JP4638368B2 - Disposable absorbent article - Google Patents

Description

  The present invention relates to a disposable absorbent article such as a fastening tape type, a pants-type disposable diaper, or a sanitary napkin, and particularly preferably applied to a disposable diaper of a type in which an absorbent pad type disposable paper diaper is used in combination. be able to.

In recent years, disposable absorbent articles such as disposable paper diapers and sanitary napkins are often used which are provided with leak-proof means such as leak-proof gathers, three-dimensional gathers, and double cuffs. And in disposable paper diapers equipped with this type of leak-proof means, when the amount of body fluid is large and a greater absorbency is required, especially when used as a diaper for adults, it is absorbent and economical. In view of the above, there is an additional use in which an absorbent pad that does not have barrier cuffs on both sides or a pad-type diaper that has barrier cuffs on both sides is used in an auxiliary manner on the absorbent body. In the following, unless otherwise noted, an absorbent pad or a pad-type diaper that is stacked on the use surface side of the main body of the paper diaper is referred to as an “auxiliary pad”.
However, when the auxiliary pad is stacked on the use surface of the product paper diaper body when worn, the thickness of the absorbent body of the auxiliary pad to be added may be added, and the absorbent body of the auxiliary pad may be doubled with respect to the absorbent body of the paper diaper body. It has been found that, due to the increase in rigidity as a whole, free deformation of the barrier cuff is inhibited, and no matter how large the standing width of the barrier cuff is, it does not adhere well to the skin and does not perform its function sufficiently.
However, it is assumed that adhesion to the skin will be ensured by increasing the elastic force of the gather, but the shrinkage force more than necessary will cause the wearer to feel a sense of pressure, and the wearing feeling will be significantly inferior. There's a problem.

  Therefore, an object of the present invention is to provide a disposable absorbent article that has a high side leakage prevention effect and is excellent in wearing feeling, whether used alone or in an overlapping manner.

The present invention that has solved the above problems is as follows.
On both sides, in disposable absorbent articles each having a barrier cuff for around legs freely standing in the use surface side in use state,
The barrier cuff is fixed to the side of the disposable absorbent article over the entire length in the width direction, and the inside in the width direction from the fixing start end of the fixing portion is an upright region. Both ends in the longitudinal direction are fixed to the use surface side of the product, and both ends in the longitudinal direction are not fixed to the product body,
The length in the product width direction of the standing region of the barrier cuff is 10 mm or more,
When the sticking start end is a standing proximal edge, and the free end inside the standing region in the width direction is a standing distal edge,
In the fixing of the both ends in the longitudinal direction of the standing region, at least on the ventral side, the fixing start position on the standing distal edge side is displaced from the fixing start position on the standing proximal edge side toward the end edge side in the longitudinal direction of the product. And
An elastic elastic member for contact is fixed under extension along the longitudinal direction of the product in the vicinity of the standing distal edge between both longitudinal ends in the standing region of the barrier cuff, and the length in the standing region of the barrier cuff is The elastic elastic member for standing is fixed under extension along the longitudinal direction of the product on the side near the standing proximal edge between both ends in the direction,
The effective elastic length of the standing elastic elastic member is shorter than the effective elastic length of the elastic elastic member for contact,
A disposable absorbent article characterized by that.

  According to the present invention, whether it is used alone or used with overlapping auxiliary pads, the effect of preventing side leakage is high, and the wearing feeling is excellent.

  Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings. The disposable absorbent article of the present invention can be applied to napkins and the like in addition to disposable diapers. In particular, since it is clear that the present invention can also be applied to a pants-type paper diaper, only the tape-type disposable pad-type disposable diaper for adults in particular will be described below. Omitted.

  In the disposable diaper shown in FIG. 1 and FIG. 2, a liquid-permeable surface sheet 1 having a shape such as a rectangle made of a nonwoven fabric or a porous film, a polyethylene or polylaminated nonwoven fabric, a microvoid is formed, and vapor is transmitted but liquid is not transmitted. Between the hourglass-shaped liquid-impervious back sheet 2 made of the above, an absorbent body 3 made of cotton-like pulp or the like and having a certain degree of rigidity such as a rectangular shape or an hourglass shape is interposed. A polymer-absorbing polymer can be added to the absorber 3. The absorbent body 3 can be covered with upper and lower tissue papers 3A and 3B for absorption, and constitutes an absorbent element.

