JP4130057B2 - Absorbent articles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an absorbent article such as a disposable diaper having excellent fit, absorption performance and leakage prevention performance.
[0002]
[Prior art and problems to be solved by the invention]
Conventionally, as an absorbent article, a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between both sheets are provided, and the width direction of the ventral side and / or the back side is provided. In addition, a disposable diaper in which a plurality of waist circumference elastic members are arranged at predetermined intervals is known.
By providing such an elastic member around the trunk, it is possible to improve fit around the trunk and to improve leakage prevention performance.
However, on the other hand, the absorbent body may be shrunk or twisted during wearing, and the absorbent performance inherent in the absorbent body may not be sufficiently exhibited, and the appearance may be deteriorated.
[0003]
In order to avoid these inconveniences, it is conceivable to dispose the waist circumference elastic member only outside the side edges of the absorber. For example, a method is conceivable in which the waist circumference elastic member is continuously arranged in the width direction of the abdominal side and / or the back side, and this is cut on the absorbent body and divided into left and right.
However, when using an elastic member with a large stretching stress such as thick thread rubber or an elastic member with poor adhesion such as natural rubber with talc adhering to the surface, by cutting, during production or mounting, When the rubber is removed, the stretched state is released, and the fit around the waist may be impaired, or the leakage prevention performance may be lowered.
Further, when an elastic member having a small expansion / contraction stress is used, there is a risk that the tightening force around the waist is insufficient, and the fit around the waist is impaired, or the leakage prevention effect is lowered. In addition, when an elastic member having a small expansion / contraction stress is disposed at a high elongation rate, adhesiveness with a sheet such as a nonwoven fabric holding the elastic member is lowered.
[0004]
In addition, if the amount of the adhesive for fixing the elastic member is increased in order to prevent the rubber from coming off, the flexibility is reduced by a large amount of the adhesive, and the elastic properties of the elastic member are hindered and the fit is reduced. Furthermore, there is a possibility of physically stimulating the wearer's skin. Further, the adhesive oozes out from a sheet such as a non-woven fabric sandwiching the elastic member, which may cause discomfort due to stickiness and further cause blurring.
[0005]
Accordingly, the object of the present invention is to freely determine the elongation stress of the elastic member around the trunk and the arrangement elongation ratio so that an appropriate tightening force can be obtained at the time of product development, and the flexibility of the trunk is deteriorated. An object of the present invention is to provide an absorbent article such as a disposable diaper that can improve fit, absorption performance, and leakage prevention performance without inconvenience such as irritation to the skin and skin.
[0006]
[Means for Solving the Problems]
The present invention includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between the two sheets, and has a ventral part, a dorsal part, and a crotch part, In an absorbent article in which a plurality of waist circumference elastic members are arranged at predetermined intervals in the width direction of the side portion and / or the back side portion, the waist circumference elastic member is located at a portion where the absorber exists. The elastic stretchability is not expressed, and the outer sides of the side edges of the absorber are fixed to the constituent material of the absorbent article by the first fixing means so as to exhibit the elastic stretchability. The trunk periphery elastic member is formed of an absorbent article fixed to a constituent material of the absorbent article by a second fixing means in the vicinity of a boundary between a portion that does not exhibit elastic stretchability and a portion that exhibits elastic stretchability. By providing, the above-mentioned purpose is achieved.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on preferred embodiments thereof.
The disposable diaper 1 which is 1st Embodiment of the absorbent article of this invention is a pants-type disposable diaper, and as shown to FIG. 1 and 2, a liquid-permeable surface sheet 2, a liquid-impermeable back sheet 3 and a liquid-retaining absorbent 4 interposed between both sheets 2 and 3, located between the abdominal side A disposed on the abdomen of the wearer and the back side B disposed on the dorsal side The side edges A1, A2 of the abdominal side A and the side edges B1, B2 of the back side B are joined by known joining means such as heat sealing, high frequency sealing, and ultrasonic sealing. Thus, a pair of leg openings 7 and a waist opening 8 are formed.
[0008]
The disposable diaper 1 includes an absorbent main body 10 including a top sheet 2, a back sheet 3, and an absorbent body 4, and an outer layer body 5 that is located outside the absorbent main body 10 and is bonded and fixed to the absorbent main body 10. It consists of.
