JPH0115601B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disposable diaper base and a method for manufacturing the same.

In general, disposable diapers (hereinafter simply referred to as diapers) are made by forming an absorbent layer of a required thickness using absorbent fibers such as pulverized pulp, which is then sandwiched between a top sheet (water-permeable upper layer material) and a back sheet (water-impermeable thin film). However, when worn, the side edge of the diaper is in the shape of an hourglass or deformed, with the part that is between the legs and the lower part of the body (inseam area) narrow and the waist part widened. An hourglass shape is used,
Absorbers (substrates) of such shapes are also used for such diapers.

Methods for forming an absorbent body with such a shape include (1) a method in which absorbent fibers are laminated (laminated) in advance so as to have the above shape; (2) a method in which absorbent fibers are stacked on the side of the absorbent fiber laminate (usually in the form of a band); A method of cutting and deleting the sides to obtain the above shape, (3) making multiple cuts in the side part of the absorbent fiber laminate and directing the part sandwiched between the two cuts towards the center of the laminate. There is a method of folding it into the above shape. However, with method (1) above, the finish on the sides of the substrate is messy, and the water-absorbing paper used as an auxiliary material cannot be applied properly.
Disadvantages include the need for separate equipment to form two layers of pine in the center; method (2) requires cutting of the side parts;
Disadvantages such as the large loss of the laminate due to removal (cutting loss) and the need for another device to reuse the loss, and the need for another device to form two layers of pine in the center; In addition, method (3) has disadvantages such as having many straight parts, making it difficult to manufacture curved or rounded products, and the laminate having no strength, making it difficult to fold and speeding up production. This method is not economically satisfactory as a method for forming absorbent bodies for diapers, which are strongly desired to be inexpensive.

The inventor of the present invention has conducted extensive research in order to find an economically satisfactory manufacturing method for diaper bases that does not have the above-mentioned drawbacks, and has found that by cutting strip-shaped absorbent bodies into specific shapes and overlapping them at specific positions. We have discovered that a diaper base of the above shape can be economically produced without cutting loss, and that a relatively expensive water-absorbing resin can be effectively distributed in the base by such a method, leading to the present invention. .

That is, the present invention: divides a strip-shaped absorbent body made of absorbent fibers and a water-absorbing resin into two by making wavy or zigzag cuts in the longitudinal direction, and the cut part is on the outside. The straight side parts of both are overlapped so that the peaks (wide width part) and valleys (narrow width part) of both waveforms or zigzag shapes correspond to each other, and cut in the width direction at the center of the wide width part. A disposable diaper base (first invention) characterized in that it has an hourglass shape or a modified hourglass shape; and a strip-shaped absorbent body made of absorbent fibers and water absorbent resin that is continuously fed is corrugated in the longitudinal direction. Make a cut in a wavy or zigzag shape; then, while continuously feeding the two divided absorbent bodies (parts), the relative position of the two is such that the cut part is on the outside and the wavy or zigzag peaks ( After moving so that the wide part) and the valley (narrow part) are in corresponding positions, the straight side parts of both are overlapped to form a band whose edges on both sides are wavy or zigzag; characterized by continuously manufacturing an hourglass-shaped or modified hourglass-shaped diaper base by cutting in the width direction at the center of the wide part of the body;
This is a method for manufacturing a disposable diaper base (second invention).

As the absorbent fibers constituting the absorbent body in the present invention, those commonly used in absorbent bodies for diapers can be used, and hydrophilic fibers, particularly fiber fibers such as natural fibers (pulp, cotton, wool, jute, etc.), Examples include semi-synthetic fibers (viscose rayon, acetate, etc.) and mixtures of these fibers. Among these, pulp, cotton, cotton waste, wool, viscose rayon, etc. are preferable.
Rayon, pulp and cotton are particularly preferred. Absorbent fibers come in various shapes such as staples, filaments, hollow fibers, crimped (bulky) threads, pulp, cotton, webs, sheets, mats, and fine fibers. can give. Among these, pulp-like ones and cotton-like ones are preferred. Absorbent fibers can be used as an absorbent material by pulverizing and/or opening them in a conventional manner, laminating them to the required thickness using a laminating machine (frac former or pine former), and combining them with a water absorbent resin. . In addition to air felt, we also use laminated paper cotton (multilayer crepe cellulose waxing), fluffed cellulose fibers, woven fabrics, non-woven fabrics, etc., and combinations of two or more of these (for example, on one or both sides of the absorbent fiber laminate). A combination of water-absorbing paper, filter sheet, non-woven fabric, etc.) can also be used.
Further, the absorbent fibers may be made into a laminate of two or more sheets using two or more laminators; the absorbent fibers may be made into a double layer by folding the side portions.

