JP4502868B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article such as a sanitary napkin, a panty liner (cage sheet), and an incontinence pad.

Conventionally, in a sanitary napkin provided with a pair of wings, a technique is known in which the wing is formed from a sheet material separate from the napkin body for the purpose of effectively using the material (Patent Documents 1 and 2). .
In the sanitary napkin described in Patent Document 1, the wings are fixedly fixed to the leakproof sheet side of the napkin body. In the sanitary napkin described in Patent Document 2, a bulging portion is formed on a side portion of the napkin body, and wings (both side folded pieces) are fixedly fixed to the surface sheet side of the bulging portion.

JP-A-7-163620 Japanese Patent Laid-Open No. 7-112008

However, in the sanitary napkin described in Patent Document 1, since the wing is fixed to the leakproof sheet side of the napkin body, the wing cannot be placed on the underwear unless the wing is once spread, and the sanitary napkin is individually packaged. Wing operability (such as wrapping around the crotch portion of the underwear) after removal from the material is poor.
Further, in the sanitary napkin described in Patent Document 2, since the wing is fixed to the bulging portion separated from the side portion of the absorbent layer, the wing has only a function of fixing the underwear, which is more than the conventional wing. Does not improve leakage.

  Accordingly, an object of the present invention is to provide an absorbent article that is excellent in operability of the wing after being taken out from the individual packaging material and excellent in leakage prevention.

  The present invention is an absorbent article comprising a top sheet, a back sheet, and a vertically long main body having an absorbent layer interposed therebetween, provided with a pair of absorbent article fixing wings and a pair of rear flaps. The pair of wings extends inward in the width direction from both widthwise side portions of the main body on the topsheet side, and the pair of rear flaps are respectively widened from both widthwise side portions of the main body. The above object is achieved by providing an absorbent article extending outward in the direction.

  The absorbent article of the present invention is excellent in operability of the wing after being taken out from the individual wrapping material, is improved in the wearability of the absorbent article, and is excellent in leakage prevention.

Hereinafter, an absorptive article of the present invention is explained based on a desirable embodiment (1st embodiment), referring to drawings.
The sanitary napkin as the first embodiment of the absorbent article of the present invention is a vertically long body having a topsheet 2, a backsheet 3 and an absorbent layer 4 interposed therebetween, as shown in FIGS. 1 is provided.

  A pair of absorbent article fixing wings 6A and 6B and a pair of rear flaps 7A and 7B made of different materials from the top sheet 2 and the back sheet 3 are provided on both sides in the width direction on the top sheet 2 side of the main body 1. It has been. The pair of wings 6 </ b> A and 6 </ b> B extend inward in the width direction from both sides in the width direction on the topsheet 2 side of the main body 1, and the pair of rear flaps 7 </ b> A and 7 </ b> B have a width on the topsheet 2 side in the main body 1. Extending outward in the width direction from both sides in the direction.

The sanitary napkin of this embodiment will be described in further detail.
The main body 1 has a front portion disposed at a position closer to the wearer's abdomen when worn, in order from one end portion (upper side in FIG. 1) to the other end portion (lower side in FIG. 1), and a liquid excretion portion of the wearer. And a rear part arranged at a position near the back of the wearer.

  As shown in FIGS. 4 and 5, the main body 1 has a top sheet 2, an absorption layer 4, and a back sheet 3 laminated in this order, and the top sheet 2 and the back sheet 3 are joined at their peripheral portions. (The junction part of a front edge part and the junction part of a back edge part are shown by "T3" and "T4" in FIG.1 and FIG.3, respectively). Moreover, the surface sheet 2 and the absorption layer 4 are joined by the groove-like joining portion T5.

  The top sheet 2 is a sheet that is directed to the skin side of the wearer when worn, and the back sheet 3 is a sheet that is directed to the underwear side (the side opposite to the wearer's skin side) such as shorts when worn. is there.

  As the surface sheet 2, for example, a liquid-permeable material such as a nonwoven fabric or an apertured film is used. As the back sheet 3, for example, a resin film, a resin film having fine pores, a leakproof material such as a water-repellent nonwoven fabric is used. As the absorbent layer 4, for example, a fiber assembly using pulp or hydrophilic fibers, a nonwoven fabric, paper, or a liquid retaining material in which a superabsorbent polymer is blended with these is used.

  As shown in FIGS. 1 and 4, a pair of wings 6 </ b> A and 6 </ b> B are joined and fixed to both side portions in the width direction on the surface sheet 2 side of the excretory part facing part of the main body 1. The pair of wings 6 </ b> A and 6 </ b> B extend inward in the width direction from both sides in the width direction on the topsheet 2 side of the main body 1.

