JP7169131B2 - absorbent article - Google Patents

Description

The present invention relates to absorbent articles.

2. Description of the Related Art Absorbent articles such as sanitary napkins are known to have a pair of flap-like portions extending from the outside in the width direction of the main body, that is, wings. Each wing is folded back toward the undergarment when worn, and is detachably fixed to the undergarment by an adhesive portion provided on the backsheet side.

Absorbent articles having such wings are known to be easily removed from undergarments. For example, some underwear are constructed such that the wings are broken when the main body is pulled so as to be peeled off from the underwear. Patent Literature 1 discloses a pair of first and second wings that extend outward in the width direction from a body portion and overlap each other when the underwear is worn, and the first wing has a tear-inducing portion that extends in the front-rear direction. An absorbent article comprising:

Japanese Patent No. 6146783

In the configuration disclosed in Patent Document 1, users with weak strength may not be able to break the wings when removing the absorbent article from underwear. On the other hand, it is conceivable to form the portion of the wing that is likely to break easily to be more fragile. There is a possibility that the original function of the wing to be fixed to the wing cannot be exhibited.

In view of the above points, an object of one aspect of the present invention is to provide an absorbent article that can be more easily removed from underwear by breaking the wings more easily while ensuring the original function of the wings. and

A first aspect of the present invention is an absorbent body comprising a body having a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body provided between the topsheet and the backsheet. The main body has a predetermined length in the front-rear direction and a predetermined width in the width direction orthogonal to the front-rear direction, and forms a pair that extends outward in the width direction of the main body. Wings are provided, and at least one of the wings is provided with an easily breakable portion that extends obliquely with respect to the center line extending in the front-rear direction.

According to the first aspect, the absorbent article has a pair of wings, at least one of which is provided with an easily tearable portion. Therefore, the wing can be broken at the easily breaking portion by pulling the main body in the action of removing the absorbent article (removing action). Therefore, it is possible to save the user from having to hold the wing by hand and peel it off from the underwear when removing the wing.

In this aspect, at least one of the wings is provided with the easily breakable portion extending obliquely with respect to the center line in the front-rear direction. Therefore, when the absorbent article is peeled off from the underwear so that the tearing starts from the end of the easy-to-break portion far from the main body in the width direction, the direction in which the wing is pulled and the direction in which the easy-to-break portion extends are close to each other. , facilitating initiation of fracture. Furthermore, as the removal operation of the absorbent article progresses, the direction in which the wing is pulled and the direction in which the easily rupturable portion extends become closer, so rupture at the easily rupturable portion tends to progress. As a result, the wings can be easily broken with a light force, and the absorbent article can be easily removed.

In a second aspect of the present invention, the breakable portion includes a line forming an angle of 5-50° with respect to the center line.

According to the second aspect, since the easy-to-break portion includes a line forming a predetermined angle, the direction in which the wing is pulled and the extending direction of the easy-to-break portion can more reliably be brought closer to each other, while the wing is The distance between the pulling position and the breaking start position should not be too far. Therefore, the wing can be broken more easily along the easily breaking portion, and the above effect of facilitating removal of the absorbent article can be improved.

In the third aspect, the easily breakable portion has a first end positioned at an edge portion in the front-rear direction of the wing, and extends from the first end to approach the main body.

According to the third aspect of the present invention, since the easily breakable portion has the first end located at the edge of the wing, the wing can be broken from the edge, and the easily breakable portion can be broken. can be easily started. Furthermore, in this aspect, since the easy-to-break portion extends from the first end in a direction approaching the main body, the first end of the wing of the absorbent article is positioned so that the breaking starts from the first end. When the absorbent article is pulled off from the underwear by holding one end, the direction in which the wing is pulled approaches the direction in which the easily tearable portion extends from the beginning to the end of the removal operation of the absorbent article. Therefore, the wing can be easily broken at the easily breakable portion.

In a fourth aspect of the present invention, the first end is located at a distance of 10 mm or more from the main body in the width direction.

According to the fourth aspect, since the first end is located at a predetermined distance or more from the main body in the width direction, the breaking start position can be separated from the folding position of the wing. Therefore, it is possible to prevent unintentional breakage of the edge of the wing other than during the removal operation (for example, during the installation operation).

In the fifth aspect of the present invention, the wings can overlap each other and be joined to each other via adhesive portions provided on the widthwise outer side of the easily breakable portion when attached.

According to the fifth aspect, the pair of wings can be overlapped and joined, so the wings can be more reliably fixed to the underwear. Furthermore, after the wing is broken at the easily breakable portion, the portion of the wing outside the easily breakable portion in the width direction (the portion farther from the main body) can be left joined to the other wing. Therefore, when one of the wings is broken by removing the absorbent article, the broken piece of the wing can be removed together with the other wing without leaving the broken piece of the wing on the underwear.

