JPS608825B2 - Yamagata absorbent body and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chevron-shaped absorbent body and a method for producing the same, and in particular to a chevron-shaped absorbent body and its manufacturing method used in absorbent articles that are applied to the human body, such as sanitary napkins. Regarding the manufacturing method.

Absorbent articles generally have an absorbent body, a liquid-permeable sheet on the use side, and a leak-proof material on the opposite side. Instead of using a sheet-like absorber with a uniform thickness, for example, a part of the absorber, such as the center, is thickened to form a mountain shape, increasing absorption efficiency. The body is known. Traditionally, this type of chevron-shaped absorbent material has been known, such as one in which the absorbent material itself is molded so that it is thicker in the center, and one in which a smaller absorbent material is placed on top of a sheet-like absorbent material. However, all of them required complicated processes to manufacture. An object of the present invention is to provide a chevron-shaped absorbent body that is easy to manufacture and has high absorption efficiency.

That is, in the chevron-shaped absorbent body of the present invention, a sheet-like absorbent body in which a part of one side in the length direction bulges out in the width direction to form a bulge portion is arranged such that the directions of the bulges are opposite to each other. , and the bulges are overlapped so that at least a portion of the bulges are overlapped.

FIG. 1 is a perspective view illustrating an embodiment of the chevron-shaped absorber of the present invention.
The absorbent body 11 and the second absorbent body 13 are shown spaced apart in the vertical direction for the sake of explanation.

Figure 2 shows a plan view of this embodiment, Figures 3A and 3B
3C are cross-sectional views taken along line AA', line BB, and line C-0 in FIG. 2, respectively. In the first absorbent body, a part of one side in the longitudinal direction forms a bulge portion 11A in the width direction, that is, a wide portion, and a non-bulge portion or a portion with a small bulge forms a narrow width portion. It exhibits a sine curve-shaped bulge, with the maximum bulge point approximately at the center in the length direction.
The first absorbent body and the second absorbent body have almost the same shape, and the two absorbent bodies are arranged so that the directions of the bulges are opposite to each other and the bulges partially overlap. , are superimposed. Particularly, as is clear from FIGS. 3A to 3C, the central portion has a mountain-like shape with a thick bulge. In addition,
In the present invention, the bulging portion refers to the entire bulging portion in the width direction, and does not simply refer to the protruding portion. FIG. 4 shows a perspective view equivalent to FIG. 1 of another embodiment, and FIG. 5 shows a plan view, and it can be seen that the chevron-shaped absorbent body of this example has two convex portions.

Although the first or second absorbent body has been shown to be bulged in a sine curve shape, it may be bulged in another curved shape or a linear shape such as a trapezoid shape.

Furthermore, ``Although we have given an example in which objects of almost the same shape are overlapped so that they have an axis of line symmetry, the combination of the first and second absorbers, or the form of their overlapping, may be difficult if a partially thick portion is formed. It does not matter in particular. Fig. 6 is a perspective view of another embodiment, and in this embodiment, in order to adjust the shape of the absorber, the first absorbent body 11, the second absorbent body 1
3, a rectangular third absorbent body 15 is laminated.

Figure 7 is this plan view, Figure 8A, Figure 8B and Figure 8C.
The figures are respectively drawn from lines A-A', B-B' and C- of Fig. 7.
FIG. 4 represents a cross-sectional view along C'. FIG. 9 is a perspective view showing a combination of an absorbent body that is linearly bulged and has a notch on the side opposite to the bulging side of the bulge, and FIG. Its plan view, Figure 11A, Figure 11B
The figure and FIG. 11C are lines A-A′ in FIG. 10, respectively.
It is a sectional view along BB' and C-0. As can be seen from this figure, the first absorbent body 11 has a notch 11B at the bulge 11A. In this embodiment, the bulge shape and the notch shape are the same, but they may be different. 1st
The absorbent body 11 and the second absorbent body 13 are stacked together with the rectangular third absorbent body 15, and are thickest at the center, thinnest at the sides in the width direction, and at both sides in the length direction. The part is of medium thickness. Of course, it is possible to make appropriate changes such as rounding the corners of this chevron-shaped absorbent body to make the overall shape elliptical, and it is also possible to omit the third absorbent body. The chevron-shaped absorbent core of the present invention can be manufactured by suitably combining and overlapping the first and second absorbent cores as described above, but the cutting process, overlapping process, and cutting process can be skillfully performed as described below. By combining them, it is possible to manufacture them efficiently.