[0009]
The absorbent main body 10 has a vertically long rectangular shape, and its longitudinal direction is made to coincide with the longitudinal direction of the disposable diaper, that is, the direction connecting the abdominal part A and the back part B in a state where the diaper 1 is flattened. Thus, the outer layer body 5 is joined to the central portion by a known joining means. The absorber 4 has an hourglass shape with a central portion in the longitudinal direction, and is sandwiched and fixed between the top sheet 2 and the back sheet 3.
A solid guard 6 having a free end on the inner side in the width direction of the absorbent main body 10 and a fixed end on the outer side is provided on both left and right sides of the absorbent main body 10 in the longitudinal direction. A plurality of three-dimensional guard elastic members (only one is shown) 61 are fixed to each three-dimensional guard 6 so as to be extendable and retractable. As a result, the three-dimensional guard 6 stands up, and the liquid in the width direction of the absorbent main body 10 flows. Outflow is prevented.
[0010]
A waist elastic member 81 for forming waist gathers is disposed in the waist opening 8 so as to be stretchable along the edge of the opening. More specifically, a plurality of waist elastic members are arranged along the respective edges at the front and rear end portions of the outer layer body 5, and the waist opening portions are formed by these waist elastic members 81. 8, an annular waist gather that is substantially continuous over the entire periphery of the periphery.
[0011]
In the disposable diaper 1 of the present embodiment, a plurality of waist circumference elastic members 9 are arranged at predetermined intervals in the width direction of the diaper 1 on the waist circumference D in each of the abdominal side A and the back side B. . The waist circumference portion D is a portion located below the position where the waist elastic member 81 is disposed and above the crotch portion (portions having concave notches for forming leg openings on both sides) C.
Each trunk periphery elastic member 9 is disposed between the two sheet materials 51 and 52 constituting the outer layer body 5.
[0012]
And each trunk | drum circumference part elastic member 9 is made so that elastic stretchability may not be expressed in the site | part in which the absorber 4 exists, and as the 1st fixing means on the outer side of the both-sides edges 41 and 41 of this absorber 4. The adhesive G is fixed in an extended state to the outer layer body 5 as a constituent material of the absorbent article so as to exhibit elastic stretchability.
That is, the trunk periphery elastic member 9 is divided into left and right, and the trunk periphery elastic member 9 does not exist in a portion where the absorber 4 is present (a portion disposed so as to overlap the absorber 4). Or even if it exists, it is not fixed to the outer layer body 5 and does not exhibit elastic stretchability. On the other hand, outside the both side edges 41, 41 of the absorbent body 4, like a conventional diaper having a trunk periphery elastic member, it is fixed to a constituent material of the diaper and exhibits an elastic shrinkage.
[0013]
The trunk periphery elastic member 9 has a portion that is not fixed to the outer layer body 5 at a portion that overlaps the absorber 4, and is cut at the center of the portion that is not fixed to the outer layer body 5. It is divided.
In addition, the trunk periphery elastic member 9 in the portion that exhibits elastic contractility is bonded and fixed to one or both of the two sheet materials 51 and 52 constituting the outer layer body 5.
[0014]
In this specification, the expression of elastic stretchability means that the elastic member is disposed, but the elastic member has been released from the extended state, or the elasticity of the elastic member has disappeared due to heat treatment or the like. The meaning includes both the case where the elastic stretchability is not exhibited and the case where the elastic member is not present in the portion.
Further, the elastic member is divided means that the elastic member elastically stretchable part is divided through the elastic member non-elastically elastic part. It is preferable that
[0015]
The waist circumference elastic member 9 in the disposable diaper 1 of the present embodiment is arranged on a portion where the absorber 4 is present and does not exhibit elastic stretchability, and on the outer sides of the left and right side edges of the absorber 4. The vicinity of the boundary with the portion exhibiting elastic elasticity is fixed to the outer layer body 5 as a constituent material of the absorbent article more firmly than the fixing portion by the adhesive G as the first fixing means by the second fixing means. ing.
