JP5549252B2 - Tape type disposable diaper - Google Patents

Description

  The present invention relates to a tape-type disposable diaper. More specifically, when the front and back diapers of the diaper are fixed with fastening tape, the side flaps can expand and contract in an appropriate state to match the wearer's body line, and a good wearing feeling can be obtained. The present invention relates to a disposable tape-type diaper.

  In general, a tape-type disposable diaper is composed of respective parts of a front body 2, a crotch part 4 and a back body 6 as in a tape-type disposable diaper 100 shown in FIG. Is provided with an absorbent main body 14 laminated in a sandwiched state, and a fastening tape 110 for fixing the front body 2 and the back body 6 (see, for example, Patent Document 1). The tape-type disposable diaper 100 includes side flaps 108 extending from both side edges of the back body 6 of the absorbent main body 14, and a fastening tape 110 is disposed at the tip of the side flap 108.

  According to such a tape-type disposable diaper 100, the excrement of the wearer is absorbed by the absorbent body 22 through the liquid-permeable portion of the sheet 18 constituting the absorbent main body, and is usually liquid-free. Leakage to the outside is prevented by the sheet 20 made of a permeable material, and excrement can be held inside the diaper. Further, by fixing the front body 2 and the back body 6 of the diaper to each other with the fastening tape 110, there is also an advantage that the wearer can easily attach the diaper.

  When wearing a diaper, the fastening tape 110 disposed at the tip of the side flap 108 is moved to the front body 2 side, and is fastened to the secured portion disposed on the front body of the absorbent main body 14. As a result, the front body 2 and the back body 6 of the diaper are fixed. Usually, the side flap 108 is made of non-woven fabric or the like as its material. Therefore, when the fastening tape 110 is stretched to the front body 2 side, the side flap 108 is stretched in the tensile direction of the fastening tape 110 and worn. A person's waist can be fixed. Further, since the side flaps 108 are stretchable in the direction around the waist, it is possible to prevent the waist circumference from becoming too tight.

JP 2003-275244 A

  However, since such a side flap is formed of a uniform material sheet as a whole, it has a certain degree of elasticity in the direction around the waist, but from the wearer's torso to around the leg. For body lines, there was a problem that sufficient fit could not be obtained. That is, the wearer's body line generally has a large dimensional change on the waist side (that is, around the waist), while the dimensional change is small on the leg side (for example, below the waist). There is a problem that the stretchability of the side flap cannot follow the body line having such a dimensional change, and a gap is formed between the wearer and the side flap.

  Further, in the tape-type disposable diaper 100 having the side flap 108 and the fastening tape 110 as shown in FIG. 18, when the fastening tape 110 is pulled, the width of the fastening tape 110 is applied to the side flap 108. Since the tensile stress is transmitted, when the width of the side flap 108 is wider than the width of the fastening tape 110, the side edge portion of the side flap 108 is not pulled and looseness occurs. Further, in order to prevent the side flap 108 from slacking as described above, the fastening tape 110 must be pulled and tightened with a greater force, and the wearing feeling of the diaper is significantly deteriorated. was there.

  The present invention has been made in order to solve such a problem of the prior art, and when the front body and the back body of the diaper are fixed by a fastening tape, the side of the body is aligned with the line of the wearer's body. The present invention provides a tape-type disposable diaper in which a flap can be expanded and contracted in an appropriate state to obtain a good wearing feeling.

  As a result of intensive studies to solve the problems of the prior art as described above, the present inventor has determined that the side flap to which the fastening tape is connected is connected to the side edge portion on the crotch side and the side on the back body end side. The present invention has been completed by conceiving that the above-mentioned problems can be solved by configuring the edge portion to have different extension stresses in the tensile direction of the fastening tape. Specifically, the following tape-type disposable diapers are provided by the present invention.

[1] An absorbent main body composed of a front body, a crotch part, and a rear body, and a plurality of sheets stacked in a state of sandwiching an absorbent body, and extending from both side edges of the rear body of the absorbent main body A side flap, a fastening tape for fixing the front body and the back body, disposed at the front end portion of the side flap, and a guard disposed on the front body of the absorbent main body. includes a deposition zone, and a fixable configured tape type disposable diaper wherein the fastening tape within the object fastening region, said side flap along the side edges of the back body end side A stretchable elastic body arranged in parallel, and an extension stress Pb in a tension direction of the fastening tape at a side edge portion on the crotch part side of the side flap is a side of the side flap on the rear body end side In the edge portion, the fastening te -Loop tensile than tensile stress Pa in the direction such are configured to be larger Rutotomoni, in the central portion in the width direction of the side flaps, expansion stress Pc in the pulling direction of the fastening tape is, the back body Of the side edge portion on the side of the end portion of the crotch portion, and the extension stress Pb on the side edge portion on the crotch portion side. Fixing over each of the side edge part of the crotch part side of the side flap, the center part in the width direction of the side flap, and the side edge part of the side flap on the rear body end side in the tip part. tape-type disposable diapers that have been.

[2] the side flaps, tape type disposable diaper according to [1] comprising said stretchable elastic member having two or more different elastic modulus.

[3] The tape-type disposable diaper according to [2], wherein the elastic elastic body is formed in a film shape.

[4] The tape-type disposable diaper according to [2] or [3], wherein the stretchable elastic body is stuck to a sheet constituting the side flap in an extended state.

[5] The side flaps are in said stretchable elastic body comprise becomes, the side edge portions of the back body end side to the crotch portion side side edge portion of which has the same modulus of elasticity, the stretch elastic body, The tape-type disposable diaper according to [1], wherein the disposable diaper is attached to a sheet constituting the side flap in different stretched states.

[6] The side flaps may comprise the stretch elastic body having the same elastic modulus, the elongation elastic body, than the side edge portions of the back body end portions, the side edges of the crotch portion The tape-type disposable diaper according to [1], wherein a large amount is arranged.

[7] The side flaps may comprise a film of the stretchable elastic material having the same elastic modulus, the film-like to form the the stretched elastic body, two or more layers to the side edges of the crotch portion The tape-type disposable diaper according to [1], wherein the disposable diaper is disposed in a stacked state.

[8] The stretch stress Pa at 50% elongation in the side edge portion on the end side of the back body is 1.5 to 4 N / 25 mm, according to any one of [1] to [7]. Tape-type disposable diaper.

[9] The tape according to any one of [1] to [8], wherein the extension stress Pb at 50% extension in the side edge portion on the crotch part side is 2.5 to 7.5 N / 25 mm. Type disposable diaper.

[10] The [1] to [9], wherein the side flap is configured such that at least a part of a side edge part on the crotch part side and a side edge part on the rear body end part side are separated. ] The tape-type disposable diaper in any one of.

[11] The side flaps may comprise a film of the stretchable elastic material having two or more different elastic modulus, at the center portion in the width direction, overlap at least a portion of two or more of the stretchable elastic member The tape-type disposable diaper according to any one of [1] to [10], wherein the disposable diaper is disposed in a state where the tape is disposed.

[12] The side flaps may comprise the stretch elastic body having the same modulus of elasticity, the stretch elastic body, said side edges of said back body end portion side and the crotch portion side side edge portion of the width The tape-type disposable diaper according to any one of [1] to [10], wherein the tape is attached to a sheet constituting the side flap in a different stretched state at a central portion in the direction.

[13] The side flaps may comprise the stretch elastic body having the same elastic modulus, the elongation elastic body, than the side edge portions of the back body end portions, the side edges of the crotch portion The tape mold according to any one of [1] to [10], in which a large amount is disposed and a larger amount is disposed in a central portion in the width direction than a side edge portion on the crotch part side. Disposable diapers.

[14] The side flaps may comprise a film of the stretchable elastic material having the same elastic modulus, the elongation elastic body formed on the film shape, the side edges of the crotch portion side, two-layer It is arrange | positioned in the state laminated | stacked above, and it is arrange | positioned in the state laminated | stacked on the side edge part of the said crotch part side in three or more layers , In any one of said [1]-[10]. Tape-type disposable diaper.

[ 15 ] The tape-type disposable diaper according to any one of [ 1 ] to [ 14 ], wherein the extension stress Pc at 50% extension in the central portion in the width direction is 4 to 11.5 N / 25 mm.

[ 16 ] The side flap includes at least a part of a side edge part on the crotch part side and a central part in the width direction, and a side edge part on the rear body end side and a central part in the width direction. The tape-type disposable diaper according to any one of the above [ 1 ] to [ 15 ], which is formed with a slit to be separated.

