JP5625357B2 - Tape type disposable diaper - Google Patents

Description

  The present invention relates to a tape-type disposable diaper. More specifically, the present invention relates to a tape-type disposable diaper that can be easily attached to a fastening tape when a diaper is worn and can provide a good wearing feeling.

  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 adherent portion disposed on the front body of the absorbent main body 14. Thus, 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, for example, when an infant is to wear such a tape-type disposable diaper, if the infant stays still without moving, the fastening tape can be stretched to the front body side to easily wear the diaper. However, since many infants move violently when wearing diapers, there is a problem that it takes time to wear them. In particular, development of a tape-type disposable diaper that can be easily exchanged (weared) is demanded in situations where there is no room in time due to childcare.

  In addition, the side flaps of tape-type disposable diapers are entirely formed of a uniform sheet of material. Therefore, when a diaper is to be worn by a child who moves violently as described above, the fastening tape is stretched. It may have passed too tightly around the waist, or on the contrary, the fastening tape may not be stretched sufficiently, and the waist may be loosened. There was also a problem that it was difficult to wear.

  The present invention has been made to solve such problems of the prior art, and when wearing a diaper, the fastening tape can be easily fastened and a good wearing feeling can be obtained. The present invention provides a tape-type disposable diaper that can be used.

  As a result of intensive studies to solve the problems of the prior art as described above, the present inventor stopped the side flap to which the fastening tape is connected from the root side portion extending from the absorbent main body. The present invention has been completed by conceiving that the above-mentioned problems can be solved by configuring the tip side portion to which the adhesive tape is connected to expand and contract with a small force. 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 tape-type disposable diaper provided with a side flap and a fastening tape disposed at a tip portion of the side flap for fixing the front body and the back body, wherein the side flap is And the elastic member formed in a film shape, and the side flap is a separate member disposed on both side edges of the back body of the absorbent main body, and the fastening The tape is provided with a hook material attached to one end side of the base material, the base side portion of the side flap and the tip side portion of the side flap are both stretchable, and Side flap root The extension stress Pb in the tension direction of the fastening tape in the original side portion is configured to be larger than the extension stress Pa in the tension direction of the fastening tape in the tip side portion of the side flap. Do Ri, in the portion of the distal-side, the fastening tape of tensile the stretch stress at 50% elongation in the direction _{Pa (50)} is a 1.5~4N / 25mm, in the portion of the base side, wherein The extension stress Pb ₍₅₀₎ at the time of 50% extension in the tension direction of the fastening tape is 2.5 to 7.5 N / 25 mm, and the extension stress Pb ₍₅₀₎ is equal to the extension stress Pa ₍₅₀₎ . A tape-type disposable diaper configured to be 1.5 to 2.5 times in size .

[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 [ 1 ] or [ 2 ], wherein the stretchable elastic body is stuck to a sheet constituting the side flap in an extended state.

[4] the side flaps, tape type disposable diaper according to any one of comprising said stretchable elastic member [1] to [3] with three different elastic modulus.

[5] The side flaps may comprise the stretch elastic body having the same modulus of elasticity, between said root portion and said tip end portion of the stretch elastic body, the side flaps in different stretched state The tape-type disposable diaper according to [ 3 ], which is stuck to a sheet to be configured.

[6] The side flaps may comprise the stretch elastic body having the same elastic modulus, the elongation elastic body, than the portion of the distal-side, said being larger amounts disposed portion of the base side The tape-type disposable diaper according to [1].

[7] The side flaps may comprise a film of the stretchable elastic material having the same elastic modulus, the film shape formed the stretched elastic body, are stacked in two or more layers in a portion of the base side The tape-type disposable diaper according to the above [ 1 ], which is arranged in a state of being caught.

[ 8 ] The stretchable elastic bodies are respectively disposed in the base side portion and the tip end portion, and two or more stretch elastic bodies are provided at a central portion in a direction from the root side to the tip end side of the side flap. The tape-type disposable diaper according to any one of the above [ 1 ] to [ 7 ], which is disposed in a state where the body overlaps.

