JP2019084141A - Absorbent article - Google Patents

Abstract

To provide an absorbent article for controlling a diffusion direction of a cool feeling agent in an absorbent article to which a cool feeling agent solution is applied, for exhibiting preferably, a cool feeling effect.MEANS: There is provided an absorbent article comprising: a front surface layer 1; a rear surface layer 2; and an absorbent layer 3, the absorbent article comprising a vertical direction corresponding to a direction where a ventral part, a crotch part and a back side part of a wearer are connected, and a width direction orthogonal to the vertical direction. In the absorbent article, leakage prevention grooves 7 are arranged in a vertical direction sandwiching a liquid reception region C1 in plan view, the absorbent article 3 comprises a slit part 8 on an inside region sandwiched by the leakage prevention grooves 7 in plan view. A cool feeling agent is included in a region on a non-skin face side of the front surface layer 1 on the absorbent article, and a region 21 in which the cool feeling agent is included, is overlapped to the slit part 8, or both of the slit part 8 and the leakage prevention grooves 7 in plan view.SELECTED DRAWING: Figure 1

Description

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

  In an absorbent article such as a sanitary napkin, the wearer may feel uncomfortable due to occurrence of stuffiness and stickiness when the amount of excrement is large or when used for a long time. On the other hand, conventionally, there is a technique that attempts to improve the wearing feeling by including a cooling agent such as a refreshing agent in 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. Apart from this, Patent Document 3 describes a technique relating to an absorber including a functional material having a deodorizing function, an antibacterial function, an aroma function, a heat retaining function, and the like in addition to the water retention function.

JP, 2010-234031, A JP, 2010-234028, A JP, 2010-110443, A

  When a cooling agent is contained in the absorbent article, there is a technique of applying a solution (hereinafter, cooling agent solution) in which the cooling agent is dissolved in a solvent. In this case, in the application part of the cooling agent solution of the absorbent article, the cooling agent of the cooling agent solution diffuses in accordance with the penetration and diffusion of the solvent, so the cooling sensation effect at the targeted location is sufficient. It may not be exhibited.

  TECHNICAL FIELD The present invention relates to an absorbent article capable of suitably exerting a target cooling sensation effect by controlling the diffusion direction of a cooling agent in an absorbent article coated with a cooling agent solution.

The present invention comprises a front surface layer, a back surface layer, and an absorbent layer disposed between the front surface layer and the back surface layer, and corresponds to the direction connecting the belly side, crotch and back side of the wearer. An absorbent article having a longitudinal direction and a width direction orthogonal to the longitudinal direction, wherein the leak-barrier groove squeezed from the surface layer to the absorbent layer sandwiches the liquid-receiving area in plan view. The absorbent layer is provided with a slit portion in an inner region sandwiched between the leakproof grooves in a plan view and the non-skin surface side of the surface layer in the absorbent article An absorbent article, wherein a cooling agent is contained in the region, and the region containing the cooling agent overlaps with the slit portion or both the slit portion and the leakproof groove in plan view. I will provide a.
In the present invention, the process of applying the cooling agent over the predetermined width of the raw material member to be the absorption layer, and the process of applying the cooling agent on the surface of the raw material member to be the absorption layer are wider than the cooling agent application width. Providing a slit portion extending in the direction.

  The absorbent article which concerns on this invention can control the diffusion direction of a cooling agent, and can exhibit the cooling sensation effect of the aim suitably.

BRIEF DESCRIPTION OF THE DRAWINGS It is the 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. It is sectional drawing which showed typically the II-II line cross section of the sanitary napkin shown in FIG. It is a top view of an absorption layer. It is sectional drawing which showed the other preferable example of the folding structure of a central absorbent sheet. (A) is a perspective view schematically showing a preferable embodiment of forming a cooling agent application region in the step of applying a cooling agent in the method of manufacturing an absorbent article, and (B) is a manufactured physiological application In the absorption layer of a napkin, it is the top view which showed typically the preferable aspect of the area | region which contains a cooling agent, and (C) is the state by which the diffusion of a cooling agent was suppressed by the leak-proof groove and the absorptive slit part. It is a top view which shows typically. (A) is a top view which shows typically another preferable aspect of the area | region containing a cooling agent in the absorption layer of the manufactured sanitary napkin, (B) is a leak-proof groove | channel of the diffusion of a cooling agent. FIG. 6 is a plan view showing a state suppressed by the slit portion.

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 is disposed between the surface layer 1 on the skin contact surface side, the back surface layer 2 on the non-skin contact surface side, and the surface layer 1 and the back surface layer 2. And a liquid retaining absorbent layer 3. The surface layer 1 has the liquid permeability that sends the liquid to the absorbing layer 3, and the back surface layer 2 has the leak resistance to the liquid. The surface layer 1 and the back surface layer 2 have a size that extends outward of the outer edge of the absorbent layer 3 while covering both surfaces of the absorbent layer 3.
In the present embodiment, a liquid-permeable liquid diffusion layer 4 narrower than the absorption layer 3 is provided between the surface layer 1 and the absorption layer 3. The liquid diffusion layer 4 has an effect of spreading the waste fluid transmitted from the surface layer 1 in the planar direction to widen the absorption area on the skin surface side of the absorbing 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 the sheet, the outer peripheral edge of the napkin 10 has an outer peripheral seal portion 11 joined without interposing the absorbent layer 3.

