WO2021132618A1

WO2021132618A1 - Absorbent article

Info

Publication number: WO2021132618A1
Application number: PCT/JP2020/048880
Authority: WO
Inventors: 奈々飯尾; 芳久渡部
Original assignee: ユニ・チャーム株式会社
Priority date: 2019-12-27
Filing date: 2020-12-25
Publication date: 2021-07-01

Abstract

Provided is an absorbent article capable of having an effect on the user by using olive oil, while suppressing adverse effects on the skin. An absorbent article (1) comprises an absorbent core (31) and a top sheet (21) that is disposed further to the skin-surface side than the absorbent core and contacts the skin of the wearer. Olive oil, having an acid value of 6.6 mg/g or less and a peroxide value of 30 meq/mg or less, is disposed on the top sheet, and at least some of the olive oil is provided on the skin-facing side of the top sheet. Another embodiment of an absorbent article (1X) comprises the absorbent core (31) and a back sheet (27) that is disposed further to the non-skin-surface side (T1) than the absorbent core and constitutes the outer surface of the absorbent article. The non-skin-facing surface of the back sheet is provided with an oil disposal region (R31) where vegetable oil is disposed.

Description

Absorbent article

The present invention relates to an absorbent article containing olive oil.

Patent Document 1 discloses an absorbent article containing olive oil. Olive oil is selected as the oil composition to be included in the topsheet coating. Patent Document 1 lists almond oil, sunflower oil, and rapeseed oil as oils contained in the oil composition, in addition to olive oil.

Japanese Unexamined Patent Publication No. 2019-571334

However, the components of oil such as olive oil change or deteriorate when exposed to air. The absorbent article is worn in a state of being in close contact with the skin for a certain period of time, and if the oil having deteriorated components continues to come into contact with the skin, there is a possibility that an adverse effect on the skin may occur.

Therefore, the present invention has been made to solve the above-mentioned problems, and provides an absorbent article capable of imparting the effect of olive oil to the user while suppressing the adverse effect on the skin.

The absorbent article according to one embodiment has an absorbent core and a top sheet which is arranged on the skin surface side of the absorbent core and comes into contact with the wearer's skin, and the top sheet has an acid value of 6. Olive oil having a peroxide value of .6 mg / g or less and a peroxide value of 30 meq / mg or less is arranged, and at least a part of the olive oil is provided on the skin-facing surface of the top sheet.

The absorbent article according to the other aspect has an absorbent core and a back sheet which is arranged on the non-skin surface side of the absorbent core and constitutes the outer surface of the absorbent article, and has a non-skin facing surface of the back sheet. Is provided with an oil arrangement area in which vegetable oils are arranged.

The absorbent article according to still another aspect has an absorbent core and a functional sheet arranged outside the absorbent core in the thickness direction and to which vegetable oil is applied, and the functional sheet is said to have the above-mentioned functional sheet. The basis weight of the vegetable oil on the outer surface in the thickness direction is higher than the basis weight of the vegetable oil on the inner surface in the thickness direction of the functional sheet.

FIG. 1 is a plan view of the absorbent article according to the first embodiment as viewed from the skin surface side in the unfolded state. FIG. 2 is a plan view of the absorbent article according to the first embodiment as viewed from the non-skin surface side in the unfolded state. FIG. 3 is a schematic cross-sectional view taken along the line AA shown in FIG. FIG. 4 is an enlarged plan view of a portion B shown in FIG. FIG. 5 is an enlarged cross-sectional view of a portion C shown in FIG. FIG. 6 is an enlarged schematic view showing the fibers constituting the top sheet. FIG. 7 is a plan view of the absorbent article according to the second embodiment as viewed from the non-skin surface side in the unfolded state. FIG. 8 is a schematic cross-sectional view of the absorbent article according to the second embodiment with reference to the line AA shown in FIG. FIG. 9 is an enlarged cross-sectional view of the F portion shown in FIG. FIG. 10 is a plan view of the absorbent article according to the third embodiment as viewed from the skin surface side in the unfolded state. FIG. 11 is a schematic cross-sectional view taken along the line GG shown in FIG. FIG. 12 is an enlarged cross-sectional view of the H portion shown in FIG. FIG. 13 is an enlarged cross-sectional photograph of the functional sheet.

(1) Outline of Embodiment At least the following matters will be clarified by the description of this specification and the accompanying drawings.
The absorbent article according to one embodiment has an absorbent core and a top sheet which is arranged on the skin surface side of the absorbent core and comes into contact with the wearer's skin, and the top sheet has an acid value of 6. Olive oil having a peroxide value of .6 mg / g or less and a peroxide value of 30 meq / mg or less is arranged, and at least a part of the olive oil is provided on the skin-facing surface of the top sheet. According to this aspect, since the undegraded olive oil can be attached to the skin, the effect of the olive oil can be imparted to the user while suppressing the adverse effect on the skin.

According to a preferred embodiment, the olive oil may be provided on each of the skin-facing surface of the top sheet and the non-skin-facing surface of the top sheet. According to this aspect, while the olive oil arranged on the skin-facing surface of the top sheet retains the moisture of the skin, the body fluid once absorbed by the olive oil arranged on the non-skin-facing surface of the top sheet is transferred to the skin. It suppresses the need to do so and keeps the skin clean.

According to a preferred embodiment, the top sheet may have a non-arranged region where the olive oil is not applied over the entire area of the top sheet in the thickness direction. In the non-arranged region, the olive oil is not arranged over the entire thickness direction of the top sheet, and the transfer of the body fluid to the non-skin surface side can be promoted as compared with the region where the olive oil is arranged. Therefore, the transferability of the body fluid to the absorption core can be maintained.

According to a preferred embodiment, at least a sheet pressing portion obtained by compressing the top sheet in the thickness direction may be provided, and at least a part of the olive oil may be provided in the sheet pressing portion. In general, the region where the sheet pressed portion is formed may be heated in the process of forming the sheet pressed portion, the olive oil may be denatured, and the intended function may not be sufficiently exhibited. However, since the olive oil of the present embodiment is an olive oil that has not been oxidized, the degree of deterioration can be suppressed even if heat is applied, and the desired function can be continued to be exhibited.

According to a preferred embodiment, the top sheet has a sheet pressing portion in which the top sheet is compressed at least in the thickness direction, and the top sheet has a convex portion and a concave portion recessed in the thickness direction from the convex portion. At least a part of the sheet pressing portion may be provided in the recess. Since at least a part of the sheet pressing portion is formed in the recess, even if the olive oil in the sheet pressing portion is oxidized, the oxidized olive oil can be arranged away from the skin, and the problem caused by the oxidized olive oil can be caused. Can be suppressed.

According to a preferred embodiment, the top sheet has a sheet pressing portion in which the top sheet is compressed at least in the thickness direction, and the top sheet has a convex portion and a concave portion recessed in the thickness direction from the convex portion. , The olive oil may be arranged in each of the convex portion and the concave portion. The olive oil arranged on the convex portion is easy to touch the skin and can impart an effect on the skin. On the other hand, the olive oil placed in the recess is always hard to touch the skin. By arranging the olive oil in the part that is easy to touch the skin and the part that is hard to touch the skin, the olive oil does not transfer to the skin at once, but it is easy to continuously transfer to the skin, and it is easy to continue to exert the effect of the olive oil.

According to a preferred embodiment, the basis weight of olive oil on the skin-facing surface of the top sheet may be higher than the basis weight of olive oil on the non-skin-facing surface of the top sheet. Since the basis weight of olive oil on the skin-facing surface of the top sheet is high, the effect of olive oil can be imparted to the wearer. On the other hand, since the basis weight of the olive oil on the non-skin facing surface of the top sheet is relatively low, it is possible to suppress problems such as difficulty in bonding the adhesive due to the arrangement of the olive oil.

According to a preferred embodiment, an elastic member may be joined to the non-skin facing surface of the top sheet. Since the density of olive oil in the inner region is low, the state of bonding of the elastic member to the top sheet can be maintained. Further, the shrinkage of the elastic member causes the top sheet to be brought into close contact with the wearer, and the effect of olive oil can be imparted to the wearer.

According to a preferred embodiment, the acid value of the olive oil may be 2.0 mg / g or less. According to this aspect, the deteriorated odor of olive oil can be suppressed. According to a preferred embodiment, the peroxide value of the olive oil may be 20 meq / mg or less. According to this aspect, the deteriorated odor of olive oil can be suppressed.

The absorbent article according to the other aspect has an absorbent core and a back sheet which is arranged on the non-skin surface side of the absorbent core and constitutes the outer surface of the absorbent article, and has a non-skin facing surface of the back sheet. Is provided with an oil arrangement area in which vegetable oils are arranged. The backseat is a place where a wearing assistant such as a mother can easily touch it when taking it out. Since the vegetable oil is arranged on the non-skin facing surface of the back sheet, the vegetable oil easily comes into contact with the skin of a wearing assistant such as a mother. Vegetable oils can protect the skin's moisture and keep it smooth.

According to a preferred embodiment, the vegetable oil may be a vegetable oil having an oleic acid content of 55% or more and 83% or less. Vegetable oils having an oleic acid content of 55% or more and 83% or less are relatively difficult to oxidize and deteriorate among vegetable oils. By suppressing the deterioration of vegetable oil, the deterioration of color and fragrance due to oxidation is suppressed, and it is difficult for the wearing assistant to get a sense of discomfort such as fragrance, and the user can continue to use it with confidence.

According to a preferred embodiment, the back sheet is a non-woven fabric having fibers, and the fibers include a fiber main body and an oil layer composed of a fiber treatment agent that covers the surface of the fiber main body and has hydrophilicity. The vegetable oil may be contained in the oil layer. Since the oil layer covers the surface of the fiber body, it is easy to evenly distribute the vegetable oil over the entire back sheet. When the skin of the wearing assistant touches the back sheet (that is, the fiber), the oil layer covering the surface of the fiber constituting the part touched by the wearing assistant can be easily transferred to the wearing assistant.