  According to the present invention, when wearing a diaper, the fastening tape can be simply fastened and a good wearing feeling can be obtained.

  That is, in the tape-type disposable diaper of the present invention, the side flap to which the fastening tape is connected has a tip side portion to which the fastening tape is connected rather than the root side portion that extends from the absorbent main body. Because it is configured to expand and contract with a small force, it is possible to easily stretch the fastening tape and fix it to the front body when changing diapers in situations where infants etc. are rampant and there is no time allowance The diaper can be changed in a short time.

  In particular, when wearing a diaper, even if the fastening tape (in other words, the side flap connected to the fastening tape) is stretched and attached slightly, the force is then dispersed within the side flap, so it is appropriate. It becomes a wearing state and can obtain a good wearing feeling. In other words, for infants who move around, the force is distributed by the side flaps even if the fastening tape is attached to a little stronger (tight) while holding down the movement firmly, while wearing diapers, A good wearing feeling can be obtained.

It is a top view showing one embodiment of a tape type disposable diaper of the present invention, and is a figure showing the state where a tape type disposable diaper was developed and it looked 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. It is a top view which shows an example of the side flap of the tape type disposable diaper of this invention. 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 which shows the other 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 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 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:
Drawing 1 is a top view showing one embodiment of a tape type disposable diaper of the present invention, and is a figure showing the state where a tape type disposable diaper was developed and it looked from the top sheet side. FIG. 2 is an enlarged view of the side flap of the tape-type disposable diaper shown in FIG. 1, and FIG. 3 is a plan view showing an example of the side flap of the tape-type disposable diaper of the present invention.

  As shown in FIGS. 1 to 3, 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 base portion 8 b of the side flap 8 is the tip side of the side flap. It is the tape-type disposable diaper 1 comprised so that it may become larger than the extensional stress Pa in the tension direction X of the fastening tape 10 in the part 8a.

  The tape-type disposable diaper 1 of the present invention including the side flap 8 configured as described above can easily fasten the fastening tape 10 when wearing the diaper, and obtains a good wearing feeling. be able to.

  That is, in the tape-type disposable diaper 1 of the present invention, the side flap 8 to which the fastening tape 10 is connected is connected to the fastening tape 10 rather than the base portion 8b extending from the absorbent main body 14. Since the distal end portion 8a is configured to be expanded and contracted with a small force, the fastening tape 10 can be easily stretched when changing the diaper in a situation where an infant or the like violates and there is no time allowance. It can be fixed to the front body 2 and the diaper can be changed in a short time.

  In particular, when the diaper is worn, even if the fastening tape 10 (in other words, the side flap 8 connected to the fastening tape 10) is stretched and attached slightly, the force is dispersed in the side flap 8 thereafter. Therefore, it will be in a suitable wearing condition and a good wearing feeling can be obtained. That is, for infants who move around, the force is distributed by the side flaps 8 even when the fastening tape 10 is attached to a slightly stronger (tight) tightly so that the movement is sealed. Can obtain a good wearing feeling.

  For example, the side flap of a conventional tape-type disposable diaper is formed of a sheet of uniform material as a whole. The tension around the waist becomes too tight, or the fastening tape cannot be stretched sufficiently and the waist becomes loose. ) Is extremely difficult to wear.

  Since the side flap 8 of the tape-type disposable diaper 1 of the present invention is configured so that the distal end portion 8a to which the fastening tape 10 is connected can be expanded and contracted with a small force, after the diaper is worn, The force applied to the surroundings can be offset between the tip-side portion 8a and the root-side portion 8b, thereby providing a more appropriate wearing state.

