JP5912490B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper in which a fastening tape cannot be removed due to mischief or the like of a child.

  Conventionally, a commercially available tape-type disposable diaper is provided with fastening tapes 50, 50 for attaching diapers on both sides of the back of a paper diaper for wearing as shown in FIG. After applying the front and back bodies of the paper diaper to the wearer's body, the fastening tapes 50 and 50 are brought to the ventral side, and an adhesive is applied to the surface of the liquid-impermeable sheet such as a polyethylene sheet on the outer surface of the paper diaper. The paper diaper is fixed to the front target tape 51 made of a plastic material such as polyethylene, which is fixed by (see, for example, Patent Documents 1 and 2 below).

  In such a tape-type disposable diaper, one of the concerns of parents is that the child mischiefs his / her diaper and picks and removes the end of the fastening tape (fastening tape). This may cause diaper misalignment and excrement leakage.

  The act of removing the fastening tape due to such mischief of children is often seen especially in children under 1 year old from 6 months onwards, and when the age rises from 1 year 3 months to 2 years old, the diaper itself is removed. I often take off (sometimes including clothes). Children from 6 months to 1 year of age seem to be mischievous with the sense of hand play, such as the feeling of removing the fastening tape and the reaction of their parents. On the other hand, children 1 to 3 months to 2 years old often want to show that they can undress themselves as one of the growth processes, or they often take off their diapers due to unpleasant excretion. In this way, the act of peeling off the fastening tape by mischief of a child is often seen in children from 6 months to 1 year old.

  In order to prevent the wearer from easily detaching due to such erroneous operation or mischief of the wearer, in Patent Document 3 below, a plurality of convex members (fixing elements) having a predetermined width are arranged on one surface side of the tape body. A disposable diaper is disclosed.

JP-A-7-328069 Japanese Patent Laid-Open No. 7-313552 JP-A-10-28703

  In the disposable diaper described in Patent Document 3, by providing a plurality of convex members with a predetermined width, a high shearing force is applied to the end of each convex member on the tape front end side. As a result, it becomes difficult to remove, so that it does not loosen or come off due to a mistaken operation by the wearer, etc., but the fastening tape can be removed if it is not pulled with a strong force compared to normal disposable disposable diapers. Therefore, a stronger force than usual is required for the parents who change diapers, which may be a burden on the parents.

  In addition, infants aged 7 to 9 months will move with the force of their arms while keeping their stomach on the floor, and the fastening part of the tape-type diaper will rub against the unevenness of the floor, causing the diaper to loosen or come off There is.

  On the other hand, as a solution when the fastening tape is peeled off due to a child's mischief, (1) replace the pants-type diaper, (2) guide to toilet training intended to remove the diaper, (3) rompers on the diaper For example, you can immediately put on a jacket so that children do not touch the tape. However, especially in the case of children from 6 months to 1 year old, the stool processing is relatively easy, it can be fit to fit the body shape, and the price per piece is low (1) There are many cases where it is avoided to replace the pants type, and at present the majority of parents want to use tape-type diapers. In addition, it is difficult for a baby under 1 year of age to guide to removing the diaper (2). In addition, it may be troublesome to put on a romper or other jacket immediately.

  Therefore, the main problem of the present invention is to prevent the fastening tape from being removed due to mischief of the child, especially when used for a child of about 6 months to 1 year old, and for the parent to easily attach and detach the fastening tape. It is to provide disposable diapers.

In order to solve the above-mentioned problem, as the present invention according to claim 1, an absorber is interposed between the liquid-permeable top sheet and the back sheet, and the stopper is attached to both sides of the back side so as to protrude sideways. In a disposable diaper comprising a wearing tape and a to-be-attached portion provided on the ventral outer surface to which the fastening tape is fastened,
The fastening tape includes a tape base having a base fixed to a diaper, and a fastening element provided on the inner surface side of the protruding piece portion of the tape base, and the distal end side of the fastening element. The tape base material extended from the tape base material,
The to-be-adhered portion has a plurality of notches along the diaper front-rear direction at intervals in the diaper width direction, and communicates with the inner surface side of the sheet material constituting the to-be-attached portion with the notches being open ends. Has pocket space,
When worn, in a state in which the fastening elements of the fastening tape was fastened to the object to be secured portion, Ri tare and the extending portion can be inserted from the cut in the pocket space,
A second fastening element for fastening the extension portion in the pocket space in a state where the extension portion is inserted into the pocket space from the notch is provided on the diaper outer surface side and / or the diaper inner surface side of the extension portion. Disposable diapers are provided which are characterized in that they are made .