  The napkin 10 has a leakproof groove 7 squeezed from the surface layer 1 to the absorbent layer 3. In addition, the napkin 10 may include other components or may not have the liquid diffusion layer 4 and the side sheet 5. Moreover, you may have several embossing etc. on the surface layer 1. FIG. Furthermore, while the side sheet 5 is joined to the surface layer 1, the free end may be left on the inner side of both sides of the surface layer 1, and an elastic member or the like may be disposed at the free end to prevent leakage. A cuff may be configured.

  The napkin 10 has a vertically-long shape in plan view, the longitudinal direction of which is the longitudinal direction (Y direction), and the direction orthogonal to the longitudinal direction is the width direction (X direction). 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 is a direction orthogonal to the longitudinal direction, and corresponds to a direction connecting the left and right legs in the crotch of the wearer. 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 a portion corresponding to the wearer's excretion point in the longitudinal direction. Furthermore, it has an anterior part F disposed on the lower abdomen side anterior to the intermediate part C, and a posterior part R disposed on the posterior 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. The "width direction central portion" where the liquid receiving area C1 exists is a range of a predetermined width extending laterally from the center line L in the width direction, as shown in FIG. The part of the inner range is said. 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% with respect to the absorbent layer width WA. 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 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 which is bent and fixed to the crotch portion of the shorts regardless of day or night, 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.

The napkin 10 has a leakproof groove 7 squeezed from the surface layer 1 to the absorbent layer 3 on the surface layer 1. The leakage preventing grooves 7 extend in a pair in the longitudinal direction (Y direction) across the liquid receiving area C1 in plan view. In the present embodiment, the leakage preventing groove 7 extends in the longitudinal direction (Y direction) from both sides of the liquid receiving area C1 at the middle portion C and is connected and annularly formed at the front portion F and the rear portion R Have. Furthermore, the leak-proof groove 7 has an arc-shaped portion in the front portion F and the rear portion R in the annular portion. The annular and arc-shaped leakproof grooves 7 are both symmetrical about the center line L in the width direction extending in the longitudinal direction of the napkin 10 as an axis.
The planar shape of the leakproof groove 7 may be formed by a continuous line, or may be a linear arrangement of intermittent squeezed portions. Intermittently means, for example, a dotted line, a dotted line (perforated), and the like. The leak prevention groove 7 may be disposed in a single layer or may be disposed in double or more.

  The leakproof groove 7 is formed, for example, by squeezing by embossing, and preferably functions to bond the surface layer 1, the liquid diffusion layer 4 and the absorbing layer 3 and to suppress the displacement of the respective members. On the other hand, the leakage preventing groove 7 squeezed by embossing has a higher density between the fibers at that portion, so that the capillary force is higher than the other non-squeezed portion. Therefore, even if the liquid excreted in the central liquid receiving area C1 diffuses and moves outward, the migration is blocked at the leakage prevention groove 7 and exudes outside the annular leakage prevention groove 7 Can be reduced.

  The napkin 10 contains a cooling agent in the region on the non-skin surface side of the surface layer 1. Here, the "region on the non-skin surface side of the surface layer" is a meaning including the non-skin surface side of the surface layer and members located on the non-skin surface side of the surface layer. In the present embodiment, the region 21 containing the cooling agent is disposed at least in the absorbing layer 3. In FIGS. 3, 5 and 6, the region 21 containing the cooling agent is shown as being present in the absorbing layer 3, but the present invention is not limited to this and the non-surface layer 1 is not It may be at any position in the region on the skin surface side. Moreover, in FIG. 3, 5 and 6, although it has shown so that the area | region 21 where the cooling agent was contained can be grasped so that the range can be grasped | ascertained, in an actual article, such a pattern is attached | subjected Do not mean. The cooling agent volatilizes and stimulates the temperature receptors on the wearer's skin and / or mucosal surface to cool and refresh the wearer without changing the temperature on the skin and / or mucosal surface. It is an agent that can make you feel a sense. The region 21 containing the cooling agent is located on a member located on the non-skin-contacting surface side of the surface layer 1 from the viewpoint of effectively maintaining the appropriate cooling sensation effect on the wearer's skin for a long time. preferable. 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. In addition, it is preferable that the region 21 containing the cooling agent be at least in the middle portion C in a plan view of the napkin 10.

  Next, the leakproof groove 7, the slit portion 8 and the region 21 containing the cooling agent in the absorption layer 3 will be described.

