JP2008125960A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article having wing parts with superior fitting property, easily peeling the wing parts from cover sheets and having the wing parts with high folding-back operability in the absorbent article whose wing parts are formed of side sheets forming side leakage-preventing parts. <P>SOLUTION: This absorbent article is provided with an absorbent body 10, the wing parts 5 and 5 extending from the both side parts of the absorbent article 10 in the width direction, and the side leakage-preventing parts 6 and 6 covering the both sides of the surface of the absorbent body 10 to be in contact with the skin, wherein each of the wing parts 5 and 5 is formed of a wing upper layer 51 and a wing lower layer 52, each side leakage-preventing part 6 is formed of a water-repellent side sheet 61, the side sheets 61 are extended from the both sides of the absorbent body 10 to form the wing upper layers 51, and a back face sheet 3 is extended from the both sides of the absorbent body 10 to form the wing lower layers 52. The wing part 5 is so formed that a wing base end part 53, or the base end part, is formed of a laminated body of the wing upper layer 51 and the wing lower layer 42, and a wing tip part 54, or a part other than the wing base end part 53, is formed of the wing upper layer 51. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an absorbent article such as a sanitary napkin, a panty liner (cage sheet), and an incontinence pad.

  The absorbent article such as a sanitary napkin has a pair of wings extending outward in the width direction from both side portions of the absorbent main body having a top sheet, a back sheet, and an absorbent body interposed between both sheets. There is something that provided. In an absorbent article provided with such a wing portion, the absorbent main body is disposed on the upper surface (inner surface) of the crotch portion of the shorts, the wing portion is folded back to the lower surface (outer surface) side of the crotch portion, and the wing portion is The displacement of the absorbent article can be prevented by fixing to the crotch portion with a displacement stopper provided thereon.

  Also, in the absorbent article, in order to improve the ability to prevent side leakage from both sides of the absorbent main body, a pair of side leak-proofing portions are provided to cover both side portions on the skin contact surface side of the absorbent main body. There is something. When providing a wing portion together with an absorbent article provided with such a side leakage preventing portion, for example, the width of the absorbent main body is set to the side sheet forming the side leakage preventing portion and the back sheet of the absorbent main body, respectively. A configuration is adopted in which a wing portion is formed from the laminated body of the extension regions of both sheets by extending outward in the direction.

On the other hand, the wing part formed from the laminated body of the extension region of the side sheet and the back sheet has, for example, high rigidity and inferior fit to the body, and the touch (softness) due to the presence of the back sheet. Has the disadvantage of being inferior.
In order to solve such a defect, an absorbent article (a sanitary napkin) in which a wing portion is formed from a single layer in an extension region of a side sheet has been developed (see Patent Document 1 below). According to the absorbent article described in Patent Document 1, the above-described drawbacks such as poor fit of the wing part to the body, touch (softness) of the wing part, and the like are eliminated.

JP 2002-272786 A

  However, according to the absorbent article described in Patent Document 1, since the wing part is composed of a single layer of a side sheet, the wing part is easily stretched, and when the absorbent article in an individually packaged state is taken out from the packaging material, It is difficult to peel off the wing portion from the covering sheet that covers the provided slip stopper. Moreover, since the rigidity (rigidity) of the wing portion is low, the operability of folding back the wing portion is low when the wing portion is mounted. Furthermore, when the absorbent article is peeled off from the shorts and discarded after use, the strength near the folded portion of the wing portion is low, so the wing portion is broken near the base end portion, and a part of the wing portion is May remain attached to shorts.

  Accordingly, an object of the present invention is to provide an absorbent article having a wing portion and a side leak-proof portion, wherein the wing portion is formed from a side sheet that forms the side leak-proof portion. Provided is an absorptive article that has an excellent touch and that is easy to peel off the wing portion from the covering sheet that covers the slip-preventing agent, has a high operability of folding back the wing portion, and the wing portion does not easily break in the vicinity of the base end portion. There is.

  The present invention includes a topsheet, a backsheet, and an absorbent main body including an absorbent body disposed between both sheets, and a pair of wing portions extending outward in the width direction from both side portions of the absorbent main body. And an absorbent article having a pair of side leakage preventing parts covering both side portions of the absorbent main body on the skin contact surface side, wherein the wing part comprises a wing upper layer and a wing lower layer, The part is composed of a water-repellent side sheet, the side sheet extends from both side parts of the absorbent main body to form the wing upper layer, and the back sheet is formed from both side parts of the absorbent main body. The wing lower layer is formed by extending each of the wings. The wing base end portion, which is the base end of the wing portion, is a laminate of the wing upper layer and the wing lower layer, and the wing Wing tip is a portion other than the end portions, by providing an absorbent article comprising the wing upper layer is obtained by achieving the above object.

  According to the absorbent article of the present invention, the fit of the wing part to the body and the touch are excellent, and the wing part can be easily peeled off from the covering sheet covering the slip stopper. Further, the wing portion has a high folding operability, and the wing portion hardly breaks in the vicinity of the base end portion.

