TWI496564B - Individual package of absorbent article - Google Patents

Description

Individual package of absorbent articles

The present invention relates to a single package of absorbent articles in which absorbent articles such as menstrual napkins are individually packaged.

As an ordinary structure, an absorbent article such as a sanitary napkin or an incontinence pad has a structure in which an absorbent body is interposed between a front sheet and a back sheet. In recent years, in order to improve the adhesion or leak-proof property of such absorbent articles to the body, it is developing to increase the volume of the absorbent body from the lower abdomen side to the buttocks in the central portion in the width direction of the article, and to make the portion to be used. Absorbent articles that are raised on the side of the skin.

For example, Japanese Patent Publication No. 2000-189456 discloses that the middle and high ridges are separated and formed at two locations corresponding to the user's excretory portion and the user's buttocks, and the ridges are formed. The inter-part portion serves as a menstrual sanitary napkin that bends the flexible region with a lower rigidity.

Further, Japanese Laid-Open Patent Publication No. 2006-239162 discloses an absorbent article having a middle portion of an absorbent body divided into two portions of a front ventral side and a rear dorso side. The absorbent article can be protruded toward the skin by the absorbent body to improve the conformability, suppress the leakage of the discharged liquid, and the like, and the middle and high portions are divided into two, so that the deformation of one of the middle and the high portions is hard to affect the middle and high portions of the other. .

However, the absorbent article before use is generally considered to be hygienic and portable, and is folded together with the sheet for packaging, for example, into a single package of individual packages. In the article including the absorbent body having the middle-high portion as described above, if the ridge portion is formed, for example, over the entire length direction, when the single-pack product is folded in the surface direction in the longitudinal direction, the deformation is concentrated at the crease position. The situation that leads to strong deformation. When the individual packaged product is stretched by opening at the time of use, there is a crease that may cause discomfort during wearing, or the part may not adhere to the skin and cause liquid leakage. In the case where the pleats are provided on both sides of the absorbent article, the pleats are also deformed by the folding, and as a result, the leakproofness is impaired.

Further, when the individual packaging of the absorbent article having the upper portion of the absorbent body as described above is performed, for example, in a state of being three-folded, the portions protruding in the center of the absorbent body collide with each other. overlapping. As a result, a single package which becomes a part of the overlap becomes thicker and the volume of the central expansion increases. Therefore, it is inconvenient to carry out when carrying out, or the docking state is broken and becomes a deformed absorbent article when carrying, which makes the absorption and wearing feeling worse, or the packaging is deformed during sales and it is difficult to carry out the single package. Concentrated secondary packaging.

The present invention has been made in view of the above aspects, and a first object thereof is to provide a single package of an absorbent article which is tightly folded and which suppresses creases remaining when it is opened for stretching, and is also difficult to form a pleat shape on the side portions. Damaged, the three-dimensional shape of the absorber and its peripheral members can be well maintained.

Further, a second object of the present invention is to provide a single package of an absorbent article which is improved in adhesion to the body and leak-proof by forming a projection forming a middle-high portion on the absorbent body, and suppressing A part of the package is folded to make the absorbent article too thick when it is folded.

The above first object is achieved by a single package of absorbent articles comprising a front sheet on the skin contact side, a back sheet on the non-skin contact side, and the clip. The absorber between the two sheets is folded together with the packaging material in the longitudinal direction of the user, and the absorbent body is bulged toward the skin contact surface side to form the front middle high absorption portion. And a rear middle-high absorption part, wherein a rigid region is provided in the absorber portion between the two high-absorption portions, and the rigid region is configured to include a region in which the front surface sheet and the absorbent body are compression-bonded to form a concave portion, and is drawn When the line penetrates the line of the rigid region in the width direction, a certain portion of the concave portion is present on the line, and the absorbent article is folded at a position where the rigid region is bent (hereinafter, the absorbent property is used) A single package of articles is referred to as a first embodiment of the invention).

Moreover, the above second object is achieved by a single package of absorbent articles comprising a top sheet, a back sheet and an absorbent body sandwiched between the sheets. When the sexual product is folded together with the packaging material, the upper absorbent portion and the rear middle high-absorbing portion are raised toward the skin side of the user, and the two high-absorbing portions are separated by the separation region. The front absorbent body and the rear back side, the absorbent article is folded toward the bulging direction of the two middle and high absorption portions at a bending position of the separation region, and at least the rear middle high absorption portion is in the folded state. A part is located in the above-mentioned separation area (hereinafter, a single package of the absorbent article is referred to as a second embodiment of the present invention).

In the single package of the absorbent article according to the first embodiment of the present invention, when the absorbent article packaged in the above-mentioned tightly folded state is opened, it is difficult to retain the crease, and it is difficult to break the crease shape and better. The three-dimensional shape of the peripheral member that maintains the bent position.

Further, in the single package of the absorbent article according to the second embodiment of the present invention, since the absorbent article contains a high portion of the absorbent body, the adhesiveness is high, the excretion liquid is efficiently absorbed, and the like, once absorbed, etc. It is difficult to leak out and can achieve a comfortable wearing feeling. Further, it is possible to suppress the folding and to partially thicken the individual packaging, and it is excellent in storage property and portability.

The individual package of the absorbent article of the present invention will be described in detail with reference to the drawings, based on a single package of menstrual napkin as a preferred embodiment and a menstrual napkin which is opened. The present invention is preferably related to the first embodiment or the second embodiment described above, and the invention relating to the embodiments has the same or corresponding technical features, and constitutes a group of inventions as the above-described invention. Hereinafter, the first embodiment and the second embodiment will be described in detail, but the present invention is not limited by the embodiments. First, a preferred embodiment of the first embodiment of the present invention will be described.

Fig. 1 is a perspective view schematically showing a state before packaging of a single package (Embodiment 1-1) of an absorbent article which is a preferred embodiment of the first embodiment of the present invention as seen from the front sheet side. In the figure, the state in which the menstrual napkin is gently bent in the longitudinal direction is indicated, and is shown in a state of being slightly pulled apart when worn. 2 is an enlarged cross-sectional view taken along line II-II of FIG. 1. The menstrual sanitary napkin 10 is integrally formed of a fibrous sheet (backing paper) surrounded by a pulp fiber stack and a rectangular shaped absorbent body 1 having a curved angle at a right angle is sandwiched between the back sheet 3 and the front sheet 2 ( In Fig. 1, the absorbent body 1 is covered by the front sheet 2 and is not visible, but for the sake of easy understanding, it is conceivable to remove the front sheet, and the absorbent body 1 and the absorbent portions 1a, 1b, 1c are indicated by symbols. ). Further, on both sides in the width direction (Y direction), a rising pleat 4k that bulges toward the front sheet side and includes the side surface sheet 4 that extends inside the longitudinal direction (X direction) is formed. Here, the front sheet side is a surface that comes into contact with the skin of the user, and the back sheet side is a surface that comes into contact with the undergarment. Further, the adhesive sheet is provided so that the back sheet 3 can be fixed to the undergarment when worn. In the following description, the ventral side of the menstrual napkin 10 mainly receiving the excretory fluid is referred to as the front or the front, and the opposite hip side is referred to as the rear or the rear.

The absorbent body 1 provided on the back sheet 3 extends from the front portion of the menstrual sanitary napkin 10 to the rear portion. In the absorber 1, the lower layer absorber 1c is disposed, and the front middle high absorption portion 1a and the rear middle high absorption portion 1b which are surrounded by the fiber sheet to surround the pulp fiber stack upper layer absorber 1 are also included. Further, the lower layer absorber 1c, the front middle-high absorption portion 1a, and the rear middle-high absorption portion 1b extending along the longitudinal direction are covered by the front sheet 2. Further, the front middle-high absorption portion 1a and the rear middle-high absorption portion 1b are separated from each other at a substantially central portion of the absorbent body 1 by a separation region (lengthwise width) P, and the front middle-high absorption portion 1a corresponds to the position of the excretion portion, and the rear middle-high absorption portion 1b corresponds to the hip position. With this configuration, the absorbent article as a whole has two medium-high absorber portions covered by the front sheet 2.

The both sides of the back sheet 3 at the side position corresponding to the position of the front middle-high absorption portion 1a in the front portion of the menstrual sanitary napkin 10 of the first embodiment 1-1 are formed with side flaps extending to the lateral outer side. Department 8. The back side of the side flap portion 8 is provided with an adhesive, and when worn, the side flap portion 8 is folded over the outer surface side of the undergarment so as to sandwich the crotch portion of the undergarment. Further, the back sheet and the side sheet are formed such that the side portions (side protruding portions) 10a and the longitudinal direction front and rear portions 10b protrude slightly outward from the absorbent body 1 to form flaps. The portion of the front sheet 2 and the side sheet 4 are joined to each other. With the protruding flaps and side flaps, the installation of the underpants is facilitated, and further, leakage of liquid or the like, particularly side leakage, is effectively prevented.