The 2nd fixing means in this embodiment is a heat seal, and the location which gave the heat seal as a 2nd fixing means is shown by code | symbol S1 in FIG. As shown in the figure, in the disposable diaper of the present embodiment, the waist circumference elastic member 9 is bonded to one or both of the two sheets 51 and 52 by the adhesive G as the first fixing means. And the non-adhesive region P2 that is located between the bonding regions P1 and is not bonded to either of the two sheets 51 and 52, and the peripheral region elastic member 9 is bonded In the vicinity of the boundary between the region P1 and the non-bonded region P2, more specifically, in the bonded region P1, near the boundary line between the two regions (indicated by the alternate long and short dash line P in FIG. 2), the diaper 1 It is being fixed to the outer layer body 5 as a constituent material.
[0016]
The fixing portion fixed to the outer layer body 5 by heat sealing as the second fixing means in each of the trunk periphery elastic members 9 is more absorbable than the fixing portion fixed only by the adhesive as the first fixing means. It is fixed to the component of the article.
[0017]
In addition, fixing by heat sealing as the second fixing means is performed such that both the sheet materials 51 and 52 are fused to each other, and the trunk periphery elastic member is sandwiched and fixed between the two sheet materials, or the elastic member and one side or both sides This is achieved by fusing the sheet material.
[0018]
The first fixing means in the present invention is means for fixing the trunk periphery elastic member to the constituent material (preferably sheet material) of the absorbent article in a state where the elastic stretchability can be expressed. , Adhesives, heat seals (including ultrasonic seals), and the like, and adhesives are preferred as in this embodiment. As the adhesive as the first fixing means, various known adhesives can be used, but hot melt adhesives are preferable, and SEBS, SBS, and SIS hot melt adhesives are particularly preferable. The adhesive application pattern is preferably applied directly to the elastic member, but is not particularly limited to stripes, spirals, solids, dots, and the like.
[0019]
Further, the second fixing means is for fixing the waist circumference elastic member to the constituent material of the absorbent article more firmly than the fixing part by the first fixing means, that is, the part fixed only by the first fixing means. This means is usually different from the first fixing means or the same means as the first fixing means, but is applied so as to obtain a stronger fixing strength than the first fixing means.
[0020]
Examples of fixing means applied so as to obtain a stronger fixing strength than the first fixing means include physical properties of the second fixing means itself such as an adhesive having an adhesive strength stronger than the adhesive used as the first fixing means. In addition to those that provide stronger fixing strength than the first fixing means depending on the characteristics, for example, an adhesive that is additionally applied to the fixing portion by the adhesive as the first fixing means or an adhesive as the first fixing means In addition, an adhesive applied at a high basis weight or the like, which is applied in a mode different from the first fixing means, can obtain a fixing strength stronger than that of the first fixing means.
The second fixing means is usually applied in a step different from the step of applying the first fixing means (preferably a step after the step of the first fixing means).
[0021]
As the second fixing means, the same one as the first fixing means can be used.
As a preferable combination of the first and second fixing means, (1) the first fixing means is an adhesive, and the second fixing means is a combination of heat sealing (including ultrasonic sealing), or (2) the first fixing means. And the second fixing means are both adhesives, and the second fixing means is applied so as to obtain stronger bonding strength than the first fixing means. When heat sealing is used as the second fixing means, there is an advantage that no material cost is required, and when fixing means using an adhesive is used, there is an advantage that more effective conditions can be easily obtained by adjusting the coating amount. is there.
[0022]
When the first fixing means is an adhesive and the second fixing means is heat sealing (including ultrasonic sealing), the first fixing is performed on one of the two sheet materials 51 and 52 constituting the outer layer body 5. It is preferable to apply an adhesive as a means, and then sandwich the waist portion elastic member 9 between the sheet materials 51 and 52, and then seal between the upper and lower surfaces of the sheets 51 and 52.
[0023]
In addition, when both the first fixing means and the second fixing means are adhesives, an adhesive as the first fixing means and one of the two sheet materials 51 and 52 constituting the outer layer body 5 and After applying both adhesives as the second fixing means, the trunk periphery elastic member 9 is disposed on the sheet material coated with these adhesives, and then the other elastic member 9 is placed on the cylinder periphery elastic member 9. A method of arranging the sheet material, or after applying an adhesive as a first fixing means to one of the two sheet materials 51, 52, the trunk periphery elastic member 9 is disposed, and then the cylinder periphery elastic A method of applying an adhesive as the second fixing means on the member 9 or the other sheet material and arranging the other sheet material on the waist circumference elastic member 9 is preferable.
