JP2014036833A - Absorbent article and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article improved in rigidity of a side flap part by embossing without causing a defect such as a pinhole in a rear surface layer, and a method for manufacturing the same.SOLUTION: An absorbent article 1 includes: a body part M extending in the longitudinal direction; and side flap parts SF projected outward in the width direction from the body part M. The body part M includes: a liquid permeable top sheet 2; a liquid impermeable back sheet 3; and an absorber disposed between the top sheet 2 and the back sheet 3. The side flap part SF includes: a side sheet 11 extending outward in the width direction from the outer end in the width direction of the top sheet 2; the back sheet 3: and an intermediate layer 12 disposed between the side sheet 11 and the back sheet 3. The side flap SF includes: the side sheet 11; the intermediate layer 12; and a plurality of embossing parts 20 pressed in the width direction by embossing the back sheet 3. The intermediate layer 12 includes fibers having a higher melting point than the back sheet 3.

Description

  The present invention relates to an absorbent article and a method for manufacturing the same, and more particularly to an absorbent article including a side flap portion subjected to embossing and a method for manufacturing the same.

  In general, an absorbent article such as a sanitary napkin is provided with a liquid-permeable surface layer, a liquid-impermeable back layer, and an absorbent body disposed therebetween, thereby allowing body fluids such as menstrual blood to flow. Absorb and retain. Further, in order to prevent body fluid such as menstrual blood from leaking around the absorbent article and adhere to the wearer's clothes, the absorbent having a side flap portion extending outward in the width direction from the absorbent body The article is known.

  The side flap part of an absorbent article is fixed to shorts etc. via the adhesive agent apply | coated to the back surface. However, if the rigidity of the side flap portion is low, a twist or wrinkle is likely to occur when the side flap portion is mounted on shorts or the like. The wrinkles or wrinkles generated in the side flaps are easily fixed by the adhesive, and it is difficult to remove them and return them to their original shapes. Therefore, a technique for increasing the rigidity of the side flap portion is known in order to suppress wobbling or wrinkling during mounting.

  Patent Document 1 describes embossing the rear region of the side flap portion provided on the sanitary napkin. The concavo-convex portion formed by embossing increases the rigidity of the side flap portion and suppresses warping and wrinkles.

  Patent Document 2 describes that a reinforcing layer is disposed between the top sheet and the back sheet of the side flap portion in order to increase the rigidity of the side flap portion provided in the sanitary napkin. Examples of the material for the reinforcing layer include materials having high rigidity and high bending stress, such as paper, nonwoven fabric, synthetic resin film, and synthetic resin foam sheet.

JP2003-339765A (FIG. 1, paragraph 0016, etc.) Japanese Utility Model Publication No. 5-65319 (FIGS. 3, 4, paragraph 0012, etc.)

  When embossing the side flap part of a sanitary napkin, when embossing from the surface layer side with an embossing roll, a recess is formed in the surface layer, and the film of the back layer also extends following the shape of the recess. At this time, there is a possibility that pinholes (holes) may occur in the back layer. Moreover, when a linear recessed part is formed in a side flap part by embossing, the intensity | strength of the part falls and there exists a possibility that the film of a back surface layer may fracture | rupture.

  On the other hand, when a highly rigid material is disposed as a reinforcing layer on the side flap portion of the sanitary napkin, there is a problem that the side flap portion becomes hard and the touch is deteriorated. In addition, if embossing is performed on the side flap portion provided with a material having high rigidity as the reinforcing layer, the reinforcing layer cannot follow the dent of the surface layer, and the reinforcing layer may be broken.

  The present invention has been made in view of the above-described problems, and provides an absorbent article having increased rigidity of the side flap portion by embossing without causing defects such as pinholes in the back surface layer and a method for manufacturing the same. With the goal.

  In order to solve the above-described problems, the present invention has the following features. A first feature of the present invention is an absorbent article including a main body portion (main body portion M) extending in the front-rear direction and a side flap portion (side flap portion SF) protruding outward in the width direction from the main body portion. The main body includes a liquid-permeable surface layer (top sheet 2), a liquid-impermeable back layer (back sheet 3), and an absorber (between the surface layer and the back layer). The side flap portion includes a side sheet (side sheet 11) that extends outward in the width direction from the width direction outer end of the surface layer, the back surface layer, the side sheet, and the back surface layer. An intermediate layer (intermediate layer 12) disposed between the side flap portion, and the side flap portion, the side sheet, the intermediate layer, and the back layer are embossed, and a plurality of embossed portions ( Embossed part 20 Hints, the intermediate layer is summarized in that comprising fibers having a melting point higher than the back layer.

  The present invention has the following features. According to a second aspect of the present invention, there is provided a liquid-permeable surface layer, a liquid-impermeable back layer, a main body including an absorber disposed between the surface layer and the back layer, and the surface layer. A side sheet that extends from the outer end in the width direction to the outer side in the width direction, the back surface layer, and an intermediate layer disposed between the side sheet and the back surface layer; A step of adhering between the side sheet and the intermediate layer with a hot melt adhesive, and adhering between the intermediate layer and the back layer with a hot melt adhesive; The outer periphery of the absorbent article is sealed by embossing, and at the same time, the side sheet, the intermediate layer, and the back layer are pressed in the thickness direction by embossing at the side flap portion. It includes a step of, wherein the intermediate layer is summarized in that comprising fibers having a melting point higher than the back layer.