In the first embodiment 1-1, the following rigid region 9 is formed between the front middle high absorption portion 1a and the rear middle high absorption portion 1b. As shown in FIG. 2, the rigid region 9 has a portion in which the upper layer absorber is not convex, and the lower layer absorber 1c is present in the front side of the high-absorption portion (1a, 1b). The rigidity of the rigid region 9 is higher than that of the absorbent body 1 (the portion 13 near the rigid region). According to this embodiment, in the first embodiment, when the front portion of the absorbent article 10 is folded at the bending position k _{1 of} the rigid region, the bending position is difficult to be a linear crease or a plurality of pleats. In the state, it has a shape that is curved with a specific width. Therefore, wrinkles or deep creases which give an uncomfortable feeling when the folded absorbent article 10 is opened can be left without remaining.

Further, in the present invention, the measurement method of the bending rigidity is not particularly limited, but is not described below unless otherwise specified. A Handle-O-Meter tester manufactured by Daiei Scientific Seiki Co., Ltd., which is suitable for the softness measurement method specified in JIS L1096 (general fabric test method), was used in a test chamber having a temperature of 23 ° C and a humidity of 50%. The test piece is horizontally disposed on the sample stage adjusted to 30 mm between the slits so that the measurement portion of the test piece is located at the center between the slits and the length of the test piece along the length direction of the absorbent body is orthogonal to The direction of the slits is the same. The test piece is not fixed to the sample stage. The blade adjusted to the position where the surface of the sample stage was lowered to a position below the 8 mm (lowest position) was lowered from the upper side of the test piece at a fixed speed of 200 mm/min. Further, the highest value (cN) indicated by the indicator (load gauge) when the test piece was pressed back and forth in the longitudinal direction was read. The measurement was performed 5 times, and the average value was calculated and set as a rigidity value.

In the menstrual napkin of the first embodiment, the front side middle absorbent portion 1a and the rear middle high absorbent portion 1b are formed on the front sheet 2 along both sides in the width direction of the rigid region 9. A somewhat concave or continuous groove 11. Thereby, the front sheet 2 is firmly fixed to the absorbent body 1, and the deviation of the front sheet of the front and rear middle high absorption portions can be prevented. In the 1-1st embodiment, the dot-shaped embossed groove 11 is formed so as to extend around the front middle-high absorption portion in the vicinity of the front end S of the front middle-high absorption portion 1a, and It is bent in an arc shape to the vicinity of the rear end of the absorber 1 behind the longitudinal direction of the absorbent article 10. Further, in the vicinity of the rear end T of the rear middle high-absorption portion 1b, a groove 12 having a gradation of a continuous embossing is formed so as to surround the rear middle-high absorption portion 1b. The grooves 11, 12 can be formed by heat embossing of the absorbent body 1 from the front sheet 2. Further, the continuous embossing (not shown) constituting the rigid region may be a case where a plurality of linear or dot-shaped grooves extending in the width direction are intermittently present in the longitudinal direction.

As shown in Fig. 1, the menstrual sanitary napkin 10 of the embodiment 1-1 is folded in such a manner that, in the front side thereof, the groove position 11 near the front end S of the front middle high absorption portion 1a is used as the bending position. k ₃ is such that the front side thereof overlaps with the front side of the absorbent article 10. Furthermore, in the rigid zone 9, an intermediate position thereof about the longitudinal direction of the folding position k ₁ menstrual sanitary napkin 10 is folded. Further, the position of the groove near the T 12 after the rear side of the article, to surround the rear end 1b in the high absorbency portion is bent and folded position k ₂ of its rear side. As described above, the menstrual sanitary napkin 10 of the first embodiment 1-1 is folded at the position of the three crease lines to form a single package, and more details about the folding order and the like will be described later.

Fig. 3 is a cross-sectional view showing a section taken along line III-III of Fig. 1 in a schematic manner. In the menstrual napkin 10 of the first embodiment, the upright pleat portion 4k including the side sheets 4 and bulging and having the side sheets 4 is provided on the surface thereof. As shown in FIG. 3, the side sheet 4 has a double structure in which the outer side sheet 14 and the inner side sheet 15 are adhered to each other. The side sheet 4 has a slack portion in a state in which the menstrual napkin main body (the front sheet, the back sheet, and the absorber) is stretched, and is disposed on the side portion thereof. On the other hand, the inner elastic member is disposed in an extended state. . As shown in Fig. 1, the menstrual sanitary napkin thus constituted is in a state of being bent toward the front sheet side at the time of wearing, whereby the pleats 4k are raised to bulge toward the surface of the absorbent body 1, and It is formed in an arc shape when viewed in the cross section in the width direction. In the raised pleats 4k of the ridge, a plurality of thin elastic bands 16 extending between the outer sheet 14 and the inner sheet 15 in the longitudinal direction are sandwiched, and the contraction force ensures the crease 4k In a standing state, a cylindrical shape indicating good cushioning properties is maintained in a duct shape along the longitudinal direction of the article.

The base end portion 17 along one side in the longitudinal direction of the side sheet 4 is fixed to the front sheet 2 on the side upper side of the absorbent body 1, and the other base end portion 18 is fixed away from the side edge of the absorbent body 1. The flap portion 3a protrudes from the side of the back sheet 3. With this configuration, the inside of the side sheets 4 to form the communication of the first hollow portion extending to an upper surface of the absorbent body 1 with a Q _1, and Q and the first hollow portion ₁ and the side of an extending direction of the absorbent body The second cavity part Q ₂ . It is preferable that the unique cylindrical pleated structure can improve the wearing feeling at the time of wearing and exhibit a high leakage preventing function on the side.

Next, referring to Fig. 4 and Figs. 5(a) to 5(c) in which the menstrual sanitary napkin of the embodiment 1-1 is further patterned, reference is made to Fig. 6 and Fig. 7(a) showing the embodiment for comparison. And (b), the folding aspect of the rigid region portion in the present invention will be described.

First, as shown in FIG. 4 and FIG. 5(a), in the first embodiment, the front middle high-absorbent portion 1a and the rear middle-high-absorbent portion 1b are formed integrally along the longitudinal direction (X direction). The recessed portion 19 of the crescent shape of the width w is formed into a rigid region 9 having a lower flexibility than the other portions of the absorbent body 1. In the present invention, the "rigid region" refers not only to the embossed portion in which the bending rigidity is improved, but also to the range in which the crease adhesion suppressing effect can be obtained with respect to the surface folding as a function of the planar shape. At this time, when the line k ₁ in which the width direction penetrates the rigid region 9 is drawn, a certain portion of the concave portion 19 is necessarily present on the line k ₁ . Specifically, it refers to an area in which the projected image is projected when the portion that is highly rigid is observed from the width direction (Y direction) and the longitudinal direction (X direction) of the article. As described in the first embodiment, the region (rectangular region) which is separated from the crescent portion of the crescent-shaped portion by one of the dot lines in the center of the article is the rigid region 9 (see FIG. 4).

The method of forming the concave portion (embossed portion) 19 constituting the rigid region 9 is not particularly limited, and can be formed, for example, by a hot embossing method as follows. That is, the following heat embossing apparatus is used, that is, an embossing roll including a ridge portion having a shape corresponding to the indented portion on the circumferential surface, and a nip roller disposed opposite to the circumferential surface of the embossing roll. The absorbent body and the front sheet are inserted between the two rolls in such a manner that the side of the front sheet is on the side of the embossing roll. Then, by integrally heating and pressurizing these, an indentation portion having a concave shape in a concave shape is formed. Further, in addition to the hot embossing method, it may be formed by an ultrasonic embossing method or the like. The embossed portion may be formed into various shapes in addition to these, but this portion will be further described below.

When the absorbent article 10 is partially folded in such a rigid region 9 having a certain lengthwise width w, the portion of the rigid region 9 is not bent into a line shape, but is a rigid region 9 as shown in Fig. 5(b). It is bent into a bent portion in a planar shape or a gently curved shape, and it is difficult to form an acute angle crease. Thereby, it is possible to make it difficult to concentrate the strain ε inside the absorber at the time of bending at the bending position. Therefore, it is preferable that the irregular or deep crease does not adhere to the absorbent body 1 when it is opened at the time of use. Further, the cylindrical shape of the side upright pleats 4k is also not damaged as shown in Fig. 5(c), and the void state is ensured.

On the other hand, when a rigid region is not formed between the front middle high-absorbent portion 1a and the rear middle-high-absorbent portion 1b as a form to be compared, as shown in FIG. 7(a), the bent position is easy to bend. It is bent in a linear shape to an acute angle or is easily formed into a crease-like crease at its periphery. Therefore, the strain ε is concentrated from the both sides to the curved portion, and a deep crease which is wrinkled or concave is likely to remain in the central portion 21 (see FIG. 6) of the bending position of the absorbent body at the time of opening. Further, the tubular pleats 4k on the side may be deformed 22 at the bent position, and the hollow portion may be partially broken as shown in Fig. 7(b), and it is difficult to secure the original shape.