[0024]
In addition, it is preferable that the location which apply | coats the adhesive agent as a 2nd fixing means is the same as the location which performed the heat seal in this embodiment. Moreover, what is necessary is just to use various well-known coating apparatuses and positioning apparatuses in order to apply the adhesive agent as a 2nd fixing means to the selected specific site | part.
[0025]
In the disposable diaper 1 of the present embodiment, the pair of leg portions 70, 70 arranged around the wearer's legs are crossed from the one leg portion 70 across the crotch C to the other leg portion 70. The leg part elastic member 71 for forming leg gathers is arranged, and the leg part elastic member 71 is made so as not to exhibit elastic stretchability in a portion where the absorber 4 is present. Outside the edges 41, 41, they are fixed to the outer layer body 5 as a constituent material of the absorbent article so as to exhibit elastic stretchability.
[0026]
This disposable diaper 1 has, as leg elastic members 71, first elastic members 71a whose both end portions are located on the ventral side portion A and second elastic members 71b whose both end portions are located on the back side portion B. Yes. Both ends of each of the first and second elastic members 71a and 71b are located at both side edges of the ventral side A or the back side B, and the back side edges A1 and A2 of the ventral side A of the diaper 1 In a state where both side edges B1 and B2 of the side part B are joined to each other, as shown in FIG. 1, substantially continuous with the peripheral parts of the leg openings 7 and 7 of the diaper 1 over the entire circumference. An annular leg gather is formed.
[0027]
Moreover, both elastic members 71a and 71b outside the side edges 41 and 41 of the absorbent body 4 are fixed to the outer layer body 5 as a constituent material of the absorbent article by the adhesive G as the first fixing means, Both elastic members 71a and 71b are heat-sealed as second fixing means (S2 in FIG. 2 is heat-sealed) in the vicinity of the boundary between the portion that does not exhibit elastic stretchability and the portion that exhibits elastic stretchability. Is fixed to the outer layer body 5 as a constituent material of the absorbent article more firmly than the fixing portion by the first fixing means.
[0028]
As the first and second fixing means for fixing the leg elastic member 71, the same means as the first and second fixing means for fixing the trunk periphery elastic member 9 can be used, respectively. Both elastic members 71 a and 71 b have a portion that is fixed to the outer layer body 5 and a portion that is not fixed, and are cut at a portion that is not fixed to the outer layer body 5. The leg elastic member 71 is introduced by swinging between the sheet materials 51 and 52 constituting the outer layer body 5. The points that are not particularly described with respect to the fixing method of the leg elastic member 71 are the same as those of the trunk periphery elastic member 9 including preferred aspects, and the above description regarding the trunk periphery elastic member 9 is appropriately applied.
[0029]
The forming material of the constituent member of the disposable diaper 1 of the present embodiment will be described. As the forming material of the top sheet 2, the back sheet 3, the absorbent body 4, the three-dimensional guard 6, the elastic member 61, and the waist elastic member 81. Conventionally, those used for disposable diapers and the like can be used without particular limitation.
[0030]
As the material for forming the waist circumference elastic member 9 and the leg elastic member 71, various known elastic materials can be used. Examples of the material include synthetic rubbers such as styrene-butadiene, butadiene, isoprene and neoprene, natural Elastic materials such as rubber, EVA, elastic polyolefin, and urethane can be widely used, and the form is preferably a thread-like or tape-like section having a rectangular, square, circular, or polygonal cross section. An elastic member having a property of being plasticized by heat is also preferably used.
[0031]
When fixing the waist circumference elastic member 9 and / or the leg elastic member 71 between the two sheet materials constituting the diaper, the shape material of the two sheet materials is both heat-sealed. In particular, a non-woven fabric containing a core-sheath type adhesive composite fiber (for example, a composite fiber of a PET core PE sheath), a non-woven fabric containing a side-by-side type adhesive composite fiber, a high melting point and a low melting point. A bicomponent non-woven fabric containing the synthetic fiber is preferable because a high fixing strength can be obtained due to high heat sealability.