In the present invention, the absorbent body is made of absorbent fibers and water-absorbing resin. Usual water-absorbing resins can be used, and specific examples of such water-absorbing resins and methods for manufacturing absorbent bodies made of water-absorbing resins and absorbent fibers (mixing method, mixing ratio)
Examples include those described in Japanese Patent Application No. 167085/1985.

Furthermore, in addition to absorbent fibers and water-absorbing resins, a mixture of heat-fusible or soluble fibers can also be used as the absorbent body. Examples of such fibers and methods of manufacturing absorbent materials include, for example, Japanese Patent Application No. 1983-
Examples include those described in specification No. 103804.

The absorbent body used in the present invention may have a multilayer structure consisting of a mixed layer of absorbent fibers and a water-absorbing resin (and heat-fusible or soluble fibers, if necessary) and an absorbent fiber layer. Patent Application No. 6 of Patent Application No. 167085-1985 is an example of such a multilayer structure.
For example, the one shown in Figure 3 of Japanese Patent Application No. 103804/1983 is shown in Figure 3 of Japanese Patent Application No. 103804/1983. Particularly suitable for the present invention is one having a mixed layer of water-absorbing resin and absorbent fibers continuously or intermittently on one or both sides of the strip-shaped absorbent body, for example, as shown in FIG. a~h
This is shown in Such a multilayered structure can also be manufactured by the method disclosed in Japanese Patent Application No. 167085/1983 and Japanese Patent Application No. 103804/1982.

Moreover, instead of the above-mentioned mixed layer, a layer in which only a water-absorbing resin is continuously or intermittently dispersed and laminated on an absorbent fiber layer can also be used. The method of spraying is disclosed in Japanese Patent Application Laid-open No. 141099, 1983, and Japanese Patent Application Laid-Open No. 141099,
Examples include methods described in JP-A No. 151960 and Japanese Patent Application Laid-Open No. 56-60555. The amount of water absorbent resin to be sprayed is usually 5 to 100 g/ ^m2 , preferably 10 to 50 g/ ^m2 .

The water-absorbing resin may be sprayed on one or both sides of the absorbent fiber laminate 1P, as shown in Figure 1i; The laminate may be sprayed on or near one or both sides of the laminate, and one or both of the sides may be folded over to make it double, as shown in j' and k'; In addition, using two or more laminating machines, water absorbent resin is sprayed on the entire surface or one or both of the sides of one sheet of the absorbent fiber laminate, and absorbent fibers are further added on top of that. They may be laminated to form a strip-shaped absorbent body made of two or more absorbent fiber laminates and a water-absorbent resin as shown in FIG. 1l.

For those having the mixed layer, the side portions may be folded or the absorbent fiber laminate may have two or more layers in the same manner as described above.

The diaper base of the present invention comprises two (or more) absorbent sheets (absorbent fibers and water-absorbing resin) each having a half-hourglass shape or a half-deformed hourglass shape (an hourglass shape or a modified hourglass shape divided into two vertically). (consisting of the above) are overlapped with their straight side parts to form an hourglass shape or a modified hourglass shape as a whole, and such a base body is manufactured from a strip-shaped absorbent body as described below.

The width of the strip-shaped absorbent body used in the present invention is
It can be changed depending on the width of the waist part (the widest part) and the width of the inseam area (the narrowest part) of the target diaper base. The width X of the strip-shaped absorbent body can be expressed by the following formula.

X=W+y/2+z where W is the width of the waist part of the diaper base, y is the distance between the troughs of the wave or zigzag shape in the inseam area, and z is the width divided into two parts according to the invention. Indicates the width of the overlapped part of the absorbent body. The value of z is O<
It can be changed within the range of z≦X+y/2. z is usually 20 mm or more, preferably 70 to 250 mm (especially around 80 mm for children, and around 200 mm for adults). Preferably, the value of z is within the range of (y±40) mm. The width of the absorbent strip is usually 250 to 500 mm. (For children, it is around 300mm, for adults, it is around 300mm.
Preferably around 400mm. ) The thickness of the strip-shaped absorbent body can be varied depending on the required water absorption performance, but is generally 2 to 10 mm, preferably 3 to 6 mm.

