WO2019092807A1

WO2019092807A1 - Absorbent article

Info

Publication number: WO2019092807A1
Application number: PCT/JP2017/040265
Authority: WO
Inventors: 木村　真由美; 剛大石川; 大和益井; 西川　綾
Original assignee: 花王株式会社
Priority date: 2017-11-08
Filing date: 2017-11-08
Publication date: 2019-05-16
Also published as: JPWO2019092807A1; TWI823861B; JP6482736B1; TW201922194A; CN110022809A

Abstract

An absorbent article provided with a surface layer and an absorption layer, the absorbent article having a longitudinal direction corresponding to a direction connecting an abdomen-side portion, a crotch portion, and a back-side portion of a wearer, and a width direction orthogonal to the longitudinal direction, and the absorbent article moreover having a front portion, a rear portion, and a central portion located between the front portion and the rear portion along the longitudinal direction, the central portion including a region corresponding to an excretion point, wherein the absorbent article has a region including an agent for imparting a cooling sensation in the absorption layer or in a member further toward the surface-layer side from the absorption layer, and the absorption layer is provided with a dividing portion at a position that overlaps the region including the agent for imparting a cooling sensation in a plan view.

Description

Absorbent articles

The present invention relates to absorbent articles such as sanitary napkins, incontinence pads, diapers and the like.

In absorbent articles such as sanitary napkins, when the excretory fluid is large or when used for a long time, etc., mure and stickiness may occur and the wearer may feel uncomfortable. On the other hand, conventionally, there has been a technique for improving the wearing feeling by incorporating a cooling agent such as a refreshing agent into the absorbent article (for example, Patent Documents 1 and 2). The cooling agent volatilizes and stimulates TRPM8 and TRPA1 of the sensory nerve cells of the wearer's skin to change the receptor threshold, thereby giving a refreshing feeling. Since the absorbent article described in Patent Document 2 addresses the problem that the cooling sensation material is consumed by excretion, the amount of the cooling sensation material in the region in contact with the wearer's excretion portion is larger than that in the other regions. doing.

International Publication No. 2002/083191 JP, 2010-234031, A

The present invention comprises a surface layer and an absorbent layer, and has a longitudinal direction corresponding to a direction connecting the belly side, crotch and dorsal side of the wearer, and a width direction orthogonal to the longitudinal direction. An absorbent article comprising a front part, a rear part, and a middle part located between the front part and the rear part and including a region corresponding to a discharge point along the longitudinal direction, the absorbent layer or the above There is provided an absorbent article having a region containing a cooling agent in a member on the surface layer side from the absorbing layer, and having a divided part in the absorbing layer at a position overlapping the region containing the cooling agent in plan view. .
Further, according to the present invention, the step of applying a cooling agent over a predetermined width of the raw material member to be an absorption layer, and the absorption over the width wider than the cooling agent application width on the surface of the raw material member to be an absorption layer Providing a longitudinally extending cut region of the layer.

The above and other features and advantages of the present invention will become more apparent from the following description with reference to the accompanying drawings as appropriate.

BRIEF DESCRIPTION OF THE DRAWINGS It is a partially notched perspective view shown typically from the skin contact surface side in the state which expand | extended the sanitary napkin as one preferable embodiment of the absorbent article in this invention. FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II-II of the sanitary napkin shown in FIG. It is a top view of an absorption layer. It is sectional drawing which shows typically another preferable aspect of an absorption layer, (A) is sectional drawing of an aspect which has a convex part and recessed part space in the surface layer side, (B) is a convex part in the back layer side. It is sectional drawing of the aspect which has and recessed part space. (A) is a cross-sectional view schematically showing an example of a state in which the absorbing layer is deformed about the dividing portion as an axis, and (B) schematically shows another example of a state in which the absorbing layer is deformed about the dividing portion. It is sectional drawing shown to. It is sectional drawing which shows the other preferable example of the folding structure of a center absorptive sheet. (A) is a schematic view showing the relationship between the longitudinal length of the slit portion and the distance between the slit portions in the case where there is one slit portion row, and (B) is the case where there are a plurality of slit portion rows It is a schematic diagram which shows the relationship between the longitudinal direction length of a slit part of, and the space | interval of the vertical direction between slit parts, and (C) is a case where there is no space | interval of the longitudinal direction between slit parts in case a slit part row has multiple rows. FIG. It is sectional drawing which expands and shows the polymer rich area | region and the fiber rich area | region in an absorption layer.

Detailed Description of the Invention

TECHNICAL FIELD The present invention relates to an absorbent article which effectively maintains a moderate cooling sensation effect on the skin of a wearer for a long time.

The content of the cooling agent in the absorbent article is reduced with time by volatilization, and the cooling effect becomes thin. However, if the amount of the cooling sensation material is simply increased as in the absorbent article described in Patent Document 2, the skin irritation may become too strong, and the feeling of wearing may be impaired.

On the other hand, the absorbent article according to the present invention can effectively maintain an appropriate cooling sensation effect on the skin of the wearer for a long time.

Hereinafter, a sanitary napkin (hereinafter also referred to as a napkin) 10 as a preferred embodiment of the absorbent article according to the present invention will be described with reference to the drawings.
In the present invention, unless otherwise stated, the side in contact with the human body is referred to as the skin surface side or the skin contact surface side or the surface side, and the opposite side is the non-skin surface side or the non-skin contact surface side or the back surface side It is said. These are used also as a term which shows relative physical relationship in member composition of an absorptive article also about a member which does not have a field which contacts a human body. Moreover, the direction which is located in the front side of a human body at the time of wear is called front, and the direction which is located in the rear side is called back. The normal direction of the front surface or the back surface of the absorbent article is referred to as the thickness direction.

As shown in FIGS. 1 and 2, the napkin 10 has a surface layer 1 on the skin contact surface side and a liquid-retaining absorbent layer 3 located on the non-skin contact surface side of the surface layer 1. In the present embodiment, the back surface layer 2 is disposed on the non-skin contact surface side of the absorbent layer 3. The surface layer 1 has liquid permeability that sends the liquid to the absorbent layer 3, and the back surface layer 2 has leak resistance to the liquid in the absorbent layer 3. The surface layer 1 and the back surface layer 2 have a size that extends outward of the outer edge of the absorption layer 3 while covering both surfaces of the absorption layer 3. Furthermore, an intermediate fiber layer 4 having liquid diffusibility is provided between the surface layer 1 and the absorbent layer 3. Further, the side sheets 5 are laminated on both sides of the skin contact surface side of the surface layer 1. The side sheet 5 and the back surface layer 2 extend outward in the width direction of the absorbent layer 3 to form a wing portion 6 which is a fixing means to clothes and the like. The non-skin contact surface side of the wing portion 6 and the back surface layer 2 has an adhesive portion (not shown) for fixing the napkin 10 to clothes. In the laminated structure of this sheet, the outer peripheral edge of the napkin 10 is an outer peripheral seal portion 9 joined without the absorption layer 3 interposed.

The napkin 10 may include other components, and may have a form without the intermediate fiber layer 4 and the side sheet 5. Furthermore, it may have a leak-proof groove squeezed from the surface layer 1 to the absorbent layer 3, a plurality of embossments on the surface layer 1, and the like. In addition, the side sheet 5 may be left at the free end inward of both sides of the surface layer 1 while being bonded to the surface layer 1, and an elastic member or the like may be provided at the free end to prevent A leak cuff may be configured.

The napkin 10 has a longitudinally long shape having a longitudinal direction (Y direction) and a width direction (X direction) orthogonal to the longitudinal direction in a plan view. Moreover, the surface layer 1, the back surface layer 2, and the absorption layer 3 are longitudinally long shapes like the napkin 10. The longitudinal direction corresponds to the direction connecting the wearer's ventral side, crotch and dorsal side when the napkin 10 is worn. The width direction corresponds to the direction in which the left and right feet in the crotch of the wearer are connected. In the present specification, the longitudinal direction (Y direction) and the width direction (X direction) indicate the direction in plan view of the napkin 10 and at the same time indicate the direction in plan view of the surface layer 1, the back layer 2 and the absorbent layer 3 .

The napkin 10 has an intermediate portion C including an area corresponding to the wearer's excretion point in the longitudinal direction. Furthermore, it has a front part F disposed on the lower abdomen side in front of the middle part C and a rear part R disposed on the rear buttock side. Further, in the middle part C, there is a liquid receiving area C1 which faces the excrement point and directly receives the excrement fluid at the central part in the width direction. As shown in FIGS. 1 and 3, the “width direction central portion” in which the liquid receiving area C1 is located is a range of a predetermined width extending laterally from the center line L in the width direction. Also say the part of the inner range. Specifically, it is a region that spreads laterally from the center line L in the width direction of the napkin 10 and is a portion in the range of 40% to 60% of the width of the absorbent layer. The middle part C, the liquid receiving area C1, the front part F and the rear part R indicate the divisions in the napkin 10 and also indicate the divisions in the surface layer 1, the absorption layer 3 and the back layer 2 corresponding thereto.