Hereinafter, the absorbent article of the present invention will be described based on a preferred embodiment (first embodiment) with reference to the drawings.
The absorbent article of 1st Embodiment of this invention is the sanitary napkin 1, and as shown in FIGS. 1-4, the absorption sheet interposed between the surface sheet 2, the back sheet 3, and both the sheets 2 and 3 is arranged. An absorbent main body 10 provided with a body 4, a pair of wing portions 5, 5 and a pair of rear flaps 7, 7 extending outward in the width direction from both side portions of the absorbent main body 10, It has a pair of side leak-proofing parts 6 and 6 covering both side parts on the skin contact surface side.

In addition, in this specification, the "skin contact surface side" is the side (surface) arranged on the skin side of the wearer when worn, out of the front and back sides (surfaces) of each member such as the absorbent main body. . Further, the “non-skin contact surface side” is a side (surface) disposed on the opposite side to the wearer's skin side when worn. Unless otherwise specified, the “longitudinal direction” is a direction along the longitudinal direction of the absorbent article, and the “width direction” is a direction along the width direction of the absorbent article.
Moreover, in the absorptive main body 10, as shown in FIG. 1, the excretion part opposing part A is an area | region which opposes a wearer's excretion part, and in the absorbent article which has the wing part 5 like this invention. , A portion having wings 5 on both sides. An area located in front of the excretory part facing part A is referred to as a front part B, and an area located in the rear of the excretion part facing part A is referred to as a rear part C.

The sanitary napkin 1 of this embodiment will be described in further detail. As shown in FIGS. 1 to 4, the absorbent main body 10 includes a liquid-permeable top sheet 2, a liquid-impermeable or water-repellent back sheet 3, and a liquid retaining property disposed between both sheets 2 and 3. The absorber 4 is provided. The absorber 4 has a substantially rectangular shape with rounded front and rear edges in plan view.
As shown in FIGS. 1, 3, and 4, the top sheet 2 covers the entire upper surface of the absorber 4. The front and rear edges of the topsheet 2 are rounded and extend from the front and rear edges of the absorber 4 in the longitudinal direction. As shown in FIGS. 3 and 4, both side edges of the top sheet 2 are linear along the longitudinal direction and slightly extend in the width direction from each side edge of the absorbent body 4. It is separated from.

As shown in FIGS. 2 to 4, the back sheet 3 covers the entire area of the lower surface of the absorber 4. The front and rear edges of the back sheet 3 are rounded and extend from the front and rear edges of the absorber 4 in the longitudinal direction. Both side edges of the back sheet 3 extend in the width direction from both side edges of the absorber 4.
As shown in FIGS. 2 to 4, in detail, on the non-skin contact surface side of the absorbent main body 10, the absorbent body 10 and the crotch portion of the shorts are provided on the non-skin contact surface side of the back sheet 3. A slip stopper 11 for fixing the upper surface (inner surface) is provided. The slip stopper 11 is formed of an adhesive or the like (the same applies to slip stoppers 55 and 75 described later).

  As the top sheet 2, the back sheet 3, and the absorbent body 4, various materials conventionally used in absorbent articles such as sanitary napkins can be used without particular limitation. For example, as the surface sheet 2, a liquid permeable nonwoven fabric or an apertured film can be used. As the back sheet 3, a liquid-impermeable or water-repellent film or the like can be used. As the absorbent body 4, an absorbent core mainly composed of a fiber aggregate such as a pulp fiber, a short fiber, or a long fiber web, which has been conventionally used, and coated with a covering sheet can be used. The absorbent core may include a superabsorbent polymer.

From the viewpoint of reducing the swelling of the absorbent main body 10, the back sheet 3 preferably has moisture permeability (breathability). As the moisture-permeable sheet, for example, a thermoplastic resin added with an inorganic compound or organic compound filler is melt-extruded from a T die or a circular die to form a film, and then the film is uniaxially stretched or biaxially A resin sheet obtained by stretching, a composite nonwoven fabric (for example, SM, SMS, SMMS, etc.) in which a spunbond nonwoven fabric (S) and a melt blown nonwoven fabric (M) are combined, an air-through nonwoven fabric, a composite nonwoven fabric such as SMS, and the resin A composite sheet with a sheet is mentioned.
When the resin sheet is used as the back sheet 3, it is preferable from the viewpoint of good fixability of the slip stopper 11 provided on the non-skin contact surface side of the back sheet 3, and when the composite nonwoven fabric is used, moisture permeability and flexibility are obtained. It is preferable because of its good properties.

  As shown in FIG. 3, the absorber 4 has a two-layer structure including an upper absorber 41 and a lower absorber 42. The upper absorbent body 41 is shorter in length and width than the lower absorbent body 42 in plan view, and has a shape smaller than the center first seal line 12 described later. Not joined. Further, the upper absorbent body 41 is located closer to the center in the longitudinal direction and the width direction of the lower absorbent body 42, and further, is located closer to the center in the longitudinal direction and the width direction of the absorbent main body 10. Accordingly, the upper absorbent body 41 forms a so-called middle-high region in the absorbent main body 10.

