JP6939617B2 - Absorbent article - Google Patents

Description

The present invention relates to absorbent articles.

In absorbent articles such as disposable diapers, urine pads, and sanitary products, pulp and super absorbent polymer (SAP) are used as an absorbent material for absorbing urine and body fluids (for example, Patent Documents). 1). Usually, these absorbents are arranged on the skin contact surface side of the absorbent article as an absorber formed into a thin sheet-like shape, a mat-like shape, or the like. For example, an absorber in which SAP particles are dispersed and arranged in a pulp mat, and an absorber in which the SAP particles are arranged in layers between a plurality of pulp mats are known.

JP-A-2017-77400

In addition to the absorbent body that absorbs liquids such as urine and stool, the absorbent articles are provided with gathers to prevent the outflow of the liquids. The gathers adhere to the wearer's skin to prevent the formation of a gap that serves as a liquid outflow route between the absorbent article and the wearer's skin as much as possible. However, gathers usually have a structure in which a sheet that does not allow liquid to permeate is brought into close contact with the wearer's skin by the elastic force of the rubber thread, so if a gap is created between the sheet and the skin, the outflow of liquid is stopped. Can't.

Therefore, an object of the present invention is to provide an absorbent article in which leakage of liquid is suppressed.

In order to solve the above problems, in the present invention, it is decided to provide a pair of contact portions having SAP particle groups on each of the left and right edges of the absorber.

Specifically, the present invention is an absorbent article having a length along the longitudinal direction and a width along the width direction orthogonal to the longitudinal direction, which is joined to a liquid-impermeable backsheet and the backsheet. At least a part of the liquid-permeable top sheet, the absorber arranged between the back sheet and the top sheet, and each edge of the left and right sides of the absorber when the absorber is viewed from the top sheet side. Is arranged on the top sheet side of the absorber in a state of being overlapped with the absorber, and has a group of SAP particles which is a highly absorbent polymer. It is provided with a pair of contact portions that come into contact with the.

Here, the SAP particle group may contain fine powder of SAP and other foreign substances, but it is preferable that the SAP particles mainly occupy the particles. Further, in the present application, the SAP particles refer to particles of a resin composition containing SAP. The "resin composition containing SAP" refers to both a composition consisting of SAP alone and a composition containing SAP as a main component and containing other substances to the extent that it does not adversely affect water absorption. It is a concept to be included. Starch-based, cellulosic-based, and synthetic resin-based materials can be used for SAP. In addition, the left and right edges of the absorber mean the left and right sides of the absorber placed directly under the part where the liquid is discharged from the wearer, and the positions of the left and right edges of the absorber are clear. It does not include the concept of limiting to a part that does not contribute to the leakage of the liquid discharged from the wearer in such a form.

In addition, the absorbent article has a part corresponding to the front body, the inseam area, and the back body of the wearer, and the absorber extends from the part corresponding to the front body to the part corresponding to the back body. The contact portion may extend from the portion corresponding to the front body to the portion corresponding to the back body of each edge on both the left and right sides of the absorber.

Further, the contact portion may be fixed to the top sheet with an adhesive.

Further, the contact portion may be a sheet in which a group of SAP particles is adhered to a base material, and may have a notch portion in which a portion corresponding to the lower limbs of the wearer is cut out.

Further, the absorber may be a pulp fiber containing a particulate absorber, and the abutting portion may be a sheet in which a group of SAP particles is fixed to a base material or encapsulated in a fibrous material.

Further, in the abutting portion, the end portion of both ends in the width direction, which is closer to the outside of the absorbent article, may be located closer to the outside than both ends in the width direction of the absorber.

Further, in the abutting portion, the density of the SAP particles in the portion corresponding to the inseam region of the wearer may be higher than the density of the SAP particles in the portion corresponding to the front body and the back body of the wearer.

Further, in the abutting portion, the density of the SAP particles in the portion corresponding to the inseam region and the back body of the wearer may be higher than the density of the SAP particles in the portion corresponding to the front body of the wearer.

The present invention can also be grasped from the aspect of the method. That is, the present invention is, for example, a method for producing an absorbent article, in which a pair of SAP sheets having a step of mounting an absorber on a liquid-impermeable back sheet and a group of SAP particles which are highly absorbent polymers. The step of placing the SAP sheet on the back sheet with at least a part overlapping the left and right edges of the absorber, and the absorbent body on which the SAP sheet is placed on the left and right edges of the absorber are sandwiched between the liquid permeable top sheet and the back sheet. It may include steps and.

