TW201620473A - Absorbent article - Google Patents

Abstract

The objective of the present invention is to provide an absorbent article which deforms easily to conform to the shape of the body and has an absorbent which does not tend to tear. This absorbent article (1) includes an absorbent (4), a cover sheet (5) at least a portion of which is joined to the absorbent (4) with an adhesive, and multiple slit portions (6) that extend through the cover sheet (5) and are formed partially into the thickness direction of the absorbent (4).

Description

Absorbent article

The present invention relates to absorbent articles.

An absorbent article such as a sanitary napkin or an incontinence pad is attached to the wearer's crotch and attached to the wearer. Therefore, it is desirable to be deformable along the shape of the wearer. In the absorbent article which is easily deformed into a shape along the body, Patent Document 1 discloses a sanitary napkin in which a body fluid absorbing absorbent layer is formed and a plurality of dicing lines having a plurality of broken lines are formed. Further, Patent Document 2 discloses a liquid absorbing layer in a region surrounded by a bonding pattern, and a sanitary napkin having a low rigidity portion formed by a dicing portion penetrating the absorbing layer is formed.

[prior technical literature] [Patent Document]

[Patent Document 1] Unexamined Japanese Patent Publication No. 4-51930

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2006-81558

In the sanitary napkins disclosed in Patent Documents 1 and 2, for the purpose of reducing rigidity, a cut portion is formed in the absorbent layer, and the cut portion is formed to penetrate the absorbent layer. However, when the absorbing layer is formed to completely penetrate the dicing portion of the absorbing layer, the rigidity of the absorbing layer can be lowered, but the strength of the absorbing layer itself is also lowered. Therefore, when the sanitary napkin is used for a long period of time, In the absorbent body, the absorbent layer is ruptured from the cutting portion, and the absorbing layer is displaced. As a result, the sanitary napkin is easily twisted during use, and the body fluid such as menstrual blood is induced to leak, or the wearer feels menstrual blood or the like. The uneasiness of body fluid leakage is generated.

Accordingly, it is an object of the present invention to provide an absorbent article which is easily deformed along a body shape and which is not easily ruptured by the absorbent body.

The absorbent article of the present invention comprises an absorbent body between the liquid permeable surface sheet and the liquid impermeable back sheet, and at least a part of the coated sheet joined to the absorbent body by an adhesive, and has the above-mentioned A plurality of slit portions are formed on the way to cover the thickness direction of the absorber.

In the absorbent article of the present invention, the plurality of slit portions are formed in the thickness direction of the absorbent body by passing through the coated sheet which is at least partially covered by the absorbent body. Therefore, when the coated sheet is conveyed and disposed, the absorbent sheet can be transported and disposed. The rigidity caused by the support is lowered and the rigidity of the absorber itself is lowered, so that the absorbent article can easily imitate the shape of the wearer's body. Deformation. As a result, the fit of the absorbent article to the wearer can be improved. Further, since the slit portion is formed in the thickness direction of the absorbent body, the absorbent body is not penetrated, so that the absorbent body can be easily deformed, and the strength of the absorbent body can be ensured, so that the absorbent article can be absorbed during use. The body is not easy to crack.

According to the present invention, it is possible to provide an absorbent article which is easily deformed along the shape of the body and which is not easily broken by the absorbent body even when used for a long period of time.

1‧‧‧Sanitary cotton (absorbent articles)

2a, 2b‧‧‧ side flakes

3‧‧‧Surface

4‧‧‧Acceptor

5‧‧‧ Covered sheets

6‧‧‧Slits

Fig. 1 is a plan view showing an absorbent article according to an embodiment of the present invention.

Fig. 2 is a plan view showing an absorbent body and a coated sheet of the absorbent article according to the embodiment of the present invention.

FIG 3 based central axis C _L partial cross-sectional view in longitudinal direction of the absorber 2 and the coated sheet shown extending along the D _L toward the FIG.

Fig. 4 (a) is a plan view showing an absorbent body and a coated sheet of the absorbent article according to another embodiment of the present invention. 4(b) and 4(c) are plan views each showing an absorbent body and a coated sheet used in the absorbent article according to another embodiment of the present invention.