The strip-shaped absorbent material that is continuously fed out from a stacking machine can be used as is, but it can be used as it is by compressing equipment (for example, embossing rolls, etc.).
This is preferable because it can be used after being lightly compressed with a press roll.

According to the present invention, the strip-shaped absorbent material is divided into two by making a wavy or zigzag cut in the longitudinal direction (particularly in the longitudinal center portion). In the present invention, the term "wavy or zigzag" is The concept includes not only normal waveforms (for example, FIG. 2 a, b, c) and zigzag shapes (FIG. 2 d), but also various modifications thereof (for example, FIG. 2 e, f). The waveform or zigzag wavelength (length from one peak to the next) (L in the diagram) is equal to the length of the diaper base, usually 300 to 750 mm (300 to 500 mm for children).
For adults it is 500-750mm). Waveform or zigzag amplitude (height difference between peaks and valleys) (A in the diagram)
is usually 20 to 100 mm, preferably 50 to 70 mm.
The angle between the hypotenuse (the middle part between the peaks and valleys) (in the case of a curve, its tangent) and the vertical center line (α, β in Figure 2) of the waveform or zigzag shape is usually 20 to 70°, preferably It is 30~50°.

A method of making a wave-shaped or zigzag-shaped cut in the band-shaped absorber includes a method of making the cut using a cutting device equipped with a blade having such a shape, such as a wave-shaped rotary cutter (wave diamond cutter);
Then, while continuously or intermittently feeding the absorbent strip, a cutting device such as a high-pressure water jet nozzle (pressure: e.g. 1500 to 2500 Kg/cm ² , nozzle diameter: e.g. 0.1 to 0.3 mm) is periodically orthogonally perpendicular to its traveling direction. An example of this method is to cut in a waveform or zigzag shape by moving the cutter. The latter is preferable because the shape and size (wavelength, amplitude) of the cut can be freely changed in conjunction with a computer or the like.

The wave-shaped or zigzag-shaped incisions are usually placed at the longitudinal center of the strip-shaped absorbent material; however, when two or more incisions are made to divide the absorbent material into three or more parts (sections),
It does not have to be the central part in the vertical direction. [For example, the second
Figure g. ] As shown in FIG. 3, the two absorbent bodies 1 and 1' separated by making cuts as described above have their cut portions 2 and 2' on the outside and have a wavy or zigzag shape. Mountain (wide part) 3,
3' and valleys (narrow width portions) 4, 4' are moved to corresponding positions, respectively, and their straight side portions 5, 5' are overlapped. In this case, the width z of the overlapped portion of the separated absorbers is shown in Figure 3 a and b.
As shown in FIG. 3c, the distance between the troughs of the wavy or zigzag shape in the crotch area may be smaller than y; it may be larger than y, as shown in FIG.

As shown in Fig. 4, the method for moving the absorbent body to such a position is to continuously feed the absorbent body 1, 1' divided into two parts, and then place the absorbent body on top of it diagonally to the direction of movement. One example is a method in which one of the absorbent bodies 1 is rotated once on the roll 6 using a placed roll 6 to move the absorbent body 1 relative to the other absorbent body 1'. As the roll used in the above method, a rubber roll, a Teflon roll, a silicon roll, a metal roll, etc. can be used. The diameter of the roll varies depending on the width of the absorber, the amplitude and wavelength of the waveform or zigzag shape, and the width z of the overlapping portion, but is usually 100 to 300 mm. In addition, instead of rotating the above-mentioned roll, the absorbent body 1 is rotated around an air layer (air roll) ejected from the inside of a cylinder using a cylinder having a large number of pores as shown in Fig. 4b. You can also do that. When rotating or moving on an air roll,
Since there is no friction and the absorbent body 1 can be moved in any direction, rotation and movement of the absorbent body 1 can be performed smoothly.

Also, as shown in Figure 4c, the roll is
It is also possible to use the book or more to move one of the absorbent bodies 1 (one revolution or an S-shape movement). The roll diameter in this case is usually
50-100mm, the spacing between rolls (pitch) is usually 100
~400mm. By increasing or decreasing the roll interval, the width z of the overlapping portion of the absorbers 1 and 1' can be freely changed.