[ 17 ] The side flap is separated from the side edge part on the crotch part side where the tensile stress Pb is large and the side edge part on the rear body end part side where the tensile stress Pa is small. The width direction center is formed by overlapping a part of the side edge part on the crotch part side and the side edge part on the back body end side in the center part in the width direction of the side flap. The tape-type disposable diaper according to any one of [1] to [10], wherein the extension stress Pc in the portion is configured to be greater than the extension stress Pa and the extension stress Pb.

  The tape-type disposable diaper of the present invention has a fastening tape in which the tensile stress Pb in the tensile direction of the fastening tape in the side edge portion on the crotch lower side of the side flap is the side edge portion on the rear body end side of the side flap. Therefore, when the front body and the back body of the diaper are fixed with a fastening tape, the side flaps match the line of the wearer's body. It expands and contracts in an appropriate state, and a good wearing feeling can be obtained. For this reason, the stretchability of the side flap can be satisfactorily followed according to the line of the wearer's body, and excessive tightening due to the side flap, loosening of the side edge portion of the side flap, etc. can be made difficult to occur. .

  Further, in the tape-type disposable diaper of the present invention, the tensile stress in the tension direction of the fastening tape at the center portion in the width direction of the side flaps, the tensile stress at the side edge portion on the end side of the back body, and the crotch side By constructing it so as to be larger than the tensile stress at the side edge portion of the side flap, it is possible to further prevent the side edge portion of the side flap from becoming loose.

  In the tape-type disposable diaper of the present invention, the side flap is configured so that at least a part of the side edge part on the crotch part side and the side edge part on the rear body end part side is separated. Thus, the above-described effects can be expressed more effectively.

Is a plan view showing one embodiment of a tape type disposable diaper, expand the tape type disposable diaper is a view showing a state viewed from the top sheet side. It is the enlarged plan view which expanded the side flap of the tape type disposable diaper shown in FIG. Is a plan view showing an example of a side flap of tape-type disposable diaper. It is a top view which shows the preparation methods of a test piece at the time of measuring the extensional stress in the tension direction of the fastening tape of a side flap. It is a top view for demonstrating the measuring method of an extensional stress. It is a top view for demonstrating the measuring method of an extensional stress. It is a top view for demonstrating another example of the measuring method of an extensional stress. It is a top view which shows the preparation method of a test piece at the time of measuring the extensional stress in the tension direction of a fastening tape in the center part of the width direction of a side flap. It is a plan view showing another example of the side flaps of the tape type disposable diaper. Is a plan view showing still another example of the side flaps of the tape type disposable diaper. Is a plan view showing still another example of the side flaps of the tape type disposable diaper. Is a plan view showing still another example of the side flaps of the tape type disposable diaper. Is a plan view showing still another example of the side flaps of the tape type disposable diaper. It is a top view which shows the further another example of the side flap of the tape-type disposable diaper of this invention. It is a top view which shows the further another example of the side flap of the tape-type disposable diaper of this invention. It is a top view which shows the further another example of the side flap of the tape-type disposable diaper of this invention. It is a top view which shows the further another example of the side flap of the tape-type disposable diaper of this invention. It is a top view which shows the further another example of the side flap of the tape-type disposable diaper of this invention. It is a top view which shows the further another example of the side flap of the tape-type disposable diaper of this invention. It is a schematic diagram which shows the A-A 'cross section of FIG. 17A. It is a top view which shows the conventional tape-type disposable diaper, and is a figure which shows the state which expand | deployed the tape-type disposable diaper and was seen from the top sheet side.

  Hereinafter, the form for implementing the tape type disposable diaper of this invention is demonstrated concretely. However, the present invention broadly encompasses tape-type disposable diapers having the invention-specific matters, and is not limited to the following embodiments.

  In the present specification, the “tape-type disposable diaper” is composed of a front body 2, a crotch part 4 and a back body 6, like the tape-type disposable diaper 1 shown in FIG. 20 is disposed on the absorbent body 14 laminated with the absorbent body sandwiched, the side flaps 8 extending from both side edges 6a and 6b of the back body 6 of the absorbent body 14, and the tip of the side flap 8 The tape-type disposable diaper 1 provided with the fastening tape 10 for fixing the front body 2 and the back body 6 which were provided shall be meant.

  In addition, in this specification, “front body” means a part that covers the abdomen (front of the body) of the wearer when a diaper is worn on the wearer, and “inseam” means that the wearer wears a diaper. When the wearer wears a diaper, the part covering the inseam of the wearer means the part covering the back side (back of the body) of the wearer.

  In addition, the “absorbent body” is a member having a function of absorbing and holding the urine excreted by the wearer in the tape-type disposable diaper, and includes the front body, the crotch part, and the back body as described above. And a plurality of sheets are laminated in a state of sandwiching the absorber. For example, as such an absorbent main body, as shown in FIG. 1, the absorbent body 22, the inner surface sheet 18 arranged so as to cover the inner surface of the absorbent body 22, and the outer surface of the absorbent body 22 are covered. The outer surface sheet 20 disposed on the outer surface sheet 20 as a constituent element, and the absorbent body 22 is fixed in a state of being sandwiched between the inner surface sheet 18 and the outer surface sheet 20, and an integrated member can be exemplified.

  In addition, the “side flap” refers to a portion that is formed by a portion that protrudes in a region lateral to the absorbent main body at the left and right side edge portions of the rear body of the absorbent main body. Such a side flap becomes a site | part which covers a wearer's flank at the time of diaper wear. 1 shows an example in which the front body 2 of the absorbent main body 14 is also provided with side tabs 38 smaller than the side flaps 8 of the back body 6, but both side edges 2a of the front body 2 are shown. , 2b does not necessarily have to be extended from the absorbent main body 14.

  The "fastening tape" is a member for fixing the front body and the back body of the diaper when the tape-type disposable diaper is worn. In the tape-type disposable diaper of the present invention, the front body It is comprised by the fastener part which fixes to a to-be-attached part, and the base material for arrange | positioning a fastener part. In addition, as a fastener part, the hook material of a mechanical fastener and the adhesive fastener which fixes by the adhesive force of an adhesive agent can be mentioned.

  The “hook material” described above is a convex member of a mechanical fastener (also referred to as a planar fastener) and can be fixed by mechanical coupling with a loop material that is a concave material. As the “hook material”, for example, a material having a large number of protrusions (such as a bowl shape, a mushroom shape, a bowl shape) formed on the surface thereof is used.

  Further, the “base material” of the fastening tape means that a hook material or the like is attached in the vicinity of one end portion, and the other end portion is fixed to, for example, the front end of a side flap of a tape-type disposable diaper. It functions as the main body of the fastening tape.

[1] Tape-type disposable diapers:
Figure 1 is a plan view showing an embodiment of a tape type disposable diaper, expand the tape type disposable diaper is a view showing a state viewed from the top sheet side. Also, FIG. 2 is an enlarged view of the side flap of tape-type disposable diaper shown in Figure 1, Figure 3 is a plan view showing an example of a side flap of tape-type disposable diaper.

As shown in FIGS. 1 to 3, the tape type disposable diaper 1, the side edge portion 8b of the crotch portion of the side flaps 8, the tensile stress Pb in a tensile direction X of the fastening tape 10, the side flaps 8 This is a tape-type disposable diaper 1 configured to be larger than the extension stress Pa in the tension direction X of the fastening tape at the side edge portion 8a on the rear body end side.

The tape-type disposable diaper 1 having the side flaps 8 that are configured as described above, when fixing the back body 6 and front body 2 of the diaper by fastening tape 10, fit into the line of the wearer's body Thus, the side flaps 8 can expand and contract in an appropriate state, and a good wearing feeling can be obtained. For this reason, according to the wearer's body line, the stretchability of the side flap 8 can be made to follow well, excessive tightening by the side flap 8, loosening of the side edge portions 8a and 8b of the side flap 8, etc. Can be made difficult to occur.

  For example, the side flap of a conventional tape-type disposable diaper is formed of a uniform sheet of material, so it has a certain degree of elasticity in the direction of the waist, but the circumference of the wearer's torso For the body line from to the leg circumference, sufficient fit cannot be obtained, and the stretchability of the side flap cannot follow the wearer's body line, and the wearer and the side flap There was a problem that a gap was formed between them. That is, the wearer's body line generally has a large dimensional change on the waist side (that is, around the waist), while the dimensional change is small on the leg side (for example, below the waist). It is extremely difficult to follow the stretchability of a side flap formed by a sheet of a uniform material as a whole against a body line having such a dimensional change.