  According to this feature, since the intermediate layer including the fiber having a higher melting point than the back surface layer is disposed in the side flap portion, embossing can be performed at a temperature lower than the melting point of the intermediate layer. As a result, damage to the back layer due to embossing can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which raised the rigidity of the side flap part by embossing, and its manufacturing method can be provided, without producing defects, such as a pinhole, in a back surface layer.

Drawing 1 is a top view seen from the surface side of an absorptive article concerning an embodiment of the present invention. FIG. 2 is a rear view of the absorbent article shown in FIG. FIG. 3 is a schematic cross-sectional view of the A-A ′ cross section shown in FIG. 1. FIG. 4 is a schematic cross-sectional view of an embossed portion in the absorbent article shown in FIG. FIG. 5 is a plan view showing an intermediate layer arranging step in the method of manufacturing an absorbent article according to the embodiment of the present invention. FIG. 6 is a plan view of an absorbent article according to the first modification. FIG. 7 is an enlarged view of a portion B shown in FIG. It is a partial top view of the absorptive article concerning modification 2. It is a partial top view of the absorbent article which concerns on the modification 3. It is a top view of an absorptive article concerning modification 4.

(overall structure)
Next, the overall configuration of the embodiment of the absorbent article according to the present invention will be described with reference to the drawings. 1 to 3 show an absorbent article 1 according to an embodiment of the present invention. FIG. 1 is a plan view of the absorbent article, and FIG. 2 is a rear view of the absorbent article. 3 is a cross-sectional view taken along line AA ′ shown in FIG. The absorbent article 1 according to the present embodiment is, for example, a sanitary napkin.

  The absorbent article 1 includes a main body portion M extending in the longitudinal direction L, and a side flap portion SF protruding from the main body portion M to the outside in the width direction W. The main body M is disposed between the liquid-permeable top sheet 2 that contacts the wearer's skin, the liquid-impermeable back sheet 3 that contacts the wearer's underwear, and the top sheet 2 and the back sheet 3. The absorber 4 is provided. The absorber 4 is arrange | positioned in the center part in the longitudinal direction L and the width direction W of the main-body part M by planar view.

  Side flap part SF is located behind the rear end part of wing part WG arrange | positioned in the width direction outer side of the center area | region including the center of the excretion opening | mouth contact | abutting area | region where a wearer's excretion opening | contacts, and wing part WG A hip flap portion HF.

  Here, the center of the excretion opening contact area coincides with the center in the longitudinal direction and the width direction of the central area where the wearer's excretion opening contacts. For example, in an absorbent article having a wing portion, the center in the longitudinal direction of the wing portion is the center in the longitudinal direction of the central region. Moreover, in the absorbent article which does not have a wing part, the position where the length dimension of the width direction of an absorber is the shortest becomes the center of the longitudinal direction of a center area | region. The excretory opening contact region is included in a region that contacts the wearer's crotch, and is located between the wearer's legs.

  The wing portion WG is configured to be folded back to the non-skin contact surface side of the wearer's underwear. A rear end portion of the wing portion WG serving as a front end portion of the hip flap portion HF is a portion located on the innermost side in the width direction between the wing portion WG and the hip flap portion HF. In addition, the rear end part of hip flap part HF may correspond with the rear end part of an absorbent article, and does not need to correspond with the rear end part of an absorbent article.

  The side flap portion SF includes a side sheet 11 extending outward in the width direction W of the top sheet 2, a back sheet 3 extending outward in the width direction W from the main body portion M, and an intermediate disposed between the side seat 11 and the back sheet 3. Layer 12. The side sheet 11 overlaps the top sheet 2 at the inner end in the width direction W, and is joined by a hot melt adhesive or the like. Moreover, the side flap part SF is formed with an embossed part 20 in which the side sheet 11, the intermediate layer 12, and the back sheet 3 are squeezed in the thickness direction by embossing. The embossing includes techniques such as heat embossing and ultrasonic embossing, and any technique can be used here.

  In the absorbent article 1, the outer edges of the top sheet 2, the side sheet 11, and the back sheet 3 are joined, and the absorbent body 4 and the intermediate layer 12 are enclosed. The absorbent article 1 is embossed along the outer edge to form the round seal portion 10, and the top sheet 2, the side sheet 11, and the back sheet 3 are joined. As a joining method, in addition to embossing, it is possible to combine any one or a plurality of ultrasonic waves and hot melt adhesives.

  In the absorbent article 1, a compressed groove 5 is formed by compressing the top sheet 2 and the absorbent body 4 in the thickness direction. In addition, the pressing groove should just be formed by compressing at least the top sheet 2 and the absorber 4 in the thickness direction T, and various configurations can be employed. For example, it can be formed by pressing or embossing, and the shape thereof may be a lattice network or a honeycomb shape.

  An embossed portion 20 that is recessed in the thickness direction T is formed in the hip flap portion HF. The embossed portion 20 is embossed from the side sheet 11 side, so that the side sheet 11, the intermediate layer 12, and the back sheet 3 are pressed in the thickness direction. The embossed portion 20 includes a first embossed wire 21 extending rearward from the rear end portion of the wing portion WG, a second embossed wire 22 branched from the first embossed wire 21, and extended outward in the width direction W. An emboss line 23 and a fourth emboss line 24 are included.

  The second embossed line 22, the third embossed line 23, and the fourth embossed line 24 are formed so as to extend from the inner side in the width direction toward the outer side in the width direction toward the rear, whereby the embossed portion 20 is applied with force. In order to follow the direction, the embossed portion 20 becomes a folding point, and the hip flap portion HF is naturally folded. Therefore, it becomes easy to fit the hip flap part HF reasonably to the body and the underwear. Therefore, disordered wrinkles are not easily generated on the hips, deformation without a sense of incongruity can be achieved, and a clean wearing feeling can be obtained.