Further, in the step of mounting the absorber on the back sheet, the absorber is mounted on the sheet continuously unwound from the roll around which the back sheet is wound, and in the step of mounting the SAP sheet on each of the left and right edges of the absorber, SAP is used. The sheet that is continuously unwound from the roll around which the sheet is wound may be divided into left and right, and at least a part of the sheet may be placed on the back sheet so as to overlap each of the left and right edges of the absorber.

With the above-mentioned absorbent article, leakage of liquid can be suppressed.

FIG. 1 is a perspective view of a tape-type disposable diaper. FIG. 2 is an exploded perspective view of a tape-type disposable diaper. FIG. 3 is a diagram showing changes in the cross-sectional shape of the tape-type disposable diaper. FIG. 4 is a diagram showing the positional relationship between the absorber, the SAP sheet, and the wearer's buttocks. FIG. 5 is a diagram showing a first example of a method for manufacturing a tape-type disposable diaper. FIG. 6 is a diagram showing a second example of a method for manufacturing a tape-type disposable diaper.

Hereinafter, embodiments of the present invention will be described. The embodiments shown below are examples of embodiments of the present invention, and the technical scope of the present invention is not limited to the following embodiments.

<Embodiment>
FIG. 1 is a perspective view of a tape-type disposable diaper (an example of an “absorbent article” in the present application, hereinafter simply referred to as a “diaper”). The diaper 1 is located in the inseam area 1B, which is a part corresponding to the inseam area covering the wearer's genital area in the wearing state, and the front body area 1F, which is a part corresponding to the front body of the wearer, located on the front side of the inseam area 1B. And the back body region 1R, which is located behind the inseam region 1B and corresponds to the back body of the wearer. Tapes 2L and 2R that can be attached to the front patch 2F provided on the non-wearer side surface of the front body area 1F are provided on the left and right side edges of the back body area 1R. Therefore, in the diaper 1, when the tapes 2L and 2R are attached to the front patch 2F with the front body area 1F arranged on the ventral side of the wearer and the back body area 1R arranged on the back side of the wearer. , It is fixed to the wearer's body in a state surrounding the wearer's abdominal circumference and thigh. Since the diaper 1 is fixed to the wearer's body in such a form, the wearer can walk while wearing the diaper 1.

In the diaper 1, an absorber capable of absorbing and holding the liquid is mainly arranged around the inseam region 1B. Further, in the diaper 1, in order to suppress the formation of a gap that serves as a liquid outflow route between the diaper 1 and the wearer's skin, the three-dimensional gathers 3BL, 3BR are formed on the portion surrounding the wearer's thigh. Is provided, and a waist gather 3R is provided at a portion surrounding the wearer's abdominal circumference. The three-dimensional gathers 3BL and 3BR and the waist gathers 3R come into close contact with the wearer's skin due to the elastic force of the rubber thread. Therefore, the liquid discharged from the pubic area of the wearer is absorbed by the absorber of the diaper 1 with almost no leakage from the diaper 1.

FIG. 2 is an exploded perspective view of the diaper 1. The diaper 1 has a cover sheet 4 that forms an outer surface when worn. The cover sheet 4 is a sheet-like member having a substantially rectangular appearance in which 4KL and 4KR are constricted in a portion corresponding to a long side. The constriction 4KL and 4KR are provided at a position where the wearer's thigh is located. The cover sheet 4 is provided for reinforcing the back sheet 5 and improving the feel. For example, in order to suppress leakage of excrement, a non-woven fabric made of a liquid-impermeable thermoplastic resin may be used as the material thereof. can. Examples of the liquid-impermeable thermoplastic resin include polyethylene (PE) and polypropylene (PP).

