JP2019187716A - Underpants-type disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pants-type disposable diaper which prevents the waste tape from being excessively extended and has excellent workability in which the diaper is put into a discarding form. SOLUTION: A disposal tape 10 is provided on the outer surface of a diaper 1. The discarding tape 10 has the fixing portion 12, the intermediate portion 15, and the fastening portion 18 arranged in this order along the longitudinal direction X1 of the discarding tape 10, and is in a three-fold state in which the fixing portion 12, the intermediate portion 15, and the fastening portion 18 are stacked in this order. Has become. The fastening portion 18 and the intermediate portion 15 are detachably joined together, and the intermediate portion 15 and the fixed portion 12 are also detachably joined together. The fastening portion 18 and the intermediate portion 15 are extendable in the longitudinal direction X1 of the discarding tape 10 in the expanded state where the three-fold state is released. The tensile strength at which the fastening portion 18 starts expanding is higher than the tensile strength at which the intermediate portion 15 starts expanding. [Selection diagram] Fig. 4

Description

  The present invention relates to a pants-type disposable diaper provided with a disposal tape.

  From the viewpoint of easily and hygienically discarding disposable diapers, diapers having a disposal tape capable of maintaining the disposable diaper in a rolled state are known. As the disposal tape, a tape having an extendable portion has been proposed from the viewpoint of workability for rolling the diaper and maintaining the diaper in a rolled state. For example, the applicant of the present invention has previously proposed a fastening tape having an extendable portion that is continuously connected to the base (Patent Document 1).

  Patent Document 2 also includes adjacent first and second tape tab elements and a plastically deformable stretchable film having an intermediate portion between two ends, and one end of the film is A laminated disposable tape tab is described wherein the first surface of the first tape tab element has the other end of the film bonded to the first surface of the second tape tab.

JP-A-9-99010 Special table 2009-507570

According to Patent Document 1, since the length increases due to the extension of the disposal tape, the diaper can be easily rounded and the diaper can be easily maintained in a rounded state. According to Patent Document 2, the tab can be extended by holding one end of the tape tab, and as a result, the tab can be sufficiently stretched to wrap around the product.
However, waste tapes having stretchable portions may break if stretched excessively. In addition, an operator who uses a disposal tape to roll a diaper into a disposal form sometimes uses the disposal tape without sufficiently extending it because of fear of breaking the disposal tape.
Patent Documents 1 and 2 do not disclose a technique for preventing the waste tape from being excessively stretched.

  The subject of this invention is providing the underpants type disposable diaper which can eliminate the fault which the prior art mentioned above has.

  The present invention has a waist opening and a pair of leg openings, and in the worn state, the abdomen disposed on the abdomen side of the wearer, the crotch part disposed on the crotch part, and the dorsal side disposed on the dorsal side A pants-type disposable diaper having a portion, wherein a disposal tape is provided on an outer surface of the disposable diaper, and the disposal tape is fixed to an outer surface of the disposable diaper, and an intermediate portion And the fastening portion are arranged in this order along the longitudinal direction of the disposal tape, and are disposed in this order in a tri-fold state, and the waste in the tri-fold state. The tape for use is detachably joined between the fastening portion and the intermediate portion, and is also detachably joined between the intermediate portion and the fixed portion. The middle part is in the unfolded state after releasing the tri-fold state. The pants-type disposable diaper can be extended in the longitudinal direction of the disposal tape, and the tensile strength at which the fastening portion starts to expand is higher than the tensile strength at which the intermediate portion starts to expand. is there.

  ADVANTAGE OF THE INVENTION According to this invention, it is excellent in the workability | operativity which makes a diaper a disposal form while preventing extending | stretching the disposal tape too much.

FIG. 1 is a perspective view showing an embodiment of a pants-type disposable diaper of the present invention. FIG. 2 is a developed plan view schematically showing the skin facing surface side in the developed and extended state of the pants-type disposable diaper shown in FIG. 1. FIG. 3 is a perspective view showing a disposal form of the pants-type disposable diaper shown in FIG. 1. FIG. 4 is a cross-sectional view showing the structure of a disposal tape provided in the pants-type disposable diaper shown in FIG. 5 (a) and 5 (b) are perspective views showing a state in which the disposal tape for the pants-type disposable diaper shown in FIG. 1 is extended. FIG. 6 is a perspective view showing an arrangement example of the disposal tape according to the present invention.

  The present invention will be described below based on preferred embodiments with reference to the drawings. FIG. 1 shows an embodiment of a pants-type disposable diaper according to the present invention. A pants-type disposable diaper 1 (hereinafter, also simply referred to as “diaper 1”) shown in FIG. 1 is a type of worn article that is used by being worn on the lower abdomen of a wearer.

As shown in FIG. 1, the diaper 1 is a pants-type disposable diaper having a waist opening 1W through which the wearer's torso is passed and a pair of leg openings 1L, 1L through which the wearer's lower limb is passed. Yes.
The diaper 1 includes an absorbent main body 4 having a top sheet, a back sheet, and an absorbent body 40, and an exterior body 5 disposed on the non-skin facing surface side of the absorbent main body 4. The exterior body 5 forms the non-skin facing surface of the diaper 1, that is, the outer surface of the diaper 1.

  In the present specification, the “skin-facing surface” is a surface of the diaper 1 that is an absorbent article or a component thereof (for example, the surface sheet 2) that is directed toward the wearer's skin when worn, that is, relatively wearer's skin. It is the side close to the skin, and the “non-skin facing surface” is a surface of the diaper 1 or a component thereof directed to the side opposite to the skin side (clothing side) when worn, that is, relatively far from the wearer's skin. On the side. In addition, "at the time of wearing" here means the state in which the normal proper wearing position, that is, the correct wearing position of the diaper 1 is maintained.