  As shown in FIGS. 1 and 5, a pair of rear flaps 7 </ b> A and 7 </ b> B are bonded and fixed to both sides in the width direction on the surface sheet 2 side in the rear part of the main body 1. The pair of rear flaps 7 </ b> A and 7 </ b> B extend outward in the width direction from both sides in the width direction on the topsheet 2 side of the main body 1.

  The wings 6A and 6B and the rear flaps 7A and 7B located on the same side in the width direction of the main body 1 are respectively formed from one first sheet material 5A and second sheet material 5B. Specifically, one wing 6A and one rear flap 7A are formed from one first sheet material 5A, and the other wing 6B and the other rear flap 7B are one second sheet material. 5B.

More specifically, in the first sheet material 5A, the extending direction of one wing 6A and the extending direction of one rear flap 7A are opposite in an unfolded state, and the other direction in the second sheet material 5B. The extending direction of the wing 6B and the extending direction of the other rear flap 7B are opposite to each other when not folded. That is, in the first sheet material 5A and the second sheet material 5B, the wings 6A and 6B and the rear flaps 6A and 6B extend inward in the width direction and outward in the width direction, respectively, without being folded back.
The first sheet material 5A and the second sheet material 5B are made of different materials from the top sheet 2 and the back sheet 3, and thus the pair of wings 6A and 6B and the pair of rear flaps 7A and 7B are also composed of the top sheet 2 and the back sheet. The sheet 3 is made of a different material.

As shown in FIGS. 1 and 3, the first sheet material 5 </ b> A and the second sheet material 5 </ b> B are bonded to both side portions in the width direction of the main body 1 on the surface sheet 2 side by bonding portions T <b> 1 and T <b> 2, respectively. The joining portions T1 and T2 further join the top sheet 2 and the back sheet 3 together.
The joint portions T1 and T2 are provided over the entire length in the longitudinal direction along the inner edge of the first sheet material 5A and the second sheet material 5B except for the wings 6A and 6B, outside the width direction of the absorbent layer 4. The wings 6A and 6B are gently curved outward and convex outward in the width direction.

  The joint portions T1 to T5 are formed by pressurization, heat, ultrasonic waves, hot melt adhesive, or the like, or a combination thereof. In this embodiment, it is formed by hot emboss sealing.

  As the first sheet material 5A and the second sheet material 5B that form the wings 6A, 6B and the rear flaps 7A, 7B, for example, the same material as that of the top sheet 2 or the back sheet 3 described above can be used. In addition, when a stretchable material is used, when the rear flaps 7A and 7B are folded inward in the width direction and packaged, the rear flaps 7A and 7B are outward in the width direction after being taken out from the individual packaging material. It is easy to open and preferable. Further, by combining the joints T1 and T2 that are gently curved as described above, the vicinity of the fixed ends 61A and 61B of the wings 6A and 6B folded by the operation of attaching the wings 6A and 6B to the shorts is the side of the main body 1. It becomes easy to stand up, and it becomes possible to enhance the leakage prevention effect.

  In the present invention, “both sides in the width direction of the main body” means a straight line shape or a substantially straight line shape (a shape that is not linear but can be approximated to a straight line shape), and in the main body, the top sheet and / or the back sheet extends in the width direction. When the bulging part is formed by protruding, it means both side parts when the bulging part is removed.

  Further, in the present invention, “the wings and the rear flaps are provided on both sides in the width direction on the surface sheet side of the main body” means that the wings 6A and 6B and the rear flaps 7A and 7B are provided as in this embodiment. Not only the form directly joined to the top sheet 2 (without another member), but also the wings 6A and 6B and the rear flaps 7A and 7B are formed on the top sheet 2 through a member different from the top sheet 2. The form joined is also included.

  When the sanitary napkin is fixed to underwear such as shorts, the wings 6A and 6B are bent to the back sheet 3 side and are adhesively fixed to the non-skin facing surface of the crotch portion of the underwear. As shown in FIGS. 1 and 4, one wing 6 </ b> A and the other wing 6 </ b> B are respectively provided with upper surfaces in a state in which they face inward in the width direction on the surface sheet 2 side (state shown in FIG. 1). One adhesive layer S1, S1 is provided.

