TWI715588B - Individual package of absorbent articles - Google Patents

Abstract

The present invention is to provide an individual package of absorbent articles that can be easily formed into a folded shape and can easily return to a flat shape. The individual package of the absorbent article of the present invention has the following structure.

The individual packaging body (1) of the sanitary napkin (2) has a longitudinal direction and a width direction, and the folding line area (5) extending in the width direction is formed by combining the sanitary napkin (2) with an absorbent body (9) It is formed by folding together with the packaging sheet (3). The absorbent body (9) has one side and the other side. In the fold line area (5), at least one or more cuts into the absorbent body ( 9) The slit portion (12) formed in the middle of the thickness direction, the slit portion (12) has an opening extending in the width direction on the aforementioned one surface, and the absorbent body (9) is at least in contact with the slit portion ( 12) The position where the thickness direction of the absorber (9) is repeated is provided with a high-density section (15) compared to the portion where the slit section (12) does not overlap in the thickness direction of the absorber (9).

Description

Individual package of absorbent articles

The present invention relates to an individual package of absorbent articles.

It is proposed to arrange the sanitary napkin as an absorbent article on a packaging sheet and fold it several times to individually package the sanitary napkin. By packaging the absorbent articles individually, the absorbent articles can be carried in a simple, hygienic, and easy-to-carry state.

For example, Patent Document 1 describes a personal packaging body of an absorbent article, which is an absorbent article having a surface material, a back material, and an absorbent body interposed between the two materials, which are folded along the individual packaging fold lines, wherein A circumferential leak-proof groove is formed on the surface material side of the absorbent article, and the circumferential leak-proof groove has a constricted portion that enters the circumference in a plan view at the position of the individual packaging fold line, It also has an arc-shaped central groove extending in the width direction substantially parallel to the individual packaging fold line inside the circumferential leakage preventing groove, and the region having the central groove has the aforementioned narrowing portion and individual packaging fold line.

Patent Document 2 describes an absorbent article which is an absorbent body with liquid retention properties and arranged on the skin facing side of the absorbent body The surface sheet and the back sheet arranged on the non-skin facing side of the absorbent body, and are equipped with an absorbent body, which has: the excretion part facing part arranged to face the excretion part of the wearer during installation , The opposite part of the excretory part is arranged on the front of the wearer’s ventral side, and the opposite part of the excretory part is arranged on the back of the wearer’s back, and has the equivalent of the wearer’s Absorbent articles in the longitudinal direction of the front-rear direction and the transverse direction orthogonal thereto, wherein the back sheet has moisture permeability, the absorbent body is formed of a laminate of absorbent sheets, and the excretion part opposing part has excretion Part of the slit area, this area is a state where the slits forming the absorbent sheet that penetrates the surface sheet closest to the surface sheet are dispersed in both the longitudinal direction and the lateral direction, and the absorbent body has a multi-layered portion at the portion facing the excretion portion The multilayer part is a part where the number of laminated sheets of the absorbent sheet is larger than the part located around it. In the multilayer part, there is a through slit penetrating the absorbent body as the slit. The peripheral edge of the multilayer part is located outside, and the portion where the number of laminate sheets of the absorbent sheet is less than the multilayer part has the non-penetrating slit which penetrates the absorbent sheet closest to the surface sheet and does not penetrate the absorbent body.

[Advanced Technical Literature] [Patent Literature]

[Patent Document 1] JP 2010-178932 A

[Patent Document 2] Japanese Patent Application Publication No. 2015-024000

In the individual package of the absorbent article disclosed in Patent Document 1, the absorbent article has an arc-shaped central groove extending in the width direction and a fold line of the individual package, which is formed in the area having the central groove , And extend roughly parallel to the central groove. Therefore, the absorbent article of Patent Document 1 is easily folded at the central groove due to the difference in rigidity between the central groove and other parts. On the other hand, the absorbent article of Patent Document 1 plastically deforms when the central groove is welded to the sheet positioned above and below it. Therefore, when the user opens the package and unfolds the absorbent article into a flat shape The folded shape is maintained, and when the central groove is not welded to the sheet located at its upper and lower positions, peeling occurs in the layer and wrinkles are generated. Therefore, it is not easy to form a flat shape even when it is installed in any case. As a result, the absorbent article of Patent Document 1 has a poor fit feeling and tends to leak liquids such as menstrual blood.

In addition, the absorbent article disclosed in Patent Document 2 has a plurality of slits extending in the longitudinal direction (longitudinal direction) or the lateral direction (width direction). However, when the absorbent article has longitudinal slits, it is not folded into a single package. The bending start point in the configuration tends to easily deviate from the position of the fold line. Moreover, the absorbent article described in Patent Document 2 is easy to fold in the width direction of the absorbent article with the slit as the axis during installation. There is a tendency for liquid to easily leak out of the twisted absorbent article. In addition, when there are slits in the horizontal direction, if the rigidity of the absorbent article is too low, even if the package is opened and the absorbent article is to be unfolded into a flat shape, the absorbent article will remain folded. The user must make the absorbent article Return to the flat-shaped job.

The object of the present invention is to provide an individual package of absorbent articles that is easy to form a folded shape, and is also easy to return to a flat shape, improves the installation feeling in the fold area, and does not easily leak liquid.

The present inventors have found an individual packaging body of an absorbent article, which has a longitudinal direction and a width direction, and a folding line area extending in the aforementioned width direction is achieved by folding the absorbent article with the absorbent body together with the packaging sheet The individual packaging body of the formed absorbent article is characterized in that the absorbent body has one face and the other face, and at least one or more cut-in from the one face to the absorbent body is provided in the fold line area The slit portion formed in the middle of the thickness direction of the slit portion, the slit portion has an opening extending in the width direction on the one surface, and the absorbent body is at least overlapping with the slit portion in the thickness direction of the absorbent body The position is provided with a high-density portion compared to the portion where the slit portion does not overlap in the thickness direction of the absorbent body.

