JP2012239555A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable diaper preventing deterioration in a wearing property and a body retaining property thereof and, even when a wearer takes a droopy posture, eliminating a shortage in the length of a back body section and excess in the length of a front body section.SOLUTION: The back body section 12 of the disposable diaper is formed with one or a plurality of tucks 30 and, even when the wearer takes the droopy posture, the tucks 30 are developed according to the extension of the back part of the wearer to prevent the back body section 12 from slipping off in the direction of the crotch.

Description

  The present invention relates to a disposable diaper that is attached to a wearer's crotch and absorbs and holds a liquid such as urine.

  Conventionally, disposable diapers are known for absorbing and holding liquids such as urine excreted by a wearer (for example, Patent Documents 1 and 2). The disposable diaper is divided into a front body contacting the abdomen of the wearer, a back body contacting the back of the wearer, and a crotch region contacting the crotch of the wearer.

  For example, in the case of a pants-type disposable diaper, an opening is formed around the waist and each leg by joining the front and back bodies at both sides. The pants-type disposable diaper is attached to the wearer by putting both legs through the opening around the waist and taking out both legs from the opening around each leg. For example, in the case of a tape-type disposable diaper, fastening tapes are provided at both ends of the back body. Then, the tape-type disposable diaper is attached to the wearer by turning the fastening tape attached to the back body from the back side of the wearer to the abdomen side and attaching it to the front body.

JP 2011-15821 A JP 2003-88547 A

Next, a conventional disposable diaper 200 will be described with reference to FIG. 7, taking a pants-type disposable diaper as an example.
In the conventional disposable diaper 200, the length from the center of the crotch region 213 to the end part on the front body 211 side and the end part on the rear body 212 side are substantially the same length. For this reason, when the both sides of the front body 211 and the back body 212 are joined, the length of the front body 211 and the length of the back body 212 are aligned when worn, as shown in FIG. It will be different. Thus, by aligning the length of the front body 211 and the length of the back body 212, the wearer can easily put both legs into the opening around the waist, and the appearance can be improved. is there.

  However, when the lengths of the front body 211 and the back body 212 are aligned when worn, the wearer of the disposable diaper 200 assumes a forward leaning posture (for example, when the waist is bent, it sits on a chair). 7), for example, as shown in FIG. 7 (b), the wearer's back and buttocks protrude from the back body 212 of the disposable diaper 200, or the front part of the wearer's abdomen. At that time, there was a problem that 211 was sticking. That is, when the wearer bends the waist with the conventional disposable diaper 200 attached, the back of the wearer extends and the abdomen contracts. At this time, since the lengths of the back body 212 and the front body 211 are constant, the back body 212 is insufficient as much as the back portion is extended, and the front body 211 is left as much as the abdomen is contracted. In particular, when the wearer leans forward, the back body 212 shifts toward the wearer's inseam and sags near the inseam. Then, the elastic back and forth member 212 is pulled in the direction of the front body 211 by the elastic elastic member 241 provided on the front body 211 of the disposable diaper 200, and the lack of the length of the back body 212 and the extra length of the front body 211 are remarkable. become. Therefore, in the conventional disposable diaper 200, the back of the wearer protrudes from the back body 212 or a gap is formed between the back and the back, while the front body 211 is doubled and the balance is poor. As described above, in the conventional disposable diaper 200, the height of the back body 212 is insufficient, and thus liquid such as urine may leak out from a portion where the gap is open, and the leakage prevention performance is lowered. Furthermore, in the conventional disposable diaper 200, since the front body 211 is doubled in a wearer's abdomen, not only a feeling of wear worsens, but there exists a possibility that breathability may fall and a wearer's abdomen may get muddy.

  Also, in the case of a person who maintains a sitting position for a long time, such as a person who uses a wheelchair, the waist gradually falls from the chair as the sitting position becomes longer. You may lift your hips while holding both sides. However, when the conventional disposable diaper 200 is worn, when the waist is lifted, the disposable diaper 200 does not lift up due to friction with the chair, but only the wearer's waist rises, and the wearer's back is the disposable diaper. There was also a situation where it protruded from 200.

  In order to eliminate such a situation, it is conceivable to manufacture a disposable diaper in which the length of the back body is previously formed long and the length of the front body is adjusted short. However, if the lengths of the back body and the front body are different in the normal state, it becomes difficult to wear the disposable diaper, it is easy to slip off the body, and the wearer's feeling of wear is reduced.

  For this reason, at present, even if the wearer is leaning forward without lowering the wearability and body holding ability of the disposable diaper in a normal state, the length of the back body is insufficient or the front body There is a need for disposable diapers that do not have any length.