Hereinafter, a preferred embodiment of the absorbent article according to the present invention will be described in detail with reference to the drawings.

Fig. 1 is a plan view showing a sanitary napkin 1 as an absorbent article according to an embodiment of the present invention. As shown in Fig. 1, the sanitary napkin 1 has a vertically long shape having a longitudinal direction D _L and a width direction D _W orthogonal to the longitudinal direction D _L in a plan view. The sanitary napkin 1 is composed of the following various members, that is, a pair of left and right liquid-impermeable side sheets 2a, 2b located on the side of the wearer's skin; and the side sheets 2a, 2b. a liquid-permeable surface sheet 3 composed of a non-woven fabric, a liquid-permeable plastic film, or the like, and a liquid-impermeable back sheet (not shown) on the side of the garment (that is, the side opposite to the skin surface side); An absorbent body 4 for absorbing a body fluid that retains menstrual blood or the like between the surface sheet 3 and the back sheet; and a liquid-permeable coating between the surface sheet 3 and the absorbent body 4 at least partially covering the absorbent body 4 Sheet 5.

Hereinafter, the absorbent body and the coated sheet used in the absorbent article of the present invention will be described in detail with reference to the drawings. Fig. 2 is a plan view of the absorbent body 4 and the covering sheet 5 used in the absorbent article (sanaming cotton 1) according to the embodiment of the present invention, and Fig. 3 is taken along the absorbent body 4 and the covering sheet 5 shown in Fig. 2. C _L of the central axis portion in the longitudinal direction of the cross sectional view D _L extends. As shown in Fig. 2, in the present embodiment, the absorbent body 4 and the covering sheet 5 are long in the longitudinal direction (MD direction) in the direction in which the longitudinal direction D _{L of the} absorbent article is aligned, and have a vertically long shape.

In the present embodiment, the absorber 4 is used in a fiber structure containing pulp and dispersed and held with a highly absorbent polymer, but it is used in the present invention. The absorbent body of the absorbent article of the present invention is not particularly limited as long as it has a function of absorbing and retaining a body fluid such as menstrual blood, and may be used in addition to the absorbent body in which a fibrous structure containing pulp is dispersed and held with a superabsorbent polymer. Any absorbent material such as non-woven fabric is used. Further, since the absorbent material is compressed by pressing or the like as the absorbent body, since the rigidity of the absorbent body is high, the absorbent body is not easily cracked during use of the absorbent article, and therefore it can be preferably used.

In the absorbent article of the present invention, the basis weight of the absorbent body is not particularly limited, but is preferably from 100 g/m ² to 500 g/m ² , and more desirably 150 g / from the viewpoints of liquid absorbability, flexibility, strength, and the like. m ² ~ 300g/m ² . Further, the thickness of the absorber is not particularly limited, but from the same viewpoint as described above, it is preferably 1.0 mm to 10.0 mm, more preferably 1.5 mm to 5.0 mm.

Further, in the present embodiment, the cover sheet 5 is made of synthetic fibers such as polyolefin fibers (for example, polyethylene or polypropylene) or polyester fibers (for example, polyethylene terephthalate). In the case of the liquid-permeable sheet of the absorbent article of the present invention, the coated sheet of the absorbent article of the present invention is not particularly limited as long as it can transmit a body fluid such as menstrual blood, and a plastic film or a woven fabric may be used in addition to the nonwoven fabric. Any sheet material such as.

In the case where the coated sheet is composed of a fiber structure such as a nonwoven fabric or a woven fabric, the basis weight of the fiber structure is not particularly limited, but is preferably 10 g/m from the viewpoints of liquid permeability, flexibility, strength, and the like. ² to 70 g/m ² , more preferably 20 g/m ² to 40 g/m ² . Further, the thickness of the coated sheet is not particularly limited, but is preferably from 0.1 mm to 5.0 mm, more preferably from 0.2 mm to 2.0 mm, from the same viewpoint as described above.