  The above-described leak-proof groove 7 is disposed in the absorbing layer 3. Thereby, the absorption layer 3 has a squeezed portion in the thickness direction at a position surrounding the both sides of the liquid receiving area C1 in the longitudinal direction.

The absorption layer 3 is provided with a slit portion 8 in an inner region sandwiched by the leakage preventing grooves 7 disposed in the longitudinal direction across the liquid receiving region C1 in plan view. Here, the “inner region” is a region on the inner side in the width direction than the leakproof groove 7 and does not include the leakproof groove 7. The "leak-proof groove 7" is defined as a portion including a recessed bottom, a member below the bottom, and a wall erected in the thickness direction from the bottom, and the "inner region" is a portion squeezed in the thickness direction. Is defined as a part not including Note that this definition method is similarly applied to the "outside region" described later. The slit portion 8 is a portion cut into a long and thin shape, and is a portion where the continuity of the constituent material of the absorbing layer 3 is broken.
The slits 8 have a length extending along the longitudinal direction of the absorbing layer 3, and a plurality of the slit portions 8 are distributed in the surface direction of the absorbing layer 3. From the viewpoint of controlling the diffusion of the cooling agent as described later, it is preferable that the slit portions 8 be dispersed and arranged in a region including at least the middle portion C in the longitudinal direction of the absorption layer 3.

  Various arrangements can be adopted without particular limitation as long as the dispersion arrangement of the slit portions 8 controls diffusion of a cooling agent described later. In the present embodiment, the plurality of slits 8 are spaced apart in the vertical direction, and the rows in the vertical direction are spaced apart in the width direction. From the viewpoint of effectively suppressing the diffusion of the cooling agent in the width direction, the distance between the slit portions 8 and 8 arranged in the longitudinal direction (the length in the longitudinal direction of the unslit portion sandwiched by the slit portions Is preferably as small as possible, and more preferably less than or equal to the longitudinal length of the slit portion 8. Moreover, it is preferable to make short the part continuous in the width direction in the area | region inside the leak-proof groove 7 of the part which is not slit. That is, it is preferable that the continuous part of the non-slit part be interrupted by the slit part at any position in the width direction.

  The "slit portion" referred to here is 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 8 refers to the distance (opening width) between the disconnected members in the direction orthogonal to the extending length direction of the slit portion 8 in a plan view of the napkin 10. The width of the slit portion 8 can be measured by a microscope in a natural state in which the absorbent layer 3 is taken out of the napkin 10 and placed on a horizontal table and tension is not applied. As a microscope, digital microscope VHX-1000 made from Keyence Inc. can be mentioned. At the time of measurement, the measurement magnification is appropriately adjusted.

  The length in the longitudinal direction of each slit portion 8 is preferably 10 mm or more, more preferably 15 mm or more, still more preferably 35 mm or more, and preferably 40 mm or less, from the viewpoint of effectively maintaining appropriate cooling sensation effect long. The following is more preferable, and 30 mm or less is more preferable.

  The slit portion 8 may have various depths in the thickness direction of the absorbing layer 3. For example, it may be a predetermined depth from the skin surface side, or may extend over the entire thickness direction of the absorbent layer 3. In consideration of the action of the slit portion 8 to the cooling agent described later, it is preferable that the slit portion 8 be disposed at least from the skin surface side of the absorbing layer 3 to a predetermined depth.

In the napkin 10, the region 21 containing the cooling agent overlaps the slit 8 or both the slit 8 and the leakproof groove 7 in plan view. Here, "overlap" means that, when the napkin 10 is viewed in plan, at least a part of the region 21 containing the cooling agent and the slit portion 8 is at the same position in the flat region, It is not limited to the same position in the thickness direction.
In the absorbent layer 3 around the slit portion 8 and the leakproof groove 7, the capillary force by the density gradient works, whereby the diffusion direction of the cooling agent can be controlled, and it becomes possible to provide a good cooling feeling when worn. Specifically, the longitudinally extending slit portion 8 and the leakage preventing groove 7 restrict the tendency of the cooling agent to spread in the width direction through the absorption layer 3, and Diffusion can be induced in the longitudinal direction. Thereby, the volatile component which a cooling agent volatilizes and generate | occur | produces can avoid a cool area | region which is sensitive to a wearer's irritation | stimulation sensitively near as much as possible, and can provide a cool feeling suitably to the part which is easy to be steamy. By controlling the diffusion direction of the cooling agent in this manner, it is possible to exert a good cooling effect on a predetermined part of the wearer. The effect mentioned above can exhibit the same effect, when a cooling agent transfers to the absorption layer 3, if the cooling agent is contained in the area | region of the non-skin surface side of a surface layer. However, when the absorption layer 3 contains a cooling agent, the diffusion direction of the cooling agent can be controlled more effectively, which is preferable.