As shown in FIGS. 1, 3, and 4, the top sheet 2 is formed by integrally compacting the top sheet 2 and the lower absorbent body 42, and the center first seal line 12 and the center second seal. A line 13 is provided. The central first seal line 12 is provided in an annular shape in a region not covered by the side leakage preventing portion 6 on the upper surface of the topsheet 2 so as to surround the upper absorbent layer 41 in plan view. The pair of front and rear central second seal lines 13 and 13 have a substantially semicircular arc shape, and are continuous with the central first seal line 12 on the front side and the rear side from the front and rear parts of the central first seal line 12, respectively. Is provided.
The center first seal line 12 and the center second seal line 13 join the top sheet 2 and the lower absorbent body 42, but do not join the top sheet 2 and the upper absorbent body 41. Therefore, the upper absorbent body 41 is enclosed in a closed space composed of the top sheet 2 and the lower absorbent body 42.

As shown in FIGS. 1 and 3, the wing portion 5 extends from both side portions of the absorbent main body 10 in the excretory portion facing portion A, and includes a wing upper layer 51 and a wing lower layer 52. The wing portion 5 is used by being folded back to the lower surface (outer surface) side of the crotch portion of underwear such as shorts.
The wing portion 5 has a wing base end portion 53 which is a base end portion thereof formed of a laminate of a wing upper layer 51 and a wing lower layer 52, and a wing tip end portion 54 which is a portion other than the wing base end portion 53 is a wing upper layer. It consists of only 51. As shown in FIG. 1, the wing part 5 has a substantially trapezoidal shape in which a lower base (side longer than the upper base) is located on the side of the absorbent main body 10 in a plan view.

As shown in FIGS. 2 and 3, in detail, on the non-skin contact surface side of the wing portion 5, a slip stopper 55 is provided in the wing lower layer 52. The wing portion 5 folded back to the lower surface (outer surface) side of the crotch portion of the shorts can be fixed to the crotch portion by the slip stopper 55 when used.
The length along the width direction of the absorbent article of the wing base end portion 53 is preferably 2 to 30 mm, and more preferably 3 to 15 mm. However, the wing base end portion 53 is positioned more inward in the width direction of the absorbent article than the slip stopper 55. When the length of the wing base end portion 53 along the width direction of the absorbent article is not constant along the longitudinal direction of the absorbent article, the longest length is taken as the length of the wing base end portion 53.

As shown in FIGS. 1 and 4, the rear flap 7 extends from both sides of the absorbent main body 10 in the rear portion C, and includes a flap upper layer 71 and a flap lower layer 72. The rear flap 7 is used by being attached to an underwear such as shorts without being folded back in a state of extending from the absorbent main body 10. However, the rear flap 7 may be folded back to the skin contact surface side or the non-skin contact surface side of the absorbent main body 10 in order to make it compact in an individual packaging form or the like.
The rear flap 7 has a flap base end portion 73 as a base end portion made of a laminate of a flap upper layer 71 and a flap lower layer 72, and a flap front end portion 74 other than the flap base end portion 73 has a flap upper layer. It consists of 71 only. As shown in FIG. 1, the rear flap 7 has a shape curved convexly outward in the width direction in plan view.

As shown in FIG. 2 and FIG. 4, a slip stopper 75 is provided on the flap lower layer 72 in detail on the non-skin contact surface side of the rear flap 7. The slip stopper 75 allows the rear flap 7 to be fastened to the shorts during use.
The flap base end portion 73 preferably has a length along the width direction of the absorbent article of 2 to 30 mm, and more preferably 3 to 15 mm. However, the flap base end portion 73 is positioned more inward in the width direction of the absorbent article than the slip stopper 75. When the length of the flap base end portion 73 along the width direction of the absorbent article is not constant along the longitudinal direction of the absorbent article, the longest length is taken as the length of the flap base end portion 73.

  As shown in FIGS. 1, 3, and 4, the side leak-proof portion 6 is a component that covers both side portions on the skin contact surface side of the absorbent main body 10, and the skin contact surface of the absorbent main body 10. It is provided so that it may extend over the substantially full length along the longitudinal direction of the absorptive main body 10 at each of the both sides in the side.

  The side leak-proof portion 6 includes a water-repellent side sheet 61. The side sheet 61 is folded in the width direction to form a folded portion at the inner edge of the side leakage preventing portion 6 to form a two-layer region. In this embodiment, 80% or more of the planar view area of the side leak-proof portion 6 is a two-layer region. The inner edge portion of the side leak-proof portion 6 is linear along the longitudinal direction of the absorbent main body 10. If comprised in this way, the inner edge part side in the side leak-proof part 6 will open easily as a pocket in the width direction inner side of the absorptive main body 10 at the time of mounting | wearing.

  As the water-repellent side sheet 61, various water-repellent materials conventionally used in absorbent articles such as sanitary napkins can be used without particular limitation, and it is more preferable that the material has moisture permeability. The side sheet 61 may be liquid impermeable. As a material of the site sheet 61, for example, a spunbond nonwoven fabric, a sheet in which the spunbond nonwoven fabric (S) and the melt blown nonwoven fabric (M) are combined (for example, SM, SMS, SMMS, etc.), heat roll nonwoven fabric, air-through nonwoven fabric, etc. Water-repellent (hydrophobic) non-woven fabric. When a composite sheet such as SM, SMS, or SMMS is used, the smooth feel of the surface of the sheet and the physical properties (strength, etc.) of the sheet are good. This is preferable in that the transferability of the slip stopper 55 is good. Moreover, when the nonwoven fabric made by the air through method is used, thickness is easy to be obtained even at a low basis weight, which is preferable in terms of feeling (cushion feeling) and touch.

