JPH0648638U - Absorber for disposable diapers - Google Patents

Abstract

(57) [Summary] [Purpose] Even if the absorbent body is thin and has a high shape-retaining property, the absorbent body can quickly diffuse and absorb urine and the like throughout the absorbent body. I will provide a. [Structure] An absorber having a press recess 11 formed in a part of the absorber on the surface sheet 2 side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an absorbent body of a disposable diaper, and more particularly, in an absorbent body having improved shape retention by mixing a shape-retaining material, urine, loose stools, etc. are quickly and effectively diffused throughout the absorbent body for excellent absorption. The present invention relates to an absorber exhibiting the property.

[0002]

[Prior art]

 FIG. 5 is a development explanatory view of the pants-type disposable diaper P. The absorbent body 1 is housed between a water-impermeable backsheet 3 and a water-permeable topsheet 2, and between the backsheet 3 and the frontsheet 2 an elastic body 4b for the body and legs are used. The elastic body 4a is appropriately attached, and the end side edges 5a and 5b of the diaper are bonded to the front and back to form a pant-type structure.

The above-mentioned absorber is formed by mixing crushed pulp and superabsorbent resin, but in recent years, a mixture of a heat-sealing fiber material and the like has been commercially available for the purpose of enhancing the shape retention of the diaper body. There is. That is, in manufacturing the absorber, the pulp material, the superabsorbent resin and the heat-sealing fibers are mixed into a predetermined shape and then heat-treated to melt a part or all of the heat-sealing fibers. In general, it is entangled with pulp fibers and subjected to pressure treatment to improve shape retention. Since such an absorbent body is formed to be relatively thin, it is possible to eliminate the rough feeling of the disposable diaper, and it is less likely to lose its shape even if it absorbs urine and the like.

However, when the crushed pulp and the heat-sealing fibers are three-dimensionally entangled by the heating / pressurizing treatment, the superabsorbent resin wrapped between them absorbs water and swells. However, there are problems that the pulp fibers become too dense and the diffusion of urine, etc. slows down, and the amount of water stored between pulp fibers decreases. As a result, the amount of water absorbed per unit time is reduced and urine and the like cannot be absorbed promptly, so that urine often leaked from the diaper. In particular, since a large amount of urine is released within 10 to 20 seconds after the start of urination, urine leakage during this period was a serious problem.

[0005]

[Problems to be solved by the device]

 The present invention solves the above-mentioned problems of the prior art, and is an absorber capable of promptly absorbing and absorbing urine and the like even if the absorber is configured to be thin and has high shape retention. The purpose is to provide.

[0006]

[Means for Solving the Problems]

 The absorbent body of the present invention which can achieve the above object is an absorbent body which is housed between a top sheet and a back sheet of a disposable diaper and is composed of a pulp material, a super absorbent resin and a shape-retaining material. The gist of the invention is that a press recess is formed in a part of the.

[0007]

[Action and Example]

 FIG. 1 is a perspective view showing a typical embodiment of the absorber of the present invention. The absorbent body 1 is made of a pulp material, a highly absorbent resin, and a shape-retaining material. On the surface sheet side of the absorbent body 1, groove-shaped press recesses 11, 11, ... Are formed along the longitudinal direction of the diaper. A protrusion 12 is formed between the recesses. Since the absorbent material is loaded into the bottom of the recess 11 at a high density, the urine flowing in from the surface sheet side is quickly guided to the projection 12 and the entire absorbent body by the recess 11 serving as a conduit. It spreads and is absorbed by superabsorbent resins and pulp fibers inside the absorber.

The groove-shaped recess 11 is not limited to one extending in the longitudinal direction of the diaper as shown in FIG. 1, but one extending in the transverse direction of the diaper or one extending in an oblique direction, Alternatively, a combination of these may be used, and the groove-shaped recess 11 may be formed to be curved or bent.