Next, a pre-packaging state of a single package (Embodiment 1-2) of an absorbent article as another preferred embodiment of the first embodiment of the present invention will be described with reference to Figs. 8 to 10 . The menstrual sanitary napkin 20 of the present embodiment 1-2 will be described with respect to the menstrual sanitary napkin 10 of the above-described embodiment 1-1, and the description of the same points will be omitted. For the point that is not specifically stated, the description of the above-mentioned menstrual sanitary napkin 10 is appropriately applied.

The menstrual sanitary napkin 20 includes, along the longitudinal direction thereof, a discharge portion opposing portion A that is disposed at a portion of the liquid discharge portion that is disposed opposite to the wearer when worn, and is disposed on the wearer's portion when the wearing portion is worn. The back side (rear) rear side portion B, and the front end portion C and the rear end portion D of the front end portion and the rear end portion of the sanitary napkin 20, respectively. In the present embodiment, the boundary between the opposing portion A and the rear portion B of the excretory portion is present at a substantially central portion in the longitudinal direction of the sanitary napkin 20. The rear side portion B of the sanitary napkin 20 is separated from the wing base end portion 81 (see Fig. 8) of the rear end side of the sanitary napkin by 2 cm or more, preferably at a position separated by 3 cm or more.

The rising pleats (leakage preventing walls) 4k in the embodiment 1-2 extend along both sides in the width direction of the tampon 20, and the venting portion facing portion A includes the inner side as shown in Fig. 9(a). The elastically stretchable portion 42 of the protruding portion 42a and the outer protruding portion 42b is formed in a T-shaped cross section at the upper end R of the base wall portion 41. In other words, the leakage preventing wall 4k has a shape in which the elastically stretchable portion 42 is placed in a direction orthogonal to the free end edge 44 of the base wall portion 41 rising from the side of the self-absorbing body. The protruding width of the inner protruding portion 42a and the outer protruding portion 42b may be the same or different, but in the example shown in Fig. 9(a), the width is different, and the ratio of the protruding width of the inner protruding portion 42a to the protruding width of the outer protruding portion 42b (The former: the latter) is about 3:2~5:1. A linear elastic member 16 is disposed at intervals between the two protruding portions 42a and 42b. The pair of standing pleats 4k and 4k are formed along both side edges in the longitudinal direction of the absorbent sheet E including the front sheet 2 and the absorbent body 1. In the rising pleats 4k of the embodiment 1-2, as shown in Figs. 9(a) to 9(c), the elastically stretchable members 43 are fixed to the other constituent members of the sanitary napkin 20 (the front sheet 2 or the back sheet 3). Formed by, etc.). 9(a) to (c) show the hatching in FIG. 8 which is a plan view of the stretched state for the sake of easy understanding, but actually, as a wearing state or close as shown in FIG. It is represented by a section when the state of the natural shape is bent.

The side sheet (base portion forming sheet portion) 4 of the elastically stretchable member 43 spans the front end portion C and the rear end portion D of the sanitary napkin 20, and is opposite to the end edge 44 of the elastic stretchable portion 42 side. In the vicinity of 45, as shown in Figs. 9(a) to 9(c), the side portion 2a and the back sheet 3 of the front sheet 2 are fixed to the lower surface side of the absorbent body 1 by a common joining mechanism 60 such as an adhesive. Further, at least the inner side (inner protruding portion 42a) in the width direction of the elastically stretchable portion 42 is fixed to the front sheet 2 in the front end portion C and the rear end portion D.

As shown in FIG. 9(b), the rising pleats 4k in the embodiment 1-2 are provided with a plurality of portions 48 in a portion of the base wall portion 41 of the elastically stretchable member 43 disposed at the rear portion B, thereby making the rear portion The distance L2 from the upper end portion R of the base wall portion 41 to the back surface sheet 3 (leak prevention layer F) in the portion B (see FIG. 9(b)) is larger than the distance L1 in the opposing portion A of the excretory portion. Figure 9(a)] is short. In other words, in the first embodiment, from the viewpoint of production, the side wall sheet 4 is formed by using the elastically stretchable member 43 having the width of the side sheet 4 in the longitudinal direction to form a leakage preventing wall, and the side sheet in the rear portion B. 4 The multi-layered portion 58 is provided, whereby the distance L2 from the upper end portion R of the base portion of the rear portion B to the leakage preventing layer F is made shorter than the distance L1 in the opposing portion A of the excretory portion. Further, the multilayer portion 48 is formed by bending one of the widthwise directions of the side sheets 4 such that the faces of the same side of the sheet portion face each other, and the opposing faces are mutually adhered by an adhesive Bonding is performed by a common joining mechanism 60 such as heat sealing.

The multilayer portion 48 is formed to span a specific length of the elastically stretchable member 43 in the longitudinal direction. In the longitudinal direction of the sanitary napkin 20, the length L3 of the portion in which the multi-layered portion 48 is formed is preferably 15 to 45% of the total length L4 (refer to FIG. 8) of the portion where the pleats 4k stand up, and particularly preferably 20~ 30%.

The rising height of the rising pleats 4k in the sanitary napkin 20 of the embodiment 1-2 is gradually lowered from the excretory portion opposing portion A toward the rear portion B (see FIGS. 9(a) and 9(b)), and further in length. The front end portion C and the rear end portion D in the outer direction are in a state of no standing height. This is carried out by fixing the elastically stretchable portion 42 to the absorbent body as shown in Fig. 9(c), and forming the base wall portion 41 in a state of being folded without gaps, and fixing it to the front sheet. 2 on.

The sanitary napkin 20 of the embodiment 1-2 can be efficiently manufactured, for example, by a method for producing an absorbent article, and the method for producing the absorbent article includes the steps of: manufacturing the absorbing layer E or the absorbing layer E and the leakage preventing layer a body of F; an elastically stretchable member 43 including a side sheet 4 having a certain width across a length direction and an elastic stretch portion 42 provided to be connected to one end portion 44 of the side sheet 4 in the width direction; the elastic stretch member 43 The other end portion 45 of the side panel 4 or the vicinity thereof is fixed to both side portions of the main body; the elastic sheet member 4 of the elastic sheet member 4 is disposed at a portion of the rear portion B at the elastically stretchable member A plurality of layers 48 spanning a specific length are formed in the longitudinal direction of the 43; and both ends of the elastically stretchable member 43 in the longitudinal direction are fixed to the body. For the processing of other specificities, a general manufacturing method of such an article is sufficient, and other modifications can be referred to Japanese Patent Laid-Open No. 2003-245306.

As shown in Fig. 9(a), the elastic T-shaped portion 42 of the upper end of the embodiment 1-2 is formed in a flat shape opposite to the skin surface, so that the skin contact can be simultaneously satisfied. Good feeling and liquid leakage resistance. Further, since the concave portion 19 constituting the rigid region 9 is disposed in the center of the sanitary napkin in which the deep crease is easily adhered when the single package is formed, wrinkles can be prevented from occurring in the center in the width direction of the periphery, and the composition can be prevented. The member in which the pleats 4k is raised is broken and the crease is excessively left. As a result, even if a crease is attached to a single package, it is preferable to restore the sufficient erectability of the pleats 4k and the good T-shape of the cross-section when the pleats are removed and used.

By forming the above embodiment, wrinkles in the center of the product can be prevented and wrinkles can be prevented from being broken, whereby the curved shape before and after the product formed by the pleats becomes a more stable shape. At the same time, when the sanitary napkin is fixed to the shorts, the operability of the wings can be particularly improved.

The rigid region in the first embodiment of the present invention will be further described.

An example of an embossed pattern forming a rigid region is shown in Fig. 11, and the relationship between the size of the embossed shape and the lengthwise width w of the rigid region will be described. In this example, the concave portion 19 includes discontinuous rectangular indentations 19a to 19e, and is formed in a plane which is intermittently arranged along the width direction of the absorbent body and which is convexly curved toward the rear side of the absorbent body. The time is a crescent. More specifically, when the line extending along the width direction (Y direction) of the article is assumed to be the auxiliary lines q ₁ , q ₂ , q ₃ and moved for observation, the position of the auxiliary line q ₁ is pressed. The marks 19a and 19e exist on the line, and move toward the auxiliary line q ₂ side, and the indentations 19a, 19b, 19d, and 19e exist on the line. Further, at the position of the auxiliary line q ₂ , the indentations 19a to 19e are all present on the line. As it moves toward the auxiliary line q ₃ side, and the indentations 19b to 19d exist on the line, the indentation 19c exists on the line at the position of the auxiliary line q ₃ . At this time, the recessed portion 19 may be entirely recessed or may be recessed only by the indentation. Alternatively, as in the second embodiment (Fig. 19), irregularities may be formed in the recessed portion where the recess is shallow and the deeper portion.