Side flaps 8 of the tape type disposable diaper 1, in the "side edges 8a of the back portion end portion side of the side flaps 8" dimensional change is located in the larger waist side, the fastening tape in a tensile direction X In the “side edge portion 8b on the crotch part side of the side flap 8” that is positioned on the leg circumference side where the extension stress Pa is small and the dimensional change is small, the extension stress Pb in the tension direction X of the fastening tape 10 is increased. doing. For this reason, the side flap side has a large stretchability (that is, sufficient stretchability to cope with dimensional changes) and the leg stretch side is relatively small, so that the side flaps are effective. Can be prevented.

  Specifically, the waist side expands and contracts with a small force (that is, the extensional stress Pa is small), so the abdominal circumference changes before and after a meal, and the abdominal circumference changes when sleeping and sitting. On the other hand, it is excellent in followability around the waist, and further, the contraction force on the leg circumference side becomes strong (that is, the tensile stress Pb is large), so that it is difficult to form a gap such as slack around the leg. There is.

  In the present specification, “the direction of tension of the fastening tape” means the tip of the fastening tape (that is, the end opposite to the end connected to the side flap of the fastening tape), It means the direction in which the side flap is pulled by the fastening tape when pulled toward the outside of the diaper (that is, the direction perpendicular to the side edge of the absorbent main body).

  The side flap “stretching stress in the tension direction of the fastening tape” refers to a test piece of a predetermined size cut out from the side flap, and chucked at both ends of the test piece (a member that clamps and fixes the end of the test piece). It is the stress measured at 50% elongation when placed on a tensile tester that can be fixed by, for example. Examples of the tensile tester include “Strograph (trade name)” manufactured by Toyo Seiki Co., Ltd. and “Tensilon (trade name)” manufactured by A & D. Hereinafter, the measuring method of the extensional stress in the tension direction of the fastening tape of the side flap will be specifically described.

  First, a test piece having a length of 40 mm and a width of 25 mm is cut out from the side flap for measuring the tensile stress. That is, as shown in FIG. 4A, the side edge portion 8 a on the rear body end side of the side flap 8 and the side edge portion 8 b on the crotch part side of the side flap 8 are 25 mm wide from the side edge of the side flap 8. It cuts out and produces the test piece 9 of each part. FIG. 4A shows an example in which the side flap 8 is configured so that its width gradually decreases from its root side (side connected to the absorbent main body) to the tip side. In the side flap 8, it cuts diagonally so that it may become parallel with the side edge part of the side flap 8, and the test piece 9 is produced. On the other hand, although illustration is omitted, when the side flap has a constant width from the root side to the tip side, the test piece can be cut out straight along the side edge of the side flap. Here, FIG. 4A is a plan view showing a method for producing a test piece when measuring the tensile stress in the tensile direction of the fastening tape of the side flap.

  Next, as shown in FIG. 4B, the obtained test piece 9 is fixed to the tensile tester 60 at a distance between chucks 62 of 20 mm. In addition, when fixing to the chuck 62, the base side and tip end portions of the side flap 8 (see FIG. 4A) are fixed to the chucks 62 and 62, respectively. FIG. 4B shows an example in which the test piece 9 is fixed to each chuck 62 by 10 mm. When the test piece 9 is fixed, the test piece 9 is fixed so that the line parallel to the side edge of the side flap in the test piece 9 is in the tensile direction Y of the tensile tester 60. That is, the line parallel to the side edge of the side flap is fixed so as to be perpendicular to the fixing surface 62 a of the chuck 62.

  Next, as shown in FIG. 4C, the test piece 9 fixed to the chuck 62 of the tensile tester 60 is pulled at a speed of 200 mm / min, and the stress at 50% extension (when the distance between chucks is 30 mm) is measured. The stress (N / 25 mm) obtained by this measurement is defined as an extensional stress in each portion of the side flap 8 (see FIG. 4A) (portion where each test piece 9 is manufactured). Here, FIG. 4B and FIG. 4C are plan views for explaining a method of measuring an extensional stress.

  In the measurement of tensile stress, the width of the test piece should be 25 mm, the distance between chucks can be secured to 20 mm, and the test piece should be firmly fixed so that it does not come off the chuck during measurement. If possible, the length of the test piece and the end shape of the test piece (the shape of the portion fixed to the chuck) are not limited to those described above. That is, in FIG. 4B and FIG. 4C, for convenience of measurement, the test piece has a rectangular shape of 40 mm × 25 mm. For example, as shown in FIG. 5, a diamond shape having a width of 25 mm is formed in accordance with the shape of the side edge of the side flap. If it is possible to cut out the test piece 9a and perform extension measurement so that the distance between the chucks 62 becomes 20 mm, the same measurement results as those shown in FIGS. 4A to 4C can be obtained. Here, FIG. 5 is a plan view for explaining another example of the method for measuring the tensile stress.

  Further, as will be described later, when measuring the extension stress in the tensile direction of the fastening tape at the central portion in the width direction of the side flap, as shown in FIG. 6, the central portion 8c in the width direction of the side flap 8 is used. Is cut out with a length of 40 mm and a width of 25 mm so that the center line in the width direction of the side flap 8 becomes the center line in the width direction of the test piece 9 b to produce a test piece 9 b, and this test piece 9 b is used. The measurement is performed according to the measurement method described above (see FIGS. 4B and 4C). Here, FIG. 6 is a plan view showing a method for producing the test piece 9b when measuring the extension stress in the tensile direction X of the fastening tape at the central portion 8c in the width direction of the side flap 8. FIG.

  Hereinafter, each component of the tape type disposable diaper of this invention is demonstrated more concretely.

[1-1] Side flap:
As shown in FIGS. 1 to 3, the tape type disposable diaper 1, both side edges 6a of the back portion 6 of the absorbent body 14 comprises a side flap 8 extending from 6b. And the fastening tape 10 for fixing the front body 2 and the back body 6 of a diaper is arrange | positioned at the front-end | tip of this side flap 8. As shown in FIG.

  The side flap 8 of the tape-type disposable diaper 1 of the present invention is such that the extension stress Pb in the tensile direction X of the fastening tape 10 at the side edge portion 8b of the side flap 8 on the crotch 4 side is the rear body 6 of the side flap 8. Since it is comprised so that it may become larger than the extensional stress Pa in the tension direction X of the fastening tape 10 in the side edge part 8a by the side of an edge part, the side flap 8 covers a wearer's flank at the time of diaper wear When it arrange | positions in this way, it can be expanded-contracted in a suitable state according to a wearer's body line, and a favorable wear feeling can be obtained.

  In addition, the magnitude | size of the concrete extension stress Pa and Pb of each side edge part 8a, 8b of the side flap 8 is a diaper application object (for example, for infants and adults), and the magnitude | size (for example, S size). , M size, L size, etc.) can be appropriately selected according to the wearer's body shape, etc., for example, in the side edge portion 8a on the end side of the back side of the side flap 8 at the time of 50% extension The tensile stress Pa is preferably 1.5 to 4 N / 25 mm, and more preferably 2 to 3 N / 25 mm. By comprising in this way, a favorable fit can be acquired in the trunk periphery side with a large dimensional change.

  In addition, when the extension stress Pa at the time of 50% elongation in the side edge portion on the end side of the back body is less than 1.5 N / 25 mm, it may be too loose to obtain a good fit. If it exceeds 25 mm, the tensile stress becomes too large, and it may be difficult to follow the dimensional change on the waistline side.

  Further, the extension stress Pb at the time of 50% extension in the side edge portion 8b on the crotch part side of the side flap 8 is preferably 2.5 to 7.5 N / 25 mm, and preferably 4 to 6 N / 25 mm. preferable. With such a configuration, the contraction force on the leg periphery side becomes strong, so that it is difficult to form a gap such as a slack around the leg.

  In addition, if the elongation stress Pb at the time of 50% elongation at the side edge portion on the crotch side is less than 2.5 N / 25 mm, a gap is easily formed on the leg circumference side, and urine leakage from the leg circumference opening may occur. If it exceeds 7.5 N / 25 mm, the contraction force on the leg periphery side becomes too strong, the stretchability around the leg is lowered, and it may be difficult to move. Note that the tensile stress Pb is larger than the tensile stress Pa also in the preferable range of the tensile stress.

