TWI635853B - Absorbent article - Google Patents

Abstract

An absorbent body provided to absorb urine in a longitudinal direction; a ventral side belt member disposed along a lateral direction intersecting the longitudinal direction and superposed on one end portion of the lateral direction of the absorbent body to be fixed; The back side belt member is formed as a different member from the front side belt member and is provided in the lateral direction and is fixed to the other end portion of the longitudinal direction of the absorbent body. An absorbent article having a waist opening and two leg-openings is formed by joining the lateral end portions of the front side belt members and the lateral end portions of the back side belt members. The longitudinal direction of the overlapping portion in which the absorbent body is superposed in the front side belt member is made larger than the longitudinal direction of the overlapping portion of the back side belt member in which the absorbent body is superposed. The ventral side belt member is required to impart a lateral contraction force to the ventral side belt member, and has a ventral continuous elastic member that is continuously disposed from one end portion of the ventral side belt member to the other end portion, and is discontinuous in the lateral direction. A ventral discontinuous elastic member that is configured. The back side belt member is required to impart a lateral contraction force to the back side belt member, and has a back side continuous elastic member that is continuously disposed from one end portion of the back side belt member to the other end portion, and is discontinuous in the lateral direction. A backside discontinuous elastic member that is configured to be ground. The sum of the magnitudes of the contraction forces of the back side continuous elastic members of the back side belt members is greater than the sum of the magnitudes of the contraction forces of the ventral side continuous elastic members of the abdominal side belt members.

Description

Absorbent article

The present invention relates to a urine absorbing absorbent article such as a disposable diaper.

Conventionally, a three-part disposable diaper 1 of the type described in Patent Document 1 has been used as an absorbent article for absorbing urine. 1A is a schematic perspective view of the diaper 1 in a worn state, and FIG. 1B is a schematic plan view showing the diaper 1 after being cut off from the portion 1s and 1s that abuts the side of the wearer, and is viewed from the non-skin side. The 3-part diaper 1 is roughly divided into three parts. In other words, the diaper 1 has an absorbent body 10 that abuts the user's crotch portion to absorb urine, and the second member has a ventral side that covers the wearer's abdominal portion. The belt member 30a has a back side belt member 30b covering the back side of the wearer in the third part. Further, the front side belt member 30a and the back side belt member 30b are arranged in a substantially parallel arrangement with each other spaced apart from each other, and the absorbent body 10 is laid between the same, and the longitudinal direction of the absorbent body 10 is Each of the end portions 10ea, 10eb is fixed to each of the corresponding closest belt members 30a, 30b, whereby the appearance of the diaper 1 in the unfolded state is formed in a plan view Slightly H-shaped shape.

The absorptive core 10 is an absorbent core 11 having a liquid absorbing material such as laminated pulp fibers; a liquid permeable surface sheet member 13 provided by covering the core 11 from the skin side; and a non-skin side The liquid-impermeable back sheet member 15 is provided to cover the core 11. Further, the longitudinal direction of the absorbent body 10 is along the longitudinal direction of the diaper 1, and the respective belt members 30a and 30b are arranged to extend in the lateral direction orthogonal to the longitudinal direction. Moreover, the direction orthogonal to both the longitudinal direction and the lateral direction (the direction which penetrates the paper surface in FIG. 1B) becomes the thickness direction of the diaper 1.

On the other hand, in the respective belt members 30a, 30b, a plurality of elastic members 35s1, 35s2, ... such as silk rubber are joined and fixed in the direction in the lateral direction, whereby the belt members 30a, 30b are laterally provided. Contraction force. Further, the portions 30ac and 30bc to which the end portions 10ea and 10eb of the absorbent main body 10 are fixed to the belt members 30a and 30b are the central portions 30ac and 30bc which are lateral directions.

[prior technical literature] [Patent Document]

[Patent Document 1] Japanese Special Table 2006-525858

Here, when the contraction force as described above is applied to the central portions 30ac and 30bc as described above, the portion of the absorbent body 10 where the absorbent core 11 exists is contracted in the lateral direction to cause wrinkles. Moreover, when such wrinkles are generated, the absorbent body The surface area of the skin of 10 is reduced in contact with the skin of the wearer, and the absorption of urine is lowered or the wrinkles are formed from the absorbent body 10 to easily leak urine. Therefore, the elastic members 35s2, 35s2, ... which transversely traverse the absorbent core 11 in the plurality of elastic members 35s1, 35s2, ... disposed in the belt members 30a, 30b are by the absorbent core 11 The position is divided, and as shown in FIG. 1B, a state in which the elastic member that traverses the absorbent core 11 is not present, or an elastic member (not shown) that cuts the absorbent core 11 in a fine cut is formed, whereby The contraction force generated at the belt members 30a, 30b at the portions 30ac, 30bc corresponding to the absorbent core 11 is lowered.

That is, as described above, in the belt members 30a and 30b, it is necessary to partially reduce the lateral contraction force.

On the other hand, from the viewpoint of good urine absorbability, it is conceivable that the absorbent body 10 is disposed more inclined to the front side belt member 30a than the back side belt member 30b. Further, since the ventral side is relatively larger than the back side as the absorption possible capacity, the absorbent body 10 can quickly and surely absorb the urine which is generally discharged on the ventral side without insufficiently.

However, in such a configuration, as shown in FIG. 1C, since the ventral portion 10a of the absorbent body 10 absorbs urine at a higher rate, the ventral portion 10a becomes heavier after absorption of urine, and further Contribute to the care that this part 10a hangs down. Further, when it is drung greatly, a large gap is generated between the absorbent body 10 and the crotch portion, and as a result, urine may leak from the diaper 1.

The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a part of the front side belt member and the back side belt member. The contraction force is reduced, and the absorption of urine in the absorbent body is improved, and the portion on the ventral side of the absorbent body after absorbing urine is further suppressed from falling down.

The main invention for achieving the above object is an absorbent article comprising: an absorbent body provided to absorb urine in a longitudinal direction; and a ventral side belt member disposed along a lateral direction intersecting the longitudinal direction, And being fixed to the one end portion of the aforementioned lateral direction of the absorbent body; and a back side belt member which is formed as a different member from the front side belt member and which is disposed along the lateral direction and superposed on the absorbent The other end portion of the longitudinal direction of the main body is fixed, and a waist opening is formed by joining each of the lateral end portions of the front side belt member and the lateral end portions of the back side belt member. An absorbent article having two leg openings, wherein the longitudinal dimension of the overlapping portion of the front side belt member in which the absorbent body is superposed is formed to be overlapped with the back side belt member. The aforementioned longitudinal direction of the overlapping portion of the absorbent body is larger, and the aforementioned front side belt member is required to impart the aforementioned lateral contraction force to the aforementioned front side belt member, and has the above-described abdominal side belt member. The one end portion of the lateral direction spans to the other end portion and the abdominal continuous elastic member that is continuously disposed, and the abdominal side discontinuous elastic member that is discontinuously disposed in the lateral direction, the back side belt member is necessary to the aforementioned back side belt Member gives the aforementioned a lateral contraction force having a back side continuous elastic member continuously disposed from the one end portion of the back side belt member to the other end portion, and a back side discontinuous elastic shape that is discontinuously disposed in the lateral direction The member, the sum of the magnitudes of the contraction forces of the aforementioned back side continuous elastic members of the aforementioned back side belt members is larger than the sum of the magnitudes of the contraction forces of the aforementioned front side continuous elastic members of the aforementioned front side belt members.

Other features of the present invention will become apparent from the description and appended claims.

According to the present invention, both the ventral side belt member and the back side belt member can partially reduce the contraction force, and the urine absorption of the absorbent body can be made good, thereby further suppressing the absorption of the urine of the absorbent body after the urine. The weight of the side portion causes the portion of the ventral side to hang down.