According to a preferred embodiment, the first waist circumference member and the second waist circumference member covering the wearer's waist circumference, the fastening tape arranged on the first waist circumference member, and the fastening tape arranged on the second waist circumference member and said. The backsheet may have a non-arranged region to which the vegetable oil is not applied, and the non-arranged region may be provided on the target portion.

According to a preferred embodiment, the backsheet may have a penetrating region to which the vegetable oil is not applied over the entire area of the backsheet in the thickness direction. A penetration area is provided and no vegetable oil is placed over the entire flat surface of the backsheet. Compared with the configuration in which the vegetable oil is arranged over the entire flat surface of the back sheet, it is difficult for the vegetable oil to keep in contact with the skin at all times, and the stickiness caused by the vegetable oil can be suppressed.

According to a preferred embodiment, the side flaps may have side flaps extending outward in the width direction from the absorption core, and at least a part of the oil arrangement region may be provided on the side flaps. Wearing assistants generally have side flaps that do not abut on the cloaca when mounting the absorbent article on the wearer, rather than grabbing the cloaca area (the area where the core is located) that abuts the cloaca. Tends to grab. By providing the oil placement area on the side flap, the mounting assistant can easily touch the back sheet in the process of mounting operation and can feel the presence of vegetable oil.

According to a preferred embodiment, the basis weight of the vegetable oil on the non-skin facing surface of the back sheet may be higher than the basis weight of the vegetable oil on the skin facing surface of the back sheet. Since the basis weight of the vegetable oil on the non-skin facing surface of the back sheet is high, the effect of the vegetable oil can be imparted to the wearing assistant. Further, the skin-facing surface of the back sheet comes into contact with a component (leakage-proof film, core wrap) located on the skin surface side of the back sheet, and is bonded to the component via an adhesive or welded to the component. Or something. At this time, since the basis weight of the vegetable oil is relatively low, it is possible to suppress problems such as difficulty in joining the adhesive due to the arrangement of the vegetable oil.

According to a preferred embodiment, an elastic member is joined to the skin-facing surface of the backsheet, and the oil arrangement region may be provided in a region overlapping the elastic member. Since the basis weight of the vegetable oil on the surface facing the skin is low, the bonded state of the elastic member to the back sheet can be maintained. Further, the elastic member is a portion that is in close contact with the body, and the wearing assistant can easily touch the region that overlaps with the elastic member in order to adjust the position of the elastic member and the body portion. By arranging the elastic member in the region overlapping with the elastic member, the mounting assistant can easily come into contact with the vegetable oil in the process of adjusting the position of the elastic member, and the effect of the vegetable oil can be imparted to the mounting assistant.

According to a preferred embodiment, the top sheet is arranged on the skin surface side of the absorption core and is in contact with the wearer's skin, and the oil arrangement region is the back sheet of the top sheet and the back sheet. May be provided only. Since there is no oil distribution area for vegetable oil on the top sheet, it is possible to impart the effect of vegetable oil to the wearing assistant while suppressing stickiness to the vegetable oil for the wearer. Wearing assistants are more likely to be concerned about the ingredients that come into contact with the newborn's skin, and can be particularly preferably used in absorbent articles for newborns.

The absorbent article according to still another aspect has an absorbent core and a functional sheet arranged outside the absorbent core in the thickness direction and to which vegetable oil is applied, and the functional sheet is said to have the above-mentioned functional sheet. The basis weight of the vegetable oil on the outer surface in the thickness direction is higher than the basis weight of the vegetable oil on the inner surface in the thickness direction of the functional sheet. The outer surface of the functional sheet is located outside the inner surface of the functional sheet in the thickness direction, is close to the outer surface of the absorbent article, and has a high basis weight of vegetable oil. Therefore, the effect of vegetable oil can be imparted to the wearer and the like. The inner surface of the functional sheet comes into contact with other components located inside the functional sheet. At this time, since the basis weight of the inner surface of the functional sheet is relatively low, it is possible to suppress problems such as difficulty in joining the adhesive due to the arrangement of the vegetable oil.

According to a preferred embodiment, an elastic member is joined to the inner surface of the functional sheet, and the vegetable oil may be provided in a region overlapping the elastic member. Since the basis weight of the vegetable oil on the inner surface of the functional sheet is low, the bonded state of the elastic member to the functional sheet can be maintained.

According to a preferred embodiment, the functional sheet is a non-woven fabric having fibers, and the functional sheet has an outer region extending inward from the outer surface of the functional sheet and an outer region from the inner surface of the functional sheet. The average fiber diameter of the outer region may be smaller than the average fiber diameter of the inner region. The inner region has a relatively large average fiber diameter as compared with the outer region, and the voids between the fibers tend to be large. The adhesive in contact with the inner region easily enters the gaps between the fibers, and it is easy to secure the adhesive force by the adhesive.

According to a preferred embodiment, the thickness of the inner region may be thicker than the thickness of the outer region. By increasing the thickness of the inner region where the gaps between the fibers can be easily secured, the adhesive can be easily drawn in, the body fluid drawn into the inner region can be easily held, and the body fluid can be drawn in.

According to a preferred embodiment, the average fiber diameter of the outer region may be 1.7 dtex or less, and the average fiber diameter of the inner region may be 3.3 dtex or more. Since the average fiber diameter in the inner region is relatively large, it is easy to secure voids between the fibers. Further, since the average fiber diameter in the outer region is relatively small, the voids between the fibers tend to be small. Therefore, it is difficult for the body fluid and the adhesive that have entered the gaps between the fibers in the inner region to move to the outer region. Therefore, the adhesive can be held in the inner region to secure the adhesive force, and the body fluid can be held in the inner region to suppress the rewetting of the absorbent article to the outer surface.

The density of the vegetable oil in the outer region may be higher than the density of the vegetable oil in the inner region. The outer region of the functional sheet is located outside the thickness direction of the inner region, is closer to the outer surface of the absorbent article, and has a high density of vegetable oil. Therefore, the effect of vegetable oil can be imparted to the wearer and the like. The inner region contacts other components located inside the functional sheet. At this time, since the density of the inner region is relatively low, it is possible to suppress problems such as difficulty in bonding the adhesive due to the arrangement of the vegetable oil.

According to a preferred embodiment, the functional sheet is disposed on the outer surface of the absorbent article, from the fiber body and the fiber treatment agent covering the surface of the fiber body and having hydrophilicity. The vegetable oil may be contained in the oil layer. Since the functional sheet is arranged on the outer surface of the absorbent article, the wearer or a wearing assistant (hereinafter referred to as the wearer or the like) can easily come into direct contact with the functional sheet. Further, since the oil layer covers the surface of the fiber, it is easy to uniformly distribute the vegetable oil over the entire functional sheet, and when the wearer or the like touches the functional sheet, the vegetable oil is easily transferred to the wearer or the like. it can. Further, since the oil layer has hydrophilicity, it can draw in body fluids such as urine and sweat and improve the feel of the outer surface of the functional sheet.

The density of fibers in the inner region may be lower than the density of fibers in the outer region. Since the density of the fibers in the inner region is lower than the density of the fibers in the outer region, it is easy to secure voids between the fibers. The adhesive in contact with the inner region easily enters the gaps between the fibers, and it is easy to secure the adhesive force by the adhesive. In addition, it is easy to retain the body fluid drawn into the functional sheet, and the pulling property of the body fluid can be improved.

According to a preferred embodiment, the functional sheet may have a sheet squeezed portion compressed at least in the thickness direction, and at least a part of the vegetable oil may be provided in the sheet squeezed portion. When forming the sheet squeezed portion, generally, the convex portion corresponding to the sheet squeezed portion is pressed against the functional sheet to squeeze the functional sheet. At this time, the convex portion may be in close contact with the functional sheet and may be difficult to separate from the functional sheet. However, since the vegetable oil is arranged at the position where the sheet pressing portion is formed, the convex portion pressed against the sheet pressing portion is easily separated from the sheet pressing portion. Therefore, the convex portion and the sheet squeezed portion can be smoothly separated from each other without providing a surface treatment on the convex portion to facilitate the separation between the convex portion and the sheet squeezed portion, and the manufacturing efficiency can be improved.

According to a preferred embodiment, the vegetable oil may be a vegetable oil having an oleic acid content of 55% or more and 83% or less. Vegetable oils having an oleic acid content of 55% or more and 83% or less are relatively difficult to oxidize and deteriorate among vegetable oils. By suppressing the deterioration of vegetable oil, the deterioration of color and fragrance due to oxidation is suppressed, and the wearer and the like are less likely to get a sense of discomfort such as fragrance, and can continue to use with confidence.

(2) Absorbent article according to the first embodiment The absorbent article according to the first embodiment will be described below with reference to the drawings. In the description of the drawings below, the same or similar parts are designated by the same or similar reference numerals. However, it should be noted that the drawings are schematic and the ratio of each dimension is different from the actual one. Therefore, the specific dimensions, etc. should be determined in consideration of the following explanation. In addition, there may be parts in which the relations and ratios of the dimensions of the drawings are different from each other.

The absorbent article according to the present invention is an absorbent article capable of absorbing the body fluid of the wearer. The wear target can be an example of an infant and an elderly person. The absorbent article may be a disposable urine and an incontinence pad that absorbs urine, a sanitary napkin that absorbs menstrual blood, or a vaginal discharge sheet that absorbs vaginal discharge. The disposable diaper may be a pants-type diaper or a tape-type diaper. The absorbent article according to the embodiment is a tape-type disposable diaper. FIG. 1 is a schematic plan view of the absorbent article 1 according to the first embodiment as viewed from the skin surface side in the unfolded state. FIG. 2 is a schematic plan view of the absorbent article 1 according to the first embodiment as viewed from the non-skin surface side in the unfolded state. The schematic plan view shown in FIGS. 1 and 2 shows an elongated state in which the absorbent article 1 is extended to a state in which wrinkles are not formed. FIG. 3 is a schematic cross-sectional view taken along the line AA shown in FIG. In the schematic cross-sectional view, for convenience of explanation, the members may be separated in the thickness direction T, but in an actual product, they are in contact with the thickness direction T.

