JPH04164446A - Sanitary napkin and its manufacture - Google Patents

Abstract

PURPOSE:To allow an upper absorbent member to exert fully its function, permit a lower absorbent member to work fully with its fixing service, and eliminate fear of leaking aside perfectly by preparing the upper and lower absorbents separately, laying the upper absorbent over and the lower below, and fixing the ends in longitudi nal direction. CONSTITUTION:In an upper absorbent member 1, pulp 4 and absorptive paper 5 are prepared as absorbing material, and a polymer absorbing agent 3 is interposed among the pulp 4, and the paper 5 is pinched from above and below. Then an unwoven cloth 6 is applied to the oversurface while waterproof paper 7 is arranged at both sides longitudinal of the undersurface, and the outside situated unwoven cloth 6 is bonded or fused to the waterproof paper 7. In a lower absorbent member 2, on the other hand, polymer absorbing agent 3 is interposed among the pulp 4, and absorptive paper 5 is laid on the oversurface whereupon unwoven cloth 6 is placed, while waterproof paper 7 is arranged on the undersurface, and the perimeters of these unwoven cloth 6 and waterproof paper 7 are bonded or fused. Further a fixation tape 9 is provided on the undersurface of the waterproof paper 7. Exfoliation paper 91 is affixed to this fixation tape 9 to be exfoliated prior to service. These upper and lower absorbent members 1, 2 are piled one over the other, and only the ends in the longitudinal direction are secured to complete the product.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a sanitary napkin and a method for manufacturing the sanitary napkin.

[Conventional technology and its problems] Conventional sanitary napkins are mainly manufactured from bulbs and rayon, and include an absorbent material that absorbs moisture and menstrual blood, and a material that repels moisture and menstrual blood to prevent it from leaking outside. It is made of waterproof material and has an integrated structure. Various studies have been conducted to prevent moisture and menstrual blood from leaking from the sides during use, but there are problems in that sanitary napkins tend to wrinkle vertically when used, making them uncomfortable to use, and also preventing leakage from the sides. There was a problem that it could happen. Conventional sanitary napkins have a one-piece structure as described above, so the front side that fits against the skin and the back side that touches underwear move together, and when the back side deforms due to walking or other activities.
This caused side leakage, etc. The front side fits your skin and moves, and the back side moves against your underwear to prevent side leakage, etc.
In addition, the feeling of use is improved, so the present inventor developed a method for manufacturing sanitary napkins in which the absorbent material on the front side and the waterproof material on the back side are formed separately and overlapped, and both ends of the absorbent material and the waterproof material are adhesively fixed. Invented a napkin and applied for it first (Patent No. 1)
489596, Japanese Patent Publication No. 63-36778) (Japanese Patent Application No. 61-291635, Japanese Patent Publication No. 145653-1983)
Patent Application No. 1988-288525, Japanese Patent Application No. 1-131660
After that, the inventor conducted further research on a structure that fixes both longitudinal ends of the upper absorbent body and the lower absorbent body, and developed a structure that is more comfortable and easier to use than conventional sanitary napkins, and also completely prevents side leakage. It was possible to obtain a sanitary napkin that is easy to manufacture and can be manufactured at low cost, as well as being a napkin that prevents hair loss.

An object of the present invention is to solve the above problems and provide a sanitary napkin and a method for manufacturing the sanitary napkin as described above.