Here, the dimension of the longitudinal direction width w of the rigid region 9 is preferably the thickness of the absorbent body around which the embossed body is not formed, that is, the lower layer absorber in the first embodiment 1-1 and 1-2. The thickness d (see FIG. 2) of 1c is twice or more (in FIG. 2, the lower layer absorber 1c is patterned thickly in consideration of the visibility of the structure of the member structure). Further, the width w is more preferably 2.5 to 9 times the thickness d, and particularly preferably 3 to 6 times. Further, it is preferable that the lateral width 1 of the rigid region is equal to or larger than the lateral width of the intermediate high or the rear absorbent portions 1a and 1b (r of FIG. 4). Further, the method of making the width b of the longitudinal direction of each indentation larger than the lateral width a (b>a) is preferable because it can ensure effective rigidity. Each of the indentations 19a to 19e is discontinuous when viewed from a projection image when projected in the longitudinal direction (X direction) of the menstrual napkin 10, but as a projection image when projected in the lateral width direction (Y direction), Adjacent persons are formed in a manner of being coincident with each other and in a continuous manner. Thereby, the whole becomes a crescent moon in a plane view. The rigid region 9 is formed in a region including such a crescent-shaped embossed pattern, whereby when the position of the rigid region 9 is bent, the crease is not made linear, and the pressure of the absorber is not concentrated to the bend. It is preferable that the folded portion portion, in particular, does not have a wrinkle-like or concave crease when it is opened.

Fig. 12 is a view showing the shapes of various embossing patterns formed in a rigid region. Further, in the figure, a portion surrounded by a solid line generally indicates a concave portion or an indentation, and a horizontal line or a diagonal line indicates an area thereof. Further, the evaluation results of the examples are shown in the drawings, but this aspect will be described below. The patterns A and B shown in the drawing are examples of recesses formed by continuous embossing. For such a continuum, the recess has the same meaning as the indentation. The pattern C to G is an example of a concave portion formed by discontinuous linear embossing (indentation). That is, a plurality of indentations are gathered to form a unified recess. The longitudinal direction length of each embossed portion is longer than the length in the lateral direction, and when viewed in the lateral direction, the adjacent sides of the linear embossed overlap each other. In the patterns A to G, the bent form is a form in which the surface is bent. On the other hand, the width of each of the indentations of the embossed patterns of the patterns H and I, that is, the length in the longitudinal direction is small, and the bent form is likely to be bent. In this respect, the patterns A to G are preferably such that it is difficult to leave the crease of the absorber at the time of opening, and the shape of the side member is further stabilized. Although not shown in the figure, the embossed portion formed by combining the embossed patterns may be used to form a rigid region. For example, it is also preferable to combine the pattern B and the pattern in which the pattern B is reversed, and to form an embossed portion having an arc-shaped protruding portion abutting each other and having an "x" shape in plan view.

The individual package of the absorbent article of the embodiment 1-1 is folded and packaged at three locations of the bending positions k ₁ , k ₂ , and k ₃ of the absorbent article as described above. Fig. 13 is a view showing an example of the order of folding and the state in the middle of folding, and Fig. 14 is a perspective view of a single package in a state of folded packaging. In addition, in FIG. 13, the packaging sheet 34 is shown by the two-dot chain line, and is shown in FIG. A packaging sheet 34 including the entire length of the back sheet 3 is attached to the outer surface of the back sheet 3 of the menstrual sanitary napkin 10, and the packaging sheet 34 can be easily removed in use, and after the packaging sheet 34 is removed, the sheet is removed. The adhesive of the material remains on the outer surface of the back sheet 3. Therefore, the back sheet 3 is attached to the undergarment at the time of use.

As shown in Fig. 13 (a), the portion on the rear side of the absorbent article 10 including the packaging sheet 34 on the back side is folded toward the front sheet _{2 at} the position of the crease line k ₂ shown in Fig. 1, and secondly, after flanking portion 8 is folded toward the front side of the sheet 2, part ₂ to be folded crease lines k of _{k. 1} is folded in the same direction at the center of the crease lines 9 of the rigid regions to a state of FIG. 13 (b) of the. In this case, when there is an adhesive surface on the back surface of the side flap portion 8, it may be covered with another packaging sheet. Further, the folded portion 1 is folded so that the position of the crease line k ₃ of Fig. 1 is superimposed on the front sheet 2 of the front side portion. Then, as shown in FIG. 14, the folded packaging sheet 34 is sealed by the sealing portion 35, and the sealing member 33 is attached to the outside to be fixed, whereby the individual packaging body 100 of the sanitary napkin 10 can be formed.

In the above, the single package form has been described by taking the embodiment 1-1 as an example. However, when k ₁ , k ₂ , and k _{3 are} folded to form a single package form, the menstrual period of the embodiment 1-2 is used. The same is true in cotton.

Furthermore, in this embodiment, a single package that is folded into four folds is formed, but it is not limited to the above-mentioned folded four folds, and for example, it may be folded three times in an absorbent article of a type that is longer along the length direction and longer. And for packaging.

Moreover, the bending position k ₂ of the shape shown in Fig. 13 (a) is set to a position adjacent to the rear middle-high absorption portion 1b without folding the rear middle-high absorption portion 1b, thereby accommodating the rear high-absorbing portion 1b along the rear side. The bending is performed in such a manner that, in the bending position k ₂ , wrinkles or deep creases which give an uncomfortable feeling when the folded absorbent article 10 is opened are not left. Further, the groove 12 in which the dot-like embossing is continuous is formed, and the height of the rear middle-high absorption portion 1b is lowered obliquely from the front portion to the rear portion, whereby wrinkles or creases are less likely to be formed.

In addition to the above-described effects of slowly bending the strong crease preventing action between the front and rear high-absorbing portions by the formation of the rigid region, the cylindrical pleats 4k of the side have the following effects. That is, it is difficult to form the wrinkles by the cylindrical structure including the standing positions of the two portions of the inner side and the outer side, whereby it is difficult to form wrinkles or creases. Further, although the effect is weaker than the pleats which are formed by the tubular structure, the pleats are formed by folding the elastic portion, or the cross-sectional shape of the so-called T-shape including the region representing the elasticity protruding inward/outward. The pleats (shown in Embodiment 1-2) or the pleats of the Y-shaped cross-sectional shape also exhibit the same effect of being difficult to pour.

Next, a preferred embodiment of the second embodiment of the present invention will be described.

Fig. 15 is a partially broken perspective view showing a single package of the menstrual sanitary napkin (Embodiment 2-1) which is a preferred embodiment of the second embodiment of the present invention. Fig. 16 is a partially broken perspective view showing the absorbent article (menstrual sanitary napkin) when the package of the individual package shown in Fig. 15 is taken apart and stretched (however, the sheet for packaging and the label are not shown).

In the menstrual sanitary napkin of the embodiment 2-1, the absorbent body 1 is provided between the liquid-impermeable back sheet 3 and the liquid-permeable front sheet 2. When the front sheet 2 is brought into contact with the skin of the user and the excretion liquid such as menstrual blood is taken, the absorbent body 1 absorbs and holds the excretion liquid or the like that has passed through the front sheet 2 . Further, in the second embodiment, the circumferential embossing 26 and the side embossing 27 are formed such that the front sheet 2 and the absorber 1 are integrated. Thereby, the front sheet 2 and the absorber 1 are fixed so as not to be offset, and the liquid which has transitioned to the side and the front-rear direction is blocked, and liquid leakage is prevented. The method of forming the circumferential embossing and the side embossing is not particularly limited, and it can usually be formed by a method used in such an article.

Further, in the menstrual sanitary napkin 30 of the second embodiment, the back sheet 3 and the front sheet 2 are joined by the peripheral seal portion 25 to be sealed. In the embodiment 2-1, as a method of forming the peripheral seal portion, for example, heat sealing is exemplified. Further, the menstrual sanitary napkin 30 of the second embodiment is a side flap portion 8 extending outward from the outer side of the longitudinal direction of the longitudinal direction of the article and on both sides of the article width direction. The flap portion 8 is folded into the opposite side of the skin side of the user when in use, and is placed on the back of the crotch portion of the undergarment to prevent movement, and the stain on the undergarment caused by the side leakage can be prevented. Although not shown, the pleated pleats disposed on the side of the front sheet which are erected in contact with the skin surface during wear and the side sheet for forming the erected pleats are provided, and the side is further effectively prevented. Leakage, this aspect is ideal. Further, in the absorbent article 30, an adhesive (not shown) for preventing migration is provided on the inner side of the back surface of the back sheet 3, and is fixedly attached to the position in the abutting state as described above.