  The liquid-permeable top sheet 1 has a rectangular shape wider than the absorbent element, extends slightly outward from the side edge of the absorbent element, and is fixed to the liquid-impervious back sheet 2 by a hot melt adhesive or the like (this (In the cross section including the fixing portion, the fixing portion is indicated by *).

  On both sides of the paper diaper, there are formed leg cuffs B for leg surroundings that protrude freely on the use surface side, and the barrier cuffs B are substantially continuous with the barrier sheet 4 in the width direction, and an appropriate number of implementations. In the embodiment, two elastic elastic members for contact (elastic elastic members near the distal edge) 5A, 5A, and in an appropriate number of embodiments, three elastic elastic members for standing up (elastic elastic members near the proximal edge) 5B, 5B, 5B. These elastic elastic members can be made of, for example, thread rubber or belt rubber. Reference numeral 6 denotes a back-side leakage prevention flap, which includes a contact elastic expansion / contraction member 7A at the distal edge and a pressing elastic expansion / contraction member 7B at the base of the free portion. 8 is a fastening tape.

  Further, the barrier cuff B is formed by double folding the barrier sheet 4 by shortening the inner surface side inwardly, and forming the elastic elastic members 5A and 5A for contact and the elastic elastic members 5B, 5B and 5B for standing. Wrapped in a hot-melt adhesive. In the embodiment, the fold line constitutes the distal edge E1.

  The outer part in the width direction of the inner layer of the double barrier sheet 4 is fixed to the surface of the liquid-impervious back sheet 2 with the sticking start edge at the end of the liquid-permeable surface sheet 1, and the outer part of the outer layer of the barrier sheet 4 is also the same. Each is fixed to the surface of the liquid-permeable back sheet 2 with a hot melt adhesive or the like.

  As a result, the starting edge of the inner layer of the double barrier sheet 4 to the liquid-permeable surface sheet 1 forms the proximal edge E2 of the barrier cuff B. Around the leg, the inner side of the proximal edge E2 is a free-standing standing area Z that is not fixed to the product body.

  The length L in the product width direction of the standing region Z around the leg of the barrier cuff B is preferably 10 mm or more, particularly 30 to 80 mm in the case of a paper diaper.

  On the other hand, as shown in FIG. 1, when attention is paid to the fixing relationship between the barrier sheet 4 and the product excluding the barrier sheet 4 at the end in the longitudinal direction, both ends in the longitudinal direction of the barrier sheet 4 in the standing region Z are on the use surface side of the product. Specifically, in the embodiment, the back side is fixed on the back side leakage preventing flap 6 and the liquid-permeable surface sheet 1 by a hot melt adhesive, and the abdomen side is not provided with a flap. It is directly fixed on the liquid surface sheet 1 by a hot melt adhesive.

  In particular, as shown in FIG. 1, the fixing point F of the hot melt adhesive is indicated by a halftone dot, and on the abdominal side, the fixing start position f1 of the barrier sheet 4 on the standing distal edge E1 side is on the standing proximal edge E2 side. It deviates from the fixing start position f2 toward the end edge in the longitudinal direction of the product. The fixing start position f3 of the barrier sheet 4 on the back side is parallel to the edge in the longitudinal direction of the product and is not displaced.

  Under such a relationship, the elastic contact members 5A and 5A are disposed in the vicinity of the standing distal edge E1 of the barrier cuff B, and the elastic stretching member for standing is disposed in the vicinity of the standing proximal edge E2 in the standing region Z of the barrier cuff B. Members 5B, 5B, 5B are arranged.

  For the elastic elastic members 5A and 5A for contact, the length portion between f1 and f3 is contracted, and for the elastic elastic members 5B, 5B and 5B for standing up, the length portion between f2 and f3 is contracted. Further, it is fixed to the barrier sheet 4 with a hot melt adhesive under elongation. Therefore, the effective elastic length of the standing elastic elastic members 5B, 5B, and 5B is shorter than the effective elastic length of the contact elastic elastic members 5A and 5A.