  The rear flaps 7 </ b> A and 7 </ b> B are mounted on the skin-facing surface of the underwear in a state where the rear flaps 7 </ b> A and 7 </ b> B are extended outward in the width direction of the rear portion of the main body 1. From the viewpoint of mounting stability, it is preferable to be adhesively fixed, and as shown in FIGS. 1 and 5, one rear flap 7A and the other rear flap 7B are in a state in which they face outward in the width direction ( Second adhesive layers S2 and S2 are provided on the lower surface side (back surface sheet side) in the state shown in FIG.

As shown in FIGS. 3 to 5, two third adhesive layers S <b> 3 and S <b> 3 are provided on the outer surface of the back sheet 3 over substantially the entire length in the longitudinal direction.

An example of the manufacturing method of the sanitary napkin of this embodiment is shown below.
(1) The topsheet 2 and the absorbent layer 4 are laminated, and a joining portion T5 is formed on the two-layer laminate by hot embossing sealing to join the topsheet 2 and the absorbent layer 4 (temporary joining).
(2) Next, the back sheet 3 is joined to the absorption layer 4 side of the two-layer laminate, and the joint portions T3 and T4 are formed on the three-layer laminate by hot embossing sealing, so that the top sheet 2 and the back sheet The sheet 3 is joined.
(3) Next, the first sheet material 5A and the second sheet material 5B are joined to the three-layer laminate, and the joint portions T1 and T2 are formed on the four-layer laminate by hot emboss seal processing. 2 is bonded to the first sheet material 5A and the second sheet material 5B.

(4) The joint portions T3 and T4 may be formed simultaneously with the formation of the joint portions T1 and T2 after the first sheet material 5A and the second sheet material 5B are merged. Moreover, when not forming junction part T5, laminating | stacking the surface sheet 2, the absorption layer 4, and the back surface sheet 3 simultaneously, forming junction part T3, T4, and forming junction part T1, T2 You can also.
(5) The first adhesive layer S1, the second adhesive layer S2, and the third adhesive layer S3 are provided at predetermined positions on the wings 6A, 6B, the rear flaps 7A, 7B, and the back sheet 3, respectively.
(6) The rear flaps 7A and 7B are folded back to the top sheet 2 side (inward in the width direction), and an individual packaging material (not shown) is adhered to the back sheet 3 by the third adhesive layer S3, and in this state, the sanitary A wrapping structure can be formed by folding the entire napkin in two to four in the longitudinal direction.

  In the sanitary napkin of the present embodiment, when the individual wrapping material is removed from the packaged state, the pair of wings 6A and 6B are stably facing inward in the width direction. The first adhesive part S1 is excellent in handleability without being attached to the leg until it is placed on the leg. After the sanitary napkin is placed on the crotch portion of the underwear, the pair of wings 6A and 6B are bent so as to be wound around the crotch portion of the underwear, and the sanitary napkin is attached and fixed to the underwear by the first adhesive portion S1. be able to.

  Further, in the sanitary napkin of the present embodiment, when the individual packaging material is removed from the packaging state, the pair of rear flaps 7A and 7B are respectively outward in the width direction from the width direction both side portions on the surface sheet 2 side in the main body 1. It is easy to be attached to the undergarment because it is likely to extend or to be in an extended state. In addition, the rear part of the sanitary napkin is adhered and fixed on the skin-facing surface of the underwear using the third adhesive layers S3 and S3 of the back sheet 3 and the second adhesive layers S2 and S2 of the rear flaps 7A and 7B. In this case, the wearing state is stabilized, and the leakage prevention property can be further improved.

Furthermore, since the wings 6A and 6B extend inward in the width direction, when the wings 6A and 6B are wound around the underwear, a leak-proof wall is formed in the vicinity of the fixed ends 61A and 61B of the folded wings 6A and 6B.
Further, since the joint portions T1 and T2 are curved outward in the width direction in the wings 6A and 6B, when the user fixes the wings 6A and 6B to the shorts and attaches them, the wings 6A and 6B are curved. It becomes possible to guide to the shape of standing on the side of the main body 1 starting from the joined portions T1 and T2, and pocket portions P (see FIG. 2) are formed in the vicinity of the fixed ends 61A and 61B of the wings 6A and 6B. . As a result, the side leakage prevention performance is improved by the leakage prevention wall and the pocket portion P.
Moreover, since the rear flaps 7A and 7B extend outward in the width direction from the both sides in the width direction of the main body 1, it becomes possible to wrap the user's buttocks and improve the leakage prevention performance.