Accordingly, the inventors of the present invention have intensively studied the means for solving the problems of conventional disposable diapers. As a result, one or a plurality of tacks are formed on the back of the disposable diaper, and the wearer is inclined forward. If the back of the back of the wearer is unfolded in the case, the back of the back can be prevented from shifting in the inseam direction, eliminating the situation where the back of the back is insufficient or the front of the back The knowledge that it is possible was obtained. The inventor has conceived that the problems of the prior art can be solved based on the above knowledge, and has completed the present invention.
Specifically, the present invention has the following configuration.

The present invention relates to a disposable diaper worn by a wearer.
The disposable diaper includes a front body 11 located on the wearer's abdomen, a back body 12 located on the back of the wearer, and a crotch region 13 located between the front body 11 and the back body 12.
The back body 12 is formed by being folded at a mountain fold line 31 that extends in the short direction of the disposable diaper and folds toward the skin non-contact surface side of the disposable diaper and a valley fold line 32 that folds in the opposite direction to the mountain fold line 31. One or a plurality of tacks 30 are provided.

  Thus, the back body 12 of the disposable diaper is provided with at least one or more tacks 30 formed by being folded at two folding lines (mountain folding line 31 and valley folding line 32) extending in the short direction of the disposable diaper. It has been. For this reason, even if it is a case where a wearer's attitude | position becomes a forward inclination, the tack | tuck 30 expand | deploys corresponding to elongation of a wearer's back part. As a result, the back body 12 can be prevented from slipping toward the wearer's inseam and sagging in the vicinity of the inseam. Therefore, the length of the back body 12 is not short, so that the back of the wearer does not protrude or a gap is not formed between the disposable diaper and the back of the wearer. Further, even when the front body 11 is provided with the elastic material 41 around the abdomen in order to enhance the fit to the wearer's body, the rear body 12 when the wearer's posture is tilted forward. By preventing the slippage, the back body 12 is not pulled by the elastic material 41 around the abdomen, so that it is possible to prevent the front body 11 from being doubled in the wearer's abdomen.

  In the present invention, the valley fold line 32 may be formed at a position closer to the upper end in the longitudinal direction of the back body 12 as compared with the mountain fold line 31 in a state where the tack 30 is opened. Thereby, the top of the tack 30 corresponding to the fold of the mountain fold line 31 faces upward.

  In this way, the tack 30 formed on the back body 12 is folded upward so as to stand up with the valley fold line 32 as a starting point, so that, for example, a covering worn from a leg portion such as pants can be used as a disposable diaper. It is easy to wear even if it is still worn. Moreover, it can also prevent that the tack | tuck 30 which became upward becomes resistance, and the coating | wearing which it wore down falls.

  According to the present invention, the mountain fold line 31 may be formed at a position closer to the upper end in the longitudinal direction of the back body 12 as compared with the valley fold line 32 in a state where the tack 30 is opened. As a result, the top of the tack 30 corresponding to the fold of the mountain fold line 31 faces downward.

  Thus, since the tack 30 formed on the back body 12 is folded downward, it is easy to wear the covering worn from the head, for example, a dress, even when the disposable diaper is still worn. Become. Moreover, it can also prevent that the tack | tuck 30 which became downward becomes resistance, and the coating | wearing to which it wore up is prevented.

  In the present invention, it is preferable that a plurality of tacks 30 are formed on the back body 12 of the disposable diaper by alternately repeating the mountain fold lines 31 and the valley fold lines 32. The number of tacks 30 formed on the back body 12 may be two to six, three to five, or four, for example. In the present invention, the conventional problem can be sufficiently solved even when the number of tacks 30 is one.

  In the present invention, the elastic elastic member 40 is preferably disposed along one or both of the mountain fold line 31 and the valley fold line 32.

  Thus, by arranging the elastic elastic member 40 along the mountain fold line 31 and the valley fold line 32, the back body 12 of the disposable diaper can be fitted to the wearer's back. Further, since the fold line of the mountain fold line 31 and the fold line of the valley fold line 32 can be brought into close contact with the wearer's back, the tack 30 can be easily deployed in accordance with the elongation of the back when the wearer leans forward. . For this reason, it can prevent more effectively that a wearer's back part protrudes from the back body 12 of a disposable diaper, or a clearance gap arises between the back body 12 of a disposable diaper and a wearer's back part.

