JPS6031719Y2 - sanitary napkin - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sanitary napkin that is primarily characterized by its shape.

The outer surface of the human body cavity is concave, so sanitary napkins that are used in contact with the cavity are thicker (higher) in the central area that contacts the cavity and thinner (lower) in the peripheral area. It is preferable for mounting to be formed to have a small diameter.

For this reason, a so-called medium-height napkin in which the central region of the napkin that contacts the skin is raised has been proposed, but it has not yet been put to practical use.

So far, the proposed napkin has been developed by simply increasing the thickness of the central region on the skin-contacting side of the conventional napkin, or by simply compressing the absorbent material in both widthwise and/or longitudinally end regions. As a result, the napkin is only formed to have a medium-height shape, which has the drawbacks that it feels more comfortable to use than a conventional flat napkin, and it cannot be said that the napkin has improved wearability.

The purpose of the present invention is to provide a napkin that maintains the advantages of conventional napkins, such as a sense of security in use, while also eliminating the disadvantages mentioned above.
To achieve this purpose, the gist of the present invention is to provide a sanitary napkin comprising at least an absorbent body 2, a water-impermeable layer 3 located on the lower surface of the absorbent body 2, and a water-permeable sheet 4 covering these laminates. , the absorber 2 has a front end region 17
, a region 18 from the rear end to approximately the center, these peripheral regions 17,
The central side areas 19 and 19 between these peripheral areas 19 and 18 are
The water-permeable sheet is thinner than the central region 20 that protrudes on the skin contact side between 9 and 9, and the peripheral region 19.19 is the thinnest layer, and the water-permeable sheet 4
The napkin is characterized in that an inner surface of the napkin is integrally adhered to the upper surface of the laminate.

The present invention will be further explained based on the illustrated embodiments as follows.

Figure 1 is a plan view of the napkin, Figure 2 is a side view of the napkin, Figure 3 is a sectional view taken along line X□-X1 in Figure 1, and Figure 4 is a plane of the middle layer of the absorbent body before folding. Figure, Figure 5 is Figure 1 X2
-Xa is a sectional view.

As shown in FIG. 3, the napkin 1 consists of an absorbent body 2, an impermeable layer 3 positioned so as to wrap the lower surface and both widthwise ends of the absorbent body 2, and a laminate that covers these layers and is heat-molded at both longitudinal ends. (Pressure) from the attached water permeable sheet 4.

Furthermore, the absorbent body 2 includes a top layer 5, an upper layer 6, an intermediate layer,
7 and the lower layer 8, and the impermeable layer 3 is separated from the lower layer 8.
The first water-impermeable sheet 9 is located on the lower surface, and the second water-impermeable sheet 10 is located so as to wrap the lower surface of the sheet and both ends of the absorbent core 2 in the width direction.

The uppermost layer 5 is made of pulverized pulp of 30 to 70% in order to provide bulkiness and soft elasticity and absorb menstrual blood in spots.
Weight% and hydrophilic fibers such as rayon, polypropylene,
Hydrophobic fibers such as acetate alone or in combination 7
A mixture of 0 to 3% saliva is used.

The fibers to be combined with the pulverized pulp are preferably hydrophilic, and the fiber length is not particularly limited, but fibers from 3 wIL to 120 to 200 m, which is the length of the absorbent body 2, can be used; When the fibers are relatively short, the fibers are oriented in any direction of the top layer 5, but on the other hand, when the fiber length is relatively long, it is preferable that the fibers are oriented in the longitudinal direction of the top layer 5.

As the upper layer 6, absorbent paper, preferably so-called crepe absorbent paper, is used.

As the intermediate layer 7, a material obtained by covering pulverized pulp 7a with a water-permeable sheet 7b such as tissue paper or nonwoven fabric is used.

As the lower layer 8, the same material as the upper layer 6 is used.

As the water-impermeable sheet 3, a synthetic resin film, a laminate sheet of the film and paper or non-woven fabric, a sheet of paper or non-woven fabric coated with resin, a sheet of paper or non-woven fabric subjected to size treatment, and the resin includes: If necessary, a substance that is insoluble at the temperature of menstrual blood but soluble at the temperature of the water in the toilet bowl may be used.

As the water-permeable sheet 4, a non-woven fabric, preferably one without a fiber binder, particularly one formed by intertwining fibers by high-speed water jetting, is suitably used.

As shown in FIG. 4, the intermediate layer 7 includes slits 12 and 12 on both sides of the front end of a substantially rectangular sheet 11 with diagonally cut corners.
is provided diagonally, and a folded portion 14.14 is formed by providing a slit 13.13 diagonally from the rear end to a portion substantially toward the center, and a folded line 15.15 is formed to connect the inner tips of each slit 12.13. As shown in FIG. It is polymerized on 8.

The upper layer 6 is superposed on the intermediate layer 7, and in the superposed state, both ends of the upper layer 6 in the width direction are connected to the lower layer 8.
It has the same width as the intermediate layer 7 and the lower layer 8, and the same length as the intermediate layer 7 and the lower layer 8.

The uppermost layer 5 has a size that covers the entire central part of the upper layer 6 that has been superposed on the upper layer 6, but it is integrally bonded to the inner surface of the water permeable sheet 4. It's okay.