The absorbent article in the individual package of the present invention is provided with at least one slit portion in the fold line area, and the slit portion is provided in the width direction of the absorbent body. There is a difference in rigidity between the part with the slit part and the parts other than this. When folded into a package form, the slit part becomes the starting point of bending, and it is easy to form a folded shape. In addition, the slit portion is formed only in the middle of the thickness direction of the absorber, and since there are continuous regions in the longitudinal direction, the force (restoring force) to return to the flat shape is applied to easily return to the flat shape. Furthermore, the absorption of the present invention The sex article has a high-density part at least at a position that overlaps the slit part in the thickness direction of the absorbent body. Therefore, there is a difference in rigidity between the high-density part and its peripheral part. When folded into a single package, the high-density part It becomes the starting point of bending and is easy to form a folded shape. In addition, since the high-density portion increases the rigidity of the slit portion and the portion overlapping in the thickness direction of the absorbent body, the force (restoring force) for returning to the flat shape is applied, and the flat shape is also easily restored. In this way, since the absorbent article in the individual package of the present invention includes both the slit portion and the high-density portion, it has both the ease of forming a folded shape and the ease of returning to a flat shape.

The individual package of the absorbent article of the present invention can be easily formed into a folded shape and can easily return to a flat shape.

1. 1’‧‧‧Packing bodies

2, 2’‧‧‧Sanitary napkins

3‧‧‧Packing sheet

4‧‧‧Tongue

5‧‧‧Polyline area

6a, 6b‧‧‧Side sheet

7‧‧‧Surface sheet

8‧‧‧Inside sheet

9, 9’‧‧‧Absorber

10‧‧‧Coated sheet

11‧‧‧Squeeze Ditch

12, 12’‧‧‧Seam part

13‧‧‧Fixed part

14‧‧‧Concave

15‧‧‧High Density Department

Fig. 1 is a plan view of a state in which individual packages of the first embodiment of the present invention are expanded.

Fig. 2 is a plan view of the absorbent article of the individual package according to the first embodiment of the present invention.

Fig. 3 is a plan view of an absorber and a covering sheet used in the absorbent article of the individual package according to the first embodiment of the present invention.

Fig. 4 is a partial end view of the IV-IV end surface of the absorber and coating sheet shown in Fig. 3.

Fig. 5 is a partial end view of the V-V end surface of the absorber and the covering sheet shown in Fig. 3.

Fig. 6 is a perspective view of a state in which the individual package of the first embodiment of the present invention is folded in one fold line area.

Fig. 7 is a perspective view of a state in which the individual package of the first embodiment of the present invention is folded in a full-fold line area.

Fig. 8 is a partial cross-sectional view of the individual package in the first embodiment of the present invention in a folded state in a fold line region.

Fig. 9 is a plan view of an absorbent body of an individual package according to the second embodiment of the present invention.

[Forms for implementing invention]

The present invention relates to the following aspects.

[Pattern 1]

An individual packaging body of an absorbent article has a longitudinal direction and a width direction, and the fold line area extending in the width direction is formed by folding an absorbent article with an absorbent body and a packaging sheet together. An individual package of articles, characterized in that the absorber has one surface and the other surface, and in the fold line area, at least one is formed by cutting from the one surface to the middle of the thickness direction of the absorber The slit portion, the slit portion has an extension in the width direction on the one side The stretched opening, the absorbent body, is provided at least at a position where the slit part overlaps in the thickness direction of the absorbent body. The slit part does not overlap in the thickness direction of the absorbent body, and is a high-density part. .

The individual packaging body of the absorbent article described in aspect 1 is provided with at least one slit portion in the fold line area, and the slit portion is provided in the width direction of the absorbent body in the fold line area of the absorbent body, There is a difference in rigidity between the part provided with the slit part and the parts other than this. When folded into a package form, the slit part becomes the starting point of bending, and the folded shape is easily formed. In addition, the slit portion is formed only in the middle of the thickness direction of the absorber, and since there are continuous regions in the longitudinal direction, the force (restoring force) to return to the flat shape is applied to easily return to the flat shape. Furthermore, the absorbent article of the present invention is provided with a high-density portion at least at a position overlapping with the slit portion in the thickness direction of the absorbent body. Therefore, a difference in rigidity occurs between the high-density portion and the peripheral portion and is folded into one In the packaging form, the high-density part becomes the starting point for bending, and the folded shape is easy to form. In addition, since the high-density portion increases the rigidity of the portion overlapping with the slit portion in the thickness direction of the absorbent body, the force (restoring force) to return to the flat shape is applied, and the flat shape is also easily restored. In this way, the absorbent article in the individual package of the present invention has both the slit portion and the high-density portion, so it can achieve both the ease of forming a folded shape and the ease of returning to a flat shape. .

[Pattern 2]

In the aforementioned individual package, the aforementioned one surface is the skin-facing surface.

The individual package of the absorbent article described in aspect 2 has a slit portion formed on the skin facing surface side, so that the absorbent body is easily folded, and since the portion where the slit portion is not formed is turned sideways toward the skin non-opposing surface, Therefore, a force (restoring force) for returning to a flat shape is applied in the direction opposite to the direction in which the absorbent body is folded, and the fit feeling in the fold line area can be further improved.

[Pattern 3]

In the aforementioned packaging body, the slit portion has a depth of 70% or less of the thickness of the absorbent body.

In the individual package body of the absorbent article described in aspect 3, since the part without the slit portion occupies more than 30% of the thickness of the absorbent body, the force (restoring force) for restoring the flat shape is sufficiently exerted to further improve the fold line area Sense of installation.

[Pattern 4]

The aforementioned packaging body, wherein the absorbent body is provided with a position on the other surface that overlaps the slit portion in the thickness direction of the absorbent body and is formed from the other surface to the thickness direction of the absorbent body The recess in the middle.

The individual package of the absorbent article described in aspect 4 is provided with a recess at a position overlapping with the slit in the thickness direction of the absorber. Therefore, the rigidity difference between this part and the other part increases, and the package is folded into a single package. At this time, the slits and recesses become the starting point for bending, making it easier to form a folded shape.

[Pattern 5]

In the aforementioned packaging body, the high-density portion is formed from the outer peripheral surface of the recessed portion to the middle of the thickness direction of the absorbent body.

In the individual package of the absorbent article described in aspect 5, since the high-density portion is formed from the outer peripheral surface of the recessed portion to the middle of the thickness direction of the absorbent body, when the absorbent body is folded, the high-density portion expands and returns to a flat shape. Strength (resilience) further acts.