  As the side sheet 61, an embossed sheet in which a large number of embossed concave portions having no corners such as a substantially circular shape, an elliptical shape, and a rounded corner shape are sporadically formed on the nonwoven fabric is preferable. By forming the embossed recesses, the contact area with the skin can be reduced, and by forming the embossed recesses without corners, the fluff of the nonwoven fabric (mainly due to fiber breakage) can be prevented and the touch can be improved. is there.

The side sheets 61 respectively extend from both sides of the absorbent main body 10 to form a wing upper layer 51 and a flap upper layer 71. Further, the back sheet 3 extends from both sides of the absorbent main body 10 to form a wing lower layer 52 and a flap lower layer 72.
In this way, the wing portion 5 and the rear flap 7 are different in the position (excretion portion facing portion A / rear portion C), the usage method (used by folding / using without folding), and the like. However, the basic configuration (particularly the configuration in the thickness direction) itself is the same. Therefore, the description about the wing part 5 mentioned above or below is also applied to the rear flap 7 as appropriate.

As shown in FIGS. 1 and 2, the side leak-proof portion 6 is a front sheet B or a back sheet of the absorbent main body 10 at the front end B on the front end side and the outer edge side by a front seal line 84. 3 is joined. The front seal line 84 is formed by, for example, heat sealing, ultrasonic sealing, or high frequency sealing. Note that seal lines 81, 82 and 83, which will be described later, are formed in the same manner.
Moreover, as shown in FIGS. 1-5, as for the side leak-proof part 6, in the excretion part opposing part A, the outer edge part side is joined to the back surface sheet 3 of the absorptive main body 10 by the excretion part opposing part seal line 81. Has been. The excretion part facing part seal line 81 is provided so as to be convexly curved inward in the width direction continuously from one base of the wing part 5 to the other base. The base of the wing part 5 is located at the front end part and the rear end part of the boundary line (details will be described later) between the absorbent main body 10 and the wing part 5.
Further, as shown in FIGS. 1 and 2, the side leakage preventing portion 6 has a rear portion C on the outer edge side and the rear end portion thereof on the back sheet 3 of the absorbent main body 10 by a rear seal line 83. Or it is joined to the surface sheet 2. The rear seal line 83 is provided on the front end portion side and the rear end portion side of the side leak-proof portion 6 located in the rear portion C so as to be separated in the longitudinal direction.

  As shown in FIG. 1, the surface sheet 2 has an area overlapping with the side leakage preventing part 6 in a plan view, and the side leakage preventing part 6 is provided by the seal lines 84, 81 and 83 provided on the side leakage preventing part 6. It is joined to the back sheet 3 of the absorptive main body 10 via. Further, the top sheet 2 is joined to the back sheet 3 of the absorbent main body 10 by the front seal line 84 and the rear seal line 83 even in a region where the top sheet 2 does not overlap the side leakage preventing part 6 in plan view. The front seal line 84 continuously extends in a substantially semicircular arc shape from the left side edge of the front part B of the absorbent main body 10 to the right side edge via the front end edge. The rear seal line 83 extends continuously to the rear edge of the rear part C of the absorbent main body 10.

  In the wing part 5, as shown in FIGS. 1 to 5, the wing upper layer 51 and the wing lower layer 52 are joined by a wing base end seal line 82. The wing base end seal line 82 is spaced apart in the longitudinal direction only on the front end side and the rear end side of the wing base end portion 53.

  In the rear flap 7, the flap upper layer 71 and the flap lower layer 72 are joined by a rear seal line 83 that extends from the front end side and the rear end side of the side leak-proof portion 6. The rear seal line 83 is provided on the front end side and the rear end side of the flap base end portion 73 so as to be separated in the longitudinal direction.

  Next, the folding line of the wing part 5 will be described. In the present embodiment, a fold line (see FIG. 6) formed when the wing part 5 is folded back to the back sheet 3 side of the absorbent main body 10 is a boundary line between the absorbent main body 10 and the wing part 5. . In the present embodiment, a folding guide wire that is curved inward in the width direction is provided on the outer side in the width direction of the absorbent body 4, and the wing portion 5 is folded back to the back sheet 3 side of the absorbent main body 10. Sometimes, the fold line is curved along the fold guide line. The folding guide line in the present embodiment is the excretion part facing part seal line 81, and therefore the folding line is also the excretion part facing part seal line 81.

On the other hand, in the present invention, when the wrapping line is not clearly formed when the wing part 5 is folded back to the back sheet 3 side of the absorbent main body 10, the straight line connecting the bases of the wing part 5 is the absorbent main body 10. And a boundary line between the wing portion 5 and the wing portion 5.
The boundary line between the absorbent main body 10 and the rear flap 7 is directed from the position closest to the rear portion C of the boundary line between the absorbent main body 10 and the wing part 5 toward the rear end of the absorbent main body 10 along the longitudinal direction. It is a straight line that extends.