  The region 21 containing the cooling agent may extend to an outer region located on the outer side in the width direction than the leakage preventing groove 7 as long as the above-mentioned action is suitably exhibited. Even if the region 21 containing the cooling agent does or does not extend to the outer region, it contains a larger amount of cooling agent in the inner region than the outer region in the width direction of the leakproof groove 7 Is preferred. The amount contained by the cooling agent as referred to herein is the “amount of cooling agent per unit area” measured by the method described below (the presence or absence of the cooling agent, and the method of measuring the content). Yes, also known as the basis weight of the cooling agent. Such a content is made possible by the diffusion control of the cooling agent by the slit portion 8 and the leakage preventing groove 7. In addition, the "outside area | region" said here is an area | region which does not contain the leak-proof groove 7, and exists in the width direction outward rather than the leak-proof groove 7. As shown in FIG.

From the viewpoint of making the above-mentioned operation more effective, it is preferable that the slit portion 8 and the leak-proof groove 7 be in contact with each other in part. As used herein, "in contact with" means that a part of the slit portion 8 overlaps with the depressed portion where the absorbent layer 3 of the leakproof groove 7 is squeezed.
By this, the diffusion direction can be controlled by the slit portion 8 before the cooling agent diffuses to the outside of the leakproof groove 7. At the same time, when the napkin 10 is worn, the opening of the slit 8 does not open too much even when external pressure is generated, and excessive volatilization of the cooling agent from the opening of the slit 8 can be suppressed. The feeling can be given to the skin more effectively. And it is possible to further improve the control accuracy in which the cooling agent is contained more in the inner region than the outer region in the width direction of the leakproof groove 7.

  Moreover, it is preferable that at least front and rear ends of the slit portion 8 be in contact with the leakproof groove 7. In this case, it is preferable that not all of the plurality of slits 8 but some of the slits 8 have front and rear ends in contact with the leakproof grooves 7. In addition, the slit portion 8 in which the front and rear end portions are in contact with the leakproof groove 7 may be in contact with the leakproof groove 7 in portions other than the front and rear end portions. Here, as shown in FIG. 3, the “front and rear ends” of the slit portion 8 are end portions 88 of the tip extending in the longitudinal direction. Thereby, the cooling agent which is diffused in the vertical direction along the slit portion 8 and accumulated at the front and rear ends can be more effectively held in the high density region where the slit portion 8 and the leakage preventing groove 7 overlap. As a result, it is possible to more effectively suppress the diffusion of the leakproof groove 7 to the outer region, and to more effectively provide appropriate cooling sensation at a desired position.

When the region 21 containing the cooling agent is in the absorbing layer 3, the cooling agent is preferably included in the region excluding both sides in the width direction on the skin surface side of the absorbing layer 3. Thereby, the volatile component of the cooling agent can be effectively transferred to the skin while avoiding the area around the buttocks of the wearer. At that time, the cooling agent is volatilized from the slit portion 8 disposed in the inner region of the leakproof groove 7, and a cooling sensation can be effectively imparted to the skin of the wearer.
The "skin surface side of the absorption layer 3" referred to here means a region on the skin surface side when the thickness of the absorption layer 3 is divided into two equal parts (the same applies hereinafter). Moreover, it is preferable that "an area | region except width direction both sides" is an area which avoided the vicinity of the buttocks part of a wearer's skin. “Both sides in the width direction” means a predetermined area from the both end edges 3E in the width direction of the absorption layer 3 and is preferably the outer area of the leakproof groove 7. When the distance is 1, it is preferable that the region is within 0.3 of the both end edges 3E in the width direction, particularly within 0.5, and particularly within 0.8. Specifically, it is preferable that the region 21 containing the cooling agent is on the skin surface side of the absorbing layer 3 in the inner region of the leakproof groove 7 including the liquid receiving region C1.

  When the cooling agent is contained on the skin surface side of the absorption layer 3, the cooling agent may be contained on the non-skin surface side of the absorption layer 3. 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, a cooling agent may be contained in the member by the side of surface layer 1 rather than absorption layer 3 other than absorption layer 3, and it does not need to be contained.

From the viewpoint that the cooling agent is contained in the region excluding both sides in the width direction of the absorption layer 3, the application portion of the cooling agent solution is disposed in the inner region of the leakage preventing groove 7 in the width direction of the middle portion C. It is preferable to do. It is more preferable to arrange | position to the "width direction center part" in which the liquid reception area | region C1 mentioned above also exists among this area | region. In this case, if the application part of the cooling agent solution is disposed in the inner area of the leakproof groove 7 and the liquid receiving area C1 in the width direction of the absorbing layer 3 in the middle part C, the front part F and the rear part It may extend to R and be disposed longitudinally beyond the leakproof groove 7. Here, the “cooling agent solution” is a coating liquid in which a cooling agent and a solvent are mixed, and is a liquid used when being contained in the napkin 10. The portion to which the cooling agent solution is applied is a portion to be initially contained in the manufacturing process, and in the napkin 10 as a product, as described above, the portion having the largest amount of cooling agent (the portion having a large contained basis weight) Become. As the solvent, various ones commonly used can be adopted. For example, dipropylene glycol and the like can be mentioned.
The presence or absence and content of a cooling agent are measured by the following method. In that case, it can measure with respect to the whole absorption layer 3, and only the skin surface side of the thickness direction of the absorption layer 3 can be cut out and measured. Moreover, when the absorption layer 3 has a layer structure, it can measure for every layer and every other member.

