JPH0118570Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in an absorbent sheet constituting an absorbent body used in disposable diapers to be worn by infants, the sick, the elderly, etc.

Generally, infants and other people who are unable to dispose of excrement themselves wear diapers, but today, a wide variety of disposable diapers that do not require diaper covers have been proposed and put into practical use for convenience. There is. Conventional diapers of this type generally consist of a water-permeable top sheet that comes into contact with the skin when worn, a back sheet that does not come into contact with the skin, and an absorbent body interposed between the two sheets. Some absorbers are provided with side flaps that are more flexible than the absorbent body, and a telescoping member that is longitudinally telescopically mounted in the flaps. The absorbent body often uses defibrated pulp as its main material, and a sheet of tissue paper is applied to each of the upper and lower surfaces of the absorbent body. There are also absorbers in which a hydrophobic net-like sheet and tissue paper are applied to the main part of the defibrated pulp.

On the other hand, these known diapers include a so-called hourglass-shaped diaper with a narrower inseam area;
Some are simply rectangular, but the former have excellent adhesion to the wearer's leg area. It is also desirable that the absorbent member has a so-called hourglass shape. Therefore, conventionally, there are absorbent members whose shape is made into an hourglass shape by cutting off both sides of the center of a rectangular absorbent sheet body. However, in this case, since both sides of the center of the sheet body are cut out, there is a problem in that material is wasted. Therefore, for example, JP-A-57-
As in No. 71402, diagonal notches are provided from both left and right sides of a rectangular absorbent sheet body toward the center, and by folding back both sides of the center between the notches, the sheet body is formed into an hourglass shape, and the crotch of the central part is folded back. It has also been proposed to construct the area in two or three layers. This absorber can have a multi-layered structure in the center using a single sheet, which gives good results for the water replenishment properties of the diaper. Only the upper and lower parts of the center were considered to be a single layer. Therefore, in order to double the upper and lower central portions, it was necessary to construct one absorbent body by overlapping another absorbent sheet on top of the absorbent sheet body.

Therefore, the present invention provides an absorbent sheet constituting an absorbent body interposed between a top sheet and a back sheet of a disposable diaper, in which the absorbent sheet consists of a base and folded parts on both left and right sides of the base. The base portion and both folded portions are separated by two fold lines formed in the vertical direction of the center and cuts formed from both ends of the fold lines to the upper and lower sides of the absorbent sheet, and The upper and lower parts of the base are made wider by making at least a part of each cut into a diagonal part facing in the side direction, and both folded parts are folded over the base at the bending line. The present invention provides an absorbent sheet for disposable diapers characterized by the following.

Here, the absorbent sheet may be a single absorbent sheet body or a stack of two or more absorbent sheet bodies, and each absorbent sheet body may be made of a single material or a laminate of multiple materials. .

Each absorbent sheet body may be a single absorbent material such as absorbent fibers or absorbent resin used in general disposable diapers, or a composite thereof. As the absorbent fibers, for example, natural fibers such as pulp and cotton, semi-synthetic fibers such as rayon and acetate, and mixtures of these fibers can be used. These fibers can be used by being pulverized, defibrated, etc., and then laminated. As the absorbent resin, ordinary ones can be used, and specific examples include those described in Japanese Patent Application No. 167085/1985.

An embodiment of the present invention will be described below based on the drawings. Some parts are exaggerated in the drawings for convenience of explanation.

FIG. 1 is a plan view of a state in which an absorbent sheet body 1 is continuous back and forth, and the absorbent sheet body 1 is manufactured and processed as a continuous band-like body T as shown. The absorbent sheet body 1 for one diaper consists of a base portion 2 located at the center of each base portion and folded portions 3, 3 located on both left and right sides of the base portion and indicated by diagonal lines in the figure. In the center of the absorbent sheet body, there are two parallel folding lines 4, 4 in the vertical direction (indicated by dotted lines in the figure), and from both ends of the folding lines 4, 4, the upper and lower sides of the absorbent sheet body 1. Cuts 6, 6, 6, 6 are made across the sides 5, 5, and the base portion 2 and the folded portions 3, 3 are separated by the bending lines 4, 4 and the cuts 6, 6, 6, 6. be done. The cut 6 consists of a diagonal portion 8 extending outward from the end 7 of the bending line 4, and a straight portion 9 extending perpendicularly in the vertical direction from the end of the diagonal portion 8, and the upper and lower portions of the base 2 are Formed wide.

Each notch 6 is continuously cut as a strip T by a so-called roll die cutter.
In this cutting, a pair of notches 6, 6 at the lower part of the front absorbent sheet body 1 and a pair of notches 6', 6' at the upper part of the rear absorbent sheet body 1, which are continuous in the front and back, are respectively continuously cut. .

After this cutting, the folded parts 3, 3 are folded back along the fold lines 4, 4, as shown in FIG.
The absorbent sheet body 1 is formed into a so-called hourglass shape with a wider upper and lower portion. As shown in FIGS. 3 and 4, the absorbent sheet body 1 has not only the central width portion but also the upper and lower wide portions.
It has a triple structure in which left and right folded parts 3, 3 are stacked on the center part of the base part 2.

Finally, the strip T is cut at the cut lines 10, 10 between each absorbent sheet body 1, and a single absorbent sheet body 1 is completed.

5 to 8 illustrate another embodiment, and the same reference numerals are used for substantially the same parts as in the previous embodiment, and the explanation thereof will be omitted.

As shown in FIG. 5, the absorbent sheet body 1 has two parallel folding lines 4, 4 at its center, but these folding lines 4, 4 are shorter than those in the previous embodiment. . On the other hand, notches 6, 6, 6,
6 is long and has a straight section 9, an oblique section 8, and the oblique section 8.
It has a second orthogonal portion 9' connecting the end to the bending line end 7'.

