JP5325553B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper.

  Conventionally, a disposable diaper having a pair of fastening tapes on both sides of one end portion in the longitudinal direction, and fastening the fastening tape to a landin zone provided on the outer surface of the other end portion in the longitudinal direction (hereinafter referred to as a deployable diaper) A disposable diaper (hereinafter referred to as a pants-type diaper) in which a waist opening and a pair of leg openings are formed in advance is widely known. These disposable diapers usually have an absorbent body in the region from the wearer's stomach side to the back side through the crotch, but this absorbent body is thick, bulky and somewhat hard. It is not easy to follow the skin surface of the undulating wearer over the entire area and make it closely adhere. In particular, this type of diaper is provided with an elastic member that tightens the waist and thighs somewhat to prevent diaper slippage and leakage of liquids, etc. Become. Specifically, when a leg gather that tightens around the thigh bites into the base of the foot, the absorbent body in the inseam may easily float from the skin. In addition, if it is sandwiched between the left and right inner thighs, the crotch part will swell greatly and the force to leave the skin will work. When the absorbent body is separated from the body at the crotch part, excrement such as liquid is transmitted to the body surface, and when it is worsened, it leads to the outward leakage of the diaper. Moreover, even if there is actually no leakage of liquid or the like, the low adhesion of the skin gives a sense of concern and gives a very unstable impression to the wearer.

In order to improve the leakage of excrement from the wearer's crotch when the diaper slips down, there is one in which an absorbent pad member separate from the diaper is attached. For example, an elastic elastic member extending in the vertical direction from the abdominal side of the absorbent pad to the back side through the crotch may be disposed, and by this contraction, the absorbent pad may be lifted upward from the inner surface independently of the diaper body. It is known (see Patent Document 1).
Patent Document 2 discloses a technique of providing a back body lifting elastic member continuous in the diaper width direction for the purpose of lifting an absorbent body in the back body of a pant-type diaper. Patent Document 3 discloses a diaper in which a pair of left and right hip elastic members are intersected with a waistline elastic member in the back body to improve wearability and slippage prevention.
JP 2003-62009 A Japanese Patent Laid-Open No. 10-127687 JP 2005-168833 A

  The technique of patent document 1 uses a separate absorption pad member, does not improve the shape of the whole diaper mentioned above and improve fitting property. Simply placing an elastic member that applies vertical tension along the crotch from the crotch, for example, walking left and right thighs continued to move back and forth, or worn for a long time and hit the roll Sometimes, the elastic member bites deeply into the bottom of the butt and gives a strong discomfort. Needless to say, in order to return this to the original state, a very complicated response such as pulling the hand into the diaper and pulling out and pushing it out is forced.

  Moreover, although the technique of patent document 2, 3 can lift the absorber which exists in the back body to the back side, it is difficult to fully suppress the float of the absorber in a rupture part. Moreover, when carrying out the technical device which suppresses a burst like this invention, in patent document 2, the back body raising elastic member is distribute | arranged continuously in the diaper width direction, and it is related with the stretchable inhibition of a longitudinal direction. There is no consideration.

  In view of the problems that cannot be solved by providing the above-described conventional diaper or absorbent pad as a separate body, the present invention has a high anti-moisture prevention performance such as a liquid, particularly in the crotch, and maintains an appropriate adhesion of the absorbent body. An object of the present invention is to provide a disposable diaper that is suitably prevented from biting into a crack and has excellent comfort.

The present invention includes an absorbent core having a front portion and a rear portion, and extending from the front portion to the rear portion, and extends in a longitudinal direction extending from the front portion to the rear portion in a deployed state. A disposable diaper having a width direction,
The flange first elastic member extending in the longitudinal direction, which is present on the skin non-contact surface side with respect to the absorbent core, and the collar first elasticity in the plan view from the front portion side toward the rear portion side in the plan view. A pair of flange second elastic members disposed in the rear part, which are separated from both sides in the width direction from both sides of the member, and the flange second elastic members do not exhibit stretchability on the flange first elastic member. The above object is achieved by providing a disposable diaper configured as described above.

