JP2020188880A - Manufacturing method of inner pad type absorbent article - Google Patents

Abstract

To provide a manufacturing method for relatively inexpensively manufacturing an absorbent article which is thin in a thickness, suppressed in the lowering of a gel block and an absorption speed, and favorable in softness and a skin touch feeling while carrying a large quantity of high-absorbent polymer particles.SOLUTION: A manufacturing method of an absorbent article 1 includes an absorber forming process, a thermal fusion process, a cut and separation process, a direction adjustment process, a position adjustment process, a final molding process and a final product forming process. In a fusion line in the thermal fusion process, longitudinal fusion parts substantially parallel with a longitudinal direction of one piece of a continuous absorber are alternately arranged in positions which are separated from each other in left and right directions at equal intervals from a center line of a width direction of one piece of the continuous absorber at the same lengths at left and right sides in the width direction, and an inclination fusion part is arranged in which a front end and a rear end of the fusion part which are arranged back and forth in the longitudinal direction while adjoining each other, being lines in oblique directions with respect to the longitudinal direction are connected to each other.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for producing an inner pad type absorbent article.

Inner pads used in combination with tape-type diapers are required to have a larger absorption amount for the purpose of reducing the number of replacements due to the labor shortage of care workers in recent years, and rewetting is required so that the wearer does not feel uncomfortable. Good things are required.

In order to meet such demands, the amount of super absorbent polymer particles used among the fluff pulp and super absorbent polymer (hereinafter, also referred to as SAP) particles, which are widely used as absorbents for disposable paper diapers, is used. There are ways to increase it. However, since there is an upper limit to the amount of highly absorbent polymer particles that can be supported inside a certain volume of fluff pulp between fibers, fluff pulp is used when the amount of highly absorbent polymer particles above a certain level is provided inside the absorber. Will increase the amount used. As a result, the thickness of the absorber is increased, and as a result, the thickness of the absorbent article is also increased.

In order to avoid this problem, a liquid-permeable non-woven fabric sheet or the like is used as a method of supporting a large amount of highly absorbent polymer particles inside the absorber while keeping the absorber thin. A method has been proposed in which a highly absorbent polymer is supported on one surface of a non-woven fabric or between a plurality of non-woven fabrics by an adhesive or heat-sealing means and used as a part or all of the absorber. However, if the highly absorbent polymer is present at a high density and near the surface of the disposable diaper on the side in contact with the skin, there is a drawback that gel block occurs and the absorption rate is lowered. Therefore, for example, as described in Patent Document 1, many proposals have been made to devise the arrangement of the highly absorbent polymer. However, when the amount of the adhesive is increased, there are also problems that the sheet itself becomes hard and the wearing feeling including the touch becomes worse. In addition, there is a limit to the amount of the highly absorbent polymer that can be supported on the surface of the non-woven fabric using the adhesive.

Therefore, in recent years, it has been reported that the absorber is composed of acetate tow and a highly absorbent polymer as an absorber having a certain degree of thinness, avoiding gel block and decrease in absorption rate, and having good softness and texture. The apparatus disclosed in Patent Document 2 and Patent Document 3 shows a method for producing a new absorber in which long-fiber acetate tow is opened in a mat shape and highly absorbent polymer particles are uniformly supported therein. ing. The absorber produced by this device is characterized in that it is flexible and can increase the loading rate of the highly absorbent polymer.

Japanese Unexamined Patent Publication No. 2004-329664 JP-A-2018-3205 JP-A-2018-59239

However, in order to deform the underbody part, which is often seen in the absorbers of conventional absorbent articles, into a thin hourglass shape, it is necessary to cut a part of the underbody part of the rectangular absorbent body. there were. In addition, it is necessary to cut in the same way to provide a slit in order to prevent a decrease in the absorption rate, and in these methods, expensive highly absorbent polymer particles are present in the portion to be cut and removed, resulting in loss in manufacturing cost. There remained an economic problem that there were many.

The present invention has been made in view of such circumstances, and is an absorbent article that is thin, has little decrease in gel block and absorption rate, and has good softness and texture while carrying a large amount of highly absorbent polymer particles. It is an object of the present invention to provide a manufacturing method for manufacturing the particles at a relatively low cost.