As shown in FIG. 1, each of the pair of side leakage prevention parts 6 is provided with a side leakage prevention part seal line 62 including a side leakage prevention part first seal line 63 and a side leakage prevention part second seal line 64. Yes. The side leak-proof portion first seal line 63 is provided in the excretory portion facing portion A, and is curved to protrude outward in the width direction and extends in the longitudinal direction. The length of the side leakage preventing portion first seal line 63 is substantially the same as the length of the wing base end portion 53 along the longitudinal direction of the absorbent main body 10. The side leak-proof portion second seal line 64 is provided separately from each of the front portion B and the rear portion C, and has a zigzag shape along the longitudinal direction.
The side leak-proof portion first seal line 63 is adjacent to the inner side in the width direction of the excretory portion-facing portion seal line 81 that is a folding guide wire, and joins the side leak-proof portion 6 to the topsheet 2.

The side leak-proof portion first seal line 63 and the side leak-proof portion second seal line 64 are the side leak-proof portion second seal line 64, the side leak-proof portion first seal line 63, and the side leak-proof portion second seal line 64. In this order, it continues from the front part B to the rear part C via the excretory part facing part A. The side leak-proof portion 6 is joined to the upper surface of the top sheet 2 of the absorbent main body 10 by the side leak-proof portion seal wire 62.
In addition, the side leak-proof part seal line 62 can be provided so that the side leak-proof part 6 may be fixed to the absorber 4 together with the top sheet 2, and the side leak-proof part 6 can be provided without the top sheet 2 interposed. Can be provided directly to the absorbent body 4.

  The region between the inner edge of the side leak-proof portion 6 and the side leak-proof portion seal line 62 is not joined to the top sheet 2 and forms a pocket with the top sheet 2. The pocket is opened at the time of wearing, and the body fluid that has moved outward in the width direction can be captured in the opened pocket, so that leakage resistance can be improved. Moreover, since it can understand easily that the leak-proof property of the width direction is high also visually, it is preferable also at the point which gives a wearer a sense of security.

  The side leak-proof part seal wire 62 is such that the body fluid captured in the pocket is smoothly absorbed by the absorber 4 and further improves the leak-proof property, so that all or part of it overlaps the absorber 4 in plan view. It is preferable. The body fluid captured in the pocket is absorbed by the absorber 4 while moving from the front of the pocket to the back, or after reaching the back of the pocket, is returned to the absorber 4 and absorbed.

The constituent members of the sanitary napkin 1 of the present embodiment are further joined by various adhesives (not shown) such as a hot-melt adhesive in addition to the above-described seal wires 81 to 84 and 62. The adhesive is provided mainly for the purpose of reinforcing the bonding by the seal lines 81 to 84 and 62.
The adhesive is, for example, between the wing upper layer 51 and the wing lower layer 52, between the flap upper layer 71 and the flap lower layer 72, between the absorber 4 and the back sheet 3, and between the side leakage preventing part 6 and the top sheet 2. Between. The adhesive may be applied continuously (in the form of a plane) (so-called solid coating), but it is preferable that the adhesive is applied intermittently in consideration of the air permeability of the coated area. Examples of the intermittent coating form include a spiral shape, a stripe shape extending in the width direction, an Ω shape, and a dot shape.

  In the wing part 5, the wing base end part 53 is preferably less extensible than the wing front end part 54. The difference in extensibility between the wing base end portion 53 and the wing tip end portion 54 is realized by, for example, joining the wing upper layer 51 and the wing lower layer 52 with an adhesive, heat seal, or the like at the wing base end portion 53. . The extensibility of the wing base end portion 53 is the extensibility evaluated as a whole, that is, a laminate of the wing upper layer 51 and the wing lower layer 52. The level of extensibility of the wing base end portion 53 and the wing front end portion 54 is evaluated based on the size of the extension rate. The elongation rate of the wing base end portion 53 and the wing front end portion 54 is measured by the following measuring method.

[Measurement method of elongation rate]
The wing base end portion 53 and the wing tip end portion 54 are cut into a length of 30 mm or more and a width of 10 mm to obtain samples. Using a Tensilon tensile tester (manufactured by A & D Co., Ltd., RTC-1210A), hold the sample with 20 mm between the chucks, pull the sample with a load of 100 cN / 10 width in the length direction, and the sample after elongation Assuming that the length of A is A, the elongation rate at that time is defined as follows.
(A / 20) × 100.
That is, the elongation rate (%) is (length of sample after elongation) / (length of sample before elongation) × 100. For example, if the length of the sample after extension is 30 mm, the extension rate is 150%, and if the length of the sample after extension is 40 mm, the extension rate is 200%.

  The thickness of the absorbent main body 10 is preferably 5 mm or less, more preferably 3.5 mm or less in the excretory part facing part A. Moreover, the thickness of the absorptive main body 10 is preferably 3 mm or less, more preferably 2 mm or less in the front part B and the rear part C. When the thickness of the absorbent main body 10 is set in such a range, it is difficult to cause a sense of incongruity at the time of wearing, it fits further along the front-rear direction of the body, and the pocket is easy to open at the time of wearing, preventing lateral leakage. Since it improves further, it is preferable.

