both side edges of the high grammage portion 43.

In the above embodiment, the absorbent core 41 is included in the side low grammage part 44 and the back low grammage part 45, but either one or both of the side low grammage part 44 and the back low grammage part 45 may not include the absorbent core 41. In other words, the core-covering sheet 42 may extend from the absorbent core 41, and the extended portion may constitute the side low grammage portion 44 or the back side low grammage portion 45. In this case, the portion where the absorbent core 41 exists can be the high grammage portion 43. In the case where the side low grammage portion 44 or the back low grammage portion 45 does not include the absorbent core 41 and is constituted only by the core sheet 42, the side low grammage portion 44 or the back low grammage portion 45 is more likely to bend than the high grammage portion 43, and therefore, in the rolled-up diaper 1, the side low grammage portion 44 or the back low grammage portion 45 is more likely to bend toward the skin-facing surface side, and the high grammage portion 43 is more likely to be in a form relatively protruding toward the non-skin-facing surface side.

Further, although not shown, a slit, a groove, or a non-fiber-stacking portion may be provided in a part of the high grammage portion 43. Since the high grammage portion 43 has slits or the like, the portion where the slits or the like are formed can be set to a rough standard of the portion to which the waste tape 10 is fixed. The slits, grooves, or non-fiber-stacking portions preferably extend in the longitudinal direction X of the high grammage portion 43.

In the above embodiment, the tab piece 21 is joined to the other end of the fastening section piece 19, but the disposal tape 10 may not have the tab piece 21.

The absorbent article of the present invention may be a pants-type sanitary napkin or the like, in addition to pants-type disposable diapers for infants and adults.

The disposal tape for absorbent articles of the present invention may be in the form shown in fig. 8. In the disposal tape 10 in the three-folded state shown in fig. 8, the fastening portion 18 has a portion E1 extending from the extension portion 15. In addition, extension 15 has a portion E2 extending away from anchor portion 12. A part of the extension E2 of the extension 15 contacts the non-skin-facing surface of the diaper 1, more specifically, the non-skin-facing surface of the outer sheet 55. A part of the extension E2 of the extension 15 may be fixed to the non-skin-facing surface of the diaper 1 or may not be fixed to the non-skin-facing surface of the diaper 1. Further, the fixing portion 12 has a portion E3 extending away from the extension portion E1 of the stationary portion 18.

The utility model discloses the attached notes below further.

<1>

An absorbent article comprising a liquid-permeable topsheet, a leakage-preventing sheet, and an absorbent body positioned between the topsheet and the leakage-preventing sheet, and having a longitudinal direction corresponding to the front-rear direction of a wearer and a width direction orthogonal to the longitudinal direction, the absorbent article having a ventral portion disposed on the ventral side of the wearer when worn, a dorsal portion disposed on the back side of the wearer, and a crotch portion positioned between the ventral portion and the dorsal portion,

the absorbent body has: a high grammage portion located at a center portion in the width direction and extending in the longitudinal direction; side low grammage portions which are located on both sides of the high grammage portion in the width direction and are lower in grammage than the high grammage portion; and a back-side low grammage portion which is located outside the longitudinal end edge of the high grammage portion in the back-side portion and has a lower grammage than the high grammage portion,

a disposal tape is provided on the non-skin-facing surface of the absorbent article,

the fixing portion, the extending portion, and the fastening portion of the disposal tape fixed to the non-skin-facing surface of the absorbent article are sequentially arranged along the longitudinal direction of the disposal tape and are formed in a three-folded state in this order,

in the waste tape in the three-folded state, the fixing portion and the extension portion are detachably joined to each other, and the extension portion and the fixing portion are also detachably joined to each other, and the extension portion is extensible in the longitudinal direction of the waste tape in the unfolded state where the three-folded state is released,

the disposal tape in the three-folded state is disposed along the longitudinal direction of the absorbent article in a width range of the high grammage portion in the back side portion, and at least a part of the disposal tape is located in the back side low grammage portion.

