JPS6031718Y2 - absorbent articles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to absorbent articles, particularly to sanitary napkins.

The absorbent article includes an absorbent layer, a liquid-permeable sheet provided on the upper surface (use surface side) of the absorbent layer, and a leak-proof sheet provided on the lower surface.

In recent years, napkins have been reported in which a part of the long side of the absorbent layer is cut out in a concave shape in order to easily fit the napkin in close contact with the crotch and to prevent the flow of menstrual blood.

Japanese Unexamined Patent Publication No. 55-52758 discloses a method in which the back and side surfaces of an absorbent layer having a notched recess are covered with a leak-proof layer (leak-proof sheet), and the non-edge portions of the leak-proof layer are fixed onto a nonwoven fabric. A sanitary napkin is disclosed in which subdivisions are left on the upper surface of the non-woven fabric from the point where the leak-proof layer is fixed to the hem.

However, although the leak-proof layer is rolled up to the sides, the edge part that covers the top surface of the napkin is not fixed to the top surface of the napkin, so if the napkin is deformed during actual use (especially the sides of the napkin may be crushed). Cheap)
However, there was a drawback that the napkin did not cover the surface of the napkin properly and folded to the outside of the napkin, resulting in poor side leakage prevention effect.

Japanese Utility Model Application No. 56-161520'A discloses a method in which an absorbent layer with a recess formed in a part of the central part of the long side is sandwiched between a nonwoven fabric and a leakage prevention layer, and the overlapping parts of the nonwoven fabric and the leakage prevention layer are bonded. , discloses a napkin in which a fixed absorbent layer has a pleated portion formed on the outside of the long side.

However, in this type of napkin, the leak-proof layer does not completely cover even the sides of the absorbent layer, so there is a problem in that side leakage of menstrual blood cannot be prevented.

The present invention was made with the aim of solving the above-mentioned drawbacks of the prior art, and provides an absorbent article that is a napkin using an absorbent layer having recesses and can effectively prevent side leakage. The purpose is to

That is, in the absorbent article of the present invention, the upper edge, side surface, and lower surface of the absorbent layer in which a part of the long side is cut out in a concave shape are covered with a leak-proof sheet, and at least the upper surface of the absorbent layer is covered with a leak-proof sheet. The portion excluding the edge is covered with a liquid permeable sheet, and
It is characterized in that the overlapping leak proof sheets are fixed to each other in the concave notch.

FIG. 1 is a partially cutaway plan view of the present invention, and FIGS. 2 and 3 are cross-sectional views taken along lines 1--2 and 2--2 in FIG. 1, respectively.

The absorbent layer 11 has a recess 11a on its long side, and its lower surface, side surface, and upper surface edge (including the edge at the notch 11a) are covered with a leak-proof sheet 13, and the entire surface is covered with a leak-proof sheet 13. It is covered with a liquid permeable sheet 15.

The leak-proof sheet 13 is fixed at the notch part of the adsorption layer 11, and has a fixed part 17 (indicated by a broken line in the figure).

) is formed. Note that normally, liquid permeable sheet 1
5 is also fixed together with the leak proof sheet 13.

The leak proof sheet 13 overlaps at the cutout part of the absorbent layer 11,
By being fixed at this overlapping part (especially the second
(see figure), it is possible to effectively prevent the leak-proof sheet 13 from falling off (separation of the leak-proof sheet 13 from the upper edge of the absorbent layer 11) at this notch, and prevent menstrual blood from leaking sideways.

Furthermore, a heat-fusible material is used as the leak-proof sheet 13,
If the leak-proof sheet 13 is fixed in the notch by heat sealing, it is easy to manufacture, and it does not harden as in the case of using adhesive, so there is no discomfort on the skin. In this example, the entire absorbent layer is covered with a liquid-permeable sheet, but it is not necessary to do so. All you have to do is cover the parts except for both edges covered with.

If desired, the leak-proof sheet 13 and the liquid-permeable sheet 15 are fixed at other portions other than the cutout portions, for example, at the edges 12 in the longitudinal direction, in order to maintain the strength of the absorbent article.

FIG. 4 is a partially enlarged view showing another example of the leak-proof sheet and the liquid-permeable sheet in the notch part of the absorbent layer,
At the notch portion, both sheets are cut leaving a fixed portion.

The gist of the present invention is to cover the absorbent layer with a notch from the side to the top edge with a leak-proof sheet, and to secure the absorbent layer at the notch. There is no particular question regarding the relationship with the sex sheet.

That is, as shown in Figures 1 to 3, a leak-proof sheet and a liquid-permeable sheet may be individually wrapped, or a composite sheet in which a leak-proof sheet and a liquid-permeable sheet are integrated is prepared in advance. However, the absorbent layer may be encapsulated thereby.

If a composite sheet is used, it is possible to save materials and reduce the number of steps, and it is also possible to more reliably prevent misalignment of the leak-proof sheet, such as shoulder-dropping, and to obtain a more complete lateral leakage prevention effect.

FIG. 5 is a plan view showing a configuration example of the composite sheet 18, and FIG. 6 is a cross-sectional view thereof, in which a leak-proofing material 21 is laminated on one side of the liquid-permeable sheet material 19.