1‧‧‧ diapers (absorbent articles)

1HB‧‧‧waist opening

1HL‧‧‧ leg opening

1s‧‧‧section

10‧‧‧Absorbable ontology

10a‧‧‧ ventral part

10b‧‧‧The back side part

10ea‧‧‧ end

10eb‧‧‧End

10es‧‧‧ end

10ew‧‧‧ end

Section 10f‧‧‧

10n‧‧‧section

10p‧‧‧section

11‧‧‧Absorbent core

11a‧‧‧ ventral part

11ew‧‧‧End

13‧‧‧Surface sheet member

15‧‧‧Inside sheet member

15a‧‧‧ leakproof sheet

15b‧‧‧Outer sheet

15bf‧‧‧ protruding part

15bg‧‧‧The part that was folded back

17‧‧‧Flexible components

18‧‧‧Flexible components

30a‧‧‧ Ventral belt members

30ac‧‧‧Central Department

30ac2‧‧‧ part

30ae‧‧‧End

30ae2‧‧‧End

30aee‧‧‧ edge

30ap‧‧‧Folding Department

30aw‧‧‧ highlight

30b‧‧‧Back side belt members

30be‧‧‧ end

30bee‧‧‧ edge

30bf‧‧‧Hip cover (excess)

30bp‧‧ ‧ overlap

30bw‧‧‧ highlight

31‧‧‧ Non-woven (sheet-like members)

31f‧‧‧ protruding parts

31g‧‧‧The part that was folded back

32‧‧‧ Non-woven (sheet member)

35‧‧‧Flexible components

35U‧‧‧elastic components

35M‧‧‧elastic components

35D‧‧‧elastic components

35a‧‧‧ Ventral continuous elastic members

35b‧‧‧Back side continuous elastic member

35na‧‧‧ Ventral discontinuous elastic member

35nb‧‧‧Back side discontinuous elastic member

35p‧‧‧elastic components

35wa‧‧‧Side elastic members

35wae‧‧‧ end

35wb‧‧‧ side elastic members

35wbe‧‧‧ end

AU‧‧‧ upper area

AM‧‧‧Central Region

AD‧‧‧ lower area

AMc‧‧‧Central Department

AMw‧‧‧ highlight

ADc‧‧‧ Central Department

ADw‧‧‧ Highlights

LG‧‧‧ leg hem

LSG‧‧‧Three-dimensional folding

LSGb‧‧‧ base end

LSGf‧‧‧ free end part

J‧‧‧ joint

C1‧‧‧Central location

1A is a schematic perspective view showing an example of a three-part type diaper 1 for the subject of the present invention.

1B is a schematic plan view showing the diaper 1 being unwound from the non-skin side after the portion 1s and 1s of the flank of the wearer are cut off.

FIG. 1C is a schematic view showing a state in which the diaper 1 is worn by an infant as a wearer.

Fig. 2 is a schematic perspective view of the disposable diaper 1 of the three-part type according to the embodiment.

Fig. 3 is a schematic plan view showing the state in which the diaper 1 is unfolded as seen from the skin side.

Fig. 4 is a schematic perspective view of the diaper viewed from a non-skin side.

Fig. 5A is a cross-sectional view taken along line A-A and a cross-sectional view taken along line C-C in Fig. 3, and Fig. 5B is a cross-sectional view taken along line B-B in Fig. 8.

Fig. 6 is a cross-sectional view taken along line VI-VI of Fig. 3.

FIG. 7 is a schematic view showing a state in which the diaper 1 is worn by an infant as a wearer.

FIG. 8A is a schematic enlarged view of the front side belt member 30a when viewed from the non-skin side of the diaper 1.

FIG. 8B is a schematic enlarged view of the front side belt member 30a when viewed from the non-skin side of the diaper 1.

FIG. 9 is a schematic enlarged view of the back side belt member 30b when viewed from the non-skin side of the diaper 1.

FIG. 10 is a schematic view showing a connection state between the front side belt member 30a and the back side belt member 30b.

FIG. 11 is a schematic enlarged view of the front side belt member 30a when viewed from the non-skin side of the diaper 1.

FIG. 12 is a schematic plan view of the abdominal belt member 30a of another example of the elastic member 35na in which the lower portion AD is discontinuously disposed, and is a view showing a state in which the non-skin side non-woven fabric 31 in the belt member 30a is removed. .

At least the following items can be understood based on the description of this manual and the drawings.

An absorbent article comprising: an absorbent body disposed to absorb urine in a longitudinal direction; a ventral side belt member disposed along a lateral direction intersecting the longitudinal direction and superposed on the absorbent body a one end portion of the lateral direction is fixed; and a back side belt member which is formed as a different member from the front side belt member and which is provided along the lateral direction and which is superposed on the other end portion of the longitudinal direction of the absorbent body Being fixed, and forming a waist opening and an absorption of the two leg openings by joining the respective end portions of the lateral side belt member and the lateral end portions of the back side belt member An article characterized in that: the longitudinal direction of the overlapping portion of the front side belt member in which the absorbent body is superposed is a size in which the overlapping portion of the absorbent body is superposed on the back side belt member The aforementioned longitudinal direction is larger in size, and the aforementioned front side belt member is required to impart the aforementioned lateral contraction force to the aforementioned front side belt member, and has the aforementioned lateral end portion from the aforementioned front side belt member to the other end. a ventral continuous elastic member that is continuously disposed, and a ventral discontinuous elastic member that is discontinuously disposed in the lateral direction, the back side belt member is required to impart the aforementioned lateral contraction force to the back side belt member, and has a back side continuous elastic member continuously disposed from the one end portion of the front side belt member to the other end portion, and a back side discontinuous elastic member disposed discontinuously in the lateral direction, the back side belt member The sum of the magnitudes of the contraction forces of the aforementioned back side continuous elastic members is larger than that of the aforementioned ventral side continuous elastic members of the aforementioned abdominal side belt members The sum of the contraction forces is greater.

According to such an absorbent article, since the front side belt member has the front side discontinuous elastic member that is discontinuously disposed in the lateral direction, the lateral contraction force imparted to the abdominal side belt member can be partially alleviated. Also since the back side belt member also has the back side discontinuous elastic member that is discontinuously disposed in the lateral direction, the lateral contraction force imparted to the back side belt member can be partially alleviated.

Further, the longitudinal direction of the overlapping portion of the belt member as the portion in which the absorbent body is superposed is such that the abdominal belt member is larger than the back side belt member. Moreover, by this the absorbent body as a whole is arranged offset from the front side belt member by the front side belt member.

Therefore, the absorbent body is a urine that can be absorbed mainly on the ventral side with a rapid and sufficient liquid absorbing capacity.

Furthermore, the sum of the contraction forces of the back side continuous elastic members of the back side belt members is set to be larger than the sum of the contraction forces of the abdominal side continuous elastic members of the belly side belt members. Therefore, as described above, it is possible to suppress the phenomenon that the absorbent body is more biased than the back side belt member after the absorption of the urine when the front side belt member is disposed, that is, the belly of the absorbent body after absorption of the urine can be suppressed. The weight of the side portion causes the hanging phenomenon. In detail, in the wearing state of the absorbent article, the contraction force of the continuous elastic member on the back side due to the sum is applied to the ventral side of the absorbent body via the ventral side belt member as a pulling force toward the back side. Thus, the ventral portion is pulled up on the dorsal side (eg, obliquely upward). Therefore, it is possible to suppress the fact that the ventral portion of the absorbent body after absorbing urine hangs down.

In the absorbent article, the front side belt member is provided with the overlapping portion in the lateral center portion of the front side belt member, and has a larger side than the overlapping portion on both sides in the lateral direction. In the protruding portion that protrudes in the lateral direction, the front side discontinuous elastic member has a side elastic member that is continuously provided in the lateral direction in one of the protruding portions; and the protruding portion in the other side is continuous in the lateral direction And a side elastic member provided at a distance between the side elastic members of the protruding portion and the side portion of the one of the protruding portions in the lateral direction, wherein the back side belt member is by the back side belt The central portion of the member in the lateral direction defines the overlapping portion, and has a protruding portion that protrudes laterally from the overlapping portion on both sides in the lateral direction, and the back side discontinuous elastic member has: The aforementioned protruding portion is provided in the laterally continuous side elastic members; and the other protruding portion is continuously continuous in the lateral direction, a side elastic member provided at a distance between the side elastic members of the protruding portion and the side portion of the one of the protruding portions, and the side elastic member of the protruding portion of the front side belt member. The sum of the contraction forces is desirably larger than the sum of the contraction forces of the aforementioned side elastic members of the aforementioned protruding portion of the aforementioned back side belt member.

According to such an absorbent article, in each of the front side belt member and the back side belt member, each of the central portions in the lateral direction in which the overlapping portions of the absorbent body are provided is a corresponding elastic member in the discontinuous elastic member. The portion that exists, that is, the central portion, is in a state in which the elastic member is not present. and Further, by this, the application of the contraction force of the overlapping portion as the central portion can be alleviated. Therefore, the contraction force of the elastic member is effectively prevented in the case where the absorbent body wrinkles are generated, and the skin side surface of the absorbent body can be maintained substantially flatly, and as a result, the liquid absorption of the absorbent body can be prevented.

Further, the sum of the contraction forces of the side elastic members of the protruding portions of the front side belt members is desirably larger than the sum of the contraction forces of the side elastic members of the protruding portions of the back side belt members. Therefore, it is possible to pull up the portion on the ventral side from the side of the back side of the absorbent body with greater force from both sides in the lateral direction. Therefore, the ventral portion of the absorbent body is rapidly enlarged in the lateral direction, so that the skin side surface is likely to be substantially flat. Further, by this, the area on the ventral side of the discharged urine and the skin can be increased, and as a result, the absorbability of urine can be improved.

In the absorbent article, the side elastic member disposed in the protruding portion of the front side belt member is elongated on the center side in the lateral direction, and the end portion of the extended portion is joined to the absorbent The aforementioned lateral ends of the body are desirable.