The division positions of the middle portion C, the front portion F and the rear portion R may be appropriately set according to the length of the absorbent article set according to the purpose of use and the like. In the case of providing a wing portion that is bent and fixed to the crotch portion of the shorts, a region along the longitudinal direction in which the wing portion is present is the middle portion C. The napkin 10 of the present embodiment shows an example of a shape set for daytime use, etc., and the length in the longitudinal direction is equally divided into three to set the front part F, middle part C and rear part R In the case of a day napkin without cages and wings, the middle part follows this setting. In general, regardless of the shape of the napkin 10, the middle portion C can be set as a portion located at a certain distance from the front portion F. Furthermore, for adult or infant diapers and the like, and for urine collection pads and the like, the length in the longitudinal direction is equally divided into three, and the front part F, middle part C and rear part R are set.

Next, the cooling agent which the napkin 10 has, and the parting portion 8 of the absorbent layer 3 will be described.

The region containing the cooling agent is disposed on the absorbing layer 3 or a member closer to the surface layer 1 than the absorbing layer 3. The cooling agent volatilizes and stimulates the temperature receptor on the wearer's skin and / or mucosal surface to cool and refresh the wearer without having to change the temperature on the skin and / or mucosal surface. It is an agent that can make you feel a sense. The region containing the cooling agent is preferably on the non-skin contact side with respect to the surface layer 1 from the viewpoint of effectively maintaining the appropriate cooling sensation effect on the wearer's skin for a long time. At this time, the aspect in which the cooling agent is contained in the surface layer 1 is not excluded, and it is preferable that the region having the largest content of the cooling agent be on the non-skin surface side of the surface layer 1. Moreover, it is preferable that the area | region containing a cooling agent exists in the intermediate part C in planar view of the napkin 10. FIG.

As a member containing the cooling agent and on the surface layer 1 side of the absorbent layer 3, for example, an intermediate fiber layer 4, a liquid-permeable sheet (not shown) covering the skin contact surface side of the absorbent layer 3, etc. It can be mentioned.

When a cooling agent is contained in the absorption layer 3, it may be contained in any part of the absorption layer 3. However, in view of the effective movement of the volatile component of the cooling agent to the skin in conjunction with the movement of air by the dividing portion 8 described later, the cooling agent is included on the skin surface side of the absorbing layer 3 preferable. The "skin surface side of the absorbent layer 3" referred to herein means the region on the skin surface side when the thickness of the absorbent layer 3 is divided into two equal parts. In this case, as long as a cooling agent is contained on the skin surface side of the absorbent layer 3, a cooling agent may be contained on the non-skin surface side. It is more preferable that, on the skin surface side of the absorbent layer 3, there is a region where the content of the cooling agent is relatively more than that on the non-skin surface side. The region where the content of the cooling agent is relatively large may not be the outermost surface on the skin surface side as long as the skin surface side of the absorbent layer 3 is present. In addition, when a cooling agent is contained in the absorption layer 3, the cooling agent may be contained in the member by the side of the surface layer 1 rather than the absorption layer 3, and it does not need to be contained.

In the absorbent layer 3, it is preferable that the cooling agent be included in a region on the skin surface side of the absorbent layer 3 and inside the both widthwise end edges 39 on the skin surface side.
As a result, the cooling agent is made to last longer in the interior of the napkin 10, and while the stimulation on the sensitive part of the skin such as the buttocks of the wearer is suppressed, the cooling sensation is further imparted to the skin by the action of the dividing portion 8 described later. It can be done surely. From this point of view, the “region inside the widthwise both end edges 39 on the skin surface side” of the absorbent layer 3 refers to a region that avoids the area around the buttocks of the wearer's skin. Specifically, it is a region which does not include both end edges 39 in the width direction and which spreads laterally from the center line L in the width direction, and is preferably a region of 75% or less of the width of the absorbent layer, It is more preferable that the region be 60% or less of the layer width.

In the region containing the cooling agent, it is preferable to have a region with a smaller amount of cooling agent basis weight than the surrounding at the center in the width direction (liquid receiving region C1) of the middle part C of the napkin 10.
Thereby, it can suppress that a cooling sensation becomes strong too much with respect to the excretory part sensitive to a wearer's irritation | stimulation. From the viewpoint of suppressing excessive stimulation to the skin, the “region containing a cooling agent” and the “region having a low cooling agent basis weight” in the region extend in the planar direction of the member near the surface layer 1 It is preferably a region. For example, in the case where the intermediate fiber layer 4 contains a cooling agent, in the plane region of the intermediate fiber layer 4, the central portion in the width direction of the intermediate portion C has a region having a smaller amount of cooling agent basis weight than the periphery. preferable. In addition, when the cooling layer is contained in the absorption layer 3, in the flat surface area of the outermost layer on the skin surface side of the absorption layer 3, the area in the width direction center of the middle portion C has a smaller cooling agent basis weight than the surrounding area. It is preferable to have

In the napkin 10, since a cooling agent is effectively sent out to skin even if a residual amount reduces by the effect | action of the division part 8 mentioned later, it is not necessary to increase content excessively. Therefore, while the content is the same as in the prior art, it is possible to suppress the stimulation on the skin and to effectively maintain a proper cooling sensation effect for a long time.
Specifically, in the case of menthyl lactate, for example, in the case of menthyl lactate, relative to the product length, the content of the cooling agent in the entire napkin 10 feels a good sense of coldness and reduces the mure and sticky feeling. Is preferably 4 mg / 100 mm or more, more preferably 5 mg / 100 mm or more, and still more preferably 6.5 mg / 100 mm or more. From the viewpoint of suppressing skin irritation, the content is preferably 13.5 mg / 100 mm or less, more preferably 12.5 mg / 100 mm or less, and still more preferably 11.5 mg / 100 mm or less.
When the region near the surface layer 1 in the absorption layer 3 at the center in the width direction of the middle portion C or the middle fiber layer 4 has “a region having a lower cooling agent basis weight than the periphery”, “the cooling agent than the periphery” The basis weight of the cooling agent in the region having a low basis weight is preferably 85% or less, more preferably 75% or less, of the basis weight of the cooling agent in the other region, and is preferably 65% or less. It is further preferred that

(Presence or absence of content of cooling agent, measuring method of content)
The cooling agent can be extracted with a solvent from the target member or target site of the absorbent article, and the extraction solution can be analyzed by gas chromatography (GC). The measurement is performed with a flame ionization detector (FID) attached to a gas chromatograph, and can be measured, for example, by 7890A manufactured by Agilent technologies. The relationship between the concentration of the compound constituting the cooling agent and the peak area is previously converted to a calibration curve, and quantitative work is performed based on the calibration curve.
The case where the cooling agent contains menthyl lactate and / or menthol is described as an example. Menthyl lactate and / or menthol is extracted from the target member or target site using methanol as a solvent. Using methanol as a solvent, prepare in advance 3 to 5 steps of menthyl lactate solution and / or menthol solution with different concentrations, calculate peak areas of each concentration from the chromatogram of GC, and use n-pentyl alcohol as a standard sample A standard curve is plotted where the peak area is plotted against the concentration of the standard sample. By analyzing the extract under the same conditions as the analysis for which the calibration curve was prepared, the peak area obtained is applied to the calibration curve to calculate the amount of menthyl lactate and / or the amount of menthol. The amount of cooling agent per unit area (cooling agent basis weight) can be determined by dividing the amount of menthyl lactate and / or menthol obtained by the area of the product site collected in advance. In addition, the amount of menthyl lactate and / or menthol obtained is divided by the length (mm) of the absorbent article in the lengthwise direction, and multiplied by 100 to obtain the amount of cooling agent per 100 m of product length. Can.
In order to know the amount of cooling agent for each component or part of the product, it is possible to analyze by decomposing the product in a chamber at 5 ° C. and taking out the material part to be measured.

The absorption layer 3 has a dividing portion 8.
The dividing portion 8 is a portion where the continuity of the constituent material of the absorbent layer 3 is broken, and is a gap portion without a member. For example, it may be a slit portion cut into an elongated shape, or may be a recessed space in which a part of the member is pressed and recessed, or even a recessed space in which the basis weight of the member is partially reduced. Good.

In the present embodiment, the dividing portion 8 is disposed as the slit portion 81 (see FIGS. 1 to 3). A plurality of slit parts 81 are dispersed and arranged in the plane region of the absorption layer 3. The “slit portion” referred to here can be defined as a cut portion having a member cutting width of 0.5 mm or less, preferably 0.3 mm or less, more preferably 0.2 mm or less. The “width” of the slit portion 81 refers to the distance (opening width) between the disconnected members in the direction orthogonal to the length direction in which the slit portion 81 extends in a plan view of the napkin 10. The width of the slit portion 81 can be measured with a digital microscope VHX-1000 manufactured by Keyence Corporation in a natural state where the absorbent layer 3 is taken out of the napkin 10 and placed on a horizontal table and tension is not applied. At that time, the measurement magnification is appropriately adjusted and measured.
The slit portion 81 will be described later together with the description of the preferable specific mode of the absorption layer 3.