(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. In addition, the amount of cooling agent per unit area (the basis weight of the cooling agent) is determined by dividing the obtained amount of menthyl lactate and / or menthol amount by the area of the target member or target portion collected in advance. Can. In order to know the amount of cooling agent for each target member or target portion of the product, analysis can be performed by decomposing the product in a chamber at 5 ° C. and removing the material portion to be measured. 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.

  On the skin surface side of the absorption layer 3, in the middle portion C in the longitudinal direction (Y direction), there is a region where the basis weight (the amount of the cooling agent per unit area; the same applies hereinafter) of the cooling agent is smaller than the surroundings. Is preferred. Furthermore, on the skin surface side of the absorption layer 3, it is more possible to have a region having a smaller cooling agent basis weight than the surrounding (outside of the liquid receiving area C1) in the width direction center (liquid receiving area C1) of the middle part C preferable. By this, it is possible to appropriately suppress the basis weight of the cooling agent with respect to the excretory part sensitive to the stimulation of the wearer and to suppress that the cold feeling becomes too strong. Thus, from the viewpoint of suppressing excessive stimulation to the skin, the “region having a small cooling agent basis weight” is preferably a region extending in the planar direction of the absorbing layer 3 close to the surface layer 1.

Furthermore, in the inner region of the leakproof groove 7 of the absorbing layer 3, the basis weight of the cooling agent in the slit portion 8 is larger than the basis weight of the cooling agent in the non-slit region 9 of the absorbing layer 3. Is preferred. The “non-slit region 9” referred to here is a region in which the slit portion 8 is not disposed in the inner region of the leakproof groove 7 of the absorption layer 3.
The influence of external pressure on the inner region of the leakproof groove 7 of the absorption layer 3 is suppressed, and the opening of the slit portion 8 disposed there is prevented from opening too much. By increasing the basis weight of the cooling agent in the slit portion 8 as described above, an appropriate cooling sensation effect through the opening can be maintained for a long time.

In the napkin 10, the cooling agent is effectively sent out to the skin surface direction even if the remaining amount is reduced by the action of the slit portion 8, so it is not necessary to increase the content excessively. Therefore, it is possible to suppress the stimulation on the skin while maintaining the same content as in the conventional case, and to effectively maintain an appropriate cooling sensation effect for a long time.
Specifically, in the case of menthyl lactate, for example, in the case of menthyl lactate, the content of the cooling agent in the whole of the absorption layer 3 feels a good sense of coldness and reduces the mure and sticky feeling. On the other hand, 4 mg / 100 mm or more is preferable, 5.0 mg / 100 mm or more is more preferable, and 6.5 mg / 100 mm or more is still more preferable. And, from the viewpoint of suppressing the stimulation to the skin, the content basis weight of the cooling agent 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.
In the case where 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 “region having a basis weight of the cooling agent smaller than that of the surroundings” is included in the liquid diffusion layer 4 The basis weight of the cooling agent contained in the region where the basis weight of the photosensitive agent is small is preferably 85% or less of the basis weight of the cooling agent contained in the other region, and is 75% or less Is more preferable, and 65% or less is even more preferable.

  Next, a preferable specific structure of the absorption layer 3 will be described.

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-mentioned actions by the slit portion 8 and the leakage preventing groove 7 are exhibited. 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 material can be integrated using the adhesive force developed by wetting, the binder added separately, and the binder such as the adhesive fiber. The preparation can be performed by various methods commonly used, and may be either wet or dry.
The absorbent sheet has high absorbency, which is difficult to cause 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, the thing as described in stage-of Unexamined-Japanese-Patent No. 8-246395, etc. are 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 slit part 8 in a desired position, and it can reinforce | strengthen cold sensation provision in a desired position.

  The absorbent layer 3 preferably has a laminated structure in which the absorbent sheet is folded. 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 absorbent 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 slit portion 8, and a proper cooling sensation Can make you feel longer.

  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 is easily diffused in the surface direction of the folded sheet layer, and the cooling agent is more effectively suppressed from exuding in the thickness direction to the non-skin surface side of the absorbing layer 3 Can. It is preferable that the leakage preventing groove 7 described above be disposed in the main absorbent sheet 31.

  The main absorbent sheet 31 extends outward from at least a part of the periphery of the central absorbent sheet 32 and is laminated to the central absorbent sheet 32. A more specific configuration will be described below.