Rotate one side of the absorber on the roll as above,
By moving it, its progress can be delayed by 1/2L or (1/2+n)L (n is an integer) and at the same time it can be moved by a predetermined distance (A+y) in the width direction.

In addition, two or more strip-shaped absorbent bodies are each cut into two parts by making cuts in the above-mentioned shape,
Absorbent bodies separated from different absorbent strips may be combined and stacked in a position as shown in Figure 3; also, as shown in Figure 2g, two (or more) A wavy or zigzag cut is made to divide the absorbent body into three (or more) parts, and the absorbent bodies 1 and 1' at both ends are overlapped with the peaks and valleys corresponding to each other. An absorbent body 1' or a superposition of these as shown in FIG. 3d can be manufactured. In these cases, the angles α and β shown in FIG. 1 can be different (for example, α is 48° and β is 42°).

Examples of belt-shaped absorbent materials include one made of a single laminate as shown in Figure 1 i, one with both sides folded in as shown in j', and one in which one side part is folded in as shown in k'. When a material consisting of two laminates, such as a material or material 1, is cut and overlapped, a cross section (wide width) as shown in FIG. part) is obtained.

The absorbers 1 and 1' whose relative positions have been moved as described above are stacked one on top of the other as shown in FIG. A diaper base is obtained. The cutting position may be in the middle of the wide part, but slightly from the middle (for example, 0-100 mm, preferably 5-10 mm).
The diaper base may be cut at positions shifted by 20 mm, more preferably 10 to 15 mm, to make the length of the front part (from the crotch area to the front end) and the length of the rear part (from the crotch area to the rear end) different.

The length of the diaper base obtained in this way is usually 300 to 750 mm (300 to 500 mm for children and 300 to 500 mm for adults).
500-750mm), waist width is usually 200-450mm
Preferably 250-300mm, width of inseam area usually 50-300mm
300mm preferably 70-250mm (70-120mm for children,
200-250mm for adults), the front length is usually 120-250mm
400mm (preferably 130-250mm for children and 220-350mm for adults), rear length usually 150-475mm
(Preferably 150~270 for children, 250~250 for adults.
It is 395mm.

The superimposed absorbent body as described above according to the invention can be heated and/or compressed if necessary. Examples of the heating method include a method of heating without compression using a hot air oven or a suction band heat treatment machine, and a method of heating and compressing using a hot press, heat roll, heat embossing roll, etc. Heating and/or compression may be performed before or after the above-mentioned cutting, may be performed at the same time as cutting, or may be performed when the diaper base is combined with the top sheet and the back sheet to produce a product. good.

The diaper base obtained by the present invention can be manufactured into a product by combining it with a top sheet and a back sheet in the same way as ordinary disposable diapers (paper diapers). As the top sheet (water-permeable upper layer material), any flexible, soft-touch porous paper or non-woven web can be used, and as the back sheet (water-impermeable thin film), a flexible polysheet can be used.
Specific examples of these include JP-A-50-90439;
Examples include those described in JP-A No. 51-53939.

The top sheet may be superimposed after manufacturing the diaper base of the present invention, or during its manufacture (when stacking absorbent bodies or before cutting), or may be stacked before manufacturing (when stacking absorbent strips or before cutting). (after that) may be superimposed. The backsheet is usually superimposed after the diaper base is manufactured.

The top sheet and back sheet, like normal ones, are somewhat wider (usually 15 to 70 mm, preferably 20 to 40 mm) than the diaper base (absorbent core), and have any fixing means beyond the edge of the absorbent core. It is fixed in place. The fixing means may be the same as conventional ones, such as those described in JP-A-50-90439.

Further, the diaper can be provided with side flaps having elastic members on the side edges thereof, thereby preventing leakage from the gap between the legs and the diaper. Examples of such elastic members and side flaps include those described in JP-A-50-90439.