In the absorbent body 1 of the embodiment 2-1, the absorbent body 1 is disposed so as to remain on the entire surface of the article in a plan view so that the peripheral edge portion of the absorbent article remains. The absorbent body 1 includes an inner lower absorbent body 1c extending over the circumferential embossing 26, and an upper absorbent body (1a, 1b) provided on the lower absorbent body. Here, the lower layer absorbent body 1c is long and is widely disposed in the entire article, and extends from the vicinity of the article leading end portion 10c to the vicinity of the rear end portion 10d. On the other hand, the upper layer absorber is included in the front side of the front side of the user, and the high-absorption part (the front absorption convex part) 1a and the back side of the skin side are protruded. The rear absorbs the convex portion 1b. In the second embodiment, the upper layer absorber is joined to the lower layer absorber. The bonding method is not particularly limited, but it is preferably joined by a hot melt adhesive or a dot-like unevenness (embossing) treatment.

In the ninth embodiment, the front middle high-absorbent portion 1a has a discharge point G facing the vaginal opening of the user, and the portion is firmly adhered to the skin of the user. Therefore, when there is excretion liquid (menstrual blood or the like), the excretion liquid is directly transferred to the front middle high absorption portion 1a via the front sheet 2 and absorbed. Further, since the front middle-high absorption portion 1a is raised, the amount of liquid that can be absorbed in the portion is large with respect to the absorber in which the above-mentioned raised portion is not present. Thereby, it is possible to prevent the unintentional spread of menstrual blood or the like and absorb and retain it. Further, since the high-absorption section 1a and the lower-layer absorber 1c which have absorbed the menstrual blood and the like are integrated, the menstrual blood is rapidly transitioned to the lower layer, and for example, even if there is a user's action such as compression, the menstrual blood once absorbed may not be absorbed. Waiting for the flow.

On the other hand, in the second embodiment, the high-absorption portion 1b is in contact with the buttocks at the time of wearing, and particularly in contact with a deep portion near the anus of the groin. In addition, the rear middle-high-absorption portion 1b is a "barrier wall" that absorbs the liquid that can be absorbed by the front-lower-high absorption portion 1a or that is slightly reversed and turns to the rear side (the buttocks side) to prevent back leakage. In other words, even if there is a liquid flowing out from the front, the front side (barrier surface) H (see FIGS. 17-1 and 18) of the rear middle-high absorption portion 1b can capture the liquid or the like without causing the liquid flow. The rear middle high absorption portion 1b or the lower layer absorbent body 1c can be quickly introduced to the outside of the article. From this point of view, the barrier surface H of the rear middle-high absorption portion 1b is preferably a rising surface with respect to the upper surface of the lower-layer absorbent body 1c, and it is preferable that the inclined surface may be inclined or curved. Preferably, it is a flat surface or a curved surface opposite to the front side of the article. For example, there is a situation in which the adhesion between the skin surface of the user in the excretion point G and the surface of the article is damaged or generated due to the movement of the body or the like in the posture of the user lying on his or her side when sleeping. Deviation, or a large amount of menstrual blood, etc., cannot be completely absorbed by the front side of the absorber. At this time, the high-absorption section 1b is also used to absorb the menstrual blood to prevent leakage.

When the packaging state of the individual package of the embodiment 2-1 is described with reference to Figs. 15 and 16, the packaging sheet 34 will be on the outer side of the back sheet 3 of the menstrual napkin 30 and the menstrual napkin 30. Overlap and fold. First, in the period of the sanitary napkin 30 within the separation region r, the rear section 1b in the vicinity of high absorbency or superabsorbent in the rear of the contact base portion _{1b. 1} k, is bent together with wrapping sheet 34 is folded. Further, the bending line indicated by the base line k _{2 in} the vicinity of the front middle high-absorbing portion 1a or in the vicinity of the front portion 10c before being brought into contact with the packaging sheet 34 is folded and folded. Moreover, the edges of the packaging sheet 34 are sealed by the sealing portion 35 to form a single package 100' contained in the three-fold folded menstrual sanitary napkin 30. In the bent packaging sheet 34, a label 33 is attached to the end of the side protruding toward the surface of the individual package 100' to be sealed. When it is opened, the label 33 is pulled in the direction T, whereby the packaging sheet 34 of the sealing line 35 is subsequently released, and the first and second release papers of the packaging sheet 34 are joined without being peeled off (not The illustration) is peeled off together with the packaging sheet 34, and the internal menstrual napkin 30 is taken out in a state where the release paper is peeled off.

Fig. 17-1 is a cross-sectional view showing a section taken along the line IV-IV in Fig. 16. As shown in the figure, in the menstrual sanitary napkin of the embodiment 2-1, the front middle-high absorption portion 1a and the rear middle-high absorption portion 1b are disposed on the layer absorber 1c on the entire surface of the substantially uniform thickness. The convex portion is provided in a separated state across the separation region r. Fig. 17-2 is a cross-sectional view showing a state in which the menstrual sanitary napkin of the embodiment 2-1 is individually packaged by the cross section shown in Fig. 17-1. However, the back sheet 3 and the front sheet 2 are omitted and displayed in accordance with the shape of the absorber.

In the second embodiment, the length w _{r of the} separation region r in the longitudinal direction is not particularly limited, but is preferably determined in consideration of the relationship with the longitudinal length w _b of the rear middle-high absorption portion 1b (see the drawing). 17-1). For example, it is preferable that the length w _{r in} the longitudinal direction of the separation region is 60% or more of the length w _{b in} the longitudinal direction of the rear middle-high absorption portion 1b, and more preferably the length in the longitudinal direction of the rear middle-high absorption portion 1b. _b or more (w _r ≧w _b ). Specifically, in the case of the menstrual sanitary napkin of the type of the embodiment 2-1, the length w _{r of the} separation region in the longitudinal direction is preferably 15 to 50 mm, more preferably 20 to 40 mm. By setting in this way, when the menstrual sanitary napkin 30 is first folded in the first bending direction u ₁ (refer to FIG. 17-2) at the baseline k ₁ , at least a part of the rear middle high absorption portion 1 b is located in the separation region r, and is high in the front direction. The area where the absorbing portions overlap is small. Further, by folding the _second intermediate bending direction u ₂ at the baseline k ₂ and spatially accommodating the rear middle-high absorption portion 1b, it is possible to suppress a part of the individual package 100' which is thick and tight (see FIG. 15).

In the menstrual napkin of the second embodiment, the length w _{a in} the longitudinal direction of the front middle-high absorption portion 1a is not particularly limited, but is preferably a relationship with the length w _{b in} the longitudinal direction of the rear middle-high absorption portion 1b. Let w _{a be} greater than w _b (w _b <w _a ). The length w _a in the longitudinal direction of the front middle high-absorbent portion 1a is preferably 60 to 120 mm, more preferably 60 mm to 120 mm, in consideration of the function of the liquid or the like in the discharge point G of the convex portion. It is set to 70~110mm. The length w _b in the longitudinal direction of the rear middle-high absorption portion 1b is preferably 20 to 75 mm, more preferably 25 to 50 mm, in consideration of the function of the barrier wall described above. By setting in this way, the front middle high-absorbent portion 1a and the rear middle-high-absorbent portion 1b are easy to absorb excreted menstrual blood and the like, and it is possible to achieve conformability and tight individual packaging in accordance with the fluctuation of the user's body. Further, in the preferred form in which the length in the longitudinal direction of the separation region is 60% or more of the rear middle-high absorption portion 1b, and the length in the longitudinal direction of the front middle-high absorption portion 1a is longer than the length in the longitudinal direction of the rear middle-high absorption portion 1b, It is a single package form in which the front portion of the baseline k _{2 of the} menstrual napkin overlaps the front middle high absorption portion 1a but does not overlap the rear middle high absorption portion 1b accurately, so that a single and more stable single package shape can be formed. Package.

In the menstrual napkin of the embodiment 2-1, the front middle-high absorption portion 1a is raised toward the front sheet side with a maximum value and a height h _a (see Fig. 17-1). On the other hand, the rear portion 1b high absorbency and raised to the maximum value side of the topsheet material at the height h _b. The relationship is not particularly limited, but as one method of controlling the bulging, it is preferable that the height of the rear middle high absorption portion h _b < the height of the front middle high absorption portion h _a . By further increasing the height H _a of the front middle and high absorption portion, even if the front middle high absorption portion 1a directly absorbs a large amount from the discharge point G, it can preferably correspond to the excretion liquid, and when the individual packaging is performed, After the folding, the mid-high absorption portion 1b is easily located in the space of the separation region r.

As shown in Fig. 15, the front and rear portions are folded to create an overlapping portion, but in view of portability, it is desirable to form a thin individual package. In order to obtain a thin individual package, the absorbing convex portion may be made thinner, but it is preferable to make the rear convex portion thinner in consideration of the absorption of the front absorbing convex portion corresponding to the excretory portion.