  Moreover, in the tape-type disposable diaper 1 of this invention, the effect that the front-end | tip part 8a of the side flap 8 has a stretching property is as follows. The hook material of the mechanical fastener used for the fastening tape 10 is one in which, for example, about several hundred to about 2,000 hook-shaped protrusions are provided per 1 inch square. The engaging force is exerted when the projection is pressed against the loop material paired with the hook material. Therefore, the hook material is applied with a little shearing force after being pressed against the pair of loop members, that is, when it is pulled sideways, the engagement force is increased and stabilized. In the present invention, since the stretchability is imparted to the distal end portion 8a of the side flap 8, when the fastening tape 10 is engaged, the side flap 8 can be in an extended state. For this reason, when the side flap 8 contracts, there is an effect that the hook material can be more firmly engaged with the fastening tape 10.

  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). In the present invention, when the fastening tape is extended in a direction perpendicular to the side edge of the absorbent main body, the "direction perpendicular to the side edge of the absorbent main body" It becomes the tension direction of the tape.

  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 fastens 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, a portion 8a on the distal end side of the side flap 8 and a portion 8b on the root side of the side flap 8 are cut out to have a length of 40 mm and a width of 25 mm. 9 (9a, 9b) is produced. When the test piece 9 is manufactured, the length direction of the test piece 9 is set to be the tensile direction of the fastening tape 10. Moreover, when producing the test piece 9, it is preferable to produce so that the centerline of the width direction of the side flap 8 may turn into the centerline of the length direction of the test piece 9, as shown to FIG. 4A. 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 (in FIG. 4B, the case of the test piece 9a produced from the tip side portion of the side flap) is shown with a distance between chucks of 20 mm. The tensile tester 60 is fixed. In addition, when fixing to the chuck 62, both ends in the length direction of the test piece 9 are fixed to the chucks 62 and 62, respectively. FIG. 4B shows an example in which the end of 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 longitudinal direction of the test piece 9 is the tensile direction Y of the tensile tester 60.

  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, the test piece is a rectangle of 40 mm × 25 mm for convenience of measurement. For example, a test piece having a width of 25 mm is cut out from the tip side portion and the root side portion of the side flap. If the extension stress can be measured so that the distance between chucks is 20 mm, the same measurement results as those shown in FIGS. 4A to 4C can be obtained.

  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 of the present invention includes side flaps 8 extending from both side edges 6 a and 6 b of the back body 6 of the absorbent main body 14. 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 according to the present invention is such that the extension stress Pb in the tensile direction X of the fastening tape 10 at the base side portion 8b of the side flap 8 is Since it is comprised so that it may become larger than the extensional stress Pa in the tension | pulling direction X of the wearing tape 10, when wearing a diaper, the fastening tape 10 can be fastened easily and a favorable wearing feeling Can be obtained.

In addition, the magnitude | size of the concrete extension stress Pa and Pb of the part 8a of the front end side of the side flap 8 and the base part 8b 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, the extension stress at the time of 50% extension in the end portion 8a of the side flap 8 Pa ₍₅₀₎ is Ri 1.5~4N / 25mm der, it is favorable preferable is 2~3N / 25mm.

If the extension stress Pa ₍₅₀₎ at 50% extension in the tip side portion 8a is less than 1.5 N / 25 mm, the strength of the tip side portion of the side flap is lowered and the side flap is damaged. If it exceeds 4 N / 25 mm, the extension stress becomes excessively large, and the tip end portion 8 a may not be sufficiently extended.

Further, tensile stress _{Pb (50)} of the base side portion 8b, at 50% elongation of the side flaps 8, 2.5~7.5N / 25mm der is, it is better good is 4~6N / 25mm Yes.