The thickness of the absorbent main body 10 is measured by the following measuring method.
[Measurement method of thickness]
Place the product (the entire absorbent article) on a flat place so that there are no wrinkles or bends, and on the upper surface of the area where the absorbent body is disposed in the excretory part facing part or front part or rear part of the absorbent main body, A load of 5 cN / cm ² is applied and the thickness under that condition is measured. Wear pressure when wearing the product varies depending on the body part, individual differences, state (sitting / moving), etc., but wear clothing such as shorts in the central area (near the excretion point) opposite the excretion part In the state where no external pressure is applied other than that, no load is applied to a load of 5 cN / cm ² , so measurement was performed at this load (5 cN / cm ² ). A thickness meter PEACOCK DIAL PRIGHT GAUGES R5-C (manufactured by OZAKI MFG.CO.LTD.) Was used for measuring the thickness. At this time, a plate (an acrylic plate having a thickness of about 5 mm) is disposed at the measurement portion between the tip of the thickness meter and the product, and the size of the plate is adjusted so that the load is 5 cN / cm ² . The shape of the plate is circular or square.

  Moreover, it is preferable that the tear strength at the base of the wing part 5 is 500 to 1000 cN, and even if the slip stopper 55 of the wing part 5 is peeled off from the crotch part of the shorts after use, the tear starts from the root of the wing part 5 Is more preferably 650 cN or more in order to make it more certain that the occurrence of the above is difficult.

The tear strength of the wing part 5 is measured by the following measuring method.
[Measurement method of tear strength]
Using Tensilon tensile testing machine (RTC-1210A, manufactured by A & D Co., Ltd.) with reference to Method A (trouser tear method) defined in JIS K7128 (Plastic-Film and Sheet Tear Strength Test Method) The upper and lower chucks are adjusted to a distance of 5 mm (interval that allows the test piece to be inserted), and the product absorbent main body is placed on the upper side of the chuck and the wing is sandwiched on the lower side. The sex body is raised at a constant speed of 200 mm / min, and the maximum value (cN) when the test piece is torn along the product longitudinal direction is read. The measurement was performed 5 times, and the average value was calculated as the tear strength.

In addition, the test piece is in the product form so that it is 75 mm in front and back (total 150 mm: the length at which the base part of the wing part remains reliably) with reference to the center of the longitudinal wing part in the absorbent article in the product form. The absorbent article was cut in the width direction to form a sample. Further, a cut was made in the longitudinal direction at a length of 15 mm from the base portion of the wing portion, and this was used as a test piece.
The upper part of the Tensilon tensile tester is sandwiched with the absorbent main body part of the obtained test piece (the wing part is not sandwiched), and the lower part of the wing part is folded back by cutting into the lower chuck. Was measured.

  In the sanitary napkin 1 according to the present embodiment, the absorbent main body 10 is disposed on the upper surface (inner surface) of a crotch portion (not shown) of shorts, and is fixed to the crotch portion by a slip stopper 11. Further, the rear flap 7 is disposed on the upper surface (inner surface) of the shorts, and is fixed to the shorts by the slip stopper 75. Then, as shown in FIG. 6, the wing portion 5 is folded back to the lower surface (outer surface) side of the crotch portion, and the wing portion 5 is fixed to the outer surface of the crotch portion by the displacement stopper 55, thereby preventing positional displacement. Can be worn while.

In the sanitary napkin 1 of the first embodiment having the above-described configuration, the wing base end portion 53 is composed of a laminated body of the wing upper layer 51 and the wing lower layer 52, and the wing distal end portion 54 is composed of only the wing upper layer 51. Therefore, not only the wing part 5 has excellent fit and feel to the body, but the wing part 5 is not easily stretched, and is provided in the wing part 5 when the sanitary napkin 1 in the individually packaged state is taken out from the packaging material. It is easy to peel off the wing part 5 from a covering sheet (not shown) that covers the slip stopper 55.
Moreover, since the rear flap 7 has the same configuration as the wing portion 5, the same effect can be obtained.

  In addition, since the rigidity (rigidity) of the wing part 5 is high, the operability of turning the wing part 5 is high when the wing part 5 is attached to the shorts. Furthermore, since the strength in the vicinity of the folded portion of the wing portion 5 is high, when the sanitary napkin 1 is peeled off from the shorts and discarded after use, the wing portion 5 does not break in the vicinity of the wing base end portion 53, and the wing portion Part of 5 is less likely to remain attached to the shorts.

In addition, since the wing base end portion 53 is difficult to see through, the shorts are hardly seen through in the vicinity of the folded portion of the wing portion 5 when attached to the shorts, and the visual leakage prevention effect of the wing portion 5 is high.
Since the wing base end portion 53 is less extensible than the wing tip end portion 54, the above-described rupture prevention effect of the wing portion 5 is improved.

  Moreover, the excretion part opposing part seal line 81 is provided as the folding | turning induction | guidance | derivation line | wire curved convexly in the width direction inward in the width direction of the absorber 4, and the back sheet | seat of the absorptive main body 10 is used for the wing part 5. When folded back to the 3rd side, the folding line of the wing part 5 is formed to bend along the folding guidance line (excretion part facing part seal line 81). Accordingly, the wing portion 5 is folded back along the side edge shape of the crotch portion of the shorts (usually recessed toward the inner side in the width direction), so that the sanitary napkin 1 can be stably attached to the shorts. High nature.