  The diaper 1 includes an abdominal side A disposed on the wearer's belly side, a crotch C disposed on the crotch portion, and a dorsal side B disposed on the back of the wearer in the worn state. In the diaper 1, both side edges along the longitudinal direction X of the exterior body 5 in each of the abdominal side A and the back side B are joined to each other by known joining means such as an adhesive, heat seal, ultrasonic seal and the like. Yes. Thereby, the above-mentioned waist opening 1W and a pair of leg openings 1L and 1L are formed.

  FIG. 2 shows the diaper 1 in the expanded and extended state. The “deployed and extended state” of the diaper 1 is defined as an unfolded state separated from a state in which both side edges along the longitudinal direction X of the exterior body 5 of the abdominal part A and the dorsal side part B are joined. The diaper 1 is a state in which the elastic member of each part is extended to the design dimension (same as the dimension when the diaper 1 is flattened in a state where the influence of the elastic member is completely eliminated).

The diaper 1 has a longitudinal direction X corresponding to a direction extending from the ventral side A to the back side B through the crotch C, and the diaper 1 in a state where the diaper 1 is spread in a plane as shown in FIG. It has a horizontal direction Y orthogonal to the direction X. The longitudinal direction X coincides with the longitudinal direction of the absorbent main body 4. As shown in FIG. 2, the diaper 1 is formed symmetrically with respect to a longitudinal center line CL that extends in the longitudinal direction X and bisects the diaper 1 in the transverse direction Y.
The absorbent main body 4 in the diaper 1 has a surface sheet 2 on the skin facing surface side and a back sheet 3 on the non-skin facing surface side, and has an absorbent body 40 between these two sheets 2 and 3. The absorbent body 40 is located on the entire surface of the crotch part C, and the top sheet 2, the back sheet 3, and the absorbent body 40, and at least the ventral part A and the back part B along the longitudinal direction X from the crotch part C. It extends to a part. In the diaper 1, the absorbent body 40 includes a liquid-retaining absorbent core 41 and a core wrap sheet 42 that covers the absorbent core 41, but the absorbent body 40 does not include a core wrap sheet. Not necessary.

  As shown in FIG. 2, the diaper 1 includes leak-proof cuffs 6 and 6 extending along the longitudinal direction X on both sides of the absorbent main body 4 along the longitudinal direction X. The leak-proof cuffs 6 and 6 include a water-repellent cuff forming sheet 61 continuous over the entire length of the absorbent body 4 in the longitudinal direction X, and the longitudinal direction X on the inner side of the lateral direction Y of the cuff forming sheet 61. And one or a plurality of cuff elastic members 62 fixed in an expanded state. The leak-proof cuffs 6 and 6 are fixed to the surface sheet via a cuff fixing portion (not shown) extending in the vertical direction X. The leak-proof cuffs 6 and 6 stand on the skin facing surface side by having the cuff elastic member 62.

  As materials used for the exterior member 5, the top sheet 2, the back sheet 3 and the absorber 40 included in the absorbent main body 4, and the leakage prevention cuffs 6, 6, etc., the materials used so far have been used in the technical field. Those similar to the above can be used without particular limitation.

  As shown in FIG. 1, a disposal tape 10 is provided on the back side B of the diaper 1. The disposal tape 10 is used for maintaining the disposal form of the diaper 1. The disposal tape 10 is located at a substantially central portion in the lateral direction Y in the back side portion B of the diaper 1. The disposal tape 10 is provided such that the longitudinal direction thereof coincides with the longitudinal direction X of the diaper 1.

  FIG. 3 shows a disposal form of the diaper 1 when it is discarded. When the diaper 1 is discarded, the diaper 1 is rolled up from the crotch part C toward the waist opening 1W so that the abdomen A is inward in the diaper 1 shown in FIG. make. In the rolled-up diaper 1, the disposal tape 10 provided on the back side B is exposed to the outside of the rolled up diaper 1. As will be described later, the disposal tape 10 is stretched in the longitudinal direction of the tape 10, and then wound around the outer periphery of the diaper 1 that has been disposed in a disposal form, thereby maintaining the diaper 1 in the disposal form.

  FIG. 4 shows a cross-sectional structure of the disposal tape 10 in a tri-fold state. The disposal tape 10 is mainly composed of three parts. Specifically, the disposal tape 10 includes a fixing part 12, an intermediate part 15, and a fastening part 18. These three parts are arranged in this order along the longitudinal direction X1 of the disposal tape 10. Further, these three parts are in a three-fold state where they are stacked in this order. No other member is interposed between the fixed portion 12 and the intermediate portion 15, and both are directly connected. Similarly, no other member is interposed between the intermediate portion 15 and the fastening portion 18, and both are directly connected.

  The fixing part 12 in the disposal tape 10 has a fixing part sheet piece 13. The sheet piece 13 for fixing | fixed part has the 1st surface 13a and the 2nd surface 13b. In the disposal tape 10 in the three-folded state, the fixing portion sheet piece 13 has a first surface 13a facing the intermediate portion 15 and a second surface 13b of the diaper 1 except for a folded portion 13 'which will be described later. Opposite the outer surface. The fixing part 12 has a fixing part adhesive part 14. The fixing portion adhesive portion 14 is provided on the second surface 13 b of the fixing portion sheet piece 13. The fixing part 12 is fixed to the outer surface of the back side part B in the diaper 1 by a fixing part adhesive part 14. The disposal tape 10 is detachably fixed to the outer surface of the back side portion B of the diaper 1 through the fixing portion adhesive portion 14. As a method for fixing the disposal tape 10 to the outer surface of the diaper 1, a known method such as an adhesive such as a hot-melt adhesive or a fusion can be used.

  The intermediate portion 15 of the disposal tape 10 is a portion that easily stretches with a relatively weak tensile force when a tensile force is applied to the disposal tape 10 and increases the length of the disposal tape 10. The intermediate portion 15 has an intermediate portion sheet piece 16. The intermediate portion sheet piece 16 may have the same length as the fixing portion sheet piece 13 described above, or may have a different length. Further, the intermediate portion sheet piece 16 may have the same width as the fixed portion sheet piece 13 or may have a different width. The intermediate portion sheet piece 16 has a first surface 16a and a second surface 16b. In the waste tape 10 in the three-fold state, the intermediate sheet piece 16 has a first surface 16a facing the fastening portion 18 and a second surface 16b fixed portion, except for a folded portion 16 'described later. 12 is opposed. In addition, the intermediate portion 15 has an intermediate portion adhesive portion 17. The intermediate portion adhesive portion 17 is provided on the second surface 16 b of the intermediate portion sheet piece 16. The intermediate part adhesive part 17 joins the intermediate part 15 and the fixed part 12 in the three-folded state of the disposal tape 10 in a peelable manner. Therefore, it is preferable that the adhesive part 17 for intermediate | middle parts is comprised from the low-adhesive adhesive.

  In the fixing portion 12 described above, the fixing portion sheet piece 13 has a folded portion 13 ′ in which one end in the longitudinal direction X <b> 1 of the disposal tape 10 is folded back to the intermediate portion 15 side. The folded portion 13 ′ is joined to one end of the intermediate portion sheet piece 16 in the intermediate portion 15 on the second surface 16 b side. As a result, the fixed portion 12 and the intermediate portion 15 are directly connected to each other. As a method of connecting the fixing portion 12 and the intermediate portion 15, a known method such as an adhesive such as a hot-melt adhesive or a fusion can be used.

  The fastening portion 18 of the disposal tape 10 can be secured to an arbitrary position on the outer surface of the diaper 1. When the disposal form of the diaper 1 is maintained by the disposal tape 10, the fastening portion 18 is stopped on the outer surface of the diaper 1. It is the part to be worn. The fastening part 18 forms a tip region of the disposal tape 10 and has a fastening part sheet piece 19. The fastening portion sheet piece 19 may have the same length as the fixing portion sheet piece 13 or the intermediate portion sheet piece 16 or may have a different length. Further, the fastening portion sheet piece 19 may have the same width as the fixing portion sheet piece 13 or the intermediate portion sheet piece 16 or may have a different width. The sheet piece 19 for fastening part has the 1st surface 19a and the 2nd surface 19b. In the disposal tape 10 in the three-fold state, the second surface 19 b of the fastening portion sheet piece 19 faces the intermediate portion 15. Further, the fastening part 18 has a fastening part adhesive part 20. The adhesion part 20 for fastening parts is provided on the second surface 19b of the sheet piece 19 for fastening parts. The adhesive part 20 for the fastening part is detachably joined between the fastening part 18 and the intermediate part 15 in the disposal tape 10 in a tri-fold state, and the fastening part 18 is attached to the outer surface of the diaper 1. It is surely fixed at an arbitrary position. From this viewpoint, it is preferable that the degree of adhesiveness of the adhesive portion 20 for the fastening portion is determined.

The intermediate portion sheet piece 16 in the intermediate portion 15 described above is folded at one end in the longitudinal direction X1 toward the fastening portion 18 to form a folded portion 16 ′. The folded portion 16 ′ is joined to one end of the fastening portion sheet piece 19 in the fastening portion 18 on the second surface 19 b side. As a result, the intermediate portion 15 and the fastening portion 18 are directly connected to each other. As a method of connecting the intermediate portion 15 and the fastening portion 18, a known method such as an adhesive such as a hot-melt adhesive or a fusion can be used.
In addition, a grip piece 21 is joined to the other end of the fastening portion sheet piece 19 in the fastening portion 18 on the second surface 19b side. The knob piece 21 is a separate sheet piece from the fastening part sheet piece 19.

  As described above, the disposal tape 10 composed of three parts is folded in three in a Z-shape. Then, the disposal tape 10 is disposed so that the free end of the disposal tape 10 in a tri-fold state, that is, the attachment portion of the knob piece 21 in the fastening portion 18 faces the waist opening 1W side in the diaper 1. It is attached to the back side B of the diaper 1.

  The fastening portion 18 and the intermediate portion 15 can be extended in the longitudinal direction X1 of the disposal tape 10 in the unfolded state where the tri-fold state is released. Here, the unfolded state in which the tri-fold state is released means that the intermediate portion 15 and the fixing portion 12 of the disposal tape 10 are peeled, and the intermediate portion 15 and the fastening portion 18 are peeled. This means a state where the three-folded disposal tape 10 is linearly expanded. In the unfolded state, the disposal tape 10 can be stretched by human force, and at that time, the fastening portion 18 and the intermediate portion 15 can be stretched.

In the disposal tape 10, the tensile strength Pb at which the intermediate portion 15 starts to expand is lower than the tensile strength Pc at which the fastening portion 18 starts to expand. That is, by holding the fastening part 18 with a finger or the like and stretching it in the longitudinal direction X1 of the disposal tape 10, each of the fastening part 18 and the intermediate part 15 can be extended. In the process of stretching, the intermediate part 15 starts to extend before the fastening portion 18 (see FIG. 5A), and after the intermediate portion 15 has stretched to some extent, the fastening portion 18 starts to stretch (see FIG. 5B). Therefore, for example, when the fastening part 18 starts to extend, it is given as information that it should not be extended any more, so that the diaper 1 such as an infant's guardian or caregiver is put into a disposal form. A person can prevent the intermediate portion 15 from being excessively extended, and the intermediate portion can be prevented from breaking. Thereby, the operator can fully stretch the disposal tape 10 without excessively extending the intermediate portion 15. By using the disposal tape in a sufficiently stretched state, the disposal tape can be easily wound around the rolled up diaper, and the workability of making the diaper 1 into a disposal form is excellent.
“Information” about “giving information that it should not be extended any more” is, for example, a sentence “Please do not stretch further when the part being picked begins to stretch” It may be a symbol or a combination thereof, and such information is displayed on, for example, a diaper component, a diaper package, an advertisement on a diaper, or a homepage.