In one embodiment, the present invention relates to a disposable diaper having an outer cover 10 and an inner pad 20.
The outer cover 10 includes a front body 11 located on the wearer's abdomen, a back body 12 located on the back of the wearer, and a crotch region located between the front body 11 and the back body 12 and located on the inseam of the wearer. It is divided into 13.
Further, the inner pad 20 is covered with the outer cover 10, extends in the longitudinal direction of the outer cover 10, and exists in a region including the crotch region 13 of the outer cover 10.
The rear body 12 of the outer cover 10 extends in the lateral direction of the outer cover 10 and is a mountain fold line 31 that folds to the skin non-contact surface side of the outer cover 10 and a valley that folds to the opposite side of the mountain fold line 31. One or a plurality of tacks 30 formed by being folded by the folding line 32 are provided.

  In an embodiment of the present invention, when the outer cover 10 has a tack forming region 14 in which the tack 30 is formed in the back body 12, a part of the inner pad 20 is tack-formed. The inner pad 20 disposed in the region 14 may be fixed to the outer cover 10 except for a portion disposed in the tack forming region 14.

  When a plurality of tacks 30 are formed on the back body 12, the tack forming region 14 extends in the longitudinal direction of the outer cover 10. Even in this case, it is preferable to dispose the inner pad 20 across the tack forming region 14 in order to maintain the leakproofness (water absorption) of the disposable diaper. However, when the inner pad 20 disposed in the tack forming region 14 is fixed to the outer cover 10, the development of the tack 30 is hindered. Therefore, the inner pad 20 is fixed to the outer cover 10 except for a part disposed in the tack forming region 14. Thereby, since the length of the inner pad 20 in the longitudinal direction can be secured while keeping the tack forming region 14 in a wide area, the leakproofness (water absorption) of the disposable diaper can be efficiently maintained.

  In the present invention, both sides of the back body 12 may be joined to both sides of the front body 11. In other words, by joining the side end portions of the side flaps 15 extending from both side end portions of the front body 11 and the side end portions of the side flaps 15 extending from both side end portions of the rear body 12, a pants-type disposable It is good also as forming a diaper.

FIG. 1 is an example of a development view of a disposable diaper, and shows a state in which the disposable diaper is viewed from the skin contact surface side. FIG. 2 is a perspective view showing an unfolded state of the disposable diaper having three tacks, and shows a state in which the disposable diaper is viewed from the skin non-contact surface side. FIG. 3 shows an example of a state where the tack is opened, and shows a state where the disposable diaper is viewed from the skin contact surface side. FIG. 4 is a schematic diagram showing another example of the structure of the tack, in which only the structure of the tack is extracted and drawn. FIG. 4A shows an example in which three downward tacks are formed. FIG. 4B shows an example in which a downward tack is formed following an upward tack. FIG. 4C shows an example in which an upward tack is formed following a downward tack. FIG. 5 shows an example of a pants-type disposable diaper in which the front body and the back body are joined at the joint portion, and shows a state in which the wearer wears the diaper. FIG. 6 is an example of a development view of a disposable diaper, and shows a state where the disposable diaper is viewed from the skin contact surface side. In FIG. 6, the fixing area of the outer cover and the inner pad is shown with light ink. FIG. 7 is a diagram illustrating an example of a conventional disposable diaper. FIG. 7A shows a conventional pants-type disposable diaper. FIG.7 (b) has shown the example of the state with which the conventional disposable diaper was mounted | worn with the wearer.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, but includes those appropriately modified by those skilled in the art from the following embodiments.

(1. Overall configuration of disposable diapers)
The present invention can be applied to disposable diapers. When worn, the disposable diaper is divided into a front body 11 located on the wearer's abdomen, a back body 12 located on the back of the wearer, and a crotch region 13 located between the front body 11 and the back body 12. The

  FIG. 1 is an example of a development view of a pants-type disposable diaper 100. In the example shown in FIG. 1, the disposable diaper 100 has an inner pad 20 that absorbs and holds the excrement of the wearer and an outer cover 10 that holds the inner pad 20 on the wearer's body. The inner pad 20 is covered with the outer cover 10, and is disposed around the crotch region 13 from the front body 11 to the rear body 12 along the longitudinal direction of the outer cover 10. The inner pad 20 includes a liquid-permeable top sheet 21 on the skin contact surface side that contacts the skin of the wearer, and a liquid-impermeable back sheet on the skin non-contact surface side that does not contact the wearer's skin. 22. In the inner pad 20, an absorber 23 is disposed between the top sheet 21 and the back sheet 22. The absorber 23 absorbs and holds the liquid that has passed through the top sheet 21. The back sheet 22 of the inner pad 20 covers the absorbent body 23 from the non-skin contact surface side so that the liquid held by the absorbent body 23 does not leak out.

