JPH0249653A - Sanitary napkin - Google Patents

Abstract

PURPOSE:To improve a use feeling, to eliminate lateral leakage and to withstand any bodily movement by arranging sticking tapes to the vicinities of both lower edge parts and central part of waterproof paper and heat-sealing the periphery of a napkin and that of an absorbing material. CONSTITUTION:The expanding parts of an hour-glass-shape absorbing material 1 on both sides thereof are folded at a housing time but developed in use. Constricted parts are formed to the hour-glass-shape absorbing material 1 on both sides thereof by heat seal parts 61 and the central part thereof functions as a culvert as well as bellows and the lid of the privates is hard to detach in movement and lateral leakage is prevented. Further, the absorbing material can be fixed to underwear by the sticking tapes 5 in the vicinity of both lower edge parts of waterproof paper 4 and the hour-glass-shape absorbing material 1 becomes a protruding shape by the sticking tape 51 provided to the central part of the waterproof paper 4 to be well fitted to the privates. Further, since allowance is provided to the absorbing paper 2, nonwoven fabric 3 or waterproof paper 4 between the absorbing material 1 and the sticking tapes 5, even when the hour-glass-shaped absorbing material 1 moves along with the privates, said material 1 is not detached from the privates.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to sanitary napkins.

[Conventional technology] Conventional sanitary napkins are mainly manufactured from pulp or rayon, and consist of an absorbent material that absorbs moisture and menstrual blood, and a waterproof material or waterproof polyester that repels moisture and menstrual blood to prevent it from leaking outside. It is made of laminate and has an integrated structure. Various studies have been conducted to prevent moisture, menstrual blood, etc. from leaking from the sides during use, but there is a problem that vertical wrinkles occur in sanitary napkins when used, causing them to lose their shape and making them uncomfortable to use. There is also the problem that side leakage may occur. Conventional sanitary napkins have a one-piece structure as described above, so the front side that fits the skin and the back side that contacts underwear move together, and if the back side deforms due to walking or other activities, side leakage can occur. If the front side moves to fit the skin and the back side moves in contact with the underwear, it will prevent side leakage and improve the feeling of use, so the inventor conducted various research and filed an application earlier. [Patent Application No. 59-244503 (Japanese Unexamined Patent Application No. 81-125344)]
, Japanese Patent Application No. 111-291835 (Japanese Patent Application No. 1983-145)
No. 853), Japanese Patent Application No. 82-288525].

After further research, the inventor of the present invention found that the sanitary napkin is more comfortable and easier to use than conventional sanitary napkins, completely prevents side leakage, is easy to manufacture, and can be manufactured at low cost. The present invention solves the above-mentioned problems, provides a good feeling of use,
The purpose is to provide a sanitary napkin that can withstand any type of movement without worrying about side leakage.

[Means for Solving the Problems] In order to solve the above problems and achieve the purpose of the invention, the present invention is characterized by the following configuration. That is, an absorbent material with a polymeric absorbent interposed therein is formed into an hourglass shape in the longitudinal direction, and is protruded from both sides of the hourglass shape, and an absorbent paper is placed on top of the absorbent material, and a nonwoven fabric is placed on top of that, and absorbent paper under the absorbent material,
Place waterproof paper under it, bend the protruding parts on both sides of the drum-shaped absorbent material upward, heat seal the vicinity of each end of the folded part, and then heat-seal the lower edges of the waterproof paper. It is characterized in that adhesive tape is placed near the napkin and in the center, and the periphery of the napkin and the absorbent material are heat-sealed.

[Example] DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below using embodiments shown in the drawings.

FIG. 1 is a surface view of one embodiment of the sanitary napkin according to the present invention, FIG. 2 is an expanded view of the cross section taken along the line A-A in FIG.
The figure is a schematic diagram of the cross section taken along the line A-A in Figure 1, Figure 4 is a schematic diagram of the cross section taken along the line A-A in Figure 1 in the used state, and Figure 5 is the schematic diagram taken along the line B-B in Figure 1 in the used state. It is a schematic diagram of a line cross section part. Here, l is absorbent material, 2 is absorbent paper, 3 is nonwoven fabric,
4 is waterproof paper, 5.51 is an adhesive tape, and 6.61 is a heat seal portion.