The absorbent article 1 has a front-rear direction L and a width direction W that are orthogonal to each other. The anteroposterior direction L is defined by the direction extending to the anterior side and the posterior side of the body. In other words, the anteroposterior direction L is a direction extending anterior-posteriorly in the deployed absorbent article 1. Further, the absorbent article 1 has both the front-rear direction L and the width direction W orthogonal to each other in the thickness direction T. The thickness direction T extends to the skin surface side T1 facing the wearer side and the non-skin surface side T2 opposite to the skin surface side T1. The absorbent article 1 has a front waist circumference area S1, a rear waist circumference area S2, and an inseam area S3. The front waist circumference area S1 is a region facing the front waist circumference (abdomen) to be worn. The rear waist circumference area S2 is an area facing the rear waist circumference (back) of the object to be worn. The inseam area S3 is an area located in the inseam to be worn and arranged between the front waist area S1 and the rear waist area S2, and may be an area provided with a leg opening 65. The leg circumference opening 65 is a portion recessed inward in the width direction from the outer edge of the disposable diaper. Here, the outer edge in the present invention is an outer edge in the width direction W, and the outer portion is a portion that occupies a certain range in the width direction W including the outer edge in the width direction W. The inner edge is an inner edge in the width direction W, and the inner portion is a portion that occupies a certain range in the width direction W including the inner edge in the width direction W.

The absorbent article 1 includes an absorbent core 31 containing an absorbent material. The absorbent core 31 contains an absorbent material such as ground pulp or a highly absorbent polymer (SAP), or a mixture thereof. The absorption core 31 may be covered with a core wrap (not shown). The absorber may be composed of the absorption core 31 and the core wrap. The core wrap is made of tissue or SMS non-woven fabric and may be arranged on the skin surface side T1 of the absorption core 31 and the non-skin surface side T2 of the absorption core 31. As shown in FIG. 3, the absorbent article 1 has a skin-side sheet 20 located on the skin-side T1 of the absorbent core 31. The skin-side sheet 20 covers the absorbent core 31 and is arranged throughout the absorbent article 1. The skin side sheet 20 of the present embodiment includes a top sheet 21, a second sheet 23, and a core wrap. The top sheet 21 has a center sheet 21C arranged so as to straddle the center of the absorption core 31 in the width direction W, and a side sheet 21S that covers the outer side portion of the top sheet 21. The top sheet 21 may be made of a liquid-permeable sheet such as a non-woven fabric or a perforated plastic film.

Each of the pair of side seats 21S may form a leak-proof gather 60. The inner portions of the side seats 21S are folded back and overlapped, and a leak-proof elastic member 61 that expands and contracts in the front-rear direction L may be provided between the overlapped side seats 21S. The leak-proof elastic member 61 may be made of a rubber thread that expands and contracts in the front-rear direction L. The leak-proof gathers stand up on the skin surface side T1 due to the contraction of the leak-proof elastic member 61, and form a wall to prevent lateral leakage on the side of the center in the width direction of the absorbent article 1.

FIG. 4 is an enlarged plan view of the portion B shown in FIG. FIG. 5 is an enlarged cross-sectional view of a portion C shown in FIG. As shown in FIG. 4, the absorbent article 1 may have at least a sheet pressing portion 28 in which the top sheet 21 is compressed in the thickness direction. A plurality of sheet pressing portions 28 may be provided at intervals in a plan view. The sheet pressing portions 28 of the present embodiment are point-shaped and are arranged at intervals in the front-rear direction L and at intervals in the width direction W. The sheet pressing portion 28 may be configured to be visible from the skin surface side T1 of the absorbent article 1. Further, as shown in FIG. 5, the top sheet 21 may have a convex portion 211 and a concave portion 212 recessed in the thickness direction T from the convex portion 211. The convex portion 211 and the concave portion 212 extend in the front-rear direction L and may be arranged alternately in the width direction W. The convex portion 211 may be a portion where the basis weight of the absorbing material is higher than that of the concave portion 212, or the convex portion 211 may be a portion where the basis weight of the absorbing material is the same as that of the concave portion 212 but the density is lower than that of the concave portion 212. Good. In the present embodiment, the center sheet 21C constituting the top sheet 21 is provided with the sheet pressing portion 28, the convex portion 211 and the concave portion 212, and the side sheet 21S is provided with the sheet pressing portion 28, the convex portion 211 and the concave portion 212. Is not provided.

The absorbent article 1 has a non-skin side sheet 25 located on the non-skin side T2 of the absorption core 31. The non-skin side sheet 25 covers the absorbent core 31 and is arranged throughout the disposable diaper. The non-skin side sheet 25 of this embodiment includes a back sheet 26 and an exterior sheet 27. The back sheet 26 is a liquid-impermeable sheet, and a breathable resin film is bonded to a polyethylene sheet, a laminated non-woven fabric mainly made of polypropylene or the like, a breathable resin film, a spunbond, or a non-woven fabric such as spunlace. A sheet or the like can be used. The exterior sheet 27 may be provided on the non-skin surface side T2 of the back sheet 26. The exterior sheet 27 may be made of a liquid-permeable non-woven fabric. The length of the back sheet 26 in the width direction W is shorter than the length of the exterior sheet 27 in the width direction W, and the length of the back sheet 26 in the front-rear direction L is shorter than the length of the exterior sheet 27 in the front-rear direction L. Good. The absorbent article 1 has an indicator 70 that is discolored by contact with moisture on the non-skin surface side T2 of the absorbent core 31. The indicator 70 is configured so that the absorption core 31 discolors when it absorbs the body fluid, and the absorption state of the body fluid can be grasped from the non-skin surface side T2 of the absorbent article 1. The indicator 70 may be arranged on the non-skin surface side of the absorption core 31, and may be provided on the back sheet 26 or the exterior sheet 27. Preferably, the indicator 70 may be provided on the skin side surface of the backseat 26.

Fastening tape 90 is provided in the rear waist circumference area S2. The fastening tape 90 has a base portion 92 and a locking portion 93. At least a part of the base portion 92 is joined between the skin side sheet 20 and the non-skin side sheet 25, and extends from the skin side sheet 20 and the non-skin side sheet 25 to the outside in the width direction W. The locking portion 93 is provided on the base portion 92 and is detachably fastened to the target portion 95 (see FIG. 2) of the front waist circumference region S1. The fastening tape 90 extends along the width direction W in the rear waist circumference region S2 and is fastened to the target portion 95 to hold the absorbent article 1 on the wearer's body. The target portion 95 is arranged in the front waist circumference region S1 and is configured so that the fastening tape 90 is fixed to each other. In the modified example, the absorbent article 1 may be configured such that the fastening tape 90 is fixed to the non-skin side surface of the non-skin side sheet 25 without providing the target portion.

The absorbent article 1 has a waist opening 66 that surrounds the wearer's waist. The waist opening 3.5 is composed of a rear end edge 10R and a front end edge 10F of a disposable diaper, and is a portion that surrounds the waist with the fastening tape 90 fixed to the target portion 95. A leg elastic member 67 extending in the front-rear direction L may be provided between the skin-side sheet 20 and the non-skin-side sheet 25. The leg circumference elastic member 67 may be arranged along the leg circumference opening 65 at least in the inseam region S3 outside the absorption core 31 in the width direction W. In the modified example, a waist elastic member extending in the width direction W may be provided between the skin side sheet 20 and the non-skin side sheet 25. The contraction of the elastic member around the waist can improve the fit of the wearer to the waist.

Olive oil is arranged on at least the top sheet 21 of the absorbent article 1 of the present embodiment. Next, olive oil will be described. Examples of olive oil include extra virgin olive oil, virgin olive oil, ordinary virgin olive oil, lampante virgin olive oil, refined olive oil, pure olive oil, refined olive pommers oil, and olive pommers oil. Since the olive oil is arranged, the effect of the olive oil can be imparted to the wearer and the wearing assistant. The effects of olive oil can be, for example, moisturizing the skin, moisturizing the skin, keeping the skin smooth, and imparting aroma.

FIG. 6 is an enlarged schematic view showing the fibers 55 constituting the top sheet. FIG. 6A is an enlarged schematic view showing the fibers 55 constituting the non-woven fabric. FIG. 6B is a schematic cross-sectional view showing a cross-sectional view taken along the line DD of FIG. 6A. The fiber 55 constituting the top sheet 21 of the present embodiment has a fiber body 551 and an oil layer 552. The surface of the fiber body 551 is covered with an oil layer 552 made of a hydrophilic fiber treatment agent. Olive oil is present in the oil layer 552. Olive oil is applied to the top sheet 21 by the oil layer 552 that covers the fiber body 551 in this way. Therefore, olive oil can be arranged on substantially the entire surface of the fiber body, and olive oil can be arranged not only on the skin-facing surface and the non-skin-facing surface of the top sheet, but also on the inner portion in the thickness direction. Further, in the modified example, olive oil may be applied to the top sheet 21 by applying olive oil or a fiber treatment agent containing olive oil after molding the top sheet 21.

At least a part of olive oil is arranged on the skin-facing surface of the top sheet 21. Since the olive oil is arranged on the skin-facing surface of the top sheet 21, the olive oil comes into contact with the wearer's skin, and the moisture of the skin can be protected and the skin can be kept smooth. Olive oil may be arranged over the entire surface of the top sheet 21 facing the skin, or may be arranged intermittently. The olive oil of the present embodiment is arranged on the surface of the fiber main body 551, is arranged in the region where the fibers 55 are arranged, and is not arranged in the gap G between the fibers 55.