<2>

The absorbent article according to the above <1>, wherein the absorbent member has an absorbent core and a core-spun sheet, the absorbent core contains a water-absorbent polymer and a hydrophilic fiber, and the core-spun sheet wraps the absorbent core,

the ratio of the mass of the hydrophilic fiber on the non-skin-facing surface side of the absorbent core in the high grammage portion to the total mass of the water-absorbent polymer and the hydrophilic fiber is higher than that on the skin-facing surface side of the absorbent core in the high grammage portion.

<3>

The absorbent article according to the above <2>, wherein the mass ratio of the hydrophilic fiber to the total mass of the water-absorbent polymer and the hydrophilic fiber on the non-skin-facing surface side of the absorbent core in the high grammage part is 50 mass% or more and 100 mass% or less, and preferably 60 mass% or more and 99 mass% or less.

<4>

The absorbent article according to the above <2> or <3>, wherein the mass ratio of the hydrophilic fiber is 10 mass% or more and 70 mass% or less, preferably 15 mass% or more and 60 mass% or less, with respect to the total mass of the water-absorbent polymer and the hydrophilic fiber on the skin-facing surface side of the absorbent core in the high grammage portion.

<5>

The absorbent article according to any one of the above <1> to <4>, wherein the absorbent body has an absorbent core containing a water-absorbent polymer and a hydrophilic fiber, and a core-spun sheet covering the absorbent core,

the core sheet has an overlapping portion where the core sheets are overlapped with each other on the non-skin-facing surface side of the absorbent core,

at least a part of the overlapping portion overlaps with the high grammage portion in a plan view of the absorbent article.

<6>

The absorbent article according to the above <5>, wherein the maximum length in the width direction of the overlapping portion in the back-side portion is 20% to 90%, preferably 30% to 80%, of the maximum length in the width direction of the high grammage portion in the back-side portion.

<7>

The absorbent article according to the above <5> or <6>, wherein a part of the waste tape overlaps the overlapping portion in a plan view of the absorbent article.

<8>

The absorbent article according to any one of the above <5> to <7>, wherein a length of the waste tape in the width direction is shorter than a maximum length of the overlapping portion in the width direction.

<9>

The absorbent article according to the above <8>, wherein a ratio of the length of the waste tape in the width direction to the maximum length of the overlapping portion in the width direction is 0.2 or more and 0.9 or less, preferably 0.3 or more and 0.8 or less.

<10>

The absorbent article according to any one of the above <1> to <9>, wherein an elastic member capable of contracting in the longitudinal direction is disposed in a portion overlapping with the absorbent body in a plan view of the absorbent article,

the elastic member is located outside both side edges of the high grammage portion in the width direction.

<11>

The absorbent article according to any one of the above <1> to <10>, wherein the absorbent article has a first pattern portion having a pattern visually recognizable from the outside at a position overlapping the high grammage portion in a plan view of the absorbent article, and has a second pattern portion having a pattern visually recognizable from the outside at a position overlapping the side low grammage portion,

the first pattern part and the second pattern part are different in color tone.

<12>

The absorbent article according to any one of the above <1> to <11>, wherein the absorbent article has a first pattern portion having a pattern visually recognizable from the outside at a position overlapping the high grammage portion in a plan view of the absorbent article, and has a second pattern portion having a pattern visually recognizable from the outside at a position overlapping the side low grammage portion,

the first pattern part and the second pattern part have different area occupancy rates of the patterns.

<13>

The absorbent article according to any one of the above <1> to <12>, wherein a pattern that is visually recognizable from the outside is provided at a position overlapping the high grammage portion in a plan view of the absorbent article, and the pattern includes a vertically long pattern having a length in the longitudinal direction longer than a length in the width direction, or a pattern group that includes a main pattern and a companion pattern disposed therearound and has a length in the longitudinal direction longer than a length in the width direction.