In a sixth aspect of the present invention, one of the wings has a first easily breakable portion having the first end forward, and the other wing has a second easily breakable portion having the first end rearward. have a part.

According to the sixth aspect, when the user removes the absorbent article by peeling it off from the front, the wing having the first easily breakable portion having the first end on the front can be broken. On the other hand, when the user removes the absorbent article by peeling it off from the rear, the wing having the second easily breakable portion having the first end at the rear can be broken. Therefore, according to this aspect, the absorbent article can be easily peeled off and removed from the underwear at either the front or the rear.

According to one aspect of the present invention, there is provided an absorbent article in which the wings can be broken more easily and removed from underwear more easily, while ensuring the original function of the wings.

1 is a plan view of an absorbent article according to one aspect of the present invention; FIG. FIG. 1B is a sectional view taken along the line II of FIG. 1A; FIG. 4 is a diagram showing a state in which the wings of the absorbent article according to one embodiment of the present invention are folded back; It is a figure explaining the operation|movement which removes an absorbent article. FIG. 10 is a diagram illustrating wing breakage and deformation in the action of removing the absorbent article. FIG. 10 is a diagram showing a modified example of an absorbent article according to one embodiment of the present invention;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each drawing, unless there is a particular description, the same reference numerals may be attached to the same or corresponding configurations, and the description thereof may be omitted. Also, the drawings are schematic to aid understanding of the invention, and some dimensions may be drawn larger or smaller.

FIG. 1A shows a plan view of an absorbent article 1 according to one aspect of the invention. Further, FIG. 1B shows a cross section taken along line II of FIG. 1A. As shown in FIGS. 1A and 1B, an absorbent article 1 includes a liquid-impermeable backsheet 2, a liquid-permeable topsheet 3, and an absorbent body 4 provided between the two sheets 2 and 3. and a main body (absorbent article main body) 8 having In order to retain the shape of the absorbent body 4, the absorbent body 4 may be wrapped with a wrapping sheet made of crepe paper, non-woven fabric, or the like. When using the absorbent article 1, the body 8 is worn so that the back sheet 2 side of the main body 8 is fixed to underwear (such as shorts) and the top sheet 3 side is on the skin side.

The main body 8 has an elongated shape having a predetermined length in the front-rear direction (first direction D1 in the drawing) and a predetermined width in the width direction (second direction D2 in the drawing) orthogonal to the front-rear direction D1. have. Although the width of the main body 8 is substantially constant in the illustrated example, it may vary in the front-rear direction D1. In the illustrated example, the absorbent article 1 has a plan view shape that is substantially symmetrical with respect to a center line (front-rear direction center line) CL extending in the front-rear direction D1. It does not necessarily have to be line symmetrical. Further, other configurations (thickness, material, etc.) of each component of the absorbent article 1 may be substantially line-symmetrical with respect to the front-rear center line CL, or may be line-asymmetrically.

Although the total length of the absorbent article 1 is not particularly limited, it can be about 200 to 420 mm. The width of the main body 8 of the absorbent article 1 is also not particularly limited, but can be about 50 to 110 mm.

The absorbent article 1 includes a central region M including a region corresponding to the bodily fluid outlet (region corresponding to the bodily fluid outlet) when worn, a front region F in front of the central region M, and a rear region behind the central region M. R. The central region M has wings W1, W2 (details will be described later) extending from both sides thereof. The front region F can be a region from the front starting point of the wing to the front edge, and the rear region R can be a region from the rear starting point of the wing to the rear edge. .

At the front and rear edge portions of the absorbent body 4, the outer edges of the backsheet 2 and the topsheet 3 are joined by adhesive such as hot melt, heat sealing, ultrasonic sealing or other bonding means. On the sides of the absorbent body 4, the side nonwoven fabrics 7, 7 provided along the longitudinal direction D1 on both sides of the topsheet 3 side and the backsheet 2 are joined by the above-mentioned adhesive means. Wings W1, W2 may be formed by.

As the back sheet 2, a sheet material having at least water impermeability, such as an olefin resin sheet such as polyethylene or polypropylene, can be used. A laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or a laminated sheet of a nonwoven fabric in which a waterproof film is interposed to substantially ensure liquid impermeability can be used. Moreover, from the viewpoint of preventing stuffiness, it is more desirable to use a material having moisture permeability. Such water-impervious/moisture-permeable sheet materials are produced by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in a uniaxial or biaxial direction. Porous sheets can be used.