The inventor of the present invention has conducted diligent research in view of the above problems. As a result, the method for producing the absorbent article is composed of an absorbent body forming step, a heat fusion step, a cutting separation step, a direction adjusting step, a position adjusting step, a final molding step and a finished product forming step, and is fused in the heat fusion step. We have found that the above problems can be solved by making the landing line a predetermined structure, and have completed the present invention. Specifically, the present invention provides the following.

(1) In the first aspect of the present invention, the acetate tow is opened by air to form an absorber core by supporting highly absorbent polymer particles, and then absorbed by a water-permeable and thermoplastic non-woven fabric. An absorber forming step of forming one continuous absorber by wrapping the entire body core, and at positions equally spaced to the left and right in the width direction from the widthwise center line of one continuous absorber. Longitudinal fusion sections substantially parallel to the longitudinal direction of one continuous absorber are provided alternately on the left and right sides in the width direction with the same length, and are provided adjacent to the front and rear ends of the longitudinal fusion section in the longitudinal direction. A heat fusion step of forming a series of fusion lines by providing an inclined fusion portion which is a line oblique to the longitudinal direction at the rear end of the longitudinal fusion portion in front, and along the fusion line. A cutting and separation step of cutting one continuous absorber and separating the separated continuous absorber into a pair of continuous absorbers facing each other in the width direction, and a pair separated by the cutting and separating step. A direction adjusting step of adjusting the direction of a pair of continuous absorbers so that the concave-convex shapes formed of the continuous absorbers facing inward in the width direction each face outward in the width direction, and a direction adjusting step obtained by the direction adjusting step. In the position adjustment step of adjusting the position of the concave-convex shape of the pair of continuous absorbers in the longitudinal direction and aligning the phases so that the convexes and the concaves are aligned in the same phase in the longitudinal direction, and the position adjustment step. The obtained pair of continuous absorbers are separated by straight lines provided at regular intervals in the longitudinal direction at each outward convex portion, and are paired on the left and right and are hourglass-shaped. A pair of left and right first absorbers obtained in the final molding step on the final molding step of obtaining one absorber and an hourglass-shaped second absorber composed of a fluff and highly absorbent polymer particles laminated on a back sheet. A method for producing an absorbent article, which comprises a finished product forming step of forming an absorbent article by laminating the absorbent body, laminating the three-dimensional gather and the top sheet, and then separating them at regular intervals. Is.

(2) A second aspect of the present invention is the method for producing an absorbent article according to (1), wherein the direction adjusting step inverts a pair of separated continuous absorbers outward in the width direction. The position adjusting step includes a step of causing the phase of the continuous absorber of at least one of the pair of separated continuous absorbers to be adjusted by passing through a roll installed at the upper part and / or the lower part of the traveling position. It is characterized by including a step of performing the above.

(3) A third aspect of the present invention is the method for producing an absorbent article according to (1), wherein the direction adjusting step obtains one continuous absorber of a pair of continuous absorbers. It comprises a step of moving the other continuous absorber row to the opposite side, and the position adjusting step includes a step of adjusting the phase according to the distance for the movement.

(4) The fourth aspect of the present invention is the method for producing an absorbent article according to any one of (1) to (3), wherein in the finished product forming step, a pair of left and right first absorbers are used. , It is characterized in that it is arranged at an interval of 10 mm or more and 30 mm or less in the width direction.

Therefore, according to the method for producing an absorbent article of the present invention, an absorbent article which is thin, has little decrease in gel block and absorption rate, and has good softness and texture while supporting a large amount of highly absorbent polymer particles is compared. It is possible to provide a manufacturing method for manufacturing at a low cost.

It is a top view of the absorbent article seen from the body side surface in the manufacturing method of the absorbent article of this invention. It is sectional drawing of the straight line XX'in FIG. It is sectional drawing which shows the heat fusion | heat fusion | cutting separation process of the 1st absorber in the manufacturing method of the absorbent article of this invention. It is a figure which shows the flow from the absorber forming process of the first absorber to the final molding process in the manufacturing method of the absorbent article of this invention. It is a figure which showed the detail of the fusion | fusion line in the heat fusion process of the 1st absorber in the manufacturing method of the absorbable article of this invention.

