TWI655937B - Absorbent article - Google Patents

Abstract

An object of the present invention is to provide an absorbent article which is excellent in the adhesion to the inter-turn portion of the wearer and allows the body fluid to be absorbed quickly and efficiently in the absorbent body.

The present invention relates to an absorbent article comprising a folded second sheet (3), and the aforementioned folded second sheet (3) comprises: a reference portion positioned on the top sheet (2) side; and from the aforementioned reference a region portion of at least one of the first region portion and the second region portion in which each end portion of the portion is extended, wherein the region portion has: p (p is an integer of 1 or more) mountain fold line; and q strip (q a valley fold line which is an integer of 0 or more, wherein the folded second sheet (3) is viewed in plan, and at least one of the reference portion and a portion of the mountain fold portion adjacent to the mountain fold line is in a wide direction. Extending across the central axis in the longitudinal direction of the absorbent article, extending across the central axis extending in the width direction of the absorbent article in the longitudinal direction.

Description

Absorbent article

The present invention relates to an absorbent article such as a light incontinence pad which is excellent in the adhesion to a wearer and a liquid such as a body fluid.

In the past, an absorbent article such as a light incontinence pad, a disposable disposable diaper, a sanitary napkin, a sanitary pad, or the like is known to have a liquid permeable top sheet and liquid impermeability. a back sheet, an absorbent body positioned between the top sheet and the back sheet, and an absorbent article positioned between the top sheet and the absorbent sheet.

In the absorbent article including such a second sheet, Patent Document 1 discloses an absorbent article having a second sheet in which both ends are folded toward the center line in the longitudinal direction and substantially folded along the center line (see FIG. 5). In the absorbent article of Patent Document 1, the second sheet is located on both end sides of the folding line because the elastic elastic member is provided in the longitudinal direction, so that the second sheet is separated from the absorbent body by the contraction of the elastic elastic member. On the other hand, the top sheet can be raised, and as a result, the absorbent article of Patent Document 1 can be made to maintain a good feeling of fit.

In addition, in the case of the elastic member such as a non-woven fabric which is permeable to the liquid, the left and right edge portions are folded back and the absorbent article is attached to the skin contact surface side of the absorbent body (see FIG. 4). In the absorbent article of Patent Document 2, the left and right edge portions of the elastic member are folded back downward, and the left and right edge portions of the elastic member are different from the rigidity in the longitudinal direction, whereby a good fit can be maintained. Sex, it can prevent deflection and leakage.

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2007-97715

[Patent Document 2] Japanese Patent Laid-Open No. 11-70141

In the absorbent article of Patent Document 1, since the second sheet and the absorbent body are often separated from each other by the contraction of the elastically stretchable member, the body fluid discharged from the wearer cannot be quickly absorbed in the absorbent body, and the body fluid is not absorbed. There may be a concern that the top sheet, the second sheet, and the void portion formed by the separation described above may remain. Further, when the body fluid remains in the top sheet and the second sheet, the wearer's skin is continuously wetted, giving the wearer a moist feeling and causing a foreign body sensation and discomfort.

Moreover, the absorbent article of Patent Document 2 because of the elastic structure Since the folded portion of the piece has only the left and right edge portions, the center portion cannot be sufficiently swelled, and in particular, when the wearer operates, there is a concern that it is difficult to maintain the state in which the top sheet is attached to the wearer's crotch portion. Further, in the region between the elastic member and the absorber sandwiched by the folded-back portions of the left and right edge portions of the elastic member, the elastic member and the absorber are separated to form a wide gap portion. As in the case of the absorbent article of Patent Document 1, the body fluid cannot be quickly absorbed, and there is a concern that the body fluid remains in the top sheet, the second sheet, the void portion, and the like.

In view of the above, an object of the present invention is to provide an absorbent article which is excellent in the fit to the wearer's crotch portion and allows the body fluid discharged from the wearer to be quickly and efficiently absorbed in the absorbent body. .

The absorbent article of the present invention is an absorbent article comprising a second sheet folded between a top sheet and an absorbent body, wherein the folded second sheet has the first state in an extended state. The surface and the second surface include a reference portion that is located on the top sheet side in a folded state, has a first direction and a second direction that are orthogonal to each other in plan view, and is in an extended state At least one of the first region portion and the second region portion, the region portion of at least one of the first region portion and the second region portion extending from each of the end portions of the reference portion in the second direction The portion having a p-line (p is an integer of 1 or more) extending in the first direction, the mountain fold line being a second sheet in an extended state, and the second sheet being used as a reference for the second surface The sheet is folded into a mountain fold a fold line; and a valley fold line extending in the first direction q (q is an integer of 0 or more), the valley fold line is a fold line for folding the second sheet into a valley based on the first surface, and the p strip One of the mountain fold lines is an end portion on the reference portion side of the second end portion of each of the first region portion and the second region portion, and the folded second sheet In the plan view, at least one of the first region and the second region of the second sheet in the extended state is adjacent to the side of the region where the region of the mountain fold line is extended. At least one of the partial region portions of the mountain fold extends in the wide direction across the central axis extending in the longitudinal direction of the absorbent article, and extends in the longitudinal direction across the central axis extending in the width direction of the absorbent article.

In the absorbent article of the present invention, the second sheet is folded at least once along at least one of the mountain fold lines, and since the second sheet in the folded state is viewed in plan, the reference portion facing the top sheet; At least one of the partial portions of the mountain fold region is folded by the mountain on the basis of the first surface, and extends in the longitudinal direction across the central axis extending in the longitudinal direction of the absorbent article, and extends in the longitudinal direction over the absorbent article. The central axis of the wide direction is extended (that is, at least in the central portion of the product), so that the top sheet is maintained to the wearer's crotch portion by the elastic action of the folded portions of the folded second sheet. In the bonding state, at least one of the reference portion and the partial portion of the mountain fold portion is interposed between the top sheet and the absorber at the center of the product (that is, at least two sheets of the second sheet are interposed therebetween) When the pressure is applied by the weight of the wearer or the like, the reference portion is in contact with the partial portion of the mountain fold region, and the body fluid such as urine discharged from the installer can be passed through The reference portion and the partial portion of the mountain fold region are quickly and efficiently absorbed by the absorber.

According to the present invention, it is possible to provide an absorbent article which is excellent in the adhesion to the inter-turn portion of the wearer and allows the body fluid discharged from the wearer to be quickly and efficiently absorbed by the absorbent body. The absorbent article of the present invention is excellent in the adhesion to the inter-turn portion of the wearer, and allows the body fluid discharged from the wearer to be absorbed quickly and efficiently in the absorbent body, so that it can be effectively prevented. The body fluid leaks from the gap between the wearer's skin and the absorbent article, and does not cause a moist feeling due to the liquid remaining on the top sheet, and provides a comfortable feeling for a long time.

1‧‧‧Light incontinence gasket

2‧‧‧ top sheet

3‧‧‧Second sheet

4‧‧‧Acceptor

5‧‧‧Back sheet

6‧‧‧Binder

7‧‧‧ embossing department

8‧‧‧ convex

S _P ‧‧‧ benchmark

A ₁ ‧‧‧1st Regional Department

A ₂ ‧‧‧Part 2

A _MF ‧‧ ‧ partial area of the mountain fold area

L _MF ‧‧‧ Mountain Line

L _VF ‧‧‧ Valley Line

P _MF ‧‧‧ mountain fold

P _VF ‧‧‧ Valley Folding

Fig. 1 is a plan view showing a state in which a light incontinence pad according to an embodiment of the present invention is stretched.

Fig. 2 is a partial cross-sectional view taken along line II-II' of Fig. 1.

3 is a perspective view of an elongated state of a second sheet in the light incontinence pad of FIG. 1.

Fig. 4 is a plan view of the second sheet in the stretched state of Fig. 3.

Figure 5 is a perspective view of the folded state of the second sheet of Figure 3.

Fig. 6 is a plan view showing an outline of a second sheet in the absorbent article of the present invention.

Fig. 7 is a perspective view showing another embodiment of the second sheet in a folded state.

Fig. 8 is a plan view showing a state in which the second sheet of Fig. 7 is stretched.

Fig. 9 is a perspective view showing still another embodiment of the second sheet in a folded state.

Fig. 10 is a plan view showing a state in which the second sheet of Fig. 9 is stretched.

Fig. 11 is a perspective view showing still another embodiment of the second sheet in a folded state.

Fig. 12 is a plan view showing a state in which the second sheet of Fig. 11 is stretched.

Fig. 13 is a perspective view showing still another embodiment of the second sheet in a folded state.

Fig. 14 is a plan view showing a state in which the second sheet of Fig. 13 is stretched.

Fig. 15 is a plan view showing a state in which a light incontinence pad according to another embodiment of the present invention is stretched.

Figure 16 is a partial cross-sectional view taken along line XVI-XVI' of Figure 15 .

Fig. 17 is a plan view showing a state in which a light incontinence pad according to still another embodiment of the present invention is stretched.

Figure 18 is a partial cross-sectional view taken along line XVIII-XVIII' of Figure 17 .

Fig. 19 is a plan view showing a state in which a light incontinence pad according to still another embodiment of the present invention is stretched.

Figure 20 is a partial cross-sectional view taken along line XX-XX' of Figure 19 .

[Formation for carrying out the invention]

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

Fig. 1 is a plan view showing a state in which a light incontinence pad according to an embodiment of the present invention is stretched, and Fig. 2 is a partial cross-sectional view taken along line II-II' of Fig. 1. As shown in FIGS. 1 and 2, the light incontinence pad 1 has a long central portion extending in the longitudinal direction D _L and an elliptical long central portion extending in the wide direction D _W in a plan view, that is, It has a so-called gourd shape. Further, the portion of the recess is a portion that functions as the leg portion P _{T of the} light incontinence pad 1 (absorbent article). Further, the shape of the absorbent article in the present invention is not limited thereto, and any shape may be formed as long as the length dimension of the longitudinal direction D _L is longer than the width dimension of the wide direction D _W (for example, a rectangle, Oval, etc.).

The light incontinence pad 1 is composed of a liquid-permeable top sheet 2 formed of a non-woven fabric, a liquid-permeable plastic film or the like on the side of the wearer's skin; and the superabsorbent polymer is dispersed in a short An absorbent body 4 formed of a fiber assembly such as a fluff pulp or a nonwoven fabric and held by a holder; a folded second portion formed between the top surface sheet 2 and the absorbent body 4 and formed of a liquid permeable sheet such as a nonwoven fabric The sheet 3 is composed of various members of the liquid-impermeable back sheet 5 at a position on the opposite side of the top sheet of the absorber 4.

The second sheet used in the absorbent article of the present invention will be described in detail with reference to the drawing. Fig. 3 is a perspective view showing a state in which a second sheet in a light incontinence pad according to an embodiment of the present invention (see Fig. 1) is stretched, and Fig. 4 is a plan view showing a second sheet in an extended state in Fig. 3. 3 and 4, in the present embodiment, the second sheet 3 having been stretched state by the first surface and the second surface S ₁ S ₂ forming liquid permeable sheet, and has: folded The lower position is on the top sheet 2 side, and the reference portion S _P having the first direction D ₁ and the second direction D _{2 which} are orthogonal to each other is viewed in plan view _; and the second portion from the reference portion S _P in the extended state The first region A ₁ in which the end of one of the directions D ₂ is extended.

The first region portion A ₁ is a mountain fold line L _MF having one extending in the first direction D ₁ , and the mountain fold line is in a state in which the second sheet 3 is stretched, and the first surface S ₁ is In the reference, the second sheet is folded into a fold line for the mountain fold, and the mountain fold line L _MF is the end portion on the reference portion S _P side of the both end portions in the second direction D ₂ of the first region portion A ₁ . . Further, in the present embodiment, the first direction D ₁ = the longitudinal direction D _{L of the} absorbent article. Further, as shown in FIGS. 2 and 5, the second sheet 3 in the present embodiment is folded along the mountain fold line L _{MF to} be folded, and the reference portion S _P and the first portion are adjacent to each other. The mountain fold partial region portion A _MF (in the present embodiment, A _MF = A ₁ ) on the side of the direction in which the first region portion A ₁ of the mountain fold line L _MF is extended in the region A ₁ is viewed in a plan view. simultaneously in the width direction D _W light incontinence pad extending across the longitudinal direction _L of D 1 is extended to the central axis C _L, D _L in the longitudinal direction for light incontinence pad extending across the width direction of the center 1 D _W The axis C _{W is} stretched (i.e., at least in the center of the article) and is disposed within the aforementioned light incontinence pad 1.

Thus, the folded second sheet 3 is elasticized by the mountain fold P _MF formed by the mountain fold, that is, by the action of the folded second sheet 3 to return to the stretched state. The top surface sheet 2 can be pushed from the back side by the reference portion S _P . The force acting to push the top sheet 2 is a force that utilizes only the elastic action of the mountain fold P _MF in the folded second sheet 3, and is weaker than when the conventional elastic stretch member is used. When the pressure of the wearer's weight or the like is not applied, the reference portion S _{P of the} folded second sheet 3 is separated from the mountain fold portion portion A _MF , and the reference is made when the pressure is applied. The portion S _{P is in} contact with the partial region portion A _{MF of the} mountain fold region to allow the second sheet 3 in the folded state to function. As a result, it is possible to achieve an appropriate fit with the action of the installer.

Further, the reference portion S _P and the mountain fold portion partial region A _{MF are} disposed in a plan view and are disposed at the center of the product of the light incontinence pad 1 and are applied by pressure of the wearer's body weight or the like. At this time, the reference portion S _P of the second sheet 3 in the folded state is in contact with the mountain fold portion portion A _MF , and is not in the center portion of the article because the second sheet 3 and the absorbent body 4 are not Since a large void portion is formed between the two, the body fluid such as urine discharged from the wearer can be quickly and efficiently absorbed by the absorbent body 4 via the reference portion S _P and the mountain partial region portion A _MF .

In the present embodiment, the first direction D ₁ coincides with the longitudinal direction D _{L of the} light incontinence pad 1 (absorbent article) in plan view, and the second sheet 3 is caused by the long direction along the light incontinence pad 1 D _L, a mountain fold is folded once, therefore, the operation with respect to the leg of the wearer from the loaded position in the longitudinal direction _L on both sides of the leg portion D P _T transmitted, the operation of the crotch portion is The folded second sheet 3 is in a state in which it is easy to deploy, that is, since the reference portion S _{P of the} second sheet 3 is separated from the mountain portion portion A _MF , it is easier to realize the fitting. Moderate fit of the person's movements.

Further, both end portions E _S and E ₁ in the second direction D ₂ of the second sheet 3 in the stretched state are not overlapped with the thickness direction of the absorbent article in a state in which the second sheet 3 is folded. over, furthermore, the first region of the portion of the side end portion a ₁ to E ₁ in a plan view of the reference position in the lower portion of the S _P (i.e., the reference portion in a plan view may be visually S _P only) so that the first direction of the second region portion D a ₁ L ₁ D ratio of a length direction of the second reference portion of the S _{P 2 2} shorter length L _S is particularly desirable. The both end portions E _S and E _{1 of} the second sheet 3 do not overlap in the thickness direction when the second sheet 3 is folded, and when the pressure of the wide direction is applied to the absorbent article with the action of the wearer The reference portion S _P and the mountain fold portion partial region A _{MF are} easily deformed in a direction in which they are separated from each other (in particular, the longer one of the lengths in the second direction D ₂ is more likely to be convex). The reference portion S _P can be more easily separated from the aforementioned partial region portion A _{MF of the} mountain fold region, and as a result, good fit can be obtained. Further, when the ratio of the portion of the first region A ₁ in the second direction D ₁ is longer in length L ₂ of the reference portion of the S _P D ₂ in the second direction length L _S, since the reference portion can advantageously S _P Since the ground is easily deformed into a convex shape, the top sheet can be pressed more reliably from the back side, and as a result, superior fit can be obtained. Further, in the present specification, the both end portions E _S and E ₁ in the second direction D ₂ of the second sheet 3 in the stretched state are in a state in which the second sheet 3 is folded, and do not overlap in absorption. The thickness direction of the article means a state in which the both end portions do not overlap at all, and for example, when the both end portions are linear, each end portion does not exist in the same thickness direction in the thickness direction of the absorbent article. The status on the line.

In the present embodiment, the second sheet 3 is folded along a mountain fold line L _MF extending in the first direction D ₁ and folded, but the second sheet in the present invention is not such. The form is limited. Fig. 6 is a plan view showing an extended state of the second sheet in the absorbent article of the present invention. As shown in FIG. 6, the second sheet 3 includes a reference portion S _P which is positioned on the top sheet side in a folded state and has a first direction D ₁ and a second direction which are orthogonal to each other in plan view. In the direction D ₂ and at least one of the first region portion A ₁ and the second region portion A ₂ extending from each of the end portions of the reference portion S _P in the second direction D ₂ in the extended state In the area portion, at least one of the first region A ₁ and the second region A ₂ has a p-line (p is an integer of 1 or more) extending in the first direction D ₁ . L _MF , the mountain fold line is a second sheet 3 in an extended state, a fold line for folding the second sheet 3 into a mountain fold based on the first surface S ₁ ; and a q extending in the first direction D ₁ a valley fold line L _VF for the strip (q is an integer of 0 or more), the valley fold line is a fold line for folding the second sheet 3 into a valley fold based on the first surface S ₁ , and constituting the mountain fold line of the p strip One of the L _MFs is an end portion on the side of the reference portion S _P in the both end portions of the second direction D ₂ of the first region portion A ₁ and the second region portion A ₂ .

Further, the second sheet 3 is formed in the region portion of the reference portion S _P and at least one of the first region portion A ₁ and the second region portion A ₂ adjacent to the region of the mountain fold line L _MF . At least one of the partial region A _MF of the mountain fold region on the direction side is extended in the plan view, and extends in the width direction D _W across the central axis C _L extending in the longitudinal direction D _L of the absorbent article. The direction D _{L is} stretched across a central axis C _W extending in the width direction D _W of the absorbent article (that is, in a manner at least present in the central portion of the article), and is disposed on the top sheet of the absorbent article And between the absorbers. Further, in the present specification, as shown in FIG. 6, the mountain fold partial region portion A _MF means that the first region portion A ₁ and the second region portion A _{2 are} adjacent to the aforementioned mountain fold line L _MF . The region on the side in which the first region portion A ₁ and the second region portion A _{2 are} extended, that is, the region from the mountain fold line L _MF to the next fold line or the absence of the fold line to the end portion of the second sheet.

The second sheet 3 folded as described above is pushed by the elastic action of the mountain fold portion P _MF and the arbitrary valley fold portion P _VF formed by the mountain fold and the arbitrary valley fold, and the reference portion S _P can be pushed up. The aforementioned top sheet is pushed from the inside side. The force for pressing the top sheet is weaker than when the conventional elastically stretchable member is used. Therefore, when the pressure of the wearer or the like is not applied, the reference portion S _P and the first region portion are And the second area portion is separated by a plurality of divided area portions in which the respective fold lines are separated, and when the pressure is applied, the second sheet 3 can be made to function, and the reference portion S _P can be in contact with the plurality of divided regions. Achieve a moderate fit that matches the wearer's movements. In addition, at least one of the reference portion S _P and the partial portion of the mountain fold portion is disposed in the center of the product, and when the pressure of the wearer or the like is applied, the reference portion S _{P is separated} from the plurality of portions. In the center portion of the product, the large gap portion is not formed between the second sheet 3 and the absorber 4, so that the body fluid such as urine discharged from the installer can be passed through the reference portion. The S _P and at least one mountain fold portion A _MF are quickly and efficiently absorbed in the absorbent body 4.

Further, the second sheet in the present invention is the end portion of the second sheet in the second direction (that is, when the second sheet 3 does not have the second region portion A ₂ , it is the reference in FIG. 4 or the like. end E _S E and the end portion of the first region a ₁ of the side portion S _{P 1;} second sheet 3 when the portion having the second region a _2, the second region is an end portion in FIG. 6 a ₂ side It is preferable that the portion E ₂ and the end portion E ₁ ) on the first region A ₁ side, the mountain fold portion P _{MF ,} and the valley fold portion P _VF are folded so as not to overlap in the thickness direction, and further, only in a plan view It is particularly desirable that the aforementioned reference portion S _P is foldably visible. When the end portions of the second sheet in the second direction, the mountain fold portion P _MF and the valley fold portion P _VF do not overlap in the thickness direction, the pressure in the wide direction is applied to the absorbent article in accordance with the action of the wearer. In this case, the reference portion S _P , the partial mountain portion partial region A _MF or the valley portion partial region A _{VF are} easily deformed in a direction in which they are separated from each other (in particular, the length in the second direction D ₂ ) The elder is more likely to be deformed into a convex shape, and the reference portion S _P can be more easily separated from the mountain fold portion portion A _MF or the valley portion partial region A _VF , and as a result, good fit can be obtained. Further, when viewed in plan view and folded so that only the reference portion S _P is visible (that is, the length in the second direction D ₂ of the reference portion S _P is larger than the aforementioned partial portion of the mountain fold portion A _MF or the aforementioned valley portion When the length of the second region D ₂ of the partial region portion A _VF is longer, the reference portion S _{P is} likely to be favorably formed into a convex shape, so that the top sheet can be more reliably pressed from the back side, and as a result, superior results can be obtained. Sense of fit. In the present specification, the partial region unit A _VF valley fold zone, means: the first region portion A ₁ and the second region portion A _2, adjacent to the valley-folding lines L _VF of the first region portion A ₁ And a region on the direction side in which the second region portion A ₂ extends, that is, a region from the valley fold line L _VF to the next fold line or no fold line to the end portion of the second sheet.

Hereinafter, several embodiments of the second sheet used in the absorbent article of the present invention will be specifically described with reference to the respective drawings.

The second sheet 3 in the folded state shown in Fig. 7 is folded along one mountain fold line L _MF and one valley fold line L _VF by one mountain fold and one valley fold. The second sheet 3 is folded state is shown in FIG., In a stretched state having a reference portion of the first region S _P portion A ₁ 8, furthermore, the first part region A _1, having: An end portion on the side of the reference portion S _P in the second direction D ₂ of the first region portion A ₁ , and a mountain fold line L _MF extending in the first direction D ₁ ; and a bit line in the mountain line a region between the L _MF and the end portion E ₁ on the side opposite to the reference portion S _P side in the second direction D ₂ of the first region portion A ₁ , and one valley fold line L extending in the first direction D _{1 VF} .

Further, the second sheet 3 in the folded state shown in Fig. 7 is viewed in plan, the reference portion S _P ; the mountain fold line L _MF and the valley fold line L _VF between the mountain fold portion portion A _MF ; a valley fold region portion of the region a _VF between the valley-folding lines L ₁ and the end portion of _{the VF} E, D to _{W is} the width direction while extending across the longer direction of the absorbent article D _L C _L extending central axis, and in The long direction D _L is disposed in the aforementioned absorbent article across a central axis C _W extending in the width direction D _W of the absorbent article (that is, at least in the central portion of the article).

The second sheet 3 in the folded state in this embodiment can be elasticized by the position of the two portions of the mountain fold portion P _MF and the valley fold portion P _VF formed by the mountain fold and the valley fold. Since the reference portion S _P is stably pushed up in the substantially vertical direction, the top surface sheet is pressed from the back side, and an appropriate fit can be achieved. Further, since the reference portion S _P , the partial mountain portion region A _MF , and the valley portion partial region A _VF are disposed in the center portion of the product of the absorbent article in a plan view, the center portion of the product is A large gap portion is not formed between the second sheet 3 and the absorber 4, and body fluid such as urine discharged from the installer can be passed through the reference portion S _P and the partial portion of the mountain fold region. A _MF and a portion of the aforementioned valley-folding region A _VF are quickly and efficiently absorbed in the absorbent body 4.

The second sheet 3 in the folded state shown in Fig. 9 is folded along the two mountain fold lines L _MF1 , L _MF2 and one valley fold line L _VF by two mountain folds and one valley fold. As shown in FIG. 10, the second sheet 3 in the folded state has a reference portion S _P and a first region portion A ₁ in an extended state, and the first region portion A ₁ is in place. An end portion of the first region A ₁ in the second direction D ₂ on the side of the reference portion S _P , and one first mountain fold line L _MF1 extending in the first direction D ₁ and the first mountain fold line L _MF1 and the first region of the portion a ₁ in the second direction D ₂ of the opposite side of the reference portion S _P region between _a side end E, the direction toward the extending portion of the first region a ₁ has the sequence: extending in the first direction D 1 Article 2 mountain fold line L _{MF2 1,} the first direction D 1 and the valley-folding lines L _VF Article extending in the _1.

Further, the second sheet 3 in the folded state shown in Fig. 9 is viewed in plan, the reference portion S _P ; the second mountain fold line L _MF2 and the second portion of the second portion between the end portions E ₁ a _MF2 to portion D in the width direction _{W is} extending across the absorbent article in the longitudinal direction D of the central axis C _{L L} while extending in the longitudinal direction to extend across the D _L D _{W is} the width direction of the center axis of the absorbent article The C _W stretch (that is, at least in the central portion of the product) is disposed in the absorbent article.

The second sheet 3 in the folded state in this embodiment is the first mountain fold portion P _MF1 , the second mountain fold portion P _{MF2 ,} and the valley fold formed by the two times of the mountain fold and the first valley fold. Since the elastic portion of the portion P _VF acts to push the reference portion S _P more strongly than the above-described embodiment, the top surface sheet can be relatively strongly pressed from the back side while maintaining an appropriate bonding state. Further, since the reference portion S _P and the second mountain fold portion portion area A _MF2 are disposed in the center portion of the product of the absorbent article in a plan view, the second sheet 3 is formed in the center portion of the product. A large void portion is not formed between the absorbers 4, and body fluid such as urine discharged from the installer can be passed through the reference portion S _P and the second mountain fold portion portion A _MF2 in the absorber 4 Quickly absorbed.

Further, the second sheet 3 in the folded state in the present embodiment is the first mountain fold portion partial region A _MF1 between the first mountain fold line L _MF1 and the valley fold line L _VF , and the valley fold line L The valley portion partial region A _VF between the _VF and the second mountain fold line L _{MF2 is} disposed so as not to exist in the center portion of the product, but the regions may be disposed in the center portion of the product, and When configured in this way, since the number of sheets of the second sheet 3 interposed between the top sheet 2 and the absorbent body 4 is increased, the body fluid discharged from the wearer can be made more quickly and efficiently in the absorbent body 4. absorbed.

The second sheet 3 in the folded state shown in Fig. 11 is a mountain fold line L _MF , L' _MF and two valley fold lines L _VF , L' _VF along two sides sandwiching the reference portion S _P by 2 The second mountain fold and the second valley fold are folded. As shown in FIG. 12, the second sheet 3 in the folded state has a reference portion S _P and a first region portion A ₁ and a second region portion A ₂ in an extended state, and the first region The portion A ₁ is a mountain fold line L _MF having one end portion on the reference portion S _P side in the second direction D ₂ of the first region portion A ₁ and extending in the first direction D ₁ . And a region between the mountain fold line L _MF and the end portion E ₁ on the side opposite to the reference portion S _P side in the second direction D ₂ of the first region portion A ₁ , and extending in the first direction a valley fold line L _{VF of} D ₁ , the second region portion A ₂ having an end portion on the side of the reference portion S _P in the second direction D ₂ of the second region portion A ₂ and extending over ends _MF and the second region portion a in the second direction D _{2 2} reference portions S _P side opposite to the side; the first direction D 1 of the mountain folding lines L 'and located in the fold line and the mountain L _{MF' 1} of A region between the portions E ₂ and a valley fold line L' _VF extending in the first direction D ₁ .

Further, the second sheet 3 in the folded state shown in Fig. 11 is viewed in plan, the reference portion S _P ; the mountain fold line L _{MF of the} first region A ₁ and the mountain fold portion between the valley fold line L _VF a _MF unit area while in the width direction D _W extending across the length of the absorbent article in the central axis direction D _L C _L extending in the longitudinal direction to extend across the width D _L D _W direction of the center of the absorbent article The axis C _{W is} stretched (that is, at least present in the central portion of the article) in the absorbent article.

The second sheet 3 in the folded state in the embodiment is the mountain fold portion P _MF of the first region A _{1 and} the second region formed by the two times of the mountain fold and the valley fold of the second time. a spring action of mountain fold portion ₂ P _'MF, the first valley-folded portion a region P ₁ and the second region _VF a portion of the valley-folded portion ₂ P' 4 places of _VF, thereby more stably The reference portion S _{P is} pushed up by force, and the reference portion S _P and each mountain fold region can be made in accordance with the pressure application method such as the weight of the wearer by the position of the elastic action at four places. Part of the area is partially separated and in contact, so that superior fit can be achieved. In addition, since the reference portion S _P and the mountain fold portion partial region A _{MF of the} first region portion A ₁ are disposed in the center portion of the product of the absorbent article in a plan view, the product center portion is A large gap portion is not formed between the second sheet 3 and the absorber 4, and the body fluid such as urine discharged from the installer can be passed through the base portion S _P and the first region portion A ₁ The zone partial area A _MF is absorbed quickly and efficiently in the absorbent body 4.

Further, the second sheet 3 in the folded state in the present embodiment is a mountain fold portion portion A' between the mountain fold line L' _MF of the second region A ₂ and the valley fold line L' _VF . _MF is disposed so as not to exist in the center portion of the product, but the region may be disposed so as to exist in the center portion of the product (in this case, the second sheet 3 is the first region A ₁ and the aforementioned a second region ₂ at a lower side portion of the reference portion of the S _P overlap folding, or to the first region a portion of the valley-folded portion P _{VF 1} and the second region a ₂ portion of the valley-folded portion P ' The manner in which the _{VF is} aligned is folded.) When configured in this way, since the number of sheets of the second sheet 3 interposed between the top sheet 2 and the absorbent body 4 is increased, the body fluid discharged from the installer can be allowed to be The absorbent body 4 is absorbed quickly and efficiently.

The second sheet 3 in the folded state shown in Fig. 13 is folded along the two mountain fold lines L _MF1 and L _MF2 by two mountain folds. The second sheet 3 is folded state is shown in FIG., In a stretched state having a reference portion of the first region S _P unit A ₁ 14, Further, the first part region A _1, having: An end portion on the reference portion S _P side in the second direction D ₂ of the first region portion A ₁ and one first first mountain fold line L _MF1 extending in the first direction D ₁ ; a region between the opposite _end portion E side of the first mountain fold line L _MF1 and the second portion of the first region a ₁ in the direction D in the reference section S _{2 P} side and extending in the first direction D 1 ₁ of 1 Article 2 mountain fold line L _MF2 .

Further, the second sheet 3 in the folded state shown in Fig. 13 is viewed in plan, the reference portion S _P ; the first mountain between the first mountain fold line L _MF1 and the second mountain fold portion portion area A _MF2 a folded portion _MFl partial region area; mountain fold line and the second partial region L _MF2 and second portions a mountain fold region between the end portions E _{1 MF2,} in order to extend across the width direction D _W of the absorbent article D _L of the longitudinal direction of the central axis C _L, while extending in the longitudinal direction D _L extending across the width direction of the absorbent article extending central axis D _W C _W extension (i.e., present in at least the central portion of the article) be It is disposed in the aforementioned absorbent article.

Even in the second sheet 3 in the folded state in the embodiment, the elastic force of the first mountain fold portion P _MF1 and the second mountain fold portion P _MF2 formed by the two times of the mountain fold is pushed up. The reference portion S _P can maintain the appropriate bonding state while reliably pressing the top sheet from the back side. Further, the reference portion S _P , the first mountain fold region partial region A _MF1 , and the second mountain fold region partial region A _MF2 are arranged in a plan view, and are disposed in the center of the product of the absorbent article. The body fluid such as urine discharged from the installer can be absorbed in the center portion of the product through the reference portion S _P , the first mountain fold region portion A _MF1, and the second mountain fold region portion A _MF2. Body 4 is absorbed quickly and efficiently.

Next, the fixing form of the second sheet in the absorbent article of the present invention will be specifically described with reference to the drawings. Fig. 15 is a plan view showing a state in which a light incontinence pad according to another embodiment of the present invention is stretched, and Fig. 16 is a partial cross-sectional view taken along line XVI-XVI' of Fig. 15. The absorbent article of the present invention has a body fluid absorption zone T _A and regions T _B and T _B' other than the body fluid absorption zone in the longitudinal direction D _{L of the} product as shown in Fig. 15 . Here, the "body fluid absorption region" refers to a region corresponding to the body fluid discharge position of the wearer when the absorbent article is worn, and the type of the absorbent article is specifically urination, defecation, menstrual blood, etc. The type of body fluid to be discharged; the age and sex of the wearer; the contact area with the wearer; the area where the structure of the absorber is appropriately set. In addition, the "region other than the body fluid absorption region" refers to a region other than the body fluid absorption region, and includes a region in which the body fluid that is excluded from the user is not absorbed, and a body fluid discharge that is not equivalent to the installer. The area of the location absorbs the area of bodily fluid discharged from the installer.

In the present invention, the second sheet in the folded state is effective in utilizing the elastic action of each of the folded portions, and the separation and contact of the reference portion with the partial portion of the mountain fold portion in accordance with the wearing state of the absorbent article. Since the degree of freedom is increased, it is desirable that at least the body fluid absorption region T _{A of the} absorbent article and the opposing faces of the second sheet in the folded state are not joined to each other. In this manner, when the degree of freedom of separation and contact between the reference portion and the partial portion of the mountain fold portion is highly formed, even if the wearer stands or moves or sits, the absorbent article is applied to the absorbent article. When the pressure is changed, the applicable range in which the reference portion is separable or in contact with the partial portion of the mountain fold portion can be expanded in accordance with the change in the pressure, and the good fit to the wearer can be further achieved.

Further, the second sheet in the folded state may have the joints T _B and T _B′ outside the body fluid absorption region of the light incontinence pad 1 (absorbent article) as shown in FIGS. 15 and 16 . The joint portion P _B of the opposing faces of the second sheet 3 in the folded state. Since such a joint portion is provided, in the region other than the body fluid absorption region of the folded second sheet, since the reference portion is not separated from the portion of the mountain fold portion, it is not necessary for the wearer to be licked. In the region where the intermediate portion is bonded, the pressure of the absorbent article is changed by the action of the wearer and the state of use, and the body fluid discharged from the wearer can be smoothly absorbed in the absorbent body.

Further, the means other than the opposing surfaces of the second sheet in the folded state in the region other than the body fluid absorption region is not particularly limited, and for example, an adhesive such as melting or heat sealing can be used. Any bonding means such as hot pressing, embossing, or the like.

The light incontinence pad 1 (absorbent article) shown in Fig. 15 and Fig. 16 is an embodiment in which an adhesive 6 such as hot melt is used as a joining means. In this embodiment, the joint portion P _B is formed only between the opposing faces of the second sheet in the folded state, and since the diffusion of the body fluid flowing over the aforementioned reference portion of the second sheet is not hindered, The body fluid discharged from the wearer can be smoothly absorbed from the absorbent body 4 from a wide range of areas.

Fig. 17 is a plan view showing a state in which a light incontinence pad according to still another embodiment of the present invention is stretched, and Fig. 18 is a partial cross-sectional view taken along line XVIII-XVIII' of Fig. 17. The light incontinence pad 1 (absorbent article) shown in Figs. 17 and 18 is an embodiment in which the thermocompression bonding portion 7 formed by embossing on the side of the top sheet 2 is used as a means of bonding. In this embodiment, the joint portion P _{B is} formed across the top sheet 2, the second sheet 3, and the absorber 4, and the top sheet 2, the second sheet 3, and the absorber 4 are integrally fixed and fixed. Therefore, the body fluid discharged from the wearer can be smoothly absorbed in the absorbent body 4.

Next, the second sheet used in the present invention will be described. The second sheet used in the present invention is not particularly liquid-permeable sheet such as a nonwoven fabric which is generally used in the field of absorbent articles. However, it is particularly preferable to use a sheet-like fibrous structure such as a nonwoven fabric formed of fibers having a fiber diameter of 1 to 5 denier. When the fiber diameter of the fiber constituting the sheet-like fiber structure is less than 1 Danny, the rigidity of the second sheet is insufficient, and the second sheet in the folded state is weak in the state of being stretched, so even if Such a second sheet is disposed in the absorbent article, and there is a concern that the desired fit cannot be obtained. In addition, when the fiber diameter of the fiber constituting the sheet-like fiber structure exceeds 5 denier, the rigidity of the second sheet is too high, and there is a concern that the wearer feels foreign matter and discomfort.

Further, the second sheet used in the present invention may have a laminated structure formed of two or more sheet-like fibrous structures. When the second sheet is a laminated structure, even if the fiber diameter of the fibers constituting the sheet-like fiber structure is less than 1 Danny, the predetermined rigidity can be ensured as the second sheet, and by changing the type of each layer, The number of layers can adjust the liquid permeability and rigidity (or the fit along with the rigidity) of the second sheet easily and with high precision.

The basis weight of the sheet-like fibrous structure used in the second sheet is not particularly limited, but the liquid permeability and the rigidity of the sheet are preferably 10 to 60 g/m ² , and 15 to 45 g/m. ² is more ideal.

Fig. 19 is a plan view showing an extended state of a light incontinence pad according to still another embodiment of the present invention, and Fig. 20 is a partial cross-sectional view taken along line XX-XX' of Fig. 19. In the second sheet used in the present invention, as shown in FIG. 19 and FIG. 20, a plurality of convex portions 8 on the first surface are formed in a dot shape, and the second surface is formed in a flat structure (hereinafter referred to as "Second sheet with convex portions"). The shape of the convex portion 8 is not particularly limited, and may be any shape such as a columnar shape, a prismatic shape, or a truncated anchor shape, even in the hemispherical shape as shown in Figs. 19 and 20 . Further, in the dot pattern of the convex portion 8, each convex portion is uniform in plan view (that is, the distance between the convex portions is constant), and unevenness may be formed in a specific region (that is, as a specific region) The distance between the convex portions in the inside is shortened). The manufacturing method of the second sheet having the above-mentioned convex portion is not particularly limited, and any known manufacturing method can be employed in the art, and for example, a manufacturing method disclosed in Japanese Laid-Open Patent Publication No. 2014-004490, or the like can be employed. In the present specification, the term "flat" refers to a plane in which a process of imparting a specific shape such as unevenness (for example, embossing, vacuum formation, or the like) is not applied, and for example, in a sheet-like fiber structure such as a nonwoven fabric. Even if the surface has a fine uneven shape due to the constituent fibers, the surface of the sheet-like fibrous structure is flat if no treatment for imparting the specific shape described above is applied.

The light incontinence pad 1 (absorbent article) shown in Figs. 19 and 20 is an embodiment in which the second sheet 3' having the convex portion is used. The second sheet having the convex portions in the present embodiment 3 'is a plurality of projections having a first surface portion 8 as a reference, the first direction D ₁ extending in the longitudinal direction coincides with the direction _L of article D One of the mountain fold lines is folded by the mountain and folded, and is disposed between the top sheet 2 and the absorbent body 4 in a folded state. The second sheet 3' having the convex portion in the folded state thus disposed is the surface opposite to the top sheet 2 of the reference portion S _P and the absorption portion of the partial portion A _MF ' The opposing faces of the body 4 are each located with a plurality of projections 8 located therein.

When the second sheet 3' having the convex portion is disposed as described above, the pressure applied from the side of the top sheet 2 of the product by the action of the wearer, the state of use, and the like is passed through the second sheet 3' having the convex portion. The plurality of convex portions 8 of the reference portion S _P are transmitted to the plurality of convex portions 8 of the partial region A _MF of the mountain fold region, and further, the convex portions 8 of the partial region portion A _MF of the mountain fold region are partially pressed A plurality of high-density portions may be formed on the surface of the absorbent body 4 on the surface of the absorbent body 4. When such a high-density portion is formed on the surface of the absorber 4, the body fluid remaining in the top sheet 2 and the second sheet 3' having the convex portion can be actively sucked into the high-density portion. In the low-density portion of the portion other than the high-density portion, the liquid body discharged from the installer can be temporarily stored in the absorber 4, even when the discharge rate of the body fluid of the installer is high. Efficiently absorbed.

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

Claims (7)

An absorbent article comprising an absorbent article of a second sheet folded between a top sheet and an absorbent body, wherein the folded second sheet has a first side in an extended state and The second surface includes a reference portion that is located on the top sheet side in a folded state, has a first direction and a second direction that are orthogonal to each other in plan view, and a state in which it is stretched from the front side At least one of the first region portion and the second region portion in which each of the end portions of the reference portion extends in the second direction, and at least one of the first region portion and the second region portion It is characterized in that: a p-line (p is an integer of 1 or more) extending in the first direction, the mountain fold line is a second sheet in an extended state, and the second sheet is folded on the basis of the first surface a fold line extending into the mountain; and a valley line extending in the first direction q (q is an integer of 0 or more), the valley line being a fold line for folding the second sheet into a valley based on the first surface, and One of the mountain fold lines of the above p is located in the first region and The end portion on the reference portion side of each of the second end portions of the second region portion, the folded second sheet is viewed in plan, in the reference portion; and in the stretched state At least one of the first region portion and the second region portion of the second sheet adjacent to at least one of the mountain fold region portion of the side of the mountain fold line extending in the direction of the region, in the width direction Along the central axis extending in the longitudinal direction of the absorbent article, the central axis extending in the width direction of the absorbent article in the longitudinal direction The line is stretched, and the folded second sheet is at least in the body fluid absorption region of the absorbent article, and the opposite faces of the second sheet in a folded state are not joined to each other, and the folded second sheet is The region other than the body fluid absorption region has a joint portion that faces the opposing faces of the second sheet in a folded state. The absorbent article according to claim 1, wherein the first direction coincides with the longitudinal direction of the absorbent article in a plan view. The absorbent article according to the first or second aspect of the invention, wherein the second sheet to be folded is not in the second direction of the second sheet in a state in which the second sheet is stretched. The thickness direction of the absorbent article is folded in an overlapping manner. The absorbent article according to the first or second aspect of the invention, wherein the folded second sheet includes only the first region portion of the first region portion and the second region portion, and Each of the first region portions has a mountain fold line and a valley fold line. The absorbent article according to claim 1 or 2, wherein the folded second sheet includes both the first region portion and the second region portion, and the first region portion Each of the regions of the second region portion has a mountain fold line and a valley fold line. Such as the absorption of the first or second item of the patent application scope In the second sheet folded, the surface of the first surface and the second surface in the stretched state has a plurality of convex portions, and the other surface is flat. . The absorbent article according to claim 6, wherein the plurality of convex portions are provided on the first surface.