The diaper 1 has a back sheet 5, an absorber 6C, and a top sheet 7 that are sequentially laminated on the wearer-side surface of the cover sheet 4. The back sheet 5, the absorber 6C, and the top sheet 7 are all sheet-like members having a rectangular appearance, and are sequentially laminated on the cover sheet 4 in a state where the longitudinal direction coincides with the longitudinal direction of the cover sheet 4. .. Like the cover sheet 4, the back sheet 5 is a sheet formed of a liquid-impermeable thermoplastic resin as a material in order to suppress leakage of excrement. Further, the top sheet 7 is a sheet-like member arranged on the skin surface side of the wearer so as to cover the water absorption surface of the absorber 6C. The top sheet 7 has liquid permeability in a part or all of it. Therefore, in the state where the diaper 1 is worn, the liquid excreted from the wearer enters the absorber 6C through the top sheet 7 which can come into contact with the wearer's skin, and is absorbed there. For example, a woven fabric, a non-woven fabric, or a porous film can be used as a material for the top sheet 7. Further, the top sheet 7 may also have hydrophilicity.

The back sheet 5, the absorber 6C, and the top sheet 7 all extend from the front body region 1F to the back body region 1R. Therefore, when the wearer's pubic area is covered with the cover sheet 4 in which the back sheet 5, the absorber 6C, and the top sheet 7 are laminated, both ends of the back sheet 5, the absorber 6C, and the top sheet 7 in each longitudinal direction are displayed. It will be located on the ventral and dorsal sides of the wearer. That is, the genital area of the wearer is covered with the absorber 6C from the ventral side to the dorsal side of the wearer. Therefore, regardless of whether the wearer discharges the liquid to the outside of the body in either the abdomen-down posture or the back-down posture, the discharged liquid contacts the absorber 6C via the top sheet 7. Will be done.

Further, the diaper 1 has elongated strip-shaped side sheets 8L and 8R for forming the above-mentioned three-dimensional gathers 3BL and 3BR. The side seats 8L and 8R are provided on the long side portion of the top seat 7. Similar to the three-dimensional gathers 3BL and 3BR of the diaper 1, the side seats 8L and 8R are provided with 8KL and 8KR constricted at the position where the wearer's thigh is located. The thread rubbers 8EL and 8ER are woven into the constricted 8KL and 8KR along the longitudinal direction. Therefore, in the constricted 8KL and 8KR, when the diaper 1 is in the wearing state, that is, when the diaper 1 is in the U-shaped side view, the diaper 1 is pulled in the longitudinal direction by the contraction force of the rubber threads 8EL and 8ER and is pulled from the top sheet 7. It becomes a three-dimensional gather that stands up and prevents the outflow of liquid.

Further, the thread rubber 9ER for forming the waist gather 3R described above is provided between the back sheet 5 and the top sheet 7 at a position further back than the end portion of the absorber 6C. The rubber thread 9ER is provided between the back seat 5 and the top seat 7 in a direction in which the longitudinal direction, which is the expansion and contraction direction, is the left-right direction of the diaper 1. Therefore, when the tapes 2L and 2R provided on the left and right sides of the rubber thread 9ER are attached to the front patch 2F on the ventral side of the wearer, the rubber thread 9ER exerts a contraction force to give the diaper 1 to the wearer. It is brought into close contact to prevent a gap from being formed between the diaper 1 and the wearer's abdominal circumference. Thread rubbers 9SL and 9SR are provided on both sides of the absorber 6C to prevent a gap from being formed between the diaper 1 and the wearer's abdominal circumference.

Further, the diaper 1 is a SAP sheet arranged between the top sheet 7 and the back sheet 5 in a state where at least a part of the diaper 1 overlaps the absorber 6C at each edge on both the left and right sides which is the long side portion of the absorber 6C. It has 6L and 6R (an example of the "contact portion" in the present application). The SAP sheets 6L and 6R are elongated sheets extending from the front body region 1F to the back body region 1R at each of the left and right side edges, which are the long side portions of the absorber 6C. The SAP sheets 6L and 6R may have a notch portion in which a portion corresponding to the lower limb of the wearer is cut out, or may have a simple band-like form having no notch portion. If the SAP sheets 6L and 6R have a portion corresponding to the wearer's lower limbs cut out, the wearing feeling that the SAP sheets 6L and 6R give to the wearer's lower limbs can be reduced.

Further, the SAP sheets 6L and 6R may be fixed to the top sheet 7 with an adhesive, or may be arranged on both the absorber 6C and the top sheet 7 without using an adhesive. May be good. If the SAP sheets 6L and 6R are fixed to the top sheet 7 with an adhesive, it is possible to prevent the liquid from leaking from the diaper 1 due to the misalignment of the SAP sheets 6L and 6R. Further, the SAP sheets 6L and 6R may be closer to the top sheet 7 than the absorber 6C. For example, the SAP sheets 6L and 6R may be provided on the wearer side surface of the top sheet 7.