The laminated portion 23 functions as a leak-proof sheet, and the non-laminated portion 25 functions as a liquid-permeable sheet.

Therefore, the leakage preventive material 21 is laminated so as to cover the lower surface, both sides, and both edges of the upper surface of the absorbent layer, leaving at least a portion of the upper surface.

FIG. 7 is a cross-sectional view at the notch when the absorbent layer 11 is covered with this composite sheet 18 (the second section in the first embodiment).
(equivalent to the figure).

In this figure, the composite sheet is represented by a line and the laminated part is represented by a dotted line for drawing purposes.

The composite sheet 18 is attached to the absorbent layer 1 with the leak preventer 21 side facing the inner surface.
The part of the composite sheet 18 that is laminated with the leakage preventive material 21 (laminate part 23) covers the lower surface, end surface, and both edges of the upper surface of the absorbent layer 11, and the non-laminated part 2
5 covers the upper surface of the absorbent layer 11, and is further wound to form the absorbent layer 1.
It has reached the bottom side of 1.

Of course, the non-laminated portion 25 only needs to cover at least the portion of the upper surface of the absorbent layer 11 that is not covered by the laminated portion 23, and does not necessarily need to be wound.

Other points such as forming the fixing part 17 in the notch are the same as in the first embodiment shown in FIGS. 1-3.

FIG. 8 is a plan view showing an example of the structure of another composite sheet 18';
FIG. 9 is a cross-sectional view of the liquid-permeable sheet material, in which both sides are laminated with a leak-proof material 23', leaving a non-laminated part 25' having a width narrower than the width of the absorbent layer to be covered. It consists of 19'.

Then, the laminate part 23' acts as a leak-proof sheet,
The non-laminated portion 25' functions as a liquid permeable sheet.

FIG. 10 is a sectional view (corresponding to FIG. 2 in the first embodiment) at the notch when the absorbent layer 11 is covered with this composite sheet 18'.

In this figure, the composite sheet is represented by a line and the laminated part is represented by a dotted line for drawing purposes.

The composite sheet 18' covers the absorbent layer 11 with the leakage preventive material 21' side facing the inner surface, and a non-laminated part 25 is formed on the upper surface of the absorbent layer 11.
' are in contact with each other, and both line parts on the upper surface are in contact with the laminate part 23.
′.

Then, the composite sheets 18' are fixed to each other at the overlapping portion 27 of the composite sheets 18'.

Other points such as forming the fixing part 17 in the notch are the same as in the first embodiment shown in FIGS. 1-3.

In addition, in the above embodiment, as shown in FIG. 8, the case is shown in which a composite sheet is used in which the non-laminated portion is located approximately in the center, but it is also possible to use a composite sheet in which the non-laminated portion is offset from the center. Good too.

In this case, the overlapping portion of the composite sheet, ie, the fixed portion, is only slightly moved from approximately the center of the lower surface of the absorbent layer.

It is preferable to set the non-laminated part and the laminated part so that the fixed part is located on the lower surface of the absorbent layer.

In addition, in the above two examples, the composite sheet was encapsulated with the leak-proof material side facing inside, but it may also be wrapped in the opposite manner, that is, with the leak-proof material exposed on the outside. good.

As the absorbent layer, absorbent paper, cotton pipe, rayon cotton, polymeric absorbent material, etc. are used alone or in combination.

Although rayon paper or the like can be used as the liquid-permeable sheet or liquid-permeable sheet material, nonwoven fabric is particularly preferred.

The nonwoven fabric is preferably made of heat-fusible fibers, and specific examples thereof include nonwoven fabrics made of a mixture of polyolefin fibers and rayon fibers, or a nonwoven fabric made of either one of them alone.

As the leak-proof sheet or material, synthetic resins such as polyethylene and polyvinyl alcohol are generally used, and polyethylene is preferred.

The absorbent article of the present invention uses an absorbent layer with cutouts, can effectively prevent side leakage of menstrual blood, etc., and can be produced using the same system as conventional square and round napkins. Since it is possible, there is a large cost advantage.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view showing an embodiment of the present invention, and FIGS. 2 and 3 are lines ■-n and ■- in FIG. 1.
It is a cross-sectional view along ■. FIG. 4 is a partially enlarged view of the vicinity of the cutout portion of the absorbent layer. 5 and 8 are plan views showing structural examples of the composite sheet used in the present invention, and FIGS. 6 and 9 are respective sectional views. FIG. 7 and FIG. 10 are sectional views showing other embodiments of the absorbent article of the present invention, respectively. 11... Absorption layer, 11a... Notch, 13
...Leak proof sheet, 15...Liquid permeable sheet, 17...Fixed part, 19.19'...
...Liquid permeable sheet material, 18.18'...Composite material, 21.21'...Leak preventive material, 23.23
'... Laminate part, 25, 25'...
・Non-laminated part.

Claims (1)

[Scope of utility model registration request] The upper surface edge, side surface, and lower surface of the absorbent layer with a part of the long side cut out in a concave shape are covered with a leak-proof sheet, and at least the portion of the upper surface of the absorbent layer other than the edge is liquid permeable. An absorbent article characterized in that the leak-proof sheets are covered with a sheet and are fixed to each other in the concave cutout portion, the sheets overlapping each other in the concave notch.