  Further, since the wings 6A, 6B and the rear flaps 7A, 7B are formed from different materials from the top sheet 2 and the back sheet 3, the wings 6A, 6B and the rear flaps 7A, 7B are separated from the main body 1. Can be formed. Therefore, since the wings 6A and 6B and the rear flaps 7A and 7B may be joined to both sides in the width direction of the main body 1, the manufacturing efficiency is high. In particular, one wing 6A and one rear flap 7A are formed from one first sheet material 5A, and the other wing 6B and the other rear flap 7B are formed from one second sheet material 5B. Therefore, the position (interval) alignment between one wing 6A and one rear flap 7A and the position (interval) alignment between the other wing 6B and the other rear flap 7B are unnecessary.

  Furthermore, for the wings 6A and 6B and the rear flaps 7A and 7B, a material having a desired physical property can be used without considering the top sheet 2 and the back sheet 3, so that the degree of freedom of material selection is high and the optimum. A material having physical properties can be selected.

  Next, another embodiment of the present invention will be described. In the other embodiments, differences from the first embodiment described above will be mainly described, and similar points will be denoted by the same reference numerals and description thereof will be omitted. For the points that are not particularly described, the description of the first embodiment is applied as appropriate.

  In the second embodiment, the first sheet material 5A serving as the skin contact surface of the wings 6A and 6B, the surface of the second sheet material 5B, and the first sheet material 5A serving as the skin contact surface of the rear flaps 7A and 7B, The surface of the second sheet material 5B is different. In the first sheet material 5A and the second sheet material 5B, the wings 6A and 6B and the rear flaps 7A and 7B are not folded back and extend in the same direction, and the wings 7A and 7B are in the width direction. And is joined to the top sheet 2 side of the main body 1.

The sanitary napkin of the second embodiment will be further described by paying attention only to the first sheet material 5A, but the second sheet material 5B is the same as the first sheet material 5A only in left-right symmetry in plan view. The description regarding the first sheet material 5A is also applied to the second sheet material 5B as appropriate.
In the sanitary napkin of the second embodiment, as shown in FIG. 6A, the extending direction of one wing 6A and the extending direction of one rear flap 7A are folded back in the first sheet material 5A. It is the same direction when not. Thus, as shown in FIGS. 6 (b) and 7, the one wing 6A has the first sheet material 5A with the one wing 6A and one rear flap 7A facing outward in the width direction. After being joined to the top sheet 2 side of 1, it is folded and joined inward in the width direction.

  Similarly, in the second sheet material 5B, the extending direction of the other wing 6B and the extending direction of the other rear flap 7B are the same in an unfolded state. Thus, as shown in FIG. 7, the other wing 6B has the top sheet 2 of the main body 1 with the second sheet material 5B facing the other wing 6B and the other rear flap 7B outward in the width direction. After being joined to the side, it is folded and joined inward in the width direction.

  The first sheet material 5A and the second sheet material 5B in the sanitary napkin of the second embodiment, for example, as shown in FIG. 6 (c), the wings 6A, 6B and It is obtained by cutting in a wavy line over the longitudinal direction so that the rear flaps 7A and 7B are formed. By devising the shape, position, etc. of the wings 6A, 6B and the rear flaps 7A, 7B, as shown in FIG. 6 (c), it is possible to prevent any material loss, but when that is not possible After cutting the strip-shaped sheet material Q to obtain the first sheet material 5A and the second sheet material 5B, the wings 6A and 6B and the rear flaps 7A and 7B having the desired shapes and positions are additionally processed. That's fine.

  In the second embodiment, the wings 6A and 6B are joined to the top sheet 2 side of the main body 1 by joining the first sheet material 5A and the second sheet material 5B, respectively, with only the wings 6A and 6B folded in advance. A form folded back inward in the width direction can also be formed.

According to the sanitary napkin of the second embodiment, the first sheet material 5A and the second sheet material 5B can be formed from the belt-like sheet material Q with little or no material loss, so that the wings 6A and 6B can be formed. In addition, the material loss of the rear flaps 7A and 7B can be greatly reduced.
Further, since the fixed ends 61A and 61B of the wings 6A and 6B are folded back inward in the width direction and joined to both sides in the width direction of the main body 1, the main body 1 in the region where the wings 6A and 6B are provided. Since both side portions in the width direction stand slightly toward the surface sheet 2 side, the side leakage prevention performance is further improved.