(Configuration of top sheet and back sheet)
The top sheet 2 is a liquid-permeable sheet that transmits liquid such as body fluid. The top sheet 2 covers at least the surface of the absorber 4. The top sheet 2 is not particularly limited as long as it is a sheet-like material having a structure that allows liquid to permeate, such as a nonwoven fabric, a woven fabric, a perforated plastic sheet, and a mesh sheet. Either natural fibers or chemical fibers can be used as the woven or non-woven material.

  The backsheet 3 is preferably made of a material having flexibility that does not cause a feeling of strangeness when worn. The back sheet 3 is desirably liquid-impervious and moisture-permeable, and is preferably a polyethylene-based film, but a breathable film containing calcium carbonate and barium sulfate can also be used.

  A plurality of adhesive portions to which a hot melt adhesive is applied are provided on the surface in contact with the underwear of the backsheet 3. The adhesive part is provided on the back side of the main body part M, and is provided on the back side of the wing part WG and the main body part anti-slip material 6 for fixing the absorbent article 1 to the crotch part of the underwear. The wing part slip stopper 9 for fixing the wing part WG and the hip flap for fixing the hip flap part HF in an open state to the back of the underwear, provided on the back side of the hip flap part HF Part displacement prevention material 8.

  In a state before use, the main body part stopper 6 is in contact with the peeling tape 7, and the hip flap part stopper 8 and the wing part stopper 9 are in contact with a peeling tape (not shown). The release tape prevents the adhesive from deteriorating before use. And a peeling tape peels by a wearer at the time of use.

  In addition, in the absorbent article which does not have a peeling tape, you may be comprised so that it may prevent that an adhesive agent deteriorates before use with the packaging sheet which wraps an absorbent article individually. When the adhesive is in contact with the packaging sheet, it is desirable that the surface of the packaging sheet be subjected to a treatment that allows the adhesive to be peeled without reducing the adhesive strength of the adhesive.

(Configuration of absorber)
The absorber 4 includes hydrophilic fibers and pulp. The absorber 4 is formed of a material that can absorb body fluid such as menstrual blood. The absorbent body 4 may be formed by laminating hydrophilic fibers or powder by the airlaid method, an airlaid sheet obtained by forming hydrophilic fibers or powder into a sheet by the airlaid method, or a tissue (for example, It may be formed by placing pulverized pulp mixed with a superabsorbent polymer on a basis weight of 15 g / m ² ) and wrapping it with a tissue.

The absorber 4 is configured by wrapping a pulp obtained by laminating cotton-like pulp, synthetic pulp, or the like at a basis weight of about 100 to 300 g / m ² with protective paper (not shown). The absorber 4 may have a substantially uniform thickness on the entire surface or a non-uniform thickness. The protective paper is for maintaining the shape of the pulp, and for example, crepe paper or tissue paper can be used.

  The absorber 4 extends in the longitudinal direction and is provided so as to include at least the center of the excretory opening contact region. The size of the absorber 4 is about one time smaller than the back sheet 3. The length of the absorbent body 4 in the width direction W corresponds to the crotch interval of an adult woman and is approximately 50 to 80 mm. The absorber 4 is bonded to the back sheet 3 with an adhesive such as hot melt. Moreover, in this embodiment, the absorber 4 and the top sheet 2 are adhere | attached with the hot-melt-adhesive.

(Middle layer structure)
The intermediate layer 12 is disposed between the side seat 11 and the back seat 3 in the side flap portion SF. Preferably, the intermediate layer 12 is disposed over the entire length in the longitudinal direction L from the front end portion to the rear end portion of the side flap portion SF. Thereby, when packaging an absorbent article in the state which folded side flap part SF, a folding position is formed in the stable position along the intermediate | middle layer 12. FIG.

  Moreover, the intermediate | middle layer 12 is arrange | positioned inside the width direction W outer side edge part of side flap part SF. The round seal 10 is densely arranged at the outer end in the width direction W of the side flap portion SF in order to prevent opening. Therefore, by not arranging the intermediate layer 12 at the outer end in the width direction W of the side flap portion SF, the outer end portion in the width direction W of the side flap portion SF is hardened by the round seal 10 and gives the wearer a rubbing stimulus. To prevent.

  The intermediate layer 12 is bonded to the side sheet 11 by a hot melt adhesive. Further, the intermediate layer 12 is bonded to the back sheet 3 by a hot melt adhesive. As will be described later, when the intermediate layer 12 and the side sheet 11 or the back sheet 3 are formed of different materials, heat fusion may not occur by embossing. Then, these are reliably joined by the hot melt adhesive, and further, the joining strength is enhanced by the embossed portion 20 to prevent the intermediate layer 12 and the side sheet 11 or the back sheet 3 from being separated during wearing.

  FIG. 4 is a schematic cross-sectional view of an embossed portion in the absorbent article shown in FIG. The material constituting the intermediate layer 12 includes a material having a higher melting point than the material constituting the back sheet 3. When the intermediate layer 12 includes a material having a melting point higher than that of the back sheet 3, the embossing 20 can be formed by embossing at a temperature lower than the melting point of the intermediate layer. Therefore, damage to the back sheet 3 due to embossing from the side sheet 11 side can be suppressed, and defects such as pinholes can be prevented from occurring in the back sheet 3.