Hereinafter, the method for producing the absorbent article 1 according to the embodiment of the present invention will be described in detail, but these are listed for the purpose of exemplification and do not limit the present invention. The same elements are numbered the same throughout the description of the embodiment.

In the description of the present specification, the longitudinal direction is a direction extending in front of and behind the wearer when the absorbent article 1 is worn, and is a direction indicated by Y in the drawing. Further, the width direction is a direction laterally or orthogonal to the longitudinal direction, and is a direction indicated by X in the drawing. Further, in the present specification, the body-side surface refers to a surface that comes into contact with the wearer's skin when the absorbent article 1 is worn or a surface that comes into contact with the wearer's skin when the absorbent article 1 is worn. The side surface is the surface opposite to the body side surface, and is the surface that comes into contact with the wearer's clothing when the absorbent article 1 is worn or the side that comes into contact with the wearer's clothing when the absorbent article 1 is worn. Refers to the surface.

<Absorbent article>
Regarding the method for producing the absorbent article 1 according to the embodiment of the present invention, the absorbent article 1 may be an absorbent article 1 such as a pants-type disposable diaper or a tape-stopping disposable diaper.
FIG. 1 is a plan view of the absorbent article 1 as viewed from the body side surface in the method for producing an absorbent article of the present invention, and FIG. 2 is a cross-sectional view of a straight line XX'in FIG. As shown in FIGS. 1 and 2, the absorbent article 1 has a liquid-permeable top sheet 10 arranged on the body side surface and a liquid-impermeable top sheet 10 facing the top sheet 10 and arranged on the clothing side surface. Alternatively, a liquid permeable back sheet 20 and a first absorber 30 and a second absorber 31 arranged between the top sheet 10 and the back sheet 20 are provided. As a result, the first absorber 30 and the second absorber 31 have a structure sandwiched between the top sheet 10 and the back sheet 20. The top sheet 10 and the back sheet 20 may be bonded to each other by an adhesive, heat fusion, or the like.

[Top sheet]
In the method for producing the absorbent article 1 according to the embodiment of the present invention, the top sheet 10 used for the absorbent article 1 allows the body fluid to quickly pass through the first absorber 30 and the second absorber 31. Yes, it is arranged so as to face the back sheet 20 with the first absorber 30 and the second absorber 31 interposed therebetween. Since the top sheet 10 is a sheet that comes into contact with the skin, it is preferably a hydrophilic non-woven fabric that has a soft feel and does not irritate the skin. Examples of the hydrophilic non-woven fabric include thermal-bonded non-woven fabrics such as air-through non-woven fabrics, spunlaced non-woven fabrics, spunbonded non-woven fabrics, and open polyethylene films using synthetic fibers such as polypropylene and polyethylene, recycled fibers such as rayon, and natural fibers such as cotton. An open film, a foamed film such as urethane foam, or the like can be used, and from the viewpoint of breathability and touch when worn, it is preferable to use a thermal bond non-woven fabric such as a hydrophilic air-through non-woven fabric or a spun bond non-woven fabric.

The basis weight of the top sheet 10 is preferably 18 g / m ² or more and 40 g / m ² or less from the viewpoint of workability and strength. In addition, lotions, antioxidants, anti-inflammatory components, pH adjusters, antibacterial agents, moisturizers and the like may be applied to the top sheet 10 in order to reduce irritation to the skin.

[Backsheet]
In the method for producing an absorbent article 1 according to an embodiment of the present invention, the back sheet 20 used for the absorbent article 1 is a liquid-impermeable sheet material, and the first absorber 30 and the second absorber 31 Is placed so as to face the top sheet 10. As the back sheet 20, a sheet material using a thin plastic sheet such as a polyethylene sheet or a polyethylene laminated non-woven fabric can be used. In addition, it may have moisture permeability to prevent stuffiness.
The basis weight of the back sheet 20 is preferably 15 g / m ² or more and 40 g / m ² or less from the viewpoint of workability and strength.