In order to solve the above-mentioned problems and achieve the purpose of the invention, the sanitary napkin and the method for manufacturing the sanitary napkin according to the present invention are characterized by being configured as follows. . That is, the first aspect of the present invention is to use an absorbent material with a polymer absorbent interposed therebetween, an upper absorbent body formed by disposing a nonwoven fabric on the upper surface and waterproof paper on both sides in the longitudinal direction of the lower surface, and a polymer absorbent material interposed therebetween. A lower absorbent body formed by disposing a non-woven fabric or absorbent paper on the upper surface, a waterproof paper on the lower surface, and a fixing tape on the lower surface of the waterproof paper is placed on top of the absorbent material with the agent interposed therebetween, and the above-mentioned upper A sanitary napkin characterized in that only the longitudinal ends of the absorbent body and the lower absorbent body are fixed, and the second aspect of the present invention is that a polymer absorbent is interposed between the absorbent materials and the upper surface is A first step of arranging waterproof paper on both longitudinal sides of the nonwoven fabric and bonding or fusing the periphery of the nonwoven fabric and waterproof paper to form an upper absorbent body, and a polymer absorbent between the absorbent materials. A lower absorbent body is made by interposing a non-woven fabric or absorbent paper on the upper surface and waterproof paper on the lower surface, gluing or fusing the periphery of the non-woven fabric or absorbent paper and the waterproof paper, and providing a fixing tape on the lower surface of the waterproof paper. a second step of forming;
Place the upper absorbent body obtained in the above first step on top and the second
The third aspect of the present invention is a method for manufacturing a sanitary napkin, which comprises a third step of stacking the lower absorbent body obtained in the step downward and fixing only both ends in the longitudinal direction. Absorbent material with a polymer absorbent interposed on top of an absorbent material with a molecular absorbent interposed, an upper absorbent body consisting of a non-woven fabric on the upper surface and waterproof paper with a hole in the center on the lower surface. The upper absorbent body and the lower absorbent body are stacked with the lower absorbent body formed by disposing non-woven fabric or absorbent paper on the upper surface, waterproof paper on the lower surface, and fixing tape on the lower surface of the waterproof paper, and stacking the upper absorbent body and the lower absorbent body. A sanitary pad is characterized in that only both ends in the longitudinal direction are fixed, and the fourth aspect of the present invention is a sanitary pad with a polymer absorbent interposed between absorbent materials, a nonwoven fabric on the upper surface, and a nonwoven fabric in the center. A first step of disposing a waterproof paper with holes on the lower surface and gluing or fusing the periphery of the nonwoven fabric and the waterproof paper to form an upper absorbent body, interposing a polymer absorbent between the absorbent materials, A lower absorbent body is formed by disposing a nonwoven fabric or absorbent paper on the upper surface and waterproof paper on the lower surface, gluing or fusing the periphery of the nonwoven fabric or absorbent paper and the waterproof paper, and providing a fixing tape on the lower surface of the waterproof paper. 2 steps and
Place the upper absorbent body obtained in the above first step on top and the second
This method of manufacturing a sanitary napkin is characterized by comprising a third step of stacking the lower absorbent body obtained in the step downward and fixing only both ends in the longitudinal direction.

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

FIG. 1 is a top view of the upper absorbent body of the first embodiment of the sanitary napkin according to the present invention, FIG. 2 is a bottom view of the same, and FIGS. 3 and 4 are other views of the upper absorbent body of the first embodiment. FIG. 5 is a top view of the lower absorbent body; FIG. 6 is a bottom view of the lower absorbent body; FIG. 7 is a bottom view of the upper absorbent body of the second embodiment; FIGS. 8 and 9 are cross-sectional views of the central portion. here,
1 is an upper absorber, 2 is a lower absorber, 3 is a polymer absorbent,
4 is a valve, 5 is absorbent paper, 6 is a nonwoven fabric, 7 is waterproof paper, 7
1 is a hole, 8 is a fixed part at both ends, 9 is a fixing tape, and 91 is a release paper.

In the first embodiment of the sanitary napkin according to the present invention, the upper absorbent core 1 is placed on top and the lower absorbent core 2 is stacked on the bottom, and only the longitudinal ends of the upper absorbent core 1 and the lower absorbent core 2 are fixed. It becomes. Moreover, it is manufactured as follows.

The upper absorbent body 1 is formed by disposing a nonwoven fabric 6 on the upper surface of an absorbent material with a polymer absorbent 3 interposed therebetween, and waterproof paper 7 on both sides of the lower surface in the longitudinal direction. Here, examples of the absorbent material include a bulb 4, absorbent paper 5, and the like. Further, as the waterproof paper 7, synthetic resin film laminated paper and the like can be mentioned.