As a specific example in the case where the dividing portion 8 is a recessed space 82 having a small basis weight partially, for example, the

absorbent layers

310A and 310B shown in FIGS. 4 (A) and 4 (B) can be mentioned. These are a stack of hydrophilic fibers or a mixed stack of hydrophilic fibers and a superabsorbent polymer material, having a predetermined thickness and having an uneven shape with a partially reduced basis weight. . The superabsorbent polymer material referred to here is a surface cross-linked polymer material called so-called SAP (the same applies hereinafter).
Specifically, the absorbent layer 310A shown in FIG. 4A has a plurality of block-shaped convex portions 311 on the surface layer 1 side (skin surface side), and the basis weight is small between the

convex portions

311 and 311. A plurality of recess spaces 82 are provided as the dividing portion 8. Further, the absorbent layer 310B shown in FIG. 4B has a plurality of block-shaped convex portions 311 and concave portion spaces 82 as dividing portions 8 on the back surface layer 2 side (non-skin surface side). In FIG. 4A, on the side of the back surface layer 2, and in FIG. 4B, on the side of the surface layer 1, there is a thin skin portion 312 which closes the bottom of the recess space 82 and connects the convex portions 311 to each other.

Furthermore, the dividing portion 8 may be a consolidated recessed space in which the surface layer 1 and the absorbing layer 3 are integrally recessed toward the back layer 2 side, that is, a linear groove. The linear grooves are formed to extend in the width direction (X direction) in the longitudinal groove extending in the longitudinal direction (Y direction) in the middle portion C and in the front portion F and the rear portion R, respectively, in plan view. And first and second lateral grooves. The linear grooves can be formed according to a conventional method by pressing (so-called embossing) with or without heat, or embossing such as ultrasonic embossing. In the linear groove, although not shown, the space between the surface layer 1 and the absorption layer 3 is pressure-bonded through an adhesive or integrated by heat fusion or the like. In the expression that the surface layer 1 and the absorption layer 3 are connected, another layer such as the intermediate fiber layer 4 is interposed between the surface layer 1 and the absorption layer 3, and the surface layer and the other layers And the case where the other layer and the absorption layer 3 are joined (bonded).
Such a linear groove can suppress the diffusion of the liquid in the planar direction of the absorbent layer 3 and effectively prevent the liquid leakage from the periphery of the napkin 10. The width (length in the direction orthogonal to the length direction) and the depth of the linear groove may be set in the same manner as the linear groove in the absorbent article of this type. Moreover, with "linear" in a linear groove | channel, the shape of a groove | channel (recessed part) is not restricted to a straight line in planar view, A curve is included and each line may be a continuous line or a broken line. For example, the linear grooves may be composed of an array of non-continuous multiple point embossings.

The dividing portion 8 is disposed at a position where the region including the cooling agent described above overlaps with the napkin 10 in a plan view. As long as they are at overlapping positions in plan view, the region in which the dividing portion 8 is disposed and the region including the cooling agent may be at the same thickness position or at different thickness positions. In consideration of the effect of the dividing portion 8 on the cooling agent described later, it is preferable that the region of the absorbent layer 3 in which the dividing portion 8 is disposed contain a cooling agent.

The dividing portion 8 may be at any position in the thickness direction of the absorbent layer 3, may be on the surface layer 1 side (skin surface side), or may be at a predetermined depth from the surface layer 1 side. It may extend over the entire thickness direction of the absorbent layer 3. In consideration of the action of the dividing portion 8 to the cooling agent described later, the dividing portion 8 is preferably disposed at least on the surface layer 1 side (skin surface side) of the absorbing layer 3.

Since the dividing portion 8 is a discontinuous portion of the constituent member of the absorbing layer 3, it can be an axis of deformation of the absorbing layer 3. For example, when external force such as pressing inward in the width direction of the napkin 10 or shearing force in the front-rear direction is applied according to the movement of the wearer's body when wearing the napkin 10, the absorbent layer 3 can be deformed. Thus, the dividing portion 8 forms a space (for example, a region indicated by a symbol P in FIGS. 5A and 5B) for storing air on the one hand according to the deformation of the absorbing layer 3 and moves the air on the other ( For example, it is possible to form an air passage which causes an arrow F shown in FIG. 5 (A). When the dividing portion 8 becomes an air passage, the force of deformation of the absorbing layer 3 acts as a driving force for pushing out the air.

At this time, the dividing portion 8 overlaps the region including the cooling agent in plan view, thereby interlocking with the movement of air by the action of the dividing portion 8 (for example, the arrow F illustrated in FIG. 5A). The volatile component of the cooling agent also becomes easy to move.
That is, when air moves in and out of the movement of the absorbent layer 3, the volatile component of the cooling agent accumulated inside the absorbent layer 3 or between the members is pushed up to the skin surface of the wearer, and a cooling sensation effect is effectively expressed. In particular, when the residual amount of the cooling agent decreases with time, the volatile component of the cooling agent can be sufficiently fed to the skin surface. For example, when the cooling agent exudes to the back of the absorption layer 3 and remains, the volatile component of the cooling agent can be actively fed from the inside of the absorption layer 3 to the skin surface. As a result, the napkin 10 can effectively maintain the cooling sensation effect longer. It should be noted that, on both sides of the absorbent layer 3, the air permeation of the liquid-permeable surface layer 1 is larger than that of the leak-proof back layer 2, which makes the above-mentioned push to the skin surface more effective. .

5A and 5B schematically show the deformation of the absorbent layer 3 with the dividing portion 8 as an axis, and the actual deformation is not limited to this. In addition, the movement of the arrow F shown in FIG. 5A and the formation of the area where the air is accumulated as shown by the symbol P in FIG. It may also occur simultaneously at different places within the area in which the. Furthermore, the area in which the air indicated by the symbol P is accumulated is not generated only in the vicinity of the dividing portion 8 but may also be generated in the interlayer space as described later. The air pool in the space between the layers occurs regardless of the presence or absence of deformation around the dividing portion 8, and the volatile components of the air and the cooling agent are pushed out to the skin surface by the deformation around the dividing portion 8. .

It is preferable that the parting part 8 is distribute | arranged to the area | region inside the width direction both-ends edge 39 of the absorption layer 3 from a viewpoint of the suitable cooling feeling provision to skin. The "region inside the width direction both-ends edge 39 of the absorption layer 3" said here says the area | region which avoided the vicinity of the buttocks of a wearer's skin. Specifically, it is a region that does not include both end edges 39 in the width direction but extends symmetrically to the left and right from the center line L in the width direction, and is preferably a region within 85% or less of the width of the absorbing layer. It is more preferable that the region be 70% or less of the width of the absorbing layer. Further, from the viewpoint of controlling the exudation of the cooling agent, the parting unit 8 disposed on the outermost side in the width direction of the absorbing layer 3 is more disposed outside the region including the cooling agent in the width direction. preferable. By giving preferential cooling sensation by the dividing portion 8 of the above arrangement, stimulation to a sensitive part of the skin such as the buttocks of the wearer can be suppressed, and the wearer can feel a suitable cooling sensation. Here, the width of the absorption layer 3 means the minimum width of the middle portion C of the absorption layer 3. Therefore, when the absorbing layer 3 is rectangular, the width of the absorbing layer 3 may be the width direction length of any portion in the width direction of the absorbing layer 3 in the middle portion C. On the other hand, when the width is wide in the front and rear parts and the width is narrow in the middle part C, for example, like an hourglass shape, the width direction length of the narrowest part in the middle part C is the width of the absorbing layer 3 .
In addition, it is preferable that the dividing portion 8 be disposed in a region including at least the middle portion C in the longitudinal direction of the absorption layer 3 from the viewpoint of providing a suitable cooling sensation to the skin.

From the viewpoint of suppressing the stimulation to the sensitive part of the skin, the above-mentioned side sheet 5 extends in the longitudinal direction across the width direction both edges 39 of the absorption layer 3 from the width direction outside of the absorption layer 3 Is preferred. Further, at least in the middle portion C, the widthwise inner end of the side sheet 5 is preferably on the outer side in the width direction than the dividing portion 8 located on the outermost side in the width direction. Thereby, even if the cooling agent exudes beyond the dividing portion 8, the side sheet 5 can suppress the volatile component of the cooling agent from directly stimulating the vicinity of the buttocks of the wearer. . At this time, it is preferable from the viewpoint of more effective suppression of skin irritation that the side sheet 5 has lower air permeability than the surface layer 1. The air permeability can be appropriately set by the method used for this type of article. For example, when the side sheet 5 is made of non-woven fabric, air permeability can be suppressed by narrowing the inter-fiber distance or selecting an oil agent to be used. It is preferable that the air permeability of the side sheet 5 is lower than the air permeability of the surface layer 1 when the air permeability is measured in accordance with JIS L1913 "6.8.2 Gurley type". When the side sheet is too small to measure in the Gurley format, the side sheet is attached to a non-air-permeable film material (preferably Kokuyo OHP film etc.) having an opening smaller than that size, and the measurement is performed. Conduct and convert the opening area value into the area (642 mm ² ) specified in the Gurley format.