The surface sheet 3 is a liquid-permeable sheet that allows bodily fluids such as menstrual blood, vaginal discharge, and urine to quickly pass therethrough. As the surface sheet 3, a perforated or non-perforated nonwoven fabric, a porous plastic sheet, or the like is preferably used. The material fibers that make up the nonwoven fabric include, for example, olefins such as polyethylene and polypropylene, synthetic fibers such as polyester and polyamide, regenerated fibers such as rayon and cupra, blended fibers thereof, and natural fibers such as cotton. It can be used in combination of two or more. Examples of nonwoven fabric processing methods include spunlace, spunbond, thermal bond, meltblown, needle punch, and the like. Among these processing methods, the spunlace method is preferable because it can produce a soft nonwoven fabric, the spunbond method is preferable because it can produce a nonwoven fabric with excellent drapeability, and the thermal bonding method is preferable because it can produce a bulky and soft nonwoven fabric. In addition, composite fibers such as core-sheath type fibers, side-by-side type fibers, split type fibers, etc. can be used in which a fiber having a high melting point is used as a core and a fiber having a low melting point is used as a sheath.

Absorbent body 4 interposed between backsheet 2 and topsheet 3 is not limited as long as it can absorb and retain bodily fluids, but it preferably contains flocculent pulp and a water-absorbing polymer. As the absorbent polymer, superabsorbent polymer (SAP), superabsorbent fiber (SAF) and combinations thereof can be used. The pulp includes chemical pulp obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. Broad-leaved trees, softwoods, and the like are used as raw materials for chemical pulp, and softwoods are preferably used because of their long fiber length.

Synthetic fibers may also be mixed in the absorber 4 . As synthetic fibers, polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used. can also be used. In addition, composite fibers such as core-sheath type fibers, side-by-side type fibers, split type fibers, etc., in which a fiber having a high melting point is used as a core and a fiber having a low melting point is used as a sheath, can also be used. It is also possible to use hydrophobic fibers surface-treated with a hydrophilizing agent to impart affinity to body fluids.

The thickness of the absorbent body 4 can be in the range of 0.5 to 25 mm, preferably in the range of 1.5 to 6.5 mm. The absorbent body 4 may not have a uniform thickness over the front surface, and may have a structure in which the area corresponding to the bodily fluid discharge port in the central area M and its vicinity, and the widthwise central portion of the rear area R are swollen. can.

As the side nonwoven fabric 7, a water-repellent treated nonwoven fabric or a hydrophilic treated nonwoven fabric can be used. For example, in order to improve the effect of preventing permeation of menstrual blood, vaginal discharge, and the like, or to improve the texture, it is preferable to use a water-repellent nonwoven fabric coated with a silicon-based or paraffin-based water repellent agent. In order to increase the absorbability of menstrual blood and the like in the wing W, it is preferable to use a hydrophilically treated nonwoven fabric as the material of the nonwoven fabric. As the type of nonwoven fabric, an air-through nonwoven fabric that is soft and resistant to creases and wrinkles is preferable.

As shown in FIGS. 1A and 1B, the absorbent article 1 of this embodiment includes a pair of first wing W1 and second wing W2 extending outward in the width direction D2 from the main body 8 . The first wing W1 and the second wing W2 are configured so that when the absorbent article 1 is put on, they can be folded back toward the undergarment and detachably joined to the undergarment and/or between the wings. . As a result, the absorbent article can be securely fixed to the underwear, so that the absorbent article can be prevented from slipping or twisting during wearing.

The first wing W1 and the second wing W2 have line-symmetrical contour shapes with respect to the longitudinal centerline CL as the axis of symmetry, but the contour shapes of both do not necessarily have to be line-symmetrical.

Further, the maximum length of the wing (the length in the front-rear direction D1) may be approximately 40 to 110 mm for both the first wing W1 and the second wing W2. In the illustrated form, each wing has its widest width at the proximal end of the wing (the interface with body 8). The maximum width of the wing (the length in the width direction D2) may be any size that does not exceed the width of the main body 8, and may be about 20 to 65 mm.

As shown in FIGS. 1A and 1B, adhesive portions 41A and 41B may be provided on the first wing W1, and adhesive portions 42A and 42B may be provided on the second wing W2 on the back sheet 2 side. Such an adhesive portion allows for releasable attachment to the undergarment and/or between the wings as described above.

The adhesive part may be a layer formed by applying an adhesive, and may be configured as a tape coated with such an adhesive layer. As the adhesive layer, for example, one containing a styrene-based polymer, a tackifier, a plasticizer, or a combination thereof as a main component is preferably used.

Styrene-based polymers include styrene-ethylene-butylene-styrene block copolymers, styrene-butylene-styrene block copolymers, styrene-isobutylene-styrene copolymers, styrene-butadiene-styrene block copolymers, and the like. , one or more of these can be used.