In addition, when the extension stress Pb ₍₅₀₎ at the time of 50% extension in the root portion 8b is less than 2.5 N / 25 mm, when the fastening tape 10 is pulled strongly, the root side together with the tip portion 8a Part 8b also stretches, so if the waist is tightened too much, it may be difficult to relieve the force, and if it exceeds 7.5 N / 25 mm, the elongation stress of the root part 8 b The force applied to the tip side portion 8a cannot be relieved, and only the tip side portion 8a may remain fully extended. Note that the extension stress Pb ₍₅₀₎ is larger than the extension stress Pa ₍₅₀₎ even in the preferable range of the extension stress. Further, tensile stress _{Pb (50),} the Ru 1.5 to 2.5 times the size der stretch stress _{Pa (50).} In this case, the tip side portion 8a extends too much from the root side portion 8b, and the root side portion 8b cannot be extended, or the root side portion 8b easily extends and the tip side portion 8a becomes The effect of the present invention described above can be obtained satisfactorily without being sufficiently stretched.

  In the present invention, when the side flap is divided into two parts, that is, a tip side part and a root side part, a range of 30 to 70% on the tip side in the tension direction of the fastening tape of the side flap is set to the tip side. Further, the range of 30 to 70% on the root side is defined as the root side portion.

  Such a side flap can be formed by, for example, a sheet made of a breathable water-repellent material or the like in which a stretchable elastic body is disposed, or a sheet in which the stretchable elastic body is configured in a film shape.

  For example, the side flap 8 shown in FIG. 3 has a stretchable elastic body formed in a film shape. More specifically, the side flap 8 shown in FIG. 3 includes film-like stretchable elastic bodies 54a and 54b having the same elastic modulus, and the stretched elastic bodies 54a and 54b formed in a film shape are provided on the root side. In the state laminated | stacked on the part 8b of two or more layers, it arrange | positions at the sheet | seat 58 which comprises the side flap 8. FIG. The stretched elastic body 54b laminated in two or more layers forms a base-side portion 8b having a large tensile stress Pb, and the extensible elastic body 54a forms a tip-side portion 8a having a small tensile stress Pa. . FIG. 3 shows an example in which one layer (one piece) of the elastic elastic body 54a is disposed on the distal end portion 8a and two layers of the elastic elastic body 54b are laminated on the base portion 8b.

  In such a side flap 8 in which the elastic elastic body 54b is disposed in a state where two or more layers are laminated on the base portion 8b, the root portion 8a has stiffness, so the fastening tape absorbs the side flap 8 It is hard to come off the sex body. As the film-like stretchable elastic bodies 54a and 54b, film-like stretchable elastic bodies having different elastic moduli are used, and the extension stress Pb in the base portion 8b is greater than the extension stress Pa in the tip portion 8a. May be arranged so as to be large.

  In the tape-type disposable diaper of the present invention, for example, as shown in FIG. 5, the side flap 8 has two types of elastic elastic bodies 55a and 55b formed in a film shape, and these elastic elastic bodies 55a and 55b may be arranged in parallel with the tip side portion 8a and the root side portion 8b, respectively. Here, FIG. 5 is a top view which shows the other example of the side flap of the tape-type disposable diaper of this invention. In FIG. 5, an example in which the stretchable elastic body 55a is arranged so as to cover the entire region of the tip side portion 8a and the root side portion 8b, and the stretchable elastic body 55b is placed on the root side portion 8b. Is shown.

  By configuring in this way, it is only necessary to select a film-like stretchable elastic body having a different extension stress, which simplifies the manufacturing facility. 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 are easy to use.

  Further, in the tape-type disposable diaper of the present invention, the elastic elastic bodies are respectively arranged on the tip side portion and the root side portion, and at the center portion in the direction from the root side to the tip side of the side flap, You may arrange | position in the state which the above elastic elastic body overlapped. For example, in FIG. 6, the side flap 8 has two types of stretchable elastic bodies 56a and 56b formed in a film shape, and these stretchable elastic bodies 56a and 56b are connected to the distal end portion 8a and the root side. An example is shown in which the elastic elastic bodies 56a and 56b are arranged in a state of being overlapped with each other at the center portion 8c in the direction from the root side to the tip side of the side flap 8 respectively. .