As described above, first, the excretion fluid absorbed by the front middle-high absorption portion 1a is transferred to the lower absorbent body 1c, and even if there is a liquid or the like that flows into the rear portion, it can be accurately captured by the rear middle-high absorption portion 1b and absorbed. Also, it is preferred that the two convex portions are applied along the undulation of the body. From this point of view, in the ordinary menstrual sanitary napkin, specifically, the height H _{a of the} front middle and high absorption portion is preferably 2.5 to 10 mm, more preferably 3 to 8 mm. In terms of the height h _{b of the} rear middle high absorption portion, it is preferably 2 to 9 mm, more preferably 2.5 to 7 mm. Further, the difference between the front middle high absorption portion height h _a and the rear middle high absorption portion height h _b is preferably 0.5 to 5 mm, more preferably 1 to 4 mm. At this time, the thickness h _{c of the} lower absorbent body is preferably 1.5 to 6 mm, more preferably 2 to 5 mm. Further, in the present invention, the thickness of the absorbent body and the thickness of each of the portions (including the height of the middle and high portions) are determined according to the measurement methods shown in the following examples unless otherwise specified.

In the embodiment 2-1, at the time of folding, the rear portion s ₂ of the rear middle-high absorption portion 1b and the rear portion t _{2 of the} front middle-high absorption portion 1a are opposed to each other. In another embodiment of controlling the ridge in order to suppress the thickness of the overlapping portion as much as possible, in the second embodiment, the protruding height of the rear portion t ₂ of the front middle high-absorbing portion 1a is higher than the protruding height of the front portion t ₁ . Decrease obliquely (refer to Figure 17-2). On the other hand, the height of the rear middle-high absorption portion 1b is also lowered obliquely from the front portion s ₁ toward the rear portion s ₂ . In other words, according to this aspect, the rear middle-high absorption portion 1b and the front middle-high absorption portion 1a overlap each other when the inclined portions are opposed to each other at the time of folding, so that even if there is an overlapping portion, it is possible to suppress a part of the thickening, and if When the rear middle high absorption portion 1b is viewed, the front portion is not particularly lowered, and a sufficient height can be secured, so that a good barrier surface is formed.

As a method of controlling (lowering) the height of the ridge, a method of controlling the maximum height and a method of controlling the inclination of the overlapping portion have been described, but the method may be used alone or in combination, and the tilt may be only for the rear middle height. The absorbing portion performs processing, and the rear middle-high absorption portion can be enlarged with respect to the inclination angle or the length of the inclination.

In the menstrual sanitary napkin of the embodiment 2-1, the concave portion 19 constituting the hollow portion 19' of the mortar-like shape is formed in the separation region r. The concave portion 19 has an arc shape in plan view, in other words, has a crescent shape or a parabolic shape so as to face the protruding portion toward the front of the article and the inner side thereof toward the rear of the article. Further, the curved inner side of the arc-shaped recess is placed in contact with the front end of the rear middle high absorption portion 1b. Thereby, since the bending rigidity of the portion in which the concave portion 19 is provided is different from that in the periphery thereof, the starting point of the bending is likely to be formed, and the rear middle high-absorbing portion 1b is not bent, so that the front side of the rear high-absorption portion 1b is more accurately approached. The position of the end is folded in such a manner as to bend the baseline k ₁ . In this way, the recess is formed in advance so that the desired portion becomes a curved base line, whereby the high-absorption portion is well positioned in the space generated by the folding, for example, in the rear of the size, that is, the curved baseline k ₁ can be positioned as it is designed. It is ideal because the position is folded. Further, in the separation region r, as if a curved base line k _{1 is} desired, the menstrual sanitary napkin 30 is not folded over the front and rear high absorption portions 1a and 1b, so that it is difficult to impart the front middle high absorption portion 1a and the rear middle high absorption portion 1b. The influence of the crease in the middle, that is, the destruction of the convex portion or the residual of the bending print when worn. In the present invention, the term "the medium-high absorption portion is located in a (specific space)" means that the convex portion does not overlap with the other convex portion in a state in which the absorbent article is folded, or the overlap is only a part. Therefore, the main portion of the middle-high absorption portion (preferably, half of it) enters the separation region where the high-absorption portions are separated from each other, and when the convex portions overlap each other, the portion of the article is further suppressed. The thickness.

It is preferable that the shape of the concave portion 19 is an arc shape as viewed in plan as described above. The arc shape is formed, whereby the bending line k ₁ at least a part of the rear high-absorption portion 1b is accommodated as the base line along the shape of the concave portion 19 as described above in the separation region r. Further, as described above, the concave portion 19 is formed along the front end of the rear middle-high absorption portion, thereby increasing the liquid introduced into the lower layer absorbent body 1c by the barrier surface H disposed on the wall surface of the convex portion disposed therein. The effect is ideal in this respect. The depth of the concave portion 19 is preferably a depth at which sufficient flexibility of the lower absorbent body 1c can be obtained. The recess 19 can be formed by a thermal embossing method, for example, as described below. That is, the following heat embossing apparatus is used, that is, an embossing roll including a ridge portion having a shape corresponding to the concave portion on the circumferential surface, and a nip roller disposed opposite to the circumferential surface of the embossing roll. The absorbent body and the front sheet are inserted between the two rolls in such a manner that the side of the front sheet is on the side of the embossing roll. Further, the one body is heated and pressurized to form a recess. Further, in addition to the hot embossing method, it may be formed by an ultrasonic embossing method, a high frequency embossing method, or the like.

Fig. 18 is a cross-sectional view showing the periphery of the recess shown in Fig. 17-1 in an enlarged manner and in a pattern. An absorber 1c having a thickness h _c is disposed on the back sheet 3, and a rear middle-high absorption portion 1b is formed thereon, and is covered by the front sheet 2. As described above, the concave portion 19 is disposed so as to be close to the rear middle-high absorption portion, and the curved base line k ₁ is formed in the width w _d . The width direction w _{d of the} concave portion 19 in the longitudinal direction is preferably 3 to 25 mm, more preferably 5 to 20 mm. The length 1d (see Fig. 19) in the width direction of the concave portion 19 is preferably 20 to 50 mm, more preferably 25 to 40 mm.

Fig. 19 is a plan view schematically showing the arrangement relationship between the planar view shape of the recess in the 2-1 and the lower layer absorber 1c, the front middle high absorption portion 1a, and the rear middle high absorption portion 1b. . As described above, the concave portion 19 is curved in an arc shape and includes the protruding portion 19f and the inner portion 19r. The protruding portion 19f faces the front 10c direction, and the curved inner portion 19r is adjacent to the rear middle high absorption portion 1b. The inside of the recessed portion 19 is formed in a state of being recessed toward the entire periphery thereof, and is formed into a surface shape which is embossed by the embossing process in the region, and is regularly formed at a substantially equal interval in the recess. The (deep) portion is 19 m (corresponding to the indentations 19a to 19e of the first embodiment) and the higher (lighter) portion 19n. Further, the apex of the embossed convex portion is made lower than the surface of the lower layer absorbent body 1c.

Here, the folding form of the menstrual sanitary napkin in the individual package of the embodiment 2-1 will be described in more detail. In the present embodiment, the bending of the curved baseline k ₁ 2-1 menstrual napkin, the rear part 1b of high absorbency in the front surface of the opposing contact portions 1a and located within the high absorbency zone separated (see FIG. 17-2).

On the other hand, in the case where the separation region is not present and the middle and high absorption portions are integrally formed one after the other, the high absorption portions overlap each other in the front and rear at the time of folding, and the thickness of the high absorption portion in the individual package becomes the front side of the middle high absorption portion. The thickness h _a is approximately h _a + h _b added to the thickness h _{b at the} rear. Further, for example, in the individual package of the menstrual sanitary napkin in which the middle-high absorption portion is formed from the front abdominal side to the rear back side, the bending line is disposed on the convex portion in any case, so that the bending line is adhered to the middle-high absorption portion. Deformation can also adversely affect the wearing or absorption.

On the other hand, in the second embodiment, as can be understood from reference to Fig. 17-2, the thickness of the convex portion of the absorber at the time of folding can be made substantially h _a . Further, in the embodiment 2-1, since the portion is not folded on the convex portion, the influence of the bend is small. As a result, when worn out from a single package, the wearing feeling is good when worn, and absorption and leakage due to breakage of the absorbent body can be suppressed. In particular, the front middle-high absorption portion that directly needs the absorption of more menstrual blood near the excretion point and the barrier portion or the stop portion that leaks as the absorption rear portion are disposed, and the high-absorption portion is functionally divided. Moreover, each of the convex portions in the front and the rear is disposed separately from the concave portion of the body of the user, and the separated regions in the middle are in a manner of undulating portions along the body of the user. And the configuration, as a whole, can achieve extremely high adhesion to the skin. That is, it is firmly adhered to the desired portion, whereby the desired absorbability can be obtained, and the skin of the user can be softly applied by the cushioning property of the convex portion, and a good wearing feeling can be obtained. .