Moreover, as a tackifier and a plasticizer, a solid thing can be used at normal temperature. Examples of tackifiers include C5-based petroleum resins, C9-based petroleum resins, dicyclopentadiene-based petroleum resins, rosin-based petroleum resins, polyterpene resins, and terpene phenol resins. Examples of plasticizers include monomer plasticizers such as triflesyl phosphate, dibutyl phthalate, and dioctyl phthalate, as well as polymer plasticizers such as vinyl polymers and polyesters.

FIG. 2 shows a state in which the first wing W1 and the second wing W2 of the absorbent article 1 are folded back toward the underwear (the underwear is not shown). Since FIG. 2 is a plan view of the absorbent article 1 viewed from the back sheet 2 side, the plan view shown in FIG. 1A is left-right reversed. Wings before folding are also indicated by two-dot chain lines.

As shown in FIG. 2, the first wing W1 and the second wing W2 are folded back toward the back sheet 2 near the boundary line between the main body 8 and each wing (base end of the wing). A terminal portion of the first wing W1 in the width direction D2 and a terminal portion of the second wing W2 in the width direction D2 are overlapped with each other. In the illustrated embodiment, the second wing W2 is first folded back toward the underwear, and the first wing W1 is superimposed thereon. The second wing W2 is joined to the underwear by the adhesive portion 52A, and the first wing W1 is joined to the second wing W2 by the adhesive portion 41A. The order in which both wings are overlapped is not particularly limited, and the first wing W1 may be folded first, and the second wing W2 may be overlapped thereon.

When both wings overlap each other as shown in the drawing, the width of the overlapping portion is preferably about 5 to 30 mm.

FIG. 3(a) shows a schematic perspective view of a state in which the absorbent article 1 is attached to the underwear S. As shown in FIG. FIG. 3(a) is a diagram of the attached absorbent article 1 obliquely seen from the skin side (the side of the topsheet 3). The wings may be folded back toward the undergarment S and joined to the undergarment S by the adhesive portion described above. Only one wing is shown as wing W in FIG.

When removing the absorbent article 1 that has been worn once, the user usually holds either end of the main body 8 of the absorbent article 1 in the front-rear direction D1 and pulls the underwear away from the underwear. Remove the absorbent article from the For example, the absorbent article 1 can be pulled away from the undergarment S by holding the front end of the absorbent article 1 (the front end of the main body 8), as indicated by the arrow in FIG. 3(a). The force that pulls the main body 8 is also transmitted to the wings W joined to the underwear S.

FIG. 3(b) shows an intermediate stage of the removal operation of the absorbent article 1. As shown in FIG. As shown in FIG. 3(b), the main body 8 is raised in a direction away from the underwear, and the wings W are pulled from the main body 8, that is, from the proximal ends of the wings W. As shown in FIG.

When trying to peel off the absorbent article 1 from the underwear by holding the main body 8 in this way, the joining of the wings to the underwear S and/or the joining of the wings to each other is not strong in a configuration that does not have an easily breakable portion. If so, removal may require a relatively large amount of force. In some cases, the absorbent article cannot be removed from the undergarment simply by pulling it, and the user has to hold the wings to separate the joints, which complicates the operation of removing the absorbent article.

On the other hand, in this embodiment, at least one of the pair of wings is provided with an easily breakable portion. Therefore, the pulled wing can be broken at the easily breakable portion, saving the user the trouble of removing the wing from the underwear.

In the form shown in FIGS. 1 and 2, the first wing W1 and the second wing W2 are respectively provided with a first easily breaking portion 21 and a second easily breaking portion 22 (together, they may be simply referred to as an easily breaking portion). It is In this specification, the easily breakable portion is a portion that is more fragile than other portions and is likely to break at that position when an external force such as pulling or twisting is applied. The breakable portion can be formed by, for example, perforations. The perforations are formed by alternating layers that are cut (cuts) and not cut (ties). In this case, the cut portion may be formed by penetrating both layers of the back sheet 2 and the side nonwoven fabric 7 constituting the wing, or by penetrating either one of the layers. good too. Moreover, the easy-to-break portion can be formed by making the thickness of that portion thinner than that of other portions, or by linearly applying an agent that weakens the material.

In the illustrated embodiment, the first easily tearable portion 21 and the second easily tearable portion 22 are formed as linear perforations extending from the front edge to the rear edge of the first wing W1 and the second wing W2, respectively. ing.