The absorber 6C contains water in the gaps between short fibers of cellulosic fibers such as pulp fibers, rayon fibers, or cotton fibers, and short fibers obtained by hydrophilizing synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate. It has a structure in which a granular absorbent resin such as SAP, which is a hydrophilic polymer having a crosslinked structure capable of absorbing and retaining a fiber (an example of a “particulate absorbent material” referred to in the present application) is retained. Therefore, in the absorber 6C, the volume fluctuation of the absorbent resin before and after absorbing the liquid is basically performed in the short fibers that hold the absorbent resin in the gap. Therefore, when the entire absorber 6C is viewed from a bird's-eye view, it can be said that the expansion coefficient of the thickness of the absorber 6C that has absorbed the liquid is not as large as the expansion coefficient of the absorbent resin itself.

On the other hand, the SAP sheets 6L and 6R do not have a structure in which SAP particles are scattered in the gaps between fibers, but a structure in which SAP particle groups are fixed on the surface of a sheet-like base material such as a non-woven fabric, or SAP. It has a structure in which the particles of the above particles are contained in a bag of a liquid-permeable fibrous material, and is separated from other constituent elements (for example, absorber 6C, etc.) constituting the diaper 1. The SAP particles of the present embodiment refer to particles of a resin composition containing SAP. The term "resin composition containing SAP" as used herein refers to both a composition consisting of SAP alone and a composition containing SAP as a main component and containing other substances to the extent that it does not adversely affect water absorption. It is a concept that includes. Examples of the "other substance" include additives (surface modifiers added for the purpose of hydrophobizing the particle surface, etc.), unreacted monomers remaining during the synthesis of SAP, and the like.

Therefore, in the SAP sheets 6L and 6R, the volume fluctuation of the SAP before and after absorbing the liquid is performed on the surface of the sheet-like base material to which the SAP is fixed or in the bag wrapped with the SAP particles. Further, in the SAP sheets 6L and 6R, a space capable of absorbing the volume fluctuation of the SAP is not secured in the structure of the SAP sheets 6L and 6R like the space formed in the gap between the short fibers in the absorber 6C. .. Therefore, when the entire SAP sheets 6L and 6R are viewed from a bird's-eye view, it can be said that the expansion coefficient of the thickness of the SAP sheets 6L and 6R that have absorbed the liquid is about the same as the expansion coefficient of the SAP itself. The SAP sheets 6L and 6R preferably contain at least SAP in the diaper 1 in the largest weight ratio, and for example, all the components may be SAP (SAP 100%) or less. From the viewpoint of the expansion of the SAP particles in the SAP sheets 6L and 6R, the mass average particle size of the SAP particles is, for example, 180 to 500 μm. The "mass average particle size" can be measured by a known sieving method.