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 disposed closer to the non-skin surface than at least the skin surface of the main absorbent sheet 31. In addition, the central absorbent sheet 32 is preferably located in the middle of the napkin 10.

The absorbent layer 3 has the central absorbent sheet 32 in the above-described laminated structure, and thereby has a high basis weight portion thicker than the periphery at the center in the width direction of the middle portion C. At the position of the high basis weight portion, 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 a high basis weight part. 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.
Also, if there is a laminated structure of the central absorbent sheet 32 and the main absorbent sheet 31 in the region of the middle part C, the contained cooling agent is dispersed in each layer, and the basis weight of the cooling agent on the skin surface side Can be less than the surroundings.

The ratio (H2 / H1) of the thickness (H1) of the high basis weight portion to the thickness (H2) of the portion other than the high basis weight portion in the absorbent layer 3 is from the viewpoint of being usable without discomfort to the skin surface 1/5 or more is preferable and 1/3 or more is preferable. The ratio (H2 / H1) is preferably 4/5 or less, more preferably 2/3 or less, from the viewpoint of fit.
In the absorbent layer 3, the ratio (M2 / M1) of the basis weight (M1) of the high basis weight part to the basis weight (M2) of the part other than the high basis weight part is the viewpoint of liquid diffusion prevention Therefore, 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. 4 (A) to 4 (D). FIG. 4A shows a mode in which both ends in the width direction of the central absorbent sheet 32 are folded back in the S-shape on the skin surface side and the non-skin surface side, respectively. FIG. 4B shows an aspect in which the sheet is folded in half in the width direction. FIGS. 4 (C) and 4 (D) show an embodiment folded so that the lengths of the three-folded portions in the width direction become equal.

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. 4A to 4D 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 slit 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, it is possible to more easily express the feeding of the volatile component of the cooling agent to the skin through the slit portion 8.

In such a laminated structure of the absorption layer 3, it is preferable that the slit portion 8 penetrate at least one layer because it is easy to send the volatile component of the cooling agent to the skin. From the same viewpoint, it is more preferable to penetrate the layer on the outermost surface of the skin surface side of the absorbent layer 3. Specifically, it is preferable to penetrate the layer on the skin surface side portion 31A of the main absorbent sheet 31 constituting the absorbent layer 3.
In the present embodiment, the slit portion 8 is formed to penetrate the entire thickness of the absorbing layer 3. In the high basis weight portion, the slit portion 8 penetrates 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, the slit portion 8 penetrates the entire laminated portion of the main absorbent sheet 31. This is preferable because deformation in the axis of the slit portion 8 of the absorbing layer 3 and opening and closing of layers can be more reliably generated in any of the high basis weight portion and the portion other than the high basis weight portion.

  The slit portion 8 is preferably disposed at least in a high basis weight portion in which the central absorbent sheet 32 and the main absorbent sheet 31 are stacked in the inner region of the leakproof groove 7.

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 of applying a cooling agent over a predetermined width of the raw material member to be the absorption layer (S1) and the surface of the raw material member to be the absorption layer extend in the longitudinal direction to a region wider than the cooling agent application width. And a step (S2) of forming a slit portion area 8A in which the slit portion 8 is disposed.

In the step (S1), the cooling agent application width WC to which the cooling agent is applied is preferably a region which is inside the both widthwise end edges 3E of the absorption layer 3 described above. This range is, for example, 75% or less, preferably 70% or less, with respect to the absorption layer width WA (see FIG. 1). As described above, the cooling agent is prepared and applied as a cooling agent solution (coating solution) mixed with a solvent. 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 slit portion region 8A forming the slit portion 8 is wider than the cooling agent application width WC, and is inside the both widthwise edges 3E of the absorption layer 3 described above, It is preferable that the region be the inside of the leakproof groove 7. It is more preferable that the region be in the range of, for example, 85% or less with respect to the absorption layer width WA. Moreover, when forming the leak-proof groove 7 so that it may mention later, it is preferable to distribute | arrange so that the slit part 8 and the leak-proof groove 7 may contact | connect in part.
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 absorption layer.

  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 both widthwise end edges 3E is suppressed more reliably, which is preferable.

  It is preferable to use an absorptive sheet as a raw material member used as an absorption layer. As the absorbent sheet, one wider than the width of the absorbent layer is used assuming that it is folded. A plurality of cuts (slit portions) are provided in a distributed manner in the surface direction in a predetermined area of the absorbent sheet. As shown in FIG. 3, the slits provided in the absorbent sheet preferably have a length extending in the longitudinal direction of the absorbent layer, and a plurality of the slits are preferably arranged in the longitudinal direction. It is more preferable to arrange multiple in the width direction of. 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 (slits) can be carried out by methods commonly 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). The cutting blades are distributed at the peripheral surface of the roll in correspondence with the desired arrangement of the notches (slits). 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 an absorption layer is an absorptive sheet, it is preferable to have the following processes.
That is, after the step (S1) and the step (S2), it is preferable to include a step (S3) of folding the absorbent sheet outside the widthwise end of the cooling agent application position to form a laminated absorbent sheet. Thereby, an absorbent layer is obtained by folding the absorbent sheet into a laminated structure. By folding outside the width direction end of the cooling agent application position, as described above, it becomes a cooling agent region in which the cooling agent is contained in the region inside the width direction both end edges of the absorbent layer, which is preferable.
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 production process. Further, as the absorbent sheet is folded to form a laminated structure, as described above, the absorbent article can effectively maintain an appropriate cooling sensation effect on the skin exerted by the action of the slit portion for a longer period of time. Can.