Olive oil may have an acid value of 6.6 mg / g or less and a peroxide value of 30 meq / mg or less. As described above, a plurality of types of olive oil are distributed, which are distinguished by quality grade and the like. There is room for improvement in selecting an appropriate olive oil while suppressing adverse effects such as irritation to the skin, deterioration of the olive oil, and deterioration of the constituent members constituting the absorbent article 1 when the olive oil is provided in the absorbent article 1. was there. As a result of diligent research by the applicant, it was found that olive oil having an acid value of 6.6 mg / g or less and a peroxide value of 30 meq / mg or less is suitable. Olive oil having an acid value of 6.6 mg / g or less and a peroxide value of 30 meq / mg or less can be exemplified as extra virgin olive oil, virgin olive oil, or ordinary virgin olive oil. Olive oil having an acid value of 6.6 mg / g or less is not oxidized and can bring the unoxidized olive oil into contact with the skin. Oxidized (high acid) olive oil increases lower fatty acids and can be irritating to the skin. However, by defining the acid value, it is possible to provide an absorbent article containing olive oil, which is safe for consumers. Further, when the peroxide value is 30 meq / mg or less, it is possible to provide consumers with an absorbent article containing unoxidized olive oil. Since the peroxide value of olive oil is 30 meq / mg or less, it is difficult for olive oil to be automated and oxidized, and it is difficult for hydroperoxide to be produced. When hydroperoxide is produced, it is decomposed by metal ions, passed through peroxy radicals, and hydroperoxide is produced again, resulting in a higher peroxide value. Higher peroxide values can cause irritation to the skin. However, it is easy to maintain a state in which the peroxide value of olive oil is low, and it is possible to provide an absorbent article that suppresses irritation to the skin. In addition, since olive oil is originally an unsaturated fatty acid that is difficult to oxidize, by using olive oil having a low peroxide value from the time of compounding, it is possible to provide an absorbent article that further suppresses irritation to the skin. Since it is possible to add olives that have not deteriorated, deterioration of color and fragrance is suppressed, and it is difficult for the wearer to get a sense of discomfort such as fragrance, and the wearer can continue to use it with peace of mind.

Here, the acid value and peroxide value of olive oil can be measured by the following methods. The acid value can be measured using the test paper AV-CHECK / ADVANTEC for determining the degree of deterioration of heated fats and oils. Specifically, 5 ml of olive oil to be measured is measured, and the olive oil is attached to the test paper. After 2 seconds have passed, wipe the object to be measured on the test paper with a filter paper. After 30 seconds have passed, the color of the test paper is confirmed, and the color of the color sample and the test paper are visually compared to measure the acid value. The peroxide value can be measured using POV test paper (peroxide value test paper) / SIBATA (Sibata Scientific Technology). Specifically, 5 ml of olive oil to be measured is measured and attached to the front surface of the test unit. After 3 minutes, rinse with tap water until the color is uniform. Then, after draining water and placing it on a flat place for 20 seconds, the color of the test paper is confirmed, and the color sample and the color of the test paper are visually compared to measure the peroxide value. If 5 ml of olive oil cannot be extracted, the acid value and peroxide value may be measured on the test paper by adhering it to the surface on which the olive oil is arranged.

Olive oil may be arranged on the skin-facing surface of the top sheet 21 and the non-skin-facing surface of the top sheet 21, respectively. A film of olive oil can be formed on the non-skin facing surface of the top sheet 21, and when body fluid such as urine permeates the top sheet 21 and migrates to the absorption core 31, it becomes difficult for the once transferred body fluid to return to the skin side. The olive oil arranged on the skin-facing surface of the top sheet 21 retains the moisture of the skin, while the olive oil arranged on the non-skin-facing surface of the top sheet suppresses the transfer of the once absorbed body fluid to the skin. , Can keep the skin clean.

The top sheet 21 may have a non-arranged region where olive oil is not applied over the entire area of the top sheet 21 in the thickness direction T. The non-arranged region is, for example, a region where the gap G between the fibers is continuous in the thickness direction T. In the non-arranged region, the olive oil is not arranged over the entire thickness direction of the top sheet, and the transfer of the body fluid to the non-skin surface side can be promoted as compared with the region where the olive oil is arranged. Therefore, the transferability of the body fluid to the absorption core can be maintained. Further, as compared with the configuration in which the olive oil is arranged over the flat surface of the top sheet, it is difficult for the olive oil to keep in contact with the skin at all times, and the deterioration of the olive oil can be further suppressed.

At least a part of olive oil may be provided in the sheet pressing portion 28. Generally, the region where the sheet pressing portion 28 is formed is heated in the forming step of the sheet pressing portion 28. If olive oil is applied to the top sheet 21 before the sheet pressing portion 28 is formed, the olive oil may be denatured due to heating in the forming step of the sheet pressing portion 28, and the intended function may not be sufficiently exhibited. However, since the olive oil of the present embodiment is an olive oil that has not been oxidized, the degree of deterioration can be suppressed even if heat is applied, and the desired function can be continued to be exhibited.

As shown in FIGS. 4 and 5, at least a part of the sheet pressing portion 28 may be provided in the recess 212. The sheet pressing portion 28 generates heat during processing, and the olive oil is more likely to be oxidized as compared with the region where the sheet pressing portion 28 is not provided. Since at least a part of the sheet pressing portion 28 is formed in the recess 212, even if the olive oil in the sheet pressing portion 28 is oxidized, the oxidized olive oil can be arranged away from the skin, and the oxidized olive oil is used. Problems can be suppressed. In the modified example, the olive oil may be arranged in each of the convex portion 211 and the concave portion 212. The olive oil arranged on the convex portion 211 is easy to touch the skin and can impart an effect on the skin. On the other hand, the olive oil placed in the recess is always hard to touch the skin. By arranging the olive oil in the part that is easy to touch the skin and the part that is hard to touch the skin, the olive oil does not transfer to the skin at once, but it is easy to continuously transfer to the skin, and it is easy to continue to exert the effect of the olive oil.

The basis weight of olive oil on the skin-facing surface (outer surface) 213 of the top sheet 21 is higher than the basis weight of olive oil on the non-skin-facing surface (inner surface) 214 of the top sheet 21. When the top sheet 21 is arranged on the outer surface of the absorbent article 1, when the wearer or the like touches the top sheet 21, the olive oil can be transferred to the wearer or the like, and the effect of the olive oil on the wearer or the like. Can be granted. Further, when the top sheet 21 is arranged inside the outer surface of the absorbent article 1 (for example, of the second sheet 23), when the outer surface of the absorbent article 1 is pressed, the absorbent article 1 Olive oil easily exudes to the outer surface, and the effect of olive oil can be imparted to the wearer and the like. The inner surface of the top sheet 21 is joined to other constituent members located inside the top sheet 21 via an adhesive, or is welded to the other constituent members. At this time, since the basis weight of the olive oil on the inner surface 214 of the top sheet 21 is relatively low, it is possible to suppress problems such as difficulty in joining the adhesive due to the arrangement of the olive oil.

The basis weight of olive oil on the outer surface of the top sheet and the basis weight of olive oil on the inner surface of the top sheet can be compared by the following methods. Prepare two sheets of filter paper and impregnate each with hexane. One filter paper is applied to the outer surface of the top sheet, the other filter paper is applied to the inner surface of the top sheet, and the olive oil of the top sheet is transferred to each of the two filter papers. The basis weight of olive oil transferred to the filter paper is compared with the basis weight of olive oil on the outer surface of the top sheet and the basis weight of olive oil on the inner surface of the top sheet. The basis weight of olive oil transferred to the filter paper can be measured by a well-known method, and for example, a high performance liquid chromatography (HPLC) method can be used. When the fiber treatment agent contains olive oil substantially uniformly, the comparison result can be replaced with the comparison result of olive oil by comparing the basis weight of the fiber treatment agent.

As shown in FIG. 5, the top sheet 21 may have an outer region R11 extending inward from the outer surface 213 of the top sheet 21 and an inner region R12 extending outward from the inner surface 214 of the top sheet 21. The outer region R11 and the inner region R12 may be adjacent to each other. The outer region R11 of the present embodiment extends from the skin-facing surface of the center sheet 21C to the non-skin surface side T2, and the inner region R12 is located on the non-skin surface side T2 of the outer region R11 and is not the center sheet 21C. It extends from the skin facing surface to the skin surface side T1. The average fiber diameter of the outer region R11 is smaller than the average fiber diameter of the inner region R12. That is, the outer region R11 is a region having a smaller average fiber diameter than the inner region R12. The outer region R11 has a relatively small average fiber diameter and tends to have a large fiber surface area as compared with the inner region R12. It is possible to secure a surface area to which olive oil can adhere and increase the content of olive oil in the outer region R11. On the other hand, the inner region R12 has a relatively large average fiber diameter as compared with the outer region R11, and the gaps between the fibers tend to be large. The adhesive in contact with the inner region R12 easily enters the gaps between the fibers, and it is easy to secure the adhesive force by the adhesive. The thickness of the inner region R12 may be thicker than the thickness of the outer region R11. By increasing the thickness of the inner region where it is easy to secure voids between fibers, it is easy to hold the adhesive and it is easier to secure the adhesive force by the adhesive.

The average fiber diameter can be measured by the following method. Cut the top sheet with scissors to a size of 10 mm x 10 mm. Place the sample on the observation plate so that the outer region of the cut sample is in contact with the observation plate. Observe the cross section using a digital microscope VHX-7000 / KEYENCE and measure the fiber diameter of the fibers that make up the sample. As the fiber diameter, the average value of the fiber diameters of the 10 cut fibers is adopted. The boundary between the outer region R11 and the inner region R12 may be a portion where eight or more of the ten cut-out fiber diameters differ in fiber diameter.

The average fiber diameter of the outer region R11 may be 1.7 dtex or less, and the average fiber diameter of the inner region R12 may be 3.3 dtex or more. Since the average fiber diameter of the inner region R12 is 3.3 dtex or more and the fiber diameter is relatively large, it is easy to secure voids between the fibers. Further, since the average fiber diameter of the outer region R11 is 1.7 dtex or less and the fiber diameter is relatively small, the voids between the fibers tend to be small. Therefore, it is difficult for the body fluid and the adhesive that have infiltrated into the gap G between the fibers in the inner region R12 to move to the outer region R11. Therefore, the adhesive can be held in the inner region R12 to secure the adhesive force, and the body fluid can be held in the inner region R12 to suppress the rewetting of the absorbent article to the outer surface. In addition, when the top sheet 21 constitutes the outer surface of the absorbent article 1, when the wearer or the like touches the top sheet 21, the top sheet 21 may be softly deformed or have a smooth touch, or the wearer or the like may have skin. It is easy to have a kind heart. Therefore, in addition to the efficacy of olive oil, it is easy for the wearer or the like to recognize that it is an absorbent article 1 that is gentle on the skin.