The tensile strength is a value determined without depending on the width of the disposal tape 10. The tensile strengths Pb and Pc at which the intermediate part and the fastening part start to extend are measured by the following method.
[Measurement method of tensile strength to start elongation]
About the disposal tape of a trifold state, an intermediate part is peeled from a fixing part, and it is set as the expansion | deployment state which canceled the trifold state. Next, the longitudinal direction of the disposal tape is made to coincide with the tensile direction, the distance between chucks is 10 mm, and each part such as an intermediate part is a tensile tester (for example, model “AUTOGRAPH AG-X” manufactured by Shimadzu Corporation). Attach to the chuck. The respective parts are attached to the chuck while avoiding joints with other adjacent parts. For example, when attaching an intermediate part, it avoids the junction location with a fixation part and the junction location with a fixing | fixed part, and attaches to a chuck | zipper between these both junction locations. Next, the film is pulled at a speed of 300 mm / min, and the tensile strength that changes with the tensile distance is measured. The tensile strength (N) at which the extension of each part starts is the strength of the first maximum point measured. The first maximum point is the maximum point that first appears in the measured tensile strength (N) curve. If the first maximum point is not clearly understood or not observed, the maximum load during elongation between 30% and 70% elongation is regarded as the strength of the first maximum point. In addition, the maximum value of the tensile strength that changes with the tensile distance is defined as the breaking strength, the time when the breaking strength is indicated is “at the time of breaking”, and the elongation at break is “100% elongation”. And

The tensile strength Pc at which the fastening portion 18 starts to expand is preferably lower than the breaking strength Pe of the intermediate portion 15. With such a configuration, when the fastening portion 18 starts to extend in the process of stretching the disposal tape 10, the operator can recognize that the limit is close to the extension of the intermediate portion 15. That is, the operator can stretch the disposal tape 10 to such an extent that the intermediate portion 15 is not broken.
The breaking strength (N) of each part such as an intermediate portion in the disposal tape is the maximum value of the tensile strength that changes with the tensile distance in the above-mentioned [Method of measuring tensile strength for starting elongation].

  From the viewpoint of more surely achieving the above effect, the ratio (Pe / Pc) of the breaking strength Pe of the intermediate portion 15 to the tensile strength Pc at which the fastening portion 18 starts to expand is preferably 2 or more, more preferably 3 Or more, preferably 6 or less, more preferably 5 or less, and preferably 2 or more and 6 or less, more preferably 3 or more and 4 or less.

From the same viewpoint as described above, it is preferable that the fastening portion 18 is configured to cause a visual change before and after extension. According to such a configuration, the worker can perceive the visual change of the fastening portion 18 along with the extension of the fastening portion 18, so that the operator can put the disposal tape so that the middle portion 15 that is being stretched does not break. The stretching force can be easily adjusted.
The visual change of the fastening part 18 includes a change in the color of the fastening part 18, a deformation of a figure or a symbol applied to the fastening part 18, or a combination thereof. Specifically, the fastening portion 18 may change from a dark color to a light color or from a light color to a dark color before or after expansion, or a figure or symbol may be expanded before or after expansion. For example, when the fastening portion 18 is stretched, the area ratio between the colored portion and the non-colored portion in the fastening portion 18 changes, so that a color change can be caused. In addition, as the fastening portion 18 is stretched, a figure or the like applied to the fastening portion 18 is also stretched, and the figure or the like can be deformed.

From the viewpoint of making the disposal tape 10 easy to stretch and preventing unintentional stretching, the tensile strength Pb at which the intermediate portion 15 starts to stretch is preferably 1.0 N or more, more preferably 3.0 N or more. It is preferably 6.5N or less, more preferably 5N or less, and preferably 1.0N or more and 6.5N or less, more preferably 3.0N or more and 5N or less.
From the viewpoint of easily extending the intermediate portion 15 prior to the fastening portion 18, the tensile strength Pc at which the fastening portion 18 starts to stretch is preferably 10N or more, more preferably 12N or more, and preferably 19 .5N or less, more preferably 15N or less, and preferably 10N or more and 19.5N or less, more preferably 12N or more and 15N or less.

  From the viewpoint of suppressing breakage of the disposal tape 10 in the process of stretching the disposal tape 10, the breaking strength Pf of the fastening portion 18 is preferably 20N or more, more preferably 25N or more, and preferably 50N or less. Preferably it is 45N or less, Preferably it is 20N or more and 50N or less, More preferably, it is 25N or more and 45N or less.

  From the viewpoint of suppressing the peeling of the fixing part 12 from the outer surface of the diaper 1 when pulling the disposal tape, the tensile strength Pc at which the fastening part 18 starts to extend is the peeling strength between the diaper 1 and the fixing part 12. Preferably it is lower than Pg. From the viewpoint of more surely achieving the above effect, the ratio (Pg / Pc) of the tensile strength Pc at which the fastening portion 18 starts to expand with respect to the peel strength Pg between the diaper 1 and the fixed portion 12 is preferably 3 More preferably, it is 4 or more, preferably 8 or less, more preferably 7 or less, and preferably 3 or more and 8 or less, more preferably 4 or more and 7 or less.