FIG. 2 is a perspective explanatory view showing another embodiment of the present invention, in which the recess 11 is formed along the peripheral edge of the absorbent body 1. Therefore, since the absorbent material has a high density in the peripheral portion of the absorbent body 1 and has a low density and bulkiness in the central portion, the urine is diffused in the central portion near the source of urine to allow rapid absorption and In the part, the absorber was able to maintain its shape. Further, in the case of an absorber (not shown) having a concave portion formed in the central portion, a time-lag absorption effect is exhibited in which urine is once accumulated in the concave portion and then quickly absorbed in the peripheral portion of the absorber.

In the present invention, it is also possible to form a recess (or a protrusion) in the central portion as shown in FIG. 2 and combine the groove-shaped recess as shown in FIG. The manufacturing method of the absorbent body of the present invention is not particularly limited. For example, a pattern type drum is a mixture of pulverized pulp material, superabsorbent resin, and heat-melting shape-retaining material such as heat-sealing fiber or hot-melt powder. 3), after laminating into a predetermined shape, part or all of the shape-retaining material is melted in a heating furnace, and before these are completely cooled and solidified, the pressing die press shown in FIG. 3 or the pressurization shown in FIG. A method of forming with a roll can be adopted.

That is, in the example shown in FIG. 3, the pressing mold 14 having the protrusion 14a is pressed against the absorber 1 to form the recess 11, and in FIG. 4, the protrusion 15a is formed. The pressure roller 15 is pressed against the absorber 1 to form the recess 11. Of course, the shape of the concave and convex portions of the press is appropriately selected according to the shape of the press concave portion formed in the absorber. In addition, it is preferable that the portion other than the concave portion is not pressurized in order to have diffusibility. The shape-retaining material may be solidified during the formation of the recess, or may be left molten at the stage of forming the recess and then cooled and solidified.

Further, as the shape-retaining means, for example, a method of applying an emulsion adhesive or a hot-melt adhesive from a spray nozzle or the like instead of using heat-sealing fibers or hot-melt powder to adhere pulp is adopted. In this case, the adhesive is applied while laminating the pulp and the superabsorbent resin, and the pulp or the like is further laminated if necessary, and the concave portion is formed by the pressing die or the pressure roll shown in FIGS. 3 and 4. Means such as can be applied.

The absorbent body of the present invention can be applied not only to the pants-type disposable diaper as shown in FIG. 5 but also to a flat-plate-shaped or substantially hourglass-shaped disposable diaper using a fastening tape.

[0014]

[Effect of device]

 The absorbent body of the present invention is configured as described above, and has a high absorbability even though it is an absorbent body having excellent shape retention performance. It could be effectively absorbed by being diffused throughout the absorber, and it was possible to reliably prevent urine from leaking outside the diaper.

[Brief description of drawings]

FIG. 1 is a perspective view showing a typical embodiment of the absorbent body of the present invention.

FIG. 2 is a perspective view showing another embodiment of the present invention.

FIG. 3 is an explanatory view showing an example of a method for manufacturing the absorber of the present invention.

FIG. 4 is an explanatory view showing an example of a method for manufacturing the absorber of the present invention.

FIG. 5 is a development explanatory view of a pants-type disposable diaper.

[Explanation of symbols]

 1 Absorber 2 Topsheet 3 Backsheet 4a Elastic 4b Elastic 11 Recess 12 Protrusion

Claims (5)

[Scope of utility model registration request] 1. An absorbent body that is housed between a topsheet and a backsheet of a disposable diaper and is made of a pulp material, a superabsorbent resin and a shape-retaining material, and has a press recess formed in a part of the topsheet side. An absorbent body of a disposable diaper characterized by the above. 2. The absorbent article for a disposable diaper according to claim 1, wherein the press recesses are formed in a groove shape in a longitudinal direction or a lateral direction of the diaper. 3. The absorbent article for a disposable diaper according to claim 1, wherein the press recesses are formed in a groove shape in the longitudinal and transverse directions of the diaper. 4. The absorbent body of the disposable diaper according to claim 1, wherein the press recess is formed along the peripheral edge of the absorbent body. 5. The absorber of the disposable diaper according to claim 1, wherein the press recess is formed so as to be depressed in the center of the absorber.