The thickness of the inner region R12 may be thicker than the thickness of the outer region R11. By increasing the thickness of the inner region where it is easy to secure the voids between the fibers, it is easy to hold the body fluid drawn inward in the thickness direction, and the pullability of the body fluid can be improved. Preferably, the ratio of the thickness of the inner region R12 to the entire top sheet 21 may be 80% or more. It is easier to secure voids between fibers, and it is possible to further improve the adhesive force and the pulling property of body fluids by the adhesive. The thickness of the inner region R12 and the thickness of the outer region R11 are measured by observing the cross section using a digital microscope VHX-7000 / KEYENCE in the same manner as the method for measuring the average fiber diameter.

The density of olive oil in the outer region R11 may be higher than the density of olive oil in the inner region R12. The outer region R11 of the top sheet 21 is located outside the inner region R12 in the thickness direction T, is close to the outer surface of the absorbent article 1, and has a high density of olive oil. Therefore, when the top sheet 21 is arranged on the outer surface of the absorbent article 1, when the wearer or the like touches the top sheet 21, the olive oil can be transferred to the wearer or the like, and the olive oil can be transferred to the wearer or the like. Can be given the effect of. Further, when the top sheet 21 is arranged inside the outer surface of the absorbent article 1 (for example, of the second sheet 23), when the outer surface of the absorbent article 1 is pressed, the absorbent article 1 Olive oil easily exudes to the outer surface, and the effect of olive oil can be imparted to the wearer and the like. The inner region R12 having a low density of olive oil constitutes the inner surface of the top sheet 21 and comes into contact with other constituent members (leakage-proof film, core wrap, second sheet, elastic member) located inside the top sheet 21. It is joined to the constituent members of the above via an adhesive, or welded to other constituent members. At this time, since the density of the olive oil is relatively low, it is possible to suppress problems such as difficulty in joining the adhesive due to the arrangement of the olive oil.

The density of the fibers in the inner region R12 may be lower than the density of the fibers in the outer region R11. Since the density of the fibers in the inner region R12 is lower than the density of the fibers in the outer region R11, it is easy to secure the gap G between the fibers. The adhesive in contact with the inner region R12 easily enters the gaps between the fibers, and it is easy to secure the adhesive force by the adhesive. In addition, it is easy to hold the body fluid drawn into the top sheet 21, and the pulling property of the body fluid can be improved.

An elastic member may be joined to the inner surface (inner surface in the thickness direction) of the top sheet 21, and olive oil may be provided in a region overlapping the elastic member. Examples of the elastic member include the leg circumference elastic member 67 and the waist circumference elastic member. Since the basis weight of olive oil on the inner surface of the top sheet 21 is low, the bonded state of the elastic member with respect to the top sheet 21 can be maintained. Further, the elastic member is a portion that is in close contact with the body, and the wearer or the like can easily touch the region that overlaps with the elastic member in order to adjust the position of the elastic member and the body portion. By arranging the elastic member in the region overlapping with the elastic member, the wearer or the like can easily come into contact with the olive oil in the process of adjusting the position of the elastic member, and the effect of the olive oil can be imparted to the wearer or the like.

Next, the evaluation results for the odor of olive oil will be explained. In evaluations 1 to 4, the odor was sensory evaluated by 10 testers using the olive oils of Examples 1 to 3. The olive oils of Examples 1 to 3 have a constant acid value and different peroxide values. Table 1 shows the evaluation results. Evaluation 1 is an evaluation of whether or not the odor of fresh olive oil is felt, and the person who has a good scent of fresh olive oil was selected from Example 1 and Example 3. The numbers in Table 1 are the number of people selected. Specifically, in evaluation 1, eight testers evaluated that the olive oil of Example 1 had a fresh olive oil odor, and two testers evaluated that the olive oil of Example 3 had a fresh olive oil odor. Then I evaluated it. From the result of evaluation 1, it was found that the peroxide value of 10 (meq / mg) is more suitable than 30 (meq / mg) for the odor of fresh olive oil. In addition, in evaluations 2 to 4, it was evaluated whether or not the odor of deteriorated olive oil was felt, and the person who smelled the deteriorated olive oil was selected. For evaluation 2, one of Example 1 and Example 3 having a deteriorated olive oil scent was selected. According to Evaluation 2, it was judged that Example 1 did not have the scent of olive oil deteriorated as compared with Example 3. For evaluation 3, one of Example 2 and Example 3 having a deteriorated olive oil scent was selected. According to the evaluation 3, it was judged that Example 2 did not have the scent of olive oil deteriorated as compared with Example 3. For evaluation 4, one of Example 1 and Example 2 having a deteriorated olive oil scent was selected. According to the evaluation 4, it was judged that Example 1 did not have the scent of olive oil deteriorated as compared with Example 2. From the results, it is preferable that the peroxide value is low with respect to the deteriorated odor of olive oil. The peroxide value of olive oil is preferably 20 (meq / mg) or less, and more preferably 10 (meq / mg) or less.

For evaluations 5 to 7, the odor was sensory evaluated by 10 testers using the olive oils of Examples 3 to 5. The olive oils of Examples 3 to 5 have a constant peroxide value and different acid values. In evaluations 5 to 7, it was evaluated whether or not the odor of deteriorated olive oil was felt, and the person who smelled the deteriorated olive oil was selected. For evaluation 5, the one with the scent of deteriorated olive oil was selected from Example 3 and Example 4. According to the evaluation 5, it was judged that Example 3 did not have the scent of olive oil deteriorated as compared with Example 4. For evaluation 6, one of Example 3 and Example 5 having a deteriorated olive oil scent was selected. According to Evaluation 6, it was determined that Example 3 did not have the scent of olive oil deteriorated as compared with Example 5. For evaluation 7, one of Example 4 and Example 5 having a deteriorated olive oil scent was selected. According to the evaluation 7, it was judged that Example 4 did not have the scent of olive oil deteriorated as compared with Example 5. From the results, it is preferable that the acid value is low with respect to the deteriorated odor of olive oil. The acid value of olive oil may be preferably 2.0 (mg / g) or less, and more preferably 1.0 (mg / g) or less.

(3) Absorbent article according to the second embodiment Next, the absorbent article according to the second embodiment will be described with reference to the drawings. In the following description, the same components as those in the above-described first embodiment will be described with reference to the same reference numerals. Conventionally (for example, the above-mentioned Patent Document 1), an absorbent article containing a vegetable oil has been disclosed. Vegetable oils are selected as the oil composition contained in the topsheet coating. In Patent Document 1, in addition to olive oil, almond oil, sunflower oil, and rapeseed oil are mentioned as vegetable oils. In Patent Document 1, the oil composition containing vegetable oil is provided on the top sheet that comes into contact with the wearer's skin. Therefore, the effect of vegetable oil can be imparted to the wearer. However, some wearing assistants may be conscious of not touching the top sheet in the process of wearing the absorbent article in order to ensure the hygiene of the top sheet that touches the wearer's skin. Therefore, it is difficult for the wearing assistant to come into contact with the vegetable oil, and the effect of the vegetable oil may not be sufficiently imparted to the wearing assistant. Further, an absorbent article in which a non-woven fabric is arranged on the outer surface of the absorbent article is widely used. In the case of the absorbent article in which the non-woven fabric is arranged on the outer surface of the absorbent article, the hands of the wearing assistant may become dry in the process of repeatedly exchanging the absorbent article. The absorbent article according to the second embodiment is made to solve the above-mentioned problems. Provided is an absorbent article capable of imparting the effect of vegetable oil to a wearing assistant.

FIG. 7 is a schematic plan view of the absorbent article 1X according to the second embodiment as viewed from the non-skin surface side in the unfolded state. FIG. 8 is a schematic cross-sectional view of the absorbent article 1X according to the second embodiment with reference to the line AA shown in FIG. FIG. 9 is an enlarged cross-sectional view of the F portion shown in FIG. In the schematic cross-sectional view, for convenience of explanation, the members may be separated in the thickness direction T, but in an actual product, they are in contact with the thickness direction T.

The absorbent article 1X has a side flap 48 extending outward in the width direction from the absorbing core 31. The side flap 48 is the region between the outer edge of the absorbent core 31 and the outer edge of the absorbent article 1X. At least the skin side sheet 20 and the non-skin side sheet 25 are arranged on the side flap 48. Fastening tape 90 is provided on the absorbent article 1X. The fastening tape 90 is provided in the rear waist circumference region S2. The target portion 95 is provided in the front waist circumference region S1. Therefore, the rear girth area S2 of the present embodiment constitutes the first girth area of the first girth member and the second girth member covering the wearer's girth, and the front girth area S1 constitutes the second girth area. To do. The fastening tape 90 has a base portion 92 and a locking portion 93. At least a part of the base portion 92 is joined between the skin side sheet 20 and the non-skin side sheet 25, and extends from the skin side sheet 20 and the non-skin side sheet 25 to the outside in the width direction W. The locking portion 93 is provided on the base portion 92 and is detachably fastened to the target portion 95 (see FIG. 2) of the front waist circumference region S1. The fastening tape 90 extends along the width direction W in the rear waist circumference region S2 and is fastened to the target portion 95 to hold the absorbent article 1X on the wearer's body. The target portion 95 is arranged in the front waist circumference region S1 and is configured so that the fastening tape 90 is fixed to each other. In the modified example, the absorbent article 1X may be configured such that the fastening tape 90 is fixed to the non-skin facing surface of the non-skin side sheet 25 without providing the target portion.