  The melting point of the intermediate layer 12 is measured by differential scanning calorimetry, and the specific procedure is as follows. First, a part of the hip flap portion HF of the absorbent article 1 is cut out and soaked in toluene or the like to dissolve the adhesive. The intermediate layer 12 taken out from toluene is dried at 60 degrees for about 1 hour. The dried intermediate layer 12 is cut out by about 0.002 g and chopped. The chopped intermediate layer 12 is put in an aluminum cell, and after measuring the weight, it is pressed and flattened. The measurement sample of the intermediate layer 12 thus prepared and the blank sample are placed in a differential scanning calorimeter (Shimadzu DSC-60). The measurement sample and the blank sample are heated at a heating rate of 10 ° C./min, and the peak top temperature of the endothermic peak when changing from solid to liquid is measured. The melting point of the back sheet 3 is also measured in the same procedure.

  The intermediate layer 12 is preferably made of SB (spunbond) nonwoven fabric or SMS (spunbond-meltblown-spunbond) nonwoven fabric mainly composed of polypropylene fibers. SB nonwoven fabric and SMS nonwoven fabric are preferable as the intermediate layer 12 from the viewpoints of flexibility and cost. Further, since the SB nonwoven fabric and the SMS nonwoven fabric have a smooth surface, even if they are formed of a material different from that of the side sheet 11 and the back sheet 3, they can be easily combined with the side sheet 11 and the back sheet 3 with a hot melt adhesive or the like. Can be joined. For example, when the back sheet 3 is a polyethylene (melting point: about 130 ° C.)-Based film and the intermediate layer 12 is a polypropylene (melting point: about 160 ° C.)-Based SB nonwoven fabric or SMS nonwoven fabric, the back sheet 3 side is less than the melting point of polyethylene. The embossed portion 20 can be reliably formed while suppressing damage to the backsheet 3 by applying temperature and applying embossing from the side sheet 11 side in the vicinity of the melting point of polyethylene or higher.

  More preferably, by using an SMS nonwoven fabric having a fine fiber meltblown layer for the intermediate layer 12, heat transfer to the back sheet 3 can be suppressed and damage can be suppressed. In addition, a spunlace nonwoven fabric formed from fibers such as polyethylene terephthalate and rayon can be used for the intermediate layer 12.

(Configuration of side seat)
The side sheet 11 extends from the width direction W outer end of the top sheet 2 to the width direction W outer side. Similar to the top sheet 2, the side sheet 11 is disposed closer to the skin contact surface than the absorbent body 4. The side sheet 11 can be selected from the same material as the top sheet 2. The side seat 11 covers both side edges in the width direction W of the main body M, the wing WG, and the hip flap HF.

  The side sheet 11 may be a non-woven fabric, a woven fabric, a perforated plastic sheet, a mesh sheet, or the like, and may have a structure that allows liquid to permeate or a structure that does not allow liquid to permeate. However, when the side sheet 11 has hydrophobicity or water repellency, menstrual blood can be suppressed to the inner side in the width direction than the side sheet 11. Further, even when menstrual blood flows on the side sheet 11, the side sheet 11 is broken by the embossed portion, and thus, for example, the intermediate layer has a configuration that can hold body fluid (for example, an air-through nonwoven fabric). Thus, menstrual blood can be drawn into the intermediate layer located on the non-skin contact surface side with respect to the side sheet 11 through the broken portion.

  The side sheet 11 includes fibers having a melting point lower than that of the fibers forming the intermediate layer 12. Therefore, embossing can be performed at a low temperature when the embossed portion 20 is formed. That is, as shown in FIG. 4, when embossing is performed from the side sheet 11 side at a temperature lower than the melting point of the intermediate layer, the side sheet 11 having a low melting point is thermally bonded to the intermediate layer 12. Thus, the part having a higher melting point than the side sheet 11 does not melt. As a result, damage to the backsheet 3 can be suppressed, and defects such as pinholes can be prevented from occurring in the backsheet 3. The melting point of the side sheet 11 is measured by differential scanning calorimetry as with the intermediate layer 12 and the back sheet 3.

  The side sheet 11 is preferably composed of a through-air nonwoven fabric mainly composed of fibers having a core-sheath structure in which polypropylene is the core and polyethylene is the sheath. For example, when the intermediate layer 12 is a polypropylene-based SB nonwoven fabric or SMS nonwoven fabric, when embossing is performed by applying a temperature near or higher than the melting point of polyethylene from the side sheet 11 side, the polyethylene constituting the sheath of the core-sheath structure While melting, the polypropylene constituting the core does not melt. Therefore, as shown in FIG. 4, the embossed portion 20 can be reliably formed while suppressing damage to the backsheet 3.

  The intermediate layer 12 can also be formed mainly of fibers having a core-sheath structure having polyethylene terephthalate as a core. In addition, since the through-air nonwoven fabric is soft and soft to the touch, when the side flap portion SF is disposed along the body, it is possible to further improve the wearing feeling.

(Method for manufacturing absorbent article)
Next, a part of manufacturing method of the absorbent article 1 according to the present embodiment will be described. In addition, about the method which is not demonstrated, the existing method can be used. The manufacturing method of an absorbent article performs a sheet | seat production | generation process as a 1st step. Next, as a second step, a sheet joining process is performed. Specifically, the top sheet 2 and the side sheet 11 are bonded by, for example, heat welding.

  As a third step, an absorber molding process is performed. Specifically, the absorbent body 4 is formed by molding pulp as a material of the absorbent body with a molding drum. Note that the order of the sheet generation process in the first step and the second step and the absorbent body molding process in the third step may be reversed.