  In the invention according to the first aspect, as the fastening tape, a fastening material is provided on the tape base material, and the extending portion of the tape base material is formed on the tip side from the fastening element. As a to-be-attached portion for fastening the tape, there are a plurality of incisions along the diaper front-rear direction at intervals in the diaper width direction, and the inner surface side of the sheet material that constitutes the to-be-attached portion with the notches being open ends It is set as the structure which has the pocket space connected to. A disposable diaper having such a fastening tape and a fastening part is a pocket in which the extension part of the fastening tape is cut from the notch while the fastening element of the fastening tape is fastened to the fastening part at the time of wearing. Since it can be inserted into the space, the child cannot pick up the end of the fastening tape and can prevent the fastening tape from being removed due to mischief. In addition, even for infants who move with the power of their arms while keeping their stomachs on the floor, the fastening part will not rub against the unevenness of the floor and the diaper will not loosen or come off, preventing the fastening tape from coming off. it can. Further, since the engagement force of the fastening element can be the same as that of a normal diaper, a stronger force than usual is not required for the parent, which is a problem in the conventional example, and the parent tape is attached and detached when the fastening tape is attached / detached. Will no longer be a burden.

Moreover, the 2nd fastening element for making it fasten in a pocket space is provided in the state which inserted the extended part into the pocket space from the notch in the diaper outer surface side and / or diaper inner surface side of the said extended part. Therefore, it is possible to prevent the extended portion from coming out of the pocket space due to the mischief of the child.

  The disposable diaper according to claim 1, wherein a finger insertion pocket that is open on the outer surface side of the diaper and in the center side in the diaper width direction is formed in the extending portion of the fastening tape as the present invention according to claim 2. Provided.

  According to the second aspect of the present invention, a finger is inserted into the finger insertion pocket by forming a finger insertion pocket that opens on the outer surface side of the diaper and on the center side in the diaper width direction in the extending portion of the fastening tape. On the other hand, since the extending portion of the fastening tape can be inserted into the pocket space, it is easy to perform the mounting operation.

According to a third aspect of the present invention, there is provided the disposable diaper according to any one of the first and second aspects, wherein the engagement force of the second fastening element is set smaller than the engagement force of the fastening element.

The invention described in claim 3 shows the relative relationship between the engagement force of the second fastening element and the fastening force of the second fastening element. By setting it smaller than the engagement force of the elements, the fastening tape can be easily attached and detached.

  As described above in detail, according to the present invention, the fastening tape cannot be removed due to mischief or the like of the child, and it is easy for the parent to attach and detach the fastening tape.

It is the partially broken expanded view seen from the diaper inner surface side of the disposable diaper 1 which concerns on this invention. It is the II-II arrow directional view. It is the expanded view seen from the diaper outer surface side. It is a figure which shows the other example of a form of the front target tape. It is a perspective view of the disposable diaper 1 which shows a mounting state. (A), (B) is a figure which shows the attachment point of the fastening tape 10. FIG. It is a figure which shows the other example of a fastening tape. It is a perspective view of the conventional disposable diaper.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the present invention, the “diaper outer surface side” means the outer back sheet 2 side and the non-skin contact surface side, and the “diaper inner surface side” means the liquid-permeable top sheet 3 side. It is a skin contact surface side (use surface side).