In particular, as a forming material for fixing the trunk periphery elastic member 9 and / or the leg elastic member 71 between the two sheet materials 51 and 52 constituting the outer layer body, liquid resistance, liquid impermeability are preferable. It is a highly flexible sheet that has moisture permeability and breathability and is close to the underwear. Specifically, a woven fabric, a nonwoven fabric, a film, a moisture permeable film, a perforated film, a composite material thereof, and the like are preferable. .
[0032]
An example of the manufacturing method of the outer layer body 5 in the disposable diaper 1 of this embodiment is demonstrated with reference to FIG.
First, an adhesive as a first fixing means is applied in a predetermined pattern to at least one of the two sheet materials 51 and 52 constituting the outer layer body (coating process).
Specifically, as shown in FIG. 3A, an adhesive is intermittently applied at a predetermined interval in the flow direction X of the sheet material 51. Thereby, the application | coating part H1 and non-application | coating part H2 of an adhesive agent are alternately formed in the sheet material 51 over the flow direction X of a sheet | seat material.
[0033]
Next, after the trunk periphery elastic member 9 and the first and second elastic members 71a and 71b are introduced in an extended state so as to be intermittently fixed between the sheet materials 51 and 52 via an adhesive, respectively. The two sheet materials 51 and 52 are bonded together (introduction bonding step). Both elastic members 71a and 71b are introduced while being swung in a direction Y orthogonal to the flow direction X of both continuous sheets. In the example shown in FIG. 3, both sheet materials 51 and 52 are bonded together immediately after the introduction of these elastic members.
In this introducing and bonding step, both the sheet materials 51 and 52 are bonded to each other in the adhesive application portion H1 to form an adhesive region P1, and a non-adhesive region P2 in which the two continuous sheets are not bonded to each other is formed. The The trunk periphery elastic member 9 and the first and second elastic members 71a and 71b are fixed between the two sheet materials in the bonding region P1, and are not fixed between the two sheet materials in the non-bonding region P2. .
[0034]
Next, as shown in FIG. 3 (b), the trunk periphery elastic member 9 and the first and second elastic members 71a and 71b are cut at portions that are not fixed to the two sheet materials 51 and 52 (cutting step). Further, as shown in FIG. 3 (c), both sheet materials 51 are obtained by heat-sealing the predetermined portions of the cut body periphery elastic member 9 and both elastic members 71a and 71b as second fixing means. , 52 (fixing step). In FIG. 3, a portion indicated by S <b> 1 is a fixing portion by heat sealing of the trunk periphery elastic member 9, and a portion indicated by S <b> 2 is first and second elastic members 71 a and 71 b as leg elastic members 71. It is a fixing part by heat sealing in each.
[0035]
In the cutting step, various known cutting means can be used. For example, a pinch cutter, a rotary die cutter, a heat seal cutter, an ultrasonic cutter, a water jet cutter, or the like can be used.
[0036]
When heat sealing is used as the second fixing means in the fixing step, the heat sealing may seal the entire sealing area (solid sealing), but prevents the sealing area from becoming hard and feeling bad. From the viewpoint, it is preferable to partially seal with a predetermined pattern.
Heat sealing is usually performed by inserting the leg elastic member between a pair of seal rolls together with a sheet material for fixing the leg elastic member. The pair of seal rolls are preferably a pattern roll and a backup roll, and only one of the rolls may be a heating roll, or both may be heating rolls. By changing factors such as roll temperature, sealing time, clearance, pressure, etc., it is possible to process under optimum processing conditions for the material.
[0037]
Through such a process, a partially elasticized laminated sheet 50 is obtained.
The outer layer body 5 is obtained by cutting and removing the extra portion 72 for forming the leg portion from the laminated sheet 50 and cutting the laminated sheet 50 into the dimensions of the individual outer layer bodies 5. The fixing step may be performed before or simultaneously with the cutting step.
[0038]
In the disposable diaper 1 of the present embodiment, for example, the absorbent main body 10 manufactured according to a conventional method is bonded and fixed to the outer layer body 5 manufactured by the above-described method by a known bonding means, and both side edges A1 of the abdominal side A are further fixed. , A2 and both side edges B1 and B2 of the back side B are obtained.