  FIG. 1 shows a state in which the disposable diaper 100 is viewed from the skin contact surface side. As shown in FIG. 1, in a pants-type disposable diaper 100, an outer cover 10 includes a front body 11 located on the wearer's abdomen when worn, a back body 12 located on the wearer's back when worn, In some cases, it includes a crotch region 13 located in the crotch of the wearer. The crotch region 13 is located between the front body 11 and the back body 12 when viewed in the longitudinal direction of the outer cover 10. Side flaps 15 extend from both side edges of the front body 11 and the back body 12. Further, a joint portion 16 is provided at each side end of the side flap 15 formed on the front body 11 and the side flap 15 formed on the rear body 12. In the joining part 16, the side edge part of each side flap 15 is joined correspondingly, for example by joining means like a heat seal. When the side flaps 15 are joined to each other at the joint 16, a waist opening that is located around the wearer's waist when worn and a leg opening that is located around each leg of the wearer are formed. The For example, in the case of a pants-type disposable diaper 100, the wearer puts both legs into the waist opening so that the front body 11 is located on the abdomen and the back body 12 is located on the back, and each leg is placed on the leg. The disposable diaper 100 can be mounted by taking it out from the surrounding opening.

  The disposable diaper 100 may be provided with a three-dimensional gather 24 along the longitudinal direction of the inner pad 20. The sheet material forming the three-dimensional gathers 24 is formed of a hydrophobic material, one end of the sheet material is fixed on the surface of the top sheet 21, and the other end is provided with an elastic stretch member. And if the elastic expansion-contraction member arrange | positioned in the sheet | seat material for three-dimensional gathers 24 shrinks, the three-dimensional gather 24 will stand up using the contraction force of an elastic expansion-contraction member. The three-dimensional gather 24 becomes a leak-proof wall that prevents liquid from leaking from the side of the top sheet 21 by standing.

  The present invention can also be applied to a tape-type disposable diaper. In a tape-type disposable diaper, fastening tapes are attached to side flaps extending from both side edges of the back body so as to protrude from the side edges. A tape-type disposable diaper is applied to the wearer by attaching a fastening tape attached to the back body with the front body applied to the wearer's abdomen and the back body to the back of the wearer. Installed.

(2. Specific configuration of disposable diapers)
Hereinafter, an embodiment of the disposable diaper according to the present invention will be specifically described by taking a pants-type disposable diaper as an example. However, the present invention is not limited to a pants-type diaper, and can be applied to a tape-type diaper as described above, for example.

(2-1. Outer cover)
The outer cover 10 is a member for holding the inner pad 20 in the crotch of the wearer and encapsulating the wearer's body. The outer cover 10 is divided into a front body 11, a back body 12, and a crotch region 13.

  Here, the back body 12 of the outer cover 10 is folded by two fold lines (mountain fold line 31 and valley fold line 32) extending in the short direction of the outer cover 10 to form a tack 30. The mountain fold line 31 is a line that folds toward the non-skin contact surface side of the outer cover 10, and the valley fold line 32 is a line that folds in the opposite direction to the mountain fold line 31. The number of tacks 30 formed on the back body 12 may be one or plural. The developed view of the disposable diaper 100 shown in FIG. 1 shows an example in which three tacks 30 are formed on the back body 12. In the present specification, a region where a plurality of outer covers 10 are overlapped by forming the tack 30 in the back body 12 is referred to as a tack forming region 14.

  FIG. 2 is a perspective view showing a developed state of the disposable diaper 100 in which three tacks 30 are formed, and shows a state in which the disposable diaper 100 is viewed from the skin non-contact surface side. In the example shown in FIG. 2, in order to show the structure of the tack 30 in an easy-to-understand manner, the drawing is performed with a gap provided between the successive tacks 30. It is preferable to join without a gap in the tack holding part 33 provided on both side edges (both side edges of the side flap 15). As shown in FIG. 2, each tack 30 includes a mountain fold line 31 that folds when viewed from the skin non-contact surface side of the outer cover 10 and a valley fold line 32 that folds when viewed from the skin non-contact surface side. The outer cover 10 is formed by being folded.

  Further, a tack holding portion 33 for holding the folded state is formed at both side edges of each tack 30. That is, the tack holding portion 33 is formed in the vicinity of both side edges of the tack 30 in the portion where the outer cover 10 is folded in triplicate by forming the tack 30. The tack holding portion 33 is a portion shown with light ink in FIG. For example, hot melt, heat seal, ultrasonic seal, or other adhesive or adhesive is applied to the tack holding portion 33. For this reason, the tack 30 cannot be expanded in the holding portion. In the case of a pants-type diaper, the joints 16 provided on both edges of the side flap 15 of the front body 11 and the joints 16 provided on both edges of the side flap 15 of the back body 12 are bonded. By doing so, the folded state of the tack 30 may be maintained. Moreover, in the case of a tape-type disposable diaper, it is preferable to arrange a tack holding portion for holding the folded state of the tack on both side flaps on the back body. In the tack holding portion, the back body of the tape-type disposable diaper is joined by a heat seal such as heat seal or an adhesive such as hot melt, and the tack is held in a folded state.