Next, as another preferred embodiment of the second embodiment of the present invention (Embodiment 2-2), there is no single menstrual sanitary napkin having an upper slanting and including a high absorption portion among two substantially rectangular parallelepiped shapes. The package is described. Fig. 20-1 is a cross-sectional view of the menstrual sanitary napkin 40 in the embodiment 2-2, and Fig. 20-2 is a cross-sectional view schematically showing a state in which the menstrual sanitary napkin shown in Fig. 20-1 is individually packaged. In Fig. 20-2, the two medium-high absorption portions 1a, 1b do not overlap at all, and 1b is completely located in the separation region r. Thereby, the thickness of the convex portion of the absorber at the time of folding can be set to substantially h _a even if there is no shape in which the upper surface is inclined. 20-1 and 20-2 show an embodiment in which the high absorption portions do not overlap each other at the time of folding, but it is also possible to suitably adopt a form in which at least a part of the rear middle high absorption portion 1b is located in the separation region r. In other words, one of the middle and high absorption portions may overlap when folded as needed in consideration of absorption performance and the like.

The individual package of the absorbent article according to the second embodiment of the present invention is not limited to the above embodiments, and may be a combination of such structures or may be a structure different from the above. For example, the front middle high absorption portion and the rear middle high absorption portion may be changed in consideration of adhesion to the skin and leakage prevention. For example, in the above-described embodiment 2-1, the front middle high absorption portion is formed into a rectangular shape, and the rear middle high absorption portion is formed. It is preferable that the rear portion 10d of the article is formed in a trapezoidal shape with a narrow front end (see FIGS. 16 and 19), and is easily attached to the human body. In this case, it is preferred that the width of the bottom side of the high absorption portion in the trapezoidal rear side is wider than the front middle high absorption portion. Further, it is also possible to use a person whose rear middle and high absorption portions are triangular or rectangular.

Further, it is preferable that the shape of the front middle high-absorbent portion and the rear middle-high-absorbent portion in plan view is selected as an embodiment in which the two are fitted in the planar direction when folded in a single package. Fig. 21 showing such an embodiment schematically shows a plan view of the shape of the absorbent body in the menstrual sanitary napkin of another preferred embodiment (Embodiment 2-3) of the second embodiment of the present invention. This figure is a plan view patterned in a manner corresponding to FIG. 19 of Embodiment 2-1. Before the lower layer absorbent body disposed on the high absorbency portion 1c Prescription 1a, comprises a protruding end protruding toward the rear of the article of t _3. On the other hand, the rear middle high absorption portion 1b includes an entrance portion (notch portion) s _{3 that} enters toward the rear of the article. By so setting, at the time in a curved baseline k ₁ and folded so that the rear of the high absorbency portion disposed in 1D, and forward high-absorbent projecting end portion 1a of t ₃ into the portion (cutout portion) and the rear of the high absorbency portion of s ₃ fitted So that the convex portions do not overlap each other.

22(a) and 22(b) are plan views and cross-sectional views showing the menstrual sanitary napkin 50 in which the concave portion 19 which is convexly protruded rearward in a plan view is formed in the separation region. The figure is shown as a modification of the embodiment shown in Fig. 15, and is further illustrated as a menstrual napkin. Further, the auxiliary lines a to f are attached so as to easily understand the relationship between the plan view of Fig. 22 (a) and the sectional view of (b), and the front sheet and the back sheet are indicated by a chain line, and are depicted by the above. The shape of the item.

As shown in Fig. 22(a), when the interval between the recesses in the width direction is narrowed by the convex portion of the U-shaped concave portion 19 which is convex toward the rear, the thickness of the lower absorbent body is reduced. The middle part of the middle and high absorption part is accommodated in the middle, so the shape of the menstrual sanitary napkin in a single package state is easy to stabilize.

As a shape (variation) of the recess in the separation region which exhibits the same effect, as shown in FIG. 22(c), there are (1) U-shape, (2) " The shape of the shape can also be made thinner by the recess as in (3) or (4). In the concave portion thus formed, a base line is easily disposed in the concave portion on the rear side, and the treatment thus set is preferable because the rear middle high absorption portion is located in the separation region. The concave portion in Fig. 22(c) is formed over almost the entire region of the separation region, and the curved base line is easily formed on the rear side in the longitudinal direction of the concave portion, but it is preferable to form it on the rear side. It is formed to the side of the front middle high absorption part 1a. Further, the concave portion of the above-described modification may be configured by a linear compression portion as shown in the drawing, or may be formed by alternately connecting the high compression portion and the low compression portion to have a corrugated cross section.

Hereinafter, each member used in each of the above embodiments will be described.

The front sheet preferably contains a material which is liquid permeable and soft to the touch of the skin. For example, a non-woven fabric made of a natural fiber such as cotton or a non-woven fabric made of a hydrophilic material for various synthetic fibers can be used. The back sheet is preferably a sheet material containing liquid impermeability. The back sheet may also be water vapor permeable if necessary. Specifically, it is preferred to use a porous film in which a film made of a synthetic resin such as polyethylene obtained by dispersing a fine powder containing a filler such as calcium carbonate is dispersed in order to obtain sufficient water vapor permeability. There are fine holes in the opening. Further, the absorbent article may also include a side panel. Examples of the side sheet include a nonwoven fabric, a film sheet, paper, and the like. From the viewpoint of leakproofness, it is preferred to form a side sheet by a liquid impervious or impene-permeable hydrophobic nonwoven fabric or a leak-proof film sheet. The sheet may be one sheet, or may be formed into two or more sheets in combination with a functional sheet or the like. As the material for forming the absorbent body, a user in the absorbent article can be usually used. Specifically, for example, a fiber assembly or a combination of a fiber assembly and a polymer water-absorbing polymer can be used. As the fibers constituting the fiber assembly, hydrophilic natural fibers such as pulp fibers or synthetic fibers (preferably those subjected to hydrophilization) can be used. In the present invention, since the front middle high absorption portion and the rear middle high absorption portion are separated from each other, different absorber materials can be used for the two convex portions. For example, it is possible to use a process such as a pulp-based fiber in which the front middle and high-absorbent portion pays attention to absorbability, and a synthetic fiber to be used in the rear middle-high-absorbent portion.

The absorbent article of the present invention is not limited to the specific configuration of the menstrual sanitary napkin described above, and for example, other functional members or structures may be applied. Further, in the present invention, the absorbent article is not particularly limited, and includes an absorbent article such as a liquid, but preferably a menstrual napkin, a sanitary pad (vaginal secretion pad) or an incontinence pad. .

[Examples]

Hereinafter, the first embodiment of the present invention will be described in more detail based on the examples, but the present invention is not limited thereto.

(Example)

As the front sheet, a liquid-permeable non-woven fabric having a basis weight of 25 g/m ² and a thickness of 0.3 mm was prepared. As the lower absorbent body, a powder in which an absorbent polymer (SAP) was added to a pulp fiber deposit to a basis weight of 300 g/m ² and a thickness of 3.5 mm was prepared and coated with a fiber sheet. By. On the other hand, the same material was used to prepare the upper layer absorber so as to have a basis weight of 500 g/m ² and a thickness of 5.5 mm, and the front and rear middle and high absorption portions were assembled by being adhered to the lower layer absorber. The absorber. As the side sheet, a non-woven fabric having a liquid impermeability of 20 g/m ² and a thickness of 0.2 mm was prepared. As the back sheet, an air-permeable sheet having a thickness of 0.3 mm of a non-woven fabric was placed on the outer surface of the liquid-impermeable porous sheet. In addition, the thickness of the above-mentioned absorber was measured by using a thickness gauge "PEACOCK UPRIGHT DIAL GUAGE No. 207" (trade name) manufactured by Ozaki Manufacturing Co., Ltd. under a load of 5 g/cm ² . Five samples were measured, and the average value was calculated to be the thickness. The thickness of the other sheet material was carried out under a load of 8 g/cm ² using a thickness gauge "PEACOCK UPRIGHT DIAL GUAGE No. 25" (trade name) manufactured by Ozaki Manufacturing Co., Ltd. Five samples were measured, and the average value was calculated to be the thickness.

The front sheet, the absorber, and the side sheet are combined, and the desired portion is embossed or joined by hot melt or the like to produce a menstrual napkin of the form shown in Fig. 1. In this case, the embossed portion (indentation) constituting the rigid region is formed as the pattern A shown in FIG. On the other hand, the menstrual sanitary napkin in which the rigid region is formed by the embossed portion (indentation) of the pattern B to I shown in Fig. 12 is produced.

(Comparative example)

The menstrual sanitary napkin was produced in the same manner as in the above embodiment. However, the embossing corresponding to the patterns A to I is not provided, and the menstrual sanitary napkin having no rigid region is formed.