Since the diaper 1 has the SAP sheets 6L and 6R as described above on the left and right sides of the absorber 6C, the cross-sectional shape changes as follows when the liquid is absorbed. FIG. 3 is a diagram showing changes in the cross-sectional shape of the diaper 1. FIG. 3A shows the cross-sectional shape of the diaper 1 before absorbing the liquid, and FIG. 3B shows the cross-sectional shape of the diaper 1 after absorbing the liquid. In the diaper 1, since the SAP sheets 6L and 6R are arranged on the left and right sides of the absorbent body 6C, the liquid discharged from the wearer is absorbed by the absorbent body 6C and the SAP sheets 6L and 6R. The SAP sheets 6L and 6R absorb the liquid and expand, and rise at the left and right side portions of the absorber 6C. The SAP sheets 6L and 6R raised on the left and right sides of the absorber 6C serve as a bank to prevent the liquid discharged from the wearer from flowing out to the left or right side of the absorber 6C before being absorbed by the absorber 6C. Further, the expansion of the SAP sheets 6L and 6R itself forms a space between the absorber 6C and the wearer. Therefore, even if the liquid is discharged from the wearer with a gap between the skin of the wearer of the diaper 1 and the constricted 8KL and 8KR, the leakage of the liquid from the diaper 1 is suppressed. Will be done. The SAP sheets 6L and 6R are not intended to absorb and hold a liquid such as urine by the SAP sheets 6L and 6R themselves, but in this way, the SAP sheets 6L and 6R themselves swell and become the absorber 6C. By forming a space between the absorber 6C and the wearer, the loss of space between the absorber 6C and the wearer due to the absorber 6C absorbing water and expanding is suppressed, and the stool discharged from the wearer, etc. The purpose is to prevent liquid from leaking sideways. Therefore, since the SAP sheets 6L and 6R come into contact with the buttocks of the wearer, the SAP sheets 6L and 6R contain a flexible material other than SAP (for example, non-woven fabric or tissue) in order to ensure flexibility. It is desirable that a large amount of SAP is contained at a ratio that allows a space to be formed between the absorber 6C and the wearer due to the expansion of the 6R itself. Since the SAP sheets 6L and 6R are provided for such a purpose, the sheet folds and SAPs that wrap the SAP are provided so that the expansion when the SAP sheets 6L and 6R absorb water is not in the width direction but in the thickness direction. It is preferable to design so that the expansion of the SAP sheets 6L and 6R in the width direction is regulated by the members to be adhered or the form of adhesion of the SAP sheets 6L and 6R to the absorber 6C. Further, in the SAP sheets 6L and 6R, it is preferable that the ends of the both ends in the width direction closer to the outside of the diaper 1 are closer to the outside than both ends in the width direction of the absorber 6C.

The SAP sheets 6L and 6R may have SAP particle groups evenly arranged over the entire SAP sheet 6L and 6R. For example, the SAP particles in the portion corresponding to the inseam region of the wearer may be used. The density may be greater than the density of the SAP particles at the sites corresponding to the wearer's front and back bodies. Further, in the SAP sheets 6L and 6R, even if the density of the SAP particles in the portion corresponding to the inseam region and the back body of the wearer is higher than the density of the SAP particles in the portion corresponding to the front body of the wearer. good. If the density of SAP particles in the area corresponding to the wearer's inseam area is greater than the density of SAP particles in the area corresponding to the wearer's front and back bodies, for example, the wearer is walking around and diaper 1 Is likely to maintain the state in which the SAP sheets 6L and 6R are in contact with the wearer even when the particles are displaced downward along the direction of gravity. Further, if the density of the SAP particles in the inseam region and the portion corresponding to the back body of the wearer is higher than the density of the SAP particles in the portion corresponding to the front body of the wearer, for example, the wearer is asleep or In the case of a newborn baby, the space between the absorber 6C and the wearer in the inseam area and the portion corresponding to the back body of the wearer is likely to be maintained.

The dimensions of the absorber 6C and the SAP sheets 6L and 6R can be determined, for example, as follows. FIG. 4 is a diagram showing the positional relationship between the absorber 6C, the SAP sheets 6L and 6R, and the wearer's buttocks. As shown in FIG. 4, the buttock of the wearer has a left buttock DL on the left side of a portion where liquid is discharged from the wearer's body and a right buttock DR on the right side. In FIG. 4, the most raised part of the left buttock DL and the most raised part of the right buttock DR are referred to as “tops” and are shown by broken lines. FIG. 4 shows a state in which both the SAP sheet 6L and the SAP sheet 6R have already expanded by absorbing the liquid.

The SAP sheets 6L and 6R are separated from each other because they serve as banks to prevent the liquid discharged from the wearer from flowing out to the left side or the right side of the absorber 6C before being absorbed by the absorber 6C. The SAP sheets 6L and 6R are arranged so as to surround the portion where the liquid is discharged from the wearer's body from both the left and right sides. The distance between the SAP sheet 6L and the SAP sheet 6R depends on the use of the diaper 1, but for example, when the diaper 1 corresponds to defecation, the distance is large enough to accommodate the stool discharged from the wearer. Is preferable.

Further, at least a part of the SAP sheets 6L and 6R overlap with the left and right edges of the absorber 6C so that the liquid does not leak from between the SAP sheets 6L and 6R and the absorber 6C. Most of the parts of the SAP sheets 6L and 6R may overlap with the edge of the absorber 6C as shown in FIGS. 4 (A), 4 (B) and 4 (C), or FIG. 4 (D). As illustrated in the above, a small part of the portion may overlap with the edge of the absorber 6C. The SAP sheets 6L and 6R are overlapped over all the parts along the longitudinal direction of each edge on the left and right sides of the absorber 6C, and one along the longitudinal direction of each edge on the left and right sides of the absorber 6C. It may be in any form that overlaps the parts.