  In the disposable diaper of the present invention, the absorbent part of the diaper is easy to fit precisely into the wearer's crotch part, can prevent leakage of excrement such as liquid to the outside of the diaper, and is highly reliable for the wearer. Give a feeling. In addition, even if the above-mentioned good crotch fit is realized and the left and right thighs continue to move back and forth by walking, or if they are worn for a long time and turn over It is possible to achieve both excellent comfort and prevent excessive penetration of the cracks.

Hereinafter, the present invention will be described based on a preferred embodiment thereof with reference to the drawings.
FIG. 1 is a developed plan view of an extended state of the diaper 10 of the first embodiment of the present invention as viewed from the skin contact surface side. The diaper 10 is divided into a front side part A located on the wearer's front side and a rear side part B located on the rear side when the diaper 10 is divided into two equal parts in the longitudinal direction. More specifically, an absorbent main body 2 that mainly defines the crotch middle portion C, and an exterior body 3 that mainly defines the ventral portion F and the back portion R of the back side are provided. In FIG. 1, a part of the overlapped member of the absorbent main body 2 is displayed in a state where it is broken little by little.

The absorbent main body 2 includes a liquid-permeable top sheet 22, a liquid-impermeable back sheet 23, and an absorbent core 24 interposed between the two sheets 22 and 23.
The absorptive main body 2 has a rectangular shape in plan view, and has a long shape in the length direction (Y direction) of the diaper in FIG. The absorbent core 24 is sandwiched and fixed by a rectangular back sheet 23 and a rectangular top sheet 22. The absorbent core 24 has an hourglass shape like that illustrated in a plan view in a developed state, that is, a narrow portion interposed in the middle of the wide portion on both sides in the longitudinal direction (Y direction) is gentle. It has a reverse arc shape projecting inward. A midline cutting line (corresponding to a straight line corresponding to a line extending along the wearer's crack when worn) P ₁ which is the center of the absorbent core 24 in the diaper width direction (X direction) is the above-described absorbent core 24. The urinary excretion corresponding regions Q ₁ and Q ₂ (region Q _{1 for} men and region Q _{2 for} women) of the wearer are arranged along the defecation corresponding region Q ₃ . Thus, at the time of wear, the absorptive core 24 is along the crotch from the wearer's lower abdomen to the buttocks.

The absorbent main body 2 that mainly defines the crotch middle portion C includes a first buttock elastic member extending in the longitudinal direction (Y direction) at the center of the absorbent core 24 on the skin non-contact surface side of the absorbent core 24. 21 is arrange | positioned and forms the absorber gathers. In this embodiment, four elastic members are installed in parallel in the width direction (X direction), and the groin first elastic member 21 installed in an extended state when worn is contracted, so that the crotch of the diaper The part is pulled up to match the wearer's rupture, and the diaper 10 and the wearer's crotch are in close contact. In FIG. 1, P ₂ represents a Shirimizosen (those showing a portion corresponding to the gluteal groove of the wearer when worn linearly.).

  Both side edges of the absorbent main body 2 in the diaper width direction (X direction) are provided with a three-dimensional gather elastic member 44 that forms a three-dimensional gather that becomes a leak-proof cuff when worn. Due to the tension (stretching stress) of the elastic member 44 for three-dimensional gathers, the excrement leakage prevention performance is enhanced.

  The annular exterior body 3 exists from the back side R through the crotch C to the abdomen F, and the width is narrower than the back side R and the abdomen F at the crotch. . And it has the fastening tape 5 provided in the outer end part of the diaper width direction (X direction) of the back side part 31 in the back side part 31 which defines the back side part R. And the exterior body 3 and the absorptive main body 2 are contact | connected by the center part vicinity of the diaper width direction (X direction). Thus, the diaper 10 of this embodiment is divided into the back side part R, the abdominal side part F, and the crotch intermediate part C interposed by these both parts in the whole.