According to such an absorbent article, the side elastic member disposed in the protruding portion of the front side belt member is extended to the end portion of the lateral direction of the absorbent body, and is joined to the end portion. Therefore, the portion on the ventral side of the absorbent body can surely impart the contracting force of the side elastic members from both sides in the lateral direction. Therefore, it is possible to surely pull the ventral portion of the absorbent body toward both sides in the lateral direction, and it is possible to surely make the skin side surface of the ventral portion substantially flat.

In the absorbent article, the absorbent body has an absorbent core in which a liquid absorbing material is laminated, and a liquid permeable surface sheet member that covers the absorbent core from the skin side; a liquid-impermeable back sheet member provided on the non-skin side of the absorbent core, wherein the end portion of the side elastic member of the front side belt member is located at an end portion of the absorbent core at the lateral direction Expectation.

According to such an absorbent article, the end portion of the side elastic member of the front side belt member is located at the lateral end portion of the absorbent core. Therefore, it is possible to surely transmit the contraction force of the above-described side elastic member to the ventral portion of the absorbent core which becomes the main portion of the absorbent body, whereby the lateral contraction force can be surely pulled by the large contraction force The ventral portion of the core. As a result, the skin side surface of the ventral portion of the absorbent body can be made substantially flat, and the urine absorbability can be further improved.

In the absorbent article, the absorbent body has an absorbent core in which a liquid absorbing material is laminated, and a liquid permeable surface sheet member that covers the absorbent core from the skin side; The liquid-impermeable back sheet member provided on the non-skin side covering the absorbent core, the side elastic member disposed in the protruding portion of the back side belt member is elongated on the center side in the lateral direction, and The end portion of the extended portion is desirably a portion that is fixed to the end portion in the lateral direction of the absorbent core in the absorbent body. According to such an absorbent article, the end of the side elastic member of the back side belt member is in the absorbent core The portion that is fixed at the end portion that is more lateral than the absorbent core. Therefore, the contraction force of the side elastic member described above is less likely to be transmitted to the absorbent core which becomes the main portion of the absorbent body, whereby the portion on the back side of the absorbent body is allowed to be separated from the buttocks of the wearer. status. Thereby, it is easy to form a space between the wearer's buttocks and the surface sheet member to accommodate the discharged feces after the wearer's excretion.

In the absorbent article according to the aspect of the invention, the end portion of the absorbent body in the lateral direction is fixed to the front side belt member via a joint portion, and a contraction force of the side elastic member of the protruding portion passes through the joint portion. Acting on the aforementioned end portion, the end portion is drawn toward the protruding portion as desired.

According to such an absorbent article, the respective lateral ends of the absorbent body are pulled toward the abdominal side belt member by the large contraction force of the side elastic members of the protruding portion of the abdominal side belt member. Further, by this, a state in which the ventral portion of the absorbent body is pulled up is formed, and as a result, it is possible to suppress the drooping of the portion on the ventral side where the urine is heavier.

In the absorbent article, the back side belt member has a larger longitudinal dimension than the front side belt member than the front side belt member, and has a larger orientation than the front side belt member. An excess portion of the leg-opening opening, a side elastic member located at a position closest to the leg-opening of the plurality of the side elastic members of the protruding portion of the front side belt member It is desirable that the contraction force of the side elastic member which is the position closest to the aforementioned leg-opening of the plurality of the aforementioned side elastic members located in the aforementioned protruding portion of the aforementioned back side belt member is larger.

According to such an absorbent article, the contraction force of the side elastic member closest to the position of the leg-opening in the plurality of side elastic members of the front side belt member is higher than the plurality of side elastic members of the back side belt member The side elastic member closest to the position of the leg opening is more contracted. Therefore, the above-mentioned excess portion of the back side belt member functioning as the buttocks cover member is rapidly pulled toward the ventral side by the contraction force of the side elastic member of the abdominal side belt member, and the excess portion can be quickly enlarged toward the ventral side. Therefore, the excess portion can be effectively used as a buttock cover member.

The absorbent article, wherein a plurality of the back side continuous elastic members have a contracting force of the back side continuous elastic member at a position closest to the leg circumference opening to the longitudinal position, and a plurality of the aforementioned front side continuous elastic members It is desirable that the contraction force of the ventral continuous elastic member of the aforementioned longitudinal position at the position closest to the aforementioned leg-opening is larger.

According to such an absorbent article, it is possible to more effectively suppress the fact that the portion of the abdominal side of the absorbent body is suspended by the weight after absorption of urine. The details are as follows. As described above, first, in the present invention, the total contraction force of the plurality of back side continuous elastic members of the back side belt member is set to suppress the above-described hanging, and the plurality of continuous elastic members of the abdominal side belt member are provided. The sum of the contraction forces is larger, whereby the ventral portion of the absorbent body can be pulled toward the back side, but the contribution rate of the pulling action is not The same is true for all of the back side continuous elastic members, and likewise for all of the ventral continuous elastic members. Further, with respect to the continuous elastic member most in relation to the pulling action, the back side continuous elastic member is a back side continuous elastic member in the longitudinal direction of the back side belt member closest to the leg opening, and the other side Regarding the ventral continuous elastic member, it is a ventral continuous elastic member at a position in the longitudinal direction of the ventral side belt member closest to the leg opening. Therefore, if the contraction force of the back side continuous elastic member closest to the position of the leg opening is set to be larger than the contraction force of the front side continuous elastic member closest to the position of the leg opening, the effect can be more effective. The back side pulls up the ventral portion of the absorbent body, and as a result, it is possible to more effectively suppress the ventral portion from hanging down.

In the absorbent article, the front side belt member is a sheet-like member as a base material, and the front side continuous elastic member and the front side discontinuous elastic member are provided to the sheet-like member, and the back side belt member is The sheet-like member is used as a base material, and the back side continuous elastic member and the back side discontinuous elastic member are provided to the sheet-like member.

The sum of the magnitudes of the contraction forces of the front side continuous elastic members means that the state in which the sheet-like members are unfolded until the sheet-like members become the natural length in the lateral direction is 100% in the stretched state, and is 70% in the stretched state. The sum of the magnitudes of the aforementioned lateral contraction forces generated by the aforementioned ventral continuous elastic members, the sum of the magnitudes of the contracting forces of the back side continuous elastic members means that the sheet member is to be unfolded to the aforementioned flaky members in the aforementioned lateral direction become When the state of the natural length is 100% of the stretched state, the sum of the magnitudes of the aforementioned lateral contraction forces generated by the back side continuous elastic member in the 70% stretched state is desirable.

According to such an absorbent article, it is possible to surely cause a large contraction force of the back side continuous elastic member to act on the ventral side portion of the absorbent body via the abdominal side belt member, whereby the ventral side can be surely pulled up toward the back side section. Therefore, it can be surely prevented that the ventral portion in the absorbent body may hang down after absorbing urine.

===This embodiment ===

FIG. 2 is a schematic perspective view of the disposable diaper 1 of the three-part type as an example of the absorbent article of the embodiment. 3 is a schematic plan view of the diaper 1 viewed from the skin side, and FIG. 4 is a schematic perspective view of the diaper 1 viewed from the non-skin side. 5A is a cross-sectional view taken along line A-A and a cross-sectional view taken along line C-C in FIG. 3, and FIG. 5B is a cross-sectional view taken along line B-B in FIG.

As shown in FIGS. 3, 5A, and 5B, the diaper 1 has three directions in which the longitudinal direction and the lateral direction and the thickness direction are orthogonal to each other. Moreover, since the diaper 1 is a so-called three-part type, it has three parts 10, 30a, and 30b. In other words, the diaper 1 has a absorbing body 10 that absorbs urine at the crotch portion of the user as a first component, and has a ventral side member 30a that covers the ventral portion of the wearer as a second component. The back side belt member 30b covering the back side portion of the wearer is used as the third part. Moreover, in the unfolded state of Fig. 3, the front side belt member 30a and the back side belt member 30b are in mutual The absorbent body 10 is laid between the partitions in a substantially parallel arrangement, and the end portions 10ea, 10eb of the longitudinal direction of the absorbent body 10 are joined and fixed to the respective closest belt members. 30a, 30b, and its external shape is a slightly H shape in plan view. Further, from this state, the absorbent body 10 is folded in half at the center position C1 in the longitudinal direction of the diaper 1, and the belt members 30a and 30b which face each other in the folded state must be in contact with each other. When the side portions 30ae and 30be of the flank (that is, the respective end portions 30ae and 30be in the lateral direction) are coupled, the belt members 30a and 30b are connected to each other in a ring shape, thereby forming the same as shown in FIG. A diaper 1 in which the waist opening 1HB and the pair of leg openings 1HL and 1HL are worn.

Further, various connection structures can be employed to connect the above-described connection structures of the belt members 30a and 30b. In addition, for example, a diaper 1 of a shorts type can be used, and a diaper 1 of a pants type can be used, and a detachable connection structure such as a buckle member (not shown) can be used. Diapers. Moreover, in this example, the former connection structure is used, and the diaper 1 becomes a pants type. In the following description, only the longitudinal direction, the lateral direction, and the thickness direction of the diaper 1 are referred to as "longitudinal direction", "lateral direction", and "thickness direction". In addition, in the thickness direction, the side in contact with the wearer is also referred to as "skin side", and the opposite side is also referred to as "non-skin side".