  In the fourth step, a joining process is performed. Specifically, the joining process which joins the absorber shape | molded in the 3rd step, and the top sheet | seat and side sheet | seat joined in the 2nd step is performed.

  In the fifth step, a pressing process is performed. Specifically, the top sheet 2 and the absorbent body 4 are compressed in the thickness direction to form the compressed grooves 5.

  In the sixth step, an intermediate layer bonding step is performed. FIG. 5 is a plan view showing an intermediate layer arranging step in the method of manufacturing an absorbent article according to the embodiment of the present invention. In the intermediate layer arrangement region 41 shown in FIG. 5, a sheet for forming the intermediate layer 12 (for example, an SMS nonwoven fabric mainly composed of polypropylene) is arranged and bonded to the back surface of the side sheet 11. The joining is performed by applying a hot melt adhesive.

  In the seventh step, a backsheet joining process is performed. Specifically, the absorbent body 4 and the top sheet in which the compressed grooves are formed, the side sheet and the intermediate layer, and the back sheet are joined by application of a hot melt adhesive.

  As an eighth step, an embossing process is performed. Specifically, the side sheet 11, the intermediate layer 12, and the back sheet 3 are compressed in the thickness direction to form the embossed portion 20. At this time, the roll on the back sheet 3 side is embossed at a temperature below the melting point of the back sheet 3, and the roll on the side sheet 11 side is embossed at a temperature near or above the melting point of the back sheet 3. Therefore, when the back sheet 3 is a polyethylene-based film and the intermediate layer 12 is a polypropylene-based SB nonwoven fabric or SMS nonwoven fabric, the roll on the back sheet 3 side is at a temperature of about 130 ° C. or less, and the roll on the side sheet 11 side is Embossing is performed at about 130 ° C. or higher. At the same time, the top sheet 2, the side sheet 11, and the back sheet 3 are compressed in the thickness direction along the outer edge of the absorbent article to form the round seal portion 10.

  As a ninth step, a cutting process is performed. The top sheet 2 and the like are cut according to the line of the product shape 40 shown in FIG. After the above steps, a step of applying an adhesive and providing a slip prevention material is provided. The absorbent article which concerns on this Embodiment can be manufactured according to said process.

(Modification 1)
FIG. 6 is a plan view seen from the front surface side of the absorbent article 1A according to Modification 1 of the present invention. FIG. 7 is an enlarged view of a portion B shown in FIG. In the following description of the modified example, parts having the same configuration as in the present embodiment are represented by the same reference numerals, and description thereof is omitted.

  The embossed wire according to the modified example 1 is configured by a plurality of embossed components. Specifically, the 2nd embossed line 22, the 3rd embossed line 23, and the 4th embossed line 24 are specifically comprised by the aggregate | assembly of several dotted | punctate pressing parts.

  The dot-like embossing components are arranged in a line and are not continuous with each other. According to the aggregate | assembly of a some dot-like embossing structure part, it can suppress that a hip flap part becomes too hard with an embossed line compared with the linear embossed line which continues in a line form. Therefore, it becomes easy to deform | transform a hip flap part flexibly along a body line, and it can make a hip flap part fit a body more.

  The first embossed line extends along the longitudinal direction, and is provided from the vicinity of the rear end of the wing portion 43 toward the rear end of the hip flap portion. For example, when the intermediate layer has a configuration capable of holding body fluid (for example, an air-through nonwoven fabric), when the body fluid diffuses from the center in the width direction toward the outside in the width direction through the first embossed wire. Thus, it is possible to suppress the body fluid from being diffused to the outer side in the width direction than the first emboss line by drawing the body fluid to the intermediate layer side.

  A plurality of embossed portions are arranged overlapping in the width direction. Specifically, the first embossed line overlaps with the second embossed line, the third embossed line, and the fourth embossed line in the width direction. The 2nd embossed line has overlapped with the 1st embossed line and the 3rd embossed line in the width direction. The third embossed line overlaps with the first embossed line, the second embossed line, and the fourth embossed line in the width direction.

  Since the embossed wires overlap in the width direction, for example, when the intermediate layer has a structure that can hold body fluid (for example, an air-through nonwoven fabric), the body fluid flows from the center in the width direction to the width direction outside of the absorbent article. In this case, body fluid is drawn in double or triple by the first embossed wire, the second embossed wire, the third embossed wire, and the fourth embossed wire, and the body fluid reaches the outer edge of the absorbent article. Can be prevented.

  Moreover, since the 1st embossed line 21 is extended along the longitudinal direction from the rear side edge part vicinity of the wing part WG, it was pressed from the width direction outer side to the width direction inner side by the wearer's leg in the wing part vicinity. In this case, it becomes a deformation base point. Since a plurality of emboss lines are provided by branching from the first emboss line 21, even when the wing part WG is largely deformed, it can be deformed with a plurality of emboss lines as a base point, and the entire hip flap part Can be flexibly deformed.

  The first embossed wire 21 is behind the rear end of the wing part WG and is separated from the rear end of the wing part WG, but is not limited to this configuration. For example, the first embossed line 21 may extend rearward from the rear end of the wing part WG.

  Round seal portions 10 are provided on the outer edges of both ends in the width direction of the absorbent article. The round seal part 10 is comprised by the some embossing structure part squeezed in the thickness direction. Specifically, the round seal part 10 is comprised by the aggregate | assembly of several point-like embossing structure parts. The dot-like embossing components are arranged in a line and are not continuous with each other.

  The dot-like emboss component constituting the round seal portion 10 is configured to have a different shape or depth from the dot-like emboss component constituting the emboss line. Specifically, the area of the embossing component of the embossed wire is larger than the area of the embossing component of the round seal part. Or the depth of the embossing structure part of an emboss line is deeper than the depth of the embossing structure part of a round seal part.