The absorbent material 1 has a polymer absorbent interposed therebetween, and is formed into a drum shape in the longitudinal direction. The absorbent material mainly uses pulverized pulp, and a polymer absorbent is interposed in the absorbent material. The pulverized pulp as an absorbent and a powdered polymer absorbent may be uniformly mixed, or the polymer absorbent may be arranged in the center of the pulverized pulp. Polymer absorbents in various shapes such as powder, sheet, or thread can be used. The polymer absorbent is a polymer compound that absorbs and retains water well, and includes, for example, sodium polyacrylate that is loosely cross-linked with a cross-linking agent.

The absorbent material 1 is formed into an hourglass shape in the longitudinal direction. This hourglass shape can be formed into any shape by a molding method, can be automated, can be mass-produced, and can be produced at low cost. becomes possible.

In addition, by forming the absorbent material 1 in an hourglass shape, it fits well in the private parts and functions to cover the private parts.Moreover, since the lid of the absorbent material 1 formed in the hourglass shape cannot be removed from the private parts, blood etc. Conventional sanitary napkins, which do not have to worry about leaking, are simply applied to the skin, and they cannot withstand movement, causing them to lose their shape, which is the biggest problem for women.
Sanitary napkins, which can cause side leakage, must have a structure that can withstand movement.To do this, it is necessary not only to apply the napkin to the private area, but also to cover one private area. If you just fill the pot with water and apply the lid from above, the water will spill out immediately if the pot tips.

However, if you put a lid on the kotsupu with a lid that is the same size as the mouth of the kotsupu, even if the kotsupu is tilted, water will not leak out even if the lid is shallow.

Is there absorbent paper on top of the absorbent material? , a nonwoven fabric 3 is placed on top of it, an absorbent paper 2 is placed under the absorbent material 1, and a waterproof paper 4 is placed below that.
to be placed. These are formed so as to protrude from both sides of the drum-shaped absorbent material 1.

The absorbent paper 2 is made of pulverized pulp or other absorbent material. As the nonwoven fabric 3, various commercially available nonwoven fabrics can be used. The waterproof paper 4 is made of a plastic film, nonwoven fabric, cloth, paper, or the like laminated with a thin film of polyethylene resin or the like.

Both of the portions of the drum-shaped absorbent material L that protrude on both sides are bent upward, and the vicinity of each end of the bent portion is heat-sealed. This heat seal portion 61 is shown in FIG.

In addition, the absorbent material 1 may be placed on a part of the absorbent paper 2 that is formed to protrude on both sides of the drum-shaped absorbent material 1, or the absorbent paper 2 may be made of the same material as the absorbent material 1. good.

Furthermore, adhesive tape 5.51 is placed near the lower edge of the waterproof paper 4 and at the center. It is convenient to use double-sided adhesive tape as the adhesive tape 5.51, and it is convenient to attach release paper to the adhesive side.

Before use, peel off the release paper.

As shown in the schematic diagram in Figure 3, the parts that protrude on both sides of the drum-shaped absorbent material l are bent when stored, but when used, they are as shown in the schematic diagram in the usage state in Figure 4. will be expanded to. Here, the heat-sealed portion 81 forms constricted portions on both sides of the drum-shaped absorbent material l, as shown in FIG. It is difficult to remove the lid of the local area even with movement, which prevents side leakage.

In addition, the adhesive tape 5 near the bottom edge of the waterproof paper 4 allows
The adhesive tape 51 in the center of the waterproof paper 4 allows the drum-shaped absorbent material 1 to form a convex shape as shown in FIG. do. Note that the adhesive tape 51 may be formed into a corrugated shape.

As mentioned above, the absorbent material l is shaped like a drum and fits well into the private parts, serving to cover the private parts, and the constrictions on both sides act as side grooves to prevent side leakage. It also has a bellows-like or accordion function, and there is play between the part that is fixed to the underwear and the absorbent material 1 that covers the private parts, so it is difficult to remove even if you move, and moreover, it is difficult to remove from the private parts. Since the lid of the drum-shaped absorbent material cannot be removed, there is no need to worry about blood leaking.

Furthermore, there is absorbent paper 2 and waterproof paper 4 that are formed to protrude on both sides of the drum-shaped absorbent material l, and in the unlikely event of a leak, the absorbent paper 2 will absorb it, so you can rest assured. By fixing the adhesive tape 5 on the part of the underwear that corresponds to the area narrower than the spacing between the adhesive tapes 5 on both sides, the absorbent paper 2, nonwoven fabric 3, and waterproof paper 4 between the absorbent material 1 and the fixing tape 5 can have a margin. Even if the hourglass-shaped absorbent material 1 moves together with the local area, the hourglass-shaped absorbent material 1 will not come off the local area, so there is no fear of side leakage and it can withstand any movement.

When fixing with adhesive tape 5 to the part of the underwear that hits the private part,
Since this embodiment is formed as described above, the adhesive tape 5 may be placed and fixed between the double portions of the underwear that contact the private parts.In this case as well, the absorbent material 1 and the adhesive tape 5
Because the absorbent paper 2, nonwoven fabric 3, and waterproof paper 4 between the
Since the drum-shaped absorbent material 1 does not come off from the local area, there is no fear of side leakage and it can withstand any movement.

Further, the area around the napkin and around the absorbent material 1 is heat-sealed 6. The heat seal 6 around the napkin is the second
As shown in the figure, the absorbent paper 2 and nonwoven fabric 3 may be wrapped in waterproof paper 4 and then heat sealed, or the absorbent paper 2. The nonwoven fabric 3 and the waterproof paper 4 may be heat-sealed in a stacked state.

Heat sealing around the absorbent material 1 is done by flattening the absorbent paper 2 and waterproof paper 4 below the absorbent material 1, and making the absorbent paper 2 and nonwoven fabric 3 above the absorbent material 1 into a chevron shape, as shown in Figure 2. Alternatively, the upper and lower absorbent papers 2, nonwoven fabric 3, and waterproof paper 4 may be stacked on the side of the absorbent material 1 and heat-sealed.

[Effects of the Invention] Since the present invention is configured as described above, it has the following effects.

Firstly, by forming the absorbent material 1 in an hourglass shape, it fits well in one private part and functions to cover the private part, and moreover, since the lid of the absorbent material 1 formed in an hourglass shape cannot be removed from the private part, This has the effect that there is no fear of blood etc. leaking.

Second, since the absorbent paper 2, non-woven fabric 3, and waterproof paper 4 are made to have a margin between the absorbent material 1 and the fixing tape 5, the adhesive tape 5 is used to attach the adhesive tape on both sides to the part of the underwear that will hit the private parts. By fixing the gap narrower than the interval 5, even if the hourglass-shaped absorbent material 1 moves together with the local area, the hourglass-shaped absorbent material 1 will not come off the local area, so there is no worry about lateral leakage, and no matter how much movement It has the effect of being durable and comfortable to use.

Thirdly, by bending both the protruding parts on both sides of the hourglass-shaped absorbent material upward and heat-sealing the vicinity of each end of the folded parts, the heat-sealing parts 81 are used to make the hourglass-shaped absorbent material L during use. Constrictions are formed on both sides, which act as side grooves and have the effect of preventing side leakage.

Fourthly, the waterproof paper 4 can be fixed to underwear using the adhesive tape 5 near both lower edges, and the drum-shaped absorbent material 1 can be fixed to the underwear using the adhesive tape 51 in the center of the waterproof paper 4 as shown in FIG. As shown, it has a convex shape that fits well into one private area and covers the local area, making it difficult to remove even if you move.Furthermore, since the lid of the drum-shaped absorbent material 1 cannot be removed from the local area, blood This has the effect that there is no need to worry about leakage.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a surface view of one embodiment of the sanitary napkin according to the present invention, and FIG.
Figure 3 is an expanded view of the cross section taken along line A-A in Figure 1.
FIG. 4 is a schematic diagram of a cross section taken along line A in FIG. 1 in a used state, and FIG. 5 is a schematic diagram of a cross section taken along line B-B in FIG. 1 in a used state. . l...Absorbent material, 2...Absorbent paper, 3...Fist non-woven fabric, 4...Waterproof paper, 5.51...Adhesive tape. 6.81＠Φ・Heat seal part. Agent Patent Attorney Elementary School 1) Osamu Parent

Claims (1)

[Claims] An absorbent material with a polymer absorbent interposed therein is formed into an hourglass shape in the longitudinal direction, overhanging both sides of the hourglass shape, an absorbent paper is placed on top of the absorbent material, and a nonwoven fabric is placed on top of the absorbent paper. Place absorbent paper under the material and waterproof paper below it, bend both sides of the drum-shaped absorbent material upward,
The vicinity of each edge of the folded portion shall be heat-sealed, adhesive tape shall be placed near both lower edges of the waterproof paper and in the center, and the periphery of the napkin and the absorbent material shall be heat-sealed. A sanitary napkin featuring: