WO2019093267A1

WO2019093267A1 - Absorbent article

Info

Publication number: WO2019093267A1
Application number: PCT/JP2018/040997
Authority: WO
Inventors: 奥田　富美子; 木村　真由美; 西川　綾
Original assignee: 花王株式会社
Priority date: 2017-11-08
Filing date: 2018-11-05
Publication date: 2019-05-16
Also published as: TWI781245B; JP2019084139A; TW201929804A

Abstract

An absorbent article is provided with an obverse surface layer 1, a reverse surface layer 2, and an absorbent layer 3, has a longitudinal direction corresponding to a direction connecting a wearer's ventral part, groin part, and dorsal part and a width direction intersecting the longitudinal direction, and has, along the longitudinal direction, a front part F, a rear part R, and a central part C that is between the front part and the rear part and includes a region corresponding to an elimination orifice. The absorbent layer 3 comprises a layered stack of a central absorbent sheet 32 that contains a cooling sensation agent and encapsulating absorbent sheets 31 disposed on the skin side and the non-skin side of the central absorbent sheet 32. The absorbent layer 3 has, in an overlap region (as seen in plan view) between the central absorbent sheet 32 and the encapsulating absorbent sheets 31, a communicating part 8 on at least the skin side.

Description

Absorbent articles

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 stickiness when there is a large amount of excrement fluid or when used for a long time. On the other hand, conventionally, there has been a technique for improving the feeling of wearing by incorporating a cooling sensation material such as a refreshing agent into the absorbent article (for example, Patent Documents 1 and 2). The cold sensation material is volatilized and stimulates TRPM8 or TRPA1 of the sensory nerve cells of the wearer's skin to change the receptor threshold, thereby giving a refreshing sensation.

Japanese Patent Publication No. 2004-528090 JP, 2010-234028, A

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 a longitudinal direction corresponding to a direction connecting the belly side, crotch and back side of the wearer. Has a direction and a width direction orthogonal to the longitudinal direction, and includes a region corresponding to a discharge point, which is located along the longitudinal direction between the front portion, the rear portion, and the front portion and the rear portion An absorbent article having a middle part, wherein the absorbent layer is a central absorbent sheet containing a cooling agent, and an outer packet absorbent sheet disposed on the skin side and the non-skin side of the central absorbent sheet. In a layered manner, and the absorbent layer provides an absorbent article having a communicating part at least on the skin surface side in a region where the central absorbent sheet and the outer wrapping absorbent sheet overlap in plan view.
The present invention further comprises the steps of applying a cooling agent to a central absorbent sheet, sandwiching the skin side and non-skin side of the central absorbent sheet with an outer cover absorbent sheet, the central absorbent sheet and the outer cover Forming a communicating portion at least on the skin surface side in a region overlapping in plan view with the absorbent sheet.

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 the polymer rich area | region and the fiber rich area | region in a center absorptive sheet in partial enlargement. (A) to (D) are cross-sectional views showing other preferred examples of the folded structure of the central absorbent sheet. (A) to (D) are schematic views showing a specific example of the arrangement of the anti-slip portion with respect to the central absorbent sheet from the non-skin surface side.

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 generally reduced with time by volatilization, and the cooling effect is reduced. Therefore, conventionally, it has not been sufficient to maintain a proper cooling sensation effect. From the viewpoint of a moderate cooling effect, it is desirable that the effect be maintained for a long time without excessively increasing the cooling agent.

On the other hand, the absorbent article of the present invention can effectively maintain a suitable cooling effect on the wearer's skin 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 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 absorption layer (absorber) 3. The surface layer 1 has liquid permeability that can send the liquid to the absorbent layer 3, and the back surface layer 2 has 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 absorption layer 3 while covering both surfaces of the absorption 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. On the non-skin-contacting surface side of the wing portion 6 and the back surface layer 2, a displacement preventing adhesive portion 7 for fixing the napkin 10 to clothes is disposed. 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 liquid diffusion 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 portion F disposed on the abdomen side forward of the middle portion C and a rear portion 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. The "width direction central portion" where the liquid receiving area C1 is, as shown in FIG. 1, means a range of a predetermined width extending laterally from the center line L in the width direction, and is wider than the width direction both end edges 39 of the absorbing layer 3 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 50% with respect to 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 The midsection follows this setting, even in the case of a day napkin without the wings and wings. 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 preferable layer structure of the absorption layer 3, the area | region containing the cooling agent in the absorption layer 3, and the communication part 8 are demonstrated.

The absorbent layer 3 has a laminated structure in which a central absorbent sheet 32 containing a cooling agent and an outer shell absorbent sheet 31 disposed on the skin side and the non-skin side of the central absorbent sheet 32 are layered. Have. In a region where the central absorbent sheet 32 and the outer shell absorbent sheet 31 overlap in plan view, at least the skin surface side is provided with a communicating portion 8 which is a ventilating means communicating the central absorbent sheet 32 and the outer shell absorbent sheet 31. .
Due to the structure in which the envelope absorbent sheet 31 is disposed on the upper and lower sides (skin side and non-skin side) of the central absorbent sheet 32 containing a cooling agent, excessive volatilization of the cooling agent during use is suppressed, The sense of sustainability increases. In addition, the volatilization of the cooling agent is not completely suppressed by the structure in which the communicating portion 8 of the central absorbent sheet 32 and the outer packaging absorbent sheet 31 is provided at least on the skin surface side, and the cooling agent An appropriate cooling sensation can be imparted via That is, when the napkin 10 is worn, the volatile component of the cooling agent accumulated between the layered sheets in the absorbent layer 3 can be positively moved to the skin surface side by the communication part 8.

In the present embodiment, preferable aspects of the central absorbent sheet 32 and the outer wrapping absorbent sheet 31 having the layer structure of the absorbent layer 3 will be described in detail.
In FIG. 2, 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. The central absorbent sheet 32 is disposed in the middle portion C. The central absorbent sheet 32 is located at a middle portion C located between the front portion F and the rear portion R, including the liquid receiving area C1. The arrangement of the central absorbent sheet 32 may have the same length as the middle portion C if it is arranged in the middle portion C, and the length from the middle portion C to the front portion F and the rear portion R May be included.
In FIG. 2, the outer packaging absorbent sheet 31 has a folded structure in which both ends in the width direction are overlapped on the back layer 2 side and folded in three. The outer packaging 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 outer packaging absorbent sheet 31 is wider in the folded state than the central absorbent sheet 32 in the folded state, and has a longer length in the longitudinal direction than the central absorbent sheet 32.
In the absorbent layer 3, the central absorbent sheet 32 containing a cooling agent is housed inside the folded structure of the outer shell absorbent sheet 31. In this arrangement, the skin surface side portion 31A and the non-skin surface side portion 31B of the outer packaging absorbent sheet 31 are arranged so as to cover the skin surface side and the non-skin surface side of the central absorbent sheet 32.
The absorbent layer 3 has the central absorbent sheet 32 in the above-described laminated structure, and is provided with a high basis weight portion 33 thicker than the periphery at the center in the width direction of the middle portion C.
The ratio (H2 / H1) of the thickness (H1) of the high basis weight portion 33 to the thickness (H2) of the portion other than the high basis weight portion 33 in the absorbent layer 3 can be used without discomfort to the skin surface From the viewpoint, 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.

The central absorbent sheet 32 contains a cooling agent as described above. The central absorbent sheet 32 may contain a cooling agent in the entire area of the central absorbent sheet 32 or may be contained in a partial area of the central absorbent sheet 32.
When the central absorbent sheet 32 has a folded structure, it is preferable to contain a cooling agent in the region inside the folded structure. Further, when the central absorbent sheet 32 has a polymer rich region 35 and a fiber rich region 36 described later, it is more preferable to contain a cooling agent in the polymer rich region 35.
The cooling agent may be contained in other regions of the absorbent layer 3 as long as it is contained in the central absorbent sheet 32, and members other than the central absorbent sheet 32 (for example, the outer packaging absorbent sheet 31 or the liquid diffusion layer 4 and the surface layer 1). However, it is preferable that the central absorbent sheet 32 has a region having the largest content of the cooling agent, from the viewpoint of effectively maintaining the appropriate cooling sensation effect on the wearer's skin for a long time. 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.
When the central absorbent sheet 32 contains a cooling agent, it is preferable to include an application part of the cooling agent, that is, an application part of the cooling agent-containing liquid. Here, a cooling agent containing liquid is a coating liquid which mixed the cooling agent and the solvent, and is a liquid used when making the napkin 10 contain a cooling agent. The application part of the cooling agent containing liquid is a part to be initially contained in the manufacturing process, and in the napkin 10 as a product, it is a part having a large amount of cooling agent component (a part having a large content). This content can be measured by a method which is divided into the central absorbent sheet 32 and the outer wrapping absorbent sheet 31 of the absorbent layer 3 and described later.

The central absorbent sheet 32 may further contain an antibacterial agent. By containing the antibacterial agent, in addition to the suppression of mure and stickiness as a sensation due to a cooling agent, it is possible to suppress the proliferation of bacteria easily caused due to mure and stickiness, and can be used comfortably.

The communicating portion 8 is a ventilation means communicating at an overlapping portion of the central absorbent sheet 32 and the outer wrapping absorbent sheet 31. The communicating portion 8 is disposed at least on the skin surface side of the absorbent layer 3 as a ventilation means for guiding the volatile component of the cooling agent to the skin surface. In the present embodiment, the skin surface side portion 31A of the outer packaging absorbent sheet 31 and the central absorbent sheet 32 are arranged. However, the depth of the communication part 8 is not limited to this. Preferred embodiments will be described later.
The communicating portion 8 functions as a moving path of the volatile component of the cooling agent, and a moving path of air due to the deformation of the absorbing layer 3 and the like. Due to these actions, the volatile component of the cooling agent accumulated between the sheets of the absorption layer, which is a layered structure, is transferred to the skin surface even when the residual amount of the cooling agent decreases, particularly with time. It can be delivered enough. For example, when the cooling agent remains behind the absorption layer 3, the volatile component of the cooling agent can be positively fed from the inside of the absorption layer 3 to the skin surface by the presence of the communication portion 8. The delivery of the cooling agent is more effective, for example, due to the deformation of the absorbent layer accompanying the movement of the wearer's body when wearing a napkin.

The communicating portion 8 may be a gap portion such as a slit portion cut into an elongated shape or a recessed portion space where a portion of the member is cut away, or a recessed portion space (squeezed portion) in which a portion of the member is pressed and depressed It may be a recess space in which the basis weight of the member is partially reduced.
When the communication part 8 is a concave part space where a slit part or a part of a member is cut away, in the communication part 8, the central absorbent sheet 32 and the outer packaging absorbent sheet 31 are continuously cut at the same position. The cutting end forms the wall of the communicating portion 8. In this wall, it is preferable that a part of the cut ends of the central absorbent sheet 32 and the outer wrapping absorbent sheet 31 be joined. With such a configuration, the distance from the portion containing the cooling agent to the surface on the skin surface side of the absorbent layer 3 becomes short, and the movement of the cooling agent to the skin surface side is performed more effectively. be able to. It is considered that the same effect can be obtained in the pressing section.

The communication portion 8 is preferably a communication hole. A communicating hole is a hole which penetrates predetermined thickness from the skin surface side of absorption layer 3, and is the concept containing the slit part and crevice space which were mentioned above. When the communication portion 8 is a communication hole, when an external force such as a pressure inward in the width direction of the napkin 10 or a shearing force in the front-rear direction is applied with the movement of the wearer's body when wearing the napkin 10 The communication hole portion can be opened and closed, and the volatile component of the cooling agent can be more effectively fed to the skin surface side while being accumulated in a fixed amount.

In the present embodiment, the communication portion 8 is disposed as a slit portion 81 obtained by cutting a part of the absorbent layer 3 (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 the time of measurement, measurement magnification is appropriately adjusted and measured.

The communication portion 8 is at least disposed in a region where the central absorbent sheet 32 and the skin surface side portion 31A of the outer packaging absorbent sheet 31 overlap in plan view on the skin surface side of the absorbent layer 3 (FIG. 1 and FIG. 3). reference). The communicating portion 8 is preferably disposed in a region including at least the middle portion C in the longitudinal direction of the absorption layer 3 in plan view. Further, among the communicating portions 8, those located on the outermost side in the width direction are on the inner side than both end edges 39 in the width direction of the absorbing layer 3 and are arranged on the outer side in the width direction than the region containing the cooling agent. preferable.
It is preferable that a plurality of communication portions 8 be dispersedly arranged in the above-described region in order to effectively exhibit the function as the air passage.

The communicating portion 8 may be formed at least on the surface layer 1 side (skin surface side) of the absorbing layer 3 in the thickness direction of the absorbing layer 3, and may extend to a predetermined depth from the surface layer 1 side. It may extend over the entire thickness direction of the layer 3. In consideration of the action of the communication part 8 on the cooling agent, it is preferable that the communication part 8 be as far as the predetermined depth from the surface layer 1 side. The depth is preferably about 50% to 70% of the thickness of the absorbing layer 3. More specifically, it is preferable that the communication portion 8 be disposed across the plurality of sheet layers in the thickness direction from the skin surface side of the absorbent layer 3, and the center from the skin surface side portion 31 A of the outer packaging absorbent sheet 31 It is more preferable to reach the portion of the absorbent sheet 32 where the cooling agent is disposed. In addition, it is preferable that the outer wrapping absorbent sheet 31 (the non-skin surface side portion 31B) of the portion closest to the anti-displacement portion 7 does not exist. With such a configuration, it is possible to promote the diffusion of the cooling agent to the skin side to give an appropriate cooling sensation, and also suppress the diffusion of the cooling agent to the non-skin side to shift It is possible to more effectively suppress the decrease in the adhesive strength of the anti-adhesive portion, and the decrease in the anti-displacement performance such as the adhesive residue on the clothes.
On the other hand, it is preferable that the communicating portion 8 extends from the surface to the back surface of the absorbing layer 3 from the viewpoint of the cooling effect due to the movement of the air to the communicating portion 8 due to the deformation of the absorbing layer 3.

The plan view shape of the communication portion 8 is not particularly limited, and may be rectangular or circular. It is preferable that the length in one direction of the communicating portion 8 be wider on the skin surface side than the non-skin surface, considering the action on the cooling agent. With such a configuration, the diffusion of the cooling agent to the skin side can be further promoted, and the diffusion of the cooling agent to the non-skin side can be further suppressed.

The absorbent sheet which comprises the center absorbent sheet 32 and the outer shell absorbent sheet 31 contains a highly absorbent polymer material and hydrophilic fibers. The water absorbing sheet is a thin sheet having a thickness in which a superabsorbent polymer material is sandwiched and fixed between two sheet-like fiber layers made of hydrophilic fibers. The superabsorbent polymer material mentioned here is a surface-crosslinked polymer material called a so-called SAP (Superabsorbent polymer) (the same applies hereinafter). In forming the absorbent sheet, it can be integrated using the adhesive strength of the superabsorbent polymer when it is wetted, or a binder such as an adhesive or adhesive fiber added separately. The preparation can be performed by various methods commonly used, and may be either wet or dry.
Since the absorbent sheet has a highly absorbent polymer material dispersed and arranged in the plane direction of the sheet, gel blocking (the absorption inhibition phenomenon of the liquid caused by the interaction between the absorbent polymers which are absorbed by swelling the aqueous liquid such as body fluid) Are difficult to cause, and have high absorbency. For this reason, the thickness of one water absorbing sheet layer can be suppressed to 1.0 mm or less. For example, those described in paragraphs [0019] to [0131] of JP-A-8-246395 can be mentioned.

The absorbent sheet preferably has a polymer rich region 35 and a fiber rich region 36 as shown in FIG. 4 in a cross sectional view. Specifically, FIG. 4 shows an embodiment in which the polymer rich area 35 and the fiber rich area 36 are laminated on the thickness cross section of a part of the absorbent sheet constituting the central absorbent sheet 32 to form an integral structure. There is.
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 to the polymer-rich region 35 is relatively low.

With the above configuration, the absorbent sheet has a polymer-rich region 35 in which free water becomes relatively small after absorption of menstrual blood in the thickness direction of the absorbent layer 3 and a fiber-rich region 36 in which free water remains relatively between fibers. Prepare.

The cooling agent is preferably contained in the polymer rich region 35 of the central absorbent sheet 32. At this time, it is preferable that the cooling agent application part mentioned above is distribute | arranged to the polymer rich area | region 35. As shown in FIG. In the polymer-rich region 35, the superabsorbent polymer material 37 relatively reduces the free water in the periphery, so the cooling agent tends to evaporate. On the other hand, in the fiber-rich region 36, excessive diffusion of the volatile component of the cooling agent can be suppressed by the free water (body fluid) remaining relatively in a relatively large amount.
The central absorbent sheet 32 preferably has a cooling agent in the polymer rich area 35 and is folded with the fiber rich area 36 on the outer surface side. Thus, the cooling agent is easily volatilized inside the laminated structure of the central absorbent sheet 32. In addition, it has a structure which suppresses that the volatile component of a cooling agent spreads outside to the outer side of the central absorbent sheet 32 too much. As a result, the central absorbent sheet 32 can effectively impart an appropriate cooling sensation effect longer in combination with the outer wrapping absorbent sheet 31.
Moreover, by setting it as such a structure, the spreading | diffusion of the cooling agent to the slippage prevention adhesion part 7 can be suppressed moderately, and degradation of the slippage prevention performance can be suppressed.

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. Then, on the surface to which the superabsorbent polymer material has been dispersed, a fiber assembly containing hydrophilic fibers and a heat melting adhesive fiber or a paper strength reinforcing agent is laminated, dried and integrated to obtain an absorbent sheet. obtain. 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 penetration of the superabsorbent polymer material into fibers, bulky paper such as creped paper, 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.

Since the cooling agent lasts as described above, there is no need to increase the content excessively. Therefore, while having the same content as in the prior art, it is possible to suppress the stimulation on the skin and maintain the appropriate cooling sensation effect effectively for a long time.
Specifically, the content of the cooling agent in the entire napkin 10 can be determined depending on the type of the cooling agent from the viewpoint of the appropriateness of the cooling feeling, the mure feeling and the sticky feeling.
For example, in the case of menthyl lactate, 4 mg / 100 mm or more is preferable, 5 mg / 100 mm or more is more preferable, and 6.5 mg / 100 mm or more is more preferable. 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.

(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. Further, 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 target member or the target site. In addition, the obtained menthyl lactate content and / or menthol content is divided by the length (mm) of the absorbent article in the length direction of the target member or target portion of the absorbent article, and multiplied by 100 to obtain the product length ( Absorbent layer length) The amount of cooling agent per 100 m can be determined.
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.

In the laminated structure of the absorbent layer 3 of the present embodiment, the central absorbent sheet 32 is not limited to the one having a folded structure as shown in FIG. 2 as long as it has a laminated structure with the outer wrapping absorbent sheet 31. For example, an unfolded embodiment is also possible. However, from the viewpoint of controlling the volatilization of the cooling agent, the central absorbent sheet 32 preferably has a folding structure. 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. 5 (A) to 5 (D). FIG. 5 (A) 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 side and the non-skin side, respectively. FIG. 5B shows an aspect in which the sheet is folded in half in the width direction. FIGS. 5C and 5D show a mode in which the portions folded in three in the width direction are equal in length.

In the laminated structure of the absorbent layer 3 of the present embodiment, the outer packaging absorbent sheet 31 is not limited to one having a folded structure as shown in FIG. For example, the outer wrapping absorbent sheet 31 may be formed as a plurality of separate sheet parts, and these sheet parts may be arranged on the skin surface side and the non-skin surface side of the central absorbent sheet 32 to form a laminated structure. From the viewpoint of controlling the volatilization of the cooling agent, the envelope absorbent sheet 31 is preferably folded.
The folded structure of the outer wrapping absorbent sheet 31 is not limited to the aspect shown in FIG. 2 and can be various. For example, it may be similar to those shown in FIGS. 5 (A) to 5 (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 the central absorbent sheet 32 inside the folding structure of the outer packaging absorbent sheet 31, and the central absorbent sheet on the non-skin side of the folding structure of the outer packaging absorbent sheet 31 without including it. 32 may be laminated.
However, if the central absorbent sheet 32 is contained in the inside of the folded structure of the outer packaging 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 communication portion 8 described above.

Regardless of the laminated structure of the absorbent layer 3, it is preferable that the overlapping portions of the absorbent sheets are not joined except for the portion where the communication portion 8 is disposed. 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, the movement of the volatile component of the cooling agent to the skin can be more easily expressed.

Next, a preferred positional relationship between the anti-deviation adhesive portion 7 and the central absorbent sheet 32 in consideration of the influence of the cooling agent on the anti-deviation adhesive portion 7 will be described.
The slip prevention adhesion part 7 is arrange | positioned at the non-skin surface side of the back surface layer 2 as mentioned above. The anti-displacement portion 7 adheres to the clothes and has a function of reducing the displacement between the clothes and the napkin. Heretofore, a cooling agent has been one of the factors that lower the anti-displacement performance, such as the decrease in the adhesive strength of the anti-displacement portion and the adhesive residue on the clothes.
On the other hand, in the present embodiment, it is preferable to reduce the overlap between the anti-slip portion 7 and the central absorbent sheet 32 containing a cooling agent in a plan view as much as possible. From this point of view, the overlapping portion is an arrangement area of the central absorbent sheet 32 (an area occupied by the central absorbent sheet 32 in a plan view of the napkin 10 and when the central absorbent sheet 32 is in a folded state, It is preferable that it is 35% or less of arrangement | positioning area when the area in planar view in the folded state is 100%, It is more preferable that it is 30% or less, It is more preferable that it is 25% or less . With such an arrangement, the influence of the cooling agent on the pressure-sensitive adhesive of the anti-displacement portion 7 is reduced to suppress the decrease in the adhesive strength and the anti-displacement performance such as the adhesive residue on the clothes. it can. The overlapping portion is preferably 10% or more, more preferably 15% or more, and still more preferably 18% or more, from the viewpoint of effectively suppressing the difference from the clothes. Further, from the viewpoint of effectively suppressing the displacement with the clothes, it is preferable that a plurality of the displacement prevention adhesive portions 7 be dispersedly disposed.

In addition, it is preferable that the central area in the width direction of the middle portion C of the central absorbent sheet 32 has a small overlap with the anti-slip portion 7, and more preferably not. By reducing the amount of the anti-slip portion 7 in the region of the central region in the width direction of the central absorbent sheet 32 to which the body pressure is most applied, the influence of the cooling agent on the anti-slip portion 7 can be reduced. Here, the width direction central region of the middle portion C of the central absorbent sheet 32 means the central region of the central absorbent sheet 32 when the entire length in the width direction is divided into three.

6 (A) to 6 (D) are schematic views showing a specific example of the arrangement of the anti-slip portion 7. As shown in FIG. In FIGS. 6A to 6D, in order to show the positional relationship between the anti-slip portion 7 and the central absorbent sheet 32, the disposition of the anti-slip portion 7 on the central absorbent sheet 32 except for the other members. Is shown schematically.
FIG. 6A shows a mode in which a plurality of anti-slip adhesion portions 7 are arranged at positions on both sides of the central absorbent sheet 32 in the longitudinal direction. FIG. 6 (B) shows a mode in which a pair of the shift preventing adhesive portions 7 continuous in the longitudinal direction are arranged along both sides in the longitudinal direction of the central absorbent sheet 32. In both FIGS. 6A and 6B, the anti-slip adhesion portion 7 is disposed so as not to overlap the central region in the width direction of the central absorbent sheet 32. FIG. 6C shows a mode in which a plurality of anti-slip adhesion portions 7 are arranged in parallel in the width direction of the central absorbent sheet 32. FIG. 6D shows a mode in which a plurality of anti-slip adhesion portions 7 are arranged in parallel in the longitudinal direction of the central absorbent sheet 32.

The overlap between the anti-slip adhesive portion 7 and the central absorbent sheet 32 is 35% or less of the above-mentioned arrangement area so that the anti-slip adhesive portion 7 does not overlap with the central region in the width direction of the middle portion C of the central absorbent sheet 32 By arranging it, the overlapping portion of the central absorbent sheet 32 and the anti-slip portion 7 in plan view is sufficiently reduced, and the anti-slip portion 7 is present in the region of the central region in the width direction where body pressure is most applied. By not carrying out, the influence which a cooling agent has on a gap stop adhesion part can be reduced more effectively.

When the absorbent article includes the side sheet 5, the side sheet 5 is preferably laminated on both sides of the skin contact surface side of the surface layer 1. It is more preferable that the side sheet 5 has lower air permeability than the surface layer 1.

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. Examples of cyclohexyl derivatives include menthyl lactate, menthylethylaminooxalic acid, 3- (l-menthoxy) propane-1,2-diol, 3- (l-menthoxy) -2-methylpropane-1,2-diol, and succinic acid. Menthyl, 3- (l-menthoxy) ethan-1-ol, 3- (l-menthoxy) propan-1-ol, 3- (l-menthoxy) butan-1-ol, 1-menthyl-4-hydroxypentano And alt, l-menthyl 3-hydroxybutyrate and the like. Examples of cyclohexanol derivatives include menthol, p-menthan-3,8-diol, isopulegol and the like. As carboxamides, N-ethyl-p-menthane-3-carboxamide (N-ethyl-2-isopropyl-5-methylcyclohexane-1-carboxamide), N, 2,3-trimethyl-2- (l-methylethyl) And L) -butanamide, 1-menthylacetic acid N-ethylamide and the like. One of these may be used, or two or more of them may be used in combination.
Among them, a water-insoluble or poorly water-soluble cooling agent is preferable from the viewpoint of refreshing feeling due to odor, quick action, 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. As water-insoluble substances, menthyl lactate and menthol are preferable. 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 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 the antibacterial agent, those usually used in the field of absorbent articles can be used.

As a hydrophilic fiber which comprises an absorptive sheet, 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 constituting the absorbent sheet can be obtained, for example, by polymerizing a water-soluble ethylenically unsaturated monomer which is mainly composed of acrylic acid or acrylate and optionally added with 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 water-absorbing 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 20 times or more of its own weight and capable of gelation is 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.

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 fiber web obtained by card method or air laid method, heat fusion point of fibers is formed by heat roll method on 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.

Next, the preferable manufacturing method of the absorbent layer used for the absorbent article of this invention, and the preferable manufacturing method of the absorbent article of this invention are demonstrated.
A preferred method for producing the absorbent layer 3 includes the following steps among commonly used methods for producing an absorbent article.
That is, the step (S1) of applying a cooling agent to the central absorbent sheet 32, the step (S2) of sandwiching the skin side and the non-skin side of the central absorbent sheet 32 with the outer cover absorbent sheet 31, and central absorbent And a step (S3) of forming the communicating portion 8 at least on the skin surface side in a region where the sheet 32 and the outer wrapping absorbent sheet 31 overlap in plan view.

In the method of manufacturing the absorbent layer 3, the central absorbent sheet 32 and the outer wrapping absorbent sheet 31 may be laminated in the step (S2) without being folded, even if one or both of the both sheets are folded and laminated. Good. When the central absorbent sheet 32 and the outer wrapping absorbent sheet 31 are folded, a sheet wider than the width of the absorbent layer is used on the assumption that the central absorbent sheet 32 and the outer wrapping absorbent sheet 31 are folded. The application of the cooling agent in the step (S1) is appropriately performed by assuming that the central absorbent sheet 32 is folded.

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 (absorbent body) described above. For example, a region having a range of 75% or less with respect to the width of the absorbing layer 3 is more preferable, and a region having a range of 70% or less is further preferable. As described above, the cooling agent is preferably prepared and applied as a cooling agent-containing coating solution in which a solvent is mixed. As the solvent, those usually used can be used. For example, dipropylene glycol and the like can be mentioned.
In the step (S2), it is preferable to perform the step of sandwiching the central absorbent sheet 32 with the outer wrapping absorbent sheet 31 after folding. When the central absorbent sheet 32 has the polymer rich area 35 and the fiber rich area 36, the central absorbent sheet 32 is folded with the fiber rich area 36 outside and then sandwiched by the outer absorbent sheet 31. Is more preferred.