Note that the synthetic resin film laminated paper is one in which a thin film of polyethylene resin or the like is laminated on nonwoven fabric, cloth, paper, or the like.

The upper absorbent body 1 is formed as follows. First, a bulb 4 and absorbent paper 5 are prepared as absorbent materials, a polymer absorbent 3 is interposed between the bulbs 4, and the absorbent paper 5 is sandwiched from above and below. Next, a nonwoven fabric 6 is placed on the upper surface, waterproof paper 7 is placed on both longitudinal sides of the lower surface, and the outer nonwoven fabric 6 and the waterproof paper 7 are bonded or fused to form the upper absorbent body 1. This is the first step of the first embodiment.

The mixing state of the valve 4 and the polymer absorbent 3 may be such that the valve 4 and the polymer absorbent 3 are completely and uniformly mixed.
Alternatively, the polymer absorbent 3 may be placed in the center of the valve 4. The polymer absorbent 3 can be in various shapes such as powder, sheet, or thread.

The polymer absorbent 3 is a polymer compound that absorbs and retains water, and includes, for example, sodium polyacrylate crosslinked with a crosslinking agent.

The upper absorbent core 1 may be shaped like a square in the longitudinal direction, as shown in FIGS. 3 and 4. ■When shaping into a shape, place the valve 4 with the polymer absorbent 3 on top of the waterproof paper 7, place the nonwoven fabric 6 on top of it, and then sandwich it between the upper mold and the lower mold, apply pressure, and This is the so-called molding method, in which the material is formed by heating, but this molding method allows it to be formed into any shape, can be automated, and can be mass-produced at low cost. becomes.

In addition, in the case of the I-shape, as shown in the figure, if you widen the right side of the wide part and reduce the curvature of the end, and wear it during use so that the right side is at the rear, it will not leak even when sleeping. There is no problem at all and you can rest in peace.

In contrast to the upper absorbent body 1 of the first embodiment in which waterproof paper 7 is disposed on both longitudinal sides of the upper absorbent body 1 of the second embodiment, as shown in FIG. A waterproof paper 7 with a hole 71 in the center is placed on the bottom surface.

In the case of the upper absorbent body 1 of the second embodiment, in the first step, a polymer absorbent is interposed between the absorbent materials, a nonwoven fabric is placed on the top surface, and waterproof paper with a hole in the center is placed on the bottom surface. The upper absorbent body is formed by gluing or fusing the nonwoven fabric and the waterproof paper around it.

In both the first and second embodiments, the nonwoven fabric and waterproof paper of the upper absorbent body 1 may have negative ends as shown in FIG. As shown in the figure, the waterproof paper may wrap around the non-woven fabric.

The lower absorbent body 2 is made of an absorbent material with a polymer absorbent 3 interposed therebetween, a non-woven fabric 4 or absorbent paper 5 on the upper surface, waterproof paper 7 on the lower surface, and a fixing tape 9 on the lower surface of the waterproof paper 7. It will be arranged.

Although the lower absorbent body 2 according to the first embodiment has the absorbent paper 5 disposed on the upper surface, a nonwoven fabric 6 may be disposed instead of the absorbent paper 5. Further, the waterproof paper 7 on the lower surface may be formed by bending the absorbent paper 5 on the upper surface and the waterproof paper 7 on the lower surface downward and inward from the bonded or fused portion, as shown in FIG. 8, or as shown in FIG. As shown in FIG. 2, the absorbent paper 5 on the upper surface and the waterproof paper 7 on the lower surface may be bonded or fused together. Then, a fixing tape 9 is placed on the lower surface of the waterproof paper 7.

A release paper 91 is arranged on the fixing tape 9, and the release paper 91 is peeled off at the time of use. The fixing tape 9 may be a double-sided adhesive tape, or a hot-melt adhesive may be applied and a release paper may be adhered thereon.