  With this configuration, the force pulling the tab of the fastening tape is easily transmitted to the elastic elastic body 56b through the elastic elastic body 56a, and the elastic elastic body 56b is easily extended.

  Further, as shown in FIG. 7, the side flap 8 has a stretchable elastic body 57 formed in a film shape. This stretchable elastic body 57 includes a zone 57b having a high extension stress and a zone 57a having a low extension stress. It may be formed so as to be continuous. Since such a side flap 8 comprises a stretchable elastic body necessary for the tape-type disposable diaper of the present invention by a single continuous film, the manufacturing equipment becomes simple.

  Here, FIG.6 and FIG.7 is a top view which shows the further another example of the side flap of the tape-type disposable diaper of this invention.

  As a stretchable elastic body formed in a film shape used for the side flap 8 as shown in FIG. 3, for example, a material made of a thermoplastic elastomer can be cited as a preferred 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.

  Further, as the sheet 58 constituting the side flap 8, 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.

  In the case where the stretchable elastic body is disposed on the sheet constituting the side flap, it can be fixed by, for example, 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.

  Furthermore, the tape-type disposable diaper of the present invention may include stretchable elastic bodies 50a and 50b having two or more different elastic moduli as shown in FIG. More specifically, in the side flap 8 shown in FIG. 8, 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 stretchable elastic bodies 50a and 50b having two or more different elastic moduli, a base portion 8b having a large tensile stress Pb and a tip portion 8a having a small tensile stress Pa are formed. In addition, although the side flap 8 shown in FIG. 8 has shown the example at the time of using two types of expansion-contraction elastic bodies 50a and 50b, for example, although illustration is abbreviate | omitted, the part by the side of the base with large expansion | extension stress Pb and As long as it can form a portion on the tip side with a small extensional stress Pa, it may be a side flap including stretchable elastic bodies having three different elastic moduli.

  In such a side flap 8 including the elastic elastic bodies 50a and 50b having two or more different elastic moduli, the tip side portion 8a is more easily extended than the root side portion 8b. For this reason, after the diaper is worn, the force applied around the waist can be offset between the tip-side portion 8a and the root-side portion 8b, thereby providing a more appropriate wearing state. That is, even if the fastening tape 10 is stretched and tightened somewhat tightly, after wearing the diaper, the root-side portion 8b can be gradually extended to shift to an appropriate tightening state.

  Moreover, in the tape-type disposable diaper of the present invention, for example, as shown in FIG. 9, the tape-type disposable diaper includes stretchable elastic bodies 51 a and 51 b having the same elastic modulus, and includes a tip side portion 8 a and a root side portion 8 b. The elastic elastic bodies 51a and 51b may be adhered to the sheet 58 constituting the side flap 8 in different stretched states. That is, in the side flap 8 shown in FIG. 9, by making the extension states of the elastic elastic bodies 51a and 51b different, a tip side portion 8a having a small extension stress Pa and a root side portion having a large extension stress Pb. 8b. 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. 8 can be used.

  In the side flap 8 in which the elastic elastic bodies 51a and 51b are stuck to the sheet 58 in different stretched states as described above, the side flaps 8 have different areas of contraction (that is, the tip side portion and the root side portion). Since it can be easily discriminated that there are two, the side flap 8 can be used while the user is consciously extending each region. Here, FIG.8 and FIG.9 is a top view which shows the further another example of the side flap of the tape-type disposable diaper of this invention.

  Although not shown in the drawings, for example, if the side flaps have a small extension stress Pa at the tip side portion and a large extension stress Pb at the root side portion, stretchable elastic bodies having different elastic moduli, It may be a side flap constructed by being stuck to a sheet in a different stretched state.