  In the present embodiment, the exterior body 3 is formed from two sheets such as a nonwoven fabric (shown as one sheet in the figure), and the inverted trapezoidal collar corresponding portion in the back side portion 31 of the exterior body 3. On both sides of the bag, it stretches in the width direction between the two sheets, near the wearer's crotch, and opens up in the height direction when viewed from the wearer's back (reverse "eight" shape) It has a pair of left and right collar second elastic members 41a and 41b arranged so as to be in a shape. In other words, the second elastic member of the buttock is located at the side of the first elastic member of the first heel part at one end that expresses the stretchability in the rear part B, and when viewed from above, the edge of the backside part R from the crotch intermediate part C As it goes to the part, it arranges so that it may leave | separate to the width direction both outer side of a diaper from the both sides of a collar part 1st elastic member. With this configuration, the collar second elastic member does not exhibit stretchability on the collar first elastic member on the absorber. Here, “so as not to express stretchability” means that the buttocks second elastic member is present so as not to exhibit stretchability and the stretchability is manifested by the absence of the buttocks second elastic member. Including the case of not doing. The heel second elastic member 41 comprising the pair of left and right heel second elastic members 41a and 41b exerts appropriate tension (stretching stress) according to the wearer's buttocks at the time of wearing, making a hip gather, A good fit is achieved by pinching the bulges protruding from the left and right sides of the buttocks from the ridge groove portion of the elastic member 41 to the upper side in the height direction from both sides and pulling them lightly. And since each collar part 2nd elastic member 41a, 41b distribute | arranged on either side is mutually separated in the diaper width direction center so that it may not overlap with the collar part 1st elastic member, the diaper longitudinal direction of a collar part 1st elastic member Stretching hindrance to the skin is small, the absorber floating is reduced, and the wearing feeling at the crack is also good. In addition, in the present embodiment, the second elastic member of the buttock is processed so as not to exhibit stretchability on the absorbent core 24, so that the force to shrink the absorbent core in the width direction does not work, and the absorbent core Since wrinkles are not required, the feeling of wearing becomes better, and the lifting force can be concentrated on the side of the absorbent body, so that it is difficult for gaps to form between the side of the absorbent core 24 and the wearer, and leakage-proofing Can also be increased. As a method of processing so as not to develop the stretchability of the buttocks second elastic member 41 on the absorbent core 24, it can be performed by using a conventionally known technique. For example, the elastic member is finely cut in an expanded state. Or a method of shrinking the elastic body to a natural length without applying a hot melt adhesive for fixing the elastic member, or heat-sealing the elastic body to eliminate stretchability.

  In this embodiment, the exterior body 3 fixes the waist elastic member 42 and the waistline elastic member 43 in the stretched state along the waistline direction. While these elastic members 42 and 43 are appropriately stretched in the waistline direction to form waist gathers and waistline gathers while being worn, the elastic members 42 and 43 are fitted to the wearer's waistline to bring the diaper 10 into close contact with the wearer.

  A fastening tape 5 is provided at an outer end of the back side portion 31 of the exterior body 3 in the diaper width direction (X direction). The fastening tape 5 has a structure in which a planar fastener 5b is attached to the skin surface side of the base sheet 5a, and a portion of the ear M where the planar fastener 5b is located protrudes in the X direction. The base material sheet 5a of the fastening tape 5 can be comprised from a nonwoven fabric, the laminated body of a nonwoven fabric, and a resin film etc., for example. Examples of the surface fastener (male member) include a structure in which ridge-shaped or mushroom-shaped minute protrusions are provided densely on the engaging surface 5i. Specifically, a normal mechanical hook-and-loop fastener that can be detachably fastened to the female member can be used. The mating member to which the surface fastener 5b is engaged may be a normal nonwoven fabric, and for example, a cloth material having a looped or crimped fiber surface may be used.