  In the present invention, when the side flap is divided into two parts, a side edge part on the crotch part side and a side edge part on the end part side of the back body, the crotch part in the width direction from the crotch part of the side flap The range of at least 30 to 70% on the side is the side edge portion on the crotch part side, and the range of at least 30 to 70% on the side of the back body end in the width direction from the back body end of the side flap is the back body end. The side edge portion on the part side.

  Such a side flap is formed by, for example, a sheet made of a breathable water-repellent material or the like, in which a thread-like, ribbon-like, or belt-like stretchable elastic body is arranged, or a sheet made of a film-like stretchable elastic body. Can be formed.

  For example, the side flap 8 shown in FIG. 3 includes stretchable elastic bodies 50a and 50b having two or more different elastic moduli. More specifically, in the side flap 8 shown in FIG. 3, stretchable elastic bodies 50a and 50b having two or more different elastic moduli are attached to the sheet 58 constituting the side flap 8 in an expanded state. By sticking the elastic elastic bodies 50a and 50b having two or more different elastic moduli, the side edge portion 8b on the crotch 4 side where the tensile stress Pb is large, and the side on the back body end 6 side where the tensile stress Pa is small An edge portion 8a is formed.

  As the sheet 58 constituting the side flap 8 described above, a sheet (for example, a breathable water repellent sheet) made of a breathable water repellent material exhibiting resistance to liquid permeation is often employed. In this case, the breathable water-repellent sheet may be a nonwoven fabric produced by a method such as card embossing or spunbond, but it is more preferable to use a nonwoven fabric sheet such as SMS or SMMS with high waterproofness.

  Moreover, as the elastic elastic bodies 50a and 50b, for example, urethane thread rubber or the like can be used. For example, “Lycra (trade name)” manufactured by Tolo Perontex Co., Ltd., “Royca (trade name)” manufactured by Asahi Kasei Fibers Corporation, and the like can be mentioned. It is also possible to use a stretchable elastic body in which natural rubber, synthetic rubber, or a rubber mixture thereof is used as a main raw material, and the main raw material is formed into a ribbon shape. Examples of such a stretchable elastic body include “Silver Queen (trade name)” manufactured by Asahi Tech Co., Ltd.

  The stretchable elastic body can be fixed by an adhesive or other means. Examples of the fixing method include an adhesive method using a hot melt adhesive and other highly fluid adhesives, a heat sealing method including heat sealing, and a method using welding using ultrasonic waves.

  Such a side flap 8 including the elastic elastic bodies 50a and 50b having two or more different elastic moduli is fixed to a sheet made of a breathable water-repellent material in the same stretched state, that is, the same stretch ratio when manufactured. Therefore, manufacturing is easy. Further, when the stretchable elastic bodies 50a and 50b are fixed at the same elongation, the stretchable elastic body easily contracts uniformly, so that the side flap shape is hardly distorted. As a result, the ease of handling of the tape is not adversely affected.

Moreover, in the tape-type disposable diaper of the present invention, for example, as shown in FIG. 7, it includes stretchable elastic bodies 51a and 51b having the same elastic modulus, and the side edge portion 8a on the rear body end side and the crotch part The elastic elastic bodies 51a and 51b may be bonded to the sheet 58 constituting the side flap 8 in different stretched states with the side edge portion 8b on the side. That is, in the side flap 8 shown in FIG. 7, by making the extension states of the elastic elastic bodies 51a and 51b different from each other, the side edge portion 8b on the crotch side where the extension stress Pb is large and the extension edge Pa is small. A side edge portion 8a on the body end side is formed. Here, FIG. 7 is a plan view showing another example of the side flaps of the tape type disposable diaper.

  In addition, as the sheet | seat 58 which comprises the elastic elastic bodies 51a and 51b and the side flap 8, what was comprised similarly to the elastic elastic body and sheet | seat shown in FIG. 3 can be used.

  The side flaps 8 in which the elastic elastic bodies 51a and 51b are stuck to the sheet 58 in different stretched states have a shape in which the formed side flaps 8b are short and contracted. Users will be aware that they will stretch differently, and will be able to wear them with attention to fit.

  Although illustration is omitted, for example, if the side flaps have a large extension stress Pb in the side edge part on the crotch part side and a small extension stress Pa in the side edge part side on the rear body end part side, different elasticity It may be a side flap constituted by sticking a stretchable elastic body having a rate to a sheet in different stretched states.

Moreover, in the tape-type disposable diaper of the present invention, for example, as shown in FIG. 8, the tape-type disposable diaper includes a stretchable elastic body 52 a having the same elastic modulus, and the stretched elastic body 52 a is a side edge portion on the rear body end side. The side flap 8 may be arranged in a larger amount in the side edge portion 8b on the crotch part side than 8a. In other words, in the side flap 8 shown in FIG. 8, by arranging a large amount of the elastic elastic body 52a on the side edge portion 8b on the crotch part side, the tensile stress Pb on the side edge part 8b on the crotch part side is reduced. It is configured to be larger than the side edge portion 8a on the end side. Here, FIG. 8 is a plan view showing still another example of the side flaps of the tape type disposable diaper.

  Such a side flap 8 in which a large amount of the elastic elastic body 52a is arranged on the side edge portion 8b on the crotch side is formed into a sheet made of a breathable water repellent material in the same stretched state, that is, at the same stretch rate when manufactured. Manufacture is easy because it only needs to be fixed. Further, when the stretchable elastic body 52a has the same elongation and is fixed, the stretchable elastic body easily contracts uniformly, so that the side flap shape is hardly distorted. As a result, it does not adversely affect the handling of the tape.

  In addition, for example, although not shown, after the same amount of stretched elastic body is disposed on the side edge part on the crotch side and the side edge part on the back body end side, the side edge part on the back body end part side is disposed. It may be a side flap in which a part of the arranged elastic elastic body is cut so that the contraction force of the cut elastic elastic body does not act. FIG. 8 shows an example in which the elastic elastic body 52a having the same elastic modulus is used, but the extension stress Pb of the side edge portion on the crotch part side becomes large, and the side on the rear body end side is increased. As long as the side flaps have a small extensional stress Pa at the edge portion, stretchable elastic bodies having different elastic moduli may be used, and further, the amount of the stretchable elastic bodies placed on the sheet may be different.

  Furthermore, in the tape-type disposable diaper of the present invention, for example, as shown in FIG. 9, the side flap 8 may include film-like stretchable elastic bodies 53a and 53b. Here, in FIG. 9, one (one) extension elastic body 53a having an extension stress Pa is arranged on the side edge portion 8a on the rear body end side, and the extension stress Pa is applied on the side edge portion 8b on the crotch part side. An example in which one (one) extension elastic body 53b having a larger extension stress Pb is arranged is shown.

  For such side flaps 8 on which the film-like stretchable elastic bodies 53a and 53b are arranged, it is only necessary to select film-like stretchable elastic bodies having different extension stresses. In addition, when the stretchable elastic body is fixed on the base material in the stretched state, the side elastic flap may shrink and the side flaps may shrink and wrinkles. The flaps are less likely to wrinkle, the side flaps look good, and the usability is excellent.

  In addition, as a stretched elastic body formed in a film shape, for example, a material made of a thermoplastic elastomer can be cited as a suitable example. Examples of the thermoplastic elastomer include polyurethane elastomers, olefin elastomers, styrene elastomers, polyester elastomers, and the like.

  The above-mentioned thermoplastic elastomer can suppress elongation by adding hot embossing. That is, there are cases where the tensile stress can be increased. When such a material is selected, by adding hot embossing to a part of a continuous thermoplastic elastomer film, a region having a high tensile stress with the addition of heat embossing and a region having a low tensile stress without the addition of the heat embossing are provided. be able to. Side flaps may be formed by sandwiching the film thus obtained with a nonwoven fabric having high extensibility. This non-woven fabric is placed in a stretchable state so as not to impair the stretchability of a stretchable elastic body (film) made of a thermoplastic elastomer to be sandwiched. “Extensible state” means that the nonwoven fabric is pre-processed to form wrinkles and folds, the strength of the sheet (nonwoven fabric) is weakened with a water jet, It is also included to select a non-woven fabric with high original extensibility, such as

  Moreover, it is preferable that a side flap does not have a stretching property in the tape side edge part which fixes a tape, and the diaper side edge part fixed with a diaper main body, or is made so that a elasticity may not be expressed. If the above-mentioned part is stretchable, the adhesive strength of the fixed part of the side flap may be weak, wrinkles may appear and the appearance may be poor, or the fixed part may be easily broken. Specific methods for preventing or not exhibiting stretchability include a method that does not place a stretchable elastic body, and a place where a stretchable elastic body is placed. And a method for cutting, a method for suppressing stretchability, and the like by laminating and laminating nonwoven fabrics and films having poor stretchability. For example, FIG. 9 shows an example in which the elastic elastic bodies 53a and 53b are not arranged in the tape side end 81 for fixing the tape and the diaper side end 82 fixed to the diaper main body.