Examples of the diaper base of the present invention and the apparatus used to manufacture diapers using the same are shown in FIGS. 6 and 7. In FIG. 6, while continuously feeding rayon paper (tissue) 7 onto vacuum box 8, pulp 9 is scraped off from pine former 10 by garnet cylinder 11, and at the same time, water-absorbing resin is applied to a part of the falling range. 12 to spray nozzle 13
This is sprayed intermittently to form a pulp laminate 15 having a mixture layer 14 of water-absorbing resin and pulp on one side; after being lightly compressed with an embossing roll 16, the longitudinal center of the pulp laminate 15 is formed. A wave-shaped or zigzag-shaped incision is made in the portion using a high-pressure water jet nozzle 17 to separate it into two absorbers 1 and 1'; one of the absorbers 1 is rotated on two folding rollers 6 and moved relative to each other. Lay it on the other 1' of the absorbent body; then, after pressing, use a mat cutter 18.
The diaper base 19 of the present invention is manufactured by cutting near the center of the wide portion. Further, in FIG. 7, while continuously feeding rayon paper (tissue) 7 onto vacuum box 8, pulp 9 is scraped off from pine former 10 by garnet cylinder 11 to form pulp laminate 15; The water-absorbing resin 12 is spread and laminated on the side part using the gravure roll (spreading device) 20; then, it is lightly compressed with the embossing roll 16, and then the longitudinal center part is cut with the wave diamond cutter 21 to form two layers. Divided into absorbers 1 and 1'; one side 1 is folded with two folding rollers 6
The upper part is rotated and moved relatively to overlap the other 1' of the absorbent body; then, after pressing, the diaper base 19 of the present invention is manufactured by cutting near the center of the wide part with a mat cutter 18. On the lower side of the diaper base 19 obtained in this way, a poly film 21 coated with hot melt adhesive on the end portions and side portions using a hot melt nozzle 22, and a nonwoven fabric 23 on the upper side are continuously fed and overlapped. A diaper can be manufactured by combining; sealing with side seals 24 and end seals 25; and cutting the end portions. In the above, a flak former may be used instead of a pine former; the water-absorbing resin may be sprayed or sprinkled continuously or intermittently, and may be applied to one side of the pulp laminate. It may be sprayed or dispersed, or it may be sprayed or dispersed on both sides; one or both sides of the strip-shaped absorbent body may be folded in.

The diaper base and the manufacturing method thereof of the present invention have the following effects: (1) An hourglass-shaped or modified hourglass-shaped diaper base can be easily manufactured from a band-shaped absorbent body without producing cutting loss. (2) The area near the longitudinal center line of the diaper, where high water absorption performance is required, is thicker than the side portion of the waist portion, where high water absorption performance is not required, which is advantageous in terms of water absorption capacity. (3) By changing the shape of the wavy or zigzag notches, the shape of the diaper base can be changed in various ways. (4) By using an absorbent fiber layer that has a continuous or intermittent layer of water-absorbing resin or a mixture of water-absorbing resin and absorbent fibers on the sides of the strip-shaped absorbent body, high water-absorbing capacity can be achieved. Since it is possible to obtain a diaper base that contains water-absorbing resin only in the longitudinal centerline portion, it is ideal in terms of water-absorbing ability and no waste of water-absorbing resin (which is more expensive than absorbent fibers). It is. (5) By the method of the present invention (second invention), the desired diaper base can be manufactured continuously from a laminating machine (fiber stacking machine) at high speed, easily, and extremely economically, allowing for mass production. Are suitable. (6) Even when excessive tension is applied during wear, only the overlapped portions of the absorbent body will shift, and the absorbent body will not be stretched and become abnormally thin.

The present invention will be explained below with reference to Examples.

Example 1 Using a device as shown in Fig. 7, pulverized pulp was laminated on water-absorbing paper by a stacking machine (mattuformer), and a strip-shaped absorbent material (width 310 mm, thickness) was continuously fed out. length 5mm, speed 100m/
10 to 300 mesh per minute)
The material is continuously spread and laminated using the apparatus described in the publication (spraying amount: 20 g/m ² , width: 100 mm) to form a strip-shaped absorbent body as shown in FIG. 1i. Next, this strip-shaped absorbent body made of water-absorbent resin and absorbent fibers is continuously fed and compressed with an embossing roll to the extent that the water-absorbent resin and absorbent fibers do not fly or lose their shape, and are then passed through a wave die cutter. Using
mm, angle between hypotenuse and longitudinal centerline α = β =
Make a 40°) cut. Next, while continuously feeding the two divided absorbent bodies 1 and 1', the fourth
As shown in the figure, two rolls (diameter 100 mm,
Length 300mm) 6 makes one rotation of the absorbent body 1 on the roll, delayed by 1/2L, and stacks it on the other absorbent body 1' as shown on the right side of Fig. 4. An hourglass-shaped diaper base cut in the width direction at the center and having a water-absorbing resin layer at the center as shown in Figure 8 (width at waist W = 280 mm, width at inseam area 120 mm, length 400 mm) was manufactured.