  In the example shown in FIG. 2, all three continuous tacks 30 are formed upward. Here, “upwardly” means that the crease of the mountain fold line 31 of the tack 30 faces the wearer's head when the disposable diaper is worn. In order to form a certain tack 30 upward, the valley fold line 32 of the mountain fold line 31 and the valley fold line 32 constituting the tack 30 is formed closer to the upper end of the back body 12 when the tack 30 is opened. do it. That is, as in the example shown in FIG. 2, when all the continuous tacks 30 are facing upward, the mountain fold line 31 and the valley fold line 32 extend from the upper end of the back body 12 to the valley fold line 32 and the mountain fold line 31. They are formed alternately.

  FIG. 3 shows an example of a state where the tack 30 formed on the back body 12 is opened, and shows a state where the disposable diaper 100 is viewed from the skin contact surface side. In particular, FIG. 3 shows a state where the tack 30 of the disposable diaper 100 shown in FIG. 2 is opened. As shown in FIG. 3, in the state where the tack 30 is opened, the valley fold lines 32 and the mountain fold lines 31 are alternately continued. Since the valley fold line 32 is formed closer to the upper end of the back body 12 than the mountain fold line 31, when the outer cover 10 is folded along the valley fold line 32 and the mountain fold line 31, an upward tack 30 is formed.

  Further, the length L1 between the mountain fold line 31 and the valley fold line 32 forming a certain tack 30 may be, for example, 10 mm to 100, 15 mm to 80 mm, 20 mm to 60 mm, or 25 mm to 40 mm, and particularly 15 mm to 25 mm. It is preferable that The size of the folding of the tack 30 depends on the length L1. In the case where a plurality of tacks 30 are formed, the lengths L1 of the respective tacks 30 are preferably substantially the same, but the lengths L1 may be changed in the respective tacks 30. For example, the length L1 of the tack 30 formed at a position near the upper end of the back body 12 is formed to be relatively short, and the length L1 of the tack 30 formed at a position far from the upper end of the back body 12 is formed to be relatively long. You can also In this way, by setting the length L1 of each tack 30 to a different length, for example, when the wearer leans forward, the tack 30 is first developed from the smaller tack 30 and then gradually larger tack. Since 30 is developed, the development width of the tack 30 can be finely adjusted as appropriate according to the movement of the wearer.

  Further, in the case where a plurality of tacks 30 are formed, the length L2 between the folding lines (mountain folding lines 31 or valley folding lines 32) of adjacent tacks 30, that is, in the example shown in FIG. The length L2 between 31 and the valley fold line 32 of the tack 30 adjacent to a certain tack 30 may be 20 mm to 200 mm, 30 mm to 160 mm, 40 mm to 120 mm, or 50 mm to 40 mm, particularly 30 mm to 50 mm. It is preferable. When a plurality of tacks 30 are formed, the distance between the tacks 30 depends on the length L2. Further, the length between the mountain fold line 31 and the valley fold line 32 forming a certain tack 30 is L1A, and the length between the mountain fold line 31 and the valley fold line 32 forming the adjacent tack 30 is L1B. In this case, the length L2 is preferably a length satisfying [Expression: L2 = L1A + L1B]. If the length L2 satisfies the above equation, the plurality of tacks 30 formed on the back body 12 do not overlap or dissociate, and thus the plurality of tacks 30 can be efficiently formed on the back body 12. That is, when all the lengths L1 are equal, the length L2 is preferably twice as long as the length L1.

  Further, in the vicinity of the upper end portion of the back body 12, a region where the outer cover 10 does not overlap even when the outer cover 10 is folded by two fold lines and one or more tacks 30 are formed (upper region 17). Is preferably provided. That is, the tack 30 is not formed in the upper end region 17 of the back body 12. In the upper end region 17 of the rear body 12, an elastic elastic member (back elastic material 42) is preferably disposed along the short direction of the outer cover 10. As described above, the elastic elastic member (back elastic material 42) is disposed in the upper end region 17, thereby increasing the adhesion between the back of the wearer and the upper end of the back body 12. Therefore, even when the wearer leans forward and the back portion extends, the upper end of the back body 12 moves above the wearer's back portion following the extension of the back portion. As described above, the entire back body 12 is pulled upward in accordance with the extension of the wearer's back, so that the tack 30 formed on the back body 12 can be easily deployed. In addition, when the wearer is an elderly person or the like and the back (waist) is bent, the wear width of the tack 30 is adjusted according to the way the wearer bends and the body shape, It can be fitted without gaps according to the wearer's condition and body shape.