  Further, in the tape-type disposable diaper of the present invention, for example, as shown in FIG. 10, the elastic elastic bodies 52a and 52b having the same elastic modulus are included, and the elastic elastic bodies 52a and 52b are provided on the distal end side portion 8a. Instead, the side flaps 8 may be arranged in a larger amount in the base portion 8b. That is, in the side flap 8 shown in FIG. 10, by arranging a large amount of the elastic elastic body 52b in the root portion 8b, the extension stress Pb of the root portion 8b is compared with the tip portion 8a. It is configured to be large.

  Such a side flap 8 in which a large amount of the elastic elastic body 52b is arranged on the base portion 8b can be distinguished from the difference in extension force in appearance, so that the user can use it while extending the side flap consciously. can do.

  For example, as shown in FIG. 11, after the same amount of extension elastic bodies 53a and 53b are arranged in the tip side portion 8a and the base side portion 8b, the extension elastic body 53a arranged in the tip side portion 8a. A side flap 8 may be used in which a part of 'is cut and snapped back so that the contraction force of the cut elastic elastic body is not applied. Thus, by cutting a part of the elastic elastic body 53a ′ of the distal end side portion 8a, the amount of the elastic elastic body 53b of the root portion 8b is relatively similar to a side flap as shown in FIG. Can be increased.

  Here, FIG.10 and FIG.11 is a top view which shows the further another example of the side flap of the tape-type disposable diaper of this invention. In addition, the code | symbol 59 in FIG. 11 shows the cut | interruption which cut | disconnected a part of expansion | extension elastic body 53a '.

  10 and 11 show an example in which a stretchable elastic body having the same elastic modulus is used. However, the extension stress Pa of the tip side portion is small, and the extension stress Pb of the root side portion is shown. If the side flap is large, stretch elastic bodies having different elastic moduli may be used, and further, the amount of the stretch elastic bodies arranged on the sheet may be different.

  Further, as the elastic elastic bodies 50a and 50b as shown in FIG. 8, 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.

[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 fastening tape tension direction at the base flap side portion of the side flap is the tensile stress in the fastening tape tensile direction at the tip side portion of the side flap. As long as it is configured to be greater than Pa, there is no particular limitation on the configuration of the absorbent main body. For example, the absorbent main body configured in the same manner as the absorbent main body used in a conventionally known tape-type disposable diaper. 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 a liquid-impermeable sheet that does not allow urine to pass through to prevent urine absorbed by the absorber from leaking to the outside of the absorbent main body, or it does not easily pass through urine, but can be transmitted by applying pressure. It is preferable that the liquid low permeability sheet is 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. The fastening tape 10 is formed with a fastener portion 44 made of a hook material 44a of a mechanical fastener in the vicinity of the tip of a base material 48 made of cloth, for example. 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 according to the present invention, the distal end portion 8a and the root portion 8b of the side flap 8 are configured to have different tensile stresses. When the side tape 8 is pulled to the side 2, the front side portion 8a of the side flap 8 is further expanded. In this state, after the fastening tape 10 is fixed to the front body 2, the force applied to the side flap 8 (in other words, If this is the case, the partial extension state of the side flaps is offset (buffered) between the tip side portion 8a that extends with a small force and the root side portion 8b that extends with a larger force, thereby providing a good feeling of wear. Can be obtained.

[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, to form a film-like thermoplastic elastomer for constituting a stretchable elastic body disposed at the tip side portion and a stretchable elastic body disposed at the root side portion A film-like thermoplastic elastomer is prepared. As the thermoplastic elastomer for constituting the stretchable elastic body arranged at the tip side portion, a thermoplastic elastomer having a lower tensile stress than the thermoplastic elastomer arranged at the root side portion is used.