<14>

The absorbent article according to any one of the above <1> to <13>, wherein a pattern that is visually recognizable from the outside at a position overlapping the high grammage portion in a plan view of the absorbent article includes a pattern that changes color due to excrement and functions as an indicator, and a length of the pattern in the longitudinal direction that functions as an indicator is longer than a developed length of the disposal tape in the longitudinal direction in a non-extended state in which the three-fold state is released and is shorter than a developed length of the disposal tape in the longitudinal direction in a extended state in which the three-fold state is released.

<15>

The absorbent article according to the above <14>, wherein the pattern that functions as the indicator is formed of one or more substantially linear portions extending in the longitudinal direction, and the length of the pattern in the width direction is smaller than the width of the elongated portion of the disposal tape elongated by 100% in the longitudinal direction.

<16>

The absorbent article according to any one of the above <1> to <15>, wherein an elastic member that is contractible in the width direction is disposed at a position overlapping the lateral low grammage portion in a plan view of the absorbent body.

<17>

The absorbent article according to any one of the above <1> to <16>, wherein the absorbent article includes: an absorbent body having the leakproof sheet and the absorber; and an outer covering body disposed on the non-skin-facing surface side of the absorbent main body,

the absorbent article has a portion where the absorbent main body and the exterior body are not joined at a position overlapping the side low grammage portion in a plan view of the absorbent article.

<18>

The absorbent article according to any one of the above <1> to <17>, wherein the absorbent body has a bend-inducing portion disposed at a position corresponding to a widthwise side edge of the high-basis weight portion.

<19>

The absorbent article according to the above <18>, wherein the length of the bending guide portion in the longitudinal direction is longer than the length of the waste tape in the longitudinal direction in the non-extended state in which the three-fold state is released, and is shorter than the length of the waste tape in the longitudinal direction in the extended state in which the three-fold state is released.

<20>

The absorbent article according to the above <18> or <19>, wherein the absorbent body has an absorbent core containing a water-absorbent polymer and a hydrophilic fiber,

the bending induction part is a slit, a groove or a non-fiber-stacking part arranged on the absorbent core.

<21>

The absorbent article according to any one of the above <1> to <20>, wherein the absorbent article includes: an absorbent body having the topsheet, the leakage preventive sheet, and the absorber; and an outer covering body disposed on the non-skin-facing surface side of the absorbent main body,

the outer package has an outer sheet, an inner sheet disposed on the skin-facing surface side of the outer sheet, and a plurality of elastic members disposed between the outer sheet and the inner sheet,

and has a waist stretchable region formed at a position further outward in the longitudinal direction than the absorbent main body, and a lower stretchable region formed in a region overlapping with the absorbent main body in the longitudinal direction in a region further toward the crotch side than the waist stretchable region,

the lower stretchable region has a higher stretchable stress than the waist stretchable region.

<22>

The absorbent article according to the above <21>, wherein a ratio of the extension and contraction stress in the lower extensible region to the extension and contraction stress in the waist extensible region is 105% or more and 300% or less, preferably 110% or more and 250% or less.

<23>

The absorbent article according to the above <21> or <22>, wherein the back-side lower stretchable region has a lower stretching stress than the abdominal-side lower stretchable region with respect to the stretching stress of the lower stretchable region.

<24>

The absorbent article according to any one of the above <1> to <23>, wherein a slit, a groove, or a non-fiber-stacking portion extending in the longitudinal direction is provided in a part of the high grammage portion.

Industrial applicability

According to the present invention, when the absorbent article is rolled into the waste form, the waste tape can be easily fixed to the absorbent article rolled into the roll at a suitable position.