  Further, the side leak-proof portion 6 is adjacent to the inner side in the width direction of the folding guide wire (excretion portion facing portion seal line 81), and the side leak-proof portion seal that joins the side leak-proof portion 6 to the top sheet 2. A line 62 (side leakage preventing portion first seal line 63) is provided. Therefore, the rigidity of the inner region in the width direction of the folding guide line is increased, and the folding line is clearly formed. As a result, the folding operability of the wing portion 5 is improved.

  When the sanitary napkin 1 is attached to the shorts, the wing portion 5 is folded back to the back sheet 3 side of the absorbent main body 10, whereas the rear flap 7 is not folded back, so the root of the wing portion 5 and the rear flap 7 Between the bases of the sanitary napkin 1 (where both bases are present at almost the same position in the present embodiment) is the place where the twist is most likely to occur. Thus, in the present embodiment, the wing base end portion 53 and the flap base end portion 73 are made of a laminated body of the side sheet 61 and the back sheet 3 and have high rigidity. Therefore, the root of the wing portion 5 and the rear flap 7 It is difficult for the twist between the base of the to occur.

  The wing tip portion 54 and the flap tip portion 74 are formed from the side sheet 61 made of the embossed sheet, and the aggregated state of the nonwoven fabric fibers is dense as a whole. Therefore, the wing tip portion 54 and the slip stopper 55 are joined together. And the bonding property between the flap tip 74 and the slip stopper 75 is excellent. Moreover, in the flap front-end | tip part 74, the spread to the width direction does not arise easily by an embossing recessed part.

  Next, another embodiment of the present invention will be described. In the other embodiments, differences from the first embodiment described above will be mainly described, and the same points are denoted by the same reference numerals and description thereof will be omitted. For the points that are not particularly described, the description of the first embodiment is applied as appropriate.

  FIG. 7 shows the wing portion 5 and the excretory portion facing portion A in the vicinity thereof in the sanitary napkin of the second embodiment of the absorbent article of the present invention. The sanitary napkin 1 according to the second embodiment is different from the sanitary napkin 1 according to the first embodiment in the shape of the excretory part-facing portion seal line 81 that is a folding guide line. Specifically, the excretion part-facing part seal line 81 is a curved continuous line in the first embodiment, whereas in the second embodiment, it is a curved broken line (including a dot line). It is. The excretion part opposing part seal line 81 extends over both bases of the wing part 5 macroscopically.

  According to the curved broken line excretion part facing part seal line 81 (folding guide line), a curved folded line can be formed in the same manner as the curved continuous line excretion part facing part seal line 81 in the first embodiment. Therefore, the sanitary napkin 1 of the second embodiment can achieve the same effects as the sanitary napkin 1 of the first embodiment. Moreover, by making the excretion part opposing part seal line 81 into the shape of a broken line, it becomes possible to reduce the rigidity of the seal line 81 and to further improve the feeling of use.

  FIG. 8 shows the wing part 5 and the excretory part opposing part A in the vicinity thereof in the sanitary napkin of the third embodiment of the absorbent article of the present invention. The sanitary napkin 1 of the third embodiment is different from the sanitary napkin 1 of the second embodiment in the shape of the excretory part-facing portion seal line 81 that is a folding guide line. Specifically, the excretory part-facing part seal line 81 extends macroscopically in the second embodiment over both roots of the wing part 5, whereas in the third embodiment, the wing. It is provided only in the vicinity of both bases of the part 5 and is not provided between them.

Even with such a configuration, a folding line is formed in a curved shape convex inward in the width direction indicated by a two-dot chain line in FIG. 8 by the excretion part facing part seal line 81 provided in the vicinity of the both bases of the wing part 5. Is done. Therefore, the excretion part facing part seal line 81 is also a folding guide line.
According to the folding guide line composed of the excretion part facing part seal line 81 provided only in the vicinity of the both roots of the wing part 5, the excretion part facing part seal line 81 extending over the both roots of the wing part 5 in the second embodiment and Similarly, since a curved fold line can be formed, the sanitary napkin 1 of the third embodiment can achieve the same effects as the sanitary napkin 1 of the second embodiment. Further, by providing the seal wire 81 only in the vicinity of both bases of the wing portion 5, the flexibility of the folded portion of the wing portion 5 when it is caught in shorts is maintained, and it becomes difficult to wrinkle, so the feeling of use is impaired. There is nothing.

  FIG. 9 shows the wing portion 5 and the excretory portion facing portion A in the vicinity thereof in the sanitary napkin of the fourth embodiment of the absorbent article of the present invention. The sanitary napkin 1 according to the fourth embodiment is different from the sanitary napkin 1 according to the first embodiment in the shape of the excretory part-facing portion seal line 81 that is a folding guide line. Specifically, in the first embodiment, the curved continuous linear excretory part-facing part seal line 81 is positioned at both bases of the wing part 5 in the first embodiment. In FIG. 2, the both end portions are located at positions shifted inward in the longitudinal direction from both roots of the wing portion 5.

