JP5113341B2 - Disposable paper diapers - Google Patents

Description

  The present invention is a so-called tape-type disposable paper diaper, that is, a fastening tape is provided on both sides of either the back side or the abdominal side, and either side of either the back side or the abdominal side is used by using this fastening tape. The present invention relates to a disposable paper diaper that is worn on the body by being fixed to the other side.

FIG. 9 shows a conventional disposable tape-type disposable diaper for adults. This paper diaper includes a liquid-impervious back sheet 50 having a diaper shape, a liquid-permeable front sheet 51, and an absorption interposed therebetween. A pair of upper and lower fastening tapes 53, 53 projecting laterally from both sides on the back side, and joining the pair of fastening tapes 53, 53 to the target tape 54 on the ventral surface It is designed to be worn on the body (see, for example, Patent Documents 1 and 2).
In general, an adhesive or a hook-and-loop fastener is used as a joining means between the fastening tapes 53 and 53 and the target tape. However, the latter can increase the joining force, and it is difficult to reduce the joining force even after repeated peeling. It is widely used.
Japanese Utility Model Publication No. 6-31726 JP 2002-95793 A

However, the conventional products have the following problems. That is, firstly, there is a problem that air permeability is hindered by the presence of the target tape, fit property is lowered due to increased rigidity, or material cost is increased accordingly.
In order to solve such problems, it is also used in infant diapers, for example, that the outermost surface of a diaper is formed of a non-woven fabric without providing a target tape, and the non-woven fabric itself is used instead of the target tape. However, the strength (durability with respect to fixation) tends to be insufficient in the nonwoven fabric.
Secondly, since the back side and the abdomen side are fixedly connected, there is a problem that the body cannot follow the movement of the body and is easily displaced.
Third, there is a problem that it is difficult to match the size when fastening the fastening tape. Conventional products are difficult to understand because they hold the ventral side with one hand and grip the dorsal fastening tape with the other hand and press it against the ventral surface. For this reason, it is fixed while predicting the tightening degree, but it is often not possible to adjust the joining position. Furthermore, since the adjustment is also predicted from the previous fastening result, if the prediction is lost, it is readjusted, and if it is used as it is, the fit feeling deteriorates and the excrement leaks due to the reduced fit.
Therefore, a main problem of the present invention is to provide a tape-type disposable paper diaper that does not require a target tape that covers the ventral surface over a wide range, is difficult to shift with respect to body movement, and is easy to adjust in size. .

<Invention of Claim 1>
The base end of the fastening tape is connected to both sides of either one of the back side and the ventral side,
A first joint is provided on the front end side of this fastening tape,
Providing a second joint to be joined to the first joint on the proximal side of the fastening tape or in the vicinity of the proximal end of the fastening tape,
On both sides of the other side of the dorsal side and the ventral side, respectively provided with insertion parts for inserting the fastening tape,
An intermediate portion between the first joint portion and the second joint portion is separated,
The first fastening portion of the fastening tape is inserted through the insertion portion and then folded and joined to the second joining portion, and the fastening tape is configured to be attached to the body. A first base material projecting to the outer surface of the one part, a distal end side projecting to the side of the one part, and a base end part to the inner surface of the one part, A second base material whose side protrudes to the side of the one part is formed by being pasted and integrated in the protruding part ,
In the mounted state, the distal end of the first substrate and the distal end of the second substrate are positioned on the distal end side from the folded position, and the proximal end of the first substrate and the second substrate The proximal end is located closer to the proximal end than the folded position ,
A disposable paper diaper characterized by that.

(Function and effect)
The paper diaper according to the present invention includes an insertion portion in which a first joint portion of a fastening tape connected to either one of the back side and the abdomen side is formed on either side of the back side or the abdomen side, respectively. After being inserted into the body, it is folded and is attached to the body by joining to the second joint portion in the vicinity of the proximal end portion of the fastening tape or the proximal end portion of the fastening tape. Therefore, since there is no need to provide a conventional target tape, it is possible to improve the air permeability in the portion where the conventional target tape is provided, improve the fit by suppressing the increase in rigidity, and reduce the material cost.
Further, in the fastened state, since the fastening tape is only passed through the insertion part in an annular shape, the fastening tape can be rotated with respect to the insertion part, and the back side and the abdomen side are connected in a movable state. Will be. Therefore, the back side and the abdominal side can independently follow the movement of the body, and are difficult to shift with respect to the movement of the body.
Furthermore, in the present invention, at the time of fastening, since the first joining portion of the fastening tape is passed through the insertion portion and then folded and joined to the second joining portion, joining is performed while applying a force in the actual tightening direction. It will be. Therefore, since joining can be performed while feeling an actual tightening force (at least a force very close to it), size matching becomes easy. Moreover, even if the joining position is adjusted by releasing the joining, the state in which the first joining portion of the fastening tape is folded through the insertion portion, that is, the state where the dorsal side and the abdominal side are connected is maintained and actually Because it can be joined while feeling the tightening force, adjustment is very easy.