  And the elastic elastic body which consists of these thermoplastic elastomers is arrange | positioned in parallel, and the arrange | positioned elastic elastic body is sandwiched (nonclamped) with a nonwoven fabric. 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

  A film made of a thermoplastic elastomer can be bonded to a non-woven fabric with a hot melt adhesive, or can be bonded together by hot embossing. The fastener portion 44 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 inward, and the obtained side flap is attached to the absorbent main body. At the predetermined position of the continuum, the outer side opposite to the absorption surface is attached by heat sealing. Then, the side tab 38 is affixed with the hot melt adhesive at a predetermined position of the absorbent main body. The tape-type disposable diaper of this invention can be manufactured by cut | disconnecting the continuous body of the absorptive main body which such a side flap 8 and the side tab 38 were 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 flap, 8a: tip side portion (side flap tip side portion), 8b: root side portion (side flap root side portion), 8c: central portion (side flap root) 9), 9, 9a, 9b: Test piece, 10, 110: Fastening tape, 14: Absorbent body, 18: Sheet (inner surface sheet), 20: Sheet (outer surface sheet) 22: Absorber, 26, 26a, 26b: Solid gather, 36, 36a, 36b: Solid gather elastic material, 38: Side tab, 40: Elastic material around leg, 42 Elastic material around waist, 44: Fastener part, 44a: Hook material, 48 Base material, 50a, 50b, 51a, 51b, 52a, 52b, 53a, 53a ′, 53b: stretchable elastic body, 54a, 54b, 55a, 55b, 56a, 56b, 57: stretchable elastic body (formed in a film shape) Stretched elastic body), 57a: Zone with low tensile stress, 57b: Zone with high tensile stress, 58: Sheet (sheet constituting the side flap), 59: Cut, 60: Tensile tester, 62: Chuck, X: Stop Tensile direction of adhesive tape, Y: Tensile direction of tensile tester.

Claims (8)

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 tape-type disposable diaper provided with a fastening tape for fixing the front body and the back body, which is disposed at a tip portion of the side flap,
The side flap includes a stretchable elastic body formed in a film shape, and the side flap is a separate one disposed on both side edges of the back body of the absorbent main body, and ,
The fastening tape is a hook material attached to one end side of the base material,
Both the base flap side portion and the side flap tip side portion have elasticity, and the extension stress Pb in the tension direction of the fastening tape in the side flap root portion is: at the tip end portion of the side flaps, Ri Na are configured to be larger than the tensile stress Pa in the pulling direction of the fastening tape,
The extension stress Pa ₍₅₀₎ at the time of 50% extension in the tension direction of the fastening tape in the tip side portion is 1.5 to 4 N / 25 mm, and the fastening tape in the root side portion is The tensile stress Pb ₍₅₀₎ at 50% elongation in the tensile direction is 2.5 to 7.5 N / 25 mm, and the tensile stress Pb ₍₅₀₎ is 1.5 to 2 of the tensile stress Pa ₍₅₀₎ . A tape-type disposable diaper constructed to be 5 times larger .   The tape-type disposable diaper according to claim 1, wherein the side flap includes the stretchable elastic body having two or more different elastic moduli.   The tape-type disposable diaper according to claim 1 or 2, wherein the stretchable elastic body is stuck to a sheet constituting the side flap in an extended state.   The tape-type disposable diaper according to any one of claims 1 to 3, wherein the side flap includes the stretchable elastic body having three different elastic moduli. The side flap comprises the stretchable elastic body having the same elastic modulus,
The tape-type disposable diaper according to claim 3, wherein the elastic elastic body is stuck to a sheet constituting the side flap in a different stretch state between the root side portion and the tip side portion. 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 arranged in a larger amount in the base side portion than in the tip side portion. The side flap comprises a film-like stretchable elastic body having the same elastic modulus,
The tape-type disposable diaper according to claim 1, wherein the stretched elastic body formed in the film shape is disposed in a state where two or more layers are laminated on the root side portion.   The stretchable elastic bodies are respectively arranged on the root side portion and the tip side portion, and two or more stretchable elastic bodies overlap at a central portion in a direction from the root side to the tip side of the side flap. The tape-type disposable diaper as described in any one of Claims 1-7 arrange | positioned in the state.

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