  Since the embossed wire is disposed inside the round seal portion so as to be substantially continuous, for example, when the intermediate layer has a configuration capable of holding bodily fluid (for example, an air-through nonwoven fabric), the absorbent article It is possible to prevent body fluid from flowing to the outer edge. Further, the user can clearly see the second embossed line, the third embossed line, and the fourth embossed line, and the embossed line capable of drawing body fluid is present inside the outer edge of the absorbent article. Can be recognized, and a sense of security that side leakage hardly occurs can be obtained.

  Furthermore, the embossed component of the embossed wire has a larger area or depth than the embossed component of the round seal part, and is easily noticeable. Therefore, a relatively embossed line can be made conspicuous. The user can easily notice the embossed wire that prevents side leakage inside the outer edge of the absorbent article, and can feel more secure.

  Moreover, it is desirable that the shape of the embossing component of the embossed wire and the shape of the embossing component of the round seal part are different. Note that the difference in the shape of the embossing component is a concept including not only a configuration having different outer shapes, such as a circular shape and a triangular shape, but also a similar shape having the same shape but different sizes. For example, when the intermediate layer is configured to hold body fluid (for example, an air-through nonwoven fabric), the body fluid can be drawn into the intermediate layer via an embossed wire. Therefore, by making the shape of the embossed component of the embossed wire different from the shape of the embossed component of the round seal part, the embossed wire that can draw body fluid is present inside the outer edge of the absorbent article. Can be recognized and a sense of security that side leakage hardly occurs can be obtained.

  The round seal part and the embossed line are arranged with a space therebetween. For example, if the round seal portion and the embossed wire are connected, the body fluid drawn by the embossed wire may propagate to the round seal portion. However, since the embossed line with the round seal part is separated, the body fluid drawn by the embossed line can be prevented from propagating to the round seal part, and the leakage of the body fluid can be suppressed.

(Modification 2)
Next, an absorbent article 1B according to Modification 2 will be described. FIG. 8 is a plan view seen from a part of the surface side of the absorbent article 1B according to the second modification. As for the absorbent article 1B shown in FIG. 8, the embossing structure part which comprises an embossing part has the figure embossing structure part 91 which shows a figure shape, and the pattern embossing structure part 92 which shows a pattern shape.

  The figure embossing structure part 91 is an embossing part which shows a figure shape. In addition, the figure shape is a concept including polygons such as points, lines, circles, triangles, and rectangles. The pattern embossing configuration part 92 is an embossing part indicating a pattern shape. The pattern shape is a concept including various patterns and pictures such as a star pattern, a heart pattern, a leaf pattern, and a floral pattern.

  The aesthetic appearance can be enhanced by having the pattern embossing component 92. Furthermore, the absorbent article 1B can be decorated in a cute manner, and the depressed mood of the user can be alleviated. Furthermore, the pattern embossing configuration part 92 is more conspicuous than the line-shaped embossing part, and the user can recognize that there is an embossing part that absorbs body fluid inside the round seal part 10. Therefore, the user can obtain a sense of security against side leakage more.

  Moreover, the area of the pattern embossing structure part 92 is larger than the area of the pattern embossing structure part 91. FIG. Therefore, the pattern embossing component 92 is more conspicuous than the symbol embossing component 91 and serves as a mark. For example, when the intermediate layer is configured to hold body fluid (for example, an air-through nonwoven fabric), when menstrual blood diffuses into the hip flap portion HF, the embossed wire draws menstrual blood and spreads. At that time, menstrual blood oozes into the pattern embossing component having a relatively large area, so that the user can visually recognize the pattern embossing component in which menstrual blood has oozed and judge the replacement time.

  The graphic embossing component 91 is arranged on a predetermined line, and the pattern embossing component is arranged offset from the line. The line is a concept including not only a straight line but also a curved line. The graphic embossing component 91 can be densely arranged by arranging the graphic embossing component 91 on a predetermined line. For example, when the intermediate layer has a configuration capable of holding bodily fluid (for example, an air-through non-woven fabric), it is possible to prevent the side leakage by drawing the bodily fluid with the graphic embossing component. In addition, by disposing the pattern embossing component 92 away from the line where the graphic embossing component 91 is disposed, the pattern embossing component 92 can be made conspicuous, and the aesthetics can be enhanced while ensuring the side leakage prevention function. be able to.

  The width dimension W92 orthogonal to the predetermined line of the pattern embossing component 92 is larger than the width W91 of the predetermined line. Since the width dimension orthogonal to the predetermined line of the pattern embossing component 92 is larger than the width of the line where the figure embossing component 91 is arranged, the pattern embossing component 92 can be made conspicuous and the aesthetics can be enhanced. . Moreover, since the area of the pattern embossing component 92 is large, even if body fluid penetrates the entire pattern embossing component 91, the body fluid may not penetrate the entire pattern embossing component 92. The replacement time can be grasped by the unit 92.

  Moreover, if the pattern embossing structure part 92 has shifted | deviated from the line in which the figure embossing structure part 91 is arrange | positioned, a deformation | transformation of a hip flap part can be stopped by the part in which the figure embossing structure part 91 is arrange | positioned. Specifically, when the hip flap part is deformed from the vicinity of the base of the wing part, the figure embossed part arranged in a certain line shape becomes the deformation base point. At this time, the deformation of the hip flap part is easily stopped at the place where the pattern embossing structure part deviated from the line of the figure embossing structure part 91 is disposed, and excessive deformation of the hip flap part can be suppressed. In addition, if the width | variety of the pattern embossing structure part 92 is larger than the width | variety of the figure embossing structure part 91, the pattern embossing structure part 92 will protrude from the line in which the figure embossing structure part 91 is arrange | positioned, and the deformation | transformation suppression effect of a hip flap part will be carried out. Can be obtained.