Moreover, it is preferable that the intermediate fiber layer 4 mentioned above exists in the area | region which overlaps with the area | region which contains a cooling agent in planar view between the surface layer 1 and the absorption layer 3. FIG. Thereby, on the non-skin surface side of the surface layer 1, the space between the layers for accumulating the volatilized component of the cooling agent is increased. In addition, the presence of the intermediate fiber layer 4 makes it possible to prolong the cooling agent and impart a good cold feeling. In this case, the cooling agent may or may not be contained in the intermediate fiber layer 4. From the viewpoint of effectively maintaining the cooling effect by the cooling agent for a long time, it is preferable that the region having the largest content of the cooling agent be present on the absorbent layer 3 (particularly on the skin surface side of the absorbent layer 3).

The intermediate fiber layer 4 is preferably joined to the surface layer 1 by a plurality of longitudinally extending adhesives intermittently arranged in the width direction. Similarly, the intermediate fiber layer 4 is preferably joined to the absorbent layer 3 by a plurality of longitudinally extending adhesives intermittently arranged in the width direction. Intermittent placement of the adhesive in the width direction can be achieved by various methods used for this type of article. For example, intermittent coating of a hot-melt adhesive or the like in a linear, spiral, Ω shape, summit shape or the like can be mentioned. At this time, coating can be performed using various means such as a slot coat gun, a spiral spray gun, a spray gun, and a dot gun.
Thereby, the adhesive can suppress the cooling agent from diffusing outward in the width direction, and the cooling effect can be maintained at a desired location.
Moreover, the ratio of the area where the adhesive is disposed in the skin surface-side surface area of the absorbent layer 3 is preferably 20% or less, more preferably from the viewpoint of securing the liquid absorbability (liquid permeability). It is 15% or less, more preferably 10% or less. The ratio of the coating width to the absorbent layer width in the middle portion C of the adhesive is preferably 45% or more, more preferably 45% or more, from the viewpoint of suppressing the diffusion of the cooling agent outward in the width direction. Is 60% or more, more preferably 75% or more. In addition, "the coating width of an adhesive agent" said here is the sum total of the width | variety of the adhesive agent in each coated part, when the adhesive agent is intermittently distribute | arranged to the width direction.

Further, the intermediate fiber layer 4 is preferably a non-woven fabric containing thermoplastic fibers. When the intermediate fiber layer 4 is such non-woven fabric, the liquid diffusibility becomes high. Thereby, when the cooling agent is contained in the intermediate fiber layer 4, the cooling agent exudes in the thickness direction to the non-skin surface side, regardless of whether it is contained on the skin surface side of the absorbent layer 3. The cold sensation effect is likely to be maintained longer.
The intermediate fiber layer 4 preferably has a higher fiber density than the surface layer 1. Due to the density gradient effect, while the transfer amount of the cooling agent to the surface layer 1 is controlled on the surface of the intermediate fiber layer 4, the volatilization component of the cooling agent is preferentially removed from the dividing portion 8 by the action of the dividing portion 8. Can be sent to As a result, it is possible to maintain a cold feeling for a long time while suppressing excessive stimulation on the skin.

As the absorbent layer 3, various forms which are usually used as an absorbent article can be adopted without particular limitation as long as the above-described action of the dividing portion 8 is exerted. For example, a stack of hydrophilic fibers or a mixed stack of hydrophilic fibers and a superabsorbent polymer material may be covered with a hydrophilic covering sheet. In addition, it may be composed of a thin absorbent sheet in which a superabsorbent polymer material is sandwiched and fixed between two sheet-like fiber layers made of hydrophilic fibers. In forming the absorbent sheet, the high absorbency polymer can be integrated using the adhesive force which is expressed by wetting, a binder added separately, or a binder such as adhesive fiber. The preparation can be performed by various methods commonly used, and may be either wet or dry.
The absorbent sheet has a high absorbing power which hardly causes gel blocking because the highly absorbent polymer material is dispersedly disposed in the plane direction of the sheet while the thickness is suppressed to 3.0 mm or less. For example, those described in paragraphs [0019] to [0131] of JP-A-8-246395 can be mentioned.

The absorbent layer 3 is preferably composed of an absorbent sheet containing the above-mentioned superabsorbent polymer material and hydrophilic fibers. Thereby, thickness reduction of the absorption layer 3 is possible, it is easy to arrange | position the parting part 8 in a desired position, and it can reinforce cooling sensation provision in a desired position.

The absorbing layer 3 preferably has a layered structure in the thickness direction, from the viewpoint of more effectively feeding the volatile component of the cooling agent to the skin surface by the dividing portion 8. When the absorption layer 3 has a laminated structure, the volatilized component of the cooling agent can be easily accumulated in the space between the layers regardless of the presence or absence of deformation of the absorption layer 3. In addition, when the cooling agent exudes into the absorption layer 3, movement in the same layer is likely to occur, and the amount of the cooling agent exuded in the thickness direction can be suppressed. Thereby, the volatilized component of the cooling agent can be accumulated in the layer near the skin surface side in the absorbing layer 3. Thus, the volatilized component of the cooling agent sufficiently accumulated between the layers opens and closes the layers by the deformation of the absorbing layer 3 and is fed to the skin surface through the air passage formed by the dividing portion 8, and the appropriate cooling sensation Can make you feel longer.

The absorbent layer 3 more preferably has a structure in which the above-described absorbent sheets are laminated, from the viewpoint of enhancing the opening and closing property between the layers. Moreover, thereby, it becomes easy to provide the division part 8 in the desired place of the absorption layer 3, and it becomes possible to control the cool feeling given to a wearer with high precision.

Next, a preferable specific structure of the absorbing layer 3 and a preferable arrangement of the dividing portions 8 in the absorbing layer 3 will be described.

The absorbent layer 3 shown in FIGS. 2 and 3 is composed of an absorbent sheet containing the above-mentioned superabsorbent polymer and hydrophilic fibers. It has the structure where the absorptive sheet was laminated. More specifically, the absorbent layer 3 has a main absorbent sheet 31 and a central absorbent sheet 32 disposed on the non-skin side of the main absorbent sheet 31, and the both absorbent sheets are folded. It has a laminated structure. Thereby, the cooling agent can be easily diffused in the surface direction of the folded sheet layer, and it can be more effectively suppressed that the cooling agent exudes in the thickness direction to the non-skin surface side of the absorbing layer 3 .

The main absorbent sheet 31 has a folding structure in which both end portions in the width direction are overlapped on the back surface layer 2 side and folded in three. The main absorbent sheet 31 has a length ranging from the middle part C to the front part F and the rear part R, and has an outer shape of the absorbent layer 3.
The central absorbent sheet 32 has a folded structure in which both ends in the width direction are overlapped on the surface layer 1 side and folded in three. The central absorbent sheet 32 is narrower than the folded main absorbent sheet 31 in the folded state, and the length in the longitudinal direction is shorter than the main absorbent sheet 31, and the width direction center of the middle portion C Are arranged. The central absorbent sheet 32 is housed inside the folded structure of the main absorbent sheet 31. In this arrangement, the central absorbent sheet 32 is not on the skin surface side but on the non-skin surface side of the main absorbent sheet 31, and is disposed on the non-skin surface side of at least the skin surface side portion 31A of the main absorbent sheet 31. ing.

The absorbent layer 3 has a central absorbent sheet 32 in the above-described laminated structure, so that it is thicker than the central portion in the width direction of the middle portion C as an overlapping portion of the main absorbent sheet 31 and the central absorbent sheet 32. A high basis weight portion 33 is provided. At the position of the high basis weight portion 33, the napkin 10 is preferable because it is easy to fit the skin surface of the wearer and the wearer can easily feel cold. Moreover, the absorption layer 3 can suppress the exudation amount of the cooling agent to the thickness direction in an interlayer by the laminated structure of the sheet | seat in the high basic weight part 33. As shown in FIG. Thereby, the volatilized component of the cooling agent can be stored at a position relatively close to the skin of the absorbent layer 3 in the region of the middle portion C and can be sent to the skin, which is preferable.

The ratio (H2 / H1) of the thickness (H2) of the portion other than the high basis weight portion 33 to the thickness (H1) of the high basis weight portion 33 in the absorbent layer 3 is used from the viewpoint of using without discomfort to the skin surface 1/5 or more is preferable and 1/3 or more is more preferable. The ratio (H2 / H1) is preferably 4/5 or less, more preferably 2/3 or less, from the viewpoint of fit.
The ratio (M2 / M1) of the basis weight (M2) of the part other than the high basis weight part 33 to the basis weight (M1) of the high basis weight part 33 in the absorbent layer 3 is the liquid diffusion prevention In light of the above, 1⁄4 or more is preferable, and 1⁄3 or more is more preferable. The ratio (M2 / M1) is preferably 7/8 or less, more preferably 2/3 or less, from the viewpoint of preventing deflection due to the difference in rigidity between the high basis weight part and the low basis weight part.