[Basic structure of disposable diapers]
In FIG. 1, a tape-type disposable diaper 1 (also simply referred to as diaper 1) is made of cotton-like pulp or the like, has a certain degree of rigidity, for example, rectangular (or hourglass shape), and is surrounded by crepe paper 5. The absorbent body 4, the liquid-permeable top sheet 3 made of a perforated or non-porous nonwoven fabric or a perforated plastic sheet, etc., disposed so as to cover the inner surface of the diaper of the absorbent body 4, and the absorbent body 4. A leakage preventing sheet 6 made of polyethylene or the like disposed on the outer surface side of the diaper and covering at least the entire area of the absorber 4 and a nonwoven fabric provided on the outer surface side of the diaper of the leakage preventing sheet 6. In addition, the outer back sheet 2 defining the outer shape of the diaper and the three-dimensional gather BS standing on the surface side are formed on both sides of the diaper. And the side nonwoven fabrics 7 and 7 for comprising side flap part SF with the back sheet 2, Fastening tapes 10 and 10 provided in the diaper back | dorsal side both sides, The front target for fastening the said fastening tapes 10 and 10 It is mainly composed of the tape 11. Moreover, in the abdominal waist part and back side waist part of a diaper, the said outer surface back sheet 2, the leak-proof sheet 6, and the liquid-permeable top sheet 3 are all extended, and the end flap part EF in which the absorber 4 does not exist is formed. ing.

In the following, each component will be specifically described in detail.
The absorbent body 4 is made of, for example, fluffy pulp and a water-absorbing polymer, and the planar shape can be a substantially hourglass shape having constricted portions on both sides in order to reduce the contact with the legs. However, it is a rectangle in the illustrated example. The water-absorbing polymer is mixed in the pulp constituting the absorber, for example, as granular powder. Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolved pulp, and artificial cellulose fibers such as rayon and acetate. Softwood pulp having a longer fiber length than hardwood pulp functions and It is preferably used in terms of price.

  As the liquid-permeable top sheet 3, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. Examples of the material fibers constituting the nonwoven fabric include synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a lace method, a spun bond method, a thermal bond method, an air through method, a melt blown method, or a needle punch method can be used.

  The leak-proof sheet 6 is made of a sheet material having at least a water shielding property such as an olefin resin sheet such as polyethylene or polypropylene, and is installed in a range covering at least the entire area of the absorber 4 in order to prevent leakage. In recent years, those having moisture permeability are preferably used from the viewpoint of preventing stuffiness.

  As the side nonwoven fabric 7, a water repellent nonwoven fabric can be used. As the water-repellent nonwoven fabric, for example, a water-repellent treated nonwoven fabric coated with a silicon-based, paraffin-based, alkylchromic chloride-based water repellent, or the like can be used to prevent body fluids from penetrating or to feel the skin. Functions such as enhancing can be added.

  The liquid-permeable top sheet 3 protrudes slightly outward from the side edge of the absorbent body 4 and is joined to the central portion of the leak-proof sheet 6 and the side nonwoven fabric 7. The side nonwoven fabric 7 has an outer portion extending to the outer edge rather than the vicinity of the side edge portion of the absorbent body 4 and is joined to the leakage preventing sheet 6 and the outer back sheet 2, and the laminated sheet portion constitutes a side flap SF. Yes.

  In the side flap portion SF, a plurality of elastic stretch members 8 and 8 are arranged in the longitudinal direction of the diaper, and in the illustrated example, a flat gather is formed. This flat gather holds the diaper tightly around the legs when worn, thereby improving fit and preventing the diaper from shifting.

  On the other hand, a three-dimensional gather BS standing on the surface side is formed by the nonwoven fabric sheet portion on the inner side of the fixed portion of the side nonwoven fabric 7. This three-dimensional gather BS has a standing end near the side edge of the absorbent body 4, and its tip is folded back twice along the longitudinal direction of the diaper. If necessary, a plurality of elastic elastic members are provided, and the three-dimensional gather BS is erected using the elastic force.

  As the elastic elastic members 8 and 9, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester and the like that are usually used can be used. .

  A nonwoven fabric is used as the outer back sheet 2. As the material fibers constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. A nonwoven fabric obtained by an appropriate processing method such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, or a needle punch method can be used.