In the tape type disposable diaper, at least a portion of the crotch portion side side edge portion and the back body end side side edge portion of the side flaps may be one that is configured to separate . For example, as shown in FIG. 10, the side flap 8 is formed with a slit 15 that separates at least a part of the side edge portion 8b on the crotch side and the side edge portion 8a on the back body end side. It may be a thing. Thus, the side flaps 8 are separated by at least a part of the side edge part 8b on the crotch part side and the side edge part 8a on the rear body end part side, so that the stretching force in each part becomes independent. The side edge part 8b on the crotch part side and the side edge part 8a on the rear body end part side can be expanded and contracted in an appropriate state. Further, when the wearer moves so that the leg circumference extends, for example, when sitting, the side edge portion 8b on the crotch side is greatly extended, but the slit 15 is on the side edge on the rear body end side. Since the force pulling the portion 8a is divided, the diaper is difficult to slide down. On the contrary, even if force is applied to the side edge portion 8a on the back body end side due to a large stretch around the abdomen, the force is not transmitted because the side edge portion 8b on the crotch side has the slit 15. , There is an effect that the leg circumference is difficult to slide up. Here, the “slit” formed in the side flap is a cut formed in the sheet constituting the side flap.

Further, in the tape type disposable diaper, as shown in FIG. 11, the side flaps 8, a side edge portion 8b of the crotch portion, at a side edge portion 8a of the back body end portion side, by the slits 15 It may be divided into two, and the fastening tape 10 may be disposed across the side flaps 8 divided into two.

  FIG. 10 shows an example in which a part of the side flap 8 is separated by the slit 15 at the center in the width direction, and the base side and the tip side of the side flap 8 are connected. As shown in FIG. 3, the side flap 8 may be divided into two by the slit 15 from the root side to the tip side. As a result, the crotch side edge portion 8b and the back body edge portion side edge portion 8a that have different stretching stresses can be expanded and contracted completely independently, and a more comfortable fit can be obtained. .

Here, FIG. 10 and FIG. 11 is a plan view showing still another example of the side flaps of the tape type disposable diaper. Moreover, in FIG.10 and FIG.11, although the expansion | extension elastic body 51a, 51b which has the same elastic modulus is shown in the sheet | seat 58 which comprises the side flap 8, the example at the time of sticking in a different expansion | extension state is shown. The stretchable elastic body included in the side flap is not limited to this, and the stretchable elastic body described so far can also be used.

  In addition, the side flaps described so far are configured such that the extension stresses are different in the two parts (regions) of the side flap part on the crotch part side and the side edge part on the rear body end part side. In the tape-type disposable diaper of the present invention, for example, in the central portion in the width direction of the side flap, the extension stress Pc in the tension direction of the fastening tape is at the end side of the back body. It may be configured to be larger than the extension stress Pa in the edge portion and the extension stress Pb in the side edge portion on the crotch part side.

  That is, in the tape-type disposable diaper of the present invention, as shown in FIG. 12, the extension stress Pc in the tensile direction X of the fastening tape 10 at the center portion 8c in the width direction of the side flap 8 is the end side of the back body. The side flap 8 may be configured to be larger than the extension stress Pa in the side edge portion 8a and the extension stress Pb in the side edge portion 8b on the crotch part side. Here, FIG. 12 is a plan view showing still another example of the side flap of the tape-type disposable diaper of the present invention.

  By comprising in this way, the expansion | extension of the center part 8c of the width direction of the side flap 8 is most suppressed, and the side edge by the side of the edge part of a back body is so large that force (tensile force) is added with respect to the center part 8c. The absolute amount of force transmitted to the portion 8a and the side edge portion 8b on the crotch part side increases, and the side edge portions 8a and 8b are more difficult to loosen. As a result, the entire side flap 8 is greatly expanded. In particular, the side edge portion 8a on the end side of the back body 6 extends more greatly, and a gap is difficult to form in the side edge portion 8b on the crotch 4 side.

  In the case where the region having the largest tensile stress is formed in the central portion 8 c in the width direction of the side flap 8, the width of the central portion 8 c is not particularly limited, and the tensile stress in the central portion 8 c in the width direction of the side flap 8. Pc should just be comprised so that it may become large compared with other parts (the side edge part 8a of the edge part side of a back body, and the side edge part 8b of the crotch part side). Although not particularly limited, by setting the range of at least 10 to 40% in the width direction centering on the center axis in the width direction of the side flap 8 as the above-described central portion 8c having the largest tensile stress. The central portion 8c becomes the core of the side flap 8, and the side edge portions 8a and 8b can be made difficult to loosen satisfactorily.

  Moreover, there is no restriction | limiting in particular about the structure of the center part 8c of the width direction of such a side flap 8, if the extensional stress Pc becomes the largest. In FIG. 12, the side flap 8 includes film-like stretchable elastic bodies 54a and 54b having two or more different elastic moduli (two different elastic moduli in FIG. 12), and a central portion 8c in the width direction. The example in which at least a part of the two or more stretchable elastic bodies 54a and 54b are arranged in an overlapping state is shown. In this way, the center portion 8c in the width direction has its stretching stress caused by the overlapping of the elastic elastic bodies 54a and 54b of the side edge portion 8a on the back body end side and the side edge portion 8b on the crotch part side. It is the largest. In addition, as the elastic elastic bodies 54a and 54b and the sheet 58 constituting the side flap 8, the same elastic elastic bodies and sheets constituting the side flaps described so far can be suitably used.

  In the tape-type disposable diaper of the present invention, as shown in FIG. 13, the side flap 8 includes stretchable elastic bodies 55a, 55b, 55c having the same elastic modulus, and the stretchable elastic bodies 55a, 55b, 55c. Is attached to the sheet 58 constituting the side flap 8 in a different stretched state at the side edge portion 8a on the rear body end side, the side edge portion 8b on the crotch side, and the central portion 8c in the width direction. It may be.

  That is, in FIG. 13, the stretchable elastic body 55a of the side edge portion 8a on the rear body end side is disposed in the most loosely stretched state, and then the stretched state of the stretchable elastic body 55b of the side edge portion 8b on the crotch side is located. The stretchable elastic body 55c of the central portion 8c in the width direction is arranged in the strongest stretched state. By configuring in this way, the side flap is shortened in the order of the central portion 8c, the side edge portion 8b on the crotch side, and the side edge portion 8a on the rear body end side, and visually the central portion, The user will be aware that the legs and abdomen will be stretched differently, and will be able to wear with attention to fit.

  Further, for example, as shown in FIG. 14, the side flap 8 includes stretchable elastic bodies 56 a, 56 b, and 56 c having the same elastic modulus, and the stretchable elastic bodies 56 a, 56 b, and 56 c are arranged on the rear body end side. A larger amount is disposed in the crotch side edge portion 8b than the side edge portion 8a, and a larger amount is disposed in the widthwise center portion 8c than in the crotch side edge portion 8b. It may be a thing. By configuring in this way, it is easy to manufacture because it has only to be fixed to a sheet made of a breathable water repellent material in the same stretched state, that is, in the same stretch ratio. Further, when the stretchable elastic bodies 56a, 56b, and 56c are fixed at the same elongation, the stretchable elastic body easily contracts uniformly, so that the side flap shape is not easily distorted. As a result, it does not adversely affect the handling of the tape.

  Further, as shown in FIG. 15, the side flap 8 includes film-like stretchable elastic bodies 57a, 57b, and 57c having the same elastic modulus, and the stretchable elastic bodies 57a, 57b, and 57c formed in a film shape include , Arranged on the side edge portion 8a on the back body end side in a state of being laminated in one or more layers, and arranged on the side edge portion 8b on the crotch side in a state of being laminated in two or more layers, In addition, it may be arranged in a state of being laminated in three or more layers in the central portion 8c in the width direction. That is, by changing the number of layers of the stretch elastic bodies 57a, 57b, 57c in the side edge portion 8a on the back body end side, the side edge portion 8b on the crotch side, and the central portion 8c in the width direction, The expansion stress Pc in the central portion 8c in the width direction is maximized, the expansion stress Pb in the side edge portion 8b on the crotch part side is then increased, and the expansion stress Pa on the side edge portion 8a on the rear body end side is maximized. Make it smaller.