Hereinafter, the three components 10, 30a, and 30b of the diaper 1 will be described with reference to Figs. 2 to 5B. As shown in FIG. 3 and FIG. 5B, the absorbent main body 10 is provided as an example of a liquid absorbent fiber. The pulp fiber is formed into an absorbent core 11 having a substantially hourglass shape in a plan view as an example of a predetermined shape, a surface sheet member 13 covering the absorbent core 11 from the skin side of the core 11, and a non-skin from the core 11 The inner cover sheet member 15 is covered on the side to cover the outer core of the absorbent body 10. Further, such an absorbent core 11 may contain, for example, a highly absorbent polymer as a liquid absorbing granular material, or may contain a liquid absorbing material other than liquid absorbing particles and liquid absorbing granular materials. . Further, the absorbent core 11 may be covered with a liquid permeable sheet (not shown) such as tissue paper.

The surface sheet member 13 is, for example, a liquid permeable non-woven fabric having a larger planar size than the absorbent core 11. Further, as shown in FIG. 5B, the inner sheet member 15 is also a sheet having a larger planar size than the absorbent core 11, and an example thereof may be a liquid impervious leakproof such as polyethylene or polypropylene. A sheet 15 having a two-layer structure of a sheet 15a and an exterior sheet 15b such as a nonwoven fabric. Further, in a state in which the absorbent core 11 is interposed between the inner sheet member 15 and the surface sheet member 13, the leak-proof sheet 15a of the inner sheet member 15 is protruded from the four sides of the absorbent core 11 toward the outside. The surface sheet member 13 is pasted into a frame shape, whereby the absorbent body 10 can be roughly formed.

Further, as shown in FIG. 2, FIG. 3, and FIG. 5B, the so-called three-dimensional folded edge LSG and the leg-surrounded folded edge LG may be formed by the outer sheet 15b. The three-dimensional folded edge LSG is a leakage preventing wall portion LSG which is provided at each end portion of the surface sheet member 13 in the lateral direction. On the other hand, the leg-surrounding folded edge LG is formed in each leg opening of the diaper 1. 1HL, 1HL expansion and contraction department LG. When the outer sheet 15b is described in detail, first, as shown in Fig. 5B, the lateral dimension of the outer sheet 15b is set larger than the leakage preventing sheet 15a, that is, the outer sheet 15b is prevented. The lateral sides of the drain sheet 15a are largely convex toward the lateral direction. Further, the protruding portion 15bf is folded back toward the center side in the lateral direction at a position where the end portion 10es of the lateral direction of the absorbent body 10 is folded, and the elastic member 17 such as silk rubber is longitudinally located in the vicinity of the folded-back position. It is fixed in the longitudinal direction under elongation, whereby the leg-surrounding edge LG described above is formed. Further, the folded portion 15bg is further extended to the lateral center side, and is joined to the end portion at a position covering the lateral end portion of the surface sheet member 13. Further, the portion joined to the end portion functions as the base end portion LSGb of the three-dimensional hemming edge LSG, that is, a portion on the side of the front end portion which is located laterally closer to the base end portion LSGb as the free end portion LSGf becomes a usable surface. The sheet member 13 stands up. Further, at the front end portion of the free end portion LSGf, the elastic member 18 such as silk rubber is fixed in the longitudinal direction in the longitudinal direction under elongation. Therefore, the absorbent body 10 is bent in the longitudinal direction by the longitudinal contraction of the elastic member 18 so that the side sheet member 13 side becomes the inner peripheral side, but at the time of the bending, the free end portion LSGf is obtained from the elastic member 18 The contraction force imparted is contracted in the longitudinal direction to rise from the surface sheet member 13, whereby the free end portion LSGf functions as a three-dimensional hemming LSG.

Further, although not shown, a liquid permeable sheet such as a thin paper may be interposed between the surface sheet member 13 and the absorbent core 11 or between the back sheet member 15 and the absorbent core 11 as described above. The second sheet.

As shown in FIG. 3, each of the front side belt member 30a and the back side belt member 30b is a sheet member of a substantially rectangular shape in plan view, for example, using a soft sheet such as non-woven fabric as a material. Here, as shown in FIG. 5A and FIG. 5B, each of the belt members 30a and 30b is formed by overlapping two sheets of non-woven fabrics 31 and 32 (corresponding to a sheet-like member), and each of the belt members 30a and 30b is in each lateral direction. The central portions 30ac and 30bc cover the longitudinal end portions 10ea and 10eb of the absorbent body 10 from the non-skin side of the absorbent body 10, and the central portions of the belt members 30a and 30b are overlapped at the respective end portions 10ea and 10eb. 30ac, 30bc are joined.

Further, the two sheets of non-woven fabrics 31, 32 may not be the same size with each other. For example, in Fig. 6 which is a diagram for the description, a cross-sectional view taken along line VI-VI in Fig. 3 showing such a configuration may be used. In other words, in Fig. 6, the size of the longitudinal direction of each other is different, and the non-woven fabric 31 on the non-skin side in the thickness direction protrudes toward the longitudinal end side of the nonwoven fabric 32 on the skin side. Further, in this case, as shown in FIG. 6, in the nonwoven fabric 31 on the non-skin side, the vicinity of the longitudinal end edge of the non-woven fabric 32 on the skin side is formed from the non-woven fabric 32 on the skin side toward the longitudinal projection 31f. The folded-back position is folded back toward the center side in the longitudinal direction. Further, the folded portion 31g is joined by the nonwoven fabric 32 which is superposed on the skin side. Further, at the time of the folding back, a portion of the longitudinal end portions 10ea, 10eb of the absorbent body 10 may be covered from the skin side of the absorbent body 10 by the above-described folded portion 31g.

Here, the superposition of the absorbent body 10 to the central portions 30ac, 30bc of the above-described belt members 30a, 30b is as shown in Fig. 3, in the belt member 30a, The longitudinal end portions 30ae2, 30be2 of 30b do not overlap the absorbent body 10, and the absorbent body 10 is overlapped at the portions 30ac2, 30bc2 on the center side in the longitudinal direction of the end portions 30ae2, 30be2. Further, by this, the longitudinal end portions 30ae2, 30be2 of the belt members 30a, 30b are portions 30ae2, 30be2 which are provided so as not to overlap the absorbent body 10 at all in the transverse direction. Further, since the non-overlapping portions 30ae2 and 30be2 are portions that constitute the waist opening 1HB (Fig. 2) of the diaper 1, the portions 30ae2 and 30be2, and the elastic members 35U to be described later are substantially the entire length in the lateral direction of the portions 30ae2 and 30be2. Continuously set.

In the following, the portions 30ap and 30bp in which the absorbent body 10 is superposed on the belt members 30a and 30b of Fig. 3 are referred to as "overlap portions 30ap and 30bp", but in the present embodiment, the belly belt is used. The longitudinal direction La of the overlapping portion 30ap of the member 30a is set larger than the longitudinal direction Lb of the overlapping portion 30bp of the back side belt member 30b (La>Lb). That is, the absorbent body 10 as a whole is disposed on the front side belt member 30a than the back side belt member 30b. Moreover, this ensures a good and smooth absorption of urine. In other words, the urination is mainly performed at a position on the ventral side than the central position C1 of the longitudinal diaper 1, but the absorbent body 10 can be quickly and fully provided as long as the absorbent body 10 is disposed on the ventral side as described above. The absorbable volume absorbs urine that is expelled at the ventral position.

Further, the lateral dimensions of the belt members 30a, 30b are set to be larger than the lateral dimension of the absorbent body 10, whereby the belt members 30a, 30b are more oriented than the above-mentioned overlapping portions 30ap, 30bp. The sides of the horizontal protrude. That is, the belt members 30a, 30b are respectively on the lateral sides The protruding portions 30aw and 30bw which protrude more laterally than the overlapping portions 30ap and 30bp.

3, 5A, and 5B, between the two nonwoven fabrics 31, And the non-woven fabrics 31 and 32 are joined and fixed in the lateral direction by elongation, whereby the contraction force in the lateral direction is imparted to the abdominal side belt member 30a. Further, the plurality of elastic members 35, 35, ... are arranged side by side in the longitudinal direction and are arranged in the longitudinal direction.

Further, in the following, in the convenience of explanation, as shown in FIG. 4, the front side belt member 30a is divided into three regions AU, AM, AD in the longitudinal direction, and three longitudinally arranged from the longitudinal end side toward the center side. Each of the areas AU, AM, and AD is referred to as "upper area AU", "middle area AM", and "lower area AD". Further, any of the regions AU, AM, and AD also becomes a strip-shaped region along the lateral direction.