In the present embodiment, at least a part of the cover sheet 5 is joined to the absorber 4 by any adhesive such as hot melt adhesive. By the bonding of the absorber 4 and the covering sheet 5 via the adhesive, in the use of the absorbent article, the absorber 4 and the covering sheet 5 are less likely to be split starting from the slit portion to be described later. Further, in the absorbent article of the present invention, in order to integrate the absorbent body and the coated sheet, a pressure bonding means such as embossing or the like may be used in addition to the above-mentioned adhesive. In particular, when embossing is used in the integration of the absorbent body and the coated sheet, the absorbent body and the coated sheet are joined by a plurality of press portions formed by pressing a plurality of embossed pins, so that the absorbent body is less likely to be absorbed. The distortion and cracking caused by the separation of the body and the coated sheet, and the formation of the press portion having a high fiber density at a plurality of locations, so that the rigidity of the absorber becomes high, and the absorbent body is less likely to be cracked during use of the absorbent article. Happening.

In the present embodiment, the cover sheet 5 is disposed between the surface sheet 3 and the absorbent body 4. However, the coated sheet for the absorbent article of the present invention is not particularly limited as long as it is at least partially covered with the absorbent body. The desired absorbent property, strength, and the like are disposed at any position. For example, the coated sheet may be disposed between the absorbent body and the back sheet, or may be disposed to surround the entire absorbent body.

Further, the absorbent body 4 and the covering sheet 5 joined as described above have a plurality of slit portions 6 that penetrate the covering sheet 5 and are formed in the middle portion of the absorbent body 4 in the thickness direction D _T . As shown in FIG. 2 and FIG. 3, in one embodiment of the present invention, a plurality of linear slit portions 6 are disposed in a substantially uniform range of the absorber 4 and the cover sheet 5 in a plan view. In the present embodiment, the plurality of slit portions 6 are individually oriented in the lateral direction (CD direction) perpendicular to the longitudinal direction of the absorbent body 4 and the covering sheet 5 (that is, the longitudinal direction D _{L of the} absorbent article). That is, the absorbent article extends in the direction in which the width direction D _{w is} parallel.

In the absorbent article of the present invention, the length of the linear slit portion is not particularly limited, but is preferably 3 mm to 50 mm, more preferably 5 mm to 15 mm. When the length of the slit portion is 3 mm or more, the absorbent article is easily deformed along the curvature of the shape of the wearer's body. When the length of the slit portion is 50 mm or less, when the absorbent body receives the pressure from the outside of the width direction D _W In the case where the slit portion is opened and cracked, the durability of the absorbent article can be ensured.

The depth of the slit portion is not particularly limited, but is, for example, 0.05 mm to 5.0 mm, and preferably 0.1 mm to 3.0 mm from the viewpoint of ease of bending of the absorbent article. In the present specification, the depth of the slit portion means the distance between the plane along the surface having the slit portion and the deepest portion of the slit portion, specifically, the following measurement method. depth. (1) The absorber and the coated sheet having the slit portion (hereinafter referred to as "absorber or the like") are cut in a plane perpendicular to the direction in which the slit portion extends. (2) Observing the cross section of the absorber or the like which has been cut by an electron microscope such as a scanning electron microscope, and measuring the portion having the thickest portion between the adjacent two slit portions (hereinafter referred to as "the thickest portion" Thickness (mm) of the part). (3) Measure the thickness (mm) of the thickest part of any 10 parts, and use the average value as the thickest part average thickness. (mm). (4) When an electron microscope photograph or an image is used, the surface of the absorber or the like opposite to the surface having the slit portion is placed on the lower side, and when the absorber or the like is placed on the horizontal plane, the portion in contact with the horizontal surface is formed. The plane is assumed to be an imaginary bottom surface, and a plane parallel to the imaginary bottom surface, that is, a plane located at a position where the distance from the bottom surface coincides with the average thickness of the thickest portion is used as a virtual reference surface, and the imaginary reference surface is measured from the imaginary reference surface to the slit portion. The distance (mm) from the deepest part. (5) The distance (mm) from the virtual reference surface to the deepest portion of the slit portion is measured for any of the ten slit portions, and the average value thereof is defined as the depth (mm) of the slit portion.