The menstrual sanitary napkins produced in the examples and the comparative examples were individually packaged together with the packaging sheets as shown in Figs. 13 and 14 and left for several days. Thereafter, the packages of the individual packages were disassembled, and the creases remaining in the rigid regions and the corresponding portions of the bent positions were visually evaluated. The evaluation judged the difference between the crease in the approximate center of the article at the bending position and the crease in the crease portion. The evaluation was conducted by 3 experts. The evaluation results are shown in Fig. 12 from "◎", "○", "△" and "X", which are evaluated as being good according to the relationship between the crease depth and the state and the wearing performance. Further, although the comparative example is not shown in the figure, the evaluation of any creases in the center of the article and the raised pleats is a result of "x".

When the results of the absorber portion of the above test results are described in more detail, the "◎" is substantially free of creases, and the "○" has almost no creases. Although "△" has a crease attached, it is not obvious when the bent portion is elongated. "X" is clearly attached with creases, and traces remain even if stretched. In particular, the crease state of the comparative example is different from that of the embodiment, and in addition to the deep linear creases, a plurality of crease-like creases in which a plurality of creases extend in an irregular direction remain.

When the state in which the wrinkles are raised is described, the wrinkles of the "○" are hardly damaged. The fold of the "△" was slightly damaged, but it was not obvious. The wrinkles of the "X" are deformed, and the wrinkles are broken and the shape becomes unstable.

1. . . Absorber

1a. . . Front high absorption part

1b. . . Rear high absorption part

1c. . . Lower absorber

2. . . Front sheet

3. . . Back sheet

4. . . Side sheet

4k. . . Stand up the fold

8. . . Flank

9. . . Rigid area

10, 20, 30, 40, 50. . . Absorbent article

11,12. . . Point groove

19. . . Embossed part

19a~19e. . . Indentation

25. . . Peripheral seal

26. . . Circular embossing

27. . . Side embossing

33. . . label

34. . . Packaging sheet

35. . . Sealing part

41. . . Base wall

42. . . Elastic expansion joint

42a. . . Medial protrusion

42b. . . Outer protrusion

48. . . Multi-layer

100, 100'. . . Single package

Fig. 1 is a perspective view schematically showing a state in which the menstrual sanitary napkin is opened in a preferred embodiment (Embodiment 1-1) of a single package according to the first embodiment of the present invention.

Figure 2 is an enlarged cross-sectional view taken along line II-II of Figure 1.

Figure 3 is an enlarged cross-sectional view of the three-dimensional pleats taken along line III-III of Figure 1.

Fig. 4 is a plan view showing the main portion of the menstrual sanitary napkin shown in Fig. 1 in a schematic manner.

Figures 5(a)-(c) are schematic views for explaining the folding of the form of the menstrual napkin shown in Figure 4.

Fig. 6 is a plan view showing the main part of the construction of the menstrual napkin for comparison.

7(a) and 7(b) are schematic views for explaining the folding form of the menstrual sanitary napkin shown in Fig. 6.

Fig. 8 is a plan view showing the state in which the menstrual sanitary napkin is opened from the side of the front sheet as another preferred embodiment (embodiment 1-2) of the individual package of the first embodiment of the present invention.

Fig. 9 is a schematic view showing a cross section of a three-dimensional wrinkle (leakage prevention wall) in each portion of the menstrual napkin of Fig. 8, Fig. 9(a) is a sectional view taken along line XI-XI of Fig. 8, and Fig. 9(b) is a diagram Fig. 9(c) is a cross-sectional view taken along the line XIII-XIII of Fig. 8.

Fig. 10 is a perspective view showing a schematic form of the menstrual sanitary napkin of Fig. 8 in a natural state.

Fig. 11 is a pattern diagram showing an example of an embossed pattern forming the rigid regions of the first embodiment 1-1 and 1-2.

Fig. 12 is a pattern diagram showing the shape change of the embossed portion forming the rigid region as another preferred embodiment of the first embodiment of the present invention.

Fig. 13 (a) and (b) are perspective views showing, in order, a state in which the menstrual sanitary napkin of the embodiment 1-1 is folded together with the packaging sheet.

Fig. 14 is a partially cutaway perspective view showing a single package of the menstrual napkin of the embodiment 1-1.

Fig. 15 is a partially broken perspective view showing a single package of the menstrual sanitary napkin (Embodiment 2-1) which is a preferred embodiment of the second embodiment of the present invention.

Fig. 16 is a partially broken perspective view showing the absorbent article (menstrual sanitary napkin) when the package of the individual package shown in Fig. 15 is taken apart and stretched.

Fig. 17-1 is a cross-sectional view showing a section taken along the line IV-IV in Fig. 16.

Fig. 17-2 is a cross-sectional view schematically showing a state in which the menstrual napkin shown in Fig. 17-1 is folded.

Fig. 18 is a cross-sectional view showing the periphery of the concave portion in Fig. 17-1 in an enlarged manner and in a schematic manner.

Fig. 19 is a plan view schematically showing the positional relationship between the absorbent body of the menstrual sanitary napkin of the embodiment 2-1 and the concave portion disposed therein.

Fig. 20-1 is a cross-sectional view showing the menstrual sanitary napkin of another preferred embodiment (Embodiment 2-2) of the second embodiment of the present invention.

Fig. 20-2 is a cross-sectional view schematically showing a state in which the absorbent body shown in Fig. 20-1 is individually packaged.

Fig. 21 is a plan view schematically showing the absorbent body of the menstrual sanitary napkin and its folded shape in still another preferred embodiment (Embodiment 2-3) of the second embodiment of the present invention.

Fig. 22 is a view schematically showing a modification of the menstrual sanitary napkin in the second embodiment of the present invention, wherein Fig. 22(a) is a plan view of the menstrual sanitary napkin, and Fig. 22(b) is a view of Fig. 22(a). A cross-sectional view of the BB line cross section, and (1), (2), (3), and (4) of Fig. 22 (c) are plan views showing still other modified examples of the concave portion.

1. . . Absorber

1a. . . Front high absorption part

1b. . . Rear high absorption part

1c. . . Lower absorber

2. . . Front sheet

4. . . Side sheet

4k. . . Stand up the fold

8. . . Flank

9. . . Rigid area

10. . . Absorbent article

10a. . . Lateral protrusion

10b. . . Front and rear of the length direction

11,12. . . Point groove

13. . . Near the rigid area

19. . . Embossed part

S. . . Front middle high absorption part 1a front end

T. . . Rear rear high absorption part 1b rear end

P. . . Separation area

k ₁ , k ₂ , k ₃ . . . Bending position

Claims (9)

A single package of an absorbent article, which comprises a front sheet, a back sheet, and an absorbent article interposed between the two sheets, together with a packaging material, and is present in the absorbent body The front middle high absorption part and the rear middle high absorption part are raised toward the skin side of the user, and the two middle high absorption parts are disposed apart from the front side and the rear side of the front side by the separation area, and the absorbent article is located The separation region is folded at a bending position, and in the folded state, all or a part of the rear middle high absorption portion enters a space of the separation region between the two middle high absorption portions. The single package of the absorbent article according to claim 1, wherein the ridge height of the rear side upper high absorption portion is lower than the ridge height of the front side portion, and the rear middle high absorption portion is overlapped with the rear middle high absorption portion Part of it. The single package of the absorbent article according to claim 1 or 2, wherein in the separation region of the absorbent body, a concave portion that is compressed from the skin surface side and that joins the absorbent body and the front sheet is formed, and the concave portion becomes the above-mentioned Bending position. The single package of the absorbent article of claim 1 or 2, wherein the concave portion has an arc shape in a plan view of the article, wherein the concave portion is curved in a circular arc shape toward the front of the article, and the curved portion thereof is curved The inner portion of the arc shape is disposed adjacent to the vicinity of the front end edge of the rear middle high absorption portion or the front end edge portion. A single package of the absorbent article of claim 3, wherein the recess is a shape having an arc shape when the article is viewed in a plan view, wherein the protruding portion bent in an arc shape in the concave portion faces the front of the article, and the inner portion of the curved arc-shaped portion is adjacent to the front edge of the rear middle high-absorption portion or The front end edges are arranged adjacent to each other. The individual package of the absorbent article of claim 1 or 2, wherein the ridge height of the rear middle high absorption portion is lower than the ridge height of the front middle high absorption portion. The individual package of the absorbent article of claim 3, wherein the ridge height of the rear middle high absorption portion is lower than the ridge height of the front middle high absorption portion. The individual package of the absorbent article of claim 4, wherein the raised height of the rear middle high absorption portion is lower than the raised height of the front middle high absorption portion. The individual package of the absorbent article of claim 5, wherein the raised height of the rear middle high absorption portion is lower than the raised height of the front middle high absorption portion.