JPH029787Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to sanitary napkins.

(Prior Art) In general, properties required of sanitary napkins include compatibility with the body, leakage prevention ability, and the like.
As a proposal for improving these properties, for example, the invention described in JP-A-53-42489 can be mentioned. According to this invention, the absorbent body is provided with a plurality of folding lines, and by folding along the folding lines, a three-dimensional structure can be formed, thereby improving the fit to the body, Leakage prevention is ensured. Another attempt to improve adhesion to the body and prevent side leakage is the invention described in Japanese Patent Publication No. 10222/1983.
This invention aims to provide a concave portion by notching both sides of the absorbent layer at the center of its long side to improve the fit to the crotch area, and also to form a leak-proof wall in the concave portion to prevent leakage. .

(Problems to be solved by the invention) However, the former proposal has the following problems.

When a product is manufactured by folding and fixing the product into a three-dimensional structure, it is difficult to align and package the product during the manufacturing process, and the product is bulky, resulting in high transportation costs.

If the product is to be made into a product with only fold lines formed and in a flat state or in a folded state but not fixed, it is necessary to fold the product into a three-dimensional structure before use, which is cumbersome. Also,
There is a problem in that it is easy to disassemble before installation.

In products that have a folding structure with straight folding lines, the areas where the folding lines are concentrated become hard, giving the product a foreign body feel.

In terms of appearance, the protrusion at the common point of the folds is easily noticeable and gives an unnatural feeling.

On the other hand, according to the latter attempt, although the fit to the groin area is improved to some extent, the absorption capacity of the notch is reduced, and despite the existence of the leakage barrier,
When a large amount of menstrual blood is discharged at once, leakage is likely to occur.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a liquid-permeable top sheet, a liquid-impermeable back leak-proof sheet, and a liquid-permeable back sheet interposed between the two sheets. In a substantially elongated sanitary napkin composed of an absorbent body, at least a fold line protruding toward the longitudinal end side is formed on the absorbent body at a position closer to the end of the sanitary napkin than the longitudinal center of the sanitary napkin. The absorbent material is formed so as to extend in the width direction of the napkin, and the absorbent material is covered with the back leak-proof sheet so as to extend from the back side of the absorbent material, go around both sides in the longitudinal direction, and then fold back onto the top sheet on the front side of the absorbent material. and forming a barrier flap portion that is not fixed to the top sheet inside the longitudinal center portion of the folded portion on the top sheet;
When worn, the longitudinal center portion of the napkin bulges out in the cross-sectional direction via the fold line, and
The napkin is characterized in that both ends in the longitudinal direction are erected toward the wearer.

(Function) As described above, by forming fold lines protruding toward both ends at positions closer to both ends than the longitudinal center of the absorbent body, napkin When the napkin is worn on the groin area, when both long sides of the napkin are squeezed between the thighs and compressed, the absorbent body breaks at the fold line, causing the ends of the napkin to break, as shown in Figure 1. is lifted toward the wearing surface (the surface that contacts the skin), and the central portion defined by the fold line bulges out toward the wearing surface in a chevron-shaped cross section, improving its fit to the body. Further, when wearing the napkin, by holding both long sides of the napkin between hands, a three-dimensional structure that easily fits the body can be easily formed, and the napkin can be easily worn. In addition, by leaving the longitudinal center portion of the leak-proof sheet rolled up in the form of a top sheet free, the free portion acts as a barrier flap and stands up to form a bag-like portion in the bulging state when installed. Leakage in the lateral direction can be more reliably prevented.

Furthermore, even if a barrier flap is simply formed,
Unless the napkin as a whole is deformed, the barrier flap section is unlikely to actually stand up; however, according to the present invention, the barrier flap section is reliably erected by deforming the central portion of the napkin.

(Example) Figures 1 to 5 show a sanitary napkin according to an embodiment of the present invention, in which Figure 1 is a perspective view showing its use, Figure 2 is a plan view, and Figure 3 is a - line sectional view in Figure 2, Figure 4 is a - line sectional view in Figure 1.
The line sectional view and FIG. 5 are back views of the sanitary napkin.

As shown in the above drawings, the sanitary napkin 1 according to the present invention basically includes an absorbent material 2 formed in a generally elongated shape, and a liquid-permeable surface covering at least the surface side of the absorbent material 2. From the back side of the sheet 3 and the absorbent material 2, go around both long sides of the absorbent material 2.
It consists of a liquid-impermeable back leak-proof sheet 4 rolled up on a front liquid-permeable sheet 3.
The leak-proof sheet 4 covers both sides of the absorbent material 2 from the back surface, and is overlaid on the liquid-permeable sheet 3 so that its side edge lines 4a, 4a are located slightly inside the long side edges of the absorbent material 2. It will be done.