The folded structure of the central absorbent sheet 32 is not limited to the embodiment shown in FIG. For example, it may be folded as shown in FIGS. 6 (A) to 6 (D). FIG. 6A shows an aspect in which both ends in the width direction of the central absorbent sheet 32 are folded back in the S-shape on the skin side and the non-skin side, respectively. FIG. 6B shows an aspect in which the sheet is folded in half in the width direction. 6 (C) and 6 (D) show a mode in which the portions folded in three in the width direction are equal in length.

The folded structure of the main absorbent sheet 31 is not limited to the mode shown in FIG. For example, it may be similar to those shown in FIGS. 6 (A) to 6 (D) shown as the folded structure of the central absorbent sheet 32. Moreover, the structure which laminated | stacked the sheet | seat of 2 sheets divided into the skin surface side and the non-skin surface side may be sufficient. Furthermore, it is not limited to the aspect which includes central absorptive sheet 32 inside the folding structure of main absorptive sheet 31, but does not include the central absorbent sheet on the non-skin side of the folding structure of main absorptive sheet 31 32 may be laminated.
However, when the central absorbent sheet 32 is included in the folded structure of the main absorbent sheet 31, the volatile component of the cooling agent is more easily retained, which is preferable from the viewpoint of the action of the dividing portion 8 described above.

It is preferable that the overlapping portions of the absorbent sheets are not joined regardless of the laminated structure of the absorbent layer 3. Thereby, the space between the layers of the absorption layer 3 is easily formed, and the opening and closing property between the above layers is enhanced. As a result, feeding of the volatile component of the cooling agent to the skin through the dividing portion 8 can be more easily expressed.

In such an absorption layer 3, a plurality of dividing portions 8 are provided as slit portions 81.
The slit portion 81 is formed to penetrate the absorption layer 3 in the thickness direction. In the high basis weight portion 33, the slit portion 81 penetrates through a laminated portion in which the main absorbent sheet 31 and the central absorbent sheet 32 are combined. In portions other than the high basis weight portion 33, the slit portion 81 penetrates the entire laminated portion of the main absorbent sheet 31. Thereby, in any of the portions other than the high basis weight portion 33 and the high basis weight portion 33, deformation on the axis of the slit portion 81 of the absorbing layer 3 and opening and closing of the layers can be more reliably generated.

The slit portion 81 is preferably disposed in a region including at least the middle portion C in the vertical direction of the absorption layer 3 in plan view. Further, among the slit portions 81, those located on the outermost side in the width direction are, as described above, located on the inner side with respect to the both end edges 39 in the width direction of the absorbing layer 3, and are arranged on the outer side in the width direction Preferably.

The slit portion 81 has a length extending in the longitudinal direction in plan view of the absorbing layer 3 and is arranged in a plurality in the longitudinal direction. A plurality of the vertical arrays are arranged in the width direction. The arrangement pitch of the slit portions 81 in each row is arranged to be shifted in the vertical direction between the rows of the slit portions 81 adjacent in the width direction. Hereinafter, each row in which the slit portions 81 are arranged in the longitudinal direction is referred to as a slit portion row (when the slit portion rows are distinguished, they are referred to as 85A, 85B, 85C, and so on). Further, a region in the plane direction in which the slit portion row is arranged is referred to as a slit portion region 86.

The distance L2 in the longitudinal direction between the

slit portions

81, 81 is preferably equal to or less than the length (length in the longitudinal direction) L1 of the slit portion 81 (see FIGS. 7A to 7C). By reducing the vertical distance L2 between the slit portions 81 as much as possible, the suppression effect on the cooling agent leaking out in the width direction of the absorbing layer 3 is further enhanced. From the viewpoint of suppressing the exudation of the cooling agent, the distance L2 between the

slit parts

81, 81 means the length of the continuous part where the absorption layer 3 does not break as the entire slit part area 86. When the slit part area | region 86 has the some slit part row | line | column 85, the whole is regarded as one row and the space | interval L2 is grasped | ascertained.

As shown in FIG. 7A, when one slit portion row 85A is arranged, the distance L2 between the

slit portions

81, 81 is made equal to or less than the longitudinal length L1 of the slit portions 81 (L2 It is preferable that ≦ L1). From the viewpoint of retention of strength of the absorption layer 3 and prevention of deflection, it is preferable that the distance L2 is more than 0 (zero) so that the slit portions 81 arranged in one row are not connected.

Further, as shown in FIG. 7B, when the

slit portion rows

85A, 85B, and 85C arranged in parallel are disposed, the longitudinal direction between the

slit portions

81 and 81 adjacent to each other in the width direction among the slit portion rows is provided. It is preferable that the distance L2 be equal to or less than the longitudinal length L1 of the slit portion 81 (L2 ≦ L1). The vertical interval L2 between the

slit parts

81 and 81 referred to here is, in other words, projection of another slit part line on one slit part line (for example, projection of the slit part lines 85B and 85C on the slit part line 85A) It means the interval L2 when trying. Therefore, the above condition may be satisfied even if the longitudinal interval L2 between the

slit portions

81, 81 may exceed the longitudinal length L1 of the slit portions 81 for one slit portion row. Thereby, it can suppress that it exudes in the width direction of a cooling agent in cooperation with slit part row | line | columns. In this case, there may be a portion where the distance L2 between the adjacent slit portions 81 in the different rows is 0 (zero). In particular, as shown in FIG. 7C, it is preferable to set all the intervals L2 in the vertical direction of the slit portions 81 adjacent to each other in different rows to 0 (zero). Thereby, in the slit part area | region 86, the slit part 81 exists also in any virtual line which traverses the width direction with respect to the vertical direction, and the suppression effect with respect to the exudation of the cooling agent of the width direction becomes higher.

The absorbent layer 3 preferably includes a polymer rich region 35 and a fiber rich region 36 as shown in FIG. 8 in a cross sectional view. Specifically, FIG. 8 shows an embodiment in which the polymer rich area 35 and the fiber rich area 36 are laminated on a part of the thickness cross section of the folded absorbent sheet constituting the absorbent layer 3 to form an integral structure. It shows.
The polymer rich area 35 and the fiber rich area 36 are the mass ratio of the superabsorbent polymer material 37 to the total mass of the mass of the superabsorbent polymer material 37 and the mass of the hydrophilic fiber (hereinafter referred to simply as “superabsorbent polymer material It is defined by "the mass ratio of 37". In the polymer rich region 35, the mass ratio of the superabsorbent polymer material 37 is relatively higher than that of the fiber rich region 36. On the other hand, in the fiber-rich region 36, the mass ratio of the superabsorbent polymer material 37 is relatively lower than that of the polymer-rich region 35.

The fiber-rich region 36 has a thickness of 1/10 or more and 7/10 or less, and particularly 1/3 or more and 2/3 or less, relative to the total thickness of the absorbent layer 3, from the viewpoint of diffusivity and retention of body fluid It is preferable from
Further, in the case of the structure of the absorbent layer 3 in which the boundary between the polymer rich region 35 and the fiber rich region 36 is not clear as in the integrated structure, when the thickness is divided into two, one thickness region and the other The polymer-rich region 35 is the one in which the mass ratio of the superabsorbent polymer material is relatively large in comparison with the thickness region, and the fiber-rich region 36 is the one in which the mass ratio of hydrophilic fibers is relatively large.

With the above configuration, the absorbent layer 3 has a polymer-rich region 35 in which free water becomes relatively small after absorption and a fiber-rich region 36 in which a relatively large amount of free water remains in the thickness direction of the absorbent layer 3 Provide different mechanisms to deliver
Specifically, the polymer rich region 35 provides an environment in which the cooling agent can be appropriately volatilized because the free water is relatively small. Under this environment, the component of the cooling agent volatilized in the polymer rich region 35 is sent to the skin by the action of the slit portion 81 (the dividing portion 8). On the other hand, the fiber-rich region 36 has a lot of free water, so when the cooling agent is used together with a water-soluble capsule or a delivery system for delivering the agent, the skin feels cold according to the movement of the liquid. It can be granted. In addition, the fiber rich region 35 can suppress the volatilization of the cooling agent.
Thus, by preferentially including the cooling agent in any of the polymer rich region 35 and the fiber rich region 36, it is possible to preferably control the liquid absorption property, the cooling sensation imparting property, and the like.

When the polymer rich area 35 includes a cooling agent and the polymer rich area 35 is disposed on the non-skin side of the fiber rich area 36, the polymer rich by the fiber rich area 36 and free water in the area. It is possible to appropriately suppress the diffusion of the component in which the cooling agent is volatilized in the rich region 35. This makes it possible to prolong the cooling effect. At that time, it is preferable that the slit portion 81 be disposed so as to penetrate the fiber rich region 36 and the polymer rich region 35 at least from the skin surface side of the absorbent layer 3.

On the other hand, when the fiber-rich region 36 has a region containing a cooling agent and the region containing the cooling agent is disposed on the most surface layer 1 side (skin surface side) of the absorbent layer 3, a feeling of cooling is felt. It will be easier. In this case, the fiber rich region 36 volatilizes the cooling agent in a controlled manner. At a position close to the surface layer 1, the stimulation can be suppressed while reducing the content of the cooling agent, and the cooling effect can be controlled to be more suitable, which is preferable.