As shown in FIG. 4, the upper region AU is a portion constituting the waist opening 1HB of the diaper 1, and this region AU is a region where the lateral full length absorbent body 10 does not overlap at all. Further, in the upper region AU, the elastic member 35U (35) is continuously disposed from the one end portion in the lateral direction of the region AU to substantially the entire length of the other end portion, and is fixed in the lateral direction under the extension. Therefore, according to the elastic member 35U (35), a lateral contraction force is applied to the upper region AU in the lateral direction substantially at the entire length in the lateral direction, and the contraction force is a contraction force of the waist opening 1HB of the diaper 1. Further, the elastic member 35U (35) of the upper region AU functions as the "ventral continuous elastic member 35a" of the present invention, and will be described later.

The central portion AM is a region in which the longitudinal end portion 10ea of the absorbent body 10 is superposed on the lateral central portion AMc and fixed. More specifically, in the central portion AMc of the region AM, the portion 10n in which the absorptive core 11 does not exist in the absorbent body 10 is superposed and fixed. Therefore, the central portion AMc is a portion in which the absorbent body 10 is superposed on the central portion AM, that is, a part of the aforementioned overlapping portion 30ap.

Further, the central portion AM has protruding portions AMw and AMw which are protruded laterally from the central portion AMc which is the overlapping portion 30ap on both sides in the lateral direction, but the protruding portions AMw and AMw become the aforementioned protruding portions. Part of 30aw.

Further, in the central portion AM, the elastic member 35U (35) is continuously disposed from the one end portion in the lateral direction of the region AM to the other end portion, and is fixed in the lateral direction while being elongated. Further, by this, the elastic member 35M (35) imparts a lateral contraction force in the lateral direction substantially at the entire length of the central portion AM. Further, the elastic member 35M (35) of the central portion AM functions as the "ventral continuous elastic member 35a" of the present invention, but the lower region AD to be described later is also superposed on the central portion ADc in the lateral direction. The portion 10p of the absorbent core 11 in the body 10 is provided with a more defined area. That is, the central portion ADc is a part of the aforementioned overlapping portion 30ap. Further, the lower region AD has protruding portions ADw and ADw which are protruded laterally from the central portion ADc which is the overlapping portion 30ap on both sides in the lateral direction, but the protruding portions ADw and ADw also become the aforementioned projections. Part of the 30aw part. That is, the aforementioned protruding portion 30aw spans the central region AM and the lower portion described above. Area AD.

In the lower region AD, the elastic member 35D is discontinuously arranged in the lateral direction. In this example, the elastic members 35D (35) are arranged discontinuously in the central portion ADc, but the protruding portions ADw and ADw located on both sides in the lateral direction of the central portion ADc are respectively protruded from the protruding portions. The elastic member 35D (35) is continuously disposed at substantially the entire length of the one end portion of the ADw across the other end portion, and is fixed in the lateral direction while being elongated. Further, by this, the lateral contraction force is given to the above-described protruding portions ADw and ADw in the lower region AD. Further, if the discontinuous portion of the elastic member 35D (35) is present in the central portion ADc, the liquid absorbing inhibition of the absorbent core 11 can be effectively prevented, but this will be described later. In addition, the elastic member 35D (35) of the lower region AU functions as the "ventral discontinuous elastic member 35na" of the present invention, and will be described later.

In addition, although the elastic members 35 and 35 of the front side belt member 30a are described above, detailed specifications such as the thickness, the number of the elastic members 35, 35, and the arrangement position in the longitudinal direction may be specified. Further, with respect to the basic configuration, the elastic members 35, 35, ... of the back side belt member 30b are also substantially the same. For example, as shown in FIG. 4, the back side belt member 30b is also arranged in the longitudinal direction with three areas AU, AM, and AD. In detail, the upper area AU, the middle area AM, and the lower area AD are arranged in this cautious arrangement from the end side toward the center side in the longitudinal direction. Further, any of the regions AU, AM, and AD also serves as a strip-shaped region along the lateral direction. Furthermore, the central area AM has two central portions AMc in the lateral direction and two lateral portions in the central portion AMc. Each of the protruding portions AMw and AMw at each position on the side is a part of the above-described overlapping portion 30bp, and each of the protruding portions AMw and AMw is a part of each of the above-described protruding portions 30bw and 30bw. Further, the lower region AD has a central portion ADc in the lateral direction and projections ADw and ADw on both sides in the lateral direction of the central portion ADc, and the central portion ADc is a part of the above-described overlapping portion 30bp. Each of the protruding portions ADw and ADw is a part of each of the above-described protruding portions 30bw and 30bw. Therefore, a detailed description of the elastic member 35 of the back side belt member 30b will be omitted. Further, the elastic member 35U (35) of the upper region AU of the back side belt member 30b and the elastic member 35M (35) of the middle portion AM function as the "back side continuous elastic member 35b" of the present invention, and the lower region AD The elastic member 35D (35) functions as the "back side discontinuous elastic member 35nb" of the present invention, but will be described later.

However, the urination position on the diaper 1 is generally located on the ventral side more than the longitudinal center position C1 (Fig. 3) of the diaper 1. Therefore, at the time of urination, although the ventral portion 10a forming the absorbent body 10 absorbs urine first, as described above, in the present embodiment, the absorbent body 10 is disposed on the ventral side belt than the back side belt member 30b. The member 30a, while at this time in the ventral portion 10a, may not be insufficient in capacity. However, due to the offset arrangement, as shown in FIG. 7, the portion 10a on the ventral side of the absorbent body 10 may be drastically lowered due to the weight of the absorbed urine. That is, the portion where the ventral portion 10a is concentrated to absorb urine is provided by the offset of the ventral side of the absorbent body 10 described above. The fear of the portion 10a that is biased to the ventral side is increased, and as a result, there is a possibility that the portion 10a of the ventral side is suspended.

Further, when the hanging is too large, not only the appearance is poor, but also the gap between the absorbent main body 10 and the skin of the user is greatly enlarged, and a large amount of leakage of urine from the gap may occur.

Here, in the present embodiment, as shown in FIG. 7, the portion 10a on the ventral side of the absorbent body 10 is pulled up on the back side mainly by the contraction force of the predetermined elastic member 35b of the back side belt member 30b, whereby The hanging of the ventral portion 10a is suppressed. The details will be described below.

Further, in the following description, it is necessary to distinguish between the elastic member 35 of the front side belt member 30a and the elastic member 35 of the back side belt member 30b. Therefore, as will be described below, the elastic members 35 of the front side belt member 30a and the elastic members 35 of the back side belt member 30b are relabeled with mutually different symbols, and further, for each of the elastic members 35U, 35M of the respective regions AU, AM, AD 35D marks the following new names.

First, as shown in FIG. 4, each region of the upper region AU and the central region AM of the abdominal band member 30a will be

The elastic members 35U and 35M which are continuously provided over substantially the entire length in the lateral direction are referred to as "ventral continuous elastic members 35a". Further, the elastic member 35D provided to the lower region AD of the front side belt member 30a, that is, the central portion ADc in the lateral direction is discontinuous, and the projections ADw on both sides of the central portion ADc, The elastic member 35D in which the ADw is connected to the lateral direction is referred to as a "ventral discontinuous elastic member 35na".

And similarly, with respect to the upper region AU of the back side belt member 30b and Any of the elastic members 35U, 35M in which the respective regions of the central region AM are continuously provided over substantially the entire length in the lateral direction are referred to as "back side continuous elastic members 35b", and are in the lateral direction with respect to the lower region AD of the back side belt member 30b. The central portion ADc is discontinuous, and the respective protruding portions ADw and ADw positioned on both sides of the central portion ADc are referred to as "back side discontinuous elastic members 35nb".

<<<About the ventral continuous elastic member 35a and the back side continuous elastic member 35b>>>

8A and 8B are schematic enlarged views of the front side belt member 30a when viewed from the non-skin side of the diaper 1, and Fig. 9 is a schematic enlarged view of the back side belt member 30b when viewed from the non-skin side of the diaper 1. .

Moreover, FIG. 10 is a schematic view showing a state in which the front side belt member 30a and the back side belt member 30b are connected.

As shown in Fig. 8A, a plurality of ventral continuous elastic members 35a, 35a, ... are provided in the lateral direction of the upper region AU of the abdominal band member 30a and the central region AM across the lateral belt member 30a. As shown in Fig. 9, in the upper region AU and the middle region AM of the back side belt member 30b, a plurality of back side continuous elastic members 35b, 35b, ... are provided across substantially the entire lateral direction of the back side belt member 30b. Further, as shown in Fig. 10, when the lateral end portions 30ae, 30ae of the abdominal side belt member 30a and the lateral end portions 30be, 30be of the back side belt member 30b are joined by welding, the longitudinal direction of the abdominal side belt member 30a is obtained. The end edge portion 30aee and the longitudinal end edge portion 30bee of the back side belt member 30b are opposite each other with a state in which the longitudinal step is almost absent. Connected to the lateral direction, whereby the upper region AU of the abdominal band member 30a and the lateral end portions of the central region AM, the upper region AU of the back side band member 30b, and the lateral ends of the central region AM are It is approximately connected to the horizontally. Further, the back side continuous elastic members 35b, 35b of the back side belt member 30b are individually set in accordance with the individual setting of the contraction forces of the respective front side continuous elastic members 35a, 35a, ... and the respective back side continuous elastic members 35b, 35b... The sum of the magnitudes of the contraction forces of ... is set to be larger than the sum of the magnitudes of the contraction forces of the abdominal continuous elastic members 35a, 35a, ... of the abdominal side belt members 30a.

Therefore, in the wearing state of the diaper 1, as shown in Fig. 7, the contraction force of the back side continuous elastic members 35b, 35b, ... which are won by the total is transmitted to the absorbent body 10 via the abdominal side belt member 30a. The ventral portion 10a acts as a pulling force toward the back side, whereby the pulling force pulls the ventral portion 10a toward the back side (for example, obliquely upward). Further, as a result, the ventral portion 10a is pulled up toward the back side against the weight of the absorbed urine, thereby suppressing the hanging of the ventral portion 10a. In addition, the term "the sum of the magnitudes of the contraction forces of the side continuous elastic members 35a, 35a, ..." means that the nonwoven fabrics 31, 32 which are the base material of the front side belt members 30a become natural in the lateral direction (for example, When the non-woven fabrics 31 and 32 are pulled in the horizontal direction and the state in which the stress of the nonwoven fabrics 31 and 32 is not zero, when the state in which the belt member 30a is laterally developed is set to 100% in the extended state, 70% of the state of elongation is the sum of the forces generated by all of the ventral continuous elastic members 35a, 35a. Similarly, the sum of the magnitudes of the contraction forces of the back side continuous elastic members 35b, 35b, ... is also the nonwoven fabric 31 which will become the base material of the back side belt member 30b, When the state in which the belt member 30b is deployed in the lateral direction is set to 100% in the horizontal direction, the force generated in all of the back side continuous elastic members 35b and 35b is 70% in the extended state. The sum of the sizes. In addition, the reason why the total of the contraction force is the 70% elongation state as described above is that the wearing state of the diaper 1 is generally contracted in the transverse direction when the unfolded state of FIG. 3 is generally 100%. The state up to its 70% state. The measurement method of the sum of the contraction forces will be described later.

Further, the sum of the magnitudes of the contraction forces of the back side continuous elastic members 35b, 35b, ... is, for example, 1.1 times to 1.5 times the sum of the contraction forces of the front side continuous elastic members 35a, 35a, ... Any value of the range is desirably set to an arbitrary value in the range of 1.1 times to 1.3 times.

Further, in the upper region AU and the central region AM of FIG. 9, the sum of the magnitudes of the contraction forces of the back side continuous elastic members 35b, 35b, ... may be set to be the same or different, and in this case, different. . Here, at different times, it is desirable to set the contraction force of the back side continuous elastic members 35b, 35b... of the upper region AU from the sum of the contraction forces of the back side continuous elastic members 35b, 35b, ... of the middle region AM. The sum is larger. For this reason, it is conceivable that the closer the contraction force of the back side continuous elastic members 35b, 35b... belonging to the region to the region of the absorbent body 10 is more easily transmitted to the ventral portion 10a of the absorbent body 10, the The pulling effect of the ventral portion 10a is further enhanced.

Moreover, the number of the back side continuous elastic members 35b, 35b, ... which are respectively provided in the upper region AU and the middle region AM may be singular or complex. number. However, it is more effective to provide a contraction force in a substantially uniform manner in substantially the entire area of each of the regions AU and AM. Further, when the upper region AU and the middle region AM each include a plurality of back side continuous elastic members 35b, 35b, ..., between the back side continuous elastic members 35b, 35b ... belonging to the same region AU (AM) It can also make the contraction force of each other different or the same size. In this example, the magnitudes of the contraction forces of the entire back side continuous elastic members 35b, 35b, ... belonging to the upper region AU are made equal to each other, and all of the back side continuous elastic members 35b belonging to the central region AM, The magnitudes of the contraction forces of 35b... become the same value with each other. Further, in this way, further equalization of the contraction force in each of the regions AU and AM is achieved.

The above description is mainly directed to the upper region AU of the back side belt member 30b and the back side continuous elastic members 35b, 35b of the middle portion AM, but the above description of the back side continuous elastic members 35b, 35b... The upper region AU of the front side belt member 30a of FIG. 8A and the respective front side continuous elastic members 35a, 35a of the middle portion AM are also almost directly applicable. Therefore, the description of each of the side continuous elastic members 35a, 35a, ... of the upper region AU and the middle region AM of the front side belt member 30a will be omitted.

Here, it is desirable that the magnitude relationship of the total size of the contraction force described above is established even when the central regions AM and AM of the front side belt member 30a and the back side belt member 30b are compared with each other. That is, the sum of the magnitudes of the contraction forces of the back side continuous elastic members 35b, 35b, ... belonging to the central portion AM of the back side belt member 30b is set to be continuous to the ventral side of the central portion AM of the abdominal side belt member 30a. The magnitude of the contraction force of the elastic members 35a, 35a... The sum is larger.

Further, when it is set in this manner, it is possible to more effectively suppress the sag of the portion of the abdominal portion 10a of the absorbent main body 10 after the absorption of the urine described above. Further, the reason why the above-described magnitude relationship is better in the central region AM than the upper region AU is the same as described above. In other words, since the central region AM is closer to the absorbent body 10 than the upper region AU, it is conceivable that the contraction force is good.

Further, from the viewpoint of the conveyance of the contraction force, it is desirable to compare the one abdominal continuous elastic member 35a closest to the absorbent body 10 and the middle portion of the back side belt member 30b in the central region AM of the abdominal side belt member 30a. In the case of the back side continuous elastic member 35b closest to the absorbent body 10 in the region AM, the contraction force of the back side continuous elastic member 35b may be set larger than the contraction force of the front side continuous elastic member 35a.

That is, the above setting can be changed as will be described next. That is, the magnitude of the contraction force of one of the ventral continuous elastic members 35a of the plurality of ventral continuous elastic members 35a, 35a, ... in FIG. 8A with respect to the position closest to the leg-opening 1HL in the longitudinal direction is compared with When the contraction force of the back side continuous elastic member 35b of one of the plurality of back side continuous elastic members 35b, 35b, ... with respect to the position closest to the leg-opening 1HL in the longitudinal direction is 9, the back side of the latter is continuously elastic The contraction force of the member 35b is set to be larger than the contraction force of the ventral continuous elastic member 35a of the former.

<<<About the ventral discontinuous elastic member 35na and the back side discontinuous elastic member 35nb>>>

As described above, the ventral discontinuous elastic member 35na shown in Fig. 8A is an elastic member 35na which is provided discontinuously in the lateral direction of the lower region AD of the abdominal band member 30a. Similarly, the back side shown in Fig. 9 is not The continuous elastic member 35nb is an elastic member 35nb that is discontinuously disposed in the lateral direction in the lower region AD of the back side belt member 30b. Further, with respect to any of the members of the front side discontinuous elastic member 35na and the back side discontinuous elastic member 35nb, the discontinuous portions are also set in the lateral central portion ADc of each of the lower regions AD and AD, whereby At least the portion other than the central portion ADC is provided with the elastic member 35wa or the elastic member 35wb continuously in the lateral direction.

In the detailed description, first, as described above, with respect to any of the members of the front side belt member 30a of FIG. 8A and the back side belt member 30b of FIG. 9, an absorbent body is superposed on the lateral center portion ADc of the lower portion AD, respectively. Further, the lower region AD has projections ADw and ADw which protrude in the lateral direction from the absorbent body 10 at respective positions on both sides in the lateral direction of the central portion ADc.

Further, the front side discontinuous elastic member 35na of Fig. 8A has a side elastic member 35wa provided to connect one of the protruding portions ADw of the lower region AD in the lateral direction, and is provided to be connected to the other protruding portion ADw in the lateral direction. Further, a side elastic member 35wa is provided between the side elastic members 35wa of one of the protruding portions ADw and spaced apart in the lateral direction at the central portion ADc. Similarly, the back side discontinuous elastic member 35nb of FIG. 9 also has a side elastic member 35wb which is provided to connect one of the protruding portions ADw of the lower region AD in the lateral direction, and is provided to be connected to the other protruding portion ADw in the lateral direction. And at the side elastic member with one of the protrusions ADw A side elastic member 35wb provided between the 35wb at the center portion ADc at intervals in the lateral direction.

Moreover, if such a structure is provided, the absorption of the absorbent body 10 can be effectively prevented. In other words, each of the lower regions AD and AD of the front side belt member 30a and the back side belt member 30b is provided with each of the central portions ADc and ADc in the lateral direction of the overlapping portions 30ap and 30bp of the absorbent body 10, respectively. Corresponding to portions of the ventral discontinuous elastic member 35na and the back side discontinuous elastic member 35nb that are not present in the elastic member, respectively. Therefore, the application of the contraction force of the overlapping portions 30ap and 30bp which are the central portions ADc and ADc is reduced, whereby the contraction force of the elastic members 35na and 35nb is effectively caused by the occurrence of wrinkles in the absorbent body 10. Being prevented. Further, as a result, the skin side surface of the absorbent main body 10 can be maintained substantially flat, and the liquid absorption of the absorbent main body 10 can be prevented.