The lower absorbent core 2 according to the second embodiment is also similar to the lower absorbent core 2 according to the first embodiment.

The lower absorbent bodies according to the first and second embodiments are both formed wider than the upper absorbent body 1 as shown in FIGS. 8 and 9, but even if they are the same width, good.

The lower absorbent body 2 according to the first embodiment and the second embodiment is formed as follows. First, a bulb 4 and an absorbent paper 5 are used as absorbent materials.
is prepared, a polymer absorbent 3 is interposed between the valve 4,
An absorbent paper 5 is placed on the upper surface, a non-woven cloth 6 is placed on it, a waterproof paper 7 is placed on the lower surface, and the peripheries of the non-woven fabric 6 and the waterproof paper 7 are adhered or fused.

Furthermore, a fixing tape 9 is provided on the lower surface of the waterproof paper 7 to form the lower absorbent body 2. This is the second step.

Both the sanitary napkins of the first example and the second example are stacked with the upper absorbent core 1 obtained in the first step above and the lower absorbent core 2 obtained in the second step below, It is formed by fixing only both ends in the longitudinal direction.

Both the sanitary napkins of the first example and the second example are:
The upper absorbent core 1 obtained in the first step is stacked on top and the lower absorbent core 2 obtained in the second step is stacked on the bottom, and only both ends in the longitudinal direction are fixed. This is the third step.

Although there are various methods of fixing the upper absorbent core 1 and the lower absorbent core 2, adhesion or fusion is suitable. Both ends may be fixed in their entirety as shown in FIG. 1, or a portion of both ends, such as both ends, may be fixed.

Since the upper absorbent core 1 and the lower absorbent core 2 are fixed in this way, the upper absorbent core 1 and the lower absorbent core 2 each have different functions in the central portion. That is, the upper absorbent core 1 fits the skin and moves freely to prevent moisture, menstrual blood, etc. from leaking and spreading in all directions, and the lower absorbent core 2 is fixed to underwear such as shorts with a fixing tape 9. Prevents side leakage due to body movement.

Furthermore, in the first embodiment, blood or the like is exposed to the non-lined cloth 6 of the upper absorbent body 1.
After being absorbed by the absorbent material through the absorbent material, it is transferred from between the waterproof paper 7 on the lower surface of the upper absorbent material 1 to the lower absorbent material 2, and then transferred to the lower absorbent material 2.
Since it is absorbed by the absorbent material, there is no need to worry about side leakage.

Further, in the second embodiment, blood and the like are absorbed into the absorbent material through the nonwoven fabric 6 of the upper absorbent body 1, and then migrate to the lower absorbent body 2 through the holes 71 in the waterproof paper 7 on the lower surface of the upper absorbent body 1, and are transferred to the lower absorbent body 2. Since it is absorbed by the absorbent material of the body 2, there is no need to worry about side leakage.

[Effects of the Invention] Since the sanitary napkin obtained by the sanitary napkin and the sanitary napkin manufacturing method according to the present invention is configured as described above, it has the following effects.

In other words, the upper absorbent body and the lower absorbent body are made separately, the upper absorbent body is placed on the upper side, and the lower absorbent body is placed on the lower side, and both longitudinal ends are fixed, so that the central part of the upper absorbent body is It becomes possible to move freely as one with the local part of the body, and the upper absorbent body can perform its function 100%. In addition, the lower absorbent core performs 100% of the fixing function.
Blood, etc. absorbed by the upper absorbent body can be transferred to the lower absorbent body through the holes in the waterproof paper or between the waterproof paper on the bottom of the upper absorbent body, and then absorbed into the absorbent material of the lower absorbent body. There is no need to worry about side leakage. The upper absorbent body is shaped like a kangaroo's bag, so menstrual blood and moisture are trapped inside the bag. Furthermore, since the lower absorbent body is provided below the upper absorbent body, menstrual blood and moisture are also absorbed into the lower absorbent body, which has the effect of preventing side leakage at all.