Further, in the present embodiment, the plurality of slit portions 6 extend in a direction parallel to the width direction D _{W of the} absorbent article in a plane view angle. When a plurality of slit portions are extended in such a direction, the absorbent body is easily bent toward the longitudinal direction D _{L of the} absorbent article, and therefore, the absorbent article becomes easy to correspond to a portion having a large curvature of the wearer's body shape. The deformation can further improve the fit of the absorbent article to the wearer.

In the present embodiment, the plurality of slit portions 6 are arranged in a zigzag manner in a plan view from the absorbent body 4 and the covering sheet 5 in a substantially comprehensive range. When the plurality of slit portions are arranged in a zigzag shape as described above, the region in which the rigidity of the slit portion is not present in the absorber is not continuously formed in the longitudinal direction D _L of the absorbent article, so that the absorbent article becomes more easily transformed. Moreover, such an effect is not limited to the above-described zigzag arrangement, and for example, the slit portions that are adjacent to each other in the longitudinal direction D _{L of the} absorbent article may be disposed in the longitudinal direction D _L by a plurality of slit portions. Obtained on the part that always overlaps.

The means for forming the plurality of slit portions is not particularly limited, and any cutting means can be employed. For example, in the plurality of slit portions, the absorbent body and the coated sheet joined in the above-described manner can be conveyed by an arbitrary conveying means, and the circumferential surface of the cutting roller provided on the rotating sheet can be provided from above the coated sheet. A plurality of upper cutting edges are abutted to form. Further, it is possible to prevent the slit portion from penetrating the absorber by adjusting the clearance between the cutting blade of the cutting roller and the conveying means.

The method of forming the slit portion includes a process (a) of conveying the integrated cover sheet and the absorber by an arbitrary transfer means, and transporting the cover sheet and the absorber from above the cover sheet a process (b) of forming a plurality of slit portions by a plurality of cutting edges, wherein the slit portion penetrates the covering sheet and is formed in a portion in the thickness direction D _T of the absorber; and A method in which the sheet and the absorber remove the process (c) of the cutting blade.

In this method, a plurality of slit portions are formed in the process (b), but in this case, a portion between the bottom portion of the slit portion and the conveying means is pressed by the pressing force of the cutting blade. Since the high-density portion is formed, it is possible to accurately achieve the bending of the absorber with the high-density portion as a starting point, and it is possible to provide a comfortable wearing feeling for the wearer.

In the absorbent article of the present invention, the direction in which the slit portion extends is not limited to a direction parallel to the width direction D _W of the absorbent article, and includes a direction substantially parallel to the width direction D _W of the absorbent article. In the present specification, [the direction in which the width direction D _W of the absorbent article is substantially parallel] means that when a plurality of slit portions are formed to extend in such a direction, the absorber and the covering sheet act to easily have the aforementioned narrowness. In the direction in which the surface of the slit portion is bent (that is, it is easy to be folded inwardly on the side having the slit portion), for example, a direction of an angle of 0° or more and 45° or less is formed in the width direction D _W of the absorbent article at a plane angle of view. Further, in the present specification, the angle [45 ° or less than 0 ° in the width direction of the absorbent article D _W] by means D _W the width direction of the absorbent article in a parallel linear slit and the cross-section The smallest angle among the formed angles is an angle of 0° or more and 45° or less. Further, when the angle between the extending direction of the slit portion and the width direction D _{W of} the absorbent article is 45° or more, when the slit portion is formed, the fiber oriented in the width direction D _W of the absorbent article is formed in the absorbent body. It is easy to be cut, and therefore, the strength of the absorbent body in the width direction is lowered. On the other hand, when the extending direction of the slit portion is substantially parallel to the width direction D _W of the absorbent article, the absorbent body and the coated sheet are easily bent toward the surface side having the slit portion, so that it is easy to make The absorber and the cover sheet are deformed along the shape of the wearer's body, and the pulp or the like in the absorber can be prevented from being exposed from the slit portion.