[Pattern 6]

The aforementioned individual packaging body, wherein the aforementioned individual packaging body is formed by folding the absorbent article and the packaging sheet together multiple times in a plurality of the fold-line regions, and the absorbent body includes at least one or more in each region of the fold-line region The aforementioned slits.

In the individual packaging body of the absorbent article described in aspect 6, when there are a plurality of fold-line areas, by providing at least one slit in each area, the absorbent body can be easily folded in any fold-line area.

[Pattern 7]

In the aforementioned packaging body, the absorbent body is provided with a plurality of the slit portions intermittently arranged in the width direction in the fold line region.

In the individual package of the absorbent article described in aspect 7, since the other sipes in the fold line area discontinuously extend on the extension of one sipe, Therefore, an area without the slit portion is formed on the same line, and the rigidity of the absorbent body can be maintained more than when a slit portion crosses the width direction.

[Pattern 8]

The aforementioned individual package, wherein the absorbent article is provided with a garment for fixing the absorbent article to a wearer on the garment abutting surface of the absorbent article, that is, in a non-folding area other than the folding area The fixed part used.

In the individual package of the absorbent article according to aspect 8, since when the absorbent article is folded, there is no fixing part in the fold line area on the non-opposing side of the skin of the absorbent article, so it does not prevent the absorbent body from returning to The force of the plane shape (resilience).

[Pattern 9]

In the aforementioned package, the opening has a curved shape protruding toward the end in the longitudinal direction.

In the individual package of the absorbent article described in aspect 9, the fold line is a line segment connecting the two ends of the slit portion or formed in a convex part to be induced to make the absorbent body easier to fold.

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

(First Embodiment)

1 to 5 are diagrams for explaining the first embodiment of the present invention. Fig. 1 is a plan view of a state in which a package 1 is unfolded. As shown in Fig. 1, when the individual package 1 is unfolded from the folded state, it has a longitudinal shape in plan view, and the shape has a longitudinal direction D _L and a width direction D _W orthogonal to the longitudinal direction D _L . The individual packaging body 1 is composed of various members including sanitary napkins 2, packaging sheets 3, and tongues 4 that are used as absorbent articles. The sanitary napkin 2 and the packaging sheet 3 respectively have a fold line area 5 in the _DW direction where they overlap in the thickness direction. As described later, the fold line area 5 is sequentially folded toward the inside, and the tongue piece 4 is used to clamp the package to make a package. Body 1.

In addition, although Figure 1 shows the case where there are two fold line areas 5, and the sanitary napkin 2 is folded into three folds, but according to the storage method of the sanitary napkin 2, the fold line area 5 can also have three or more, and its formation position is also Can be changed appropriately. In addition, in the fold line area 5, the distance from the fold line of the sanitary napkin 2 to the first end in the width direction, and the distance from the fold line of the sanitary napkin 2 to the second end in the width direction are all the same as those of the absorbent body 9. The thickness is the same length, and the fold line area 5 is an area surrounded by the first end and the second end.

In addition, in this specification, the thickness (mm) of the absorber is measured as follows.

Prepare FS-60DS [measurement surface 44mm (diameter), measurement pressure 3g/cm ² ] manufactured by Daiei Scientific Precision Manufacturing Co., Ltd., under standard conditions (temperature 23±2℃, relative humidity 50±5%), absorb Five different parts of the body were pressurized, the thickness of each part after 10 seconds of pressurization was measured, and the average of the five measured values was used as the thickness of the absorber.

Fig. 2 is a plan view of the sanitary napkin 2 of the individual package 1 according to the first embodiment of the present invention. As shown in FIG 2 in a plan view of the sanitary napkin 2 having a vertically long shape, and the shape having a longitudinal direction _L and D and the length _L direction D perpendicular to the width direction D _W. The sanitary napkin 2 is composed of a pair of liquid-impermeable side sheets 6a, 6b on the left and right sides of the wearer's skin surface; and a non-woven fabric on the clothing side of the side sheets 6a, 6b. , A liquid-permeable surface sheet 7 formed of a liquid-permeable plastic film, etc.; a liquid-impermeable back sheet 8 located on the clothing side (that is, the side opposite to the aforementioned skin facing side); located on the aforementioned surface sheet 7 and the inner sheet 8 between the absorbent body 9 that absorbs and retains body fluids such as menstrual blood; and the liquid-permeable coating sheet 10 located between the surface sheet 7 and the absorbent body 9 and at least partially covers the absorbent body 9 Of various components.

Moreover, as shown in FIGS. 1 and 2, the sanitary napkin 2 is formed with a substantially annular press groove 11. The pressing groove 11 is formed by pressing the surface sheet 7, the covering sheet 10, and the absorbent body 9 in the thickness direction. In the present embodiment, the pressing groove 11 is formed by pressing the skin facing surface of the surface sheet 7 of the sanitary napkin 2 and the skin non-facing surface of the absorber 9.

In addition, the squeeze groove 11 does not need to be ring-shaped, and the portion overlapping with the absorber 9 in the thickness direction may be formed in one or more linear shapes at both ends in the width direction _Dw of the sanitary napkin 2. However, it is desirable that the squeeze groove 11 is formed in the fold line area 5 substantially orthogonal to the slit portion 12 in a plan view, as described later. Here, "substantially orthogonal" means that the angle formed by the slit portion 12 and the press groove 11 in the fold line area 5 is not only a right angle (90°) when viewed from above, but also includes forming an angle of 45° or more but not 90°. Case.

The absorbent body and the covering sheet used in the sanitary napkin of the first embodiment of the present invention will be described in detail with reference to the drawings. 3 is a plan view of the absorbent body 9 and the covering sheet 10 used in the absorbent article (sanitary napkin 2) of the first embodiment of the present invention, and FIG. 4 is the IV of the absorbent body 9 and the covering sheet 10 shown in FIG. 3 -Part of the end view of the IV end face. Fig. 5 is a partial end view of the VV end surface of the absorber and the covering sheet shown in Fig. 3. 3, in this embodiment, the covering sheet 9 and 10 having a shape elongated absorbent, the shape is consistent with the long direction of the napkin length _L direction D 2.