That is, another aspect of the present invention is to cut a long sheet-like absorbent body approximately at the center in the width direction so that peaks and valleys are repeated at a constant pitch in the length direction, and then cut A method for producing a mountain-shaped absorbent body, which comprises stacking the long sheet-like absorbent body so that the peaks match the peaks and the valleys match, and then cutting them into appropriate lengths in the longitudinal direction. It is. Examples will be described below with reference to the accompanying drawings.
The longest sheet-like absorbent body 17 as shown in the plan view in FIG.
The sheets 17a and 17 are cut so that peaks and valleys are repeated at a constant pitch in the length direction approximately at the center in the width direction.
It is cut into b. This cutting can be performed, for example, by continuously cutting the longest sheet with a cutter while conveying it with a conveying roller or the like. Although FIG. 12 shows the case of cutting into a sinusoidal waveform, this shape is not particularly limited, and for example, as shown in FIG. 13, it can also be cut into an angular shape. This cutting is 17a
It is desirable to cut the material so that the material and the material 17b have an axis of line symmetry. Next, the cut sheets 17a and 17b are stacked one on top of the other so that the peaks match each other and the valleys match each other.

This superposition is performed as shown in FIG.
While transporting 7a and 17b, the waveforms of either one may be shifted by 1/2 pitch from the other, and then they may be superimposed as shown in FIGS. 16 and 16. In addition,
Although these drawings are plan views, hatching with opposite slopes is added to clearly show the overlapping state. Next, a chevron-shaped absorbent body is obtained by cutting the stacked absorbent body at an appropriate location.

If you cut at points A and B in Figure 15, Figures 1 to 3C
The chevron-shaped absorber shown in the figure is obtained. Further, by further layering a regular long sheet on the material shown in FIG. 16 and cutting it, the chevron-shaped absorbent body shown in FIGS. 6 to 8C can be obtained. By appropriately changing the overlapping dimensions or cutting positions of the cut sheets, the chevron shape and the position of the convex portions of the chevron-shaped absorbent body obtained can be adjusted. Figure 17 shows
A case is shown in which a long sheet-like absorbent body having notches 17B on both sides is used as the long sheet-like absorbent body, and the notches 17B can be created at the same time as cutting, or before or after cutting.

Furthermore, if the shape of the notch and the shape of the peak or valley are the same as in this example, use the longest medium-wide sheet, cut it into many pieces in the width direction, and make a number of cut sheets. 17a・・・・・・・・・・・・N is obtained, and a chevron-shaped absorbent body is obtained by combining two of each, stacking them in the same manner as shown in FIGS. 12 to 16, and cutting them. It will be done. By overlapping and cutting the A section 17a and the A section 17b in FIG. 17, the chevron-shaped napkins shown in FIGS. 9 to 11C are obtained. As the material for the chevron-shaped absorbent body of the present invention, any material used as the absorbent body for subordinate absorbent articles can be used, and examples thereof include laminated pulp and absorbent paper.

The absorbent body of the present invention is suitable as an absorbent body for absorbent articles such as sanitary napkins, and is particularly suitable as an absorbent body for chevron-shaped napkins.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the chevron-shaped absorber of the present invention, FIG. 2 is a plan view thereof, and FIGS. 3A, 3B, and 3C are lines A-A' and B- in FIG. 2, respectively. It is a sectional view along B' and C-0. FIG. 4 is a perspective view of another embodiment of the chevron-shaped absorbent body of the present invention, and FIG. 5 is a plan view thereof. FIG. 6 is a perspective view of another embodiment of the chevron-shaped absorber of the present invention, FIG. 7 is a plan view thereof, and FIGS. 8A, 8B, and 8C are lines A-A in FIG. 2, respectively.
', BB and C-0. FIG. 9 is a perspective view of an embodiment of a pond with zero chevron absorbers according to the present invention, FIG. 10 is a plan view thereof, FIGS. 11A, 11B, and 11C.
The figures are lines A-A', B-B' and C in Figure 10, respectively.
-C' is a cross-sectional view. FIGS. 12 to 17 are explanatory diagrams for explaining the method for manufacturing the chevron-shaped absorbent core of the present invention. 11..."first absorber, 13..."
...Second absorber, 15...Third absorber, 1
7...Long sheet-like absorber, 17a, 17b...
...Cutting sheet. Girder I illustration 2 drawings. Box 3A figure still 3B scheme 3C scheme 4 scheme 5 figure rare 6 figure fine 7 figure 8A figure fine 8B figure rare 8C figure 9 rare l○ figure boat lIA figure rough liB figure digit lIC figure rarely illustrated Bow B diagram rough l4 diagram boat l5 diagram doro l6 younger brother l7 diagram

Claims (1)

[Scope of Claims] 1. A sheet-like absorbent body in which a part of one side in the length direction bulges out in the width direction to form a bulge portion, is made such that the directions of the bulges are opposite to each other, and A chevron-shaped absorbent body characterized in that the bulging portions are overlapped so that at least a portion of the bulges are overlapped. 2 Cut the long sheet-like absorbent body approximately at the center in the width direction so that peaks and troughs are repeated at a constant pitch in the length direction, and then cut this cut long sheet-like absorbent body into the peaks and troughs. A method for manufacturing a chevron-shaped absorbent body, which comprises continuously stacking the ridges and troughs so that the troughs and troughs match, and then cutting the absorbent body to an appropriate length in the longitudinal direction.