The fixing method of the exterior body 3 and the absorptive main body 2 is not specifically limited, It fixes with the adhesive agent etc. in the whole area | region of the predetermined area of the part which overlaps with the exterior body 3, or an absorptive main body Both can be joined only at the peripheral edge of 2, or both can be joined only at the center or both ends of the absorbent body 2 in the width direction.
Moreover, in this embodiment, the waist elastic member 42 similar to said exterior body 3 is made into the outer surface in the center part of the diaper width direction (X direction) of the front body side F of the absorptive main body 2 on the stomach side upper end part. A landing member 6 made of a nonwoven fabric provided on the side is bonded and fixed with an adhesive or the like.
For these bonding and fixing, for example, heat sealing, ultrasonic sealing, or the like can be used instead of the adhesive.

  Leg gathering elastic members 45 are arranged on the side edges of the side flaps excluding the fastening tape 5 of the outer package 3. Due to the tension (stretching stress) of the leg gather elastic member 45, while forming a good leg gather around the wearer's legs, the leg opening Lo is formed by tightening and wrapping appropriately. It fits around the thigh or the base of the foot and enhances the ability to prevent excrement leakage.

FIG. 2 is a cross-sectional view schematically showing a cross section taken along the line ZZ in FIG. In this embodiment, as FIG. 2 shows, the absorptive main body 2 is equipped with the back surface sheet 23, and the collar part 1st elastic member 21 is distribute | arranged between the absorptive core 24 and the back surface sheet 23 so that expansion | extension is possible. Yes. For this reason, the elastic gather of the absorber gathers formed by the buttocks first elastic member 21 and the hip gathers formed by the buttocks second elastic member 41 provided in the exterior body 3 are exerted by both elastic forces on the diaper 10. However, they are formed on substantially the same plane. On the other hand, the buttocks first elastic member 21 is formed on a different plane from the three-dimensional gather elastic member 44 that forms the three-dimensional gather G, and can be configured to satisfy each other's functions without impairing leakproofness. it can.
The arrangement position of the collar first elastic member 21 is not limited between the absorbent core 24 and the back sheet 23. For example, an elastic member holding sheet is provided outside the back sheet 23, and the back sheet The collar first elastic member 21 may be provided between the elastic member holding sheet 23 and the elastic member holding sheet.
2 that are not particularly mentioned have the same meaning as those shown in FIG. 1 (in the drawings described below, the description of the symbols described in the previous drawings is omitted). There is.)

In the diaper 10 of this embodiment, the nonwoven fabric on the outer surface of the landing member 6 is a female member of a mechanical surface fastener that can be engaged with the surface fastener 5b of the fastening tape 5. At the time of mounting, the surface fastener 5b of the fastening tape 5 is fastened to the outer surface of the landing member 6 at a position that fits around the wearer's waist.
FIG. 3 is a perspective view showing the shape of the unfolded disposable diaper 10 shown in FIG. 1 when viewed from the wearer's stomach side. By fastening the surface fastener 5b of the fastening tape 5 to the outer surface of the landing member 6, an annular waist opening Wo is formed on the upper side in the height direction of the wearer, and a pair of left and right legs around the wearer's legs Opening Lo is formed, forming a pants shape as a whole. Further, in the worn state, the front part F and the rear part R are connected to form the waistline part D, and the crotch intermediate part C is vertically provided so as to be along the crotch.

In the present embodiment, as shown in developed plan view in Figure 1, all of the buttock first elastic member 21 of the four is, extends along the gluteal cleft of the wearer indicated by the median plane cutting line P ₁ when worn Thus, it exists in the center part of the width direction of the absorptive main body 2, and has become a linear shape functionally organized as a whole. In this way, by making the first buttocks elastic member 21 linear as a whole, the absorbent main body can be brought closer to the wearer's urination portion, and since the urine is quickly absorbed by the absorbent body, Leakage can be prevented. Here it is not particularly limited, and the center in the width direction of the range, the effect of the buttocks first elastic member from the median plane cutting line P ₁ in the width direction (X direction) only to be defined functionally as a range.