[Absorber]
In the method for producing an absorbent article 1 according to an embodiment of the present invention, the absorbers used in the absorbent article 1 are a pair of left and right absorbers, an hourglass-shaped first absorber 30, and an hourglass-shaped second absorber. It is composed of two types of absorbers, the absorber 31. The first absorber 30 and the second absorber 31 contain an absorbent fiber as a base material and a highly absorbent polymer, while the first absorbent body 30 contains acetate tow as an absorbent fiber and is second absorbed. The body 31 contains a fluff obtained by opening fluff pulp as an absorbent fiber. Acetate tow is a fiber bundle of diacetate fiber made from cellulose acetate having a degree of substitution of hydroxyl groups of about 2.5, and the acetate tow used in the present invention is the same as that used in a cigarette filter. it can.
Examples of the fluff pulp include wood pulp (for example, coniferous bleached kraft pulp (N-BKP) such as Southern pine and Douglas fur), synthetic fiber, polymer fiber, non-wood pulp, etc. deflated into cotton. Can be done.
The absorbent fiber of the first absorber 30 should have a basis weight of 40 g / m ² or more and 100 g / m ² or less so as not to impair the absorption performance and touch of each of the first absorber 30 and the second absorber 31. Preferably, the absorbent fiber of the second absorber 31 has a basis weight of 150 g / m ² or more and 250 g / m ² or less.

The SAP used for the first absorber 30 and the second absorber 31 is not particularly limited as long as it can absorb body fluids and prevent backflow, and is composed of sodium polyacrylate, polyaspartate, ( Those formed from materials such as a starch-acrylic acid) graft copolymer, a (acrylic acid-vinyl alcohol) copolymer, a (isobutylene-maleic anhydride) copolymer and a saponified product thereof can be used. Among these, sodium polyacrylate-based copolymers are preferable from the viewpoint of the amount of absorption per mass. The SAP amount of the first absorber 30 is preferably 100 g / m ² or more and 400 g / m ² or less in terms of basis weight so as not to impair the absorption performance and touch of each of the first absorber 30 and the second absorber 31. The content is preferably 2 times or more and 5 times or less the weight of the acetate tow. The SAP amount of the second absorber 31 is preferably 70 g / m ² or more and 125 g / m ² or less, and preferably 15% by mass or more and 50% by mass or less.

FIG. 3 is a cross-sectional view showing a heat fusion step and a cutting separation step of the first absorber 30. In the first absorber 30 and the second absorber 31, the form of the absorbent fiber and SAP is preferably the form of a mat formed by mixing SAP particles in the absorbent fiber. Further, the first absorber 30 is wrapped in the carrier sheet 50 for the purpose of preventing leakage of SAP particles and stabilizing the shape.
As for the second absorber 31, a carrier sheet 51 is used for the purpose of transporting in the manufacturing process and preventing leakage of SAP, and is preferably arranged between the second absorber 31 and the back sheet 20 as shown in FIG. Further, as shown in FIGS. 3 (a) to 3 (c), the carrier sheet 50 and the acetate tow are integrated and fixed at one side of the first absorber 30 at the fusion zone 60. The fusion treatment will be described in detail in the method for producing the absorbent article 1 described later.
The base material of the carrier sheet 50 is not particularly limited as long as it is a non-woven fabric having water permeability and thermoplasticity. The base material of the carrier sheet 51 is not particularly limited as long as it is a material that does not leak SAP, and examples thereof include tissue, absorbent paper, and air-laid non-woven fabric. In the carrier sheet 50 and the carrier sheet 51, the respective base materials may be the same or different, and the wrapping method when wrapping the first absorber 30 in the carrier sheet 50 is particularly limited. is not.

The basis weight of the first absorber 30 is preferably 180 g / m ² or more and 500 g / m ² or less, and the basis weight of the second absorber 31 is 180 g / m ² or more and 375 g / m ² or less. Is preferable. By setting the basis weights of the first absorber 30 and the second absorber 31 within the above ranges, the absorbent article 1 has excellent absorbency and can effectively prevent the leakage of body fluid.
Further, it is preferable that the first absorber 30 is arranged with an interval L in the width direction. At this time, the interval L is preferably 10 mm or more and 30 mm or less, and more preferably 15 mm or more and 25 mm or less. By arranging the pair of first absorbers 30 at intervals L, the absorbent article 1 having a slit portion capable of directly feeding the body fluid to the second absorber 31 can be obtained.