In the present embodiment, although the absorbent body 9 can be one that allows the superabsorbent polymer to be dispersed and held in a fibrous structure containing pulp, the absorbent body used in the absorbent article of the present invention can absorb and retain body fluids such as menstrual blood. There are no particular restrictions on the function, and any absorbent material such as non-woven fabric can be used except for the one that allows the superabsorbent polymer to be dispersed and held in the pulp-containing fiber structure. In addition, in the case of an absorbent body, when the above-mentioned absorbent material is compressed by pressing or the like, since the absorbent body has high rigidity, the absorbent body is not easily broken during the use of a sanitary napkin, so it can be suitably used.

In the absorbent article of the present invention, the base amount of the absorber is not particularly limited as long as it is within the range of the base amount at the time of general use.

In addition, in this embodiment, although the covering sheet 10 can use polyolefin-based fibers (for example, polyethylene, polypropylene, etc.), polyester-based fibers (E.g., polyethylene terephthalate, etc.) liquid-permeable sheets such as non-woven fabrics formed of synthetic fibers, however, the covering sheet used in the absorbent article of the present invention can allow body fluids such as menstrual blood to permeate However, there is no particular limitation. In addition to the aforementioned non-woven fabrics, any sheet materials such as plastic films and woven fabrics can also be used.

When the covering sheet is formed of a fibrous structure such as a non-woven fabric or a woven fabric, the base weight of the fibrous structure is not particularly limited as long as the base weight of the fibrous structure is within the range of the base weight in general use. In addition, although there is no particular limitation on the thickness of the coating sheet, it is preferably 0.1 mm to 5.0 mm, and more preferably 0.2 mm to 2.0 mm.

In this embodiment, at least a part of the covering sheet 10 is joined to the absorber 9 with an arbitrary adhesive such as a heat-melting material. The absorber 9 and the covering sheet 10 are joined via an adhesive. In the use of the sanitary napkin 2, the absorber 9 and the covering sheet 10 are less likely to be broken as a starting point in the slits described later. Furthermore, in the absorbent article of the present invention, since the absorbent body and the covering sheet are integrated, in addition to the above-mentioned adhesive, a crimping means such as embossing may be used in combination. In particular, if embossing is used for the integration of the absorbent body and the covering sheet, the absorbent body and the covering sheet are joined by a plurality of press parts formed by pressing by a plurality of embossing pins, so the absorbent body The separation from the covering sheet makes the absorbent body twisted or difficult to break, and the squeezing part with high fiber density is formed in plural places, which increases the rigidity of the absorbent body. In the use of sanitary napkins, the absorbent body is broken. The situation is not easy to happen.

In this embodiment, the covering sheet 10 is arranged on the surface Between the sheet 7 and the absorbent body 9, the covering sheet used in the absorbent article of the present invention is not particularly limited as long as it is located at least partially covering the absorbent body. It can be arranged in accordance with the desired absorption performance, rigidity, etc. Any position, for example, even if the covering sheet is arranged between the absorber and the back sheet, it may be arranged so as to surround the entire absorber.

In addition, in this embodiment, although the structure of the sanitary napkin 2 having the covering sheet 10 is described, the covering sheet is not an essential component. For example, when the absorber itself has sufficient rigidity, the sanitary napkin may be configured to remove the covering sheet.

Moreover, the absorbent body 9 and the covering sheet 10 to be joined as described above are formed at least in the fold line region 5, and the penetration covering sheet 10 is formed on the skin facing surface from the surface contacting the covering sheet 10 to the absorber 9 The slit portion 12 in the middle part of the thickness direction D _T has an opening extending in the width direction. As shown in FIG. 3, in the first embodiment of the present invention, the slit portion 12 is arranged across the substantially entire surface of the absorbent body 9 and the covering sheet 10 in a plan view. In this embodiment, each of the plurality of slit portions in the slit portion 12 is a plan view, with respect to the longitudinal direction (i.e., longitudinal direction of the sanitary napkin 2 D _L) in the vertical transverse, i.e. the absorbent body covering sheet 9 and 10, It extends in a direction parallel to the width direction D _{w of} the sanitary napkin 2. In addition, on the same line in the width direction, the slit portions 12 and the non-slit portions 120 alternately exist.

In the absorbent article of the present invention, although the length of the slit portion is not particularly limited, it is desirably 3 mm to 50 mm, and more desirably 5 mm to 15 mm. If the length of the slit portion is 3 mm or more, the rigidity of the absorber can be reduced, and the absorber can be easily folded. On the other hand, if the length of the slit part is less than 50mm, the part where the slit part is not formed is left at the end of the absorbent body in the width direction, and the restoring force when the absorbent article is unfolded from the folded state can be exerted. When wearing an absorbent article, the absorber can maintain rigidity to the extent that it can withstand the pressure in the width direction _DW . However, considering the ease of folding of the absorbent article in the fold line area, the ratio of the length of the absorbent body in the width direction that occupies the total length of the slits on the same line in the width direction is ideally 30 to 80% , The more ideal is 40~70%, and the more ideal is 50~60%.

As shown in FIGS. 4 and 5, in the present embodiment, the slit portion 12 is formed through the covering sheet 10 from the skin-facing surface and formed from the surface in contact with the covering sheet 10 to the middle of the thickness direction D _T of the absorber 9 section.

Although the depth of the slit portion of the absorbent body in the present invention is not particularly limited, it is, for example, 0.05 mm to 5.0 mm, and more preferably 0.1 mm to 3.0 mm from the viewpoint of ease of folding of the absorbent article. In addition, the thickness of the slit portion is 70% or less of the thickness of the absorber, or may be half or less of the thickness of the absorber.

In addition, in this specification, the depth of the slit portion refers to the distance from the deepest part of the slit portion along a plane having the surface on the side of the slit portion. Specifically, it refers to the following measurement method: depth. (1) The absorbent body and the covering sheet (hereinafter referred to as "absorbent body etc.") having the slit part are cut in a plane that intersects perpendicularly to the extending direction of the slit part. (2) Observe the cross-section of the cut absorber with an electron microscope such as a scanning electron microscope, and measure the position of two adjacent thin The thickness (mm) of the thickest part between the seams (hereinafter referred to as "thickest part"). (3) Measure the thickness (mm) of the thickest part at any ten locations, and use the average value as the average thickness (mm) of the thickest part. (4) Using electron micrographs or images, when placing the absorber or the like on a horizontal surface with the surface opposite to the surface with the slit portion of the absorber etc. as the lower side, assume that the plane formed by the part that touches the horizontal surface is The imaginary bottom surface, and in a plane parallel to the aforementioned imaginary bottom surface, the plane located at the position where the distance from the aforementioned bottom surface coincides with the average thickness of the aforementioned thickest part is assumed to be the virtual reference surface, and the imaginary reference surface is measured to the deepest part of the sipe The distance (mm). (5) For any 10 sipes, measure the distance (mm) from the aforementioned virtual reference surface to the deepest part of the sipe, and use the average value as the depth (mm) of the sipe.