The peel strength Pg between the diaper 1 and the fixing part 12 is measured by the following method.
[Measurement method of peel strength between diaper and fixed part]
About the disposal tape of the trifold state in a diaper, it is made the unfolded state which canceled the trifold state. Next, make the longitudinal direction of the disposal tape coincide with the tensile direction, and the sheet that forms the fixed part and the outer surface of the diaper is attached to the chuck of a tensile tester (for example, model “AUTOGRAPH AG-X” manufactured by Shimadzu Corporation). Install in between. In this attachment, on the waste tape side, a portion other than the joining portion of the intermediate portion is attached to the chuck, and on the diaper side, a position 10 mm away from the end portion on the crotch side of the fixing portion in the longitudinal direction is attached to the chuck. The distance between chucks is 50 mm. Next, the diaper is stretched at a speed of 300 mm / min, the fixing part is peeled off from the outer surface of the diaper, and the maximum value of the tensile strength in the process is defined as the peel strength Pg between the diaper and the fixing part.

The diaper 1 has a high-rigidity region in which the absorbent core 41 exists on the inner side in the thickness direction, and a low-rigidity region that is less rigid than the high-rigidity region. Moreover, as for the diaper 1, the waist gathers WG and the leg gather LG are formed in the peripheral area of this diaper 1 (refer FIG. 1). The peripheral region refers to a region on the waist end side of the absorber 40. The waist gathers WG and leg gathers LG are often formed in a low rigidity region from the viewpoint of improving the stretchability.
From the viewpoint of stably applying a tensile force to the intermediate portion 15 and the fastening portion 18, at least a part of the fixing portion 12 is disposed in the high rigidity region located inside the low rigidity region. It is preferable. In this case, the entire fixing portion 12 may be disposed in the high rigidity region. “Inside the low-rigidity region” means being located inward in both the vertical direction X and the horizontal direction Y as compared with the low-rigidity region. As an aspect in which the disposal tape 10 is disposed in the high-rigidity region, for example, an aspect in which the inner side in the longitudinal direction of the fixing portion 12 partially overlaps the absorber 40 can be cited. In addition, as shown in FIG. 6, the fixing portion 12 may be arranged so that the entirety thereof overlaps the absorber 40.

  The tensile strength Pc at which the fastening portion 18 starts to stretch is determined by the intermediate portion 15 from the viewpoint of suppressing the stretched waste tape 10 from becoming excessively long and easily winding the waste tape around the diaper 1. The tensile strength is preferably higher than the tensile strength P3b at the time of three-fold elongation that has been elongated to three times the length before elongation. With such a configuration, the fastening portion 18 starts to be extended after the intermediate portion 15 has been extended three times or more of the length before the extension. Here, the length before and after extension of the intermediate portion 15 is the length before and after extension of a portion of the intermediate portion 15 that can be extended in the longitudinal direction X1.

From the viewpoint of more surely achieving the above effect, the ratio (Pc / P3b) of the tensile strength Pc at which the fastening portion 18 starts to expand with respect to the tensile strength P3b when the intermediate portion 15 is stretched three times is preferably 1. 5 or more, more preferably 2.0 or more, preferably 3.5 or less, more preferably 3.0 or less, and preferably 1.5 or more and 3.5 or less, more preferably 2.0 or more. 3.0 or less.
“Tensile strength at the time of extension of 3 times the length before extension” means that the length of the intermediate part in the process of pulling at a speed of 300 mm / min in the above-mentioned [Method of measuring tensile strength for starting extension] It is the tensile strength when it becomes three times the length before stretching.

  In the diaper 1, one or a plurality of elastic members 53, 54 extending along the lateral direction Y are in the vicinity of the waist opening 1 </ b> W or a part between the waist opening 1 </ b> W and the leg opening 1 </ b> L. It is arranged in the department. The leg opening 1L is provided with an elastic member 52 along the opening 1L, and the elastic member 52 has a portion extending along the vertical direction X. By expansion and contraction of these elastic members, the diaper 1 fits the wearer's body, the feeling of wearing the diaper 1 is improved, and excrement leakage is effectively prevented.

As described above, the diaper 1 includes the elastic member 62 that expands and contracts in the longitudinal direction X in the leak-proof cuff 6 in addition to the elastic member described above. A portion that expands and contracts in a predetermined direction such as the vertical direction X or the horizontal direction Y by such an elastic member or the like is hereinafter also referred to as an expandable portion.
The outer surface of the diaper 1 may be formed with unevenness due to the stretchability of the stretchable part, and if a disposal tape is disposed on the site where such unevenness is formed, there is a risk of unintentional peeling. is there. From the viewpoint of securely fixing the disposal tape 10 to the outer surface of the diaper 1, the fixing portion 12 is positioned so that the fixing portion 12 of the disposal tape 10 does not overlap the stretchable portion in plan view of the diaper 1. Is preferred. As such an aspect, in the longitudinal direction X, the end portion 12a on the crotch C side of the fixed portion 12 is positioned closer to the opening end 50 side of the waist opening 1W than the stretchable portion that expands and contracts in the longitudinal direction X. (See FIG. 2). In this case, the end portion 12a on the crotch C side of the fixing portion 12 is formed on the back side portion B of the elastic member 52 disposed along the end portion on the back side portion B side of the cuff elastic member 62 and the leg opening. It is distribute | arranged to the opening end 50 side of the waist opening part 1W rather than the edge part by the side of the back side B. FIG. That is, in the vertical direction X, the length L10 between the crotch C side end portion 12a of the fixing portion 12 and the waist opening end 50 of the back side portion B is the distance between the cuff elastic member 62 and the waist opening end 50. It is shorter than the length L12 between them and the length L14 between the elastic member 52 arranged at the leg opening and the waist opening end 50 (see FIG. 2).