Furthermore, since the method for manufacturing the sanitary napkin according to the present invention is configured as described above, it is easy to manufacture and can also be manufactured by an automatic machine, so it has the effect that it can be manufactured at low cost. .

[Brief explanation of the drawing]

FIG. 1 is a top view of the upper absorbent body of the first embodiment of the sanitary napkin according to the present invention, FIG. 2 is a bottom view of the same, and FIGS. 3 and 4 are other views of the upper absorbent body of the first embodiment. 5 is a top view of the lower absorbent body, FIG. 6 is a bottom view of the lower absorbent body, and FIG. 7 is a bottom view of the upper absorbent body of the second embodiment. 8 and 9 are cross-sectional views of the central portion. 1... Upper absorbent body, 2... Lower absorbent body, 3... Polymer absorbent, 4... Valve, 5... Absorbent paper, 6... Nonwoven fabric, 7... Waterproof paper , 71... Hole, 8... Fixing parts at both ends, 9... Fixing tape, 91... Release paper. Agent Patent Attorney Elementary 1) Osamu Parent Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (4)

[Claims] (1) An absorbent material with a polymer absorbent interposed thereon, an upper absorbent body made of a non-woven fabric on the upper surface and waterproof paper on both sides in the longitudinal direction of the lower surface, and an absorbent material with a polymer absorbent interposed therebetween. The upper absorbent body and the lower absorbent body are stacked with the lower absorbent body formed by disposing a non-woven fabric or absorbent paper on the upper surface, waterproof paper on the lower surface, and fixing tape on the lower surface of the waterproof paper facing down. A sanitary napkin characterized in that only the longitudinal ends of the napkin are fixed. (2) A polymer absorbent is interposed between the absorbent materials, a nonwoven fabric is placed on the top surface, and waterproof paper is placed on both longitudinal sides of the bottom surface, and the nonwoven fabric and the waterproof paper are glued or fused around the top to form an upper absorbent body. A polymer absorbent is interposed between the absorbent material, a nonwoven fabric or absorbent paper is placed on the top surface, and waterproof paper is placed on the bottom surface, and the surroundings of the nonwoven fabric or absorbent paper and the waterproof paper are bonded or A second step of fusing the waterproof paper and providing a fixing tape on the lower surface of the waterproof paper to form a lower absorbent body; A method for producing a sanitary napkin, which comprises a third step of stacking the napkins with their bodies facing down and fixing only both ends in the longitudinal direction. (3) An upper absorbent body consisting of an absorbent material with a polymer absorbent interposed thereon, a non-woven fabric on the upper surface and a waterproof paper with a hole in the center on the lower surface, and a polymer absorbent interposed on top. The lower absorbent body formed by disposing a nonwoven fabric or absorbent paper on the upper surface, waterproof paper on the lower surface, and fixing tape on the lower surface of the waterproof paper is stacked on top of the above absorbent material. A sanitary napkin characterized in that only the longitudinal ends of the lower absorbent body are fixed. (4) A polymeric absorbent is interposed between the absorbent materials, a nonwoven fabric is placed on the top surface, and waterproof paper with a hole in the center is placed on the bottom surface, and the nonwoven fabric and the waterproof paper are bonded or fused around the edges. The first step of forming the upper absorbent body, interposing a polymer absorbent between the absorbent material, disposing a nonwoven fabric or absorbent paper on the upper surface and waterproof paper on the lower surface, and forming the surroundings of the nonwoven fabric or absorbent paper and the waterproof paper. A second step of gluing or fusing the waterproof paper and providing a fixing tape on the lower surface of the waterproof paper to form a lower absorbent body, and placing the upper absorbent body obtained in the above first step on top, A method for manufacturing a sanitary napkin, which comprises the following steps: stacking the lower absorbent body with the lower absorbent body facing down and fixing only both ends in the longitudinal direction.