<Invention of Claim 2>
The first joint is made of a hook tape having hook-like protrusions on the surface, and the second joint is made of a female tape having a surface on which the hook-like protrusions are detachably hooked. The disposable disposable diaper described.

(Function and effect)
As the joining means of the present invention, an adhesive can also be used, but it is difficult to ensure the bonding strength, the point that it is difficult to pass through the insertion part when an adhesive is used for the first joint, the ease of fastening, etc. In view of the above, it is preferable to adopt a hook-and-loop fastener in the combination described in this section.

<Invention of Claim 3>
The disposable paper diaper of Claim 1 or 2 comprised so that the said folding | folding may be made in the said intermediate part.

(Function and effect)
By configuring as described in this section, there is an advantage that the folded portion of the fastening tape is not bulky and the sliding with respect to the insertion portion when adjusting the size can be improved.

<Invention of Claim 4>
The disposable paper diaper according to any one of claims 1 to 3, wherein at least the intermediate portion is elastically expanded and contracted.

(Function and effect)
As the fastening tape elastically expands and contracts in this way, the size adjustment range is widened, the adjustment work is facilitated, and the followability to the movement of the body is improved.

<Invention of Claim 5>
The disposable paper diaper according to any one of claims 1 to 4, wherein the insertion part is a slit opened on both sides of the other part.

(Function and effect)
The insertion part of the present invention can be easily formed by forming slits on both sides of either the back side or the abdomen side.

<Invention of Claim 6>
The disposable paper diaper according to claim 5, wherein a reinforcing sheet is laminated and fixed on both sides of the other portion, and the slit is opened inside a peripheral edge of the reinforcing sheet.

(Function and effect)
When the insertion portion is formed of a slit, there is a risk that the material will be torn due to the force concentrated on both ends of the slit during mounting. For this reason, as described in this section, it is preferable to form a slit inside a portion reinforced in advance with a reinforcing sheet to prevent tearing at both ends of the slit.

<Invention of Claim 7>
In each of the vicinity of both ends of the slit, a slit having a starting end on one side and an end on the other side across the extension line, and a curvilinear cut swelled on the opposite side to the slit center side is formed. Item 7. A disposable paper diaper according to item 5 or 6.

(Function and effect)
The tearing of both ends of the slit can also be prevented by forming such a cut. That is, even if tearing occurs from both ends of the slit, if there is a break as described in this section, for example, a U-shaped or C-shaped break having an entrance on the slit side, After reaching the cut, the force is distributed and received throughout the cut, and the progress of the tear is suppressed.

<Invention of Claim 8>
The disposable according to any one of claims 1 to 4, wherein the insertion part is a tape thread formed by fixing only both ends of the sheet-like member to either one of the front and back surfaces of both sides of the other part. Paper diapers.

(Function and effect)
The insertion portion can be easily formed by tape threading as described in this section (having a structure similar to a so-called belt threading or belt hole). In this case, at the time of fastening, the tape is passed back through the fastening tape into the gap between the intermediate portion (portion between the fixed portions at both ends) of the tape thread and the opposing surface. Although the tape threading itself may come off from the main body, there is an advantage that tearing of the main body such as a slit does not occur in principle.

<Invention of Claim 9>
The disposable paper diaper according to any one of claims 1 to 8, wherein a plurality of the insertion portions are provided on both side portions of the other portion at intervals in the width direction.

(Function and effect)
As described in this section, when a plurality of insertion portions are provided at intervals in the width direction, the size can be adjusted by appropriately selecting the insertion portion through which the fastening tape is passed. This size adjustment is suitable for a rough adjustment to some extent that cannot be adjusted at the joint position between the first and second joints rather than a fine adjustment.