The mode in which the polymer rich area 35 and the fiber rich area 36 shown in FIG. 8 are stacked up and down in the sheet thickness is the whole of the folded main absorbent sheet 31 and the central absorbent sheet 32 of the absorbent layer 3. Also, it may be in part. Further, the polymer rich region 35 and the fiber rich region 36 may be arranged at separate portions in the folded structure of the absorbent sheet constituting the absorbent layer 3 in addition to the embodiment shown in FIG. From the viewpoint of suppressing excessive stimulation to the skin and maintaining an appropriate cooling sensation effect for a long time, it is preferable that the absorbent sheet is laminated in the thickness direction on the same site. The fiber rich area 36 and the polymer rich area 35 are laminated in the order of at least the sheet portion on the most surface layer 1 side (skin surface side) of the absorbent layer 3 (skin surface side portion 31A of the main absorbent sheet 31) Is preferred.

The formation of the polymer rich area 35 and the fiber rich area 36 in the absorbent sheet can be performed, for example, as follows.
First, a wet fiber web made by wet papermaking of a water slurry containing hydrophilic fibers is produced. The water slurry may contain a heat melting adhesive fiber, a paper reinforcing agent, and the like. The superabsorbent polymer material is sprayed onto the fiber web in the wet state to create a state in which the superabsorbent polymer intercalates between the fibers. This portion becomes the polymer rich region 35 in the absorbent sheet. Next, a fiber assembly containing hydrophilic fibers and a heat melting adhesive fiber or a paper strength reinforcing agent is laminated on the surface to which the superabsorbent polymer has been applied, dried, and integrated to obtain an absorbent sheet. . The portion of the fiber assembly laminated later becomes the fiber rich region 36.
When the absorbent sheet is produced dry, the layer to which the high absorbent polymer material is dispersed may be paper making, dried paper, or non-woven fabric produced by various methods. From the viewpoint of facilitating the high absorbency polymer material to be introduced between the fibers, bulky paper such as creped, air through non-woven fabric and the like are preferable. In this case, a hot melt adhesive or the like is used for bonding the high-absorbent polymer material to the component fibers of the layer to be the polymer-rich region 35, and bonding to the layer to be the polymer-rich region 35 and the layer to be the fiber-rich region 36. A water soluble adhesive or the like may be used. Furthermore, the fiber rich area 36 may be formed by laminating or spraying hydrophilic fibers on the layer to be the polymer rich area 35.

Next, the preferable manufacturing method of the absorbent article of this invention is demonstrated.
As a preferable manufacturing method, it has the following process in the formation process of the absorbent layer 3 among the manufacturing methods of the absorbent article normally used.
That is, the step (S1) of applying the cooling agent over the predetermined width of the raw material member to be the absorption layer, and the surface of the raw material member to be the absorption layer over the width wider than the cooling agent application width And a step (S2) of providing a dividing portion region extending in the longitudinal direction.

In the step (S1), the width to which the cooling agent is applied is preferably a region which is inside the widthwise end edges 39 of the absorbent layer 3 described above. It is more preferable that the region be, for example, 75% or less of the width of the absorption layer 3. When the raw material member used as the absorption layer 3 is an absorbent sheet member, it may be folded like a process (S3) mentioned later, and a lamination | stacking absorbent sheet may be formed. At that time, the width of one surface of the laminated absorbent sheet is the width of the absorbent layer 3 described above. In the step (S1), the cooling agent is prepared as a cooling agent solution (coating liquid) mixed with a solvent and applied. As the solvent, those which can be usually used can be adopted, and examples thereof include dipropylene glycol and the like.
In the step (S2), the width of the region forming the dividing portion 8 is preferably a region wider than the cooling agent application width and inside the both widthwise end edges 39 of the absorption layer 3 described above. . It is more preferable that the region be in a range of, for example, 85% or less with respect to the width of the absorption layer 3.
Moreover, in any of the step (S1) and the step (S2), it is preferable to perform processing on at least the region to be the middle portion C of the raw material member to be the absorbent layer 3.

Either step (S1) or step (S2) may be performed first. However, when the step (S1) is performed after the step (S2), the diffusion of the cooling agent to the widthwise end edges 39 is more reliably suppressed, which is preferable.

Moreover, it is preferable that a process (S2) is a process of forming a cut | notch (slit part 81) as the division part 8. FIG. Thereby, formation of the parting part 8 can be performed with desired arrangement | positioning and depth precisely.
More specifically, the raw material member which becomes an absorption layer is an absorptive sheet member, and the thing wider than the width | variety of the absorption layer 3 is used supposing folding. A plurality of cuts (slit portions 81) are provided in a distributed manner in the surface direction in a predetermined area of the absorbent sheet. The slits provided in the absorbent sheet preferably have a length extending in the longitudinal direction of the absorbent layer 3 as shown in FIG. 3, and a plurality of the slits are preferably arranged in the longitudinal direction, and absorb the longitudinal alignment of the slits. It is more preferable to arrange a plurality of layers in the width direction of the layer 3. At this time, as described above, it is more preferable to make the distance between the notches in the longitudinal direction equal to or less than the length of the notches.

The formation of the incisions (slit portions 81) can be performed by a method generally used for this type of article. For example, a cutting blade extending in the circumferential direction is formed on the circumferential surface of the roll using a cutting device provided with cutter rolls distributed in the circumferential direction of the roll and in the roll axial direction, and an anvil roll correspondingly disposed. Can (not shown). The cutting blade has a circumferential length corresponding to the longitudinal length of the cut (slit portion 81). The cutting blades are dispersedly disposed on the roll circumferential surface in correspondence with the desired disposition of the notches (slit portions 81). Further, the depth of the cut can be set by the clearance between the cutter roll and the anvil roll, the size of the cutting blade, and the like.

Furthermore, when the raw material member used as the absorption layer 3 is an absorptive sheet member, it is preferable to have the following process.
That is, after the step (S1) and the step (S2), a step (S3) of folding the absorbent sheet member outside the width direction end of the position where the cooling agent is applied to form a laminated absorbent sheet Is preferred. As a result, the absorbent sheet 3 is obtained by folding the absorbent sheet into a laminated structure. By folding outside the width direction end of the cooling agent application position, the cooling agent is preferably contained in the region inside the width direction both end edges 39 of the absorbent layer 3 as described above.
Further, by folding the absorbent sheet in the step (S3), it is possible to suppress excessive exudation of the cooling agent in the width direction in the process of production, which is preferable. Further, as the absorbent sheet is folded to form a laminated structure, as described above, it becomes an absorbent article which can effectively maintain a proper cooling sensation effect on the skin exerted by the action of the divided portion. preferable.

In the step (S3), it is more preferable to set the position in the width direction in which the absorbent sheet is folded to the outer side than the width direction end of the divided portion 8 area.

The laminated structure in which the absorbent sheet is folded can be in various modes such as two-fold, three-fold, and the like. It is preferable to overlap the width direction both ends of an absorptive sheet as a three-fold. Thereby, it is easy to form a pool of the volatile component of the cooling agent, and the feeding to the skin by the dividing portion 8 can be made more effective. At this time, it is more preferable to fold the absorbent sheet with the cooling agent coated surface outward. In addition, when the absorbent sheet has the polymer rich area 35 and the fiber rich area 36 as described above, the cooling agent is applied to the fiber rich area 36 and the area coated with the cooling agent for the fiber rich area 36 is It is further preferred to fold outward.

Further, as the absorbent sheet, plural types of sheets having different widths may be used.
For example, as shown in FIG. 2, the central absorbent sheet 32 may be enclosed inside the folded structure of the main absorbent sheet 31 by using two types of absorbent sheets having different widths. At that time, the cooling agent in the step (S1) may be applied to any absorbent sheet. However, from the viewpoint of making the suppression of the exudation of the cooling agent in the thickness direction and the long and effective maintenance of the cooling sensation effect by the action of the dividing portion 8 more excellent, the main absorbent sheet 31 becomes wide It is preferable to apply a cooling agent to the absorbent sheet of

The front surface layer 1 and the back surface layer 2 which are cut into a predetermined size are laminated and bonded on both surfaces of the absorbent layer 3 obtained as described above to produce an absorbent article. At that time, if necessary, the intermediate fiber layer 4 and the side sheet 5 may be formed into a predetermined size and shape and laminated. In addition, various squeezing treatments such as leak prevention grooves may be performed.

What is used for the article of this kind can be used without particular limitation as a forming material of the member constituting the napkin 10.