[0039]
The disposable diaper 1 of this embodiment can be used in the same manner as a normal pants-type disposable diaper.
And according to the disposable diaper 1 of this embodiment, since the trunk | drum surrounding part elastic member 9 is distribute | arranged to the trunk | drum surrounding part D, the fit property in a wearer's circumference is improving and it is excellent also in the leak prevention performance. ing. In addition, since the waist circumference elastic member 9 does not exhibit elastic stretchability at the site where the absorber 4 is present, shrinkage or twisting of the absorber 4 during wearing is effectively prevented, and the absorber The absorption performance inherent in 4 can be sufficiently exhibited. Therefore, it is possible to reduce the size of the absorbent body 4 and reduce the materials used while maintaining sufficient absorption performance for the diaper 1.
In addition, since the absorber is not easily pleated, it has a clean appearance and the printed design is easy to see.
[0040]
Moreover, in the disposable diaper 1, since the predetermined | prescribed location of the trunk | drum circumference part elastic member is being fixed by the 2nd fixing means, as a trunk | drum circumference part elastic member, the elastic member with a big elongation stress, or a talc adheres to the surface. Even when an elastic member with poor adhesion, such as natural rubber, is used, no rubber is lost. Therefore, in order to obtain an appropriate tightening force around the waist, it is possible to appropriately determine the extension stress of the waist circumference elastic member and the arrangement extension rate thereof, and efficiently and economically fit and absorption performance, The leakage prevention performance can be improved.
Further, in the disposable diaper 1 of the present embodiment, unlike the case where the waist circumference elastic member is fixed only by the first fixing means, it is not necessary to use a large amount of adhesive, so that the flexibility of the large amount of adhesive can be reduced. There is no risk of lowering, adverse effects on the skin, or discomfort due to stickiness.
[0041]
Moreover, in this disposable diaper 1, since it is made for the leg part elastic member 71 not to express elastic stretchability in the part in which the absorber 4 exists, it is excellent in especially the fit property and absorption performance in the crotch part. . Moreover, since the leg elastic member 71 is also fixed by the first and second fixing means in the same manner as the trunk periphery elastic member 9, it is possible to more efficiently and economically fit, absorb, and prevent leakage. Improvements can be made.
[0042]
As mentioned above, although one Embodiment of this invention was described, this invention is not restrict | limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning of this invention.
For example, the trunk periphery elastic member may be disposed only on either the abdominal side or the back side. In addition, even in the case where it is arranged on the ventral part and the dorsal part, only in either the ventral part or the dorsal part, the trunk periphery elastic member is in the site where the absorber 4 exists, You may make it not express elastic elasticity.
[0043]
Moreover, although the trunk | drum surrounding part elastic member 9 in the said embodiment was distribute | arranged between the sheet | seat material (outer layer sheet | seat) 51 which forms the outermost surface of the diaper 1, and the sheet | seat material (inner layer sheet | seat) 52 inside it. The sheet constituting the outer layer body 5 is not limited to this, and is formed between the inner layer sheet 52 and the sheet material arranged on the inner side, between the other two sheet materials constituting the outer layer body 5, and the back sheet 3 and the outer layer body 5. You may distribute | arrange between materials.
[0044]
Moreover, the leg part elastic member 71 may be made to express elastic stretchability in the site | part in which the absorber 4 exists.
[0045]
Moreover, the part which expresses the elastic stretchability in the trunk periphery elastic member 9 may slightly overlap the part where the absorber 4 exists. Further, there may be a portion where the waist circumference elastic member 9 does not exhibit elastic stretchability outside the both side edges of the absorbent body 4.
[0046]
In addition to the boundary line between the portion that does not develop elastic stretchability and the portion that develops elastic stretchability, the portion around which the trunk periphery elastic member 9 is fixed by the second fixing means has elastic stretchability from the boundary line. The position may be a little away from the part side that does not develop or the part side that develops elastic stretchability.
[0047]
In addition, as a mode in which the trunk periphery elastic member 9 is configured not to exhibit elastic stretchability in the portion where the absorber 4 is present, the trunk periphery elastic member 9 is cut and fragmented at a plurality of locations. May be.