In addition, in this embodiment, each of the sipes of the plurality of sipes 12 extends in a direction parallel to the width direction _{Dw of} the sanitary napkin 2 when viewed in plan. When a plurality of slit portions extending toward such a direction, the length direction of the absorbent body towards readily D _L of the sanitary napkin 2 is bent, folded in a folding line region 5 easily.

As shown in FIG. 3, in this embodiment, the several slit part 12 is arrange|positioned in a staggered shape across the substantially whole surface of the absorber 9 and the covering sheet 10 in a plan view. In addition, the plurality of slit portions 12 extend discontinuously on the extension line of one slit portion in a plan view, that is, they are intermittently arranged in the width direction of the absorber 9. If a plurality of slit portions arranged so as not to be continuously formed in the longitudinal direction D _L of the sanitary napkin 2, the sanitary napkin 2 is more easily deformable in the region of the absorbent body with high rigidity slit portion 12 does not exist, allowing the sanitary napkin 2 Improved wearability. Further, this effect is not limited to the above-described configuration staggered form, for example, possible to form a plurality of slit portions arranged adjacent to a longitudinal direction of the napkin D 2 _L of the slit portion so as to overlap each other in having a normally _L of the long direction D section.

In addition, in the absorbent article of the present invention, the arrangement of the plurality of slits is not limited to the above-mentioned staggered shape, and any arrangement can be adopted within a range that does not impair the ease of deformation of the absorbent body and the rigidity of the absorbent body. form.

There are no particular restrictions on the means for forming a plurality of slits, and any cutting means can be used. For example, a plurality of slits are provided on the peripheral surface of the rotating cutting roller while conveying the joined absorbent body and the covering sheet by arbitrary conveying means as described above, and pressing against the covering sheet from above. It can be formed by multiple cutting knives. In addition, by adjusting the distance between the cutting blade of the cutting roller and the conveying means, the slit portion can be formed without penetrating the absorber.

As a method of forming the aforementioned sipes, there can be mentioned: the process (a) of conveying the integrated covering sheet and absorbent body by any conveying means; by conveying the covering sheet and absorbent body while moving from the aforementioned The process (b) of forming a plurality of slits formed in the middle part of the thickness direction D _T of the absorbent body through the covering sheet by pressing a plurality of cutting blades against the upper part of the covering sheet; and from the covering sheet and the absorbent body Process (c) method of removing the aforementioned cutting knife.

In this method, in the aforementioned process (b), although the aforementioned plural slits are formed, at this time, the pressing force of the aforementioned cutting knife is used to press The part between the bottom of the sipe part and the conveying means can form a high-density part. Therefore, the absorbent body can be folded with the high-density part as the starting point with high accuracy, and it can provide the wearer with a comfortable fitting feeling. .

In addition, the high-density portion is a portion having a higher fiber density than a portion that does not overlap in the thickness direction of the absorbent body with the slit portion as described later. In addition, the comparison of the fiber density is performed, for example, by observing the measurement target part with an electron microscope and comparing the maximum diameter of the inter-fiber voids in the part.

In the absorbent article of the present invention, the direction in which the slits extend 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 this specification, the "direction that is substantially parallel to the width direction D _{W of the} absorbent article" means that when a plurality of slits are formed and extended in such a direction, the absorbent body and the covering sheet are likely to function as the aforementioned The surface side of the slit portion is folded (that is, it becomes easy to fold toward the surface side with the slit portion). For example, it is desirable to form an angle of 0° or more and less than 30° with respect to the width direction D _{W of the} absorbent article The direction is more preferably a direction that forms an angle of 0° or more and less than 20°, and more preferably a direction that forms an angle of 0° or more and less than 10°. In addition, in this specification, "an angle of 0° or more and less than 30° with respect to the width direction D _{W of the} absorbent article" means that a straight line parallel to the width direction D _W of the absorbent article intersects the slit The smallest angle among the formed angles is 0° or more and less than 30°. In addition, if the extending direction of the slit portion and the angle formed by the width direction D _W of the absorbent article are greater than 30°, when the slit portion is formed, it is easy to cut in the absorbent body aligned with the width direction D of the absorbent article Because of _W fibers, there is a concern that the rigidity in the width direction of the absorber may decrease. On the other hand, if the extending direction of the slit portion is substantially parallel to the widthwise direction D _{W of the} absorbent article, since the absorbent body and the covering sheet are easily folded toward the side having the slit portion, it is possible to allow The absorbent body and the covering sheet are easily deformed along the body shape of the wearer, and it is possible to prevent the pulp and the like in the absorbent body from being exposed from the aforementioned slits.

In addition, as shown in FIGS. 4 and 5, in this embodiment, the absorber 9 further includes a recess formed from the non-facing surface of the skin to the middle of the thickness direction at a position corresponding to the slit portion 12 in the thickness direction of the absorber 9 14. In the absorbent article of the present invention, the structure of the recessed portion is not particularly limited as long as it does not impair the ease of folding of the absorbent body. However, the length of the recessed portion in the width direction is based on the ease of deformation following the body shape. It is, for example, between 3 mm and 60 mm, and ideally between 5 mm and 20 mm. In addition, the length in the longitudinal direction of the recess is also not particularly limited, but it is, for example, 0.1 mm to 5 mm, and preferably 0.5 mm to 2 mm. If the width of the recess is within such a range, it will easily function as a starting point when the absorber is bent.

In the absorbent article of the present invention, the depth of the recess is not particularly limited, but from the point of ease of folding of the absorbent body, it is, for example, 0.05 mm to 5.0 mm, more preferably 0.1 mm to 3.0 mm. In addition, in this specification, the depth of the recess refers to the distance between the surface opposite to the surface having the slit portion of the absorbent body 9 and the deepest part of the recess, and can be determined by the same depth as the aforementioned slit portion. The measurement method is obtained. That is, in the above-mentioned method of measuring the depth of the slit portion, the distance from the virtual bottom surface to the concave portion is measured The distance (mm) of the deepest part, and the average value of the measured values of the above-mentioned distances performed on arbitrary 10 recesses is taken as the depth (mm) of the recesses.