As shown in FIGS. 1A and 2, both the first easily breakable portion 21 and the second easily breakable portion 22 extend obliquely with respect to the longitudinal centerline CL. In this specification, the easy-breaking portion being inclined indicates that it extends in a direction including a horizontal component and a vertical component with respect to the extending direction of the easy-breaking portion. It is preferable that the direction in which the easily breakable portion extends is inclined at an angle of 60° or less with respect to the center line CL in the front-rear direction.

In the illustrated embodiment, the first easily breakable portion 21 is a line (linear portion) that approaches the main body 8 from the front to the rear, and the second easily breakable portion 22 is a line that approaches the main body 8 from the rear to the front. (linear portion). In FIG. 1A, a first easily breakable portion 21 that approaches the main body 8 from the front to the rear is formed on the right side, and a second easily breakable portion 22 that approaches the main body 8 from the rear to the front is formed on the left side. However, in FIG. 1A, the left wing is formed with an easily breakable portion that approaches the main body 8 from the front to the rear, and the right wing is formed with an easily breakable portion 22 that approaches the main body 8 from the rear to the front. may be

When the absorbent article 1 having both the first easily tearable portion 21 and the second easily tearable portion 22 as shown in FIGS. 1A, 1B, and 2 is attached to underwear and removed from the front, the wings are 1 Break at the easily breakable portion 21 . This is because the direction in which the first easily breakable portion 21 is broken (extending direction of the first easily breakable portion) is compared to the direction in which the second easily breakable portion 22 is broken (extending direction of the second easily breakable portion). , and closer to the direction in which the wings are pulled through the body 8.

In the following, the relationship between the direction in which the wing is pulled and the breaking direction of the easy-to-break portion in the action of removing the absorbent article 1 from underwear as the action progresses will be described.

FIG. 4(a) shows a state in which the absorbent article 1 is attached to underwear, that is, a state in which the first wing W1 and the second wing W2 are folded back toward the underwear and joined to the underwear, viewed from the back sheet 2 side. It is a figure and shows the figure which expanded the part of wings W1 and W2. FIG. 4(a) corresponds to the state shown in FIG.

When removing the absorbent article 1 from the state shown in FIG. 4(a), the main body of the absorbent article 1 is pulled so as to be peeled off from the underwear (FIGS. 3(a) and (b)). The absorbent article 1 is pulled in the directions indicated by arrows 51 and 52 in FIG.

Here, as shown in FIG. 4A, a direction 51 in which the first wing W1 is pulled and a direction 61 in which the first easily breakable portion 21 is broken (or the extending direction of the first easily breakable portion 21) form. The angle α1 is smaller than the angle α2 formed between the direction 52 in which the second wing W2 is pulled and the direction 62 in which the second easily breakable portion 22 is broken (or the extending direction of the second easily breakable portion 22). That is, the breaking direction 61 of the first easily breaking portion 21 is closer to the direction in which the wing is pulled than the breaking direction 52 of the second easily breaking portion 22 . In other words, the breaking direction 61 of the first easily breaking portion 21 is more parallel to the direction in which the wing is pulled than the breaking direction 52 of the second easily breaking portion 22 .

Here, when it is desired to pull and break a sheet-like body such as a wing, it is easier to break by pulling in a direction closer to the direction to be broken (the direction of the break line to be formed). Therefore, in the illustrated embodiment, when the absorbent article 1 is removed, breakage can start at the first easily breakable portion 21 extending in a direction closer to the direction in which the wing is pulled (Fig. 4(b)).

As the removal operation of the absorbent article 1 progresses from the state shown in FIG. 4(a), the direction in which the absorbent article 1 is pulled gradually shifts from the front to the rear of the absorbent article 1 (FIG. 3(b)). )). Therefore, the direction in which the wing is pulled also shifts from the front to the rear. That is, as shown in FIG. 4(b), the direction 51 in which the first wing is pulled and the direction 52 in which the second wing is pulled shift slightly rearward compared to the directions in the state shown in FIG. 4(a). and diagonally backward.

When the direction in which the wings W1 and W2 are pulled shifts rearward, the angle α1 formed between the direction 51 in which the first wing W1 is pulled and the breaking direction 61 of the first easily breaking portion 21 becomes even smaller (FIG. 4B). ). Therefore, breakage at the first easily breakable portion 21 of the first wing W1 progresses more easily.

FIG. 4(c) shows a state in which the removal operation of the absorbent article 1 has progressed and the breakage of the first easily breakable portion 21 has progressed further. The direction in which the wing is pulled is shifted further rearward, and the angle α1 between the direction 51 in which the first wing W1 is pulled and the breaking direction 61 of the first easily breaking portion 21 becomes even smaller.

FIG. 4(d) shows a state in which the removal operation of the absorbent article 1 progresses and the first easily breakable portion 21 is almost broken.