  In FIG. 15, the elastic elastic body 57a of the side edge portion 8a on the back body end side is disposed in a single layer, and the elastic elastic body 57b of the side edge portion 8b on the crotch side is disposed in a stacked state, The example in the case of arrange | positioning in the state by which the elastic-elastic body 57c of the center part 8c of the width direction was laminated | stacked by three layers is shown. By comprising in this way, since a film-like elastic elastic body should just be arrange | positioned and piled up, a manufacturing facility becomes easy. In addition, when the stretchable elastic body is fixed on the base material in the stretched state, the side elastic flap may shrink and the side flaps may shrink and wrinkles. The flaps are less likely to wrinkle, the side flaps look good, and the usability is excellent.

  Moreover, in the side flap 8 shown in FIG. 16, although one film-like elastic elastic body 71 is arrange | positioned, the part 71a arrange | positioned at the side edge part 8a by the side of the back body part of a film-like elastic elastic body And the portion 71b disposed on the side edge portion 8b on the crotch side and the portion 71c disposed on the central portion 8c in the width direction have a relationship of Pc> Pb> Pa. . By comprising in this way, since one sheet-like elastic elastic body should just be arrange | positioned, a manufacturing facility becomes simple. Further, the side flaps are less likely to wrinkle, the appearance of the side flaps is uniform and good, and the usability is excellent.

  As described above, by changing the extent to which hot embossing is applied to a part of a continuous thermoplastic elastomer film, one film-like stretchable elastic body has a region having a high tensile stress, a region having a low tensile stress, An intermediate region can be provided. A side flap may be formed by sandwiching the film (stretchable elastic body) thus obtained with a nonwoven fabric having high extensibility.

  Further, the side flap has slits that separate at least a part of the side edge part on the crotch part side and the center part in the width direction, and the side edge part on the back body end side and the center part in the width direction. It may be formed. That is, at least a part of each of the side edge part on the crotch part side, the center part in the width direction, and the side edge part on the rear body end part side may be separated. Good.

  Further, in the tape-type disposable diaper of the present invention, the side flap includes a side edge portion on the crotch side where the tensile stress Pb is large and a side edge portion on the rear body end side where the tensile stress Pa is small. The side edge part on the crotch part side and the side edge part on the rear body end part side are overlapped at the center part in the width direction of the side flap, so that the center part in the width direction is separated. It may be configured such that the extension stress Pc at is greater than the extension stress Pa and the extension stress Pb.

  For example, in FIG. 17A and FIG. 17B, the side flap in which the stretchable elastic body 72a of the side edge portion 8a on the rear body end side is disposed (one piece), and the stretchable elastic body 72b of the side edge portion 8b on the crotch side. The side flap in which one layer (one sheet) is arranged is overlapped at the central portion 8c in the width direction of the side flap, and the fastening tape 10 is fixed.

  In this case, a central portion 8c in which the side edge portion 8a on the rear body end side and the side edge portion 8b on the crotch portion side overlap is formed in the central portion in the width direction of the side flap, and the apparent portion of the central portion 8c is formed. The tensile stress Pc is the largest. As shown in FIG. 17B, the side edge portion 8a on the rear body end side and the side edge portion 8b on the crotch part side that constitute the central portion 8c merely overlap each other and are particularly joined. is not.

  When the side edge portion 8a on the rear body end side and the side edge portion 8b on the crotch part side overlap in the center part in this way, the side edge part 8a on the back body end part side and the crotch side side The edge portion 8b functions independently to improve fit and are not easily affected by each other. For this reason, the shift | offset | difference of the side flap 8 can be reduced. Furthermore, since there is a central portion 8c that overlaps at the central portion, the central portion 8c becomes the core of the side flap 8, and the side flap 8 can be satisfactorily stretched and worn.

  Moreover, since the center part 8c of the side flap 8 corresponds to a tape attachment position at the time of wearing, it forms a part of the belt | band | zone fastened around the stomach | belt at the time of wear. In this way, if the center portion has a core, the diaper can be tightly fixed around the waist, and the side edge portion 8a on the end of the back body stretches in accordance with the change in the abdomen, Since the side edge portion 8b stretches around the leg, a very good fit is obtained.

  Here, FIGS. 12 to 17A are plan views showing still other examples of the side flaps of the tape-type disposable diaper of the present invention. FIG. 17B is a schematic diagram showing the A-A ′ cross section of FIG. 17A.

  In addition, it is preferable that the elongation stress Pc at the time of 50% expansion | extension in the center part of the width direction is 4-11.5N / 25mm, and it is preferable that it is 6-9N / 25mm. By comprising in this way, the center part of the width direction becomes a core of a side flap, and the whole side flap can be extended favorably.

[1-2] Absorbent body:
The tape-type disposable diaper of the present invention includes an absorbent main body as a member having a function of absorbing and holding urine excreted by the wearer. The absorbent main body is formed by laminating a plurality of sheets in a state of sandwiching the absorbent body. For example, as shown in FIG. 1, the absorbent main body is composed of the front body 2, the crotch 4, and the back body 6. The absorbent body 22 includes an absorbent body 22, an inner surface sheet 18 disposed so as to cover the inner surface of the absorbent body 22, and an outer surface sheet 20 disposed so as to cover the outer surface of the absorbent body 22. May be a member that is fixed in a state of being sandwiched between the inner sheet 18 and the outer sheet 20 and integrated in a pad shape.

  The above-mentioned "inner surface of the absorber" refers to a surface located on the skin side of the wearer when wearing a tape-type disposable diaper, while the above-mentioned "outer surface of the absorber" is a tape type When a disposable diaper is worn, it refers to the surface located on the wearer's clothing side.

  In the tape-type disposable diaper of the present invention, the tensile stress Pb in the pulling direction of the fastening tape at the side edge portion on the crotch lower side of the side flap is The structure of the absorbent main body is not particularly limited as long as it is configured to be larger than the tensile stress Pa in the tensile direction of the wearing tape. For example, the absorbent main body used in a conventionally known tape-type disposable diaper and A similarly constructed absorbent body can also be used. Hereinafter, each component of an absorptive main body is demonstrated concretely.

[1-2a] Inner surface sheet:
An inner surface sheet is a sheet | seat arrange | positioned on the surface located in a wearer's skin side. For this reason, it is preferable that at least a part of the inner surface sheet is constituted by a liquid-permeable sheet. By comprising in this way, urine can permeate | transmit a liquid-permeable sheet | seat, reaches | attains an absorber rapidly, and can be absorbed and hold | maintained. In addition, as long as at least one part is comprised with the liquid-permeable sheet, the whole inner surface sheet does not necessarily need to be comprised with the liquid-permeable sheet. As long as the liquid-permeable sheet is a sheet having liquid permeability, the material of the sheet is not particularly limited, and examples thereof include a woven fabric, a nonwoven fabric, and a porous film.

  In addition, as a more suitable example of an inner surface sheet, a liquid-permeable nonwoven fabric can be mentioned. By using such a liquid-permeable nonwoven fabric, the touch is good and the smoothness of the surface after liquid absorption can be improved.

[1-2b] Outer sheet:
An outer surface sheet is a sheet | seat arrange | positioned on the surface located in a wearer's clothing side. The outer sheet is preferably a liquid-impermeable sheet that does not transmit urine so that urine absorbed by the absorbent body does not leak outside the absorbent main body. Possible liquid low-permeability sheets can also be used.

  As the liquid impervious sheet described above, a polyethylene film used for general absorbent products can be cited as a preferred example. Such polyethylene films include a moisture permeable polyethylene film and a non-moisture permeable polyethylene film, and any film can be used as an outer sheet, but a moisture permeable polyethylene film can be more suitably used. By using such a moisture-permeable polyethylene film as an outer sheet, stuffiness is reduced during wearing, and comfort when a diaper is worn can be improved.

  Moreover, as a liquid low-permeability sheet | seat mentioned above, a nonwoven fabric with a high water pressure resistance can be mentioned as a suitable example. As the nonwoven fabric with high water pressure resistance, for example, nonwoven fabrics such as SMS (spunbond / meltblown / spunbond) and SMMS (spunbond / meltblown / meltblown / spunbond) are preferable.

[1-2c] Absorber:
The absorber used for the general absorbent product can be used as the absorber. For example, as an absorbent material constituting the absorber, fluff pulp obtained by pulverizing wood pulp into a cotton shape and a highly water-absorbing resin (hereinafter sometimes referred to as “SAP”) can be cited as preferred examples.