Fig. 4 (a) is a plan view showing an absorbent body and a coated sheet of the absorbent article according to another embodiment of the present invention. In the present embodiment, the plurality of slit portions 6 extend in a direction from a plane of view to a predetermined angle of more than 0° and less than 45° in the width direction D _W of the absorbent article. When a plurality of slit portions are extended in such a direction, the absorbent body can be easily deformed toward the longitudinal direction D _{L of} the absorbent article, and the absorbent body can be prevented from being plural along the width direction D _W of the absorbent article. The case where the slit portion is split is generated. In addition, when the slit portion is formed, the transporting body and the covering sheet are obliquely cut in the conveying direction, so that the absorbent body and the covering sheet are oriented in the direction perpendicular to the opposite direction. In the case of the cutting, the force of pressing the cutting edge of the cutting roller can be reduced, and the plurality of cutting blades of the rotating cutting roller can be continuously pressed against the absorbent body and the covering sheet during transportation. It can reduce the wear and tear of the cutting blade, and can reduce the equipment cost.

Moreover, in the absorbent article of the present invention, the arrangement of the plurality of slit portions is not limited to the zigzag shape, and any arrangement may be employed in a range that does not impair the ease of deformation of the absorber, the strength of the absorber, and the like. For example, the plurality of slit portions may be arranged such that, in a plan view, there is no other slit portion on the extension line of one slit portion. When a plurality of slit portions are arranged in this manner, since a plurality of slit portions are arranged on the straight line, it is possible to prevent the plurality of slit portions arranged on the straight line from acting as a perforation line to cause the absorber to be split. The situation arises.

Fig. 4 (b) is a plan view showing an absorbent body and a coated sheet of the absorbent article according to another embodiment of the present invention. In this embodiment, the plurality of slit portions arranged in the longitudinal direction D _L of the absorbent article are oriented at a predetermined angle of more than 0° and less than 45° in the width direction D _W of the absorbent article in a plan view. The plurality of slit portions arranged in the same direction and arranged in the width direction D _W of the absorbent article are arranged to be alternately oriented in a zigzag shape. When a plurality of slit portions arranged in the width direction D _W of the absorbent article are alternately oriented and arranged in this manner, the ease of deformation of the absorbent body becomes less likely to be caused when all of the slit portions are oriented in the same direction and disposed. The absorbent article is offset in a certain direction other than the longitudinal direction D _L .

Fig. 4 (c) is a plan view showing an absorbent body and a coated sheet of the absorbent article according to another embodiment of the present invention. In this embodiment, includes a central axis C _L and a plurality of slit portions arranged in the longitudinal direction of the line D _L of the absorbent article in the longitudinal direction of the absorbent article extends D _L oriented in the width direction of the absorbent article D _W In a parallel direction, on both sides of the longitudinal direction D _L of the absorbent article, a plurality of slit portions arranged in the longitudinal direction D _L of the absorbent article are arranged to extend in the width direction D _W toward the absorbent article. the central axis C extending slit portion or _{W is} the width direction of the central axis C near the center of the _W D _W, D _L toward the longitudinal direction both end portions of the absorbent article is gradually inclined orientation. When a plurality of slit portions are disposed in this manner, the absorbent body can be configured to have both ends in the longitudinal direction D _L of the absorbent article, and the strength is higher, so that the durability as the absorbent body can be improved.

Moreover, as shown in FIG. 2, the absorbent article of the present invention has a width in which the length in the width direction of the absorbent body and the coated sheet is longer (both the case where the absorbent body and the coated sheet have the same width). It is preferable that the slit portion is not present at both edge portions of the direction D _W . Since the slit portion is not present in the both edge portions, the predetermined strength can be secured at the both edge portions, and therefore even between the edge portions in the width direction D _W of the absorbent article and the wearer's leg circumference When friction or the like is generated, the absorber also becomes less likely to crack.