  In this disposable diaper 1, in order to improve adhesion to the wearer, a plurality of elastic elastic members 13, 13... Are bonded in an expanded state on the inner surface side of the outer back sheet 2 around the waist on the back side of the diaper. Elastic stretching force is given along the direction.

[Fastening structure with fastening tape]
Next, a fastening structure using a fastening tape (fastening tape 10) will be described. The fastening tape 10 includes a tape base material 15 and a fastening element 16. The tape base material 15 is made of plastic, polylaminated nonwoven fabric, nonwoven fabric, paper, or the like. The base portion 15A is fixed between the back side nonwoven fabric 7 and the outer backsheet 2, and the protruding piece portion 15B is an outer surface backsheet. 2 and the side edges of the side nonwoven fabric 7 protrude sideways. The fastening element 16 is fixed to the inner surface side of the diaper of the protruding piece portion 15B of the tape base 15 so as not to be peeled off, and includes a hook element having a number of male / female mechanical fastener functions on the surface. Further, the fastening tape 10 has an extending portion 17 of the tape base material 15 in which the tape base material 15 is extended to the tip side from the fastening element 16.

  The hook element of the fastening element 16 may be any shape such as a letter shape, a J shape, a mushroom shape, and a T shape, but preferably has a low pulling force when being inserted. It has a strong letter shape or J shape. In this embodiment, a fastening tape having a male / female mechanical fastener function composed of hook elements is used. Instead, a fastening tape having a known fastening element such as an adhesive type is used. Can do.

  On the other hand, on the outer surface of the front body of the diaper 1 (the outer surface of the outer back sheet 2), the front target tape 11 having a female / male mechanical fastener function is peeled off by applying an adhesive such as hot melt to a predetermined area. The diaper 1 is worn on the body by being fastened to the fastening element 16 of the fastening tape 10. When the fastening element 16 of the fastening tape is an adhesive type, the front target tape 11 is constituted by a fastened portion having a fastening function corresponding thereto.

  The length of the front target tape 11 in the longitudinal direction of the diaper from the abdomen end to the abdomen end of the front target tape 11 is preferably 20 to 60 mm for products having a diaper longitudinal length of 300 to 600 mm. The length of the front target tape 11 in the front-rear direction of the diaper is preferably 30 to 60 mm. The front target tape 11 is formed with a plurality of notches 18, 18... In the left and right directions with respect to the center line in the width direction in the illustrated example along the diaper front-rear direction at intervals in the diaper width direction. ing. The cut 18 is formed in an intermediate portion that does not reach the edge of the front target tape 11 in the width direction (diaper front-rear direction), and is formed at least as long as the width of the extending portion 17 of the fastening tape 10. In order to prevent mischief such as a child inserting a finger, the notch 18 preferably has a structure having almost no gap cut by a cutter device, but is formed in a slit shape having a slight gap that does not allow a child's finger to enter. You can also

  The notch 18 is preferably provided substantially along the diaper front-rear direction at the center of the front target tape 11 in the front-rear direction, and the length from the end of the notch 18 to the end of the front target tape 11 is 3-10 mm. preferable. The shape of the notch 18 may be any shape such as an I shape, a dogleg shape, a reverse letter shape, and a wave shape. The end of the notch 18 may be parallel to the diaper width direction so that the notch 18 spreads out and does not tear to the end of the front target tape 11 by inserting a finger.

  The front target tape 11 communicates with the inner surface side of the front target tape 11 (between the front target tape 11 and the outer back sheet 2) corresponding to each of the notches 18, with the notches 18 being open ends. A pocket space 19 is formed.

  In order to form the pocket space 19, as shown in FIG. 3, when the front target tape 11 is bonded to the outer back sheet 2 with an adhesive such as hot melt, the adhesive is applied only to the formation area of the pocket space 19. It can be formed by making it a region that does not. In FIG. 3, the dotted cross-hatched portion of the front target tape 11 is a region where the adhesive is applied, and the white portion is a region where the adhesive is not applied (pocket space 19).