Thus, in this embodiment, the first easily tearable portion 21 is inclined with respect to the center line CL in the front-rear direction. The extending direction of the first easily breaking portion 21 (the breaking direction 61) can be less than 90°, making it easier to start breaking. In addition, as the removal operation of the absorbent article 1 progresses, the direction 51 in which the first wing W1 is pulled approaches the extending direction (fracture direction 61) of the first easily tearable portion 21, so that the first easily tearable portion 21 does not break. becomes easier to progress.

The angle (acute angle) θ formed by the first easily breakable portion 21 with respect to the center line CL in the front-rear direction can be 5 to 50°, preferably 9 to 45°, and 15 to 40°. More preferably, it is 23 to 35°. The magnitude of the angle is the same for the second easily breakable portion 22 as well. When the angle θ of the easily breakable portion is 5° or more, the direction in which the wing is pulled and the extending direction of the easily breakable portion can be made close to each other, making it easier to break the easily breakable portion. In addition, since the angle θ of the easily breakable portion is 50° or less, the distance between the position where the wing is pulled and the break start position does not become too large, and the tensile force can be easily transmitted to the easily breakable portion.

Further, in this embodiment, as shown in FIGS. 4(a) to 4(d), the angle formed between the direction 52 in which the second wing W2 is pulled and the extending direction 62 of the second easily breakable portion 22 that has not been broken. α2 does not change much even if the main body 8 of the absorbent article 1 is peeled off from the underwear. Therefore, the stress applied to the easily breakable portion can be relatively concentrated on the first easily breakable portion 21 .

In addition, when the absorbent article 1 is removed from the underwear from behind, for example, by the user holding the rear end of the absorbent article 1 and peeling it off, the second easily breaking portion 22 is broken by the same mechanism as described above. It is easy to start, and breakage at the second easily breakable portion 22 is easy to progress.

Therefore, if either the first easily tearable portion 21 or the second easily tearable portion 22 is provided, the ends to be held when removing the absorbent article 1 can be changed according to the extending direction of the easily tearable portion to the front end and the rear end. By selecting from the ends, the wings can be easily broken and the absorbent article 1 can be easily removed. However, the configuration including the first easily tearable portion 21 and the second easily tearable portion 22 as shown in the figure, when removing the absorbent article 1, whether the absorbent article 1 is peeled off from the front or the back, It is preferable because the wing can be easily broken at either easily breakable portion.

On the other hand, when the easily tearable portions of both wings are formed symmetrically with respect to the center line CL in the front-rear direction, the end of the easily tearable portion which is farther from the main body of the front end and the rear end of the absorbent article Both wings can be broken by pulling the absorbent article away from the side where the wings are.

The first easily breakable portion 21 has one end (first end) 21a at the front edge of the first wing W1, and is formed to approach the main body 8 from the first end 21a. (Figs. 1 and 2). Also, the first easily breakable portion 21 terminates at the other end (second end) 22b. Since the end of the first easily breakable portion 21 is on the edge of the first wing W1, the breakage can be started from the edge of the wing, making the breakage easier. Similarly, the second easily breakable portion 22 has a first end 22a at the rear edge of the second wing W2, and is formed to approach the main body from the first end 22a. 22b terminates.

When the easily breakable portion is formed by perforations, it is preferable that the edge is provided with a cut portion, that is, the edge is notched. As a result, the breakage at the easily breakable portion can be started with a lighter force.

In this manner, at least one end of the easily breakable portion is preferably located on the front-rear edge of the wing. Further, it is more preferable that the end of the breakable portion located on the front-back direction edge of the wing is located farther from the main body 8 in the width direction D2 than the other end.

The first end 21a of the first easily breakable portion 21 is preferably located at a distance of 10 mm or more from the main body 8 in the width direction D2, and more preferably at a distance of 20 mm or more. Since the distance between the first end 21a and the main body 8 is 10 mm or more, the first end 21a, which is the breaking start position, can be separated from the main body 8. In the vicinity of the boundary between the main body 8 and the base end of the wing, that is, in the vicinity of the position where the wing is folded back, the strength of the material tends to weaken due to folding, and stress tends to concentrate. Therefore, by separating the first end 21a from the main body 8, it is possible to prevent the edge of the wing from unintentionally starting to break.

The upper limit of the distance in the width direction D2 between the first end 21a of the first easily breakable portion 21 and the main body 8 can be appropriately set depending on the dimensions of the main body 8 and the wings, but it is preferably 35 mm or less, and is preferably 30 mm. It is more preferable that it is below. By setting the length to 35 mm or less, it is possible to prevent the force required to start breaking from becoming excessively large due to an increase in the distance between the position where the first wing W1 is pulled and the first end 21a (breaking start position).