Claims (24)

1. An absorbent article including a liquid-permeable front sheet, a leakage-preventing sheet, and an absorber positioned between the front sheet and the leakage-preventing sheet, and having a longitudinal direction corresponding to a front-rear direction of a wearer and a width direction orthogonal to the longitudinal direction, the absorbent article having a stomach-side portion disposed on a stomach-side of the wearer when worn, a back-side portion disposed on a back-side of the wearer, and a crotch portion positioned between the stomach-side portion and the back-side portion, the absorbent article being characterized in that:

the absorbent body has: a high grammage portion located at a center portion in the width direction and extending in the longitudinal direction; side low grammage portions which are located on both sides of the high grammage portion in the width direction and are lower in grammage than the high grammage portion; and a back-side low grammage portion which is located on an outer side of a longitudinal end edge of the high grammage portion in the back-side portion and has a lower grammage than the high grammage portion,

a disposal tape is provided on the non-skin-facing surface of the absorbent article,

the fixing portion, the extension portion, and the fastening portion of the disposal tape fixed to the non-skin-facing surface of the absorbent article are sequentially arranged along the longitudinal direction of the disposal tape, and are formed in a three-folded state in which the fixing portion, the extension portion, and the fastening portion are laminated in this order,

in the waste tape in the three-folded state, the fastening portion and the extension portion are detachably joined to each other, and the extension portion and the fixing portion are also detachably joined to each other, and the extension portion is extensible in the longitudinal direction of the waste tape in the unfolded state in which the three-folded state is released,

the disposal tape in the three-folded state is disposed along the longitudinal direction of the absorbent article in a width range of the high grammage portion in the back side portion, and at least a part of the disposal tape is located in the back side low grammage portion.

2. The absorbent article of claim 1, wherein:

the absorbent body has an absorbent core containing an absorbent polymer and a hydrophilic fiber, and a core-spun sheet that wraps the absorbent core,

the ratio of the mass of the hydrophilic fiber on the non-skin-facing surface side of the absorbent core in the high grammage section to the total mass of the water-absorbent polymer and the hydrophilic fiber is higher than that on the skin-facing surface side of the absorbent core in the high grammage section.

3. The absorbent article of claim 2, wherein:

the mass ratio of the hydrophilic fiber to the total mass of the water-absorbent polymer and the hydrophilic fiber on the non-skin-facing surface side of the absorbent core in the high grammage portion is 50 mass% or more and 100 mass% or less.

4. The absorbent article of claim 2, wherein:

the mass ratio of the hydrophilic fiber to the total mass of the water-absorbent polymer and the hydrophilic fiber on the skin-facing surface side of the absorbent core in the high grammage portion is 10 mass% or more and 70 mass% or less.

5. The absorbent article of claim 1, wherein:

the absorbent has an absorbent core containing a water-absorbent polymer and a hydrophilic fiber, and a core-spun sheet for wrapping the absorbent core,

the core-wrapped sheet has an overlapping portion where the core-wrapped sheets are overlapped with each other on the non-skin-facing surface side of the absorbent core,

at least a part of the overlapping portion overlaps with the high grammage portion in a plan view of the absorbent article.

6. The absorbent article of claim 5, wherein:

the maximum length in the width direction of the overlapping portion in the back-side portion is 20% or more and 90% or less of the maximum length in the width direction of the high grammage portion in the back-side portion.

7. The absorbent article of claim 5, wherein:

a part of the disposal tape overlaps the overlapping portion in a plan view of the absorbent article.

8. The absorbent article of claim 5, wherein:

the length of the disposal tape in the width direction is shorter than the maximum length of the overlapping portion in the width direction.

9. The absorbent article of claim 8, wherein:

the ratio of the length of the disposal tape in the width direction to the maximum length of the overlapping portion in the width direction is 0.2 to 0.9.

10. The absorbent article of claim 1, wherein:

an elastic member that is contractible in the longitudinal direction is disposed in a portion overlapping the absorbent body when the absorbent article is viewed in plan view,

the elastic member is located on the outer side of both side edges of the high grammage portion in the width direction.

11. The absorbent article of claim 1, wherein:

a first pattern portion having a pattern visually recognizable from the outside at a position overlapping the high grammage portion in a plan view of the absorbent article, and a second pattern portion having a pattern visually recognizable from the outside at a position overlapping the side low grammage portion,

the first pattern portion and the second pattern portion have different patterns in color tone.