  The pocket space 19 is formed on the center side in the diaper width direction from the notches 18 with each notch 18 as an open end. In other words, the opening end (cut 18) of the pocket space 19 is formed outward in the diaper width direction. In the example shown in FIG. 3, the pocket space 19 has a width substantially equal to the length of each cut 18 and is formed with a predetermined depth, and is formed independently with respect to each cut 18. As another embodiment, as shown in FIG. 4A, a pocket space 19 in a non-adhesive region can be formed across the width direction of the front target tape 11. Further, as shown in FIG. 4B, a plurality of pocket spaces 19 formed on the same side with respect to the center line in the width direction can be formed to communicate with each other.

  By providing this pocket space 19, a non-adhesive region in which the front target tape 11 is not bonded to the outer back sheet 2 is formed, and therefore, the advantage of improving the fit and flexibility of the abdomen as compared to the case where the entire surface is bonded. There is.

  The depth (length in the diaper width direction) from the notch 18 of the pocket space 19 is formed to be greater than the length of the extension part 17 in the diaper width direction, and the extension part 17 is sufficiently deeply inserted. Yes.

  When the diaper 1 having the fastening tape 10 and the front target tape 11 is mounted, the fastening element 16 of the fastening tape 10 is fastened to the front target tape 11 as shown in FIGS. 5 and 6. The extending portion 17 is inserted into the pocket space 19 from the notch 18. Thereby, since it becomes impossible for a child to pick the edge part of the fastening tape 10, it can prevent removing the fastening tape 10 by mischief. Further, since the fastening tape 10 can be prevented from coming off, it is possible to prevent the diaper from being displaced and leaking. Furthermore, since the engaging force of the fastening element 16 is the same as that of a normal diaper, the fastening tape 10 can be peeled off with the same force as that of a normal diaper for the parent, and there is no burden on the parent when the fastening tape 10 is attached or detached. .

  Next, a modified example of the fastening tape 10 will be described. As shown in FIG. 6, a finger insertion pocket 20 that opens to the extending portion 17 of the fastening tape 10 on the outer surface side of the diaper and on the center side in the diaper width direction. Can be formed. By forming the finger insertion pocket 20, the extension portion 17 can be inserted into the pocket space 19 from the cut 18 while inserting a finger into the finger insertion pocket 20, so that the operation is facilitated. Since the finger insertion pocket 20 is used when the extension portion 17 is inserted into the pocket space 19, the finger insertion pocket 20 is formed in the range of the extension portion 17, and is fastened inside the extension portion 17. It is not preferable to extend the element 16 to such an extent.

  The finger insertion pocket 20 is formed in a bag shape opened to the center side in the diaper width direction by folding the tip of the tape base material 15 toward the outer surface of the diaper and joining both ends by thermocompression bonding or the like. Alternatively, another member may be laminated on the outer surface side of the diaper of the tip portion of the tape base material 15, and the peripheral portions of the three sides may be joined. When different members are stacked, a structure that allows easy insertion of a finger, such as using a material that is more stretchable than the tape base material 15, can be used.

  As shown in FIGS. 6 and 7, the extended portion 17 is inserted into the pocket space 19 from the notch 18 into the pocket space 19 on the diaper outer surface side and / or the diaper inner surface side of the extended portion 17. It is preferable to provide a second fastening element 21 for fastening. FIG. 6A shows a case where the second fastening element 21 is formed on the diaper outer surface side of the extension portion 17 (the diaper outer surface side of the finger insertion pocket 20 formed as a double sheet), and FIG. 7 shows the extension portion. This is a case where the second fastening element 21 is formed on the inner surface of the diaper 17. Moreover, although not shown in figure, you may provide in these both surfaces. When the finger insertion pocket 20 is formed, the finger is inserted into the finger insertion pocket 20, and the front target tape 11 in the pocket space 19 is pulled up to the outer surface side of the diaper with the inserted finger. 7 is not provided on the outer surface side of the diaper but is provided only on the inner surface side of the diaper, so that the mounting operation is easier. . On the other hand, when the extension part 17 is inserted by picking up the front target tape 11 in the pocket space 19 with the finger on the opposite side, the one provided only on the outer surface side of the diaper shown in FIG. Become.