The distance in the width direction D2 between the main body 8 and the second end 21b on the opposite side of the first end 21a of the first easily breakable portion 21 can also be appropriately set depending on the dimensions of the main body 8 and the wings, etc. However, it should be 20 mm or less. and more preferably 5 mm or less. Also, the second end 21b may be located on the boundary between the main body 8 and the wing as long as the position does not damage the main body 8 .

In the illustrated embodiment, the easily breakable portion is straight, but the positional relationship between the direction in which the wing is pulled and the direction in which the easily breakable portion extends facilitates the initiation and progress of the breakage as described above. A part or the whole of the easily breaking portion may be gently curved or may be in a wavy line shape, as long as it is designed to have the effect of becoming.

As described above, the first wing W1 is provided with the adhesive portions 41A and 41B (FIGS. 1A and 2). In the state where the wings are not folded back (FIG. 1A), the adhesive portion 41A is arranged outside the first easily tearable portion 21 in the width direction D2, and the adhesive portion 41B is arranged outside the first easily tearable portion 21 in the width direction D2. placed inside. Similarly, the second wing W2 is provided with adhesive portions 42A and 42B. When the wings are not folded back (FIG. 1A), the adhesive portion 42A is arranged outside the second easily breakable portion 22 in the width direction D2, and the adhesive portion 42B is arranged outside the second easily breakable portion 22 in the width direction D2. placed inside.

By providing the adhesive portion 41A on the outside of the first easily tearable portion 21 and/or the adhesive portion 42A on the outside of the second easily tearable portion 22, when the absorbent article 1 is worn, two The wings can be overlapped and joined together. As a result, the wings are securely fixed to each other by joining, so that there is an advantage that twisting and wrinkling at the side edges of the main body can be prevented satisfactorily. In addition, after one of the wings is broken at the easily breakable portion, the portion of the broken wing that is not connected to the main body 8 (that is, the broken piece near the end of the wing in the width direction D2) is replaced with the other can be left attached to the wing of the As a result, when the absorbent article 1 is finally removed from the underwear after the wing is broken, it is possible to remove the broken piece of the wing together with the other wing without leaving the broken piece of the wing on the underwear.

Such a wing-to-wing configuration may require a relatively large amount of force to remove the absorbent article from the undergarment. However, according to this embodiment having the easily breakable portion, the absorbent article can be easily removed even if the wings are strongly joined together.

On the other hand, since the adhesive portion on the inner side in the width direction D2 (the adhesive portion 41B on the inner side of the first easily breaking portion 21 in the width direction D2 and the adhesive portion 42B on the inner side of the second easily breaking portion 22 in the width direction D2) is provided, The wings can be fixed near the base end, and the function of preventing the body from slipping can be improved. However, since the adhesive portions 41B and 42B are the portions that are peeled off from the underwear at the initial stage in the operation of removing the absorbent article 1, the arrangement of the adhesive portions 41B and 42B is omitted from the viewpoint of ease of removal. You may

In the illustrated embodiment, two adhesive portions are provided for one wing, but the number of adhesive portions provided is not particularly limited. Further, although the shape of the adhesive portion is rectangular in plan view, it may be a quadrangle other than a rectangle, a polygon other than a quadrangle, or an arbitrary shape such as a circle or an ellipse.

Although the number, shape, and dimensions of the adhesive portion are not particularly limited as described above, the adhesive portion may be provided so as not to overlap the easily tearable portion in either the first easily tearable portion 21 or the second easily tearable portion. preferable. This can prevent the adhesive portion from interfering with tearing of the wing at the position where the breakable portion is broken.

FIG. 5 shows a modification of the embodiment of the invention. In the examples shown in FIGS. 5(a) to 5(d), the first wing W1 and the second wing W2 are folded back to the undergarment side and adhered to the undergarment by the adhesive portion. It is the figure seen from. In FIGS. 5(a)-(d), the front and rear portions of the absorbent article are omitted.

The example shown in FIG. 5(a) is designed so that the first wing W1 and the second wing W2 are not overlapped. Thus, when the first wing W1 and the second wing W2 are not overlapped, both the first wing W1 and the second wing W2 are directly joined to the underwear by the adhesive portion. In this example, after the easily tearable portion is broken, the broken pieces of the wings are left on the underwear, so if the user wants to remove the broken pieces, the user removes the broken pieces by hand.

As shown in FIG. 5A, in the example where the first wing W1 and the second wing W2 are not overlapped, the angle (acute angle) θ is preferably 15 to 45°, more preferably 20 to 40°.