The communicating portions 8 in the step (S3) are provided in a distributed manner in the surface direction. As shown in FIG. 3, it is preferable that a plurality of communicating portions 8 provided in the absorbent sheet have a length extending in the longitudinal direction of the absorbent layer, and a plurality of the communicating portions 8 be arranged in the longitudinal direction. It is more preferable to arrange multiple arrays in the width direction of the absorbing layer. The formation of the communicating portion 8 can be performed by various methods used for this kind of article depending on the form of the communicating portion 8.
For example, when the communication portion 8 is a slit portion, a cutting blade extending in the circumferential direction on the roll circumferential surface is provided with a cutter roll distributed and arranged in the roll circumferential direction and the roll axis direction, and an anvil roll correspondingly disposed. The cutting device can be used to form cuts (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. Moreover, when the communication part 8 is the recessed space which a part of member cut away, it can change the setting of the cutting blade of said roll, etc., and can form. Moreover, when the communication part 8 is the recessed space (pressing part) which a part of member was pressed down and was dented, it can form by various embossing processes.

In the step (S3), the width of the region forming the communication portion 8 is preferably a region which is wider than the cooling agent application width and which is inside the width direction both end edges 39 of the absorbent 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.

As a manufacturing method of the absorption layer 3, it is preferable to perform the said process (C3) after process (C1) and (C2).

It is preferable that the manufacturing method of the absorbent article of this invention has the following processes performed using the absorption layer 3 obtained by said manufacturing method.
(S4) Step of disposing the absorbing layer 3 between the surface layer 1 and the back layer 2 (S5) step of disposing the anti-slip portion 7 on the non-skin side of the back layer 2 In the step (S4), 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. At that time, if necessary, the liquid diffusion 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.
Next, step (S5) is performed as necessary. In the step (S5), after providing the back surface layer 2, the anti-displacement portion 7 is disposed. In that case, the overlapping portion of the anti-slip portion 7 and the central absorbent sheet 32 in plan view is 35% or less of the arrangement area of the central absorbent sheet 32, and the widthwise center of the central portion C of the central absorbent sheet 32 It is preferable to arrange the area so as not to overlap with the anti-slip portion.

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

<1>
A longitudinal direction corresponding to a direction connecting a belly side, a crotch and a dorsal side of a wearer, comprising a front layer, a back layer, and an absorbent layer disposed between the front layer and the back layer; It has a width direction orthogonal to the longitudinal direction, and has a front portion, a rear portion, and an intermediate portion located between the front and rear portions and including a region corresponding to a discharge point along the longitudinal direction. An absorbent article, wherein the absorbent layer includes a central absorbent sheet containing a cooling agent, and an envelope absorbent sheet disposed on the skin side and the non-skin side of the central absorbent sheet. An absorbent article, wherein the absorbent layer has a communicating portion at least on the skin surface side in a region where the central absorbent sheet and the outer wrapping absorbent sheet overlap in plan view.
<2>
The central absorbent sheet includes a superabsorbent polymer material and a hydrophilic fiber, and in cross section, the superabsorbent polymer material in the total mass of the mass of the superabsorbent polymer material and the mass of the hydrophilic fiber A polymer-rich region having a relatively high mass ratio, and a fiber-rich region having a relatively low mass ratio relative to the polymer-rich region, wherein the polymer-rich region includes the cooling agent. The absorbent article according to <1>, which is folded with the fiber-rich region on the outer surface side.
<3>
The absorbent article according to <1> or <2>, wherein the central absorbent sheet is disposed in the middle part of the absorbent article, and the communication part is a communication hole connected in a thickness direction.
<4>
The absorbent article according to <3>, wherein a length in one direction of the communication hole is wider on the skin surface side than on a non-skin surface.
<5>
The absorbent article as described in said <3> or <4> whose said communicating hole is a slit part by a cut | notch.
<6>
The anti-slip adhesion portion is disposed on the non-skin surface side of the back surface layer, and the overlapping portion of the anti-slip adhesion portion and the central absorbent sheet in a plan view is 35% of the arrangement area of the central absorbent sheet The absorbent article according to any one of <1> to <5>, in which the widthwise center region of the middle portion of the center absorbent sheet does not overlap the anti-slip portion.
<7>
The absorbent article according to any one of <1> to <6>, wherein the cooling agent is a water-insoluble or poorly water-soluble agent.
<8>
The absorbent article as described in said <7> which contains a menthyl lactate as said cooling agent.
<9>
The absorbent article as described in said <8> which contains menthol as said cooling agent.
<10>
The absorbent article as described in said <9> whose mass ratio of the said menthol and menthyl lactate is 0.01 or more and 0.2 or less as the former / latter.
<11>
The absorbent article according to any one of <1> to <10>, wherein a side sheet having air permeability smaller than that of the surface layer is laminated on both sides of the skin contact surface side of the surface layer.
<12>
The absorbent article according to any one of <1> to <11>, including a wing portion extended outward in the width direction of the absorbent layer.
<13>
The absorbent article according to any one of the above <1> to <12>, which is a sanitary napkin.
<14>
A step (S1) of applying a cooling agent to a central absorbent sheet, a step (S2) of sandwiching the skin side and the non-skin side of the central absorbent sheet with an outer shell absorbent sheet, the central absorbent sheet and the outer shell Forming a communicating portion at least on the skin surface side in a region overlapping in plan view with the absorbent sheet (S3).
<15>
The manufacturing method of the absorption layer as described in said <14> which performs said process (S3) after said process (S1) and (S2).
<16>
The manufacturing method of the absorbent article provided with the process of arranging the absorption layer obtained by the manufacturing method as described in said <15> between a surface layer and a back surface layer.
<17>
And a step of arranging the anti-slip portion on the non-skin side of the back layer, wherein the overlapping portion of the anti-slip portion and the central absorbent sheet in plan view corresponds to the arrangement area of the central absorbent sheet. The absorbent article according to <16>, wherein the width is not more than 35%, and the width direction central region perpendicular to the longitudinal direction in the middle portion of the central absorbent sheet does not overlap with the anti-slip portion. Production method.