  The engaging force of the second fastening element 21 in the pocket space 19 is preferably set to be smaller than the engaging force of the fastening element 16 on the secured portion (front target tape 11). Accordingly, the insertion of the extension 17 into the pocket space 19 can be reduced, and the insertion of the second fastening element 21 can be reduced, and the fastening tape 10 can be easily peeled off. become.

[Other examples]
(1) In the embodiment described above, the to-be-attached portion is formed by providing the front target tape 11, but the fastening tape 10 is directly attached to the outer surface of the outer back sheet 2 without the front target tape 11. The same applies to disposable diapers. In this case, the to-be-attached part refers to a predetermined area where the fastening tape 10 is fastened, the notch 18 is provided directly in the outer back sheet 2, and the pocket space 19 is provided between the outer back sheet 2 and the leak-proof sheet 6. Can be formed.
(2) The second fastening element 21 is preferably a mechanically joined type having hook elements having a number of male / female mechanical fastener functions on the surface, but the inside of the pocket space 19 is made of a plastic sheet. In this case, it is preferable that the second fastening element 21 disposed on the surface facing the surface is an adhesive type. For example, when the fastening element 16 of the fastening tape is made of an adhesive type and the front target tape 11 is made of a plastic sheet, the second fastening element 21 disposed on the outer surface side of the extending portion 17 in the diaper. Is preferably an adhesive type. Further, by providing a cut 18 directly in the outer back sheet 2 and forming the pocket space 19 between the outer back sheet 2 and the leak-proof sheet 6 as in the other embodiment (1), When one side of is comprised with a plastic sheet (leak-proof sheet 6), it is preferable to make the 2nd fastening element 21 arrange | positioned at the diaper inner surface side of the extension part 17 into an adhesive type.

  DESCRIPTION OF SYMBOLS 1 ... Disposable diaper (diaper), 2 ... Outer surface back sheet, 3 ... Liquid-permeable top sheet, 4 ... Absorber, 5 ... Crepe paper, 6 ... Leak-proof sheet, 7 ... Side nonwoven fabric, 8 ..., 9, 13 ... Elastic elastic member, 10 ... Fastening tape, 11 ... Front target tape, 15 ... Tape base material, 16 ... Fastening element, 17 ... Extension part, 18 ... Notch, 19 ... Pocket space, 20 ... Pocket for finger insertion, 21 ... Second fastening element

Claims (3)

An absorbent body is interposed between the liquid-permeable top sheet and the back sheet, and a fastening tape that protrudes laterally on both sides of the back side and a fastening tape that is provided on the outer surface of the ventral side and stops. In a disposable diaper comprising a to-be-attached part to be attached,
The fastening tape includes a tape base having a base fixed to a diaper, and a fastening element provided on the inner surface side of the protruding piece portion of the tape base, and the distal end side of the fastening element. The tape base material extended from the tape base material,
The to-be-adhered portion has a plurality of notches along the diaper front-rear direction at intervals in the diaper width direction, and communicates with the inner surface side of the sheet material constituting the to-be-attached portion with the notches being open ends. Has pocket space,
When worn, in a state in which the fastening elements of the fastening tape was fastened to the object to be secured portion, Ri tare and the extending portion can be inserted from the cut in the pocket space,
A second fastening element for fastening the extension portion in the pocket space in a state where the extension portion is inserted into the pocket space from the notch is provided on the diaper outer surface side and / or the diaper inner surface side of the extension portion. Disposable diapers characterized by being made .   The disposable diaper according to claim 1, wherein a finger insertion pocket is formed in the extending part of the fastening tape and is open to the outer surface side of the diaper and to the center side in the diaper width direction. The disposable diaper according to claim 1, wherein an engagement force of the second fastening element is set smaller than an engagement force of the fastening element.

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