[Three-dimensional gather]
In the method for producing an absorbent article 1 according to an embodiment of the present invention, in order to prevent lateral leakage of body fluid excreted by the user on the body side surface of the absorbent article 1, along the longitudinal direction of the absorbent article 1. A pair of three-dimensional gathers 40 having an elastic member for three-dimensional gathers and a three-dimensional gather sheet may be provided. It is preferable that the three-dimensional gather 40 is fixed to the back sheet 20 at the widthwise end (fixed end) of the absorbent article 1, and the free end side is folded in half at the end. The elastic member for three-dimensional gathers is preferably sandwiched between two-folded three-dimensional gather sheets on the free end side. As a result, the three-dimensional gather 40 has an upright property and can be deformed according to the wearer's body shape.

As the elastic member for three-dimensional gather, for example, polyurethane thread, strip-shaped polyurethane film, synthetic rubber, thread-shaped or strip-shaped natural rubber, or the like can be used, and thread-shaped, string-shaped, or flat-shaped members can be appropriately used. .. Further, as the three-dimensional gather sheet, a water-repellent or impermeable non-woven fabric formed of hydrophobic fibers, for example, a spunbonded non-woven fabric, a melt-blown non-woven fabric, a composite non-woven fabric in which spunbond / melt-blown / spunbond is laminated, or the like is used. Will be done. The basis weight of the three-dimensional gather sheet is preferably 10 g / m ² or more and 25 g / m ² or less.

<Manufacturing method of absorbent articles>
The method for producing the absorbent article 1 includes an absorber forming step, a heat fusion step, a cutting separation step, a direction adjusting step, a position adjusting step, a final molding step, and a finished product forming step, and undergoes a series of steps. The absorbent article 1 can be manufactured. FIG. 4 shows the flow from the absorber forming step to the final molding step. Hereinafter, each step will be described in detail.

[Absorbent formation step]
In the absorber forming step, as shown in FIGS. 3 (a) and 4 (a), the acetate tow is opened by air and the highly absorbent polymer particles are supported to form the absorber core 301. By wrapping the entire absorber core 301 with the carrier sheet 50, which is a water-permeable and thermoplastic non-woven fabric made of a thermoplastic resin, one continuous absorber 32 is formed.
In the subsequent steps, the processing in each step is performed while running one continuous absorber 32 in the longitudinal direction.

[Heat fusion process]
In the heat fusion step, as shown in FIG. 4A, the uneven fusion line C1 is formed. The fusion line C1 is located at a position separated by a length C3 on a width parallel line from the width direction center line of one continuous absorber 32, and is substantially parallel to the longitudinal direction of one continuous absorber 32. The attachment portions are provided alternately on the left and right sides in the width direction with a length of C4, and the front and rear ends of the longitudinal fusion portions provided adjacent to the front and rear in the longitudinal direction are connected by diagonal lines with respect to the longitudinal direction. A slanted fused portion is provided with a length C5 in the longitudinal direction.
FIG. 5 shows the details of the fusion line C1. Hereinafter, the fusion line C1 will be described in more detail with reference to FIG. 5. The line YY'in FIG. 5 is a center line bisected in the width direction of one continuous absorber 32 (hereinafter,). , Called the widthwise centerline). A longitudinal fused portion 61 having a length C4 is provided at a position substantially parallel to the center line in the width direction and separated from the center line in the width direction on one side in the width direction (upper part of the center line in the width direction) by the length C3. Further, a longitudinal fusion splicer 62 having a length C4 is provided at a position substantially parallel to the center line in the width direction and away from the center line in the width direction on the other side in the width direction (lower part of the center line in the width direction). .. The longitudinal fusion portions 61 and 62 are alternately arranged at intervals of length C5 in the longitudinal direction. Further, an inclination of length C5 connecting the front end of the longitudinal fusion splicer 61 and the rear end of the longitudinal fusion splicer 62 adjacent to the front of the longitudinal fusion splicer 61 with a line oblique to the longitudinal direction. A fusing portion 63 is provided. Further, an inclination of length C5 connecting the rear end of the longitudinal fusion splicer 61 and the front end of the longitudinal fusion splicer 62 adjacent to the rear of the longitudinal fusion splicer 61 with a line oblique to the longitudinal direction. A fusion section 64 is provided. By continuously arranging the longitudinal fusion portions 61 and 62 and the inclined fusion portions 63 and 64 in this way, one continuous uneven fusion line C1 is formed.
At this time, the length C3 is preferably 15 mm or more and 20 mm or less, the length C4 is preferably 100 mm or more and 190 mm or less, and the length C5 is preferably 10 mm or more and 40 mm or less. By setting the length of each portion of the fusion line C1 within the above range, the hourglass-shaped first absorber 30 which is thin and easily fits the wearer while supporting a large amount of highly absorbent polymer particles and the first absorber 30 thereof. An absorbent article 1 comprising the above can be obtained.