In addition, in the sanitary napkin 2, the depth of the slit portion 12 is deeper than the depth of the recessed portion 14. Since the depth of the slit portion 12 is set to be deeper than the depth of the recessed portion 14, and the absorbent body 9 is bent toward the side with the slit portion 12, the aforementioned slit portion can prevent the pulp and the like in the absorbent body 9 from being exposed. In case, as a result, durability as an absorber can be improved.

In the absorbent article of the present invention, the shape of the concave portion in a plan view is not particularly limited, but it is desirable that it has substantially the same shape as the slit portion 12. If the slit part and the recessed part have substantially the same shape in a plan view, the part between the slit part and the recessed part can be used as a starting point to fold the absorbent body accurately. In addition, in this specification, substantially the same shape means that each shape is the same kind of shape, and the centerline of each shape overlaps with each other.

The recesses in the sanitary napkin 2 of the first embodiment of the present invention can be easily formed by, for example, pressing means such as embossing. If the aforementioned recessed portion is formed by pressing means such as embossing, the portion between the bottom of the slit portion 12 that does not penetrate and the recessed portion 14 is squeezed in the thickness direction of the absorbent body 9 to increase the density because the high-density portion 15 and Since the difference in rigidity between the peripheral parts occurs, the high-density portion 15 becomes the starting point of folding of the absorbent body 9 and easily restores the absorbent body 9 to a flat shape. In addition, by increasing the density of the portion between the bottom of the slit portion 12 and the recessed portion 14, the region having the slit portion 12 of the absorbent body 9 can be strengthened, so that the durability as an absorbent body can be improved.

In addition, the aforementioned squeezing means may also be used as the aforementioned means for forming the slit portion 12. That is, the recessed portion 14 may be formed at the same time as the slit portion 12. That is, in the process of forming the aforementioned slit portion 12 (the aforementioned process (b)), the portion between the bottom of the slit portion 12 and the aforementioned conveying means is squeezed by the pressing force of the cutter blade to form a high-density portion At the same time, the absorber 9 is deformed to be convex downward with the contact point of the cutting blade (that is, the bottom of the slit portion 12) as the center. Moreover, the absorbent body 9 deformed in this way, in the aforementioned process (c), if the pressing force of the cutting blade is removed, although the elastic force of the fibers constituting the absorbent body 9 is restored to its original shape, the slit portion 12 The high-density part 15 between the bottom part and the aforementioned conveying means is squeezed and will not be restored, so that the part is maintained adjacent to the bottom of the slit part 12, so a recess 14 centered on this part is formed in the absorber 9 It has a surface on the side of the aforementioned conveying means (that is, a surface on the opposite side to the surface having the slit portion 12).

According to this method, since the positions corresponding to the slit portion 12 and the recessed portion 14 in the thickness direction of the absorbent body 9 are formed to have substantially the same shape in a plan view, it is possible to accurately realize the gap between the bottom of the slit portion 12 and the recessed portion 14. The part is used as the starting point for the folding of the absorbent body, and can provide the wearer with a comfortable installation feeling. In addition, since the high-density portion 15 is formed between the bottom of the slit portion 12 and the recessed portion 14, the same effect as when the pressing means such as embossing described above is used can be obtained.

Next, the state in which the sanitary napkin 2 of the first embodiment of the present invention is folded together with the packaging sheet 3 will be described with reference to the drawings. Figure 6 is the sanitary napkin 2 and packaging of the first embodiment of the present invention The sheet 3 is a perspective view of a state in which the sheet 3 is folded together in a fold line area 5. FIG. 7 is a perspective view of the sanitary napkin 2 and the packaging sheet 3 of the first embodiment of the present invention in a state in which the sanitary napkin 2 is folded in the full line area 5 together. As shown in FIG. 6, a fold line area 5 is formed at a position where the longitudinal end 16 when the sanitary napkin 2 and the packaging sheet 3 are folded in another fold line area is not overlapped. The fold line area 5 is formed in such a position, and as shown in FIG. 7, even if the sanitary napkin 2 and the packaging sheet 3 are folded in the full fold line area 5, the long-direction end 16 that was folded first will not be again in the fold line area 5. In the case of being rolled up, the formed individual package 1 does not become bulky.

Fig. 8 is a partial cross-sectional view of the individual package 1 according to the first embodiment of the present invention in a state where a folding line region 5 is folded halfway. When the individual package 1 is folded in the fold line area 5, if the angle θ formed by the surface sheets 7 on the skin-facing surface decreases, the surface sheet 7 starts to peel off from the absorbent body 9 in the fold line area 5, and slightly bulges . In addition, the surface sheets 7 on the skin-facing surface are in contact with each other, and if pressure is applied near the fold line area 5, the raised surface sheets 7 are broken. In this way, the surface sheet 7 generates the aforementioned raised portion when folding the sanitary napkin 2 to hinder the ease of folding of the sanitary napkin 2, and after folding the sanitary napkin 2, the folded shape is maintained by the destruction of the aforementioned raised portion. The same phenomenon may also occur in the inner sheet 8, the packaging sheet 3, and so on.

On the other hand, the absorbent body 9 of the sanitary napkin 2 is provided with a slit portion 12, and the slit portion 12 is formed at least in the fold line region 5 by penetrating the covering sheet 10 in the width direction to the halfway portion in the thickness direction of the absorbent body 9 , In the longitudinal direction of the fold line area 5, the portion where the slit portion 12 is provided and The parts other than this have poor rigidity, and when folded into a single package form, the slit portion 12 becomes the starting point of bending, and the folded shape is easily formed. In addition, since the slit portion 12 is cut into the skin-facing surface of the absorber 9, swelling in the surface sheet 7 is not generated, and the ease of folding of the sanitary napkin 2 is not hindered.