Further, as in the example shown in FIG. 5B, the second end 1b (rear end) opposite to the first end 21a of the first easily breaking portion 21 is arranged on the edge of the first wing W1. can be terminated in the middle of the first wing. The position at which the first easily breakable portion 21 terminates is preferably rearward of the center of the length of the first wing W1 in the front-rear direction D1.

Furthermore, as shown in FIG. 5(c), the first easily breakable portion 21 may include a curved portion on the side of the first end 21a away from the main body 8. As shown in FIG. When the first end 21a side of the first easily breakable portion 21 is curved toward the main body 8 as in this example, the first wing W1 is pulled at the initial stage of breakage (the start of breakage). The direction and the extending direction of the first easily breakable portion 21 can be greater than 45°. Therefore, it becomes somewhat difficult to start breaking. Therefore, when the material of the wing is inherently fragile, it is possible to prevent unintended breakage during or during the mounting operation. On the other hand, if the wing material is strong against pulling and tearing, depending on the degree of curvature of the end of the first easily breaking portion 21, the portion near the first end 21a of the first easily breaking portion 21 is It can also be made weaker to make it easier to initiate rupture.

In the example shown in FIG. 5( d ), the first easily breaking portion 21 is formed by perforations, but a part thereof is formed by a plurality of, more specifically, two perforations (two perforations) provided side by side. including heavy perforations). By partially including a plurality of perforations in this way, the first easily breakable portion 21 can be broken more easily. The distance between perforations can be 0.2-4 mm.

Also, in the illustrated embodiment, the two perforations are formed in the portion on the first end 21a side. As a result, since the first end 21a side of the first easily breakable portion 21 can be broken more easily, breaking can be started with a light force. It should be noted that the entire first easily breaking portion 21 can be formed from two perforations or three or more perforations.

In the above description, reference was made to the first easily breakable portion 21 in the examples shown in FIGS. 5(b) to 5(d). The portion 22 may also be formed in the same manner as the first easily breakable portion 21 . Alternatively, only the second easily breakable portion 22 may be formed in the same manner as the first easily breakable portion 21 .

As described above, the configurations described in this specification, particularly the configurations of the easily breakable portions provided on the pair of wings, can be combined arbitrarily. For example, an absorbent article can be configured by combining the first easily tearable portion shown in FIG. 1 and the second easily tearable portion shown in FIG. It is also possible to combine the features shown in a) with the features shown in FIG. 5(d).

1 Absorbent Article 2 Back Sheet 3 Top Sheet 4 Absorber 7 Side Nonwoven Fabric 8 Main Body (Absorbent Article Main Body)
21 First easily breakable portion 21a First end 21b of first easily breakable portion Second end 22 of first easily breakable portion 22 Second easily breakable portion 22a First end 22b of second easily breakable portion Two ends 41A, 41B, 42A, 42B Adhesive portion 51 Direction 52 in which first wing W1 is pulled Direction 61 in which second wing W2 is pulled 61 Breaking direction of first easily breakable portion 62 Breaking direction CL of second easily breakable portion Longitudinal direction Center line F Front region M Central region R Rear region D1 First direction (longitudinal direction)
D2 Second direction (width direction)
W1 1st wing W2 2nd wing

Claims (6)

An absorbent article comprising a main body having a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body provided between the topsheet and the backsheet,
The main body has a predetermined length in the front-rear direction and a predetermined width in the width direction orthogonal to the front-rear direction,
a pair of wings extending laterally outwardly of the body;
At least one of the wings is provided with an easily breakable portion extending at an angle with respect to the center line extending in the front-rear direction ,
The easily breakable portion includes a first easily breakable portion that is provided on one of the wings and includes a linear portion that approaches the main body from the front to the rear, and a first easily breakable portion that is provided on the other side of the wing and is provided on the other side of the wing and extends from the rear to the front. and a second easily breakable portion including a wire portion approaching the main body,
Said 1st easy-to-break part and said 2nd easy-to-break part are not line-symmetrical with respect to said centerline , The absorbent article. 2. The absorbent article according to claim 1, wherein the easily tearable portion includes a line forming an angle of 5-50° with respect to the center line. 3. The absorbent article according to claim 1, wherein said easily tearable portion has a first end positioned at an edge in the front-rear direction of said wing, and extends from said first end so as to approach said main body. . 4. The absorbent article according to claim 3, wherein said first end is located at a widthwise distance of 10 mm or more from said main body. 5. The absorbent according to any one of claims 1 to 4, wherein the wings overlap each other when attached and can be joined to each other via an adhesive portion provided on the outer side in the width direction of the breakable portion. sexual goods. 5. One of said wings has a first easy-to-break portion having said first end forward, and the other of said wings has a second easy-to-break portion having said first end rearward. Absorbent article according to.

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