Further, in the example of FIG. 8A and FIG. 9, the ratio of the total contraction force of the plurality of side elastic members 35wa, 35wa, which are provided in the protruding portion ADw of the front side belt member 30a is set to The sum of the contraction forces of the plurality of side elastic members 35wb, 35wb, ... of the above-described protruding portion ADw of the back side belt member 30b is larger. Moreover, by this, the ventral portion 10a of the absorbent body 10 can be pulled by a larger force than the back side portion 10b from both sides in the lateral direction. Therefore, the portion 10a on the ventral side of the absorbent body 10 is rapidly expanded in the lateral direction, and the side surface of the skin is likely to be substantially flat. As a result, the area of the portion 10a on the ventral side of the urine and the skin can be increased, and the area can be increased. Urine absorption.

Further, the protrusion of the lower region AD of the abdominal band member 30a is provided. The number of the side elastic members 35wa of the portion ADw may be singular or plural. However, it is preferable to provide the contraction force evenly in the plural whole of the protruding portion ADw in a plural number. Further, in a plurality of cases, the contraction forces of the side elastic members 35wa and 35wa may be substantially different from each other, or may be identical. In this example, the magnitudes of the contraction forces of all of the side elastic members 35wa and 35wa are equal to each other. Further, in this way, further equalization of the contraction force of the protruding portion ADw is achieved. Further, in these cases, the same applies to the side elastic members 35wb provided in the protruding portion ADw of the lower region AD of the back side belt member 30b.

Here, it is desirable that the side elastic member 35wa of the front side belt member 30a is extended from the protruding portion ADw of the lower region AD toward the center side in the lateral direction as shown in FIG. 8A, and the end portion of the extended portion is further desired. The 35wae is joined to the lateral end 10ew in the absorbent body 10. Further, according to this configuration, the contraction force of the side elastic members 35wa, 35wa, ... can be surely given to the abdominal portion 10a of the absorbent body 10 from both sides in the lateral direction, thereby reliably making the ventral side The skin side of the portion 10a is substantially flat.

Further, from the viewpoint of flattening the skin side surface of the ventral portion 10a, it is more desirable that the extended end portion 35wae of the side elastic member 35wa of the front side belt member 30a is in the absorbent body as shown in Fig. 8B. In the case of 10, the end portion 11ew of the absorbent core 11 may be located. Further, in this case, the contraction force of the side elastic member 35wa can be surely transmitted to the ventral portion 11a of the absorbent core 11 which is the main portion of the absorbent body 10, whereby it can be used on both sides in the lateral direction. Large contraction force pulls this more reliably The portion 11a on the ventral side of the core 11 can more reliably flatten the skin side surface of the ventral portion 10a of the absorbent body 10.

On the other hand, in this example, as shown in Fig. 9, the side elastic member side elastic members 35wb, 35wb, ... of the back side belt member 30b are further extended from the protruding portion ADw of the lower region AD to The central side of the landscape. However, in the side elastic members 35wb, 35wb, ... of the back side belt member 30b, it is desirable that the extended portion end 35wbe is fixed in the absorbent body 10 at the lateral end more than the absorbent core 11. Side portion 10f. In addition, the contraction force of the side elastic member 35wb is less likely to be transmitted to the absorbent core 11 which is the main part of the absorbent body 10, whereby the portion 10b on the back side of the absorbent body 10 becomes A state that allows separation from the buttocks of the wearer. Therefore, it is easy to form a space between the wearer's buttocks and the absorbent body 10 to accommodate the discharged feces after the wearer's excretion. However, in this example, as shown in FIG. 10, the back side belt member 30b is provided with the so-called buttocks cover 30bf. That is, the longitudinal direction L30b of the back side belt member 30b is set to be larger than the longitudinal direction L30a of the front side belt member 30a. Further, the back side belt member 30b has an excess portion 30bf which extends beyond the leg-side opening 1HL beyond the front side belt member 30a, and the excess portion 30bf serves as a buttock cover 30bf covering the buttocks of the wearer. Features.

Here, when the buttocks cover 30bf is provided, it is desirable to elasticize the side of the plurality of side elastic members 35wa, 35wa, which are located in the protruding portion 30aw of the front side belt member 30a, which is closest to the position of the leg-opening 1HL. The ratio of the contraction force of the member 35wa is set to be located at the back side belt member 30b. The contraction force of the side elastic members 35wb of the plurality of side elastic members 35wb, 35wb, ... which are closest to the leg-opening 1HL in the protruding portion 30bw is larger.

Further, if it is set as described above, the above-mentioned excess portion 30bf of the back side belt member 30b is rapidly pulled toward the ventral side by the contraction force of the side elastic member 35wa of the front side belt member 30a, and the excess portion 30bf can be made. Quickly expand toward the ventral side. Therefore, the excess portion 30bf can be effectively functioned as the buttock cover 30bf.

Further, in this example, as shown in the enlarged view of Fig. 11, the end portions 10es of the lateral direction of the absorbent main body 10 function as the leg-folding LG, but it is desirable that the respective end portions 10es It is sufficient to be fixed to the lower region AD (see the hatching portion in FIG. 11) of the abdominal band member 30a via the joint portion J. Further, when configured as described above, the contraction force of the side elastic members 35wa and 35wa forming the protruding portion ADw of the lower region AD also acts on the upper end portions 10es of the absorbent body 10 via the joint portion J, whereby The end portion 10es is pulled toward the protruding portion ADw. Further, by this, the portion 10a on the ventral side in the absorbent body 10 is pulled up, and as a result, the hanging portion 10a of the ventral side which absorbs the urine can be further suppressed from falling down. Further, the joint portion J is formed of a suitable adhesive such as a hot-melt adhesive.

Here, the sum of the contraction forces of the front side continuous elastic members 35a, 35a, ... of the front side belt member 30a, and the sum of the contraction forces of the back side continuous elastic members 35b, 35b, ... of the back side belt member 30b The measurement method is explained. First, generate from diaper 1 Sample for measurement. In other words, the diaper having the waist opening 1HB and the two leg openings 1HL and 1HL as shown in FIG. 2 is separated from the portions 1s and 1s of the connection structure of the front side belt member 30a and the back side belt member 30b, thereby The diaper 1 is unfolded in the unfolded state of FIG. Further, the absorbent body 10 is further separated from the diaper 1, whereby the front side belt member 30a and the back side belt member 30b are separated into individual states. In this way, not only the lower region AD but also the lower region AD is cut out for each member of the front side belt member 30a and the back side belt member 30b, thereby forming a state in which the upper portion AU and the middle portion AM are left, thereby generating a sample for measurement.

Next, the respective end portions in the lateral direction of the measurement sample were fixed to the respective head portions of the tensile tester, and the sample was pulled at a stretching degree of 300 mm/min in the lateral direction. Further, when the state in which the nonwoven fabrics 31 and 32 constituting the sample are pulled to a natural length is set to an elongation state of 100%, the tensile load (N) of the testing machine in the 70% elongation state is read, and the The read value is regarded as the sum of the contraction forces described above. Further, when the test is performed on both the measurement sample of the abdominal side belt member 30a and the measurement sample of the back side belt member 30b, the abdominal continuous elastic member 35a of the above-described abdominal side belt member 30a can be obtained, The sum of the contraction forces of 35a... and the sum of the contraction forces on the ventral side of the back side continuous elastic members 35b, 35b of the back side belt member 30b.

In addition, the above-mentioned "natural length of the nonwoven fabrics 31 and 32" is a state in which the nonwoven fabrics 31 and 32 are not fixed to the front side continuous elastic members 35a and 35a and the back side continuous elastic members 35b and 35b. The original length of the non-woven fabrics 31 and 32 in the unloaded state in which the external force does not act, in other words, "the non-woven fabrics 31, 32 are pulled in the lateral direction. The state in the state of the slack state, and the lateral length of the state in which the stress of the nonwoven fabrics 31 and 32 is zero.

Further, in the above, the total contraction force of the side continuous elastic members 35a, 35a, ... in the front side belt member 30a, and the back side continuous elastic members 35b, 35b in the back side belt member 30b are The method of measuring the sum of the contraction forces will be described, but it is apparent that the sum of the contraction forces of the side elastic members 35wa, 35wa, ... in the protruding portion ADw of the lower region AD of the abdominal side member 30a is also performed by the same method. And the measurement of the sum of the contraction forces of the side elastic members 35wb, 35wb, ... in the protruding portion ADw of the lower region AD of the back side belt member 30b, so the description thereof will be omitted.

===Other implementations ===

The embodiments of the present invention have been described above, but the above-described embodiments are intended to facilitate the understanding of the present invention and are not intended to limit the present invention. It is to be understood that the invention may be modified or modified without departing from the spirit and scope of the invention. For example, there may be variations such as those shown below.