FIG. 4 is an exploded plan view showing a disposable diaper 20 according to another preferred embodiment of the present invention. Thus buttocks first elastic member 21, so as to sandwich the median plane cutting line P ₁ of the wearer, have been made with a pair of parallel lines spaced two by two on both side portions in the width direction. As described above, the first main elastic member 21 is separated into a pair of parallel lines so that the absorbent main body can be brought closer to the wearer's crotch and the crotch gap is small. Therefore, leakage from the crotch portion when urinating can be prevented. In this case, the end part (inner end part) located inside the diaper of the heel part second elastic member 41 and exhibiting stretchability does not depend on the absorbent core, and the diaper length of the heel part first elastic member 21 is long. It is preferable to use the widthwise end portion of the absorbent core so that the stretchability in the direction is not inhibited as much as possible.

FIG. 5 is a schematic perspective view seen from the wearer's back for modeling and explaining the stretchability of each elastic member in the state where the diaper of FIG. 1 is worn.
As shown in FIG. 5, the diaper 10 and the wearer are pulled by the tension f ₁ that works upward in the direction of the crack line P ₁ due to the contraction of the buttocks first elastic member (crack-fit elastic member) 21. The gap with the crotch part 6 is reduced. Thereby, with respect to the conventional one that does not have the buttocks first elastic member, the performance of preventing the liquid leakage of excrement from the gap of this part and the sense of security at the time of wearing by appropriately fitting are significantly improved. . Moreover, in the diaper of the present embodiment, as shown in the figure, the heel second elastic member (groove fitting elastic member) 41 (41a, 41b) extends from the grooving portion to the left and right, and on both sides of the buttocks. Because it is arranged to support while wrapping up to the side, especially by slightly lifting the part that swells to the left and right at the bottom of the buttocks, the back part of the diaper fits firmly without leaving an extra gap . Then, further, the buttocks second elastic member 41 extends right and left along the Shirimizosen P _2, by pulling to open on both sides work tension f _2a and f _2b toward the widthwise outer, wearer When walking or turning over, it is possible to effectively prevent the buttocks first elastic member 21 from getting too much into the crack and resulting in poor comfort. That is, the tension f ₁ of the buttocks first elastic member 21 and the tensions f _2a and f _{2b of the} buttocks second elastic member 41 interact with each other so that the overall shape of the lower part of the diaper is suitable for the uneven shape of the wearer's buttocks. In addition, the elastic member does not bite into the crack portion of the buttocks, or even if it is extremely small, it is possible to achieve both anti-moisture performance and good comfort when worn for a long time.

In the present embodiment, as described above, the back portion 31 of the exterior body 3 is made sufficiently wide over the crotch that covers the wearer's buttocks, and the sides of the back portion 31 are side surfaces as viewed from behind the wearer. It has a pair of left and right collar second elastic members 41 (41a, 41b) arranged so as to open upward in the direction, that is, in an inverted “eight” shape. In addition, in FIG. 5, the direction of the force acting by the contraction of the buttocks first elastic member 21 is indicated by an arrow f ₁ as described above, and the direction of the force acting by the contraction of the buttocks second elastic members 41 a and 41 b is indicated by an arrow f _2a , Indicated by f _2b respectively. The force f ₁ acts in the direction along the fissure line P ₁ , and f _2a and f _2b act in the direction along the groin line P ₂ . f _2a and f _2b are equalized by equalizing the elongation ratio when the flange second elastic member 41 is installed. The forces f ₁ , f _2a , and f _2b can be combined in a well-balanced manner by setting the absorber gathers and hip gathers to the following elongation ratios, and can exhibit the fit that produces the above-mentioned moderate wearing feeling. .

  Moreover, it is preferable that the elongation rate (Eb) of the absorber gathers formed with the collar part 1st elastic member 21 is 20-200%, and 30-100% is further more preferable. As a method for increasing the elongation rate of the absorber gathers, means such as the fineness of the elastic member, the number of elastic members, and the expansion rate of the elastic member can be used. Moreover, it is preferable that the elongation rate of the hip gathers formed of the buttocks second elastic member 41 is 30 to 300%, and more preferably 50 to 100%. In addition, the expansion | extension rate of the collar part 2nd elastic member 41 is a site | part which expresses a stretching property, For example, in each embodiment demonstrated in this specification, it is a value in site | parts other than on an absorptive core. is there. The stretch rate (Eb) of the absorber gather and the hip gather here is the length when the stretched part is stretched until it stops stretching (A), where the stretched part has a naturally contracted length (A). When (B) is defined, it is defined as a percentage (%) calculated by ((B)-(A)) / (A).