The napkin 1 having the absorbent body 2 thus formed has a front end region 17, a region 18 from the rear end to approximately the vicinity of the center, and regions 19 and 19 on both sides of the center between these regions 17 and 18. The layer is thinner than the central region 20 which protrudes on the skin contact side between the regions 19 and 19, and the central side regions 19 and 19 are the thinnest and have a flap shape with a high degree of flexibility. .

The center side areas 19.19 are 1/3 to 1 of the center area 20.
It is preferable to have a thickness of /6 and a bending stiffness (U/cm) of 173 or less in the central region 20.

Incidentally, the thickness of the central region 20 is preferably 4 to 61rrIn1 in the case of a so-called thin napkin, and 8 to 12wIt in the case of a so-called thick napkin.

The inner surface of the water-permeable sheet 4 has a central region 20 shown in FIG.
It is preferable that the upper surface of the internal laminate be integrally bonded to the top surface of the internal laminate by means of an adhesive such as hot melt, heat welding, etc. on the longitudinal direction line 21.21 along both side edges of the It may be outside the line 21.21.

That is, as shown in FIGS. 3 and 5, the central side areas 19,
In step 19, the inner surface of the water-permeable sheet 4 is integrally bonded to the bent portions at both widthwise ends of the second water-impermeable sheet 10 constituting a part of the internal laminate, preferably to the upper surface of the inner edge thereof, by the above-mentioned means. It's okay.

In addition, two strips of adhesive 23, 23 are applied to the non-skin contact surface of the napkin 1 from the front end region 17 to the center longitudinal direction of the central region 20 for fixing it to shorts, and a peel-off adhesive is applied to the upper surface of the napkin 1. Piece 24 is temporarily attached.

The napkin of the present invention, which has a structure similar to that shown above, has a front end region 17 on the wearer's abdomen side, a region 18 from the rear end to near the center on the buttocks side, and a center region 20 on the vaginal recess. The front end region 17, the region 18 from the rear end to the vicinity of the center, and the central side portions 19 and 19 between these are the peripheral regions 19. The layer is thinner than the central region 20 between .19 and .19.

That is, since the central region 20 is the thickest and tallest, and the central side regions 19 and 19 are the thinnest and have a high degree of flexibility, each region of the napkin 1 is also similar. Therefore, it fits closely to the woman's body shape, so it is less uncomfortable to use, and leakage of menstrual blood and slippage of the napkin are prevented.

Furthermore, since the front end region 17 is a thin layer, the area corresponding to the female pubic bone and clitoris feels less comfortable, and the region 18 from the rear end to the vicinity of the center is a thin layer. This reduces the feeling of use in the part that touches the buttocks, especially when the wearer sits down, and increases the bending adaptability to the buttock recess to prevent leakage of menstrual blood from the recess.
Furthermore, since the central side regions 19.19 are the thinnest and have a high degree of flexibility, the areas that contact the inner thighs of the wearer feel less uncomfortable, i.e. when the wearer walks, they The circumferential areas 19, 19 are less likely to strongly rub against the inside of the wearer's thighs, the feeling of a step when the wearer sits down is reduced, and the two areas 19, 19 are bent. The central area 20 is also an important area for menstrual blood absorption because it is easy to use.
Menstrual blood is effectively absorbed without wrinkles.

In addition, the inner surface of the water-permeable sheet 4 and the upper surface of the internal laminate are bonded 22.
, 22, the central region of the upper surface of the laminate does not lose its shape.

As in the illustrated embodiment, when the inner surface and the bent portions at both ends of the water-impermeable layer 3 for preventing menstrual blood leakage are bonded 22, 22, the bent portions at both ends of the layer 3 are bent. The state of the napkin 1 is reliably maintained and the folded portion is removed from the absorbent body 2.
It is effective in preventing menstrual blood leakage from both side edges.

In this manner, the napkin of the present invention has excellent effects that cannot be obtained with known medium-height napkins, and is extremely useful for practical use.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the napkin, Fig. 2 is a side view of the napkin, Fig. 3 is a sectional view taken along line X1-X1 in Fig. 1, and Fig. 4 is a plan view of the middle layer of the absorbent body before folding. , Figure 5 is Figure 1 x2
-Xa is a sectional view. 1... Napkin, 2... Absorber, 3.
...Water-impermeable layer, 4...Water-permeable sheet.

Claims (2)

[Scope of utility model registration request] (1) In a sanitary napkin comprising at least an absorbent body 2, a water-impermeable layer 3 located on the lower surface thereof, and a water-permeable sheet 4 covering these laminates, the absorbent body 2 has a front end region 1
7. Area 18 from the rear end to the approximate center, these peripheral areas 17,
18 center side areas 19.19 are these peripheral areas 19,19
The water-permeable sheet is thinner than the central region 20 that protrudes toward the skin contact side between them, and the peripheral regions 19, 19 are the thinnest layers, and the water-permeable sheet The napkin characterized in that the inner surface of No. 4 is integrally adhered to the upper surface of the laminate. (2) Both sides of the center area 19.19 is 1!3 of the center area 20
~1/6 thickness and the I! of the central region 20! A sanitary napkin according to claim 1, which has a bending stiffness of 3 or less.