  Moreover, it is preferable that the pattern embossing structure part is arrange | positioned back rather than the line of the pattern embossing structure part. When the pattern embossing component is arranged behind the line of the pattern embossing component, it prevents the deformation from being transmitted to the rear when the hip flap part is deformed from the wing part side located at the front. it can.

  A plurality of graphic embossing components 91 are arranged adjacent to each other, and the pattern embossing components 92 are arranged between the graphic embossing components 91. The interval P1 between the pattern embossing component 92 and the graphic embossing component 91 is larger than the interval P2 between the graphic embossing components 91. By making the interval between the pattern embossing component 92 and the graphic embossing component 91 larger than the interval between the graphic embossing components 91, the pattern embossing component 92 can be made conspicuous and the aesthetic appearance can be enhanced.

  Moreover, the embossing structure part which comprises the round seal | sticker part 10 may contain the pattern embossing structure part 92. FIG. However, in order to prevent the outer edge of the absorbent article from opening, it is desirable that the outer edge embossed portion be provided without any gaps by means of dot-like or lattice-like embossed components.

  Moreover, the embossed wire which concerns on the modification 2 is provided in two rows spaced apart in the longitudinal direction. The embossed line located at the rear extends from the inner side in the width direction toward the outer side in the width direction toward the rear in the region in front of the maximum bulge portion HFM located at the outermost side in the width direction in the hip flap portion, and the hip flap In the region rearward of the maximum bulge portion HFM of the portion, it extends rearward from the width direction outer side toward the width direction inner side.

  The outer shape of the hip flap portion HF extends from the inner side in the width direction to the outer side in the width direction toward the rear substantially in front of the maximum bulge portion, and substantially rearward in the rear from the maximum bulge portion. It extends from the outer side in the width direction toward the inner side in the width direction. Since the embossed line is arranged along the outer shape of the hip flap part, it is possible to prevent leakage at the outer edge on the rear side of the hip flap part (particularly, the outer edge on the rear side of the maximum bulge part).

  Moreover, although the 1st embossed line extended backward from the rear side edge vicinity of the wing part is not provided in the embossed part which concerns on the modification 2, the 1st embossed line may be provided.

(Modification 3)
Next, an absorbent article 1C according to Modification 3 will be described. FIG. 9 is a plan view of a part of the absorbent article according to Modification 1 as viewed from the surface side. Absorbent article 1C shown in FIG. 9 has second embossed wire 22 and third embossed wire 23 as embossed portions. These embossed lines are constituted by a first embossing component 93 and a second embossing component 94, respectively.

  The first embossing component 93 is an embossing portion that extends at least in the front-rear direction, and the second embossing configuration portion 94 is an embossing portion that is located on the inner side in the width direction than the first embossing configuration portion 93 and extends at least in the front-rear direction. is there. The 1st embossing structure part 93 and the 2nd embossing part 94 have overlapped in the width direction. The state in which the first embossing component 93 and the second embossing unit 94 overlap in the width direction means that one part of the first embossing component 93 and one part of the second embossing component 94 are on a straight line extending in the width direction. This is the state where the part is located.

  Since the first embossing component 93 and the second embossing component 94 overlap in the width direction, for example, when the intermediate layer has a configuration capable of holding body fluid (for example, an air-through nonwoven fabric), the absorbent article When the body fluid flows from the center in the width direction to the outside in the width direction, the body fluid is drawn in double in each of the second embossed wire 22 and the third embossed wire 23, and the body fluid reaches the outer edge of the absorbent article. Can be prevented.

  Moreover, although the 1st emboss line extended backward from the rear side edge part vicinity of a wing part is not provided in the embossing part which concerns on a modification, the 1st emboss line may be provided.

(Modification 4)
Next, an absorbent article 1D according to Modification 4 will be described. FIG. 10 is a plan view seen from a part of the surface side of the absorbent article 1D according to Modification 4. In the absorbent article according to the modified example 4, the embossed component that forms the compressed groove 5 and the embossed component that forms the embossed line of the hip flap portion are the same or similar.

  Specifically, the shape of the embossing structure part which comprises the pressing groove 5 is the same as the shape of the embossing structure part of a hip flap part. The size of the embossed component of the compressed groove 5 may be the same as or different from the shape of the embossed component of the hip flap.

  Thus, it can be emphasized that body fluid can be absorbed not only in the main body part M but also in the hip flap part HF by making the embossed structure part of the hip flap part the same or similar to the embossed structure part of the compressed groove 5. , Can enhance the user's sense of security.

(Other embodiments)
Although the contents of the present invention have been disclosed through the embodiments of the present invention as described above, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art.

  For example, the embossed portion 20 according to the present embodiment is linear, but may be constituted by, for example, a plurality of dot-like aggregates arranged intermittently.

  Moreover, in this Embodiment, although described as providing the top sheet 2 and the side sheet | seat 11 separately, it is not limited to this. The top sheet and the side sheet can be integrally formed by extending the top sheet in the width direction from the main body part to the side flap part.

  In the present embodiment, the embossed portion 20 is formed only on the hip flap portion HF. However, the present invention is not limited to this. By forming the embossed portion in the wing portion WG, it is possible to facilitate the entrainment of the wearer in the underwear.