Next, the sanitary napkin of the third embodiment will be described.
The sanitary napkin of the third embodiment uses the first sheet material 5A and the second sheet material 5B that extend in the same direction with the wings 6A and 6B and the rear flaps 7A and 7B not folded. Then, it is the same as 2nd Embodiment. Thus, in the second embodiment, the wings 6A and 6B are folded back inward in the width direction in the first sheet material 5A and the second sheet material 5B. In the third embodiment, the first sheet material 5A is folded. The second sheet material 5B is different in that the rear flaps 7A and 7B are folded back outward in the width direction.

That is, in the sanitary napkin of the third embodiment, as shown in FIG. 8, one rear flap 7A has a first sheet material 5A with one rear flap 7A and one wing 6A facing inward in the width direction. After being joined to the top sheet 2 side of the main body 1, it is folded and joined outward in the width direction. Further, the other rear flap 7B is joined to the outer side in the width direction after the second sheet material is joined to the top sheet 2 side of the main body 1 with the other rear flap 7B and the other wing 6B facing inward in the width direction. It is folded back and joined.
In the third embodiment, the rear flaps 7A and 7B are joined to the top sheet 2 side of the main body 1 by joining the first sheet material 5A and the second sheet material 5B in a state where only the rear flaps 7A and 7B are folded in advance. It is also possible to form a shape in which 7B is folded outward in the width direction.

  According to the sanitary napkin of 3rd Embodiment, it can manufacture similarly to 2nd Embodiment, and the same effect is acquired.

The absorbent article of the present invention is not limited to the above embodiment, and can be variously modified without departing from the spirit of the present invention.
In addition to sanitary napkins, the absorbent article of the present invention may be other absorbent articles such as a panty liner (cage sheet) and an incontinence pad.
There may not be the 2nd adhesion layer of a rear flap.

  In the wings 6A and 6B, the shapes of the joints T1 and T2 may be linear without being curved. The joint portions T1 and T2 may not have the same width in the longitudinal direction, but may be wider in front and rear than the wing than in the wing. Further, the joint portions T1 and T2 may be plural instead of one.

The material for forming the adhesive layer is preferably a hot melt adhesive or a double-sided tape, but is not limited to a hot melt adhesive or a double-sided tape as long as it has a displacement prevention effect, and a hook material such as a mechanical fastener is used. It may be used.
Moreover, when using a hook material as a 1st adhesion layer in a wing, you may form so that wings may be couple | bonded or fixed to the outer surface side of the crotch part of shorts, and the width direction length of a wing should be made in this case Alternatively, it may be asymmetrical.

FIG. 1 is a plan view showing a sanitary napkin as a first embodiment of the present invention. FIG. 2 is a partial plan view showing a state in which the wing of the sanitary napkin shown in FIG. 1 is folded outward in the width direction. 3 is a bottom view of the sanitary napkin shown in FIG. 4 is a schematic cross-sectional view taken along the line IV-IV shown in FIG. FIG. 5 is a schematic VV cross-sectional view shown in FIG. FIGS. 6A to 6C are schematic views showing a method for forming a wing and a rear flap in the sanitary napkin of the second embodiment. FIG. 7 is a cross-sectional view (corresponding to FIG. 4) in which the sanitary napkin of the second embodiment is cut so as to pass through the wing. FIG. 8 is a cross-sectional view (corresponding to FIG. 5) in which the sanitary napkin of the third embodiment is cut so as to pass through the rear flap.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Top sheet 3 Back sheet 4 Absorbing layer 5A 1st sheet material 5B 2nd sheet material 6A, 6B Wing 7A, 7B Rear flap

Claims (3)

An absorbent article comprising a top sheet, a back sheet, and a vertically long body having an absorbent layer interposed therebetween,
A pair of absorbent article fixing wings and a pair of rear flaps are provided,
The pair of wings extends inward in the width direction from both side portions in the width direction on the surface sheet side of the main body in a state where the wings are not folded back ,
The pair of rear flaps extend outward in the width direction from both sides in the width direction of the main body, in a state where they are not folded back ,
The wing and the rear flap located on the same side in the width direction of the main body are formed from one sheet material,
Each of the sheet materials is bonded by a bonding portion along the width direction side portion of the top sheet,
Each said junction part is provided over the full length direction of the said sheet | seat material, In the said wing, the absorbent article which curves in the convex shape toward the width direction outward . Face and absorbent article according to claim 1, wherein the surface and are different in the sheet material as a skin contact surface of said rear flap of the sheet material as a skin contact surface of the wing. The wing has a first adhesive layer on the upper surface when facing inward in the width direction, and the rear flap has a second adhesive layer on the lower surface when facing outward in the width direction. The absorbent article according to claim 1 or 2.

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