  As described above, according to the present invention, there is no need for a target tape that covers the ventral surface over a wide range, and there are advantages such as being difficult to shift with respect to the movement of the body and easy size adjustment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a view showing an outer surface side of a disposable diaper according to the present invention, and FIG. 2 is a partially cutaway view showing an inner surface side. This paper diaper includes an absorbent 3 having a certain degree of rigidity, such as an hourglass shape or a rectangle, made of cotton-like pulp between a liquid-impervious back sheet 1 and a liquid-permeable top sheet 2 made of a nonwoven fabric or the like. It is something that is intervened. The absorber 3 can be wrapped with crepe paper (not shown) to maintain its shape.

  As the liquid-impermeable back sheet 1, in addition to a polyethylene film or the like, in recent years, a sheet having moisture permeability without impairing water shielding properties has been used from the viewpoint of preventing stuffiness. This water and moisture permeable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. is there. On the other hand, as the liquid-permeable top sheet 2, a porous or non-porous nonwoven fabric or a perforated plastic sheet is used. As the raw material fibers constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene such as olefin, polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.

  The liquid-impervious backsheet 1 extends outward from the periphery of the absorber 3 to form a substantially hourglass shape, and the laterally extending portion together with the side portion of the barrier sheet 4 is the presence of the absorber. The side flap part SF which does not perform is comprised. The liquid-permeable top sheet 2 has an hourglass shape that is slightly larger than the absorbent body 3, and a portion that extends slightly outward from the side edge of the absorbent body 3 is between the barrier sheet 4 and the liquid-impermeable back sheet 1. It is interposed and fixed to the liquid-impermeable backsheet 1 side by a hot melt adhesive. As a material for forming the barrier sheet 4, a plastic sheet or a melt blown nonwoven fabric can be used, but from the viewpoint of touch to the skin, a nonwoven fabric that is water-repellent treated with silicon or the like is preferably used.

  At both ends in the longitudinal direction of the disposable diaper, i.e., the ventral side and the back side, the liquid-impervious backsheet 1 and the liquid-permeable topsheet 2 extend together to form an end flap portion EF in which the absorbent body 3 does not exist. In the side end flap portion EF, a plurality of, in the illustrated example, three thread-like elastic elastic members 7, 7... Are arranged along the width direction. As the thread-like elastic elastic member 7, 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.

  In addition, a pair of upper and lower fastening tapes 5 and 5 are provided on both side portions of the back end flap portion EF so as to protrude sideways. The fastening tape 5 has a base end portion affixed to the outer surface on the back side, a first base material 5a whose front end side projects to the side of the end flap EF, and a base end portion affixed to the inner surface of the back side. And the second base material 5b whose tip side projects to the side of the end flap EF is pasted and integrated at the projecting portion, and the longitudinal direction (projection direction) on the outer surface of the integrated base material ) The middle intermediate portion 8 is a non-joined portion, the proximal end side is a second joined portion 6, and the distal end side is a first joined portion 9. The distal end of the first joining portion 9 is located slightly on the proximal end side from the distal end of the base material 5a, and the protruding portion 5p of the base material serves as a knob.

  As the base materials 5a and 5b of the fastening tape, films and nonwoven fabrics having a general composition including polypropylene and polyethylene can be used.

  The 1st junction part 9 consists of a hook tape which has many hook-like protrusions (for example, mushroom shape etc.) on the whole surface, and the 2nd junction part 6 is the surface (a hook-like protrusion is hooked in a detachable manner ( For example, a female tape having a large number of loops). These hook tape and female tape are fixed to the base material 5a of the fastening tape 5 by a hot melt adhesive or the like.

  On the other hand, a pair of upper and lower slits 10 and 10 are opened on both sides of the ventral end flap portion EF at height positions corresponding to the upper and lower fastening tapes 5 and 5 as insertion portions for the fastening tapes 5 and 5. Has been. The slit 10 is not particularly limited as long as the fastening tape 5 can penetrate, but in the illustrated form, the slit 10 is fastened along the height direction to the side flap portion SF where the back sheet 1 and the barrier sheet 4 are bonded together. It is formed by making a notch slightly longer than the width of.

In addition, in order to prevent tearing at both ends of the slit 10, the reinforcing sheet 11 is attached in advance so as to cover the position where the slit 10 is inserted, so that the slit 10 fits inside the peripheral portion of the reinforcing sheet 11. Preferably formed. The reinforcing sheet 11 can be provided on both the front and back surfaces as in the illustrated example, or can be provided on either the front or back surface, or between sheets such as the back sheet 1 and the side sheet 4. As the reinforcing sheet 11, a sheet having a basis weight of about 50 to 90 g / m ² and a tear strength defined by JIS L1096: 1999 of 3.0 kgf or more can be used. As such a sheet, for example, various nonwoven fabrics such as a PP spunbond nonwoven fabric and a CPP film can be used. It is also a preferable form that the fiber orientation direction of the reinforcing sheet and the fiber orientation direction of the material of the reinforcing part are crossed at a predetermined angle such as a right angle.

  Further, in the illustrated embodiment, the slit 10 has a start end on one side and a termination end on the other side across the slit 10 or an extension line thereof, and an intermediate portion swells on the opposite side of the slit center side, for example, C. A curved cut line 12 such as a letter shape or a U-shape is formed. Even if tearing occurs from both ends of the slit 10, if such a slit 12 exists at the destination of the tear, after the tear reaches the slit 12, the force is distributed and received throughout the slit 12. The progress of tearing is suppressed. The cut 12 is preferably used in combination with the reinforcing sheet 11, but the cut 12 can be provided without providing the reinforcing sheet 11. In addition to these, or in place of these, other known tear preventing means may be employed.

  At the time of wearing, with the paper diaper applied to the body, as shown in FIGS. 4 and 5, the first joining portion 9 at the front end side of the fastening tape 5 is inserted through the slit 10 and then folded back at the intermediate portion 8. The fastening tape 5 is joined to the second joint 6 on the base end side. At this time, the force can be applied in the actual tightening direction, and the joining can be performed while feeling the actual tightening force (at least a force very close to it). When unbonding and re-adjusting the bonding position, peeling and bonding are performed while maintaining the state where the first bonding portion 9 of the fastening tape 5 is folded through the slit 10, that is, the state where the dorsal side and the ventral side are connected. be able to. In the fastened state, the fastening tape 5 is only passed through the slit 10 in an annular shape, the fastening tape 5 can be rotated with respect to the slit 10, and the back side and the ventral side are connected in a movable state. It will be.

<Others>
(A) The insertion part may be a tape threader 20 as shown in FIGS. That is, the both ends 21 and 22 of the elongate sheet-like member 20 are fixed to the insertion portion forming portion in the up and down direction at an interval wider than the fastening tape width, and the intermediate portion 23 is not fixed. As shown in FIG. 7B, it is also possible to adopt a form in which the fastening tape 5 is folded between the intermediate portion 23 and the facing surface. The tape threader 20 is preferably provided on the outer surface of the abdomen (in the illustrated example, the back surface of the liquid-impermeable backsheet 1), but can also be provided on the inner surface of the abdomen (in the illustrated example, the surface of the side sheet 4).

  (B) In the case of the present invention, when expanding the adjustment range of the joining position of the fastening tape 5, it is necessary to lengthen the fastening tape 5 and bring the insertion portion such as the slit 10 close to the center in the width direction. Considering the ease of handling, the mutual arrangement of members, etc., an excessive change in the position of the fastening tape 5 and the insertion portion is not preferable.

  Therefore, it is also a preferred form that the joining position adjusting method is made in two stages by the following means. That is, the first means is configured such that at least the intermediate portion 8 of the fastening tape 5 elastically expands and contracts by forming the bases 5a and 5b of the fastening tape 5 with elastic elastic members such as rubber sheets. (Not shown). In this case, the size adjustment range is widened by elastic expansion and contraction of the fastening tape 5. Furthermore, since it expands and contracts with respect to the movement of the body after wearing, it is difficult to shift.

  As shown in FIG. 8, the second means is provided with a plurality of insertion portions such as the slits 10 on both side portions at intervals in the width direction. In this case, it is possible to roughly adjust the size by appropriately selecting the insertion portion through which the fastening tape 5 is passed.

  (C) In the above embodiment, the first joint 9 is formed of hook tape and the second joint 6 is formed of female tape. Conversely, the first joint 9 is formed of female tape, and the second The joint portion 6 can be formed of hook tape.

  (D) In the above embodiment, an example in which a hook-and-loop fastener is used as the joining means of the fastening tape 5 has been shown, but one of the first and second joints 9 and 6 is formed of an adhesive layer, and the other It is also possible to adopt a form in which the film is formed with a tape that is smooth and excellent in adhesiveness and is detachably bonded by the adhesiveness of the adhesive layer.