  In addition, in order to wrap the said absorber as needed, you may have further the water absorbent paper and the nonwoven fabric which performed the hydrophilic treatment. That is, it may be an absorbent body in which an absorbent material containing fluff pulp and SAP is wrapped with the above water-absorbing paper or a non-woven fabric subjected to hydrophilic treatment. Such a configuration has an advantage that SAP can be prevented from leaking from the absorber and shape stability can be imparted to the absorber.

  Although there is no restriction | limiting in particular about the shape of an absorber, The shape used in the conventional disposable diaper and other absorbent articles, for example, a rectangular shape, an hourglass type, a gourd type, a T shape etc. can be mentioned. A tape-type disposable diaper 1 shown in FIG. 1 is an example in which a rectangular absorbent body is used as the absorbent body 22.

[1-3] Fastening tape:
The tape-type disposable diaper of the present invention includes a fastening tape that is a tape-like fastener for fixing the back body and the front body. When wearing a tape-type disposable diaper, the entire diaper can be made into a pants-type by fastening this fastening tape to the front body (for example, a fastening region formed in the front body), It becomes possible to attach a diaper to a wearer. This fastening tape is arranged at least one by one on the front end side of the side flaps extended from both side edges of the back body of the absorbent main body.

  The tape-type disposable diaper 1 shown in FIG. 1 is provided with a fastening tape 10 on each of the front end sides of the side flaps 8 extending from the left and right side edges 6a, 6b of the back body 6, one by one. In the adhesive tape 10, a fastener portion 44 made of a hook material 44 a of a mechanical fastener is formed in the vicinity of the tip of a cloth base material 48. In addition, in the front body of an absorptive main body, the to-be-attached area | region which consists of a loop of a mechanical fastener is formed, and it is comprised so that the hook material 44a of the fastening tape 10 can be fixed. preferable. By comprising in this way, the back body 6 of the tape-type disposable diaper 1 can be fixed to the front body 2, and the tape-type disposable diaper 1 can be attached to the wearer.

  In the tape-type disposable diaper 1 of the present invention, the side edge portion 8a on the rear body end side of the side flap 8 and the side edge portion 8b on the crotch side have different extension stresses. Therefore, the fastening tape 10 disposed on the side flap 8 is disposed so as to straddle the respective regions of the side edge portion 8a on the rear body end side of the side flap 8 and the side edge portion 8b on the crotch portion side. It is preferable.

[1-4] Solid gathering:
Moreover, the tape-type disposable diaper of the present invention may be provided with a three-dimensional gather in order to prevent side leakage of urine excreted by the wearer. The three-dimensional gather is a member for preventing side leakage of the urine excreted by the wearer, and is a leak-proof wall configured to stand up three-dimensionally. By forming such a three-dimensional gather, the three-dimensional gather serves as a breakwater, and leakage from a leg-diameter opening or the like (so-called “lateral leakage”) can be effectively prevented.

  The structure currently used for the conventional tape type disposable diaper can be employ | adopted for the structure of a three-dimensional gather. For example, an elastic material is arranged on a part of the water-repellent sheet material (for example, as shown in FIG. 1, a three-dimensional gather elastic material 36 (36a, 36b) is arranged), and the three-dimensional gather elastic material is gathered on the sheet material. What formed (襞) etc. can be used conveniently.

  The three-dimensional gather may be formed of a sheet material that is completely different from the sheet (for example, the inner surface sheet) that constitutes the absorbent main body, but at least one of the plurality of sheets that constitute the absorbent main body. You may form by folding a sheet | seat.

  In order to prevent leakage from the crotch part, this three-dimensional gather may be formed at least in the crotch part, but may be formed in the front body or the back body. For example, the tape-type disposable diaper 1 shown in FIG. 1 has a pair of three-dimensional gathers 26 (26a, 26b) continuously from the crotch part 4 to both the front body 2 and the back body 6 along the longitudinal direction of the diaper. The example which is formed is shown. Note that at least one pair of solid gathers must be formed, but two or more pairs may be formed.

  The three-dimensional gather may be an inward gather that tilts toward the inside of the diaper, or an outward gather that tilts toward the outside of the diaper. Moreover, it can also be set as the three-dimensional gathers (C fold gather, Z fold gather, etc.) which formed the bending part and the folding | turning part in a part of height direction.

[1-5] Various elastic materials:
The tape-type disposable diaper of the present invention may be one in which a leg-around elastic material and a waist-around elastic material are further arranged.

  The leg circumference elastic material is an elastic material arranged along the leg circumference opening. By arranging the leg-stretchable material, a gather (leg gather) rich in stretchability can be formed in the leg-surrounding opening. Therefore, it is difficult to form a gap around the leg, and urine leakage from the opening around the leg can be effectively prevented. Further, when the leg stretchable material is disposed, the leg stretchable material contracts on both sides of the absorbent body when changing the diaper, so that the vicinity of the crotch portion is deformed into a bowl shape and a recess is formed. For this reason, urine etc. accumulate in the crevice and can change a diaper easily, without spilling urine.

  For example, the tape-type disposable diaper 1 shown in FIG. 1 is an example in which leg gathers are formed by linearly arranging three leg elastic members 40 along the longitudinal direction of the absorbent main body 14. The leg-around elastic member 40 is made of rubber thread. In addition, it is not necessary to arrange | position the leg periphery elastic material linearly, for example, you may arrange | position in a curve along the curve of the leg periphery opening part of a diaper.

  It is preferable that the leg-surrounding stretchable material is disposed in a portion outside the standing line of the three-dimensional gather 26, for example, like the tape-type disposable diaper 1 shown in FIG. By comprising in this way, the mounting | wearing feeling of a crotch part can be improved, ensuring the sufficient leak-proof effect of a three-dimensional gather.

  The tape-type disposable diaper 1 shown in FIG. 1 shows an example in which the shape, arrangement position, number of arrangements, and the like of the leg-surrounding elastic members 40 are bilaterally symmetric, but the left and right leg-surrounding elastic members 40 are asymmetric. You may arrange in. And in the tape-type disposable diaper 1 shown in FIG. 1, although the example which has arrange | positioned three leg periphery elastic materials 40 per one side is shown, there is no restriction | limiting in particular about the number of the leg periphery elastic materials 40. FIG. In addition, when a plurality of leg elastic members are used, their thickness, stretch rate, etc. can be appropriately set according to the purpose.

  Next, the waist elastic material is an elastic material disposed along the waist opening. By arranging the elastic material around the waist, a gather (waist gather) rich in elasticity can be formed in the waist opening. This waist gather makes it difficult for gaps to be formed around the waist, and urine leakage from around the waist can be prevented. Moreover, the fitting property of the diaper to a wearer becomes favorable and can prevent the diaper slipping down.

  The tape-type disposable diaper 1 shown in FIG. 1 is an example in which a belt-shaped waist-circular stretchable material 42 is disposed along the edge of the back body 6 and the edge of the front body 2. The belt-shaped waist elastic member 42 can be formed of a stretchable foam such as urethane foam. In addition, in FIG. 1, although the example at the time of arrange | positioning the waist surrounding elastic material 42 in both the back body 6 (back side) and the front body 2 (abdominal side) is shown, only in the edge of a back body You may arrange.

  For these stretchable materials, it is possible to determine the constituent material, the stretch rate of the material, the stretched state at the time of fixation, etc. in consideration of the degree of gather contraction and the like.

  As said elastic material, the elastic material currently used for absorbent articles, such as the conventional disposable diaper, can be used. Specific examples include thread rubber made of an elastic material such as natural rubber and synthetic rubber (urethane rubber, etc.), flat rubber, stretchable net, stretchable film, stretchable foam (urethane foam, etc.), and the like.

  The stretchable material is preferably fixed in a stretched state in order to exert a sufficient stretch force. For example, when the elastic material is natural rubber or synthetic rubber, it is preferably fixed in an extended state of 120 to 400%, and more preferably fixed in an extended state of 200 to 300%. By fixing in the extended state in such a range, it is possible to apply a sufficient stretching force.

  The stretchable material can be fixed by an adhesive and other means. Examples of the fixing method include an adhesive method using a hot melt adhesive and other highly fluid adhesives, a heat sealing method including heat sealing, and a method using welding using ultrasonic waves.