Even with such a configuration, a part of the folding line is formed along the excretion part facing part seal line 81 and a line connecting the root of the wing part 5 and the end part of the excretion part facing part seal line 81 (FIG. 9, the remaining part of the fold line is formed. Therefore, the excretion part facing part seal line 81 is also a folding guide line.
According to the folding guide line composed of the excretion part facing part seal line 81 separated from the both roots of the wing part 5, a folded line that is mostly curved can be formed. Therefore, even with the sanitary napkin 1 of the fourth embodiment, The same effects as those of the sanitary napkin 1 according to the embodiment are exhibited. In addition, by providing a seal line 81 that is separated from both bases of the wing part 5, wrinkles in the vicinity of the bases of the wing part 5 that are most likely to be distorted in the folded part of the wing part 5 when wound on shorts are reduced. It becomes possible, and it becomes possible to raise fit nature to shorts more.

The absorbent article of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist of the present invention.
For example, the two-layer region of the side leak-proof portion 6 is not limited to one formed by folding back one side sheet 61 in the width direction as in the above embodiment, and is formed by stacking two sheets. You can also. Moreover, the side leak-proof part 6 does not need to have a 2 layer area | region. That is, the side leak-proof portion 6 can be formed from one side sheet 61 that is not folded back.

In each of the above embodiments, the fold line and the fold guide line are curved inwardly in the width direction, but have a straight line shape (both continuous line shape and broken line shape) extending along the longitudinal direction of the absorbent article. Can also be included).
Each structure in each said embodiment can be combined suitably with other embodiment.
The absorbent article of the present invention is not limited to sanitary napkins, and can also be applied to panty liners (orimono sheets), incontinence pads, and the like. The underwear to be worn is not limited to shorts.

FIG. 1 is a plan view showing a sanitary napkin as a first embodiment of the absorbent article of the present invention. FIG. 2 is a bottom view showing the sanitary napkin shown in FIG. 3 is a cross-sectional view taken along line III-III shown in FIG. 4 is a cross-sectional view taken along line IV-IV shown in FIG. FIG. 5 is a partially enlarged plan view showing the wing portion and the excretory portion facing portion in the vicinity thereof in the sanitary napkin shown in FIG. 1. FIG. 6 is a perspective view (underwear omitted) showing a state where the sanitary napkin shown in FIG. 1 is attached. FIG. 7 is a partially enlarged plan view (corresponding to FIG. 5) showing a wing portion and an excretory portion facing portion in the vicinity thereof in a sanitary napkin as a second embodiment of the absorbent article of the present invention. FIG. 8 is a partially enlarged plan view (corresponding to FIG. 5) showing a wing portion and an excretory portion facing portion in the vicinity thereof in a sanitary napkin as a third embodiment of the absorbent article of the present invention. FIG. 9 is a partially enlarged plan view (corresponding to FIG. 5) showing a wing portion and an excretory portion facing portion in the vicinity thereof in a sanitary napkin as a fourth embodiment of the absorbent article of the present invention.

Explanation of symbols

1 Sanitary napkin (absorbent article)
DESCRIPTION OF SYMBOLS 10 Absorbent main body 11 Anti-slip agent 12 Center 1st seal line 13 Center 2nd seal line 2 Top sheet 3 Back sheet 4 Absorber 41 Upper absorber 42 Lower absorber 5 Wing part 51 Wing upper layer 52 Wing lower layer 53 Wing base end Part 54 Wing tip part 55 Anti-slip agent 6 Side leak-proof part 61 Side sheet 62 Side leak-proof part seal line 63 Side leak-proof part first seal line 64 Side leak-proof part second seal line 7 Rear flap 71 Flap upper layer 72 Flap Lower layer 73 flap base end portion 74 flap front end portion 75 slip stopper 81 excretion portion facing portion seal line (folding line, folding guide line)
82 Wing base end seal line 83 Rear seal line 84 Front seal line A Excretion part facing part B Front part C Rear part

Claims (6)

Absorbent body provided with a top sheet, a back sheet, and an absorbent body disposed between both sheets, a pair of wings extending outward in the width direction from each side of the absorbent body, and the absorbent An absorbent article having a pair of side leak-proofing portions covering both side portions on the skin contact surface side of the main body,
The wing part consists of a wing upper layer and a wing lower layer,
The side leak-proof portion is made of a water-repellent side sheet, and the side sheet extends from both side portions of the absorbent main body to form the wing upper layer,
The back sheet extends from both sides of the absorbent main body to form the wing lower layer,
The wing portion includes a laminated body of the wing upper layer and the wing lower layer, and a wing distal end portion other than the wing base end portion from the wing upper layer. Absorbent article.   The absorbent article according to claim 1, wherein the wing base end portion has lower extensibility than the wing tip end portion.   The absorptive article according to claim 1 or 2 with which said wing upper layer and said wing lower layer are joined.   The fold line formed when the wing part is folded back to the back sheet side of the absorbent main body is a boundary line between the absorbent main body and the wing part. Absorbent article. On the outer side in the width direction of the absorbent body, a folding guide line that is curved inwardly in the width direction is provided,
The absorbent article according to claim 4, wherein when the wing portion is folded back to the back sheet side of the absorbent main body, the fold line is curved along the fold guide line.   6. The side leak-proof portion is provided with a side leak-proof portion seal line that joins the side leak-proof portion to the top sheet in the vicinity of the inner side in the width direction of the folded guide wire. Absorbent articles.

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