  In the step (S3), it is more preferable that the position in the width direction in which the absorbent sheet is folded is outside the width direction end of the slit portion region.

  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. By this. It is easy to form a pool of the volatile component of the cooling agent, and the feeding to the skin by the slit portion can be made more effective. At this time, it is more preferable to fold the absorbent sheet with the cooling agent coated surface outward.

As the absorbent sheet, plural types of sheets having different widths may be used.
For example, as shown in FIG. 2 described above, the central absorbent sheet 32 may be included in the folded structure of the main absorbent sheet 31 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 slit portion 8 (see FIGS. 1 and 3 etc.) more excellent. It is preferable to apply a cooling agent to a wide absorbent sheet to be the main absorbent sheet 31.

  The front and back layers cut into a predetermined size are laminated and bonded on both sides of the absorbent layer obtained as described above to produce an absorbent article. At that time, the above-mentioned leakproof groove is manufactured. The production method can also be formed, for example, by pressing (for example, embossing), as described above. Further, if necessary, the liquid diffusion layer and the side sheet may be formed into predetermined sizes and shapes and laminated. Furthermore, you may perform various pressing processes (for example, joining process) other than a leak-proof groove.

When the absorbent layer 3 has a laminated structure of the main absorbent sheet 31 and the central absorbent sheet 32 shown in FIG. 1, it can be manufactured by the following process.
That is, as shown to FIG. 5 (A), a cooling agent solution is apply | coated to the main body absorptive sheet 31, and the application part 22 of a cooling agent solution is formed. Thereafter, the main absorbent sheet 31 is folded inward at a portion indicated by a dotted line, and the central absorbent sheet 32 folded in advance is wrapped. Thereby, the laminated structure in the absorption layer 3 is formed. At this time, since the cooling agent solution is present in the portion 22 where the cooling agent solution is applied, the cooling agent diffuses with the passage of time. For example, in the absorbent layer 3 of the manufactured napkin 10, as shown in FIG. 5B, the cooling agent diffuses in the width direction and the vertical direction, and the region 21 containing the cooling agent spreads. Then, as time passes, as shown in FIG. 5C, the region 21 in which the cooling agent is contained by being diffused in the width direction further spreads. However, since the slit portion 8 and the leakage preventing groove 7 are disposed, the diffusion in the width direction of the cooling agent is controlled, and the diffusion in the longitudinal direction is induced. Thereby, the region 21 containing the cooling agent can be suppressed from spreading from the inner region to the outer region of the leakproof groove 7. Even if the leakage prevention groove 7 is exceeded, the amount of the cooling agent diffused to the outside of the leakage prevention groove 7 can be suppressed to be smaller than that in the inner region.

Moreover, although not shown, the application part 22 of a cooling agent solution can also be formed in the middle part C in the longitudinal direction of the absorption layer 3 and in the liquid receiving area C1. In this case, in the absorbent layer 3 of the manufactured napkin 10, as shown in FIG. 6A, the diffusion of the cooling agent is suppressed in the longitudinal direction in addition to the width direction by the slit portion 8, and the cooling agent Suppresses the spread of the region 21 containing. And even if the diffusion of the cooling agent proceeds, as shown in FIG. 6 (B), the leakage preventive groove is used to prevent the region 21 containing the cooling agent from leaking together with the diffusion suppressing effect by the slit portion 8. It is possible to suppress the diffusion to the outer area of 7. Even if the leakage preventing groove 7 is exceeded, the amount of cooling agent diffused to the outer region of the leakage preventing groove 7 is suppressed to reduce the amount of cooling agent than the inner region (the cooling agent per unit area) Amount) can be reduced.
As described above, since the cooling agent can be prevented from spreading outward from the middle portion C of the absorption layer 3 by the diffusion suppressing effect of the cooling agent by the slit portion 8, a cool feeling can be sufficiently given to the wearer. .