[2] Manufacturing method of tape-type disposable diaper:
Hereinafter, the manufacturing method of the tape type disposable diaper of this invention is demonstrated in the example in the case of manufacturing the tape type disposable diaper 1 shown in FIG. First, a continuous body of an absorbent main body in which the absorbent body 22 is sandwiched at a predetermined interval by a plurality of long sheets (for example, long sheets for forming the outer sheet 20 and the inner sheet 18) is formed. To do.

  Next, in order to form a side flap, a film-like thermoplastic elastomer is prepared for constituting a stretchable elastic body that is respectively disposed on the rear body end side and the crotch part side of the side flap. As the thermoplastic elastomer for constituting the stretchable elastic body arranged at the front end portion of the back body, a thermoplastic elastomer having a lower tensile stress than the thermoplastic elastomer arranged at the crotch portion portion is used.

  A film made of a thermoplastic elastomer can be bonded to a nonwoven fabric bonded to the front and back with a hot melt adhesive, or can be bonded with hot embossing. The fastener portion with the hook material attached to one end of the side flap thus obtained is attached with, for example, hot melt, and then the hook material is folded inside, and the obtained side flap is connected to the continuous absorbent main body. At the predetermined position of the body, it is affixed to the outside opposite to the absorption surface by heat sealing. Then, a side flap is affixed on the predetermined position of an absorptive main body with a hot melt adhesive. The tape-type disposable diaper of this invention can be manufactured by cut | disconnecting the continuous body of the absorptive main body with which such a side flap was affixed to predetermined length.

  The tape-type disposable diaper of the present invention can be suitably used as a diaper for infants or for adults such as elderly people and persons with disabilities who need care.

DESCRIPTION OF SYMBOLS 1,100: Tape type disposable diaper, 2: Front body, 2a, 2b: Side edge (side edge of front body), 4: Crotch part, 6: Rear body, 6a, 6b: Side edge (side edge of back body) ), 8, 108: Side flaps, 8a: Side edge part on the back body end side (side edge part on the back body end side of the side flap), 8b: Side edge part on the crotch side (crotch part of the side flap) Side portion), 8c: center portion (center portion in the width direction of the side flap), 9, 9a, 9b: test piece, 10, 110: fastening tape, 14: absorbent main body, 15: slit, 18 : Sheet (inner surface sheet), 20: Sheet (outer surface sheet), 22: Absorber, 26, 26a, 26b: Three-dimensional gather, 36, 36a, 36b: Three-dimensional gather stretchable material, 38: Side tab, 40: Stretch material around leg , 42 Elastic waist material, 44: Fastener 44a: hook material, 48: base material, 50a, 50b, 51a, 51b, 52a, 55a, 55b, 55c, 56a, 56b, 56c: stretchable elastic body, 53a, 53b, 54a, 54b, 57a, 57b, 57c : Stretchable elastic body (extension elastic body formed in a film shape), 55a, 55b, 55c, 56a, 56b, 56c, 71a, 71b, 71c, 72a, 72b: stretchable elastic body, 58: sheet (constitutes side flap) 60: Tensile tester, 62: Chuck, 62a: Fixing surface of chuck, 71a: Part disposed on the side edge part on the back body end side, 71b: Placed on the side edge part on the crotch part side Portion, 71c: a portion disposed in the central portion in the width direction, 81: a tape side end portion for fixing the tape, 82: a diaper side end portion fixed to the diaper main body, and X: a fastening tee Tensile direction of flops, Y: tensile testing machine tensile direction.

Claims (17)

An absorbent main body composed of a front body, a crotch part, and a back body, and a plurality of sheets laminated in a state of sandwiching an absorbent body,
Side flaps extended from both side edges of the back body of the absorbent body;
A fastening tape disposed at the front end portion of the side flap for fixing the front body and the back body;
Disposed in the front body of the absorbent main body, and a fastening region ,
A tape-type disposable diaper configured such that the fastening tape can be fixed to the adherent region ,
The side flap includes a stretchable elastic body disposed in parallel along a side edge portion on the rear body end side, and a tension direction of the fastening tape in a side edge portion on the crotch part side of the side flap tensile stress Pb in the said at side edges of the back body end side of the side flaps, such are configured to be larger than the tensile stress Pa in the pulling direction of the fastening tape Rutotomoni, the side flaps The tensile stress Pc in the tension direction of the fastening tape in the central portion in the width direction of the fastening member is the tensile stress Pa in the side edge portion on the end side of the back body and the tensile stress in the side edge portion on the crotch part side. Configured to be larger than Pb, and
The fastening tape is located at a side edge part of the crotch part side of the side flap, the center part in the width direction of the side flap, and the rear body end side of the side flap at the tip part of the side flap. tape type disposable diaper that is secured over the respective portion of the side edges. The side flaps, tape type disposable diaper according to claim 1 comprising said stretchable elastic member having two or more different elastic modulus.   The tape-type disposable diaper according to claim 2, wherein the elastic elastic body is formed in a film shape.   The tape-type disposable diaper according to claim 2 or 3, wherein the stretchable elastic body is stuck to a sheet constituting the side flap in an extended state. The side flap comprises the stretchable elastic body having the same elastic modulus,
In a side edge portion and side edge portions of the crotch portion of the back body end portion side, the stretchable elastic body, according to claim 1 which is stuck on the sheet constituting the side flaps in different stretched state Tape-type disposable diaper. The side flap comprises the stretchable elastic body having the same elastic modulus,
2. The tape-type disposable diaper according to claim 1, wherein the stretched elastic body is disposed in a larger amount on the side edge portion on the crotch part side than on the side edge portion on the rear body end side. The side flaps, comprises a film of said stretchable elastic bodies having the same elasticity modulus,
The film-like which is formed on the stretched elastic member is a tape type disposable diaper according to claim 1 which is arranged in a state of being stacked in two or more layers to the side edges of the crotch portion.   The tape-type disposable diaper according to any one of claims 1 to 7, wherein the extension stress Pa at 50% extension in the side edge portion on the end side of the back body is 1.5 to 4 N / 25 mm. .   The tape-type disposable diaper according to any one of claims 1 to 8, wherein the extension stress Pb at 50% extension in the side edge portion on the crotch part side is 2.5 to 7.5 N / 25 mm.   The said side flap is comprised so that at least one part of the side edge part by the side of the said crotch part and the side edge part by the side of the said back body part may isolate | separate. The tape-type disposable diaper described in 1. The side flaps, comprises a film of said stretchable elastic member having two or more different elastic modulus, at the center portion in the width direction, with at least partially overlapping of two or more of the stretchable elastic member The tape-type disposable diaper as described in any one of Claims 1-10 arrange | positioned. The side flap comprises the stretchable elastic body having the same elastic modulus,
The stretchable elastic body is attached to a sheet constituting the side flap in a different stretched state at a side edge part on the rear body end side, a side edge part on the crotch part side, and a central part in the width direction. The tape-type disposable diaper according to any one of claims 1 to 10 . The side flap comprises the stretchable elastic body having the same elastic modulus,
The stretched elastic body is disposed in a larger amount in the side edge part on the crotch part side than in the side edge part on the rear body end part side, and in the width direction than the side edge part on the crotch part side The tape-type disposable diaper according to any one of claims 1 to 10, wherein a larger amount is disposed in the central portion of the tape. The side flaps, comprises a film of said stretchable elastic bodies having the same elasticity modulus,
The stretch elastic body formed on the film shape, the side edges of the crotch portion, are arranged in a state of being stacked in two or more layers, and, in the central portion of the width direction, three layers or more The tape-type disposable diaper as described in any one of Claims 1-10 arrange | positioned in the state laminated | stacked on. The tape-type disposable diaper according to any one of claims 1 to 14 , wherein the extension stress Pc at the time of 50% extension in the central portion in the width direction is 4 to 11.5 N / 25 mm. The side flap separates at least a part of each of the side edge part on the crotch part side and the center part in the width direction, and the side edge part on the side of the rear body end part side and the center part in the width direction. A tape-type disposable diaper according to any one of claims 1 to 15 , wherein a slit is formed. The side flap is formed by separating a side edge part on the crotch part side where the tensile stress Pb is large and a side edge part on the rear body end part side where the tensile stress Pa is small. Yes,
A part of the side edge part on the crotch part side and the side edge part on the rear body end part side overlaps in the center part in the width direction of the side flap, whereby the extension stress in the center part in the width direction. The tape-type disposable diaper as described in any one of Claims 1-10 comprised so that Pc may become larger than the said extension stress Pa and the said extension stress Pb.

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