Example 2 Using the device shown in Figure 6,
The pulverized pulp is dropped by the stacking machine described in Example 2 of No. 54-16908, and a water-absorbing resin [Sunwet IM-300 manufactured by Sanyo Chemical Industries, Ltd.] pulverized into 30 to 145 meshes is intermittently applied only to a part of the laminated area. (spraying amount: 40 g/m ² ) to form a strip-shaped absorbent body [width 310 mm, thickness 5mm, width of mixed layer part 100mm, length 200mm, thickness 5mm;
Forming a gap of 200 mm between the mixed layers,
The strip-shaped absorbent material continuously sent out from the stacking machine (at a speed of 100 m/min) is compressed with embossing rolls to the extent that it does not lose its shape, and then compressed into the longitudinal center using a high-pressure water jet nozzle linked to a microcomputer. A modified zigzag cut (width A = 90 mm, wavelength L = 400 mm, angle α = β = 40°) as shown in Fig. 2e is made, and then the absorber 1, 1' is divided into two parts. were moved in the same manner as in Example 1, overlapped, and cut in the width direction at the center of the wide width part to obtain a diaper base with a modified hourglass shape as shown in FIG. 9 (waist part width W = 300 mm,
The width of the inseam area was 120 mm and the length was 400 mm).

[Brief explanation of drawings]

Figures 1 and 4 are perspective views, Figures 2, 3, 6b, 7b, 8a, and 9a are plan views, and Figures 5 and 6a. , FIG. 7a, FIG. 8b, and FIG. 9b are cross-sectional views. In the figure, a mixed layer of absorbent fibers and water absorbent resin, 1 and 1' are absorbent bodies, 2 and 2' are cut parts, 3 and 3' are wide parts, 4, 4' is the narrow part,
5 and 5' indicate straight portions, and 6 indicates a roll.

Claims (1)

[Scope of Claims] 1. A band-shaped absorbent body made of absorbent fibers and an absorbent resin, which is divided into two by cutting in a wavy or zigzag shape in the longitudinal direction, and the cut portion is on the outside and both are separated. The straight side parts of both are overlapped so that the peaks (wide part) and valleys (narrow part) of the waveform or zigzag shape correspond to each other, and the wide part is cut in the width direction at the center to form an hourglass or zigzag shape. A disposable diaper base characterized by having a deformed hourglass shape. 2. The diaper base according to claim 1, wherein the absorbent fibers are made of pulverized pulp, paper cotton, cotton, rayon, or a combination thereof. 3. The strip-shaped absorbent body has a highly absorbent layer made of a water-absorbing resin and absorbent fibers on the side portions;
A diaper base according to claim 1 or 2. 4. The diaper base according to claim 1, 2 or 3, wherein the position where the incision is made is at the longitudinal center of the strip-shaped absorbent body. 5 A strip-shaped absorbent body made of absorbent fibers and a water-absorbing resin is fed continuously, and a wavy or zigzag cut is made in the longitudinal direction; then, while continuously feeding the two separated absorbent bodies, , after moving the relative positions of both so that the cut part is on the outside and the peaks (wide part) and valleys (narrow part) of both waveforms or zigzag shapes are in corresponding positions; The straight side parts are overlapped to form a band-like body with wave-shaped or zigzag-shaped edges on both sides; and by cutting the wide-width part of the band-like body in the width direction at the center, a diaper base having an hourglass shape or a modified hourglass shape is formed continuously. A method for manufacturing a disposable diaper base, which is characterized in that it is manufactured according to 6. By rotating one of the two divided absorbent bodies once over one or more rolls placed diagonally to the direction of movement of the divided absorbent body, the relative position of the absorbent body can be moved. The manufacturing method according to claim 5, which is carried out. 7. The manufacturing method according to claim 5 or 6, wherein a cut is made in the longitudinal center portion of the strip-shaped absorbent body.