  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, without stimulating the temperature receptor on the surface of either or both of the skin and mucous membrane of the wearer, without changing the temperature on the surface or either or both of the skin and mucous membrane, Various agents capable of imparting a refreshing sensation to the wearer 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 viewpoints of refreshing feeling due to odor, rapid aggression, and sustainability. 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 preferable 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 in particular, "water-insoluble" is 0.1 g in 1 L of water at 25 ° C. It says that it is the following solubility.
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. Furthermore, a cross-linked cellulose fiber obtained by crosslinking either or both of the inside and the inside of the cellulose fiber may be used, or a bulky cellulose fiber obtained by mercerizing a wood pulp. Examples of the pulp include wood pulp such as softwood kraft pulp or hardwood kraft pulp, and natural cellulose fibers such as cotton pulp and straw pulp, but are not limited thereto. These pulps can be used alone or in combination of two or more.

The superabsorbent polymer material constituting the absorbent layer 3 can be obtained, for example, by polymerizing a water-soluble ethylenic unsaturated monomer mainly composed of acrylic acid or acrylic acid salt and optionally containing a crosslinking agent. Hydrogel materials are included. 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. Those which can absorb and hold 20 times or more of their own weight and can gelate are preferable.
As the shape of the superabsorbent polymer material, various materials used for the absorbent layer 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 materials 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. It is preferable that it is a thermoplastic resin fiber subjected to hydrophilization treatment, and the fiber is a fiber subjected to a three-dimensional crimp such as a secondary crimp or a tertiary crimp. Specifically, polyethylene, polypropylene, polyester, nylon, and composite fibers thereof are prepared, and various hydrophilicizing agents are applied before cutting into a predetermined length to form staples. 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 and the like.

  The liquid diffusion 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 packaging outer material for individual packaging. 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.

DESCRIPTION OF SYMBOLS 1 surface layer 2 back layer 3 absorption layer 3E width direction both-ends edge 5 side sheet 6 wing part 7 leak-proof groove 8 slit part 9 non-slit area 10 sanitary napkin 21 area containing a cooling agent 22 cooling agent solution Coating section 31 Main absorbent sheet 32 Central absorbent sheet C Middle section

Claims (12)

A longitudinal direction corresponding to a direction connecting a belly side, a crotch and a back side of a wearer, comprising a front surface layer, a back surface layer, and an absorbent layer disposed between the front surface layer and the back surface layer; An absorbent article having a width direction orthogonal to the longitudinal direction,
A leak-proof groove, which is squeezed from the surface layer to the absorption layer, is disposed in the vertical direction across the liquid receiving area in plan view.
The absorption layer is provided with a slit portion in an inner region sandwiched by the leak-proof groove in plan view,
A cooling agent is contained in a region on the non-skin surface side of the surface layer in the absorbent article,
The absorbent article which the area | region in which the said cooling agent was contained has overlapped with the said slit part or both the said slit part and the said leak-proof groove in planar view. The slit portion and the leak-proof groove are partially in contact with each other,
The absorbent article according to claim 1, wherein the inner region contains a large amount of the cooling agent, as compared to an outer region located outside in the width direction than the leakage preventing groove.   The absorbent article according to claim 1 or 2, wherein the cooling agent is included in an area excluding both sides in the width direction on the skin surface side of the absorbent layer.   The absorbent article according to any one of claims 1 to 3, wherein a region having a basis weight of the cooling agent smaller than that of the surroundings is provided in the middle portion in the longitudinal direction on the skin surface side of the absorbent layer.   The absorbent article according to any one of claims 1 to 4, wherein at least front and rear ends of the slit portion are in contact with the leak-proof groove.   The basis weight of the said cooling agent in the said slit part is made larger than the basis weight of the said cooling agent in the non-slit area | region of the said absorption layer in the inner area | region of the said leak-proof groove | channel The absorbent article according to any one of the items.   The said absorption layer has a laminated structure of an absorbent sheet, The said slit part is penetrating at least 1 layer in the laminated structure of the said absorbent sheet, The any one of Claims 1-6 Absorbent article.   A central absorbent sheet, wherein the absorbent layer is located in the middle of the absorbent article, and a body absorbent in which the absorbent layer extends outward from at least a part of the periphery of the central absorbent sheet and is laminated to the central absorbent sheet The absorbent article according to any one of claims 1 to 7, further comprising an elastic sheet, wherein the leakage preventing groove is disposed in the main absorbent sheet.   A step of applying a cooling agent over a predetermined width of the raw material member to be an absorption layer, and a slit portion extending in the longitudinal direction in a region wider than the cooling agent application width on the surface of the raw material member to be an absorption layer Providing an absorbent article.   The manufacturing method of the absorbent article of Claim 9 which performs the process of apply | coating the said cooling agent after the process of providing the said slit part.   The absorbent sheet is used as the raw material member to be the absorbent layer, and the step of providing the slit part is a step of providing a plurality of cuts in a predetermined area of the absorbent sheet in a distributed manner in the surface direction. Or the manufacturing method of the absorbent article of 10 description.   After the step of applying the cooling agent and the step of providing the slit portion, the step of forming the laminated absorbent sheet by folding the absorbent sheet outside the widthwise end of the position where the cooling agent is applied The manufacturing method of the absorbent article of Claim 11 provided with.

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