  The upper stage of FIG. 2 is a state in which the paper diaper is elongated in the longitudinal direction. However, as shown in the lower stage of FIG. 2, the paper diaper is attached to the body in a boat shape in the front-rear direction. 5A,... And 5B... Acts, so that the front and rear ends of the product retain the same form as the upper stage of FIG. 2 and the elastic force members 5A,. Barrier cuffs B stand up.

  At this time, the side flap portion is deformed and lifted, and the absorber 3 is also lifted while being slightly deformed to form a deep pocket space.

  In addition, in this lifted state, the strong contraction force of the elastic elastic members 5B, 5B, 5B for standing acts on the barrier cuff B itself, so that the barrier cuff B acts so as to stand almost vertically. At the same time, the barrier elastic cuffs 5A and 5A are weak, but the barrier cuffs B are raised by the contraction force. However, even if the contracting force of the elastic elastic members 5A and 5A for contact is weak, the rising force of the barrier cuff B by the elastic elastic members 5B, 5B and 5B for standing is large, so that the barrier cuff B is reliably secured as a whole. Is done. And since the contractive force of the elastic elastic members 5A, 5A for contact is not strong, there is no excessive pressure contact with the wearer's skin.

  Further, FIG. 5 supplementarily explains the standing manner of the barrier cuff. The elastic elastic members 5A and 5A for contact use have a long effective extension length and their contraction force is weak, whereas the elastic elastic members for standing use. Since the effective extension length of 5B, 5B, and 5B is short and the contraction force is strong, the contraction force toward the longitudinal center is larger at the proximal edge side than at the distal edge side. When the part is viewed from the side, as shown in FIG. As a result, when the wearer wears, the front and rear sides are weak at the distal edge and the center side is relatively strong and contacts the leg, as shown in Fig. B. On the other hand, the front and rear sides are small at the distal edge and the center side is relatively large. And since it contacts the circumference | surroundings of a leg, it can respond appropriately that it is easy to produce a liquid leak especially from the center side of a distal edge.

  According to the embodiment of the present invention, since the rising of the barrier cuff B is reliably ensured, as shown in FIG. 6, even if the auxiliary pad 10 is disposed on the use surface side, the rising of the barrier cuff B is ensured. Thus, the auxiliary pad 10 can be reliably wrapped without sleeping or warping.

  On the other hand, as shown in FIG. 1, the fixing portion F of the hot melt adhesive is indicated by a halftone dot, and the fixing manner of the end portion of the barrier cuff B is devised on the ventral side. That is, as shown in FIG. 4, the 4A portion on the end side is a longitudinal end portion, so that the standing height of the distal edge of the barrier cuff B is small, and the base portion of the barrier cuff B is constrained by the presence of the fixing portion F. Has been. On the other hand, since the fixed portion F does not exist in the central portion 4B, the barrier cuff B tends to rise with the standing elastic elastic members 5B, 5B, 5B. However, since the standing height of the distal edge of the barrier cuff B is small at the end side 4A portion, it acts to press against the distal edge of the barrier cuff B at the central side 4B. As shown in the lower part of FIG. 4, the barrier cuff B comes to stand while inflating its intermediate portion in the height direction outward. Thereby, the pocket of the barrier cuff B is formed, and the auxiliary pad 10 can be securely wrapped.

By the way, as a material for the barrier sheet, a breathable and liquid-impermeable plastic film, a water-repellent nonwoven fabric by silicon treatment, or the like can be used. Moreover, as shown in FIG. 7, in order to prevent permeation | transmission of a liquid reliably, it is good to interpose the waterproof sheet 7C which consists of a plastic film etc. in the water-repellent nonwoven fabric or the nonwoven fabric which does not have water repellency. As a preferable non-woven fabric, a polypropylene non-woven fabric manufactured by a melt blown method is more suitable. A sheet having a thickness of 5 to 30 g / m ² as a basis weight is adhered to a bag-bound form, and a bag-like edge is used as a free end. As the elastic member, a plurality of filamentous bodies made of natural rubber, synthetic rubber, polyurethane, or the like, or a strip-shaped body can be used. In the embodiment, since the strong contraction force of 5B and 5B acts on the barrier cuff B itself, the barrier cuff B acts so as to stand substantially vertically. At the same time, two 560 denier urethane yarns are stretched over 650 mm in the lengthwise direction as 280% stretched elastic contact members 5A for contact, and three 560 denier urethane yarns are spaced approximately 5mm apart as standing elastic stretch members 5B. And 280% stretched over a length direction of 420 mm.