  As each constituent material of the disposable diaper of this invention, the various materials normally used can be especially used without a restriction | limiting. For example, it is preferable that the sheet material used for the part in contact with the skin is a material having good touch, a nonwoven fabric, a cloth, or the like. As the absorbent core, for example, a fiber aggregate made of fibers such as defibrated pulp and crimped acetate fiber, or a core obtained by holding a water-absorbing polymer in the fiber aggregate is preferable. As the material of each elastic member, a normal elastic material used for an absorbent article can be used. For example, as a material, synthetic rubber such as styrene-butadiene, butadiene, isoprene, or neoprene, natural rubber, EVA, Examples include elastic polyolefin, polyurethane, etc. The shape of the cross-section is rectangular, square, circular, polygonal or other thread-like or string-like (flat rubber etc.), or multifilament type thread-like Can be used. As a male member and a female member of a mechanical fastener, known mechanical fasteners such as “Magic Tape (registered trademark)” (manufactured by Kuraray), “Quicklon (registered trademark)” (manufactured by YKK), “Majikurosu ( (Registered trademark) "(manufactured by Kanebo Bell Touch Co., Ltd.) and the like can be used. Further, by forming the outer surface of the absorbent main body 2 from a material that can directly engage with the male member of the mechanical fastener, for example, a non-woven fabric that is rich in engagement, this can be used in place of the landing member 6.

  In the above embodiment, the tape-fastening diaper has been described as an example, but the present invention may be a pants-type diaper as shown in FIG. In the embodiment of FIG. 6, in the configuration of the tape diaper shown in FIG. 1 described above, the side flap portion of the front portion F and the side flap portion excluding the fastening tape portion 5 of the rear portion R are overlapped in a palm shape. The pants-type diaper 30 is configured by joining with a heat melting means or the like to form a pair of side seal portions 46.

  The disposable diaper of this invention is not restrict | limited to embodiment mentioned above, A various change is possible in the range which does not deviate from the meaning of this invention. For example, instead of a mechanical hook-and-loop fastener, an adhesive part formed by applying an adhesive can be provided. The disposable diaper of the present invention is suitable for adults, but may be for infants. Moreover, although the said form was demonstrated with the expansion | deployment type diaper of a tape stop, a pants type diaper may be sufficient.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to this.

[Example 1]
A pants-type disposable diaper having the form shown in FIG. 6 was produced. The elongation rate (Eb) of the absorber gathers formed by the four collar first elastic members 21 used is 70%, and each of the two collar second elastic members 41 is finely cut on the absorbent core. As a result, the stretch rate of each of the left and right hip gathers, which were processed so as not to exhibit the stretchability and formed to exhibit stretchability other than on the absorbent core, was 90%.

[Example 2]
A disposable diaper was manufactured in the same manner as in Example 1 except that the two first buttocks elastic members 21 were arranged on the side part as shown in FIG.

[Reference Example 1]
A pants diaper was manufactured in the same manner as in Example 1 except that the buttocks first elastic member was not provided.

[Reference Example 2]
A disposable diaper was manufactured in the same manner as in Example 1 except that the buttocks second elastic member was not provided.

[Evaluation of crotch fit]
As shown in the explanatory view of the schematic front view of FIG. 7, the model doll 61 is fitted with the disposable diapers 62 of Examples 1 and 2 and Reference Examples 1 and 2, and the vertical diaper exterior from the crotch recess The distance L to the body surface was measured. Retreating to each measurement, the upper end 63 of the diaper 62 was set at the same position of the doll. The results are shown in Table 1.

[Evaluation of wearing feeling]
Subjects were asked to wear the diapers of Examples 1 and 2 and Reference Examples 1 and 2, and the comfort was evaluated. There is no bite by the absorber gathers in the ruptured part or crotch part, even if it is very small and there is good wearing feeling `` ○ '', there is a bite by the absorber gather in the cracked part or groin part, What produced the discomfort during mounting was evaluated by "x".