As a cooling agent, it can stimulate the wearer's skin and / or mucous membrane surface thermoreceptor to convey a feeling of exhilaration to the wearer without changing the temperature on the skin and / or mucous membrane surface Various agents can be used. Examples thereof include cyclohexyl derivatives, cyclohexanol derivatives, carboxamides and the like, as described in paragraphs [0006] to [0086] of JP-A-2015-12918. Among them, water-insoluble or poorly water-soluble ones are preferable from the viewpoint of refreshing feeling and quick action and persistence due to odor. Since the water-insoluble or poorly water-soluble cooling agent hardly migrates to the non-skin side with the body fluid, the cold feeling tends to be sustained. Menthyl lactate and menthol are preferred as water insoluble or poorly water soluble ones. The term "water-insoluble or poorly water-soluble" as used herein means that the solubility is 1 g or less in 1 L of water at 25 ° C, and particularly "water-insoluble" is 0.1 g or less in 1 L of water at 25 ° C Say that it is soluble in water.
A cooling agent can be contained in the napkin 10 by various methods. For example, they may be contained in the napkin 10 in a state of being dissolved in a solvent, or may be contained without using a solvent. In addition, the cooling agent may be contained in the napkin 10 together with a delivery means such as encapsulation in microcapsules. As the solvent, various ones commonly used can be adopted. For example, dipropylene glycol and the like can be mentioned.

As a cooling agent, in particular, it is preferable to include menthol and menthyl lactate because the cooling effect can be felt quickly and gently after wearing, and the durability can be enhanced. From the same viewpoint, the content ratio of menthol and menthyl lactate is preferably 0.01 or more, more preferably 0.02 or more, and further preferably 0.2 or less, in the mass ratio of the former / the latter. The following are preferred.

As a hydrophilic fiber which comprises the absorption layer 3, what carried out the hydrophilization treatment of the hydrophobic fiber, and the thing which itself is hydrophilic are mentioned. In particular, those which themselves are hydrophilic and have water retention are preferred. As the latter hydrophilic fibers, natural fibers, regenerated cellulose fibers or semi-synthetic fibers are mentioned as preferable examples. As the hydrophilic fiber, in particular, pulp and rayon are preferable, and pulp is more preferable. Further, crosslinked cellulose fibers obtained by crosslinking the intramolecular and / or intermolecular of cellulose fibers or bulky cellulose fibers obtained by mercerizing wood pulp may be used. Examples of the pulp include wood pulp such as softwood kraft pulp and hardwood kraft pulp, and natural cellulose fibers such as cotton pulp and straw pulp, but not limited thereto. These pulps can be used alone or in combination of two or more.

The superabsorbent polymer material 37 constituting the absorbent layer 3 is obtained, for example, by polymerizing a water-soluble ethylenically unsaturated monomer which is mainly composed of acrylic acid or an acrylate and optionally added with a crosslinking agent. Hydrogel materials that can be used. Also, polyethylene oxide, polyvinyl pyrrolidone, crosslinked products of sulfonated polystyrene and polyvinyl pyridine, saponified starch-poly (meth) acrylonitrile graft copolymer, starch-poly (meth) acrylic acid graft copolymer, starch-poly ( The hydrolyzate of a (meth) acrylic ester graft copolymer etc. are mentioned. These superabsorbent polymer materials can be used alone or in combination of two or more. As the superabsorbent polymer material, a material capable of absorbing and retaining pure water of 20 times or more, particularly 50 times or more of its own weight and capable of gelation is preferable.
As the shape of the superabsorbent polymer material 37, various materials used for the absorbent layer 3 can be used without particular limitation. For example, spherical shape, granular shape, fibrous shape, bowl shape, lump shape etc. are mentioned.

The surface layer 1 can use various sheets having liquid permeability. In consideration of the goodness of the touch, a hydrophilic non-woven fabric is preferable, a thermal bond non-woven fabric is more preferable, and an air-through non-woven fabric is particularly preferable. The fiber constituting the nonwoven fabric of the surface layer 1 is preferably a thermoplastic resin fiber subjected to hydrophilization treatment, and the fiber is preferably a fiber subjected to a three-dimensional crimp such as a secondary crimp or a tertiary crimp. . Specifically, the fibers constituting the non-woven fabric of the surface layer 1 are polyethylene, polypropylene, polyester, nylon, and various composite fibers before being cut into a predetermined length to form staples. It is hydrophilized by applying a hydrophilizing agent. As the hydrophilizing agent, various alkyl sulfonates represented by α-olefin sulfonate, acrylate, acrylate / acrylamide copolymer, ester amide, ester amide salt, polyethylene glycol and derivatives thereof, water-soluble Hydrophilization treatment with a commonly used hydrophilizing agent can be used, such as polyester resin, various silicone derivatives, various saccharide derivatives, and mixtures thereof.

As the back surface layer 2, various materials having leak resistance can be used. For example, a non-moisture permeable or moisture-permeable film alone, or a combination of a film and a non-woven fabric, or a water-repellent non-woven fabric (SMS, SMMS, etc.) can be used. It is most preferable to use a non-moisture-permeable film alone as the leak-proof material from the viewpoint of cost and matching with the anti-slip adhesive.

The intermediate fiber layer 4 is preferably one having hydrophilicity and excellent in liquid diffusibility. Non-woven fabrics containing thermoplastic fibers can be mentioned. As the non-woven fabric, non-woven fabrics obtained by various manufacturing methods can be used. For example, an air through non-woven fabric in which heat fusion points of fibers are formed by air through method on a fiber web obtained by card method or air laid method, heat fusion points of fibers are formed by heat roll method on a fiber web obtained by card method Various non-woven fabrics such as heat-roll non-woven fabric, heat-embossed non-woven fabric, spunlace non-woven fabric, needle punched non-woven fabric, resin-bonded non-woven fabric, etc. can be used.

The side sheet 5 is preferably a water repellent non-woven fabric, and non-woven fabric manufactured by the card method, spun bonded non-woven fabric, meltblown non-woven fabric, spun lace non-woven fabric, heat roll non-woven fabric, needle punched non-woven fabric, etc. Various non-woven fabrics treated with water can be used. Particularly preferably, for example, a spunbond nonwoven fabric, a spunbond-meltblown (SM) nonwoven fabric, a spunbond-meltblown-spunbond (SMS) nonwoven fabric and the like are used.

The absorbent article of the present invention is not limited to the sanitary napkin of the above embodiment, and can be applied to, for example, panty liners, incontinence pads, urine collecting pads, disposable diapers and the like. Moreover, it is effective not only to menstrual blood but also to other things such as urine, orimono, soft stools and the like. In addition to the components described above, members may be incorporated appropriately in accordance with the application and function.

When the absorbent article of the present invention is a product such as a sanitary napkin or a panty liner which is carried in a bag for each product, it is preferable to be individually packaged. Specifically, it is preferable that the absorbent article packaging body is longitudinally folded so that the surface layer is inside, and is wrapped by the outer wrapping material for individual wrapping. By using the individual package, it is possible to make the article highly portable while protecting the hygiene of the surface layer (use side) that touches the skin, and it is possible to enhance the convenience of the user.

With regard to the embodiments described above, the present invention further discloses the following absorbent article, absorbent article individual packaging and method of manufacturing the absorbent article.

<1>
It has a surface layer and an absorbent layer, and has a longitudinal direction corresponding to the direction connecting the belly side, crotch portion and back side of the wearer, and a width direction orthogonal to the longitudinal direction, along the longitudinal direction An absorbent article having a front part, a rear part, and a middle part located between the front part and the rear part and including an area corresponding to a discharge point,
The absorbent layer or a member on the surface layer side of the absorbent layer has a region containing a cooling agent,
The absorbent article which equips the position which overlaps with the field which includes the cooling agent in a division part in the absorption layer in a division part.