If the fusion line C1 is not provided before the cutting separation step described later, that is, if the fusion treatment is not performed before cutting, the absorber is exposed at the cut end, and the SAP particles are exposed in the subsequent steps. There is a risk of falling off. As shown in FIGS. 3B and 3C, the carrier sheet 50 encloses the acetate tow and SAP particles, and the fusing portion 60 on one side of the absorber allows the carrier sheet 50 and the acetate toe to form. By being integrated and fixed, there is an advantage that one continuous absorber 32 can be easily controlled even in the subsequent steps.
Further, by fixing by the fusing portion 60 in the step, there is an advantage that one continuous absorber 32 can be easily cut in the cutting and separating step described later.

[Cut separation process]
As shown in FIG. 4B, one continuous absorber 32 is cut along the fusion line C1, and the separated absorber becomes a pair of continuous absorbers 33 facing each other in the width direction.

[Direction adjustment process]
As shown in FIG. 4B, in the pair of continuous absorbers 33 separated in the above-mentioned cutting and separating step, the unevenly shaped cut portions are formed so as to face each other in the width direction. In the direction adjusting step, the direction is adjusted so that the cut portions of the pair of continuous absorbers 33 face outward in the width direction as shown in FIG. 4C. At this time, it is preferable that the direction adjustment includes a step of reversing the pair of separated continuous absorbers 33 in the direction R indicated by the arrow in FIG. 4B, that is, outward in the width direction.

[Position adjustment process]
The positions of the concave-convex shapes of the pair of continuous absorbers 33 obtained in the above-mentioned direction adjusting step are phase-adjusted in the longitudinal direction, and as shown in FIG. 4D, the convexes and the concaves are the same in the longitudinal direction. Match the phase so that it is aligned with the phase. At this time, as a process performed to adjust the position, as shown in FIG. 4 (e), at least one of the pair of continuous absorbers 33 is installed at the upper part and / or the lower part of the traveling position. It is preferable to include a step of performing phase adjustment via the roll 70. By this processing, it is possible to adjust the phase on the same line without adjusting the feed rate of only one of the pair of continuous absorbers 33 to another line. Regarding the roll 70, only one of the pair of continuous absorbers 33 may be passed through, or each of the pair of continuous absorbers 33 may be passed through the rolls 70 at different heights (distances of paths). Good.
In the above-mentioned direction adjustment step and position adjustment step, as shown in FIG. 4 (f), one of the continuous absorbers 33 of the pair of continuous absorbers 33 is transferred to the other continuous absorber by the roll 70. It is also possible to include a step of moving to the opposite side of the row and a step of adjusting the phase by adjusting the distance of the path for the movement (the movement intentionally delays one absorber). is there. By this process, the direction adjusting step and the position adjusting step can be performed in one process using the same roll 70, which leads to speeding up of the process.

[Final molding process]
As shown in FIG. 4D, a pair of continuous absorbers 33 obtained in the above-mentioned position adjusting step are provided in a straight line at regular intervals in a direction substantially perpendicular to the longitudinal direction in each outward convex portion. By separating at C2, a pair of left and right first absorbers 30 and an hourglass type are obtained. At this time, the length of the straight line C2 is preferably 70 mm or more and 90 mm or less, and the distance between adjacent straight lines C2 is preferably 220 mm or more and 460 mm or less.