[0048]
The first fixing means for fixing the trunk periphery elastic member 9 and the first fixing means for fixing the leg elastic member 71 may be the same or different, and the same applies to the second fixing means.
[0049]
Moreover, you may provide the shielding sheet which shields the edge part produced by the cutting | disconnection of these elastic members in the cutting location of the trunk | drum surrounding part elastic member 9 and / or the leg part elastic member 71. FIG. The end portion of the elastic member generated by cutting is contracted to be non-functional, and the cut end may be seen through from the outside, or the outer layer sheet at the cut portion may be damaged and a hole may be formed. By providing a concealment sheet in that portion, the appearance is improved. In addition, as a material for forming the concealment sheet, a highly flexible sheet having a touch close to an underwear is preferable. Specifically, a woven fabric, a non-woven fabric, a film, a moisture permeable film, an apertured film, paper, a composite material thereof, and the like Is used.
[0050]
The present invention can be applied to unfolded disposable diapers provided with a pair of fastening tapes, pant-type sanitary napkins, and the like, in addition to pants-type disposable diapers.
[0051]
【The invention's effect】
According to the absorbent article of the present invention, at the time of product development, it is possible to freely determine the elongation stress of the waist circumference elastic member and the arrangement elongation rate so that an appropriate tightening force can be obtained around the waist, and the flexibility around the waist Fit, absorption performance, and leakage prevention performance can be improved without inconvenience such as deterioration of the skin and irritation to the skin.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a disposable diaper according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view showing a deployed state of the disposable diaper shown in FIG.
FIG. 3 is a diagram showing an outline of an example of a manufacturing process of an outer layer body in the disposable diaper shown in FIG. 1;
[Explanation of symbols]
1 disposable diapers
10 Absorbent body
2 Top sheet
3 Back sheet
4 Absorber
41 Side edges of absorber
5 outer layer
51 Sheet material (outer layer sheet)
52 Sheet material (inner layer sheet)
6 Solid Guard
61 Three-dimensional guard elastic member
7 Leg opening
70 legs
71 Leg elastic member
71a First elastic member
71b Second elastic member
8 Waist opening
81 Waist elastic member
9 Body elastic part
A ventral side
B back side
C Inseam

Claims (5)

A liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between the two sheets, having a ventral part, a dorsal part, and a crotch part; Or in the absorbent article in which a plurality of waist circumference elastic members are arranged at a predetermined interval in the width direction of the back side,
The body-surrounding portion elastic members is arranged along the width direction of the absorbent article at the site where the absorbent body is present are made not to express elastically stretchable by the cutting of the elastic member, the absorber In the outer side of the both side edges, the first fixing means is fixed to the constituent material of the absorbent article so as to express elastic stretchability,
The trunk periphery elastic member is fixed to the constituent material of the absorbent article by the second fixing means in the vicinity of the boundary between the portion that does not exhibit elastic stretchability and the portion that exhibits elastic stretchability .
The trunk periphery elastic member is an absorbent article in which a portion fixed by the second fixing means is fixed to the constituent material of the absorbent article more firmly than a portion fixed by the first fixing means .   The absorbent article according to claim 1, wherein the first fixing means is an adhesive and the second fixing means is a heat seal. First fixing means and the second fixing means are both adhesive,
The second fixing means is an adhesive having a stronger adhesive force than the first fixing means, an adhesive applied to the fixing portion by the first fixing means, or an adhesive applied with a higher basis weight than the first fixing means. The absorbent article of Claim 1 which is an agent .   Leg leg elastic members for leg gather formation are arranged in a pair of leg parts arranged around the legs of the wearer so as to cross the crotch from one leg part to the other leg part, The leg elastic member is not elastically stretchable in a portion where the absorber is present, and is elastically fixed to the constituent material of the absorbent article outside the side edges of the absorber. The absorptive article according to any one of claims 1 to 3 which expresses elasticity.   The leg elastic member outside the both side edges of the absorbent body is fixed to the constituent material of the absorbent article by the first fixing means, and the leg elastic member is elastic with a portion that does not exhibit elastic stretchability. The absorbent article according to claim 4, wherein the absorbent article is fixed to the constituent material of the absorbent article by the second fixing means in the vicinity of the boundary with the portion exhibiting stretchability.

Images