12. The absorbent article of claim 1, wherein:

a first pattern portion having a pattern visually recognizable from the outside at a position overlapping the high grammage portion in a plan view of the absorbent article, and a second pattern portion having a pattern visually recognizable from the outside at a position overlapping the side low grammage portion,

the area occupancy of the pattern of the first pattern portion and the pattern of the second pattern portion are different.

13. The absorbent article of claim 1, wherein:

the absorbent article has a pattern visually recognizable from the outside at a position overlapping the high grammage portion in a plan view, the pattern including a vertically long pattern having a length in the longitudinal direction longer than a length in the width direction, or a pattern group including a main pattern and a companion pattern arranged around the main pattern and having a length in the longitudinal direction longer than a length in the width direction.

14. The absorbent article of claim 1, wherein:

the absorbent article has a pattern that is visually recognizable from the outside at a position overlapping the high grammage portion when viewed in plan view, the pattern including a pattern that changes color due to excrement and functions as an indicator mark, and a length of the pattern in the longitudinal direction that functions as an indicator mark is longer than a length of the disposal tape in the longitudinal direction in the unfolded state in which the three-fold state is released and in the non-extended state, and is shorter than a length of the disposal tape in the longitudinal direction in the unfolded state in which the three-fold state is released and in the extended state.

15. The absorbent article of claim 14, wherein:

the pattern functioning as the indicator mark is formed of one or more substantially linear portions extending in the longitudinal direction, and the length of the pattern in the width direction is smaller than the width of the elongated portion of the disposal tape elongated by 100% in the longitudinal direction.

16. The absorbent article of claim 1, wherein:

an elastic member that can contract in the width direction is disposed at a position overlapping the lateral low grammage portion when the absorbent body is viewed in plan.

17. The absorbent article of claim 1, wherein:

the absorbent article includes: an absorbent main body having the leakage preventive sheet and the absorber; and an outer covering body disposed on the non-skin-facing surface side of the absorbent main body,

the absorbent article has a portion where the absorbent main body and the exterior body are not joined at a position overlapping the side low grammage portion in a plan view of the absorbent article.

18. The absorbent article of claim 1, wherein:

the absorbent body is provided with a bending induction portion at a position corresponding to a side edge in the width direction of the high grammage portion.

19. The absorbent article of claim 18, wherein:

the length of the bending guide portion in the longitudinal direction is longer than the length of the waste tape in the longitudinal direction in the unfolded state in which the three-fold state is released and in the non-extended state, and is shorter than the length of the waste tape in the longitudinal direction in the unfolded state in which the three-fold state is released and in the extended state.

20. The absorbent article of claim 18, wherein:

the absorbent body has an absorbent core containing a water-absorbent polymer and a hydrophilic fiber,

the bending induction part is a slit, a groove or a non-fiber-stacking part arranged on the absorbent core.

21. The absorbent article of claim 1, wherein:

the absorbent article includes: an absorbent main body having the front sheet, the leakage preventing sheet, and the absorber; and an outer covering body disposed on the non-skin-facing surface side of the absorbent main body,

the outer cover has an outer sheet, an inner sheet disposed on the skin-facing surface side of the outer sheet, and a plurality of elastic members disposed between the outer sheet and the inner sheet, and has a waist stretch region formed at a position further outward in the longitudinal direction than the absorbent main body, and a lower stretch region formed in a region overlapping the absorbent main body in the longitudinal direction in a region further toward the crotch side than the waist stretch region,

the telescopic stress of the lower telescopic area is greater than that of the waist telescopic area.

22. The absorbent article of claim 21, wherein:

the ratio of the extension/contraction stress in the lower extension/contraction region to the extension/contraction stress in the waist extension/contraction region is 105% to 300%.

23. The absorbent article of claim 21, wherein:

among the extension and contraction stresses in the lower extension and contraction region, the extension and contraction stress in the lower extension and contraction region on the back side is lower than the extension and contraction stress in the lower extension and contraction region on the abdominal side.

24. The absorbent article of claim 1, wherein:

a slit, a groove, or a non-fiber-stacking portion extending in the longitudinal direction is provided in a part of the high grammage portion.

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