[Liquid leakage prevention evaluation]
The model doll 66 provided with the urination point 65 was fitted with the diapers 67 of the pants-shaped Examples 1-2 and Reference Examples 1-2, and the model doll 66 was tilted at an inclination angle of 30 degrees. FIG. 8 is an explanatory view of this state as viewed from the crotch side. From the excretion point 65 provided in the model doll 66, physiological saline was excreted at an excretion amount of 50 g / time and an excretion rate of 5 g / s. After this excretion was repeated at intervals of 5 minutes, the amount of liquid absorbed was measured by subtracting the amount leaked from the total excretion until the physiological saline leaked from the diaper. The test was conducted at 25 ° C.
The results are shown in Table 2. The unit of liquid absorption is g.

  As shown in Tables 1 and 2, in Examples 1 and 2, the distance (L) between the diaper and the model crotch is short and sufficient by providing the buttocks first elastic member and the buttocks second elastic member. Absorption amount was obtained, and the elastic member was suppressed from biting into the crevice crotch and crotch, and it was excellent in comfort and was able to achieve both excellent leakage prevention and wearing feeling.

It is an expansion | deployment top view which shows the state which looked at the disposable diaper (tape stop diaper) as one preferable embodiment of this invention from the skin contact surface side. FIG. 3 is a schematic cross-sectional view taken along line ZZ in FIG. It is the perspective view which looked at the state which the diaper of FIG. 1 wore from the ventral side. It is an expansion | deployment top view of the disposable diaper as another preferable embodiment of this invention. It is the schematic perspective view which looked at the state equipped with the diaper of FIG. 1 from the back side. It is the perspective view which looked at the state which the disposable diaper (pants type diaper) as another preferable embodiment of this invention was worn from the ventral side. It is explanatory drawing of the crotch part fitting state evaluation test of an Example. It is explanatory drawing of the liquid-leakage prevention evaluation test of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 20, 30 Disposable diaper 2 Absorbent main body 3 Exterior body 5 Fastening tape 6 Landing member 7 Human body 21 Buttocks first elastic member 22 Top sheet 23 Back sheet 24 Absorbent core 31 Back side part 41 Buttocks second elastic member 42 Waist Elastic member 43 Girth elastic member 44 Three-dimensional gather elastic member 45 Leg gather elastic member 46 Side seal part 61 Model doll 62 Disposable diaper 65 Urination point 66 Model doll 67 Disposable diaper

Claims (6)

It has a front part and a rear part, has an absorptive core extending from the front part to the rear part, and has a longitudinal direction extending from the front part to the rear part in the unfolded state, and a width direction perpendicular thereto. Disposable diapers,
The flange first elastic member extending in the longitudinal direction, which is present on the skin non-contact surface side with respect to the absorbent core, and the collar first elasticity in the plan view from the front portion side toward the rear portion side in the plan view. A pair of flange second elastic members disposed only in the rear part, which are separated from both sides in the width direction from both sides of the member, and the flange second elastic members are on the flange first elastic member on the absorbent core. Then, disposable diapers that are designed not to exhibit elasticity.   The disposable of Claim 1 provided with the back surface sheet | seat arrange | positioned from the said absorptive core to the skin non-contact surface side, and the said collar part 1st elastic member interposed between the said absorptive core and this back surface sheet. Diapers. The disposable diaper according to claim 1 or 2, wherein the first buttocks elastic member extends linearly along a wearer's crack. The disposable diaper according to any one of claims 1 to 3, wherein a plurality of the buttocks first elastic members are arranged in parallel at the position of the wearer's median plane. The disposable diaper according to any one of claims 1 to 3, wherein the first buttocks elastic member is spaced apart at a position of the wearer's median surface to form a pair of parallel lines. The disposable diaper according to any one of claims 1 to 5 , wherein an elongation rate (Eb) of the absorber gathers formed by the buttocks first elastic member is 20 to 200%.

Images