From the viewpoint of more reliably joining the disposal tape 10 and the outer surface of the diaper 1, the length between the end portion 12a on the crotch C side of the fixing portion 12 and the waist opening end 50 of the back side portion B is set to L10. (See FIG. 2), and the length between the cuff elastic member 62 and the waist opening end 50 is L12 (see FIG. 2), the ratio of L12 to L10 (L12 / L10) is preferably 1. 05 or more, more preferably 1.1 or more, and preferably 2.0 or less, more preferably 1.75 or less, and preferably 1.05 or more and 2.0 or less, more preferably 1.1 or more. 1.75 or less.
From the same viewpoint as described above, when the length between the elastic member 52 disposed in the leg opening 1L and the waist opening end 50 is L14 (see FIG. 2), the ratio of L14 to L10 (L14 / L10 ) Is preferably 1.1 or more, more preferably 1.2 or more, and preferably 2.5 or less, more preferably 2.2 or less, and preferably 1.1 or more and 2.5 or less, More preferably, it is 1.2 or more and 2.2 or less.

  From the viewpoint of suppressing breakage of the sheet forming the outer surface of the diaper when pulling the disposal tape, the tensile strength Pc at which the fastening portion 18 starts to expand is based on the breaking strength Ph of the sheet forming the outer surface. Preferably it is low. From the viewpoint of more surely achieving the above effect, the ratio (Pc / Ph) of the tensile strength Pc at which the fastening portion 18 starts to stretch with respect to the breaking strength Ph of the sheet forming the outer surface of the diaper 1 is preferably 1. 2 or more, more preferably 1.5 or more, and preferably 3.0 or less, more preferably 2.5 or less, and preferably 1.2 or more and 3.0 or less, more preferably 1.5 or more. 2.5 or less.

The breaking strength Ph of the sheet forming the outer surface of the diaper 1 is measured by the following method.
A measurement piece cut out from the sheet forming the outer surface of the diaper 1 to the length of 150 mm in the vertical direction and the same length as the three-folded disposal tape in the horizontal direction is prepared. Next, the long side of the measurement piece is matched with the tensile direction, and the tensile strength is measured by the same method as described above [Method of measuring tensile strength for starting elongation]. The breaking strength of the sheet is the maximum value of the tensile strength that varies with the tensile distance.

  Assuming that the tensile strength Pc at which the fastening portion 18 starts to be extended is higher than the tensile strength Pb at which the intermediate portion 15 starts to extend, the intermediate portion 15 and the fastening portion 18 are capable of being extended. An appropriate material may be selected as the sheet pieces 16 and 19 constituting the portion 15 and the fastening portion 18 respectively. Specifically, for example, a stretchable film can be used as a constituent material of the sheet pieces 16 and 19. Such films include, for example, single layer films and multilayer films such as coextruded films. Further, as a material constituting the stretchable film, for example, polyolefin such as linear low density polyethylene is preferable. In addition, at least one material selected from the group consisting of polyvinyl chloride, ethylene-vinyl acetate copolymer and polyvinyl alcohol is also preferable. Furthermore, it is advantageous to use a material having a permanent deformation of at least 50%, more preferably at least 70%.

  As the sheet piece 13 constituting the fixing portion 12, the same material as that of the sheet piece described above may be used, and any material that cannot be stretched, that is, cannot be plastically deformed may be used. For example, conventionally known materials such as resinous sheets (plastic sheets, films, etc.), non-woven fabrics and woven fabrics can be used without particular limitation. In addition, even if the constituent material of the sheet | seat piece 13 for fixing | fixed part is extendable, in the part currently fixed to the outer surface of the diaper 1, the extensibility is a state which does not express.

  As the adhesive part 17 for intermediate | middle part which joins the intermediate part 15 and the fixing | fixed part 12 so that peeling is possible, and as the adhesive part 20 for fastening part which joins the fastening part 18 and intermediate part 15 so that peeling is possible, it is rubber type, for example A pressure-sensitive adhesive and an acrylic pressure-sensitive adhesive are generally used, and a rubber-based pressure-sensitive adhesive is preferably used. Examples of the rubber-based pressure-sensitive adhesive include synthetic rubbers such as styrene-butadiene block copolymers and hydrogenated styrene-butadiene block copolymers, or blends of these synthetic rubbers and resins. Moreover, you may use the adhesive which consists of a heat seal, a hot-melt-type adhesive, a melt blow-shaped or fibrous adhesive, or an adhesive agent.

  The intermediate portion adhesive portion 17 and the fastening portion adhesive portion 20 may each be formed on the entire second surface 16 b of the intermediate portion sheet piece 16. Moreover, these adhesion parts 17 and 20 may each be formed intermittently. In this case, these adhesive parts 17 and 20 can be formed intermittently by applying the above-mentioned adhesive intermittently.