  In FIG. 3, the tack holding portion 33 is formed between two fold lines (mountain fold line 31 and valley fold line 32) that form a certain tack 30 at positions corresponding to both side edges of the tack 30. An example is shown. In FIG. 3, the tack holding part 33 is shown with light ink. For example, hot melt, heat seal, ultrasonic seal, and other adhesives or adhesives are applied to the tack holding unit 33. In the example shown in FIG. 3, it is preferable that an adhesive or the like is applied to both surfaces (skin contact surface side and skin non-contact surface side) between two fold lines forming a certain tack. By forming the tack holding portion 33 between the two folding lines forming a certain tack as described above, the outer cover 10 is folded by the adhesive applied to the tack holding portion 33 when the outer cover 10 is folded at the two folding lines. Since the overlapping portions of the cover 10 are joined, the folded state of the tack 30 is maintained. In addition, the location which forms the tack holding | maintenance part 33 is not restricted to the location shown by FIG. For example, an adhesive or the like may be applied to a position that is bonded to a region between two fold lines forming a certain tack 30 when folded at two fold lines.

  FIG. 4 is a schematic view showing another configuration example of the tack 30 formed on the back body 12 of the outer cover 10, and only the configuration of the tack 30 is extracted and shown. FIG. 4A shows an example in which three downward tacks 30 are formed. FIG. 4B shows an example in which a downward tack 30 is formed following the upward tack 30. FIG. 4C shows an example in which an upward tack 30 is formed following the downward tack 30. Also in FIG. 4, in order to show the structure of the tack 30 in an easy-to-understand manner, the drawing is performed in a state where a gap is provided between successive tacks 30.

  As shown in FIG. 4A, the tack 30 may be formed downward. Here, “downward” means that the crease of the mountain fold line 31 of the tack 30 faces the wearer's leg when the disposable diaper is worn. In order to form the tack 30 downward, the mountain fold line 31 of the mountain fold line 31 and the valley fold line 32 constituting the tack 30 is formed closer to the upper end of the back body 12 when the tack 30 is opened. That's fine. In the example shown in FIG. 4A, an example in which three downward tacks 30 are continuously formed is shown, but the number of tacks 30 may be one or two. Or four or more.

  Further, as shown in FIG. 4B, the downward tack 30 may be formed continuously with the upward tack 30. That is, in the example shown in FIG. 4B, in the state where the tack 30 is opened, the valley fold line 32, the mountain fold line 31, the mountain fold line 31, and the valley fold line 32 are formed in this order from the upper end of the back body 12. Yes. Further, as shown in FIG. 4C, the upward tack 30 may be formed continuously with the downward tack 30. That is, in the example shown in FIG. 4C, the mountain fold line 31, the valley fold line 32, the valley fold line 32, and the mountain fold line 31 are formed in this order from the upper end of the back body 12 in the state where the tack 30 is opened. Yes.

  Furthermore, in the present invention, it is preferable to dispose the elastic elastic member 40 along either the mountain fold line 31 or the valley fold line 32 forming the tack 30 or both the mountain fold line 31 and the valley fold line 32. For example, in the example shown in FIGS. 4A to 4C, the elastic elastic member 40 is disposed along the valley fold line 32 that forms each tack 30. In addition, although illustration is abbreviate | omitted, it is good also as arrange | positioning the elastic elastic member 40 along the mountain fold line 31. FIG. Usually, a thread-like elastic rubber is applied to the elastic elastic member 40. As such a rubber material, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, or polyester can be used.

  FIG. 5 shows an example of a pants-type disposable diaper 100 in which the front body 11 and the back body 12 are joined at the joint 16, and shows a state worn by the wearer. As shown in FIG. 5, in the disposable diaper 100 according to the present invention, since the tack 30 is formed on the back body 12, when the wearer leans forward, the wearer's back stretches. Together, the tack 30 is developed. Therefore, it is possible to prevent the back length of the back body 12 from being short and the wearer's back from protruding or a gap from being formed between the disposable diaper 100 and the wearer's back. Further, since the back body 12 can be prevented from slipping when the wearer's posture is inclined forward, the front body 11 is provided with a stretchable member 41 around the abdomen for enhancing the fit to the wearer's body. Even in this case, the back body 12 is not pulled by the abdomen elastic member 41, and a situation in which the front body 11 is doubled in the wearer's abdomen can be prevented. Furthermore, since the unfolding width of the tack 30 can be adjusted in advance according to the wearer's back and waist bends and the wearer's body shape, it can be worn according to the wearer's condition and body shape. Disposable diapers that fit the body without gaps can be provided.