Furthermore, the absorber 9 is provided with a high-density portion 15 at least at a position overlapping with the slit portion 12 in the thickness direction of the absorber. Therefore, a difference in rigidity occurs between the high-density portion 15 and its peripheral portion, and is folded into a package In the configuration, the high-density portion 15 becomes the starting point of bending, and is easy to form a folded shape. In addition, the aforementioned high-density portion 15 increases the rigidity of the portion where the slit portion 12 overlaps in the thickness direction of the absorber 9, and therefore, the force (restoring force) to return to the planar shape acts as a force to make the absorber 9 9 The mechanical elements function when returning to a flat shape.

In addition, the region including the high-density portion 15 is formed in an arc shape from the outer peripheral surface of the concave portion 14 to the middle of the thickness direction of the absorber 9. If the area containing the high-density portion 15 is formed in this way, when the absorbent body 9 is folded, the area containing the high-density portion 15 and the U-shaped spring extend in the opposite direction to the bending direction, and the absorbent body 9 returns to its flat shape. Strength (resilience) further acts.

In addition, the high-density portion 15 is formed in the portion that does not penetrate the bottom of the slit portion 12 and the recessed portion 14 in the thickness direction of the absorbent body 9, and the area containing the high-density portion 15 is formed from the outer peripheral surface of the recessed portion 14 in an arc shape. The middle density part other than the high density part 15 midway in the thickness direction of the absorber 9 is formed. In addition, the region other than the region containing the high-density portion 15 in the absorbent body 9 is Low density part.

In addition, in this embodiment, although the structure in which the absorber is provided with the recessed portion 14 is described, in other embodiments, the absorber does not have the recessed portion 14, and the base weight of the absorber is high only in the portion where the slit portion overlaps in the thickness direction. By uniformly pressing the absorber, an area containing a high-density portion is formed.

The depth of the slit portion in the present invention is half or less of the thickness of the absorber 9 as described above, or may be 70% or less. When the slit portion 12 is formed in this way, since the portion where the slit portion 12 is not formed occupies more than half or 30% of the thickness of the absorbent body 9, the force (restoring force) to return to the flat shape is sufficiently applied, which can further improve The installation feeling of the sanitary napkin 2 in the fold line area 5.

The folding line area in the present invention may be formed in plural at positions where the absorbent article and the packaging sheet overlap. At this time, it is desirable that at least one slit part is formed in each fold line area. If the slits are formed in this way, the absorbent body is easily folded in any folding line area.

In addition, as described above, the slit portion may be formed as another slit portion that intermittently extends on an extension line in the width direction of the slit portion. The sipes are formed in this way, because the other sipes in the fold line area discontinuously extend on the extension line of a sipe, so the non-slits are on the same line in the width direction, but are in the width direction than a sipe. The continuous extension of the upper part can maintain the rigidity of the absorber. In addition, the portion where the slit is not formed is left in the width direction of the absorbent body, and the restoring force when the absorbent article is unfolded from the folded state can be exerted.

As shown in Figure 8, the sheet 8 is inside and the packaging sheet 3 The facing surface (that is, the non-skin facing surface or the clothing abutting surface) is formed with fixing parts 13 and 13 for wearing the sanitary napkin 2 so as to be immovably attached to the clothes of a wearer such as underwear. The fixing portions 13 and 13 are formed by applying a hot-melt adhesive to a predetermined position of the clothing contact surface of the back sheet 8, for example.

The fixing portions 13 and 13 are the garment contact surfaces of the sanitary napkin 2 and are formed in areas other than the area where the fold line area 5 and the slit portion 12 overlap. The fixing parts 13 and 13 are formed in such areas. Therefore, when the sanitary napkin 2 is folded, the fixing parts 13 and 13 do not exist in the folding line area 5 of the garment abutment surface of the sanitary napkin 2, so that the absorbent body 9 is not blocked. The force to return to a flat shape (resilience). If the fixing parts 13 and 13 exist in the folding line area 5 of the garment abutting surface of the sanitary napkin 2, the fixing parts 13 and 13 are stretched in the state where the sanitary napkin 2 is folded, and the state can be maintained. Moreover, as the fixing portions 13 and 13 are extended, a path difference is generated between the surface sheet 7 and the inner sheet 8, and the inner sheet 8 is easily maintained in a folded state, and the sanitary napkin 2 is not easily restored to a flat shape. As a result, , The installation feeling of the sanitary napkin 2 becomes worse.

In addition, as shown in Fig. 2, in the sanitary napkin 2 of the first embodiment of the present invention, the slits 12 do not exist at both edges in the width direction _DW of the absorber 9. There are no such slits at the two edges, so the absorbent body 9 can ensure predetermined strength at the two edges. Therefore, even at both edges of the sanitary napkin 2 in the width direction D _W and the wearer’s leg circumference The absorbent body is not easily broken due to friction and the like, and the part where the slit 12 is not formed is left at the end of the absorbent body in the width direction, and the restoring force when the sanitary napkin 2 is unfolded from the folded state .

In the absorbent article of the present invention, from the viewpoint of preventing separation of the absorbent body and the covering sheet, although the absorbent body and the covering sheet are squeezed and integrated by embossing or the like, a plurality of press parts can be formed, but according to the plurality of The number and size of the squeezing part may cause the rigidity of the absorbent body to become too high, and the absorbent article may not be easily deformed following the shape of the wearer's body. Therefore, when the absorbent body and the covering sheet form a plurality of press sections, it is desirable that at least a part of the press section is overlapped with the slit section. Since the slits are formed in at least a part of the press section, the rigidity of the absorber can be reduced. Therefore, it is possible to suppress the excessive increase in rigidity of the absorber caused by the plural press sections within a certain range. In the case of absorbent articles A suitable fit can be obtained.

In addition, in the sanitary napkin 2 of the first embodiment of the present invention, at least one slit portion 12 in the squeezing groove 11 and the folding line region 5 is formed perpendicular to the plane direction as described above. The pressing groove 11 formed in this way strengthens the rigidity of the sanitary napkin 2 in the longitudinal direction, so that when the sanitary napkin 2 in the flat shape returns to the flat shape, the force (restoring force) to return to the flat shape can be fully applied, and the fold line area 5 can be further improved The sense of installation of sanitary napkin 2.