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.

The present application claims priority based on Japanese Patent Application No. 2017-215614 filed in Japan on November 8, 2017, which is incorporated herein by reference in its entirety. Capture as part.

DESCRIPTION OF SYMBOLS 1 surface layer 2 back layer 3 absorption layer 4 liquid diffusion layer 5 side sheet 6 wing part 7 shift | offset | difference adhesive part 8 communication part 10 sanitary napkin

Claims

A longitudinal direction corresponding to a direction connecting a belly side, a crotch and a dorsal side of a wearer, comprising a front layer, a back layer, and an absorbent layer disposed between the front layer and the back layer; It has a width direction orthogonal to the longitudinal direction, and has a front portion, a rear portion, and an intermediate portion located between the front and rear portions and including a region corresponding to a discharge point along the longitudinal direction. An absorbent article, wherein the absorbent layer includes a central absorbent sheet containing a cooling agent, and an envelope absorbent sheet disposed on the skin side and the non-skin side of the central absorbent sheet. An absorbent article, wherein the absorbent layer has a communicating portion at least on the skin surface side in a region where the central absorbent sheet and the outer wrapping absorbent sheet overlap in plan view.
The central absorbent sheet includes a superabsorbent polymer material and a hydrophilic fiber, and in cross section, the superabsorbent polymer material in the total mass of the mass of the superabsorbent polymer material and the mass of the hydrophilic fiber A polymer-rich region having a relatively high mass ratio, and a fiber-rich region having a relatively low mass ratio relative to the polymer-rich region, wherein the polymer-rich region includes the cooling agent. The absorbent article according to claim 1, which is folded with the fiber-rich region on the outer surface side.
The absorbent article according to claim 1 or 2, wherein the central absorbent sheet is disposed in the middle portion of the absorbent article, and the communication portion is a communication hole connecting in a thickness direction.
The absorbent article according to claim 3, wherein a length in one direction of the communication hole is wider on a skin surface side than a non-skin surface.
The absorbent article according to claim 3 or 4, wherein the communication hole is a slit portion by cutting.
The anti-slip adhesion portion is disposed on the non-skin surface side of the back surface layer, and the overlapping portion of the anti-slip adhesion portion and the central absorbent sheet in a plan view is 35% of the arrangement area of the central absorbent sheet The absorbent article according to any one of claims 1 to 5, wherein the widthwise central region in the middle portion of the central absorbent sheet does not overlap with the anti-slip portion.
The absorbent article according to any one of claims 1 to 6, wherein the cooling agent is a water insoluble or poorly water soluble agent.
The absorbent article according to claim 7, comprising menthyl lactate as the cooling agent.
The absorbent article according to claim 8, comprising menthol as the cooling agent.
The absorbent article according to claim 9, wherein the mass ratio of menthol to menthyl lactate is 0.01 or more and 0.2 or less as the former / the latter.
The absorbent article according to any one of claims 1 to 10, wherein side sheets having lower air permeability than the surface layer are laminated on both sides of the skin contact surface side of the surface layer.
The absorbent article according to any one of claims 1 to 11, further comprising a wing portion extending outward in the width direction of the absorbent layer.
The absorbent article according to any one of claims 1 to 12, which is a sanitary napkin.
A step (S1) of applying a cooling agent to a central absorbent sheet, a step (S2) of sandwiching the skin side and the non-skin side of the central absorbent sheet with an outer shell absorbent sheet, the central absorbent sheet and the outer shell Forming a communicating portion at least on the skin surface side in a region overlapping in plan view with the absorbent sheet (S3).
The manufacturing method of the absorption layer of Claim 14 which performs the said process (S3) after the said processes (S1) and (S2).
The manufacturing method of the absorbent article provided with the process of arranging the absorption layer obtained by the manufacturing method of Claim 15 between a surface layer and a back surface layer.
And a step of arranging the anti-slip portion on the non-skin side of the back layer, wherein the overlapping portion of the anti-slip portion and the central absorbent sheet in plan view corresponds to the arrangement area of the central absorbent sheet. The manufacturing of the absorbent article according to claim 16, which is 35% or less, and in the middle portion of the central absorbent sheet, the width direction central region orthogonal to the longitudinal direction does not overlap the anti-slip portion. Method.