In the above-described embodiment, the diaper 1 for infants is exemplified as an example of the absorbent article, but this is not limited thereto. For example, the configuration of the present invention is also used for the diaper 1 for adults.

In the embodiment described above, as shown in FIG. 8B (or FIG. 9), the contraction force of the overlapping portion 30ap (30 bp) which is the portion of the belt member 30a (30b) which is superposed on the absorbent body 10 is reduced. Purpose, in the lower area The AD is provided with a discontinuous elastic member 35na (35nb), and such a discontinuous elastic member 35na (35nb) is provided with two side elastic members 35wa, 35wa (35wb, respectively) in each of the protruding portions ADW of the lower region AD. 35wb). Further, at the position of the central portion ADc of the lower region AD, the two side elastic members 35wa and 35wa (35wb, 35wb) are spaced apart from each other to arrange the side elastic members 35wa and 35wa (35wb, 35wb). Therefore, at the position of the interval, all the elastic members are not present, but are not limited thereto. In other words, in order to reduce the contraction force of the central portion ADc of the lower region AD, the elastic member may be present in the portion of the central portion ADc where the portion corresponding to the above-described interval is discontinuously disposed. Fig. 12 is a schematic plan view showing an example of the same. In addition, FIG. 12 shows a state in which the non-skin-side nonwoven fabric 31 in the front side belt member 30a is removed, and the front side continuous elastic member 35a and the front side discontinuous elastic member 35na are exposed to the outside. In the example of FIG. 12, the elastic members 35p and 35p which are shredded are disposed in the center portion ADc of the lower region AD at positions spaced apart from each other in the lateral direction of the two side elastic members 35wa and 35wa. .... Further, when such a thin strip state is formed, the elastic members 35p, 35p, ... do not substantially impart a contracting force to the central portion ADc. Therefore, if it is the elastic member 35p, 35p... in a thin state, it may not exist in the center part ADc. The length of the elastic member 35p in the thin strip state is set to be 5 mm or less larger than 0 mm, and more desirably set to a length of 3 mm or less larger than 0 mm.

However, when the finely-cut elastic members 35p, 35p... exist, due to the beauty Since the view is deteriorated, it is desirable that the elastic members 35p, 35p, ... are not present at the above-described spaced positions (Fig. 8B).

In the above-described embodiment, the material of the exterior sheet 15b and the belt members 30a and 30b is not woven, and it is not limited to the nonwoven fabric. For example, it may be a woven fabric or a sheet member other than the woven fabric. In other words, the exterior sheet 15b may be omitted. In this case, the leakage preventing sheet 15a is an exterior of the absorbent body 10. In the above-described embodiment, the silk rubber is exemplified for the front side continuous elastic member 35a, the front side discontinuous elastic member 35na, the back side continuous elastic member 35b, and the back side discontinuous elastic member 35nb, but is not limited thereto. Wait. For example, a strip-shaped rubber may be used for the elastic members 35a, 35na, 35b, and 35nb, and a belt-shaped non-woven fabric having a contracting force and a strip-shaped resin film having a contracting force may be used.

Claims (5)

An absorbent article comprising: an absorbent body disposed to absorb urine in a longitudinal direction; a ventral side belt member disposed along a lateral direction intersecting the longitudinal direction and superposed on the absorbent body a one end portion of the lateral direction is fixed; and a back side belt member which is formed as a different member from the front side belt member and which is provided along the lateral direction and which is superposed on the other end portion of the longitudinal direction of the absorbent body Being fixed, and forming a waist opening and an absorption of the two leg openings by joining the respective end portions of the lateral side belt member and the lateral end portions of the back side belt member An article characterized in that: the longitudinal direction of the overlapping portion of the front side belt member in which the absorbent body is superposed is a size in which the overlapping portion of the absorbent body is superposed on the back side belt member The aforementioned longitudinal direction is larger in size, and the aforementioned front side belt member is required to impart the aforementioned lateral contraction force to the aforementioned front side belt member, and has the aforementioned lateral end portion from the aforementioned front side belt member to the other end. a ventral continuous elastic member that is continuously disposed, and a ventral discontinuous elastic member that is discontinuously disposed in the lateral direction, the back side belt member is required to impart the aforementioned lateral contraction force to the back side belt member, and has a back side continuous elastic member continuously disposed from the one end portion of the front side belt member to the other end portion, and a back side discontinuous elastic member disposed discontinuously in the lateral direction, the back side belt member Contraction force of the aforementioned back side continuous elastic member The sum of the sizes is larger than the sum of the contraction forces of the aforementioned front side continuous elastic members of the front side belt member, and the aforementioned back side belt members are larger in size than the aforementioned front side belt by the aforementioned back side belt members. The aforementioned longitudinal dimension of the member is larger, and has an excess portion beyond the aforementioned front side belt member beyond the aforementioned leg-side opening, and among the plurality of the aforementioned ventral discontinuous elastic members, the position closest to the aforementioned leg-opening The contraction force of the ventral discontinuous elastic member is larger than the contraction force of the back side discontinuous elastic member of the plurality of the aforementioned back side discontinuous elastic members that is closest to the position of the aforementioned leg-opening. The absorbent article according to claim 1, wherein the front side belt member is provided on the both sides of the lateral direction by setting the overlapping portion in a central portion of the front side belt member in the lateral direction. Each of the ventral side discontinuous elastic members has a side elastic member that is continuously provided in the lateral direction in one of the protruding portions, and a lateral elastic member that is continuous in the lateral direction; and the other side The protruding portion is continuously continuous in the lateral direction, and a side elastic member provided at a distance between the side portion and the side elastic member of the one of the protruding portions at the center portion in the lateral direction, the back side belt member, The protrusion portion is set in the lateral center portion of the back side belt member, and each of the lateral sides has a protruding portion that protrudes laterally from the overlapping portion, and the back side is discontinuous. The elastic member has: the aforementioned protrusion on one side a side portion elastic member provided continuously in the lateral direction; and the other protruding portion is continuously provided in the lateral direction, and is in the central portion between the side elastic member and the side elastic member of the one of the protruding portions In the side elastic member provided at the laterally spaced apart interval, the total contraction force of the side elastic member of the protruding portion of the front side belt member is set to be larger than the aforementioned protruding portion of the back side belt member The sum of the contraction forces of the side elastic members is greater. The absorbent article according to claim 2, wherein the absorbent body has an absorbent core in which a liquid absorbing material is laminated, and a liquid permeating the absorbent core from the skin side. a surface sheet member; and a liquid-impermeable back sheet member provided from the non-skin side covering the absorbent core, wherein the side elastic member disposed in the protruding portion of the back side belt member is The central side of the lateral direction is elongated, and the end portion of the extended portion is a portion that is fixed to the end portion of the absorptive core at the lateral direction in the absorbent body. The absorbent article according to claim 2, wherein each of the lateral end portions of the absorbent body is fixed to the front side belt member via a joint portion, and the side portion of the protruding portion is elastic The contraction force of the member acts on the end portion via the joint portion, whereby the end portion is pulled toward the protruding portion. An absorbent article comprising: an absorbent body disposed to absorb urine in a longitudinal direction; a ventral side belt member disposed along a lateral direction intersecting the longitudinal direction and superposed on the absorbent body a one end portion of the lateral direction is fixed; and a back side belt member which is formed as a different member from the front side belt member and which is provided along the lateral direction and which is superposed on the other end portion of the longitudinal direction of the absorbent body Being fixed, and forming a waist opening and an absorption of the two leg openings by joining the respective end portions of the lateral side belt member and the lateral end portions of the back side belt member An article characterized in that: the longitudinal direction of the overlapping portion of the front side belt member in which the absorbent body is superposed is a size in which the overlapping portion of the absorbent body is superposed on the back side belt member The aforementioned longitudinal direction is larger in size, and the aforementioned front side belt member is required to impart the aforementioned lateral contraction force to the aforementioned front side belt member, and has the aforementioned lateral end portion from the aforementioned front side belt member to the other end. a ventral continuous elastic member that is continuously disposed, and a ventral discontinuous elastic member that is discontinuously disposed in the lateral direction, the back side belt member is required to impart the aforementioned lateral contraction force to the back side belt member, and has a back side continuous elastic member continuously disposed from the one end portion of the front side belt member to the other end portion, and a back side discontinuous elastic member disposed discontinuously in the lateral direction, the back side belt member The sum of the magnitudes of the contraction forces of the aforementioned back side continuous elastic members is larger than that of the aforementioned ventral side continuous elastic members of the aforementioned abdominal side belt members The sum of the magnitudes of the contraction forces is larger, and the contraction force of the plurality of the back side continuous elastic members of the back side continuous elastic member which is located closest to the front leg opening in the longitudinal direction is larger than that of the plurality of the aforementioned front side continuous elastic members The contraction force of the ventral continuous elastic member which is located most in the longitudinal direction in the vicinity of the aforementioned leg circumference opening is larger.