In addition, in the absorbent article of the present invention, the plurality of slits may be arranged only in a part of the absorbent body and the covering sheet. In this case, the plurality of slits may be arranged only in the fold line area to reduce rigidity. Place. For example, the absorbent article of the present invention is designed to improve the absorption performance of the excretion opening contact area of the wearer's excretion opening. Although more of the excretion opening contact area of the absorbent body can be deployed than the peripheral area The amount of pulp, however, if the amount of pulp in the absorber increases, it is because the area where the excretion abuts Since the rigidity becomes higher, arranging a plurality of slits in the abutment area of the excretion opening can improve the absorption performance of the absorbent article and suppress the increase in rigidity of the absorbent body. In addition, the front area and the back area located at the both ends of the absorbent article in the longitudinal direction are the areas corresponding to the curvature of the wearer’s body shape. Therefore, the areas in the front area or the back area A plurality of slits are arranged in at least one area, and the rigidity of the area corresponding to the portion with a large curvature of the wearer's body shape is reduced, and the fit of the absorbent article to the wearer's body shape can be further improved.

(Second Embodiment)

Fig. 9 is a plan view of the absorber 9'of the individual package 1'according to the second embodiment of the present invention. The absorber 9'in this embodiment has the same structure as the above-mentioned embodiment except for the aspect in which the slit portion 12' is formed. In this embodiment, the slit portion 12' is provided with one or more convex shapes facing the longitudinal end portion 17 of the absorber 9'in the fold line area.

As long as the slit portion 12' in the present embodiment is provided in a region other than the two edge portions in the width direction _DW of the absorber 9', the length and curvature can be changed as appropriate. In this way, the sipes 12' do not exist at the two edge portions. As described above, because the predetermined strength can be ensured at the two edge portions, even the two edges of the sanitary napkin 2'in the width direction D _W and the wearer Friction between the legs, etc., the absorbent body is not easy to break, and at the end of the width direction of the absorbent body, the part where the slit portion 12' is not formed is left, and the sanitary napkin 2'can be unfolded from the folded state. Time resilience.

In this way, by continuously forming in the width direction of the sanitary napkin 2’ In the shape of a curved slit portion 12', the fold line of the absorbent body 9'will be formed as a line connecting the start and end points of the slit portion 12', or formed on a convex part to induce it, making it easier to fold the absorbent body 9' .

In the absorbent article of the present invention, the shape of the slit portion in a plan view is not limited to the above-mentioned embodiment, and any shape can be adopted within the range that does not impair the ease of deformation of the absorbent body and the strength as the absorbent body . As for the shape of such a slit portion, for example, a V-shape, a wave shape, a sawtooth shape, a circular shape, and a polygonal shape can be mentioned.

Also, in the first and second embodiments, although the case where the slits 12, 12' are formed on the skin facing surface, the slits in the individual packages according to other embodiments of the present invention are formed On the non-opposing side of the skin. At this time, in the fold line area of the absorbent body, there is a difference in rigidity between the portion where the slit portion is provided and the other portion, and the slit portion becomes the starting point of bending. In addition, by forming the slits on the non-opposing surface of the skin, it is possible to absorb the path difference that occurs when the absorbent article is folded. With these effects, when the absorbent article is folded into a single packaging form, it is easy to form a folded shape.

The present invention is applicable to various absorbent articles such as sanitary pads and incontinence pads in addition to the sanitary napkins of the above-mentioned respective embodiments. In addition, the absorbent article of the present invention is not limited by the above-mentioned embodiment, and can be appropriately modified within a range that does not deviate from the purpose and spirit of the present invention.

3‧‧‧Packing sheet

5‧‧‧Polyline area

7‧‧‧Surface sheet

8‧‧‧Inside sheet

9‧‧‧Absorber

10‧‧‧Coated sheet

12‧‧‧Fine seams

13‧‧‧Fixed part

14‧‧‧Concave

15‧‧‧High Density Department

Claims (10)

A personal package of an absorbent article, which has a length direction and a width direction, and a fold line area extending in the width direction. An absorbent article having an absorbent body is folded together with a packaging sheet. , Characterized in that: the absorbent body has one surface and the other surface, and in the fold line area, at least one slit is arranged so as to cut from the one surface to the middle of the thickness direction of the absorbent body. ; On the other side of the surface and the said slit portion in the thickness direction of the absorbent body is provided with a recessed portion arranged from the other side to the middle of the thickness direction of the absorbent body, the said slit portion has on the one side The opening extending in the width direction, and the absorbent body is provided at least at a position overlapping the slit portion and the recessed portion in the thickness direction of the absorbent body: the slit portion and the recessed portion are in the absorbent body The area that does not overlap in the thickness direction is a high-density area, that is, a high-density area; the aforementioned high-density area includes: a high-density area, a region other than the aforementioned high-density area, and more High-density part, lower-density middle-density part. The individual package of the absorbent article described in the first item of the scope of patent application, wherein the region containing the high-density portion is arranged arcuately from the outer peripheral surface of the recessed portion to the middle of the thickness direction of the absorbent body. For example, the individual package body of the absorbent article described in item 1 or item 2 of the scope of patent application, wherein the aforementioned one surface is the surface facing the skin. The individual package body of the absorbent article as described in the first or second item of the scope of patent application, wherein the slit portion has a depth of 70% or less of the thickness of the absorbent body. The individual package body of the absorbent article as described in the first or second item of the scope of patent application, wherein the depth of the slit portion is deeper than the depth of the concave portion. The individual package of an absorbent article as described in the first or second claim, wherein the high-density portion is arranged from the outer peripheral surface of the concave portion to the middle of the thickness direction of the absorber. For example, the individual packaging body of the absorbent article described in item 1 or item 2 of the scope of the patent application, wherein the individual packaging body is the absorbent article and the packaging sheet folded multiple times together in a plurality of the fold line regions, and The absorbent body is provided with at least one or more of the aforementioned slits in each area of the aforementioned folding line area. The individual packaging body of an absorbent article as described in the first or second patent application, wherein the absorbent body is provided with a plurality of the slits intermittently arranged in the width direction in the fold line region. For example, the individual package of the absorbent article described in item 1 or item 2 of the scope of patent application, wherein the absorbent article is on the garment contact surface of the absorbent article, that is, the non-fold line outside the fold line area The area is provided with a fixing part for fixing the absorbent article to the wearer's clothing. Such as the absorbent described in item 1 or item 2 of the scope of patent application The individual packaging body of the product, wherein the opening has a curved shape protruding toward the end in the longitudinal direction.

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