The absorbent article of the present invention is protected from the absorbent body and the covering From the viewpoint of separation of the sheet, the absorber and the coated sheet are pressed by embossing or the like to be integrated, and a plurality of press portions can be formed. However, depending on the number and size of the plurality of press portions, there is absorption. The rigidity of the body becomes too high, causing the absorbent article to become less prone to deformation along the shape of the wearer's body. Therefore, when a plurality of press portions are formed in the absorber and the cover sheet, it is preferable that at least a part of the press portion overlaps the slit portion. By forming the slit portion in at least a part of the press portion, the rigidity of the absorber can be reduced. Therefore, the excessive rigidity of the absorber due to the plurality of press portions can be suppressed to a certain extent, and the absorbent article can be used as an absorbent article. Get the ideal fit.

Further, in the absorbent article of the present invention, the plurality of slit portions may be disposed only in a region of the absorber and a part of the cover sheet in a plan view. In this case, the plurality of slit portions are disposed only to reduce the rigidity. The location is better. For example, in the absorbent article of the present invention, in order to enhance the absorption performance of the discharge port abutment region where the wearer's excretory opening abuts, the amount of pulp in the absorbent body of the excretory opening abutment region may be blended with the surrounding There are many regions, but when the amount of pulp in the absorbent body is increased, the rigidity of the discharge port abutment region is increased. Therefore, by arranging a plurality of slit portions in the discharge port abutment region, the absorption of the absorbent article can be enhanced. The performance can also suppress the high rigidity of the absorber. Moreover, since the front side area and the rear area located on both end sides of the longitudinal direction D _L of the absorbent article are areas corresponding to the curvature of the body shape of the wearer, by the front area Or a plurality of slit portions are disposed in at least one of the rear regions, and the rigidity of the region corresponding to the portion of the wearer's body shape having a large curvature can be reduced, and the absorbent article can further enhance the wearer's body. The fit of the shape.

In the absorbent article of the present invention, the shape of the plane of view of the slit portion is not limited to the above-described linear shape, and any shape may be employed within a range that does not impair the ease of deformation of the absorber, the strength of the absorber, and the like. Examples of the shape of the slit portion include a curved line, a V-shape, a wave shape, a zigzag shape, a circular shape, and a polygonal shape.

The present invention can be applied to various types of absorbent articles such as pads, incontinence pads, and the like, in addition to the sanitary napkins applicable to the above embodiments. In addition, the absorbent article of the present invention is not limited to the above-described embodiment, and may be appropriately combined, changed, or the like without departing from the scope of the present invention.

1‧‧‧Sanitary cotton (absorbent articles)

2a, 2b‧‧‧ side flakes

3‧‧‧Surface

4‧‧‧Acceptor

5‧‧‧ Covered sheets

Claims (7)

An absorbent article comprising: a liquid permeable surface sheet; a liquid impermeable back sheet; an absorbent body between the surface sheet and the back sheet; and at least a portion of the cover bonded to the absorber by an adhesive A longitudinally elongated absorbent article of a sheet characterized by having a plurality of slit portions penetrating the covering sheet and formed in the thickness direction of the absorbent body. The absorbent article according to claim 1, wherein the slit portion extends in a direction substantially parallel to a width direction of the absorbent article in a plan view. The absorbent article according to claim 1 or 2, wherein the slit portion is not present in both of the widthwise direction of the absorbent body and the coated sheet in the width direction. The absorbent article according to claim 1 or 2, wherein the plurality of slit portions are disposed such that the end of the slit portion does not exist on the extension line of one slit portion in a plan view. An absorbent article according to claim 1 or 2, further comprising a plurality of press portions for joining said absorbent body to said coated sheet, said plurality of press portions comprising: at least a portion in a planar viewing angle a press portion that overlaps the slit portion. The absorbent article of claim 1 or 2, wherein the plurality of slit portions are disposed such that the slit portions adjacent to each other in the longitudinal direction of the absorbent article have a length direction in the longitudinal direction The part that always overlaps. The absorbent article according to claim 6, wherein the plurality of slit portions are arranged in a zigzag shape in a longitudinal direction of the absorbent article in a plan view.