Absorbent article 1X has an oil arrangement region R31 in which vegetable oil is arranged. The oil arrangement region R31 is a region in which vegetable oil is arranged in a plan view. The vegetable oil is arranged at least on the back sheet 27 which is arranged on the non-skin surface side T2 of the absorbing core 31 and constitutes the outer surface of the absorbent article. The back seat 27 is a place where a wearing assistant such as a mother can easily touch it when taking it out. Since the vegetable oil is arranged on the non-skin facing surface of the back sheet 27, the vegetable oil easily comes into contact with the skin of a wearing assistant such as a mother. Vegetable oils can protect the skin's moisture and keep it smooth. In particular, when the back sheet 27 is in the form of a non-woven fabric, the skin of the wearing assistant can be protected even when the back sheet 27 is repeatedly touched with the non-woven fabric. The vegetable oil may be any oil that can impart a suitable effect to the wearing assistant, and examples thereof include olive oil, jojoba oil, rice oil, shea butter, tea oil, aloe oil, argan oil, and peach oil. Examples of olive oil include extra virgin olive oil, virgin olive oil, ordinary virgin olive oil, lampante virgin olive oil, refined olive oil, pure olive oil, refined olive pommers oil, and olive pommers oil. By arranging the olive oil, the effect of the olive oil can be imparted to the wearer and the wearing assistant. The effects of olive oil can be, for example, moisturizing the skin, moisturizing the skin, keeping the skin smooth, and imparting aroma.

Preferably, the vegetable oil may be a vegetable oil having an oleic acid content of 55% or more and 83% or less. Examples of the vegetable oil include olive oil, rapeseed oil, and peanut oil. Vegetable oils having an oleic acid content of 55% or more and 83% or less are relatively difficult to oxidize and deteriorate among vegetable oils. By suppressing the deterioration of vegetable oil, the deterioration of color and fragrance due to oxidation is suppressed, and it is difficult for the wearing assistant to get a sense of discomfort such as fragrance, and the user can continue to use it with confidence. The content of oleic acid can be measured based on "Procedure for measuring the ratio of oleic acid to fatty acids in edible vegetable oils and fats" in GC-MS (Japanese Agricultural Standard). Further, olive oil may have an acid value of 6.6 mg / g or less and a peroxide value of 30 meq / mg or less.

The back sheet 27 may be made of a non-woven fabric having fibers. The fiber 55 constituting the back sheet 27 of the present embodiment has a fiber main body 551 and an oil layer 552 as shown in the enlarged schematic view of the top sheet shown in FIG. The schematic enlarged view of the back sheet of the present embodiment is the same as the schematic enlarged view of the top sheet of FIG. The surface of the fiber body 551 is covered with an oil layer 552 made of a hydrophilic fiber treatment agent. Vegetable oil is present in the oil layer 552. In this way, the oil layer 552 that covers the fiber body 551 imparts vegetable oil to the constituent members. Therefore, it is easy to uniformly distribute the vegetable oil over the entire back sheet 27. Vegetable oil can be arranged not only on the skin-facing surface and the non-skin-facing surface of the back sheet 27, but also on the inner portion in the thickness direction. When the skin of the wearing assistant touches the back sheet (that is, the fiber), the oil layer covering the surface of the fiber constituting the part touched by the wearing assistant can be easily transferred to the wearing assistant. Further, since the oil layer has hydrophilicity, body fluids such as sweat easily move to the skin surface side. For example, even when the hands of the wearing assistant are moist due to sweat or the like, the back seat 27 can draw in the moisture and improve the feel of the surface of the back seat 27. As shown in FIG. 6, the gap G between the fibers 55 constitutes a non-arranged region in which the fiber main body 551 and the oil layer 552 are not arranged and the vegetable oil is not arranged. In FIG. 8, since the non-arranged region is smaller than the oil-arranged region R31, the region where the backsheet 27 is arranged is shown as the oil-arranged region R31 for convenience. Further, in the modified example, the vegetable oil may be applied to the constituent members by applying the vegetable oil or the fiber treatment agent containing the vegetable oil after molding the constituent members such as the back sheet 27.

The vegetable oil may be arranged on each of the skin-facing surface (inner surface) 272 of the back sheet 27 and the non-skin-facing surface (outer surface) 271 of the back sheet 27. Further, the back sheet 27 may have a penetrating region in which vegetable oil is not applied over the entire area of the back sheet 27 in the thickness direction T. The penetration region is, for example, a region where the gap G between the fibers is continuous in the thickness direction T. In the penetrating region, the vegetable oil is not arranged over the entire thickness direction T of the backsheet 27, and the vegetable oil is not arranged over the entire plane of the backsheet 27. Compared with the configuration in which the vegetable oil is arranged over the entire plane of the back sheet 27, it is difficult for the vegetable oil to keep in contact with the skin at all times, and stickiness due to the vegetable oil can be suppressed. The penetrating region is composed of a portion of the back sheet 27 including the oil layer 552 containing the vegetable oil in which the portions between the fibers 55 are continuous in the thickness direction, and a non-applied region of the vegetable oil in the configuration in which the vegetable oil is applied after the back sheet 27 is formed. ..

The basis weight of the vegetable oil on the outer surface 271 of the back sheet 27 is higher than the basis weight of the vegetable oil on the inner surface 272 of the back sheet 27. When the wearer or the like touches the back seat 27, the vegetable oil can be transferred to the wearer or the like, and the effect of the vegetable oil can be imparted to the wearer or the like. The inner surface 272 of the back sheet 27 is joined to other constituent members located inside the back sheet 27 via an adhesive, or is welded to the other constituent members. At this time, since the basis weight of the vegetable oil on the inner surface 272 of the back sheet 27 is relatively low, it is possible to suppress problems such as difficulty in joining the adhesive due to the arrangement of the vegetable oil.

The basis weight of vegetable oil on the outer surface of the back sheet and the basis weight of vegetable oil on the inner surface of the back sheet can be compared by the following methods. Prepare two sheets of filter paper and impregnate each with hexane. One filter paper is applied to the outer surface of the back sheet, the other filter paper is applied to the inner surface of the back sheet, and the vegetable oil of the back sheet is transferred to each of the two filter papers. The basis weight of the vegetable oil transferred to the filter paper is compared with the basis weight of the vegetable oil on the outer surface of the back sheet and the basis weight of the vegetable oil on the inner surface of the back sheet. The basis weight of the vegetable oil transferred to the filter paper can be measured by a well-known method, and for example, a high performance liquid chromatography (HPLC) method can be used. When the fiber treatment agent contains vegetable oil substantially uniformly, the comparison result can be replaced with the comparison result of vegetable oil by comparing the basis weight of the fiber treatment agent.

As shown in FIG. 9, the backseat 27 may have an outer region R11 extending inward from the outer surface 271 of the backseat 27 and an inner region R12 extending outward from the inner surface 272 of the backseat 27. The outer region R11 and the inner region R12 may be adjacent to each other. The outer region R11 of the present embodiment extends from the skin-facing surface of the center sheet 21C to the non-skin surface side T2, and the inner region R12 is located on the non-skin surface side T2 of the outer region R11 and is not the center sheet 21C. It extends from the skin facing surface to the skin surface side T1. The average fiber diameter of the outer region R11 is smaller than the average fiber diameter of the inner region R12. That is, the outer region R11 is a region having a smaller average fiber diameter than the inner region R12. The outer region R11 has a relatively small average fiber diameter and tends to have a large fiber surface area as compared with the inner region R12. It is possible to secure a surface area to which the vegetable oil can adhere and increase the content of the vegetable oil in the outer region R11. On the other hand, the inner region R12 has a relatively large average fiber diameter as compared with the outer region R11, and the gaps between the fibers tend to be large. The adhesive in contact with the inner region R12 easily enters the gaps between the fibers, and it is easy to secure the adhesive force by the adhesive. The thickness of the inner region R12 may be thicker than the thickness of the outer region R11. By increasing the thickness of the inner region where it is easy to secure voids between fibers, it is easy to hold the adhesive and it is easier to secure the adhesive force by the adhesive.

The average fiber diameter of the outer region R11 may be 1.7 dtex or less, and the average fiber diameter of the inner region R12 may be 3.3 dtex or more. Since the average fiber diameter of the inner region R12 is 3.3 dtex or more and the fiber diameter is relatively large, it is easy to secure voids between the fibers. Further, since the average fiber diameter of the outer region R11 is 1.7 dtex or less and the fiber diameter is relatively small, the voids between the fibers tend to be small. Therefore, it is difficult for the body fluid and the adhesive that have infiltrated into the gap G between the fibers in the inner region R12 to move to the outer region R11. Therefore, the adhesive can be held in the inner region R12 to secure the adhesive force, and the body fluid can be held in the inner region R12 to suppress the rewetting of the absorbent article to the outer surface. In addition, when the back sheet 27 constitutes the outer surface of the absorbent article 1X, when the wearer or the like touches the back sheet 27, the back sheet 27 may be softly deformed or have a smooth touch, or the wearer or the like may have skin. It is easy to have a kind heart. Therefore, in addition to the efficacy of the vegetable oil, the wearer or the like can easily recognize that the absorbent article 1X is gentle on the skin.

The thickness of the inner region R12 may be thicker than the thickness of the outer region R11. By increasing the thickness of the inner region where it is easy to secure the voids between the fibers, it is easy to hold the body fluid drawn inward in the thickness direction, and the pullability of the body fluid can be improved. Preferably, the ratio of the thickness of the inner region R12 to the entire backsheet 27 may be 80% or more. It is easier to secure voids between fibers, and it is possible to further improve the adhesive force and the pulling property of body fluids by the adhesive. The thickness of the inner region R12 and the thickness of the outer region R11 are measured by observing the cross section using a digital microscope VHX-7000 / KEYENCE in the same manner as the method for measuring the average fiber diameter.