This absorbent sheet body 1 is also folded back along the folding lines 4, 4, as shown in FIGS. 6 to 8, but unlike the previous embodiment, the folded portions 3, 3 do not overlap each other, It is folded back with both ends in contact with each other, resulting in a double structure in which the left or right folded part 3 is superimposed on the center part of the base part 2.

It should be noted that the shape of the cut and the polymer structure of the folded part in the above example and this example can be selected as appropriate, and the shape of the cut can be curved instead of straight as in both examples. etc. can be changed. The length and position of the incisions are changed in consideration of the material used, the overall size of the diaper, etc.

Further, a third embodiment will be explained with reference to FIGS. 9 to 15, but only one absorbent sheet body is illustrated in the figures.

In this embodiment, a medium-width layer 1 is placed on the sheet body 1 of the second embodiment with approximately equal width between the fold lines 4, 4.
1, and a narrow layer 12 is further formed thereon. As shown in FIG. 13, this sheet body 1 is made of a Teflon paper (texture paper) 14 laminated with defibrated pulp 13, on which a polymer absorbent material 15 constituting the medium width layer 11 is sprinkled. , and then a defibrated pulp 16 of the same width is further laminated thereon (see FIG. 14). Then, a polymer absorbent material is dispersed and laminated as a narrow layer 12 on top to form one absorbent sheet. For these polymer absorbers, for example, ARASORP (trade name) manufactured by Arakawa Chemical Industries, Ltd. can be used.
It is desirable to use a polymer absorbent material having a stronger gel strength than the polymer absorbent material 15 of No. 1.

Then, as shown in FIGS. 10 to 12, this sheet is made into one absorbent body S by folding the folded parts 3, 3 over the base 2, medium width layer 11, and narrow width layer 12. . In the figure,
The medium-width layer 11 is shown with diagonal lines on the upper right, and the narrow layer 12 is shown with diagonal lines on the upper left, but the folded parts 3, 3 are not shown with diagonal lines.

Note that although it is not shown in the drawings, it is also possible to further stack tissue paper on top of the polymer absorbent material of the narrow layer 12, but this tissue paper should have the same shape as the absorbent sheet body, and the notches should be formed along with the absorbent sheet body. The folded portion may be provided and folded back together with the absorbent sheet body.

As shown in FIG. 15, this absorbent body S is stacked on a water-impermeable back sheet 18 which is larger than the absorbent body S and has an hourglass shape.
A water-permeable top sheet 19 of the same shape is superimposed. At that time, an elastic belt 20,
20 will be followed. As a result, one disposable diaper is completed, but the central width part of the hourglass-shaped sheet becomes the crotch area 21, and the upper and lower parts thereof become the front and back side areas 22, 22, respectively, which are similar to conventional disposable diapers. Anterodorsal area 22, 22
To join the sheets, hook and loop fasteners 23, 23 are attached to the ends of the sheets. It should be noted that the respective constituent materials of this embodiment are appropriately bonded as necessary, as in the case of conventional diapers.

As described above, the present invention makes it possible to manufacture a so-called hourglass-shaped absorbent sheet body by using the sheet material without waste, since the folded part divided by the folding line and the notch is folded over the base part. , it is possible to provide a sheet body which is folded multiple times not only in the crotch area of the sheet body but also in the front and back areas of the upper and lower parts thereof. Therefore, not only can the water replenishing property of the absorbent sheet body be improved, but also there is no need to overlap other absorbent sheet bodies more than necessary for the purpose of overlapping the front and back regions.

Therefore, the absorbent sheet of the present invention can be widely used as an absorbent sheet constituting an absorbent body of a disposable diaper, and can also be used as an absorbent body of sanitary napkins and the like.

[Brief explanation of the drawing]

The figures explain each embodiment of the present invention.
The figure is a plan view of the absorbent sheet body of the first embodiment before folding, FIG. 2 is a plane view after folding the same, FIG. 3 is an end view taken along the - line in FIG. line end view,
Fig. 5 is a plan view of the absorbent sheet body of the second embodiment before folding, Fig. 6 is a plan view after the same is folded, Fig. 7 is a - line end view of Fig. 6, and Fig. 8 is 9 is a plan view of an absorbent body equipped with the absorbent sheet body of the third embodiment before bending, FIG. 10 is a plan view after bending, and FIG. Figure 12 is an end view taken along the line XI-XI, Figure 12 is an end view taken along the line XII-XII, Figure 13 is an explanatory diagram of the structure of the absorbent sheet body, Figure 14 is an explanatory diagram of the structure of the medium width sheet body, and Figure 15 is FIG. 1 is a plan view of a disposable diaper with an absorbent body. DESCRIPTION OF SYMBOLS 1... Absorbent sheet body, 2... Base, 3... Folded part, 4... Folding line, 5... Upper and lower sides of absorbent sheet body, 18... Back sheet, 19... Top sheet, S... Absorber.

Claims (1)

[Scope of utility model registration request] In an absorbent sheet constituting an absorbent body interposed between a top sheet and a back sheet of a disposable diaper, the absorbent sheet consists of a base and folded parts on both left and right sides of the base, and is formed in the vertical direction at the center of the absorbent sheet. The base portion and both folded portions are separated by two fold lines and cuts formed from both ends of the fold lines to the upper and lower sides of the absorbent sheet, and at least a portion of each cut is A disposable diaper characterized in that the upper and lower portions of the base are made wide by forming diagonal portions in the side direction, and both folded portions are folded over the base along the folding line. absorbent sheet.