<2>
The said split part is an absorbent article as described in said <1> distribute | arranged in multiple numbers as a slit part.
<3>
The absorbent article as described in said <2> whose width | variety of the said slit part is 0.5 mm or less, Preferably it is 0.3 mm or less, More preferably, it is 0.2 mm or less.
<4>
The absorbent article according to any one of <1> to <3>, wherein the dividing portion is disposed in an area inside the both widthwise end edges of the absorbent layer.
<5>
The plurality of divided portions have a length extending in the vertical direction and are arranged in plurality in the vertical direction, and an interval between the divided portions is equal to or less than a length of the divided portions. The absorbent article according to any one of the above.
<6>
The cooling agent is contained in a region on the skin surface side of the absorption layer and inside the both widthwise end edges of the skin surface, in any one of <1> to <5>. The absorbent article as described.
<7>
In any one of the above <1> to <6>, a region having a smaller amount of cooling agent basis weight than the surrounding is provided at the center in the width direction of the middle portion of the absorbent article in the region containing the cooling agent. The absorbent article as described.
<8>
A side sheet extending in the longitudinal direction across the widthwise end edges of the absorbent layer is disposed on the skin surface side of the surface layer, and at least the middle portion, the widthwise inner end of the side sheet is the outermost in the width direction The absorbent article according to any one of the above <1> to <7>, which is located at the outer side in the width direction than the dividing part located.
<9>
The absorbent article according to <8>, wherein the side sheet has lower air permeability than the surface layer.
<10>
The absorbent article according to any one of the above <1> to <9>, wherein the absorbent layer is composed of a superabsorbent polymer material and an absorbent sheet containing hydrophilic fibers.
<11>
The absorbent article according to <10>, wherein the absorbent layer is a structure in which the absorbent sheet is laminated.
<12>
In the cross-sectional view, the absorbent layer has a polymer-rich region in which the mass ratio of the superabsorbent polymer material to the total mass of the mass of the superabsorbent polymer material and the mass of the hydrophilic fibers is relatively high, and the mass ratio is relative The absorbent article according to <10> or <11>, comprising: an extremely low fiber-rich region.
<13>
The absorbent article according to <12>, wherein the fiber-rich region has a region containing the cooling agent, and the region containing the cooling agent is disposed on the most surface layer side of the absorbent layer.
<14>
The absorbent article according to any one of <1> to <13>, having an intermediate fiber layer in a portion overlapping with the region containing the cooling agent in plan view between the surface layer and the absorption layer .
<15>
The absorbent article according to <14>, wherein the surface layer and the intermediate fiber layer are joined by a plurality of longitudinally extending adhesives intermittently arranged in the width direction.
<16>
The absorbent article according to <14> or <15>, wherein the intermediate fiber layer and the absorbent layer are joined by a plurality of longitudinally extending adhesives intermittently arranged in the width direction.
<17>
The absorbent article as described in said <16> whose ratio of the area where the said adhesive agent is allocated to the skin surface side surface area of the said absorption layer is 10% or less.
<18>
The absorbent article according to any one of <14> to <17>, wherein the intermediate fiber layer is composed of a non-woven fabric containing thermoplastic fibers.
<19>
The absorbent article according to any one of <14> to <18>, wherein the intermediate fiber layer has a higher fiber density than the surface layer.
<20>
The absorbent article according to any one of <10> to <19>, wherein the absorbent layer is formed into a laminated structure by folding the absorbent sheet.
<21>
The absorbent article according to any one of <1> to <20>, wherein the absorbent layer comprises a high basis weight portion thicker than the periphery at a widthwise center of the middle portion of the absorbent article.
<22>
The absorbent layer has a laminated structure of a main absorbent sheet and a central absorbent sheet narrower than the main absorbent sheet disposed on the non-skin side of the main absorbent sheet, and the main absorbent sheet and The absorbent article as described in said <21> which the overlap part with a central absorbent sheet has comprised the said high basis weight part.
<23>
The absorbent article according to any one of <1> to <22>, wherein the absorbent article is a sanitary napkin or a panty liner.
<24>
The absorbent article individual packaging body in which the absorbent article according to any one of <1> to <23> is folded in the longitudinal direction so that the surface layer is inside and is wrapped by an outer wrapping material.
<25>
A process of applying a cooling agent over a predetermined width of the raw material member to be an absorption layer, and extending in the longitudinal direction of the absorption layer on a surface of the raw material member to be an absorption layer over a width wider than the cooling agent application width And a step of providing a divided portion region.
<26>
The manufacturing method of the absorbent article as described in said <25> in which the process of apply | coating the said cooling agent is performed after the process of providing the said parting part area | region.
<27>
The manufacturing method of the absorbent article according to <25> or <26>, wherein the step of providing the divided portion region is a step of providing a plurality of cuts in a predetermined region of the absorbent sheet in a distributed manner in the plane direction. .
<28>
The raw material member to be the absorbent layer is an absorbent sheet member, and after the step of applying the cooling agent and the step of providing the divided portion region, the width of the position at which the cooling agent is applied to the absorbent sheet member The method for producing an absorbent article according to any one of the above <25> to <27>, comprising the step of forming a laminated absorbent sheet by folding outside the direction end.

While the present invention has been described in conjunction with its embodiments and examples, it is not intended to limit our invention in any detail of the description unless otherwise specified, and the spirit of the invention as set forth in the appended claims. We believe that it should be interpreted broadly without violating the scope.

Reference Signs List 1 front surface layer 2 back surface layer 3 absorbent layer 4 intermediate fiber layer 5 side sheet 6 wing portion 8 divided portion 10 sanitary napkin

Claims

It has a surface layer and an absorbent layer, and has a longitudinal direction corresponding to the direction connecting the belly side, crotch portion and back side of the wearer, and a width direction orthogonal to the longitudinal direction, along the longitudinal direction An absorbent article having a front part, a rear part, and a middle part located between the front part and the rear part and including an area corresponding to a discharge point,
The absorbent layer or a member on the surface layer side of the absorbent layer has a region containing a cooling agent,
The absorbent article which equips the position which overlaps with the field which includes the cooling agent in a division part in the absorption layer in a division part.
The absorbent article according to claim 1, wherein a plurality of the dividing portions are disposed as a slit portion.
The absorptive article according to claim 2 whose width of said slit part is 0.5 mm or less.
The absorbent article according to any one of claims 1 to 3, wherein the dividing portion is disposed in an area inside the both widthwise end edges of the absorbent layer.
The plurality of dividing portions are arranged in the vertical direction with a length extending in the vertical direction, and a distance between the dividing portions is equal to or less than a length of the dividing portions. The absorbent article according to item 1.
The said cooling agent is a skin surface side of the said absorption layer, Comprising: The area | region inside the width direction both-ends edge of this skin surface side is contained in any one of Claims 1-5. Absorbent article.
The region according to any one of claims 1 to 6, wherein the region containing the cooling agent has a region having a smaller cooling agent basis weight than the surrounding at the center in the width direction of the middle part of the absorbent article. Absorbent article.
A side sheet extending in the longitudinal direction across the widthwise end edges of the absorbent layer is disposed on the skin surface side of the surface layer, and at least the middle portion, the widthwise inner end of the side sheet is the outermost in the width direction The absorbent article according to any one of claims 1 to 7, which is located at the outer side in the width direction than the dividing portion located.
The absorbent article according to claim 8, wherein the side sheet has lower air permeability than the surface layer.
The absorbent article according to any one of claims 1 to 9, wherein the absorbent layer comprises an absorbent sheet comprising a superabsorbent polymer material and hydrophilic fibers.
The absorbent article according to claim 10, wherein the absorbent layer has a structure in which the absorbent sheet is laminated.
In the cross-sectional view, the absorbent layer has a polymer-rich region in which the mass ratio of the superabsorbent polymer material to the total mass of the mass of the superabsorbent polymer material and the mass of the hydrophilic fibers is relatively high, and the mass ratio is relative The absorbent article according to claim 10 or 11, comprising a fiber-rich region that is as low as possible.
The absorbent article according to claim 12, wherein the fiber rich region has a region containing the cooling agent, and the region containing the cooling agent is disposed on the most surface layer side of the absorbent layer.
The absorbent article according to any one of claims 1 to 13, wherein an intermediate fiber layer is provided between the surface layer and the absorbent layer in a portion overlapping with the region containing the cooling agent in plan view.
The absorbent article according to claim 14, wherein the surface layer and the intermediate fiber layer are joined by a plurality of longitudinally extending adhesives intermittently arranged in the width direction.
The absorbent article according to claim 14 or 15, wherein the intermediate fiber layer and the absorbent layer are joined by a plurality of longitudinally extending adhesives intermittently arranged in the width direction.
The absorbent article according to claim 16, wherein the ratio of the area where the adhesive is disposed to the skin surface side surface area of the absorbent layer is 10% or less.
The absorbent article according to any one of claims 14 to 17, wherein the intermediate fiber layer comprises a non-woven fabric containing thermoplastic fibers.
The absorbent article according to any one of claims 14 to 18, wherein the intermediate fiber layer has a higher fiber density than the surface layer.
The absorbent article according to any one of claims 10 to 19, wherein the absorbent layer has a laminated structure in which the absorbent sheet is folded.
The absorbent article according to any one of claims 1 to 20, wherein the absorbent layer comprises a high basis weight portion thicker than the periphery at the widthwise center of the middle portion of the absorbent article.
The absorbent layer has a laminated structure of a main absorbent sheet and a central absorbent sheet narrower than the main absorbent sheet disposed on the non-skin side of the main absorbent sheet, and the main absorbent sheet and The absorbent article according to claim 21, wherein an overlapping portion with the central absorbent sheet constitutes the high basis weight portion.
The absorbent article according to any one of claims 1 to 22, wherein the absorbent article is a sanitary napkin or a panty liner.
The absorbent article individual packaging in which the absorbent article according to any one of claims 1 to 23 is folded in the longitudinal direction so that the surface layer is inside and is covered by an outer wrapping material.
A process of applying a cooling agent over a predetermined width of the raw material member to be an absorption layer, and extending in the longitudinal direction of the absorption layer on a surface of the raw material member to be an absorption layer over a width wider than the cooling agent application width And a step of providing a divided portion region.
The method for manufacturing an absorbent article according to claim 25, wherein the step of applying the cooling agent is performed after the step of providing the parting region.
The method of manufacturing an absorbent article according to claim 25 or 26, wherein the step of providing the divided portion region is a step of providing a plurality of cuts in a predetermined region of the absorbent sheet in a distributed manner in the plane direction.
The raw material member to be the absorbent layer is an absorbent sheet member, and after the step of applying the cooling agent and the step of providing the divided portion region, the width of the position at which the cooling agent is applied to the absorbent sheet member The method of manufacturing an absorbent article according to any one of claims 25 to 27, comprising the step of forming a laminated absorbent sheet by folding outside the direction end.