  Next, a location where the inner pad 20 is fixed to the outer cover 10 will be described with reference to FIGS. 1 and 6. For example, in the example shown in FIG. 1, only three tacks 30 are formed on the back body 12 of the outer cover 10, and the region where the outer cover 10 is folded (tack forming region 14) is relatively narrow. Yes. For this reason, in FIG. 1, the inner pad 20 does not overlap the tack formation region 14. Therefore, in such a case, the back sheet 22 of the inner pad 20 may be fixed to the outer cover 10 by applying an adhesive to the entire surface in contact with the outer cover 10.

  On the other hand, in the example shown in FIG. 6, since four tacks 30 are formed on the back body 12 of the outer cover 10, the tack forming region 14 is formed relatively wide in the longitudinal direction of the outer cover 10. Yes. For this reason, when trying to fix the inner pad 20 to the outer cover 10, a part near the upper end of the rear body 12 of the inner pad 20 overlaps with the tack forming region 14. Therefore, in such a case, it is preferable to apply an adhesive to the back sheet 22 of the inner pad 20 and fix it to the outer cover 10 except for the portion of the inner pad 20 that overlaps the tack forming region 14. In FIG. 6, the fixing region 18 where the outer cover 10 and the inner pad 20 are fixed is shown with light ink.

  Examples of the material constituting the outer cover 10 are a nonwoven fabric or a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester.

  The outer cover 10 may be provided with an elastic material 41 around the abdomen, an elastic material 42 around the back, and an elastic material 43 around the legs. In addition, the outer cover 10 is preferably configured by bonding a plurality of sheet materials in order to fix the various elastic materials 41, 42 and 43 in a sandwiched state.

  For example, as shown in FIG. 1, it is preferable that a plurality of elastic members 41 around the abdomen are arranged in the front body 11 and the abdomen elastic members 41 contract to form a gather around the abdomen. . Further, a plurality of elastic members 42 around the back portion are disposed in the vicinity of the upper end portion (upper end region 17) of the back body 12 along the short direction of the outer cover 10, and the elastic members 42 around the back portion contract. Therefore, it is preferable that a gather around the back is formed. Since gathers are formed around the abdomen and the back as described above, the front body 11 and the back body 12 of the outer cover 10 can be brought into close contact with the wearer, and therefore it is more effective that the disposable diaper 100 is lowered. Can prevent

  Furthermore, it is preferable that a leg-around elastic member 43 is disposed along the leg portion of the outer cover 10 and the leg-around elastic member 43 contracts to form a leg-around gather. Since the outer cover 10 is in close contact with the wearer's leg by forming gathers around the leg, urine leakage from around the leg can be prevented.

  In addition, a known diaper configuration can be appropriately employed for the outer cover 10. In addition, the various elastic materials 41, 42, and 43 can also be appropriately changed in the constituent material, the elongation ratio of the material, and other configurations according to the size and structure of the diaper.

(2-2. Inner pad)
As described above, the disposable diaper 100 is provided with the inner pad 20 that absorbs the excrement of the wearer along the longitudinal direction of the outer cover 10. The inner pad 20 basically includes a top sheet 21, a back sheet 22, an absorber 23, and a three-dimensional gather 24. Here, FIG. 1 shows a plan view of the inner pad 20 disposed on the outer cover 10 as viewed from the top sheet 21 side.

(2-2-1. Top sheet)
The top sheet 21 is a member that is in direct contact with the skin of the wearer's crotch and allows liquid such as urine to pass through the absorber 23. For this reason, it is preferable that the top sheet 21 is made of a liquid-permeable material having high flexibility. The top sheet 21 is disposed so as to cover the surface of the absorber 23.

Examples of the liquid permeable material constituting the top sheet 21 are a woven fabric, a non-woven fabric, or a porous film. Further, for example, a fiber made of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon, which has been subjected to a hydrophilization treatment and further made into a nonwoven fabric may be used.
(2-2-2. Backsheet)

  The back sheet 22 is a member for preventing the liquid that has passed through the top sheet 21 and absorbed by the absorber 23 from leaking. For this reason, the backsheet 22 is made of a liquid-impermeable material. The back sheet 22 is disposed so as to cover the bottom surface of the absorber 23 in order to prevent liquid leakage from the bottom surface of the absorber 23.

  An example of the impermeable material constituting the back sheet 22 is a liquid impermeable film made of polyethylene resin. In particular, it is preferable to use a microporous polyethylene film in which a plurality of fine pores of 0.1 to 4 μm are formed from the viewpoint of imparting air permeability.