  (E) In the said form, although the fastening tape 5 is provided in the back | dorsal side, it can also be provided in the ventral | abdominal side. Further, in the present invention, as long as the fastening tape 5 is provided on either the abdomen side or the back side and the insertion part is provided on the other side, the fastening tape and the insertion part are respectively provided on both the abdomen side and the back side. It can also be provided.

  (F) In the above embodiment, the second joining portion 6 is provided on the proximal end side of the fastening tape 5. However, as long as the first joining portion 9 is joined, a sheet (non-existent) near the proximal end portion of the fastening tape 5 is provided. It can also be provided on a liquid-permeable back sheet or side sheet).

  (G) Although the tape threading 20 in the above example is provided in place of the slit 10, both the slit 10 and the tape threading 20 may be provided, and both may be used together or selected by the user.

  The present invention can be used in a tape-type paper diaper.

It is a figure which shows the expansion | deployment state outer surface side of the disposable paper diaper which concerns on this invention. It is a figure which shows the expansion | deployment state inner surface side of the disposable paper diaper which concerns on this invention. It is an enlarged view of a slit part. It is a principal part expanded sectional view which shows the fixation point of the form which has a slit. It is a side view which shows a mounting state. It is an enlarged view of a tape threading part. It is a principal part expanded sectional view which shows the fixation point of the form which has a tape loop. It is an insertion part enlarged view of other forms. It is a figure which shows the expansion | deployment state inner surface side of the conventional tape-type paper diaper.

DESCRIPTION OF SYMBOLS 1 ... Liquid impervious back sheet, 2 ... Liquid permeable top sheet, 3 ... Absorber, 4 ... Barrier sheet, 5 ... Fastening tape, 6 ... 2nd junction part, 7 ... Thread-like elastic elastic member, 8 ... Middle Part, 9 ... first joint part, 10 ... slit, 11 ... reinforcing sheet, 12 ... cut, 20 ... tape threading.

Claims (9)

The base end of the fastening tape is connected to both sides of either one of the back side and the ventral side,
A first joint is provided on the front end side of this fastening tape,
Providing a second joint to be joined to the first joint on the proximal side of the fastening tape or in the vicinity of the proximal end of the fastening tape,
On both sides of the other side of the dorsal side and the ventral side, respectively provided with insertion parts for inserting the fastening tape,
An intermediate portion between the first joint portion and the second joint portion is separated,
The first fastening portion of the fastening tape is inserted through the insertion portion and then folded and joined to the second joining portion, and the fastening tape is configured to be attached to the body. A first base material projecting to the outer surface of the one part, a distal end side projecting to the side of the one part, and a base end part to the inner surface of the one part, A second base material whose side protrudes to the side of the one part is formed by being pasted and integrated in the protruding part ,
In the mounted state, the distal end of the first substrate and the distal end of the second substrate are positioned on the distal end side from the folded position, and the proximal end of the first substrate and the second substrate The proximal end is located closer to the proximal end than the folded position ,
A disposable paper diaper characterized by that.   The first joint is made of a hook tape having hook-like protrusions on the surface, and the second joint is made of a female tape having a surface on which the hook-like protrusions are detachably hooked. The disposable disposable diaper described.   The disposable paper diaper of Claim 1 or 2 comprised so that the said folding | folding may be made in the said intermediate part.   The disposable paper diaper according to any one of claims 1 to 3, wherein at least the intermediate portion is elastically expanded and contracted.   The disposable paper diaper according to any one of claims 1 to 4, wherein the insertion part is a slit opened on both sides of the other part.   The disposable paper diaper according to claim 5, wherein a reinforcing sheet is laminated and fixed on both sides of the other portion, and the slit is opened inside a peripheral edge of the reinforcing sheet.   In each of the vicinity of both ends of the slit, a slit having a starting end on one side and an end on the other side across the extension line, and a curvilinear cut swelled on the opposite side to the slit center side is formed. Item 7. A disposable paper diaper according to item 5 or 6.   The disposable according to any one of claims 1 to 4, wherein the insertion part is a tape thread formed by fixing only both ends of the sheet-like member to either one of the front and back surfaces of both sides of the other part. Paper diapers.   The disposable paper diaper according to any one of claims 1 to 8, wherein a plurality of the insertion portions are provided on both side portions of the other portion at intervals in the width direction.

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