[Completed product forming process]
A pair of left and right first absorbers 30 obtained in the above-mentioned final molding step are laminated on the second absorber 31 laminated on the back sheet 20, and then the three-dimensional gather 40 and the top sheet 10 are laminated. , The absorbent article 1 is formed by separating at regular intervals. By the above steps, there is no part to be cut and removed, and expensive highly absorbent polymer particles are not discarded by cutting. Therefore, the absorbent article 1 having good softness and texture is manufactured at a relatively low cost. can do.
Further, preferably, by laminating the first absorbers 30 at intervals L as described above, an absorbent article 1 having a slit portion capable of directly feeding the body fluid to the second absorbers 31 can be obtained.

Although the present invention has been described above using the embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope of the invention described in the above embodiments. It will be apparent to those skilled in the art that improvements can be made. Further, it is clear from the description of the claims that the form in which such a modification or improvement is added may be included in the technical scope of the present invention.

1 Absorbent article 10 Top sheet 20 Back sheet 30, 31, 32, 33, 301 Absorber 40 Three-dimensional gather 50, 51 Carrier sheet 60, 61, 62, 63, 64 Fusion part 70 roll

Claims (4)

The acetate tow is opened by air, and high-absorbent polymer particles are supported to form an absorber core, and then the entire absorbent core is wrapped with a water-permeable and thermoplastic non-woven fabric to form a single absorbent core. Absorber formation step to form a continuous absorber,
Longitudinal fusion sections substantially parallel to the longitudinal direction of one continuous absorber are alternated to the left and right in the width direction at positions equally spaced to the left and right in the width direction from the center line in the width direction of one continuous absorber. The front end of the longitudinal fusion splicer and the rear end of the longitudinal fusion splicer provided adjacent to each other in the front-rear direction in the longitudinal direction are provided in the same length as each other A heat fusion process that provides a part to form a series of fusion lines,
A cutting and separating step in which one continuous absorber is cut along the fusion line, and the separated continuous absorber becomes a pair of continuous absorbers facing each other in the width direction.
Direction adjustment that adjusts the direction of the pair of continuous absorbers separated in the cutting and separating step so that the concave-convex shapes formed so as to face inward in the width direction of each other face outward in the width direction. Process and
A position adjustment step of adjusting the position of the concave-convex shape of the pair of continuous absorbers obtained in the direction adjustment step in the longitudinal direction and matching the phases so that the convexes and the concaves are in phase with each other in the longitudinal direction. ,
The pair of continuous absorbers obtained in the position adjusting step are separated by straight lines provided at regular intervals in the longitudinal direction at each outward convex portion to form a pair on the left and right, and The final molding process to obtain the first absorber, which is an hourglass type,
A pair of left and right first absorbers obtained in the final molding step are laminated on an hourglass-shaped second absorber composed of a fluff and highly absorbent polymer particles laminated on a back sheet, and a three-dimensional gather and a top are laminated. A method for producing an absorbent article, which comprises a finished product forming step of forming an absorbent article by laminating the sheets and then separating them at regular intervals. The direction adjusting step includes a step of inverting each of a pair of separated continuous absorbers outward in the width direction.
The position adjusting step includes a step of performing phase adjustment by passing at least one continuous absorber of the pair of separated continuous absorbers through rolls installed at the upper part and / or the lower part of the traveling position. The method for producing an absorbent article according to claim 1, wherein the absorbent article is produced. The orientation adjusting step comprises moving one of the pair of consecutive absorbers, one continuous absorber, to the opposite side of the row of the other continuous absorber.
The method for producing an absorbent article according to claim 1, wherein the position adjusting step includes a step of adjusting the phase according to the distance for the movement. The method according to any one of claims 1 to 3, wherein in the finished product forming step, the pair of left and right first absorbers are arranged at intervals of 10 mm or more and 30 mm or less in the width direction. A method for manufacturing an absorbent article.

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