The dimensions of the absorber 6C and the SAP sheets 6L and 6R are determined according to the above conditions. The specific dimensions of the absorber 6C and the SAP sheets 6L and 6R are determined according to the age group, gender, size, characteristics of the diaper 1 and the like assumed for the diaper 1. For example, since the absorber 6C of FIG. 4 (B) has a wider width than the absorber 6C shown in FIG. 4 (A), the amount of liquid that can be absorbed by the absorber 6C is relatively large. Further, for example, since the absorber 6C of FIG. 4 (C) has a smaller width than the absorber 6C shown in FIG. 4 (A), the wearing feeling given to the wearer is relatively small. Further, for example, the SAP sheets 6L and 6R of FIG. 4 (D) have a wider width than the SAP sheets 6L and 6R shown in FIGS. 4 (A), (B) and (C), and are therefore discharged from the wearer. It is relatively unlikely that the liquid will flow to the left or right side of the absorber 6C before it is absorbed by the absorber 6C. As described above, the characteristics of the diaper 1 change according to the dimensions of the absorber 6C and the SAP sheets 6L and 6R. Therefore, the dimensions of the absorber 6C and the SAP sheets 6L and 6R are taken according to the specifications of the product specified for the diaper 1, but no matter what size the dimensions are taken. , The size of the SAP sheet 6L is determined so that it is arranged in the portion corresponding to the left buttock DL and the SAP sheet 6R is arranged in the portion corresponding to the right buttock DR. At least, if the SAP sheet 6L is arranged at the portion corresponding to the left buttock DL and the SAP sheet 6R is arranged at the portion corresponding to the right buttock DR, the SAP sheets 6L and 6R are discharged from the wearer. In some cases, it can function as a bank that expands and prevents the liquid from flowing out to the left or right side of the absorber 6C before being absorbed by the absorber 6C.

Specifically, for example, in the case of the newborn diaper 1, the width of the absorber 6C is preferably in the range of 80 to 115 mm, and the width of the SAP sheets 6L and 6R is preferably in the range of 5 to 15 mm. Further, for example, in the case of the diaper 1 for infants, the width of the absorber 6C is preferably in the range of 80 to 110 mm, and the width of the SAP sheets 6L and 6R is preferably in the range of 5 to 20 mm. Further, for example, in the case of the adult diaper 1, the width of the absorber 6C is preferably in the range of 160 to 340 mm, and the width of the SAP sheets 6L and 6R is preferably in the range of 5 to 20 mm.

Further, the height (thickness) when the SAP sheets 6L and 6R absorb the liquid and expand is preferably in the range of 2 to 6 mm in the case of, for example, a newborn diaper 1, and is preferably in the range of 2 to 6 mm for infants. In the case of diaper 1 for adults, the range of 2 to 10 mm is preferable, and in the case of diaper 1 for adults, the width of the absorber 6C is preferably in the range of 5 to 15 mm.

The SAP sheets 6L and 6R can be stacked on the left and right edges of the absorber 6C by, for example, the following method.

FIG. 5 is a diagram showing a first example of a method for manufacturing a diaper 1. In the manufacturing method of the first example, the SAP sheets 6L and 6R are, for example, as shown in FIG. The raw material sheet G6LR is evenly cut on the left and right sides by the roller cutter RC, stacked on the absorber raw material sheet G6C, and then cut into appropriate lengths and shapes to be formed so as to overlap the absorber 6C. The SAP sheets 6L and 6R in a state of being overlapped with the absorber 6C are placed on the back sheet 5 on the cover sheet 4 together with the absorber 6C, and are covered with the top sheet 7. After that, post-processes such as attaching the tapes 2L and 2R and the front patch 2F are performed to complete the diaper 1.

In the manufacturing method of the first example, since the SAP sheets 6L and 6R can be continuously formed from one roll in which the SAP raw material sheet G6LR is wound around the core material, the raw material sheet of the SAP sheet 6L is used as the core material. The handling of the material is easier than in the case of preparing two rolls, one in which the roll is wound around the core material and the other in which the raw material sheet of the SAP sheet 6R is wound around the core material.