The density of the vegetable oil in the outer region R11 may be higher than the density of the vegetable oil in the inner region R12. The outer region R11 of the backsheet 27 is located outside the inner region R12 in the thickness direction T, is close to the outer surface of the absorbent article 1X, and has a high density of vegetable oil. Therefore, when the back sheet 27 is arranged on the outer surface of the absorbent article 1X, when the wearer or the like touches the back sheet 27, the vegetable oil can be transferred to the wearer or the like, and the vegetable oil can be transferred to the wearer or the like. Can be given the effect of. Further, when the back sheet 27 is arranged inside the outer surface of the absorbent article 1X (for example, of the second sheet 23), when the outer surface of the absorbent article 1X is pressed, the absorbent article 1X Vegetable oil easily exudes to the outer surface, and the effect of vegetable oil can be imparted to the wearer and the like. The inner region R12, which has a low density of vegetable oil, constitutes the inner surface of the backsheet 27 and comes into contact with other constituent members (leakage-proof film, core wrap, second sheet, elastic member) located inside the backsheet 27. It is joined to the constituent members of the above via an adhesive, or welded to other constituent members. At this time, since the density of the vegetable oil is relatively low, it is possible to suppress problems such as difficulty in joining the adhesive due to the arrangement of the vegetable oil.

The density of the fibers in the inner region R12 may be lower than the density of the fibers in the outer region R11. Since the density of the fibers in the inner region R12 is lower than the density of the fibers in the outer region R11, it is easy to secure the gap G between the fibers. The adhesive in contact with the inner region R12 easily enters the gaps between the fibers, and it is easy to secure the adhesive force by the adhesive. In addition, it is easy to hold the body fluid drawn into the back sheet 27, and the pulling property of the body fluid can be improved.

An elastic member may be joined to the inner surface (skin facing surface) of the back sheet 27, and the vegetable oil may be provided in a region overlapping the elastic member. Examples of the elastic member include the leg circumference elastic member 67 and the waist circumference elastic member. Since the basis weight of the vegetable oil on the inner surface of the back sheet 27 is low, the bonded state of the elastic member to the back sheet 27 can be maintained. Further, the elastic member is a portion that is in close contact with the body, and the wearer or the like can easily touch the region that overlaps with the elastic member in order to adjust the position of the elastic member and the body portion. By arranging the elastic member in the region overlapping with the elastic member, the wearer or the like can easily come into contact with the vegetable oil in the process of adjusting the position of the elastic member, and the effect of the vegetable oil can be imparted to the wearer or the like.

Recall information 80 reminiscent of vegetable oil may be provided in the oil arrangement region R31. The recall information 80 may include at least one of letters, colors, and designs that can recall vegetable oils. The recall information 80 is information that can be visually or tactilely recognized by the wearing assistant and can recall vegetable oil when the wearing assistant visually recognizes it. The recall information 80 is arranged toward the outer surface of the absorbent article 1X. Since the recall information 80 is arranged so as to face the outer surface of the absorbent article 1X, the wearing assistant can visually recognize the recall information 80 from the outer surface side of the absorbent article 1X or touch the outer surface of the absorbent article 1X. By doing so, you can recall vegetable oil. The presence of vegetable oil can be notified to the wearing assistant by the recall information 80. It is possible to give the wearing assistant the feeling that vegetable oil is mixed. The recall information 80 of the present embodiment is arranged on the non-skin facing surface of the leak-proof sheet 26, and is configured to be visible from the back sheet 27 side. It is preferable that the recall information 80 is visible on the surface provided with the oil arrangement region R31. The wearing assistant can grasp the existence of the vegetable oil by the recall information 80, and can more easily feel the effect of the vegetable oil. Further, in the form in which both the oil-arranged region R31 and the non-arranged region are provided on the back sheet 27, the oil-arranged region R31 may be indicated by the recall information 80. It becomes easier for the wearing assistant to grasp the oil arrangement area R31, and it becomes easier to exert the function of the vegetable oil.

The backsheet 27 may have a non-arranged region not coated with vegetable oil. The non-arranged region may be provided in the target portion 95. Since the vegetable oil is not arranged on the target portion to which the fastening tape 90 adheres, it is possible to suppress a decrease in the engaging force of the fastening tape due to the oil content, and it is possible to maintain the anchored state between the fastening tape and the target portion. Preferably, the non-arranged region may be provided in at least a part of the target portion, but preferably, the non-arranged region may be provided over the entire area of the target portion 95. The non-arranged region is composed of a portion of the fiber 55 in the back sheet 27 including the oil layer 552 having the vegetable oil, and a non-applied region of the vegetable oil in the configuration in which the vegetable oil is applied after the back sheet 27 is molded.

At least a part of the oil arrangement area R31 may be provided on the side flap 48. When the absorbent article 1X is attached to the wearer, the wearing assistant generally has a side that does not abut on the excretion port rather than grasping the core arrangement area (the area where the core is arranged) that abuts on the excretion port. Tends to grab flap 48. The wearing assistant also grabs the side flaps when unfolding the diaper. By providing the oil arrangement area R31 on the side flap, the mounting assistant can easily touch the back seat 27 in the process of mounting operation and can feel the presence of vegetable oil.

The oil arrangement region R31 may be provided only on the back seat 27 of the top sheet 21 and the back seat 27. That is, the vegetable oil does not have to be provided on the top sheet 21. Since the top sheet 21 does not have the vegetable oil oil arrangement region R31, it is possible to impart the effect of the vegetable oil to the wearing assistant while suppressing the stickiness of the vegetable oil to the wearer. Wearing assistants are more likely to be concerned about the ingredients that come into contact with the newborn's skin, and can be particularly preferably used in absorbent articles for newborns. In the modified example, the vegetable oil may also be provided on the top sheet 21. The effect of vegetable oil can be imparted to the wearer.

In the modified example, the back sheet 27 may have a convex portion and a concave portion recessed in the thickness direction T from the convex portion. The convex portions and the concave portions extend in the front-rear direction L, and may be arranged alternately in the width direction W. The convex portion may be a portion where the basis weight of the absorbent material is higher than that of the concave portion, or the convex portion may be a portion where the basis weight of the absorbent material is the same as that of the concave portion but the density is lower than that of the concave portion. The vegetable oil may be placed in each of the convex and concave parts. The vegetable oil in the convex portion easily touches the skin of the wearing assistant, and the vegetable oil in the concave portion is in a recessed position than the convex portion, so that it is difficult to touch the skin of the wearing assistant. By arranging the vegetable oil on the convex portion that easily touches the skin, the vegetable oil can be applied when the surface of the back sheet is patted or the back sheet is slightly touched. Further, by arranging the vegetable oil in the recess that is hard to touch the skin, the vegetable oil can be applied when the absorbent article is gripped or the back sheet is pressed while touching the back sheet. By arranging the vegetable oil in both the concave portion and the convex portion in this way, the wearing assistant can touch the vegetable oil in various situations and can touch the vegetable oil step by step, and the effect of the vegetable oil can be maintained for a long period of time. Obtainable.

(4) Absorbent article according to the third embodiment Next, the absorbent article according to the third embodiment will be described with reference to the drawings. Conventionally (for example, the above-mentioned Patent Document 1), an absorbent article containing a vegetable oil has been disclosed. Vegetable oils are selected as the oil composition contained in the topsheet coating. In Patent Document 1, in addition to olive oil, almond oil, sunflower oil, and rapeseed oil are mentioned as vegetable oils. In Patent Document 1, the functional sheet containing vegetable oil is bonded to other constituent members that come into contact with the functional sheet via an adhesive or the like. When vegetable oil is attached to the functional sheet, the adhesive may come into contact with the vegetable oil of the functional sheet, and it may be difficult to secure the adhesive force between the functional sheet and other constituent members. The absorbent article according to the second embodiment is made to solve the above-mentioned problems. Provided is an absorbent article having a functional sheet to which vegetable oil is applied, wherein it is easy to secure an adhesive force between the functional sheet and other constituent members.

FIG. 10 is a schematic plan view of the absorbent article 1Y according to the third embodiment as viewed from the skin surface side in the unfolded state. FIG. 11 is a schematic cross-sectional view taken along the line GG shown in FIG. FIG. 12 is an enlarged cross-sectional view of the H portion shown in FIG. In the schematic cross-sectional view, for convenience of explanation, the members may be separated in the thickness direction T, but in an actual product, they are in contact with the thickness direction T.

As shown in FIG. 12, the absorbent article 1Y may have at least a sheet pressing portion 28 in which the top sheet 21 is compressed in the thickness direction. A plurality of sheet pressing portions 28 may be provided at intervals in a plan view. The sheet pressing portions 28 of the present embodiment are point-shaped and are arranged at intervals in the front-rear direction L and at intervals in the width direction W. The sheet pressing portion 28 may be configured to be visible from the skin surface side T1 of the absorbent article 1. In the present embodiment, the center sheet 21C constituting the top sheet 21 is provided with the sheet pressing portion 28, and the side sheet 21S is not provided with the sheet pressing portion 28. The sheet pressing portion 28 may be provided on the functional sheet 45 described later.

The absorbent article 1X has a non-skin side sheet 25 located on the non-skin side T2 of the absorption core 31. The non-skin side sheet 25 covers the absorbent core 31 and is arranged throughout the disposable diaper. The non-skin side sheet 25 of this embodiment includes a leak-proof sheet 26 and a back sheet 27. The leak-proof sheet 26 is a liquid-impermeable sheet, and a breathable resin film is bonded to a polyethylene sheet, a laminated non-woven fabric mainly made of polypropylene or the like, a breathable resin film, a spunbond, or a non-woven fabric such as spunlace. It is possible to use a sheet or the like. The back sheet 27 may be provided on the non-skin surface side T2 of the leak-proof sheet 26. The backsheet 27 may be made of a liquid permeable non-woven fabric. The length of the leak-proof sheet 26 in the width direction W is shorter than the length of the back sheet 27 in the width direction W, and the length of the leak-proof sheet 26 in the front-rear direction L is larger than the length of the back sheet 27 in the front-rear direction L. It can be short.