  In the present embodiment, the side sheet 11 and the intermediate layer 12 are separately provided. However, the present invention is not limited to this. For example, the side sheet can be formed by laminating materials having different melting points and folded back to the back sheet side to form the intermediate layer.

L: Longitudinal direction, T: Thickness direction, W: Width direction, M: Main body part, SF: Side flap part, WG ... Wing part, HF ... Hip flap part, 1 ... Absorbent article, 2 ... Top sheet, 3 ... Back sheet, 4 ... Absorber, 5 ... Squeeze groove, 6 ... Main body part stopper, 7 ... Peeling tape, 8 ... Hip flap part stopper, 9 ... Wing part stopper, 11 ... Side sheet, 12 ... Intermediate layer, 20 ... Embossed portion, 21 ... First embossed wire, 22 ... Second embossed wire, 23 ... Third embossed wire, 24 ... Fourth embossed wire

Claims (18)

An absorbent article comprising: a main body portion extending in the front-rear direction; and a side flap portion projecting outward in the width direction from the main body portion,
The main body includes a liquid-permeable surface layer, a liquid-impermeable back layer, and an absorber disposed between the surface layer and the back layer,
The side flap portion includes a side sheet extending from a width direction outer end of the surface layer to the width direction outer side, the back surface layer, and an intermediate layer disposed between the side sheet and the back surface layer,
The side flap portion includes a plurality of embossed portions in which the side sheet, the intermediate layer, and the back layer are pressed in the thickness direction by embossing,
The said intermediate | middle layer is an absorptive article containing the fiber whose melting | fusing point is higher than the said back surface layer.   The absorbent article according to claim 1, wherein the intermediate layer is an SB nonwoven fabric or an SMS nonwoven fabric mainly composed of polypropylene fibers, and the back layer is a film mainly composed of polyethylene.   The absorbent article according to claim 2, wherein the side sheet includes fibers having a melting point lower than that of the fibers forming the intermediate layer.   The absorbent article according to claim 3, wherein the side sheet is a through-air nonwoven fabric mainly composed of fibers having a core-sheath structure including polyethylene as a sheath.   The embossed portion includes a plurality of embossed lines extending in the front-rear direction of the absorbent article, and is formed so that a part of the plurality of embossed lines overlaps in the front-rear direction. The absorbent article according to item 1.   The said intermediate | middle layer is an absorbent article of any one of Claims 1-5 arrange | positioned over the front-back direction full length of the said side flap part.   The said intermediate | middle layer is an absorbent article of Claim 6 arrange | positioned inside the width direction outer side edge part of the said side flap part.   The absorbent article according to claim 7, wherein a hot melt adhesive is disposed between the side sheet and the intermediate layer, and a hot melt adhesive is disposed between the intermediate layer and the back layer. The embossed portion is composed of a plurality of embossed components squeezed in the thickness direction,
The absorbent article according to any one of claims 1 to 8, wherein the plurality of embossed components are arranged at intervals. A plurality of the embossed portions are provided,
The absorbent article according to any one of claims 1 to 9, wherein one embossed portion and another embossed portion overlap in the width direction.   The said embossing structure part is an absorbent article of Claim 9 which has a figure embossing structure part which shows figure shape, and a pattern embossing structure part which shows a pattern shape. The figure embossing component is arranged on a predetermined line,
The absorptive article according to claim 11 in which said picture embossing composition part is shifted and arranged from said line.   The absorbent article according to claim 12, wherein a width dimension of the pattern embossing component in a direction orthogonal to the predetermined line is larger than a width dimension of the predetermined line. A plurality of the figure embossing components are arranged adjacent to each other,
The pattern embossing component is disposed between the pattern embossing components,
The absorbent article according to any one of claims 11 to 13, wherein an interval between the pattern embossing component and the graphic embossing component is larger than an interval between the graphic embossing components.   The embossed line extends in front of the largest bulging portion located on the outermost side in the width direction in the side flap portion, extends from the inner side in the width direction toward the outer side in the width direction, and behind the largest bulging portion. The absorbent article according to any one of claims 1 to 14, which extends from the outer side in the width direction toward the inner side in the width direction. The main body has a main body surface sheet covering the main body absorber,
A main body embossed portion that squeezes the main body absorbent body and the main body surface sheet in the thickness direction is formed in the main body portion,
The absorbent article according to any one of claims 1 to 15, wherein an embossing component that constitutes the main body embossing part and an embossing component that constitutes the embossed line are the same or similar. A liquid-permeable surface layer, a liquid-impermeable back layer, and a main body including an absorber disposed between the surface layer and the back layer, and from the width direction outer end of the surface layer to the width direction outer side A method for manufacturing an absorbent article comprising: an extending side sheet; the back layer; and an intermediate layer disposed between the side sheet and the back layer and projecting outward in the width direction from the main body. Because
Adhering between the side sheet and the intermediate layer with a hot melt adhesive, and adhering between the intermediate layer and the back layer with a hot melt adhesive;
Simultaneously sealing the outer periphery of the absorbent article by embossing, and simultaneously pressing the side sheet, the intermediate layer and the back layer in the thickness direction by embossing in the side flap portion,
The said intermediate | middle layer is a manufacturing method of an absorbent article containing the fiber whose melting | fusing point is higher than the said back surface layer.   The embossing is performed by embossing the back surface layer at a temperature equal to or lower than the melting point of the back surface layer, and embossing the side sheet at a temperature equal to or higher than the melting point of the back surface layer. Manufacturing method for absorbent articles.

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