FIG. 6 is a diagram showing a second example of a method for manufacturing the diaper 1. In the manufacturing method of the second example, the SAP sheets 6L and 6R are, for example, as shown in FIG. It is formed by being carved into. Then, after being stacked on the left and right side edges of the absorber 6C cut into an appropriate length and shape from the absorber raw material sheet G6C, it is placed on the back sheet 5 on the cover sheet 4 and covered with the top sheet 7. After that, a post-process is performed to complete the diaper 1.

In the production method of the second example, the SAP sheets 6L and 6R are cut out from the SAP raw material sheet G6LR and the absorber 6C is cut out from the absorber raw material sheet G6C separately. Compared with the manufacturing method, the shapes and sizes of the SAP sheets 6L and 6R can be designed relatively freely.

In the above embodiment, a tape-type disposable diaper has been exemplified, but in other forms of absorbent articles, a form in which the SAP sheets 6L and 6R are overlapped on the left and right edges of the absorbent body 6C can be applied. be. As an absorbent article to which the form in which the SAP sheets 6L and 6R are stacked on the left and right edges of the absorber 6C can be applied, for example, absorption of various forms with gathers such as a pants-type disposable diaper, a urine pad, and a light incontinence pad. Examples include sex articles and flat absorbent articles without gathers.

1 ・ ・ Diaper (tape type disposable diaper): 1B ・ ・ Inseam area: 1F ・ ・ Front body area: 1R ・ ・ Back body area: 2F ・ ・ Front patch: 2L, 2R ・ ・ Tape: 3BL, 3BR ・ ・ Solid Gather: 3R ... West gather: 4 ... Cover sheet: 4KL, 4KR ... Constriction: 5 ... Back sheet: 6C ... Absorber: 6L, 6R ... SAP sheet: 7 ... Top sheet: 8 ... Side sheet: 8KL, 8KR ... Constriction: 8EL, 8ER, 9SL, 9SR, 9ER ... Thread rubber: DL ... Left buttock: DR ... Right buttock: G6LR ... SAP raw material sheet: G6C ... Absorber raw material sheet : RC ... Roller cutter

Claims (8)

An absorbent article having a length along the longitudinal direction and a lateral width along the width direction orthogonal to the longitudinal direction.
With a liquid-impermeable backsheet,
A liquid-permeable top sheet bonded to the back sheet and
An absorber arranged between the back sheet and the top sheet,
At each of the left and right edges of the absorber, at least a part of the absorber is arranged on the topsheet side of the absorber in a state of overlapping the absorber when viewed from the topsheet side. A pair of abutting portions that have a group of particles of SAP, which is a highly absorbent polymer, and that will abut on the buttocks between the buttocks of the wearer of the absorbent article and the absorber.
Equipped with a,
On the top sheet side of the absorber, a portion surrounded by the pair of contact portions is flat.
Absorbent article. The absorbent article has parts corresponding to the wearer's front body, inseam area, and back body.
The absorber extends from the portion corresponding to the front body to the portion corresponding to the back body.
The contact portion extends from a portion corresponding to the front body to a portion corresponding to the rear body on each of the left and right edges of the absorber.
The absorbent article according to claim 1. The contact portion is fixed to the top sheet with an adhesive.
The absorbent article according to claim 1 or 2. The contact portion is a sheet in which a group of SAP particles is adhered to a base material, and has a notch portion in which a portion corresponding to the lower limbs of the wearer is cut out.
The absorbent article according to any one of claims 1 to 3. The absorber is a pulp fiber containing a particulate absorber.
The contact portion is a sheet in which a group of SAP particles is fixed to a base material or encapsulated in a fibrous material.
The absorbent article according to any one of claims 1 to 4. The abutting portion has both ends in the width direction closer to the outside of the absorbent article, which are closer to the outside than both ends in the width direction of the absorber.
The absorbent article according to any one of claims 1 to 5. In the contact portion, the density of the SAP particles in the portion corresponding to the inseam region of the wearer is larger than the density of the SAP particles in the portion corresponding to the front body and the back body of the wearer.
The absorbent article according to any one of claims 1 to 6. In the contact portion, the density of the SAP particles in the inseam region and the portion corresponding to the back body of the wearer is larger than the density of the SAP particles in the portion corresponding to the front body of the wearer.
The absorbent article according to any one of claims 1 to 6.

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