In the basic configuration as described above, according to the present invention, the fold line 5 is formed at least on the absorbent body 2 at a position near the end in the longitudinal direction. The fold line 5 is formed in a shape that projects toward the front end and/or the rear end of the absorbent core 2, and extends in the width direction of the absorbent core 2, as shown in FIGS. 6 to 9, for example.
The fold line 5 may be formed in a curved line as shown in FIGS. 7 and 9, or may be formed in a straight line as shown in FIGS. 6 and 8. As a method for forming the fold line 5, for example, the absorbent body can be formed by a linear pressure line by passing the absorbent body between pressure rolls having protrusions of a predetermined shape on the surface. The folding line 5 does not necessarily have to be formed by one continuous line, and may be any line that can form a continuous folding line as a result.

The formation position of the folding line 5 is preferably a position shifted outward in the longitudinal direction from the longitudinal center of the absorbent body 2, and preferably, the protruding tip 5a of the folding line 5 divides the absorbent body 2 into three equal parts in the longitudinal direction. It is formed so as to be in each front and rear end side region. Protruding portion 5a of fold line 5 in the central region
If this occurs, a desirable three-dimensional shape cannot be obtained during use.

Fold line 5 formed on the sanitary napkin of the present invention
As mentioned above, the shape of the napkin is open to the center in the longitudinal direction and protrudes toward the ends in the longitudinal direction, and when the both sides of the napkin are pinched and compressed during use, Both end portions 2a, 2
a is made to stand up toward the body, and the central portion 2b is shaped so as to bulge out toward the body in a chevron-shaped cross section.

As the absorbent layer 2 used in the present invention, cotton-like pulp, water-absorbing paper, rayon cotton, highly absorbent polymeric absorbent material, etc. are used singly or in a stacked manner.

As the liquid-permeable top sheet 3, a wet-laid nonwoven fabric or a dry-laid nonwoven fabric is used, and these nonwoven fabrics are formed to have a thin and planar structure.

As a liquid-impermeable sheet for leak-proof sheet 4,
Polyethylene film, polyvinyl alcohol film, polyethylene laminate paper, water-repellent waterproof paper, polyethylene laminate nonwoven fabric, etc. are used.

In the sanitary napkin 1 according to the present invention, the leak-proof sheet 4 rolled up on the liquid-permeable sheet 3 on the surface side of the absorbent body 2 is a leak-proof sheet in the portions 2a, 2a closer to the end than the fold line 5. 4. Along the entire surface or the leak-proof sheet side edge 4a, at the central portion b defined by the fold line 5, the napkin is seal-jointed S with the liquid-permeable sheet 3 along the longitudinal side edges 4a, 4a, The folded part is considered free. In this case, the suction plate that has flowed laterally along the liquid-permeable sheet 3 disposed on the absorber is connected to the seal joint S and the side edge 4a as shown in FIGS. 1 and 4 during use.
Since the barrier flap part 4b between the bag-like barrier flap part 4b and the bag-shaped barrier flap part 4b stands up,
is prevented from flowing in the longitudinal direction of the napkin along this barrier flap portion 4b.

In addition, as shown in FIG.
A fastening part 7 made of adhesive is provided on the outer surface of the napkin at a position near the front and/or rear end of the napkin to prevent the napkin from shifting in position. The adhesive is applied, for example, in the form of a double-sided adhesive tape.

(Effect of the invention) As described above, according to the invention, folding lines protruding toward the longitudinal ends of the napkin are formed at the front and rear positions of the absorbent body. It is easy to form a three-dimensional structure that fits well to the body, and when in use, the napkin is held between the thighs, so the ends of the napkin are lifted up from the fold line toward the wearing side, and the center part is A desirable three-dimensional structure that bulges toward the mounting surface is naturally formed and maintained. In this way, conformity to the body is improved and side leak prevention effects are achieved. Moreover, since the barrier flap part stands up reliably when worn, the effect of preventing side leakage of menstrual blood is further enhanced.

[Brief explanation of the drawing]

1 to 5 show a sanitary napkin according to an embodiment of the present invention, FIG. 1 is a perspective view showing its use, FIG. 2 is a plan view, and FIG. Line sectional view, Figure 4 is - in Figure 1.
Line sectional view, Figure 5 is the back view of the sanitary napkin,
FIGS. 6 to 9 are explanatory plan views showing examples of other fold line shapes formed on the absorbent body. 1... Sanitary napkin, 2... Absorbent material, 3...
Liquid permeable sheet, 4... Leak proof sheet, 4b... Barrier flap part, 5... Folding line, 7... Fastening part.

Claims (1)

[Scope of utility model registration request] A substantially elongated sanitary napkin composed of a liquid-permeable top sheet, a liquid-impermeable back leak-proof sheet, and an absorbent body interposed between both sheets, A folding line protruding toward the end in the longitudinal direction is formed on at least the absorbent body at a position closer to the end than the center in the direction, and a fold line extending in the width direction of the napkin is formed, and the back leak-proof sheet is Cover the absorbent material by wrapping it around both sides in the longitudinal direction from the back side of the absorbent material and folding it back onto the top sheet on the front side of the absorbent material. A barrier flap portion is formed, and when the napkin is worn, the longitudinal center portion of the napkin is bulged out in the cross-sectional direction through the fold line, and both longitudinal ends of the napkin are erected toward the wearer. A sanitary napkin characterized by: