TW201904538A - Absorbent article - Google Patents

Abstract

The present invention provides an absorbent article that is less likely to cause discomfort to a wearer even when a displacing force is repeatedly applied over a long period of time, and is less likely to cause or worsen skin conditions such as pressure ulcer. This absorbent article comprises: a main section (2) having a liquid-permeable surface sheet (21); and a cover sheet (3) located nearer the skin-side surface than the surface sheet (21) in at least a back region (AB) and partially bonded to the main section (2). The cover sheet (3) has: a stretching region (32) that is stretchable in at least the longitudinal direction; and in the stretching region (32), one or more strength retention sections (31) extending in the longitudinal direction.

Description

Absorbent article

The present invention relates to an absorbent article such as a urine absorbing pad, a disposable disposable diaper, and the like, and more particularly to an absorbent article which is less likely to cause acne or rash on the skin of a wearer.

In recent years, various methods for improving skin diseases such as acne and rash (dermatitis) on the skin of a wearer have been discussed in absorbent articles such as a urine absorbing pad and a disposable diaper.

In the case of such an absorbent article, for example, Patent Document 1 discloses a disposable urine absorbing pad having a function for preventing acne, which comprises an outer sheet and an absorbent body provided on the body side of the outer sheet. An inner surface sheet provided on the body side of the absorbent body, a left side sheet provided on the left side portion of the spacer, a right side sheet provided on the right side portion of the spacer, an overlapping sheet provided on the buttock region, and the overlap A low friction member between the sheet and the inner sheet, the right side edge and the left side edge of the overlap sheet are joined to the left side portion of the right side sheet and the right side portion of the left side sheet, respectively. The disposable urine absorbing pad disclosed in Patent Document 1 is inexpensive to manufacture, and the overlapping sheet is relatively easy to move in the front-rear direction with respect to the inner sheet, so that it has a function of preventing the occurrence and deterioration of acne. Furthermore, in the above-mentioned superimposed sheet, the above-mentioned superimposed sheet also discloses a sheet which is stretchable at least in the front-rear direction of the urine absorbing pad, and by using such a stretchable sheet, even when the bed is raised, the wheelchair When the wearer's buttocks are displaced forward, the overlapping sheets can move together with the buttocks, so that the occurrence and deterioration of acne can be prevented. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Laid-Open Patent Publication No. 2014-155609

[Problems to be solved by the invention]

However, the absorbent article such as the urine absorbing pad is used by the user for a long period of time depending on the posture change of the wearer when the child is lifted up, when using the wheelchair, when turning over during sleep, and the like. Therefore, as for the urine absorbing pad disclosed in Patent Document 1, only the stretchable sheet is used as the overlap sheet (cover sheet), and the wearer's buttocks are offset in the front-rear direction due to the change in the position of the wearer described above. When the state of the movement is repeated, the force is applied to the rear side in the longitudinal direction of the absorbent article in a state where the wearer's body pressure is applied, and the portion having the stretchability of the cover sheet is provided ( In general, the portion having such stretchability is provided with a structure that imparts stretchability, and the strength is lowered.) A plurality of wrinkles are aggregated to be in a state of being contracted in the longitudinal direction, because the offset is repeatedly applied by the state thereof. The force is maintained, and it is not easy to return to the original state. Therefore, the intended function of covering the sheet (that is, the so-called cover sheet is moved in conjunction with the wearer's buttocks, and is not easy to wear. The skin is given the function of friction and the physical stimulation caused by the biasing force.) It cannot be fully exerted, and as a result, the wearer may feel uncomfortable or near the buttocks of the wearer (specifically, near the sacrum) It causes concern about the occurrence and deterioration of skin diseases such as acne.

In view of the above, it is an object of the present invention to provide a wearer who is less prone to discomfort when the biasing force is applied over a long period of time, and which is less likely to cause skin diseases such as acne and deteriorated absorption. article. [Means for solving problems]

An aspect of the present invention (the aspect 1) has a longitudinal direction, a broad side direction, and a thickness direction, and has a front region, a rear region, and the two regions in the longitudinal direction. The absorbent article of the central region is characterized in that: the absorbent article comprises: a main portion of the liquid permeable surface sheet, and a cover sheet which is at least in the rear region and is more in the skin than the surface sheet The cover side is joined to the main portion, and the cover sheet has at least an elongated region that is extensible in the longitudinal direction, and has one or a plurality of strength retentions that extend in the longitudinal direction of the elongated region. unit.

In the absorbent article of the first aspect, since one or a plurality of strength holding portions extending in the longitudinal direction are provided in the elongated region of the cover sheet, when the offset force in the longitudinal direction is applied in the absorbent article, the cover sheet is covered. In addition to the state in which the plurality of wrinkles are not easily aggregated and contracted in the longitudinal direction, it is assumed that the extended region of the cover sheet temporarily becomes the contracted state in the longitudinal direction as long as the offset force is applied over a long period of time. The strength (rigidity) of the strength holding portion is easily restored to the original state. Therefore, in the absorbent article of the present aspect, when the biasing force is applied singly, even if the biasing force is applied over a long period of time, the intended function of the covering sheet can be sufficiently exerted (that is, the so-called covering) The sheet is moved and stretched in accordance with the action of the wearer's buttocks, and it is difficult to impart a physical stimulation to the wearer's skin due to friction or offset force. As a result, the wearer is less likely to feel uncomfortable. It is also less likely to cause the occurrence and deterioration of skin diseases such as acne.

In addition, in the present specification, the "excretion liquid" of the object to be absorbed by the absorbent article is not particularly limited as long as it can be absorbed and held by the absorbent body to be described later, for example, in addition to urine, sweat, and liquid substances such as blood. It also contains low-viscosity materials such as soft stools.

According to another aspect of the invention, in the absorbent article according to the aspect 1, the cover sheet has the end portions extending in the longitudinal direction of each of both end portions in the width direction. The side side non-elongation region is joined to the main portion at the side side non-elongation region.

In the absorbent article according to the second aspect, the peripheral portion of the joint portion between the cover sheet and the main portion where stress is easily concentrated when a biasing force is applied in the longitudinal direction, and the cover sheet is formed by the non-elongation region, whereby a certain strength can be secured. Therefore, even if the biasing force is applied over a long period of time, the covering sheet is less likely to be broken, and the function of the above-mentioned covering sheet can be exhibited more stably. As a result, in the absorbent article of the present aspect, the above-described effects can be achieved more stably for a longer period of time (that is, there is a so-called uncomfortable feeling that the wearer is uncomfortable, and the occurrence and deterioration of skin diseases such as hemorrhoids are also caused. Not easy to cause effects).

According to another aspect of the invention, in the absorbent article of the aspect 1 or 2, the elongated region is at least one of both end portions of the wide side direction. The end portion side elongating portion that is adjacent to the strength holding portion in the width direction, and the end portion side elongating portion has a thickness extending toward the skin facing surface side and extending continuously in the width direction. a ridge portion and a concave portion that is recessed toward the non-skin opposing surface side in the thickness direction and that continuously extends in the widthwise direction, and has a concave-convex structure that is alternately arranged in the longitudinal direction, and The ridge portion has a length in which the length in the width direction is long, and the first ridge portion that contacts the edge in the width direction of the elongated region and the length in the width direction are short, and are not in contact with the edge of the wide side direction of the elongated region. In the second ridge portion, the cover sheet is overlapped with the end portion on the outer side in the width direction of the first ridge portion in a plan view, and is not overlapped with the second ridge portion. In the aforementioned main part.

In the absorbent article according to the third aspect, the stretched region of the cover sheet has the specific uneven structure described above, and the cover sheet contains a part of the specific uneven structure (that is, the outer side of the first ridge portion is widened). The specific region of the side end portion is joined to the main portion. Therefore, the first ridge portion is widened as wide as possible in the widthwise direction to ensure the extended region of the cover sheet, and the second ridge is also provided. a portion between the end portion on the outer side in the width direction and the joint portion (a non-shaped portion to be described later), when the biasing force is applied to the longitudinal direction of the absorbent article, the cover sheet is easily concentrated in stress Since the peripheral portion of the joint portion of the main portion ensures a certain strength, even if the biasing force is applied over a long period of time, the covering sheet is less likely to be broken, and the above-described function of the covering sheet can be more reliably and stably exhibited. .

According to still another aspect of the invention, in the absorbent article of the aspect 3, the end side extension portion is the first ridge portion and the second ridge portion interposed therebetween The groove portions are alternately arranged in the longitudinal direction.

In the absorbent article according to the fourth aspect of the invention, the first ridge portion and the second ridge portion are alternately arranged in the longitudinal direction via the groove portion, so that the first ridge portion and the second ridge portion are alternately arranged in the longitudinal direction. a portion between the end portion on the outer side in the width direction of the ridge portion and the joint portion (that is, the cover sheet and the main portion where stress is easily concentrated when a biasing force is applied in the longitudinal direction of the absorbent article) The peripheral portion of the joint portion, which can ensure a certain strength, is formed at a certain interval along the longitudinal direction of the cover sheet, and can further stably resist the above-mentioned offset along the longitudinal direction of the cover sheet. The strength of the force.

According to still another aspect of the invention, in the aspect of the aspect of the aspect of the aspect of the aspect of the aspect of the invention, the strength holding portion is in the longitudinal direction of the elongated region. The front side edge extends to the rear side edge.

In the absorbent article according to the aspect 5, since the strength holding portion of the cover sheet extends from the front side edge to the rear side edge in the longitudinal direction of the elongated region, it can be in the entire long-side direction of the elongated region. The function of the above-described strength holding portion is exerted (that is, when the biasing force in the longitudinal direction is applied to the absorbent article, it is difficult to cause the stretched region of the cover sheet to be gathered in a plurality of wrinkles and contracted in the longitudinal direction. When the biasing force is applied over a long period of time and the extended region of the cover sheet is in a state of being contracted in the longitudinal direction described above, it is easy to return to the original state.

According to still another aspect of the invention, in the aspect of the aspect of the invention, the absorbent article according to any one of the aspects 1 to 5, wherein the absorbent article further comprises the surface in the thickness direction a low-friction member between the sheet and the cover sheet, the cover sheet having a front side closer to the front end edge of the long-side direction of the low-friction member and extending in the width direction in a plan view Non-extended area on the front side.

The absorbent article of this aspect 6 further comprises a low friction member positioned between the surface sheet and the cover sheet (that is, on the non-skin opposing side of the cover sheet), so that the low friction member is interposed Further, the frictional resistance between the cover sheet and the surface sheet is reduced, and the action of the cover sheet to fit the wearer's buttocks can be more smoothly moved and extended, and as a result, the above-described function of the cover sheet can be more effectively achieved. In addition, the absorbent article of the present aspect has a non-elongation region (a front side non-elongation region) extending in a widthwise direction at a portion on the front side of a portion where the cover sheet and the low friction member overlap in the thickness direction. Therefore, it is possible to ensure a certain strength against the above-described biasing force at the portion on the front side of the cover sheet, and it is more difficult to cause the cover sheet to contract or tear in the longitudinal direction as described above.

According to still another aspect of the present invention, in the absorbent article of any of the aspects 1 to 6, the absorbent article has two of the wide side directions of the cover sheet. Each of the end portions is overlapped in the thickness direction, and a pair of side-side joint portions of the cover sheet and the main portion are joined, and each of the pair of side-side joint portions has a position a first joint portion extending in the longitudinal direction and a second joint portion extending in the longitudinal direction and extending in the longitudinal direction of the outer side in the longitudinal direction The front end edge of the joint portion is overlapped with the front end edge of the cover sheet in the thickness direction, and the front end edge of the second joint portion is located further rearward than the front end edge of the cover sheet. .

In the absorbent article according to the seventh aspect, since the cover sheet is joined to the main portion by the pair of side-side joint portions of the specific form described above, the cover sheet is not joined to the absorbent portion by the main portion. When a biasing force is applied to the longitudinal direction of the article, the front side portion of the second joint portion, which is the portion where the stress is most likely to concentrate, allows the stress applied to the front side portion to escape (distribution to other portions), and can further It is not easy to tear the cover sheet, and the cover sheet can be more firmly fixed to the main portion by the first joint portion on the outer side in the width direction than the second joint portion described above. Thereby, the absorbent article of the present aspect is capable of stably exhibiting the above-described cover sheet for a longer period of time.

According to a still further aspect of the present invention, in the aspect of the aspect of the aspect of the aspect of the aspect of the present invention, a pair of side sheets on the skin facing surface side of the surface sheet, wherein each of the pair of side sheets and the both sides of the cover sheet in the width direction are by the pair The side-side joint portions are respectively joined, and on the other hand, each of the pair of side sheets and the front side of the front sheet are separated by a predetermined distance from the outer side joint portions. The joining is performed on the outer side in the side in the width direction of the pair of side joint portions.

In the absorbent article of the eighth aspect, the pair of side sheets are bonded to the cover sheet and the top sheet, and the side side joint portions of the pair of side sheets and the joint portion of the cover sheet, and as one The outer side joint portions of the pair of side sheets and the surface sheet are separated from each other, so that the portion separated by the same (that is, the portion between the side side joint portion and the outer side joint portion) exists. In addition, it is possible to allow a region in which the cover sheet is moved and extended in the longitudinal direction (hereinafter referred to as "the activity of covering the sheet"), and the cover sheet is raised from the pair of side sheets. The surface sheet floats and is displaced. Therefore, in the absorbent article of the present aspect, even when the above-described biasing force is applied, the portion between the side-side joint portion and the outer-side joint portion of the pair of side sheets is relaxed. The force is moved to move and elongate while the cover sheet is smooth and does fit the wearer's buttocks.

According to still another aspect of the invention, in the absorbent article according to any one of the aspects 1 to 8, the cover sheet is a rear side end extending in the width direction. The first portion, the wide-side direction central region, and the wide-side second region in which the rear end portion is divided into three in the width direction, and the cover sheet is in the width direction The first region and the second region in the wide side direction are joined to one of the surface sheets, and are not joined to the surface sheet or only a part of the surface sheet in the central portion in the width direction.

In the absorbent article according to the aspect 9, the rear end portion of the cover sheet is joined to the surface sheet in the above-described specific form, so that the movement of the cover sheet can be sufficiently ensured in the central portion in the widthwise direction, and The first region in the wide side direction and the second region in the wide side direction can restrict the movement of the cover sheet within a predetermined range, and the cover sheet does not excessively move and elongate in the longitudinal direction. As a result, the absorbent article of the present aspect is less likely to form a state in which the cover sheet is less likely to be restored due to excessive movement and elongation (for example, a state in which wrinkles are strongly concentrated), and the function of the cover sheet can be more reliably exhibited.

According to still another aspect of the invention, in the absorbent article of any of the aspects 1 to 9, the absorbent article has at least one of the absorbent articles folded in the widthwise direction. In the fold line extending in the longitudinal direction of the article, the strength holding portion is overlapped with the fold line.

In the absorbent article according to the aspect 10, since the strength holding portion of the cover sheet is overlapped with the fold line for folding the absorbent article in the widthwise direction, the above-described strength holding portion is provided with a folding habit that extends in the longitudinal direction. The cover sheet is further less likely to be in a state in which wrinkles are concentrated.

According to still another aspect of the invention, in the aspect of the aspect of the aspect of the aspect of the aspect of the aspect of the aspect of The skin facing surface side extends from the front region to the rear region; and the absorbent sheet is located on the skin facing surface side of the absorbent body in the center of the longitudinal direction of the absorbent article. The central axis in the longitudinal direction extending in the width direction is located further on the rear side, and extends in the longitudinal direction across the front end edge of the cover sheet in the longitudinal direction.

In the absorbent article of the present aspect 11, in addition to the absorbent body, since the absorbent sheet disposed at the specific position is further provided, even if the excretion liquid is repeatedly supplied from the wearer, the absorbent article can be used. The absorbent body and the absorbent sheet absorb the excretion liquid that flows toward the rear side in the longitudinal direction of the absorbent article in a stepwise manner. Therefore, in the absorbent article of the present aspect, the wearer's buttocks are less likely to be wetted by the excretion liquid, and further, since the cover sheet can be prevented from being wetted by the excretion liquid, the strength is lowered, and the above-mentioned effect can be exerted for a longer period of time. The effect of the effect. [Effects of the Invention]

According to the present invention, it is possible to provide an absorbent article which is less likely to cause an uncomfortable feeling to the wearer even when the biasing force is applied over a long period of time, and which is less likely to cause skin diseases such as acne.

Hereinafter, a suitable embodiment of the absorbent article of the present invention will be described in detail with reference to the drawings. In addition, in the present specification, it is placed in a state in which it is viewed from the upper side in the vertical direction (the surface of the absorbent article in the case of the surface sheet) in the thickness direction of the object. The object on the horizontal surface (for example, an absorbent article, a surface sheet, a cover sheet, an absorber, a low-friction member, etc.) is called "looking down."

The various directions and the like used in the present specification are as follows, unless otherwise specified. In the present specification, the term "longitudinal direction" means "the direction in which the length of the vertically long object (for example, an absorbent article or an absorbent body) is long", and the "wide side direction" means " The direction in which the length of the vertically long object in the plan view is short (short side direction), and the "thickness direction" means "the vertical direction of the object placed on the horizontal surface with respect to the expanded state". The longitudinal direction, the broad side direction, and the thickness direction are orthogonal to each other. In the present specification, the "surface direction" means a plane extending direction of a substantially flaky object (for example, an absorbent article, a surface sheet, an absorbent body, a low friction member, a cover sheet, etc.) in a plan view ( That is, the horizontal direction), the plane direction and the thickness direction are orthogonal to each other. In the present specification, the longitudinal direction of the object in the longitudinal direction is located in the center of the longitudinal direction of the object, and the central axis C _W in the longitudinal direction extending in the direction of the broad side. The relative proximal side is called the "inner side in the long side direction" or the "inside side in the long side direction", and the longitudinal direction of the longitudinally long object is the center axis C _W with respect to the longitudinal direction. The relative far side is called "the outer side in the long side direction" or the "outside side in the long side direction". Similarly, the "longitudinal direction of the broad side of the object, the position in the widthwise direction of the center of the object, with respect to the broadside direction of the longitudinal direction of the central axis C _L extending in the opposite proximal end". referred to as "the widthwise direction of the inner side" or "broadside direction inner side direction", the "longitudinal direction of the broad side of the object with respect to the width direction of the central axis C _L of the opposite side of the distal It is called "the outer side in the wide side direction" or "the outer side in the wide side direction". In addition, in the thickness direction of the absorbent article, the "opposite side of the wearer's skin surface when wearing the absorbent article" is called "skin-opposed" in the thickness direction of the absorbent article. In the "face side", the "relative side of the skin of the wearer when wearing the absorbent article" is referred to as "non-skin facing side". Here, the term "wearing" refers to a period during which the wearer wears the absorbent article (that is, a period in which the usable state is formed) (the period of wearing). In addition, in the present specification, the surface of the skin facing surface side and the non-skin opposing surface side of various members (for example, a surface sheet, an absorbent body, a low friction member, and a cover sheet) constituting the absorbent article The "surface" is only referred to as "skin facing surface" and "non-skin facing surface".

Fig. 1 is a plan view of a urine absorbing pad 1 (absorbent article) according to an embodiment of the present invention viewed from a surface sheet side in a thickness direction T in an unfolded state, and Figs. 2 and 3 are respectively taken along a urine absorbing state. A cross-sectional view of a cross section taken along line II-II and line III-III of Fig. 1 in the spacer 1. 4 is a plan view of the cover sheet 3 used in the urine absorbing pad 1, and FIG. 5 is an enlarged plan view of a main portion of the cover sheet 3 shown in FIG. 6 and 7 are cross-sectional views along the line VI-VI and VII-VII of Fig. 5 in the cover sheet 3, respectively.

As shown in Fig. 1, a urine absorbing pad 1 according to an embodiment of the present invention has a vertically long outer shape having a longitudinal direction L and a broad side direction W, and further has a long length. The substantially central portion of the side direction L is formed in a substantially hourglass shape having a narrowed shape toward the inner side in the widthwise direction W. Further, in the present invention, the outer shape of the absorbent article is not limited to such a shape, and any long shape in which the length dimension in the longitudinal direction L is longer than the width dimension in the widthwise direction W can be used for any purpose. Shape (for example, rectangle, oval, gourd, etc.).

As shown in Fig. 1, the urine absorbing pad 1 of the present embodiment has a front side area A _F corresponding to the wearer's abdomen (more specifically, the lower abdomen) when worn in the longitudinal direction L. The center area A _C corresponding to the wearer's crotch portion (more specifically, the crotch portion) and the rear region A _B corresponding to the wearer's back (more specifically, the buttocks) when worn This order. In the present specification, the "relative side of the wearer's abdomen when wearing the absorbent article" is referred to as the "front side" in the longitudinal direction of the absorbent article, and the "absorbent article" is referred to as "absorbent article". The relative proximal side of the wearer's back relative to the wearer is referred to as the "rear side".

Absorbing urine pad 1, is shown in FIG. 2 and FIG. 3, there is in the thickness direction T includes: the main portion 2, comprising: a liquid urine-absorbent pad located in the opposite side skin sheet S 1 ₁ permeable a surface sheet 21, position 22, position in which the non-skin facing side S of the absorbent member 22 ₂ of the sheet 23 to the surface of the sheet non-skin facing surface of the side S of the liquid-absorbent absorbent body of ₂ 21, the suction A pair of side sheets of the skin sheet facing side S ₁ of the surface sheet 21 (specifically, the side of the end portion on the one side in the width direction W) The sheet 24 and the side sheet 25) disposed at the other end of the widthwise direction W, and the liquid-impermeable leakage preventing sheet 26 positioned between the absorbent body 22 and the back sheet 23; in the rear area A _B a sheet-like low friction member 4 positioned on the skin facing surface side S ₁ of the surface sheet 21; a cover sheet 3 positioned on the skin facing surface side S ₁ of the low friction member 4 in the rear region A _B ; at the absorber 22 the skin facing surface S ₁ side than the longitudinal center axis is located closer to the rear side C _W S _B, and L in the longitudinal direction across the front of the cover sheet 3 side end edge extending presence absorbent 3E _F 8 sheets. Further, the pair of side sheets 24 and 25 are the end portions of the inner side in the width direction W when the urine absorbing pad 1 is worn as shown in FIGS. 1 and 2 (also In other words, the inner side end portion 24R of the side sheet 24 in the width direction and the inner side end portion 25L of the side sheet 25 in the width direction are formed by the contraction of the elastic member 27 such as the thread rubber provided at the end portion. The leakage preventing wall portion 28 for preventing leakage of excretion liquid such as urine can be formed.

The urine absorbing pad 1 of the present embodiment includes a rear region A _B of the wearer's buttocks which is likely to cause skin diseases such as acne or rash, and is located on the skin facing surface side S ₁ of the surface sheet 21. a low-friction member 4, and a cover sheet 3 positioned on the skin-facing side of the low-friction member 4 and partially joined with respect to the main portion 2, and further, the cover sheet 3 is as shown in FIG. The both end portions 3E _L and 3E _{R of the} side direction W are respectively joined to the pair of side sheets 24 and 25 of the main portion 2 described above, and are detachable from the pair of side sheets 24 and 25 from the surface sheet 21 The skin opposing surface of the low friction member 4 is floated apart. Thereby, the urine absorbing pad 1 is made to have a frictional resistance between the cover sheet 3 and the surface sheet 21 by the adhesion of the low friction member 4 and the covering sheet 3, so that the cover sheet 3 is opposed to the surface sheet. 21 becomes relatively easy to move in the direction of the face.

Further, in the present embodiment, the cover sheet 3 has an elongated region 32 which is extensible in the longitudinal direction L as shown in Figs. 1, 2, and 4 to 7, and has a longitudinal direction in the elongated region 32. A plurality of strength holding portions 31 extending L. Further, in the present embodiment, as shown in FIG. 4, there are seven intensity holding portions 31 which are extended in the longitudinal direction L and are arranged at predetermined intervals in the widthwise direction W. Furthermore, elongated region 32, as is described later, in the thickness direction T of the urine absorbing pad 1 sheet protrudes toward the opposing skin surface S ₁ side, and extends towards the direction of the continuous sheet width direction of the urine absorbing pad 1 is W The ridge portion 32A and the groove portion that is recessed in the thickness direction T of the urine absorbing pad 1 toward the non-skin opposing surface side S ₂ and continuously extend in the direction of the width direction W of the urine absorbing pad 1 32B includes an elongate portion having a concavo-convex structure that is disposed to overlap each other along the longitudinal direction L of the urine absorbing pad 1. The concavo-convex structure of such an elongate portion is formed by a gear forming process as a non-woven fabric that serves as a base material of the cover sheet 3. It is formed, so the relative intensity becomes low. On the other hand, the strength holding portion 31 is compressed or not subjected to gear shaping processing or the like in the thickness direction T, and therefore has strength (rigidity) equal to or higher than the strength of the nonwoven fabric covering the base material of the sheet 3, and is higher than the above-described elongation. The part is relatively more intense. Thereto, FIG. 9 (a), is a schematic showing of the wearer (not shown) after the wearing state of the present embodiment of the urine absorbing pad sheet (state without applying a biasing force F _Z) is an explanatory view, FIG. 9(b) is an explanatory view schematically showing a state in which the biasing force F _Z is applied to the urine absorbing pad 1 from its state.

As described above, since the urine absorbing pad 1 of the present embodiment has the elongated region 32 in which the cover sheet 3 is stretchable in the longitudinal direction L, the shape (body shape) of the stretched region 32 following the wearer's skin surface can be accurately adhered. . Therefore, the urine absorbing pad 1 is a movement of the wearer's buttocks 3 to fit the wearer's buttocks even when the wearer is moving, because it can be accurately faced with the wearer's skin. Since the direction is moved and stretched, it is difficult to impart physical stimulation to the wearer's skin due to friction or offset force. In addition, since the urine absorbing pad 1 has the strength holding portion 31 that extends in the longitudinal direction L in the extended region 32 of the cover sheet 3, when the urine absorbing pad 1 applies the biasing force in the longitudinal direction L, In addition, it is not easy to be in the state in which the plurality of wrinkles W _R as shown in FIG. 9( b ) are contracted in the longitudinal direction L, and the biasing force is assumed to be due to the biasing force. When the extended region 32 of the cover sheet 3 is contracted in the longitudinal direction L as described above, the original state can be easily restored to the original state shown in Fig. 9(a). Thereby, the urine absorbing pad 1 can fully exhibit the intended function of the cover sheet 3 described above even if the biasing force is applied over a long period of time (that is, the so-called cover sheet 3 is engaged with the wearer's buttocks). It is easy to move and stretch, and it is not easy to cause friction and distracting force to cause physical stimulation. As a result, it is not easy for the wearer to feel uncomfortable, and it is not easy to cause skin diseases such as hemorrhoids. ,deterioration.

Hereinafter, various components constituting the absorbent article of the present invention will be described in more detail using the urine absorbing pad 1 of the above-described embodiment.

<Main portion> In the urine absorbing pad 1 of the above-described embodiment, the main portion 2 includes liquid permeation on the skin facing surface side S ₁ of the urine absorbing pad 1 as shown in Figs. 1 to 3 . surface of the sheet of 21; located in the surface of the sheet non-skin of the liquid-absorbent facing side S ₂ of the absorbent body 22 is 21 bits in which the absorbent body non-skin facing side S 22 ₂ of the sheet 23; both end portions in the sheet width direction of the urine absorbing pad 1 of the sheet W, 24, 25 _a pair of side surfaces facing the skin side sheet S 21; and 23 in place between the absorbent sheet member 22 and the inside The liquid-impermeable leakage preventing sheet 26 serves as a basic structure.

In the present specification, the term "the both ends in the width direction" refers to the end of one of the wide sides of the object (for example, an absorbent article, a main portion, a cover sheet, etc.) and the other side. In the "end portion of the side", the "end portion in the width direction" means "the edge in the width direction of the object (the edge on the outer side in the width direction), and from the end A portion of a predetermined range in which the inner side of the rim width direction extends (that is, a portion in which the length in the widthwise direction is within 15% of the entire length of the wide side). Further, the same applies to the end portions in other directions (for example, the end portions in the longitudinal direction).

Further, the main portion described above is a portion that maintains the basic function (i.e., absorption performance, etc.) of the absorbent article, and its constituent elements differ depending on the type of the absorbent article. Therefore, for example, when the surface sheet has a predetermined absorption property, the main portion may not contain the absorbent body, and in the case of ensuring leakproofness, the main portion may not contain the side sheet.

Next, in the present invention, various members that can constitute the main portion of the absorbent article will be described in detail.

[Surface Sheet] In the urine absorbing pad 1 of the above-described embodiment, the surface sheet 21 is disposed as shown in FIGS. 1 to 3 except that the cover sheet 3 and the low friction member 4 are overlapped in the thickness direction T. the position of the wearer's skin can immediately contact (i.e., a urine-absorbent pad sheet position facing the skin side S _1), and by the excretions discharged from the wearer can be composed of a liquid permeable sheet through .

As shown in FIG. 1 to FIG. 3, the surface sheet 21 covers the substantially entire longitudinal direction L and the broad side direction of the absorber 22 disposed on the non-skin opposing surface side S ₂ of the surface sheet 21 in plan view. W extends and has a vertically long substantially rectangular outer shape that is long in the direction along the longitudinal direction L of the urine absorbing pad 1. Further, in the absorbent article of the present invention, the outer shape of the surface sheet is not limited to such a shape, and the surface of the skin facing surface of the absorbent body can be covered without being exposed at least in the central region, and various applications and the like can be employed. Any shape and size.

In the present invention, the liquid permeable sheet which can be used as the surface sheet is not particularly limited as long as it has predetermined liquid permeability and skin feel, and for example, cellulose fibers and thermoplasticity can be used. Any non-woven fabric such as a spunbonded nonwoven fabric, a hot air non-woven fabric, or an SMS nonwoven fabric formed of a resin fiber or the like.

In addition, the basis weight and the thickness of the liquid-permeable sheet (non-woven fabric, etc.) which can be used as the surface sheet are not particularly limited, and the liquid permeability, the skin feel, and the like can be considered in consideration of the effect of the present invention. The basis weight and the thickness of any of the excretion liquids are not likely to occur, and the surface sheet is preferably a liquid transmissive sheet having a relatively large thickness.

Further, in the present invention, the structure of the surface sheet is not particularly limited as long as it has predetermined liquid permeability and skin feel, and even if the general nonwoven fabric has a substantially flat structure, it has a ridge structure or the like. In addition, it is preferable that the surface sheet is formed using a concavo-convex structure having a ridge structure or the like from the point that it is less likely to cause the occurrence or deterioration of skin diseases such as acne. For example, the ridge portion that protrudes toward the skin-facing surface side in the thickness direction of the absorbent article and extends continuously in the direction along the longitudinal direction of the absorbent article, and The thickness direction of the absorbent article is recessed toward the non-skin opposing surface side, and the groove portion continuously extending in the direction along the longitudinal direction of the absorbent article is alternately arranged in the width direction of the absorbent article. The ridge groove structure and so on. If the surface sheet has such a concavo-convex structure, since the surface area of the surface sheet and the wearer's skin and the cover sheet can be reduced, the cover sheet is easily moved and stretched, and further, it is less likely to be absorbed by the absorber. The excretion liquid and the moisture thereof come into contact with the wearer's skin, and the wearer feels a damp state, a stuffy state, or a wearer's skin becomes wet.

Further, the direction in which the ridge portion and the groove portion are extended in the above-described ridge structure is not particularly limited, and the ridge portion and the groove portion may extend in any direction such as the width direction of the absorbent article. Further, the internal structure of the ridge portion is not particularly limited, and the ridge portion may have a hollow internal structure (that is, a structure in which the cross-sectional structure in a direction orthogonal to the direction in which the ridge portion extends and the direction perpendicular to the ridge portion is substantially wavy). It can also have a solid internal structure.

The method of imparting the above-described uneven structure to the surface sheet is not particularly limited, and for example, a method of continuously blowing a gas (for example, air) to the fiber web, an arbitrary forming method such as a compression forming method, a gear rolling method, or the like can be employed. .

Moreover, in the present invention, the surface sheet may be joined to the non-skin opposing surface of the pair of side sheets positioned on the skin facing surface side, or may be joined to the skin facing surface or the non-skin opposing surface of the absorbent body. It can also be joined to the skin facing surface of the leak-proof sheet or the inner sheet. Further, the joining method is not particularly limited, and any joining means such as a hot melt type adhesive or hot melt can be used.

[Absorbent Body] Next, an absorbent body which can be used for the absorbent article of the present invention will be described. In the urine absorbing pad 1 of the above-described embodiment, the absorbent body 22 is composed of an absorbent member as shown in Figs. 1 to 3, and is disposed on the surface sheet 21 in the thickness direction T of the urine absorbing pad 1. The inner sheet 23 (more specifically, the leak-preventing sheet 26) absorbs and holds the wearer's excretion liquid that has passed through the surface sheet 21.

The absorbent body 22, is shown in Figure 1, in a plan view of the front region A _F 1 (specifically, the vicinity of the longitudinal direction L of the front-side edge 1A) A _B across from the rear region urine-absorbent pad sheet (particularly In the vicinity of the one side end 縁 of the side wall 宽 in the wide side direction W of the urine absorbing pad 1 , the other side end 跨 in the wide side direction W is extended. Extendingly, it is formed long in the direction along the longitudinal direction L of the urine absorbing pad 1, and has a substantially central portion in which the substantially central portion in the longitudinal direction L is narrowed toward the inner side in the wide-side direction W. Shape shape. Further, in the present invention, the outer shape of the absorbent body is not limited to such an aspect, and any shape such as a rectangular shape or an oblong shape may be used as long as it exhibits a predetermined absorption performance.

Moreover, a plan view is disposed on the position of the absorbent body comprises an absorbent article comprising long broadside direction of the longitudinal direction of the central axis C L extending in the longitudinal direction of the intersection of _L and _W toward the center axis C extending in the widthwise direction W The position of the central portion is not particularly limited. For example, the absorbent body may be disposed on the other hand in the longitudinal direction of the absorbent article.

In the present invention, the absorbent member which can be used as the absorbent body is not particularly limited as long as it can absorb and retain the excretion liquid such as urine, and any absorbent member known in the art can be used. An example of such an absorbent member is a core-clad sheet such as a hydrophilic tissue paper, which covers an absorbent core made of an absorbent material to be described later. Here, the absorbent material constituting the absorbent core may, for example, be a hydrophilic fiber or a superabsorbent polymer, and more specifically, a cellulose system such as pulverized pulp, cotton, crepe or acetate. a fiber; a granule formed of a superabsorbent polymer such as a sodium acrylate copolymer; and a mixture of any of these combinations.

Further, in the present invention, the absorbent body may be composed of an absorbent member having a multilayer structure in which two or more absorbent layers are laminated in the thickness direction. In this case, each of the absorbing layers may be composed of an absorbent member of the same composition or may be composed of an absorbent member having a different composition. Further, the outer shape (the shape in plan view) and the size of each of the absorbing layers may be the same or different from each other.

Further, the basis weight and thickness of the entire absorbent body are not particularly limited as long as the effects of the present invention are not inhibited, and any basis weight and thickness in consideration of desired absorption performance, flexibility, and the like can be employed.

Further, in the present invention, in addition to the above-described absorbent body, an absorbent sheet which complements the absorbent property of the absorbent body is further provided. Such an absorbent sheet will be described later.

[Inner Sheet] Next, the inside sheet which can be used in the absorbent article of the present invention will be described. In the urine absorbing pad 1 of the above-described embodiment, the inner sheet 23 is composed of a hydrophobic non-woven fabric or a liquid-impermeable sheet as shown in FIGS. 1 to 3, and is disposed in the thickness direction of the urine absorbing pad 1. The non-skin opposing surface side S ₂ in the T has a predetermined air permeability and also prevents the permeation of urine or the like discharged from the wearer, so that the excretion liquid does not leak to the outside (for example, wearing The user wears clothing and the like to function.

As shown in FIGS. 1 to 3, the inner sheet 23 extends over the rear side edge 1B from the front side edge 1A in the longitudinal direction L of the urine absorbing pad 1 in a plan view, and is sucked from the urine absorbing pad. One of the side ends of the wide side direction W in one of the first side ends extends across the other side end, and has an approximately trapezoidal outer shape similarly to the outer shape of the urine absorbing pad 1. Further, in the present invention, the outer shape of the inner sheet is not limited to such a shape, and the surface of the non-skin opposing surface of the absorbent body disposed on the skin-facing side of the inner sheet is not exposed. Any shape and size of the application.

In the present invention, the hydrophobic nonwoven fabric which can be used as the inner sheet is not particularly limited as long as it has predetermined hydrophobicity, gas permeability, and the like, and for example, a spunbonded nonwoven fabric, a dot-bonded non-woven fabric, a melt-blown non-woven fabric, and an SMS non-woven fabric can be used. (Non-woven fabric formed of three or more layers (for example, a five-layer structure) including each of the nonwoven layer of the spunbond layer/meltblown layer/spun layer); any hydrophobic non-woven fabric such as hot air non-woven fabric. In such a hydrophobic non-woven fabric, when the absorbent article is provided with a leakage preventing sheet between the inner sheet and the absorbent body, it is not necessary to have liquid impermeability, and in particular, the absorbent article is not provided between the inner sheet and the absorbent body. When leakproof sheets are used, it is desirable to use liquid imperviousness.

Further, the constituent fibers of the hydrophobic nonwoven fabric are not particularly limited, and for example, polyolefin fibers such as polyethylene or polypropylene; polyester fibers such as polyethylene terephthalate; and core-sheath type composite fibers can be used. A thermoplastic resin fiber such as various composite fibers. In addition, the basis weight and thickness of the hydrophobic nonwoven fabric are not particularly limited as long as the effects of the present invention are not inhibited, and any basis weight and thickness in consideration of gas permeability and the like can be employed.

On the other hand, the liquid-impermeable sheet which can be used as the inner sheet is not particularly limited as long as it has a predetermined liquid impermeability. For example, any plastic film formed of a thermoplastic resin such as polyethylene can be used. Liquid impervious sheet. Such a liquid-impermeable sheet is preferably one having a liquid impermeability and a certain gas permeability (for example, a plastic film having a plurality of openings).

Further, in the above-described embodiment, the urine absorbing pad 1 is provided with a liquid impervious leak preventing sheet 26 between the back sheet 23 and the absorber 22. The leakage preventing sheet 26 is made of a plastic film made of a thermoplastic resin such as polyethylene, and prevents the permeation of urine or the like discharged from the wearer, so that the excretion liquid does not leak to the outside. Play the function. When such a leakage preventing sheet is provided, it is not necessary for the absorbent article of the present invention, and if the absorbent article is provided with a leakage preventing sheet, leakage of excretion liquid such as urine can be more effectively suppressed.

Further, in the present invention, the position at which the leakage preventing sheet is disposed is not particularly limited as long as it can exhibit the function of the leakage preventing sheet, and the leakage preventing sheet can also extend from the front region of the absorbent article to the rear region as in the above embodiment. It is configured to be disposed only in a specific area such as a central area.

[Side Sheet] Next, a pair of side sheets which can be used in the absorbent article of the present invention will be described. In the urine absorbing pad 1 of the above-described embodiment, the pair of side sheets 24 and 25 are disposed on the skin facing surface side S _{1 of the} surface sheet 21 as shown in Figs. 1 to 3, and are arranged to be sucked. The strip-shaped side sheet 24 at one end portion of the urine pad 1 in the widthwise direction W and the strip-shaped side portion disposed at the other end in the width direction W of the urine absorbing pad 1 The side sheets 25 are formed. As shown in FIG. 1, the side sheet 24 on the one side and the side sheet 25 on the other side are viewed from the front side edge 1A of the longitudinal direction L of the urine absorbing pad 1 in the plan view. 1B is extended, and as shown in FIG. 2, the outer side end portion 24L of the side sheet 24 on the outer side in the width direction W and the outer side end portion 25R of the side sheet 25 in the width direction are provided. The one end side and the other side end portion of the leakage preventing sheet 26 are joined to each other to form a fixed end, and the side of the side sheet 24 located on the inner side in the width direction W is widened. The inner side end portion 24R and the wide side inner side end portion 25L of the side sheet 25 are not joined to any member to form a free end.

In addition, when the absorbent article does not include the above-described leakage preventing sheet, the pair of side sheets are joined to one end portion (one side end portion 23L of the above-described embodiment) and the other side of the inner sheet in the width direction. Side end portion (the other side end portion 23R of the above-described embodiment).

Moreover, in the above-described embodiment, each of the side sheets 24 on the one side in the widthwise direction W and the side sheets 25 on the other side are the inner side ends in the widthwise direction as shown in Figs. 1 and 3 . In the vicinity of the 24R and in the vicinity of the inner side end portion 25L in the wide side direction, the side sheets 24 and the side sheets 25 are respectively contracted in the longitudinal direction L so as to be adjacent to the inner side end portions 24R in the broad side direction. 25L elastic member 27 for standing up. By the contraction of the elastic member 27, the inner side end portions 24R and 25L of the side sheets 24 and the side sheets 25 in the respective widthwise directions are raised to form leakage preventing leakage of urine or the like in the widthwise direction. Leakproof wall portion 28.

In the present embodiment, as shown in FIG. 1, the elastic member 27 is disposed in a wide range from the front region A _F in the longitudinal direction L of the urine absorbing pad 1 across the rear region A _B , but is in the present invention. The configuration of the elastic member is not particularly limited. For example, the elastic member may be disposed in the longitudinal direction of the pair of side sheets, and may be disposed in the vicinity of the front side edge and the rear side in the longitudinal direction of the pair of side sheets as in the above-described embodiment. Within the predetermined range near the edge. Further, when the elastic member is disposed as in the latter, there is an advantage that the end portion in the longitudinal direction of the absorbent article is not easily warped.

In the present invention, the expansion ratio when the elastic member is attached to the pair of side sheets is not particularly limited as long as the cover sheet is not excessively stretched and the leakage of the excretion liquid is less likely to occur, and such elongation ratio is relatively limited. The natural length of the elastic member is, for example, in the range of 1.3 to 3.0 times, preferably in the range of 1.5 to 2.5 times, more preferably in the range of 1.7 to 2.3 times. Further, in the above-described embodiment, the elastic member 27 is disposed in each of the inner side end portion 24R of the side sheet 24 in the width direction and the inner side end portion 25L of the side sheet 25 in the width direction. According to the invention, the arrangement of the elastic members is not limited to two or more of the pair of side sheets. In addition, as the elastic member, a silk rubber or the like which is generally used can be used for an absorbent article such as a urine absorbing pad or a disposable diaper.

Further, in the above-described embodiment, the pair of side sheets 24 and 25 have a long and long strip-shaped outer shape liquid in the longitudinal direction L of the urine absorbing pad 1 as shown in Fig. 1 . In the present invention, the pair of side sheets are not limited by such a shape, and any shape and size of the liquid may be employed as long as a predetermined leak-proof wall portion can be formed. Transmissive sheet.

The strip-shaped liquid-impermeable sheet which can be used as the side sheet is not particularly limited as long as it has predetermined liquid impermeability, flexibility, and the like, and for example, a hydrophobic non-woven fabric (for example, having hydrophobicity or imparting hydrophobicity) can be used. a spunbonded nonwoven fabric, a dot-bonded nonwoven fabric, a spunbond layer/meltblown layer/spunbond layer (SMS) nonwoven fabric, a liquid-impermeable synthetic resin film, and any liquid such as the laminate. Impervious sheet.

Further, the basis weight and thickness of the strip-shaped liquid-impermeable sheet (for example, a hydrophobic nonwoven fabric) which can be used as the side sheet are not particularly limited as long as the effects of the present invention are not impaired, and it is possible to take into consideration the desired one. Any basis weight and thickness such as liquid impermeability and flexibility.

Further, such a side sheet is not required for the absorbent article of the present invention, and the absorbent article may have such a side sheet, particularly in the width direction of the absorbent article, in addition to being more effective. In addition to the leakage of the excretory liquid such as urine, since the cover sheet is joined, as described above, the cover sheet has an advantage that it is easy to move relative to the surface sheet with respect to the surface sheet.

Hereinafter, in the present invention, various members (that is, a cover sheet, a low friction member, and an absorbent sheet) constituting the absorbent article other than the main portion described above will be described in detail.

<Cover Sheet> In the urine absorbing pad 1 of the above-described embodiment, the cover sheet 3 is in the rear region A _{B of the} urine absorbing pad 1 and the thickness of the low friction member 4 as shown in Figs. 1 , 2 and 4 . The direction T is repeated on the skin facing surface side S _{1 of} the low friction member 4, and is disposed so as to include the entire low friction member 4 in a plan view so that the low friction member 4 is not exposed (that is, in the cover sheet) 3 is disposed between the surface sheet 21 and the low friction member 4). By arranging the cover sheet 3 in this manner, the frictional resistance between the cover sheet 3 and the surface sheet 21 can be further reduced, and the cover sheet 3 can be relatively easily moved in the surface direction with respect to the surface sheet 21.

Moreover, the cover sheet 3 has a substantially rectangular outer shape having a length in the longitudinal direction L in plan view, and the substantially rectangular outer shape has a predetermined longitudinal direction along the longitudinal direction L of the urine absorbing pad 1. The length (for example, 150 mm to 250 mm) and the predetermined width in the width direction W along the width direction W of the urine absorbing pad 1 (for example, 100 mm to 200 mm). Further, in the present invention, the outer shape of the cover sheet is not particularly limited as long as it does not impede the effects of the present invention, and any outer shape (for example, a circular shape, an elliptical shape, a polygonal shape, or the like) may be employed.

In the present invention, the material constituting the cover sheet is not particularly limited, and for example, a non-woven fabric such as a hot air non-woven fabric, a spunbonded nonwoven fabric, a woven fabric, a knitted fabric, a plastic film or the like may be used, and such a sheet-like member may be Any of hydrophilic or hydrophobic. Since the cover sheet used in the present invention can directly contact the skin of the wearer, it is preferable that the sheet-like member described above is a sheet-like member which is excellent in softness and softness. Examples of such a sheet-like member include non-woven fabrics such as hot air non-woven fabrics and spunbonded nonwoven fabrics. Further, the sheet-like member constituting the cover sheet is preferably one which is excellent in hydrophobicity from the point where it is difficult to wet the wearer's skin (specifically, the skin of the buttocks). Further, even if a hydrophilic material is used as the sheet-like member forming the cover sheet, since the excretion liquid such as urine and the moisture thereof can be transmitted to some extent, it is difficult to cover between the wearer's skin and the cover sheet. The excretion of urine and the like, and the advantage of its moisture.

Moreover, in the present invention, the cover sheet is formed by a sheet-like member which is extensible in at least one direction (that is, a direction corresponding to the longitudinal direction of the absorbent article), specifically, an extensible sheet. Forming a member having an extensible elongated region at least in a direction corresponding to a longitudinal direction of the absorbent article, and having a direction extending in a direction of a longitudinal direction of the corresponding absorbent article in the elongated region 1 or a plurality of strength holding portions. Further, in the above-described embodiment, the cover sheet 3 has an elongated region 32 which is extensible in the longitudinal direction L of the urine absorbing pad 1 as shown in Figs. 1 and 4, and a suction pad in the elongated region 32. The longitudinal direction direction L of the sheet 1 is extended, and the seven strength holding portions 31 which are arranged at predetermined intervals in the widthwise direction W are separated. When the cover sheet is formed of such an extensible sheet-like member, since the above-mentioned elongated region can accurately follow the shape of the wearer's body, even if the wearer moves in the wearing of the absorbent article In addition, the above-mentioned cover sheet can be moved and extended in the surface direction with the wearer's skin with high precision, and the wearer's skin is less likely to be rubbed or biased. Physical stimulation. Further, since the cover sheet has one or a plurality of strength holding portions extending in the longitudinal direction in the above-described elongated region, when the absorbent article is biased in the longitudinal direction, the above-described elongated region is less likely to become In the state in which the longitudinal direction L shown in FIG. 9(b) is contracted, it is assumed that the above-described offset force is applied over a long period of time, and the extended region of the cover sheet is in a contracted state in the longitudinal direction. The original state as shown in Fig. 9(a) is restored. Therefore, in the absorbent article of the present invention, by providing such a specific stretchable cover sheet, even if the biasing force is applied over a long period of time, the desired function of the cover sheet can be sufficiently exhibited (that is, the so-called function) The cover sheet is moved and even stretched in conjunction with the wearer's buttocks, and the wearer's skin is not easily imparted with the function of physical stimulation caused by friction or offset force. As a result, the wearer is less likely to feel uncomfortable. It is also less likely to cause the occurrence and deterioration of skin diseases such as acne.

Here, in the present specification, "extensible" means that the object is oriented in the opposite predetermined two directions in accordance with the method described in "6.3 Tensile Strength and Elongation" of JIS L 1913:2010 (that is, at least toward When the length is 55%, the length (100%) of the object in the natural direction (that is, the state before stretching) is not broken, and the length (100%) of the object in the natural state (that is, the state before stretching) is extended by 3% or more. The case (that is, the elongation after the elongation is 103% or more).

Further, in the present invention, the direction of elongation in the extended region of the cover sheet may be at least in a direction other than the direction corresponding to the longitudinal direction of the absorbent article (for example, a direction corresponding to the width direction). elongation. Since the direction of elongation of the cover sheet is multi-directional, the cover sheet can be more accurately followed the shape of the wearer's body.

Further, the elongation region of the above-mentioned cover sheet is long as it extends toward at least the direction corresponding to the longitudinal direction of the absorbent article, and the cover sheet shrinks even after stretching regardless of the shrinkage after stretching (except by the elastic member) In addition to the stretchability, the external force generated by the action of the buttocks of the wearer may be extended and contracted.) However, the external force generated by the action of the buttocks of the wearer may be almost Will not shrink.

The extensible sheet-like member which can be used for the cover sheet is not particularly limited as long as it can be elongated in at least one direction (longitudinal direction of the absorbent article), and can be suitably used, for example, on the wide side of the absorbent article. A non-woven fabric or a woven fabric having a concavo-convex structure in which the ridge portions and the groove portions which are continuously extended in the direction are alternately arranged in the longitudinal direction; and a non-woven fabric in which elastic members such as elastic fibers are disposed along the longitudinal direction of the absorbent article Or a woven fabric; and a laminate of any such combination. Among them, the non-woven fabric having the above-described uneven structure is extensible not only in the region having the uneven structure, but also because the contact area with the wearer's skin is small and the physical stimulation to the skin is small, so that it is particularly preferable as the cover sheet. usage of.

Further, in the above-described embodiment, the extended region 32 of the cover sheet 3 includes two ends extending in the longitudinal direction L and extending at both end portions in the longitudinal direction W as shown in FIGS. 4 and 5 . The extension portion on the side (specifically, the end portion side extension portion 32L on the one side in the width direction W and the end portion side extension portion 32R on the other side), and the W side in the width direction are on the end portions side Six inner side extension portions 32C extending between the extension portions and extending in the longitudinal direction L; and seven strength holding portions 31 extending between the respective extension portions and extending in the longitudinal direction L .

As shown in FIGS. 6 and 7 , each of the end side extension portions 32L and 32R and the inner side extension portion 32C protrudes toward the skin facing surface side S ₁ in the thickness direction T of the urine absorbing pad ₁ . The ridge portion 32A that continuously extends in the widthwise direction W and the groove portion 32B that is recessed toward the non-skin opposing surface side S ₂ in the thickness direction T and continuously extend in the widthwise direction W have the long side The specific concave-convex structure in which the directions L are alternately arranged alternately. Further, the interval between the ridge portions 32A arranged in the longitudinal direction L (that is, the distance between the vertices of the ridge portions arranged in the longitudinal direction) is not particularly limited, and the desired extensibility and skin contact can be adopted. Any interval such as sensation (for example, an interval in the range of 1 mm to 10 mm, etc.).

Further, in the above-described end side extension portions 32L, 32R, the ridge portion 32A has a length in the width direction as shown in FIG. 5, and contacts the widthwise end edges 32E _L , 32E _R of the extension region 32. the first ridge portion. 32A _1; and broadside direction length relatively short, elongated and not the contact area 32 of the widthwise direction end edges 32E _L, 32E _R of the second ridge portion _2. 32A, the first ridge portion of such The 32A ₁ and the second ridge portions 32A ₂ are alternately arranged in the longitudinal direction L across the groove portion 32B as shown in FIG. 5 . Here, the length of the ridge portion 32A (including the first ridge portion 32A ₁ ) and the groove portion 32B in the width direction is not particularly limited, and any length corresponding to desired elongation, skin feel, or the like can be employed. (for example, the length in the range of 5 mm to 50 mm, etc.), and the difference in the length in the width direction of the first ridge portion 32A ₁ and the second ridge portion 32A ₂ is not particularly limited, for example, 1 mm to 5 mm. In the range. Further, in FIG. 5, the specific form of the side end portion 32R of the elongated portion, i.e., indicates the widthwise direction outer side end portion of the wide side direction. 32A _a first ridge portion 32A _1E elongated region 32 in contact with end edge 32E _R The end portion 32A _2E on the outer side in the width direction of the _second ridge portion 32A ₂ is located further on the inner side in the width direction W than the width edge 32E _{R of the} extended region 32.

Elongate side stretched region of the end portion 32R 32 having such a configuration, if a particular portion of the first ridge and the second ridge. 32A ₁ part 32A _2, by the above-described first convex portion side in the widthwise direction. 32A ₁ W is as wide as possible to ensure the extended region 32 of the cover sheet 3, and also by the end portion 32A _2E on the outer side in the width direction of the _second ridge portion 32A _{2 and} the wide-side end edge 32E _{R of the} elongated portion 32. In the case of the non-shaped portion of the uneven structure (hereinafter referred to as "the non-shaped portion on the outer side in the width direction of the second ridge portion"), a certain strength can be secured. Even if the biasing force is applied over a long period of time, the tearing of the cover sheet is less likely to occur, and the function of the cover sheet can be more reliably and stably exhibited.

Further, in the present invention, the end portion side extension portion having the specific first ridge portion and the second ridge portion may be disposed only at one end portion in the width direction of the extension region (at this time, The other end portion and the inner side extension portion have the same length in the width direction as the end portion side extension portion having a constant ridge portion and the groove portion. However, it is equally ensured from the vicinity of both end portions in the width direction. At the point of the strength of the sheet, the end portion side extension portion having the specific first ridge portion and the second ridge portion is disposed at both end portions in the width direction of the extension region.

In the present embodiment, the ridge portion 32A and the groove portion 32B have a substantially zigzag-like uneven shape in the cross-sectional shape along the longitudinal direction L as shown in FIG. 6. However, in the present invention, the ridge portion is provided. The specific shape of the groove portion is not limited to the shape having the above-described uneven shape as long as the cover sheet can be provided with at least the elongation in the longitudinal direction. The ridge portion and the groove portion can be, for example, along the longitudinal direction. The cross-sectional shape is an arbitrary shape such as a substantially wave shape.

In the above-described embodiment, the ridge portion 32A and the groove portion 32B of each of the extending portions of the cover sheet 3 are substantially flat non-woven fabrics which are the base material of the cover sheet 3, and are formed by gear shaping. A predetermined portion where the ridge portion 32A and the groove portion 32B are formed is pressed from both sides in the thickness direction T to be formed. Further, at the time of the gear forming process, the portions between the respective elongating portions are simultaneously pressed or not pressed from both sides in the thickness direction T, so as to be formed substantially in the center in the thickness direction T as shown in Figs. 6 and 7 . Strength holding portion 31. Therefore, the strength holding portion 31 does not have the uneven structure such as the above-described ridge portion 32A and the groove portion 32B, and the strength holding portion 31 is one surface in the thickness direction T as shown in Figs. 6 and 7 . Each of the surface (the surface 31a on the skin facing surface side) and the surface (the surface 31b on the non-skin side surface side) on the other side are formed substantially flat. In addition, the length in the width direction of the strength holding portion 31 is not particularly limited as long as the effect of the present invention can be achieved. For example, an arbitrary length such as a length in the range of 1 mm to 10 mm can be employed, and the strength holding portion 31 can be used. The height of the skin-facing surface 31a to the apex of the ridge portion 32A is not particularly limited, and any height corresponding to desired elongation, skin feel, and the like can be employed (for example, a range of 0.1 mm to 2 mm). The height inside, etc.).

Further, in the elongated region 32 thus formed, the rib portion 32A and the groove portion 32B are pressed and stretched in the thickness direction T, and the strength (rigidity) is relatively low. In the strength holding portion 31, the nonwoven fabric which is the base material is pressed in the thickness direction T and compressed, or the nonwoven fabric which is the base material is not pressed in the thickness direction T, and the strength is maintained, and the strength (rigidity) can be relatively increased. Becomes high. Therefore, in the urine absorbing pad 1 of the present embodiment, since the strength holding portion 31 having a relatively high relative strength extends in the longitudinal direction L in the extended region 32 of the cover sheet 3, the long side is applied to the urine absorbing pad 1. direction L when the biasing force of the cover sheet than the stretched state region 3 due to the strength of the holding portion 31 becomes easy to FIG. 9 (b) shown a plurality of such aggregated wrinkles W _R toward the longitudinal direction L of 32 contraction in addition, When the biasing force is applied over a long period of time, the extended region 32 of the cover sheet 3 is contracted in the longitudinal direction L, and the original state as shown in FIG. 9(a) can be easily restored. Thereby, even if the biasing force is applied over a long period of time, the urine absorbing pad 1 can fully exhibit the intended function of the cover sheet 3 (that is, the movement of the cover sheet 3 in cooperation with the wearer's buttocks and Elongation, it is not easy to cause friction on the wearer's skin, and the function of physical stimulation caused by the biasing force). As a result, it is difficult for the wearer to feel uncomfortable, and it is not easy to cause skin diseases such as acne. .

Here, in the present specification, the strength holding portion refers to a portion having a higher relative strength (rigidity) than the elongated portion in the elongated region, and the specific strength is not particularly limited. Further, the comparison of the strength of the strength holding portion and the extension portion can be performed, for example, in the following manner. First, a sample for measurement of a predetermined size having the same structure as the strength holding portion and the elongated portion is produced, and a tensile tester (Shimadzu Corporation) having a weight sensor having a maximum load capacity of 50 N is used for each sample for measurement. Manufactured by the company, the autostereoscopic chart type AGS-1kNG), the tensile strength is measured under the same conditions (for example, the distance between clamps of 100 mm, the tensile speed of 100 mm/min, etc.), and the strength of the two can be compared. . Further, the direction in which the tensile strength is measured is the direction corresponding to the longitudinal direction of the absorbent article.

Further, in the present invention, the structure of the strength holding portion in the extended region of the cover sheet is not particularly limited as long as the strength in at least the longitudinal direction of the elongation portion of the strength holding portion can be ensured to some extent, and the strength holding portion is, for example, a concavo-convex structure having a smaller uneven structure than the ridge portion and the groove portion described above; and a laminated structure having a strength-reinforcing member (for example, a belt-shaped non-woven fabric, a sheet, or the like) adhered to a predetermined portion of the base material; a compression constructor having a predetermined portion that compresses the substrate under heating or non-heating; a melt constructor having a predetermined portion of the substrate melted under pressure or without pressure; or any combination of such constructors .

Further, in the above-described embodiment, the strength holding portion 31 of the cover sheet 3 is continuous from the front side edge 32E _F in the longitudinal direction L of the extension region 32 to the rear side edge 32E _B as shown in Fig. 4 . The sexual extension is configured to exist. The strength holding portion 31 of the cover sheet 3 extends from the front side edge 32E _{F of the} extension region 32 to the rear side edge 32E _{B in} this manner, because the function of the above-described strength holding portion 31 can be made to be long in the elongated region 32. Since the entire direction L is exerted, the urine absorbing pad 1 having such a structure can more reliably exhibit the function of the cover sheet 3 described above.

Further, as shown in FIG. 4, each of the both ends 3E _L and 3E _R in the width direction W has a side-side non-elongation region extending in the longitudinal direction L (FIG. 4). The side side non-elongation area 33L on the one side in the width direction W and the side side non-elongation area 33R on the other side, and the side side non-elongation areas 33L and 33R are also the same as the above-described strength holding unit 31. Each of the surface having the skin facing surface side and the surface opposite to the skin surface has a substantially flat structure and has relatively high strength.

Further, as shown in FIG. 1, the urine absorbing pad 1 of the present embodiment has two fold lines extending in the longitudinal direction L for folding the urine absorbing pad 1 in the width direction W (see FIG. The line L ₁ on one side in the width direction W and the line L ₂ on the other side in the width direction in which the center axis line C _L in the width direction is sandwiched is sandwiched between the strength holding portions 31 of the sheet 3 The broken lines L ₁ and L _{2 are} repeatedly arranged. When the strength holding portion 31 of the cover sheet 3 is overlapped with the fold lines L ₁ and L ₂ extending in the longitudinal direction L of the urine absorbing pad ₁ , the strength holding portion 31 is provided with a folding habit extending in the longitudinal direction L. The cover sheet 3 can be further prevented from becoming a state in which wrinkles are concentrated.

Further, in the present invention, the number of the fold lines for folding the absorbent article in the widthwise direction is not particularly limited as long as the effect of the present invention is not inhibited, and a desired package form or the like corresponding to the absorbent article can be used. Any number of bars (for example, 1, 4, etc.).

Moreover, the arrangement form of the extended region in the cover sheet (for example, the number of each of the extended portion and the strength holding portion, the arrangement position, the length in the longitudinal direction of the extended portion, and the length in the widthwise direction) does not impede the effects of the present invention. There is no particular limitation in the case, and any configuration can be adopted. For example, in the modification of the cover sheet which can be used in the present invention, the cover sheet 3' shown in Fig. 8 can be mentioned. In addition, the structure other than the structure different from the cover sheet 3 of the above-described embodiment of FIG. 8 is basically the same as the cover sheet 3 described above, and thus the description thereof will be omitted. The cover sheet as shown in FIG. 8 3 'having in a plan view than the cover sheet is disposed on the 3' side of the non-skin facing surface S ₂ of the low-friction member 4 in the longitudinal direction L of the front side edge 4E _F The front side non-elongation region 34 is further extended in the front side S _F and continuously extending in the width direction W. If the cover sheet 3' has such a non-elongation region (the front side non-elongation region 34), since a portion of the front side S _F of the cover sheet 3' can be secured against a certain strength of the above-described offset force, it is possible to Further, it is less likely that the cover sheet 3' shrinks or tears in the longitudinal direction L due to wrinkles.

Further, in the present invention, the ratio of the elongation region to the cover sheet is not particularly limited as long as the effect of the present invention can be attained. For example, when the elongation region is formed by the above-described uneven structure, the plan view area of the elongation region is relative to the cover sheet. The overall viewing area of the viewing area is over 50% in the range of 100% or less.

Further, in the above-described embodiment, as shown in FIG. 1 and FIG. 2, the cover sheet 3 is joined to one of the side edges 3E _L in the width direction W in the width direction of the side sheet 24 on the one side. The inner side portion 24S of the square side end portion 24R, and the other end portion 3E _R of the other side in the widthwise direction W are joined to the inner side in the width direction of the side sheet 25 on the other side. The inner side portion 25S of the end portion 25L. The joining of the cover sheet 3 and the side sheets 24, 25 is performed from the front side edge 3E _F in the longitudinal direction L of the cover sheet 3 across the rear side edge as shown in Fig. 1, and is formed toward the long side. The pair of side-side joint portions 5 and 5 that extend in the direction L (more specifically, the first joint portion 51 that is positioned on the outer side in the widthwise direction W and the inner side that is positioned in the widthwise direction W Second joint portion 52). Further, in the present embodiment, the cover sheet 3 does not extend to both end portions in the width direction W of the urine absorbing pad 1.

In this manner, the cover sheet 3 is joined to the pair of side sheets 24 and 25 having a large degree of freedom in the movement of the leakage preventing wall portion 28, the surface sheet 21 having a small degree of freedom of movement, the absorber 22, and the leakage preventing sheet 26, The member of the inner sheet 23 or the like is not directly fixed, so that it is difficult to restrict the movement of the cover sheet 3, but it is joined to the side sheet having a large degree of freedom of movement, and the cover sheet 3 is opposed to the surface sheet 21 of the urine absorbing pad 1. Easy to move. Further, when the pair of side sheets 24, 25 joined to the cover sheet 3 are worn by the urine absorbing pad 1, the inner side end portions 24R, 25L in the respective broad side directions are erected to form the leakage preventing wall portion 28. Therefore, when the rising side of the sheet pair 24 and 25, joined at the side of the sheet pair 24 and 25 of the cover sheet 321, the low-friction member 4 toward the opposing skin surface S ₁ side of the float from the surface of the sheet The frictional resistance between the cover sheet 3 and the low friction member 4 is further less likely to occur.

Further, a part of the bonding of the cover sheet 3 and the side sheets 24 and 25 described above is performed on the side side non-elongation regions 33L and 33R located at both end portions 3E _L and 3E _R of the cover sheet 3 in the width direction W. In the peripheral portion of the joint portion (that is, the first joint portion 51 of the side joint portions 5 and 5), when the biasing force is applied in the longitudinal direction L of the urine absorbing pad 1, the stress tends to concentrate. In the peripheral portion, since the predetermined strength is ensured by being positioned in the side non-elongation regions 33L and 33R of the cover sheet 3, even in the longitudinal direction L of the urine absorbing pad 1 When the force is applied over a long period of time, the tearing of the cover sheet 3 is less likely to occur, and the function of the cover sheet 3 described above can be exhibited more stably. As a result, the urine absorbing pad 1 of the present embodiment can achieve the above-described effects more stably for a longer period of time (that is, there is a so-called skin disease that is less likely to cause discomfort to the wearer and acne. And the effect of deterioration is not easy to cause).

Further, a part of the bonding of the cover sheet 3 and the side sheets 24 and 25 described above is viewed in a plan view, and is widened in the width direction of the first ridge portion 32A ₁ of the end portion side extension portions 32L and 32R of the cover sheet 3 . The outer end portion 32A _{1E is} repeated, and the region that is not overlapped with the second ridge portion 32A ₂ is also performed, and the joint portion (that is, the second joint portion 52 of the side joint portions 5 and 5) The peripheral portion also has a portion where stress is easily concentrated when a biasing force is applied to the longitudinal direction L of the urine absorbing pad 1, and the peripheral portion is located outside the widthwise direction including the _second ridge portion 32A ₂ described above. Since a certain strength is ensured in the region of the non-shaped portion on the square side, even when the above-described biasing force of the urine absorbing pad 1 is applied over a long period of time, the tearing of the cover sheet 3 is less likely to occur, and it is more reliable. The function of the cover sheet 3 described above is stably exerted.

Further, in the above-described embodiment, the first ridge portion 32A ₁ and the second ridge portion 32A ₂ of the end portion side extension portions 32L and 32R of the cover sheet 3 are alternately overlapped in the longitudinal direction L via the groove portion 32B. In this way, the non-shaped portions located on the outer side in the width direction of the _second ridge portion 32A ₂ are formed along the longitudinal direction L of the cover sheet 3 at regular intervals, and can be covered. The longitudinal direction L of the sheet 3 is further stably secured against the above-described biasing force.

Further, each of both end portions 3E _L and 3E _R in the widthwise direction W of the cover sheet 3 is repeated in the thickness direction T, and the pair of side faces of the cover sheet 3 and the pair of side sheets 24, 25 are joined. Each of the side joint portions 5 and 5 has the first joint portion 51 that extends in the longitudinal direction L and the inner side that is positioned in the widthwise direction W as described above. The second joining portion 52 extending in the longitudinal direction L may be the front side of the first joining portion 51 as shown in FIGS. 4 and 5 . The side edge 51E _F and the front side edge 3E _{F of the} cover sheet 3 are repeated in the thickness direction T, and the front side edge 52E _{F of} the second joint portion 52 is located further rearward than the front side edge 3E _{F of the} cover sheet 3 S _B is configured. Here, the specific position of the front side edge 52E _F of the second joining portion 52 is not particularly limited, and may be, for example, in a range of 1 mm to 50 mm from the front side edge 3E _{F of} the cover sheet 3 toward the rear side. Further, in the present embodiment, the rear side edge 51E _{B of the} first joining portion 51 and the rear side edge 52E _{B of the} second joining portion 52 are overlapped with the rear end edge of the cover sheet 3 in the thickness direction T. When the cover sheet 3 is applied to the cover sheet 3 by the first joint portion 51 and the second joint portion 52 and the side sheets 24 and 25 in such a specific arrangement, the portion where the stress is most concentrated by the stress is applied. The front side portion of the second joint portion 52 is not joined to the side sheets 24 and 25, and the stress applied to the front side portion is detached (distributed to other portions), and the cover sheet 3 can be further hardly torn. Further, The cover sheet 3 can be more firmly fixed to the side sheets 24 and 25 by the first joint portion 51 on the outer side in the widthwise direction than the second joint portion 52 described above. As a result, the urine absorbing pad 1 of the present embodiment is capable of stably exhibiting the above-described cover sheet 3 for a longer period of time.

Further, each of the pair of side sheets 24 and 25 and the both end portions 21L and 21R of the front sheet 21 in the width direction W are formed by the side of the pair as described above. The joint portions 5, 5 are respectively joined to the outer side joint portions 6L, 6R which are separated by a predetermined distance on the outer side in the width direction W, respectively. Thus, the side side joint portions 5, 5 as the joint portions of the pair of side sheets 24, 25 and the cover sheet 3; and the joint portion of each of the pair of side sheets 24, 25 and the surface sheet 21 The outer side joint portions 6L, 6R are separated from each other by the separated portions 24D, 25D (that is, the side side joint portions 5, 5 and the outer side joint portions of the pair of side sheets 24, 25) The presence of a portion between 6L and 6R ensures the movement and elongation of the cover sheet 3 in the longitudinal direction L (i.e., the mobility of the cover sheet), when a pair of side sheets 24, 25 When standing up, the cover sheet 3 can be displaced from the surface sheet 21 by floating. Therefore, the urine absorbing pad 1 of the present embodiment is a side joint portion 5, 5 and an outer side joint portion of the pair of side sheets 24 and 25 even when the above-described biasing force is applied. The portions 24D and 25D between the 6L and the 6R alleviate the biasing force, and the cover sheet 3 can be moved and extended by the action of the smoothness of the cover sheet 3 and the wearer's buttocks.

Further, the lengths and arrangement intervals of the joint portions (that is, the first joint portion 51, the second joint portion 52, and the outer joint portions 6L, 6R) are not particularly limited as long as the effects of the present invention are not inhibited. The limitation may be any length (for example, a length in a range of 1 mm to 20 mm) and an arrangement interval corresponding to a desired joint strength or the like (for example, the arrangement interval between the first joint portion and the second joint portion is 1 mm). In the range of 10 mm, the arrangement interval between the side-side joint portion and the outer-side joint portion is in the range of 5 mm to 50 mm, and the like.

Further, in the present invention, if the cover sheet is not restricted in operation, it may be directly fixed to the main portion other than the side sheet described above instead of being joined to the side sheet or the side sheet. . That is, the cover sheet can be joined with respect to the various member portions constituting the main portion without restricting the action. For example, the cover sheet can be sufficiently bent without being restricted in its operation to the extent that drapability can be formed, and can be joined to the main portion of the absorbent article (more specifically, joined to the surface sheet, the inner sheet).

For example, in the above-described embodiment, the cover sheet 3 has a rear side end portion 3E _B extending in the widthwise direction W as shown in Fig. 4, and has the rear side end portion 3E _B divided into three in the widthwise direction W. The first region 3E _B1 in the wide-side direction, the central region 3E _{BC in the} broad direction, and the second region 3E _B2 in the wide-side direction are equally divided, and the cover sheet 3 is in the central portion in the broad direction of the central portion 3E _BC in the broad side direction (and portion other than the part of the central axis _L of the repeated broadside direction C) on the surface of the sheet 21 is engaged. More specifically, the rear side end portion 3E _{B of the} cover sheet 3 is a rear side first joint portion extending from the wide side first region 3E _B1 across the width direction central portion 3E _BC as shown in FIG. 4 . 71. The rear side second joining portion 72 which extends from the wide side second region 3E _B2 across the wide side direction central portion 3E _BC is joined to the skin facing surface of the top sheet 21, and includes the wide side. A portion of the central portion in the widthwise direction of the central portion of the direction is not joined to the surface sheet 21.

Further, in the present invention, the joining form of the rear end portion of the cover sheet and the front sheet is not limited to the above-described embodiment, and for example, the cover sheet is in the first region and the wide side direction in the widthwise direction of the rear end portion. Each of the two regions may be joined to the surface sheet in the central portion in the broad side direction as long as it is partially or entirely joined to the skin-facing surface of the surface sheet, or may be joined to the surface sheet.

When the rear end portion of the cover sheet is joined to the surface sheet in such a specific form, the movement of the cover sheet can be sufficiently ensured in the central portion in the widthwise direction described above, and the first region and the width in the wide side direction are wide. In the second direction in the side direction, the movement of the cover sheet can be restricted within a predetermined range, so that the cover sheet does not excessively move and elongate in the longitudinal direction. As a result, the absorbent article having such a structure is less likely to form a state in which the cover sheet is less likely to be restored due to excessive movement and elongation (for example, a state in which wrinkles are strongly concentrated), and the function of the cover sheet can be more reliably exhibited.

In addition, the size of each of the rear side joint portions (the rear side first joint portion and the rear side second joint portion) is not particularly limited. For example, the length of each of the rear side joint portions in the longitudinal direction is in the range of 10 mm to 30 mm. The length in the width direction is in the range of 5 mm to 40 mm.

In the present invention, each of the joint portions (that is, the side joint portion (first joint portion, second joint portion), the outer side joint portion, the rear side first joint portion, and the rear side second joint portion) The bonding method is not particularly limited as long as the effects of the present invention are not impeded, and any bonding method using a hot-melt adhesive or hot-melt can be employed.

Further, in the above-described embodiment, the cover sheet 3 is disposed only in the vicinity of the buttocks of the wearer (especially in the vicinity of the sacrum) which is likely to cause skin diseases such as acne and rash, and is disposed only behind the urine absorbing pad 1. In the region A _B , the absorbent article of the present invention is not limited to such an arrangement, and the cover sheet can be disposed not only in the rear region but also in a region of the front region and a part of the central region where the skin disease may occur.

Further, in the above-described embodiment, as shown in FIG. 1, the cover sheet 3 is disposed such that the rear side end portion 3E _{B of the} cover sheet 3 extends to the rear side edge 1B of the urine absorbing pad 1. It is preferable that the cover sheet is not an essential component in the absorbent article of the present invention, and the cover sheet is preferably a position that extends to the rear side of the possible limit of the absorbent article. If the cover sheet is extended to such a position, the above-mentioned skin disease can be more less likely to occur because the wearer's buttocks which are prone to skin diseases are more widely covered.

Further, the size of the cover sheet is not particularly limited as long as the effect of the present invention can be achieved. For example, the length of the cover sheet in the longitudinal direction is in the range of 25% to 100% of the length in the longitudinal direction of the rear region, and is preferably 30. In the range of %~80%, it is more desirable to be in the range of 40%~70%. Further, when the outer shape of the cover sheet is a shape other than a rectangular shape, the length in the longitudinal direction indicates the maximum length in the longitudinal direction of the shape. On the other hand, the length of the cover sheet in the widthwise direction is considered to be a range in which the skin disease is likely to occur, and the excretion liquid is easily leaked. For example, in the range of 50 mm to 250 mm, preferably in the range of 80 mm to 200 mm, it is more preferable. It is in the range of 100mm~180mm. Further, when the outer shape of the cover sheet is a shape other than a rectangular shape, the length in the width direction indicates the maximum length in the wide side direction of the shape.

<Low Friction Member> In the urine absorbing pad 1 of the above-described embodiment, the low friction member 4 is disposed on the surface sheet 21 in the rear region A _{B of the} urine absorbing pad 1 as shown in FIGS. 1 and 2 . 3 between the cover sheet, and can reduce by being arranged on the skin side S facing cover sheet of _a low friction against the sheet-like friction member 3 is constituted between.

Moreover, the low friction member 4 has a substantially rectangular outer shape in a plan view, and the substantially rectangular outer shape has a predetermined longitudinal length along the longitudinal direction L of the urine absorbing pad 1 (for example, 100 mm~) 200 mm), and a predetermined width in the width direction along the width direction W of the urine absorbing pad 1 (for example, 50 mm to 150 mm). Further, in the present invention, the outer shape of the low friction member is not limited to such an aspect, and any shape (for example, a circular shape, an elliptical shape, or the like) may be employed as long as the frictional resistance with the above-mentioned cover sheet can be reduced. Angle, etc.) and size. In addition, the low-friction member may be composed of one sheet-like member as in the above-described embodiment, or may be composed of a plurality of sheet-like members that are divided into at least one of a longitudinal direction and a broad side direction. In this case, the plurality of sheet-like members constituting the low-friction member are disposed at a predetermined interval apart from at least one of the longitudinal direction and the wide-side direction, and it is easy to ensure that the plurality of sheet-like members are disposed as described above. Liquid permeability and air permeability.

In the present invention, the sheet-like member which can be used as the low friction member is not particularly limited as long as it can reduce the friction against the above-mentioned cover sheet. For example, an olefin resin such as polyethylene or polypropylene can be used. a resin-made sheet-like member formed of a resin or a resin composition having a low coefficient of friction such as a fluororesin such as an anthracene resin or a polytetrafluoroethylene; or an olefin-based resin such as polyethylene or polypropylene, or polyethylene terephthalate At least one surface of the base sheet formed of a general-purpose thermoplastic resin such as a polyester resin such as an alcohol ester or a thermoplastic resin composition (the surface on the side opposite to the skin in the absorbent article) is covered. A coated sheet-like member of a low-friction material having a low friction coefficient such as a resin or a fluororesin. Further, in the present specification, the sheet-like member and the base sheet include a porous structure having a plurality of openings and a concave-convex structure having a plurality of convex portions and concave portions, in addition to a sheet and a film having a thin and flat structure. A sheet having an arbitrary structure such as a fiber sheet such as a woven fabric, a non-woven fabric, or a braid; and a sheet-like structure of any form such as a laminated sheet arbitrarily combined.

When the resin-made sheet-like member is used as the low-friction member, it is preferable that such a resin-made sheet-like member contains high-density polyethylene (HDPE) in a ratio of 50% by mass or more, and 50/50 to 75/25. The mass within the range is more desirable than those containing high density polyethylene (HDPE) and low density polyethylene (LDPE). When the low-friction member is formed of a resin-made sheet-like member containing a high-density polyethylene having a ratio of 50% by mass or more, the low-friction member has a certain hardness or more due to the high-density polyethylene component, and can be made to have a low frictional resistance. member. Further, the resin-made sheet-like member forming the low-friction member contains high-density polyethylene and low-density polyethylene in a mass ratio in the range of 50/50 to 75/25 because it can be made of a soft low-density polyethylene component. By reducing stress (that is, internal residual stress) remaining in the inside of the sheet-like member when the sheet-like member is formed of the resin material, the sheet-like member (in particular, the end portion in the width direction of the sheet-like member) is used The relaxation of the internal residual stress suppresses the rounding (that is, curling). Therefore, the absorbent article having such a resin-made sheet-like member as the low-friction member is provided, and since the above-mentioned cover sheet can be more smoothly moved on the low-friction member, it is more difficult to impart to the wearer's skin. Physical stimulation caused by friction and offset forces.

In the present specification, high density polyethylene, refers to a density of 0.942 g / cm ³ or more polyethylene, low density polyethylene, refers to a density of 0.910 g / cm ³ or more is less than 0.930 g / cm ³ of polyethylene.

In addition, when the above-mentioned coated sheet-like member is used as the low-friction member, at least one of the base sheet formed of the above-mentioned general-purpose thermoplastic resin or thermoplastic resin composition is used as the low-friction member. The surface can be obtained by coating a low friction material such as ruthenium resin in a predetermined amount (for example, an amount in the range of about 0.6 g/m ² to 0.8 g/m ² ). Further, when a ruthenium resin is used as the low friction material, the form of the ruthenium resin is not particularly limited, and any of a solvent system, a solventless system, or a latex type may be used. Further, the hardening type of the ruthenium resin may be used. There is no particular limitation, and any type of enamel resin of a thermosetting type or an ultraviolet curing type can be used. However, when a plastic film formed of the above-mentioned general-purpose thermoplastic resin or thermoplastic resin composition is used as a base sheet, when the base resin is cured by heating, the base sheet is deformed and melted, so that it is used. An ultraviolet curable resin is preferred. Further, the method of applying the low friction material is not particularly limited, and any coating method such as a spray method, a roll method, or a dipping method may be employed.

In addition, the low-friction member is not particularly limited as long as it has low friction which can reduce frictional resistance with the cover sheet disposed on the skin-facing surface side, and any of the above-described sheet-like members may be employed. The structure (for example, at least one elongated rod-shaped member, at least one strip-shaped member, etc.), in consideration of the point where the low-friction region can be widely ensured, and the slidability of the cover sheet in the surface of the low-friction member (surface orientation) It is preferable to use a sheet-like member having a substantially flat structure as a whole in the above-described embodiment as the flexibility of the entire absorbent article or the like.

Moreover, the sheet-like member which can be used as the low-friction member is not limited to the one having the substantially flat structure as described above in the above embodiment, and such a sheet-like member is, for example, both ends in the width direction of the absorbent article. The part is warped toward the opposite side of the skin (that is, displaced). When both end portions in the width direction of the sheet-like member forming the low friction member are displaced toward the skin facing surface side, the end portion displaced toward the skin facing surface side is placed on the skin positioned on the low friction member The cover sheet on the opposite side is pressed against the wearer's skin, and the cover sheet can more accurately follow the wearer's skin.

Further, in the present invention, the static friction coefficient of the surface of the low friction member (at least the surface on the skin facing surface side) can be ensured in the surface direction together with the wearer's skin as long as the above-mentioned cover sheet can be ensured to fit the wearer's movement. The ease of sliding of the degree of movement is not particularly limited, and is, for example, in the range of 0.04 to 0.80, preferably in the range of 0.10 to 0.50, and more preferably in the range of 0.10 to 0.40. In addition, the kinetic friction coefficient of the surface of the low-friction member is also not particularly limited as long as the above-described cover sheet can be adjusted to fit the wearer's movement, and the slidability of the wearer can be moved in the surface direction together with the wearer's skin. For example, in the range of 0.10 to 0.75, it is preferably in the range of 0.10 to 0.55, more preferably in the range of 0.10 to 0.45.

In addition, the static friction coefficient and the dynamic friction coefficient can be measured in accordance with JIS P8147 (b) horizontal method. For the measurement of the static friction coefficient and the dynamic friction coefficient, a friction cotton cloth "blend No. 3 (canequim No. 3)" specified in JIS L0803 is used as a test piece for a horizontal plate, and a low friction member is used as a weight. Use test strips.

In the present invention, the low friction member is disposed even in a completely repeated manner in the thickness direction with the cover sheet (that is, the low friction member and the cover sheet have the same plan view area), and the low friction member is covered in plan view to include the cover sheet. In order to ensure the skin feel, liquid permeability, air permeability, and the like, the low friction member is preferably placed at a position overlapping the cover sheet in the thickness direction, and is disposed to be narrower than the cover sheet. . In this case, it is preferable that the low-friction member has a plan view area in which the low-friction member is not exposed even when the cover sheet is moved in the surface direction. For example, the plan view area of the low-friction member is viewed from the top of the cover sheet. In the range of 10% to 80% of the area, the ideal is in the range of 20% to 60%, and more preferably in the range of 25% to 50%.

Further, the position at which the low-friction member is disposed is not particularly limited as long as it is overlapped with the cover sheet in plan view, and is preferably substantially at the center of the cover sheet. In addition, when the absorbent article has a fold line extending in the width direction for the absorbent article in a state in which it is folded in the longitudinal direction, the low friction member is preferably placed in a position that does not overlap the fold line in plan view. When the low friction member is disposed at a position that does not overlap with such a fold line, since the low friction member is not provided with a folding habit extending in the width direction, it is particularly easy to face the long side direction of the cover sheet. The ease of movement allows the absorbent article to be folded into a tight state in the longitudinal direction and stored in a packaging bag or the like.

Further, the thickness of the low friction member is not particularly limited as long as it does not impede the effects of the present invention, and any thickness (for example, a thickness in the range of 0.01 mm to 1.0 mm) in consideration of flexibility, strength, and the like can be employed. The thickness of the low-friction member can be measured by using a non-contact type measuring instrument such as a laser displacement meter or by amplifying the observation section by using a scanning electron microscope or the like. Further, the thickness of the low-friction member takes into account the influence of the measurement error, etc., and the average of the measured values of the arbitrary arbitrary five places is employed.

Further, the low friction member described above is preferably joined to the surface sheet by any bonding means such as a hot melt type adhesive. In the one of the longitudinal direction and the wide side direction of the absorbent article, the bonding means may be applied intermittently or intermittently, and when the bonding means is applied intermittently, it is easy to ensure the air permeability and the absorbent article. The sultry inside is not easy to produce.

Further, when the low friction member has a plurality of opening portions penetrating in the thickness direction, the surface sheet and the low friction member are low-viscosity adhesives having a measured value of 0.78 N or less via a probe test, and are at least partially Engagement is ideal. The surface sheet and the low friction member having the plurality of openings are at least partially joined by such a low-adhesive adhesive because the low-viscosity adhesive is not separated from the skin by the opening portion of the low-friction member Since the cover sheet on the cover side is joined to fix the low friction member to the surface sheet, the cover sheet can be more stably moved while suppressing positional deviation, peeling, and the like of the low friction member. Further, the measurement value of the probe test can be measured using any test device of a probe type (for example, a viscosity tester manufactured by RHESCA Co., Ltd., Japan).

Further, in the absorbent article of the present invention, since the above-described low friction member is not essential, the absorbent article of the present invention may not have the above-described lowness when the above-described movement and elongation of the cover sheet can be secured. Friction member.

<Absorbent sheet> In the urine absorbing pad 1 of the above-described embodiment, the absorbent sheet 8 is longer than the skin-facing surface side S _{1 of the} absorbent body 22 as shown in Fig. ₁ . The side direction central axis C _W is located further on the rear side S _B , and the front side edge 3E _F of the cover sheet 3 described above is disposed across the longitudinal direction L.

When the absorbent article further includes an absorbent sheet disposed at the specific position in addition to the absorbent body, the absorbent body and the absorbent sheet can be staged by the absorbent body even if the excretion liquid is repeatedly supplied from the wearer. The excretion liquid that flows toward the rear side in the longitudinal direction of the absorbent article is absorbed. Therefore, in the absorbent article including such an absorbent sheet, the wearer's buttocks are less likely to be wetted by the excretion liquid, and further, the cover sheet can be prevented from being wetted by the excretion liquid, and the strength may be lowered.

Moreover, in the above-described embodiment, as shown in FIG. 1, the absorbent sheet 8 has a substantially rectangular outer shape having a long side direction L in plan view, and the outer shape has a shape from the urine absorbing pad 1. The central area A _C extends in a predetermined longitudinal direction length (for example, 100 mm to 200 mm) extending across the rear area A _B ; and a predetermined width direction length in which the majority of the absorbent body 22 extends over the wide side direction W (for example, 100mm~200mm). Further, in the present invention, the outer shape of the absorbent sheet is not limited to such an aspect, and any shape (for example, a circular shape, an elliptical shape, a polygonal shape, or the like) corresponding to a desired absorption performance or the like may be employed.

In the present invention, the absorbent sheet is not particularly limited as long as it contains a sheet-like member of a superabsorbent polymer. For example, a coated sheet such as a hydrophilic paper sheet may be used as a superabsorbent polymer such as a sodium acrylate copolymer. . Further, the absorbent sheet may contain the same absorbent material as the above-described absorbent body in addition to the superabsorbent polymer.

Further, the basis weight and thickness of the absorbent sheet are not particularly limited as long as the effects of the present invention are not inhibited, and any basis weight and thickness in consideration of desired absorption properties, flexibility, and the like can be employed.

In addition to the urine absorbing pad of the above-described embodiment, the present invention can be applied to, for example, various types of absorbent articles such as (light) incontinence pads and disposable disposable diapers. Further, the absorbent article of the present invention is not limited to the above-described embodiments, the modifications, and the like, and may be appropriately combined, replaced, changed, or the like without departing from the spirit and scope of the invention. In addition, in this specification, the ordinal number of "1st", "2nd", etc. is used to distinguish the item to which the ordinal number is given, not the order, priority, importance, etc. of each item.

1‧‧‧Urine suction pad (absorbent article)

2‧‧‧ Main Department

21‧‧‧Surface

22‧‧‧Acceptor

23‧‧‧ inside sheet

24‧‧‧ side sheet (one side)

25‧‧‧ side sheet (the other side)

26‧‧‧ leakproof sheets

27‧‧‧Flexible components

28‧‧‧Leakproof wall

3‧‧‧ Covering sheets

31‧‧‧Strengthkeeping Department

32‧‧‧Elongation area

32L‧‧‧End side extension (one side)

32R‧‧‧End side extension (the other side)

32C‧‧‧Inside extension

32A‧‧‧Bars

32A ₁ ‧‧‧1st rib

32A ₂ ‧‧‧2nd rib

32B‧‧‧ Groove

33L‧‧‧Side side non-elongation area (one side)

33R‧‧‧Side side non-elongation area (the other side)

4‧‧‧Low friction members

5‧‧‧Side side joint

51‧‧‧1st joint

52‧‧‧2nd joint

6L‧‧‧Outer side joint (one side)

6R‧‧‧ outside side joint (the other side)

71‧‧‧1st joint on the rear side

72‧‧‧2nd joint on the rear side

8‧‧‧Absorbable sheets

A _F ‧‧‧ front area

A _C ‧‧‧Central Area

A _B ‧‧‧ rear area

F _Z ‧‧‧Offset force

Fig. 1 is a plan view of a urine absorbing pad according to an embodiment of the present invention viewed from a surface sheet side in a thickness direction in an unfolded state. Fig. 2 is a cross-sectional view showing a cross section taken along line II-II of Fig. 1 in a urine absorbing pad according to an embodiment of the present invention. Fig. 3 is a cross-sectional view showing a cross section taken along line III-III of Fig. 1 in a urine absorbing pad according to an embodiment of the present invention. Fig. 4 is a plan view showing a cover sheet used in a urine absorbing pad according to an embodiment of the present invention. Fig. 5 is an enlarged plan view of an essential part of the cover sheet shown in Fig. 4; Fig. 6 is a cross-sectional view showing a cross section taken along line VI-VI of the cover sheet shown in Fig. 5; Fig. 7 is a cross-sectional view showing a cross section taken along line VII-VII of the cover sheet shown in Fig. 5 . Fig. 8 is a plan view showing a modification of the cover sheet. FIG. 9(a) is a view schematically showing a state in which the wearer wears the urine absorbing pad according to the embodiment of the present invention (a state in which no biasing force is applied), and FIG. 9(b) It is an explanatory view which shows the state which applied the biasing force in the urine absorbing pad from this state.

Claims (11)

An absorbent article having a longitudinal direction, a broad side direction, and a thickness direction, and having a front region, a rear region, and a central region between the two regions in the longitudinal direction An article characterized in that: the absorbent article comprises: a main portion of a liquid-permeable surface sheet, and a cover sheet which is at least in the rear region and is located on the opposite side of the skin from the surface sheet, and is opposite to The main portion is joined, and the cover sheet has at least an elongated region that is extensible in the longitudinal direction, and has one or a plurality of strength holding portions that extend in the longitudinal direction in the elongated region. The absorbent article according to claim 1, wherein the cover sheet has a side non-elongation region extending in the longitudinal direction at each of both end portions in the width direction, and on the side The square side non-elongation region is joined to the aforementioned main portion. The absorbent article according to claim 1 or 2, wherein the elongation region is at least one end portion included in both end portions in the width direction, and the strength holding portion is wider than the width The end-side extension portion that is adjacent to the side direction has a ridge portion that protrudes toward the skin-facing surface side in the thickness direction and that continuously extends in the width direction, and is oriented in the thickness direction a concave-convex structure in which the non-skin opposing surface side is recessed and continuously extends in the width direction, and the uneven structure is alternately arranged in the longitudinal direction, and the ridge portion has a long length in the width direction And the first ridge portion that contacts the edge in the width direction of the elongated region and the second ridge portion that is short in the width direction and that does not contact the edge of the wide-angle direction of the elongated region, the cover sheet, In a plan view, the region overlapping the end portion on the outer side in the width direction of the first ridge portion and not overlapping the second ridge portion is joined to the main portion. The absorbent article according to claim 3, wherein the end portion side extension portion is formed by alternately overlapping the first ridge portion and the second ridge portion with the groove portion in the longitudinal direction. Is configured. The absorbent article according to the first aspect of the invention, wherein the strength holding portion extends from a front end edge to a rear end edge of the longitudinal direction of the elongated region. The absorbent article according to claim 1, wherein the absorbent article further comprises a low friction member positioned between the surface sheet and the cover sheet in the thickness direction, wherein the cover sheet has a plan view. a front side non-elongation region that is located on the front side of the front side edge in the longitudinal direction of the low friction member and that extends in the width direction. The absorbent article according to claim 1, wherein the absorbent article has a plurality of end portions in the width direction of the cover sheet in the thickness direction, and the cover sheet and the main sheet are joined together. Each of the pair of side-side joint portions has a first joint that is located on the outer side in the width direction and that extends in the longitudinal direction. a second joint portion extending in the longitudinal direction and extending in the longitudinal direction, and a front side edge of the first joint portion is adjacent to a front edge of the cover sheet In the one in which the thickness direction is repeated, the front end edge of the second joining portion is located further rearward than the front end edge of the cover sheet. The absorbent article according to claim 7, wherein the main portion further includes: both end portions in the widthwise direction extending in the longitudinal direction, and located on the skin facing surface side of the surface sheet a pair of side sheets, wherein each of the pair of side sheets and the both sides of the cover sheet in the wide side direction are joined by the pair of side side joint portions, respectively In one aspect, each of the pair of side sheets and the front side of the front sheet are joined to the side of the pair by the outer side joint portions separated by a predetermined distance. The joint portions are each on the outer side in the width direction. The absorbent article according to claim 1, wherein the cover sheet has a rear end portion extending in the widthwise direction, and has a rear side end portion of three equal parts in the width direction. The first region in the width direction, the central region in the broad direction, and the second region in the wide direction, the cover sheet is joined to the surface sheet in the first region in the width direction and the second region in the width direction. One of the sides is not joined to the surface sheet or only a part of the surface sheet is joined to the surface sheet in the central portion in the width direction. The absorbent article according to claim 1, wherein the absorbent article has at least one folding line extending in the longitudinal direction of the absorbent article in the widthwise direction, and the strength holding portion and the aforementioned The polyline is repeated. The absorbent article according to claim 1, wherein the main portion further includes an absorber that extends from the front region to the rear region on a non-skin opposing surface side of the surface sheet; The absorbent sheet is located at the center of the longitudinal direction of the absorbent article on the skin-facing side of the absorbent body, and is located further toward the rear side than the central axis of the longitudinal direction extending in the width direction. And extending toward the front side edge of the cover sheet in the longitudinal direction in the longitudinal direction.