  The disposal tape 10 provided on the outer surface of the diaper 1 includes a fixing portion sheet piece 13 at one end of the intermediate portion sheet piece 16 and a fastening portion sheet at the other end portion of the intermediate portion sheet piece 16. It can be manufactured by partially laminating the pieces 19 and joining and integrating the laminated portions using a known method such as an adhesive. In the laminated portion, a folded portion obtained by folding a part of the sheet piece may be formed as in the above embodiment.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, in the said embodiment, although the disposal tape 10 was provided in the back side part B of the diaper 1, the site | part which provides the disposal tape 10 is not restricted to this, For example, it is the stomach side part A and the crotch part C. Also good.
Moreover, in the said embodiment, although the disposal tape 10 was provided in the approximate center part in the horizontal direction Y of the diaper 1, the site | part which provides the disposal tape 10 is not restricted to this, For example, either the right or left of the diaper 1 It may be provided in the side area. Furthermore, in the said embodiment, although the disposal tape 10 was provided so that the longitudinal direction X1 might correspond with the longitudinal direction X of the diaper 1, the direction of the disposal tape 10 is not restricted to this, For example, a disposal tape 10 may be provided such that the longitudinal direction X1 thereof coincides with the lateral direction Y of the diaper 1.
Moreover, in the said embodiment, the knob piece 21 was joined to the other end of the sheet | seat piece 19 for fastening parts, However, The disposal tape 10 does not need to comprise the knob piece 21. FIG.

  The pants-type wearing article of the present invention may be a pants-type sanitary napkin or the like in addition to a pants-type disposable diaper for infants or adults.

This invention discloses the following underpants type disposable diaper regarding embodiment mentioned above further.
<1>
It has a waist opening and a pair of leg openings, and has a ventral side part disposed on the wearer's belly side in a worn state, a crotch part disposed on the crotch part, and a back side part disposed on the back side. A pants-type disposable diaper,
A disposal tape is provided on the outer surface of the disposable diaper,
The disposal tape has a fixing portion, an intermediate portion, and a fastening portion fixed to the outer surface of the disposable diaper, arranged in this order along the longitudinal direction of the disposal tape. It is in a tri-fold state that is laminated in order,
The waste tape in a tri-fold state is detachably joined between the fastening portion and the intermediate portion, and is also detachably joined between the intermediate portion and the fixed portion. And
The fastening portion and the intermediate portion are extendable in the longitudinal direction of the disposal tape in a deployed state where the tri-fold state is released,
The pants-type disposable diaper in which the tensile strength at which the fastening portion starts to stretch is higher than the tensile strength at which the intermediate portion starts to stretch.

<2>
No other member is interposed between the fixed part and the intermediate part, and the fixed part and the intermediate part are directly connected to each other,
No other member is interposed between the intermediate portion and the fastening portion, and the intermediate portion and the fastening portion are directly connected to each other. Diapers.
<3>
The pants type according to <1> or <2>, wherein the adhesive portion for intermediate portion is detachably joined between the intermediate portion and the fixing portion in the disposal tape that is in a three-fold state. Disposable diapers.
<4>
The pants-type disposable diaper according to <1> to <3>, wherein the tensile strength at which the fastening portion starts to expand is lower than the breaking strength of the intermediate portion.
<5>
The ratio (Pe / Pc) of the breaking strength Pe of the intermediate portion to the tensile strength Pc at which the fastening portion starts to elongate is preferably 2 or more, more preferably 3 or more, and preferably 6 or less, more preferably The pants-type disposable diaper according to any one of <1> to <4>, wherein is 5 or less.
<6>
The pants-type disposable diaper according to any one of <1> to <5>, wherein the fastening portion is configured to cause a visual change before and after extension.
<7>
The underpants-type disposable diaper according to any one of <1> to <6>, wherein the visual change is a color change, a deformation of a figure or a symbol, or a combination thereof.
<8>
Any of <1> to <7>, wherein the tensile strength Pb at which the intermediate portion starts to expand is 1.0 N or more, preferably 3.0 N or more, and is 6.5 N or less, preferably 5 N or less. A pants-type disposable diaper according to claim 1.
<9>
<1> to <8>, wherein the tensile strength Pc at which the fastening portion starts to expand is 10N or more, preferably 12N or more, and 19.5N or less, preferably 15N or less. The pants-type disposable diaper described in 1.
<10>
The tensile strength at which the intermediate portion starts to stretch is 6.5 N or less,
The pants-type disposable diaper according to any one of <1> to <9>, wherein a tensile strength at which the fastening portion starts to expand is 19.5 N or less.

<11>
The pants-type disposable according to any one of <1> to <10>, wherein the breaking strength Pf of the fastening portion is 20N or more, preferably 25N or more, and 50N or less, preferably 45N or less. Diapers.
<12>
The pants-type disposable diaper according to any one of <1> to <11>, wherein a tensile strength at which the fastening portion starts to expand is lower than a peel strength between the disposable diaper and the fixing portion.
<13>
The ratio (Pg / Pc) of the tensile strength Pc at which the fastening portion starts to extend to the peel strength Pg between the disposable diaper and the fixed portion is preferably 3 or more, more preferably 4 or more. The pants-type disposable diaper according to any one of <1> to <12>, preferably 8 or less, more preferably 7 or less.
<14>
Any one of the above <1> to <13>, wherein at least a part of the fixing portion is disposed in a high-rigidity region located inside a low-rigidity region located in a peripheral region of the disposable diaper. The pants-type disposable diaper according to Item.
<15>
The disposable diaper comprises an absorbent core,
The underpants-type disposable diaper according to any one of <14>, wherein the high-rigidity region is a region where the absorbent core is present in a thickness direction of the disposable diaper.
<16>
The pants-type disposable diaper according to <14> or <15>, wherein the fixed portion is entirely disposed in the high-rigidity region.
<17>
The tensile strength at which the fastening portion starts to stretch is higher than the tensile strength at the time of three-fold elongation in which the intermediate portion is stretched to three times the length before stretching, in the above <1> to <16> The pants-type disposable diaper according to any one of the above.
<18>
The ratio (Pc / P3b) of the tensile strength Pc at which the fastening portion starts to extend to the tensile strength P3b when the intermediate portion is stretched three times is 1.5 or more, preferably 2.0 or more. The pants-type disposable diaper according to any one of <1> to <17>, which is 0.5 or less, preferably 3.0 or less.
<19>
The disposable diaper expands and contracts in the vertical direction when the direction extending from the abdominal side part to the back side part through the crotch part is the vertical direction and the direction orthogonal to the vertical direction is the horizontal direction. Have
The disposal tape is provided on the back side portion, and an end portion on the crotch portion side of the fixing portion is positioned on an opening end side of the waist opening portion with respect to the stretchable portion in the longitudinal direction. The pants-type disposable diaper according to any one of <1> to <18>.
<20>
It has a surface sheet on the skin facing surface side and a back sheet on the non-skin facing surface side, and includes an absorbent main body having an absorbent body between both sheets, and both side portions of the absorbent main body along the longitudinal direction. And a leak-proof cuff extending along the longitudinal direction X,
The leak-proof cuff is configured to include a cuff forming sheet and one or a plurality of cuff elastic members fixed in an elongated state in the longitudinal direction.
The crotch side end of the fixing portion is the back side portion of the elastic member arranged along the back side end portion of the cuff elastic member and the leg opening portion in the back side portion. The underpants type disposable diaper as described in said <19> distribute | arranged to the opening end side of the said waist opening part rather than the edge part of the side.