  A cover sheet 25 may be bonded to the outer surface of the back sheet 22 in order to reinforce the back sheet 22 and improve its feel. As the material constituting the cover sheet 25, a woven fabric or a non-woven fabric is used. In particular, it is preferable to use a nonwoven fabric or a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester as a material constituting the cover sheet 25.

(2-2-3. Absorber)
The absorber 23 is a member for absorbing liquid such as urine and holding the absorbed liquid. The absorber 23 is disposed between the liquid-permeable top sheet 21 and the liquid-impermeable back sheet 22. The absorber 23 has a function of absorbing the liquid that has passed through the top sheet 21 and is made of an absorbent material.

  A well-known material can be employ | adopted for the absorptive material which comprises the absorber 23. FIG. As an absorptive material, for example, fluff pulp, a superabsorbent polymer, or a hydrophilic sheet may be used. In addition, as the absorbent material, one type of fluff pulp, superabsorbent polymer, or hydrophilic sheet may be used alone, or two or more types may be used in combination. The absorbent material is usually formed and used in a single-layer or multi-layer mat shape.

  The absorber 23 is preferably sandwiched between at least a part between the top sheet 21 and the back sheet 22. The absorber 23 is sandwiched between the top sheet 21 and the back sheet 22 and is fixed between the top sheet 21 and the back sheet 22 by sealing the peripheral edge thereof.

  Furthermore, it is preferable that the absorber 23 is formed by encapsulating a superabsorbent polymer with a hydrophilic sheet. Thereby, it can prevent that a superabsorbent polymer leaks from a hydrophilic sheet | seat, and can stabilize the shape of the absorber 23 whole.

  The shape of the absorber 23 can be appropriately designed according to the shape, size, and use of the disposable diaper. For example, the shape of the absorber 23 may be an hourglass shape as shown in FIG. Moreover, it is good also as a rectangular type, an elliptical type, or a gourd type currently used for the general disposable diaper.

  The disposable diaper according to the present invention can be applied to diapers for infants and the elderly. Therefore, the present invention can be suitably used in industries related to childcare and nursing care.

DESCRIPTION OF SYMBOLS 10 Outer cover 11 Front body 12 Rear body 13 Inseam area 14 Tuck formation area 15 Side flap 16 Joint part 17 Upper end area 18 Fixing area 20 Inner pad 21 Top sheet 22 Back sheet 23 Absorber 24 Three-dimensional gather 25 Cover sheet 30 Tuck 31 Mountain folding Line 32 Valley fold line 33 Tuck holding part 40 Elastic elastic member 41 Elastic part around abdominal part 42 Elastic part around back part 43 Elastic part around leg part 100 Disposable diaper 200 Conventional disposable diaper

Claims (6)

A front body (11) located on the abdomen of the wearer, a back body (12) located on the back of the wearer, and a crotch region (13) located between the front body (11) and the back body (12) A disposable diaper having
The back body (12) extends in the short direction of the disposable diaper and folds in the opposite direction to the mountain fold line (31) and the mountain fold line (31) that folds toward the skin non-contact surface side of the disposable diaper. A disposable diaper having one or a plurality of tacks (30) formed by being folded at the valley fold line (32).
The tuck (30) is formed so that the valley fold line (32) is closer to the upper end of the back body (12) than the mountain fold line (31). The disposable diaper according to claim 1, wherein a top portion of the tack (30) corresponding to a fold line is upward.
The tuck (30) is formed so that the mountain fold line (31) is closer to the upper end of the back body (12) than the valley fold line (32). The disposable diaper according to claim 1, wherein a top portion of the tack (30) corresponding to a crease is downward.
The disposable diaper according to claim 1, wherein an elastic elastic member (40) is disposed along one or both of the mountain fold line (31) and the valley fold line (32).
A disposable diaper worn by the wearer,
A front body (11) located on the abdomen of the wearer, a back body (12) located on the back of the wearer, and a crotch region (13) located between the front body (11) and the back body (12) An outer cover (10) having
A liquid-absorbing inner pad (20) that is covered with the outer cover (10), extends in the longitudinal direction of the outer cover (10), and exists in a region including the crotch region;
The back body (12) of the outer cover (10) extends in the lateral direction of the outer cover 10 and folds in a mountain fold line (31) and the mountain fold that folds toward the skin non-contact surface side of the outer cover (10). A disposable diaper having one or a plurality of tacks (30) formed by folding at a valley fold line (32) that folds in a direction opposite to the line (31).
The outer cover (10) has a tack forming region (14) in which the tack (30) is formed in the back body (12),
A part of the inner pad (20) is disposed in the tack forming region (14),
The disposable diaper according to claim 5, wherein the inner pad (20) is fixed to the outer cover (10) except for a part disposed in the tack forming region (14).

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