  When the tape-type diaper is mounted, the elongation rate of the elastic elastic member for contact 5A and the elastic elastic member for standing 5B in the barrier cuff B varies by 60 to 150%. The elongation stress at that time is that of the elastic elastic member for contact 5A. If the elastic elastic member 5B for standing is 0.39 to 1.50N, preferably 0.49 to 1.38N, the wearer feels a feeling of pressure. In addition, no gap is formed around the leg, and excellent leakage prevention performance can be exhibited. In the above-described embodiment, the stress at the stretch rate of 60 to 150% of the elastic elastic member 5A for contact is 0.39 to 0.90 N, and the stress at the stretch rate of 60 to 150% of the elastic stretch member 5B for standing is 0. .49 to 1.38N.

  Since the present invention also includes sanitary napkins having barrier cuffs and the like, considering these, stress at a stretch rate of 60 to 150% (per 15 mm width and 100 mm length) of the portion where the elastic elastic member for contact is disposed. ) Is 0.10 to 1.30 N, and the stress (width 15 mm, per length 100 mm) at the stretch rate of 60 to 150% of the portion where the elastic elastic member for standing is arranged is 0.20 to 2.00 N It is desirable.

  In the above embodiment, the leakage prevention flap 6 is provided only on the back side, but it can be provided on the abdomen side, and can be omitted. Further, if necessary, a gasket cuff can be formed by providing an elastic elastic member along the longitudinal direction in the side flap portion on the outer side in the width direction from the barrier cuff B.

It is a partially broken top view of a disposable paper diaper. It is a 2-2 arrow line view. It is a 3-3 arrow line view. It is a 4A-4A and 4B-4B arrow directional view. It is explanatory drawing of the standing state of a barrier cuff. It is a cross-sectional view of the arrangement | positioning form of an auxiliary pad. It is a cross-sectional view of other embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Liquid-permeable surface sheet, 2 ... Liquid-impermeable back sheet, 3 ... Absorber, 4 ... Barrier sheet, 5A ... Elastic elastic member for contact, 5B ... Elastic elastic member for standing, 6 ... For back side leak prevention Flap, 8 ... Fastening tape, B ... Barrier cuff, E1 ... Distal edge, E2 ... Proximal edge, F ... Fixing site, Z ... Standing region, f1, f2, f3 ... Fixing start position.

Claims (1)

On both sides, in disposable absorbent articles each having a barrier cuff for around legs freely standing in the use surface side in use state,
The barrier cuff is fixed to the side of the disposable absorbent article over the entire length in the width direction, and the inside in the width direction from the fixing start end of the fixing portion is an upright region. Both ends in the longitudinal direction are fixed to the use surface side of the product, and both ends in the longitudinal direction are not fixed to the product body,
The length in the product width direction of the standing region of the barrier cuff is 10 mm or more,
When the sticking start end is a standing proximal edge, and the free end inside the standing region in the width direction is a standing distal edge,
In the fixing of the both ends in the longitudinal direction of the standing region, at least on the ventral side, the fixing start position on the standing distal edge side is displaced from the fixing start position on the standing proximal edge side toward the end edge side in the longitudinal direction of the product. And
An elastic elastic member for contact is fixed under extension along the longitudinal direction of the product in the vicinity of the standing distal edge between both longitudinal ends in the standing region of the barrier cuff, and the length in the standing region of the barrier cuff is The elastic elastic member for standing is fixed under extension along the longitudinal direction of the product on the side near the standing proximal edge between both ends in the direction,
The effective elastic length of the standing elastic elastic member is shorter than the effective elastic length of the elastic elastic member for contact,
A disposable absorbent article characterized by that.

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