<21>
The length between the crotch side end of the fixing portion and the waist opening end of the back side is L10, and the length between the cuff elastic member and the waist opening end is L12. The ratio of L12 to L10 (L12 / L10) is 1.05 or more, preferably 1.1 or more, and 2.0 or less, preferably 1.75 or less, according to the above <20>. Pants-type disposable diaper.
<22>
When the length between the elastic member arranged in the leg opening and the waist opening end is L14, the ratio of L14 to L10 (L14 / L10) is 1.1 or more, preferably 1.2 or more. The pants-type disposable diaper according to any one of <20> or <21>, which is 2.5 or less, preferably 2.2 or less.
<23>
The pants-type disposable diaper according to any one of <1> to <22>, wherein a tensile strength at which the fastening portion starts to expand is lower than a breaking strength of a sheet forming the outer surface.
<24>
The ratio (Pc / Ph) of the tensile strength Pc at which the fastening portion starts to extend to the breaking strength Ph of the sheet forming the outer surface of the disposable diaper is 1.2 or more, preferably 1.5 or more. The underpants-type disposable diaper according to any one of <1> to <23>, which is 3.0 or less, preferably 2.5 or less.

DESCRIPTION OF SYMBOLS 1 Pants type disposable diaper 1L Leg opening 1W Waist opening 2 Top sheet 3 Back sheet 4 Absorbent main body 10 Disposable tape 12 Fixing part 13 Fixing part sheet piece 14 Fixing part adhesive part 15 Intermediate part 16 Intermediate part sheet Piece 17 Adhesive portion 18 for intermediate portion Fastening portion 19 Sheet piece 20 for fastening portion Adhesive portion 21 for fastening portion Picking piece A Abdominal side B Back side C Crotch

Claims (10)

It has a waist opening and a pair of leg openings, and has a ventral side part disposed on the wearer's belly side in a worn state, a crotch part disposed on the crotch part, and a back side part disposed on the back side. A pants-type disposable diaper,
A disposal tape is provided on the outer surface of the disposable diaper,
The disposal tape has a fixing portion, an intermediate portion, and a fastening portion fixed to the outer surface of the disposable diaper, arranged in this order along the longitudinal direction of the disposal tape. It is in a tri-fold state that is laminated in order,
The waste tape in a tri-fold state is detachably joined between the fastening portion and the intermediate portion, and is also detachably joined between the intermediate portion and the fixed portion. And
The fastening portion and the intermediate portion are extendable in the longitudinal direction of the disposal tape in a deployed state where the tri-fold state is released,
The pants-type disposable diaper in which the tensile strength at which the fastening portion starts to stretch is higher than the tensile strength at which the intermediate portion starts to stretch.   The pants-type disposable diaper according to claim 1, wherein a tensile strength at which the fastening portion starts to expand is lower than a breaking strength of the intermediate portion.   The pants-type disposable diaper according to claim 1, wherein the fastening portion is configured to cause a visual change before and after extension.   The pants-type disposable diaper according to claim 3, wherein the visual change is a color change, a deformation of a figure or a symbol, or a combination thereof. The tensile strength at which the intermediate portion starts to stretch is 6.5 N or less,
The pants-type disposable diaper according to any one of claims 1 to 4, wherein a tensile strength at which the fastening portion starts to expand is 19.5 N or less.   The pants-type disposable diaper according to any one of claims 1 to 5, wherein a tensile strength at which the fastening portion starts to expand is lower than a peel strength between the disposable diaper and the fixing portion.   The said fixing | fixed part at least one part is distribute | arranged to the high-rigidity area | region located inside the low-rigidity area | region located in the peripheral area of the said disposable diaper. Pants-type disposable diapers.   The tensile strength at which the fastening portion starts to stretch is higher than the tensile strength at the time of three-fold elongation in which the intermediate portion is stretched to three times the length before stretching. The pants-type disposable diaper according to Item. The disposable diaper expands and contracts in the vertical direction when the direction extending from the abdominal side part to the back side part through the crotch part is the vertical direction and the direction orthogonal to the vertical direction is the horizontal direction. Have
The disposal tape is provided on the back side portion, and an end portion on the crotch portion side of the fixing portion is positioned on an opening end side of the waist opening portion with respect to the stretchable portion in the longitudinal direction. The underpants-type disposable diaper according to any one of claims 1 to 8.   The pants-type disposable diaper according to any one of claims 1 to 9, wherein a tensile strength at which the fastening portion starts to extend is lower than a breaking strength of a sheet forming the outer surface.

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