Fastening tape 90 is provided on the absorbent article 1Y. The fastening tape 90 is provided in the rear waist circumference region S2. The target portion 95 is provided in the front waist circumference region S1. Therefore, the rear girth area S2 of the present embodiment constitutes the first girth area of the first girth member and the second girth member covering the wearer's girth, and the front girth area S1 constitutes the second girth area. To do. The fastening tape 90 has a base portion 92 and a locking portion 93. At least a part of the base portion 92 is joined between the skin side sheet 20 and the non-skin side sheet 25, and extends from the skin side sheet 20 and the non-skin side sheet 25 to the outside in the width direction W. The locking portion 93 is provided on the base portion 92 and is detachably fastened to the target portion 95 of the front waist circumference region S1. The fastening tape 90 extends along the width direction W in the rear waist circumference region S2 and is fastened to the target portion 95 to hold the absorbent article 1Y on the wearer's body. The target portion 95 is arranged in the front waist circumference region S1 and is configured so that the fastening tape 90 is fixed to each other. In the modified example, the absorbent article 1Y may be configured such that the fastening tape 90 is fixed to the non-skin facing surface of the non-skin side sheet 25 without providing the target portion.

The absorbent article 1Y has a functional sheet 45. The functional sheet 45 has an oil placement region R31 in which the vegetable oil is placed. The oil arrangement region R31 is a region in which vegetable oil is arranged in a plan view. The vegetable oil may be any oil that can impart a suitable effect to the wearer or the like, and examples thereof include olive oil, jojoba oil, rice oil, shea butter, tea oil, aloe oil, argan oil, and peach oil. Examples of olive oil include extra virgin olive oil, virgin olive oil, ordinary virgin olive oil, lampante virgin olive oil, refined olive oil, pure olive oil, refined olive pommers oil, and olive pommers oil. By arranging the olive oil, the effect of the olive oil can be imparted to the wearer and the like. The effects of olive oil can be, for example, moisturizing the skin, moisturizing the skin, keeping the skin smooth, and imparting aroma. Olive oil may have an acid value of 6.6 mg / g or less and a peroxide value of 30 meq / mg or less.

The functional sheet 45 is a sheet that is arranged outside the absorption core 31 in the thickness direction T and is coated with vegetable oil. The functional sheet 45 constitutes at least one of the sheets located outside the absorption core 31 in the thickness direction T. The functional sheet 45 of the present embodiment constitutes a center sheet 21C as a top sheet 21. In the modified example, the functional seat 45 may constitute a second seat 23, a side seat 21S, a back seat 27, and a core wrap. Preferably, the functional sheet 45 may be placed on the outer surface of the absorbent article. The outer surface of the absorbent article includes a skin-facing surface 1T and a non-skin-facing surface 1B. The skin-facing surface 1T of the absorbent article 1Y is composed of a skin-facing surface of the top sheet 21 including a pair of side seats 21S and a skin-facing surface of the center sheet 21C located between the side sheets 21S. ing. The non-skin facing surface 1B of the absorbent article 1Y is composed of the non-skin facing surface of the back sheet 27. Since the functional sheet 45 is arranged on the outer surface of the absorbent article, the wearer or the like can easily come into direct contact with the functional sheet 45, and the effect of the vegetable oil can be imparted to the wearer or the like. More specifically, the top sheet 21 is a sheet that comes into contact with the wearer's skin. Since the vegetable oil is arranged on the skin-facing surface of the top sheet, the vegetable oil easily comes into contact with the wearer's skin. Further, the back sheet 27 is a place where a wearing assistant such as a mother can easily touch the back sheet 27 when taking it out. Since the vegetable oil is arranged on the non-skin facing surface of the back sheet 27, the vegetable oil easily comes into contact with the skin of a wearing assistant such as a mother. Vegetable oils can protect the skin's moisture and keep it smooth. In particular, when the back sheet 27 is in the form of a non-woven fabric, the skin of the wearing assistant can be protected even when the back sheet 27 is repeatedly touched with the non-woven fabric. The side sheet 21S constitutes a side flap extending outward in the width direction from the absorption core 31. Wearing assistants generally have side flaps that do not abut on the cloaca when mounting the absorbent article on the wearer, rather than grabbing the cloaca area (the area where the core is located) that abuts the cloaca. Tends to grab. The wearing assistant also grabs the side flaps when unfolding the diaper. By providing the arrangement area on the side flap, the mounting assistant can easily touch the side seat 21S and the back seat 27 in the process of mounting operation, and can feel the presence of vegetable oil.

The center sheet 21C constituting the functional sheet 45 may be composed of a non-woven fabric having fibers. The fiber 55 constituting the center sheet 21C of the present embodiment has a fiber body 551 and an oil layer 552. The surface of the fiber body 551 is covered with an oil layer 552 made of a hydrophilic fiber treatment agent. Vegetable oil is present in the oil layer 552. In this way, the oil layer 552 that covers the fiber body 551 imparts vegetable oil to the constituent members. Therefore, it is easy to uniformly distribute the vegetable oil over the entire center sheet 21C. Vegetable oil can be arranged not only on the skin-facing surface and the non-skin-facing surface of the center sheet 21C, but also on the inner portion in the thickness direction. When the skin of the wearer or the like touches the fibers of the functional sheet 45, the oil layer covering the surface of the fibers constituting the portion touched by the wearer or the like can be easily transferred to the wearer or the like. Further, since the oil layer has hydrophilicity, body fluids such as sweat easily move to the skin surface side. For example, even when the hands of the wearer or the like are moist due to sweat or the like, the center sheet 21C can draw in the moisture and improve the feel of the surface of the back seat 27. The gap G between the fibers 55 constitutes a non-arranged region in which the fiber main body 551 and the oil layer 552 are not arranged and the vegetable oil is not arranged. In FIG. 11, since the non-arranged region is smaller than the oil-arranged region R31, the region where the backsheet 27 is arranged is shown as the oil-arranged region R31 for convenience. Further, in the modified example, the functional sheet 45 may be obtained by applying the vegetable oil or the fiber treatment agent containing the vegetable oil to the constituent members after molding the constituent members such as the center sheet 21C.

The vegetable oil may be arranged on the skin-facing surface of the center sheet 21C and the non-skin-facing surface of the center sheet 21C, respectively. Further, the center sheet 21C may have a penetrating region in which vegetable oil is not applied over the entire area of the center sheet 21C in the thickness direction T. The penetration region is, for example, a region where the gap G between the fibers is continuous in the thickness direction T. In the penetrating region, the vegetable oil is not arranged over the entire thickness direction T of the center sheet 21C, and the vegetable oil is not arranged over the entire plane of the back sheet 27. Compared with the configuration in which the vegetable oil is arranged over the entire plane of the center sheet 21C, it is difficult for the vegetable oil to keep in contact with the skin at all times, and the stickiness due to the vegetable oil can be suppressed. The penetration region is composed of a portion of the center sheet 21C including the oil layer 552 containing the vegetable oil in which the portions between the fibers 55 are continuous in the thickness direction, and a non-applied region of the vegetable oil in the configuration in which the vegetable oil is applied after the back sheet 27 is formed. ..

The basis weight of the vegetable oil on the outer surface 451 of the functional sheet 45 is higher than the basis weight of the vegetable oil on the inner surface 452 of the functional sheet 45. When the functional sheet 45 is arranged on the outer surface of the absorbent article 1Y, when the wearer or the like touches the functional sheet 45, the vegetable oil can be transferred to the wearer or the like, and the vegetable oil can be transferred to the wearer or the like. Can be given the effect of. Further, when the functional sheet 45 is arranged inside the outer surface of the absorbent article 1Y (for example, of the second sheet 23), when the outer surface of the absorbent article 1Y is pressed, the absorbent article 1Y Vegetable oil easily exudes to the outer surface of the body, and the effect of vegetable oil can be imparted to the wearer and the like. The inner surface of the functional sheet 45 is joined to other constituent members located inside the functional sheet 45 via an adhesive, or is welded to the other constituent members. At this time, since the basis weight of the vegetable oil on the inner surface 452 of the functional sheet 45 is relatively low, it is possible to suppress problems such as difficulty in joining the adhesive due to the arrangement of the vegetable oil.

The basis weight of vegetable oil on the outer surface of the functional sheet and the basis weight of vegetable oil on the inner surface of the functional sheet can be compared by the following methods. Prepare two sheets of filter paper and impregnate each with hexane. One filter paper is applied to the outer surface of the functional sheet, the other filter paper is applied to the inner surface of the functional sheet, and the vegetable oil of the functional sheet is transferred to each of the two filter papers. The basis weight of the vegetable oil transferred to the filter paper is compared with the basis weight of the vegetable oil on the outer surface of the functional sheet and the basis weight of the vegetable oil on the inner surface of the functional sheet. The basis weight of the vegetable oil transferred to the filter paper can be measured by a well-known method, and for example, a high performance liquid chromatography (HPLC) method can be used. When the fiber treatment agent contains vegetable oil substantially uniformly, the comparison result can be replaced with the comparison result of vegetable oil by comparing the basis weight of the fiber treatment agent.

As shown in FIG. 12, the functional sheet 45 may have an outer region R11 extending inward from the outer surface 451 of the functional sheet 45 and an inner region R12 extending outward from the inner surface 452 of the functional sheet 45. .. The outer region R11 and the inner region R12 may be adjacent to each other. The outer region R11 of the present embodiment extends from the skin-facing surface of the center sheet 21C to the non-skin surface side T2, and the inner region R12 is located on the non-skin surface side T2 of the outer region R11 and is not the center sheet 21C. It extends from the skin facing surface to the skin surface side T1. The average fiber diameter of the outer region R11 is smaller than the average fiber diameter of the inner region R12. That is, the outer region R11 is a region having a smaller average fiber diameter than the inner region R12. The outer region R11 has a relatively small average fiber diameter and tends to have a large fiber surface area as compared with the inner region R12. It is possible to secure a surface area to which the vegetable oil can adhere and increase the content of the vegetable oil in the outer region R11. On the other hand, the inner region R12 has a relatively large average fiber diameter as compared with the outer region R11, and the gaps between the fibers tend to be large. The adhesive in contact with the inner region R12 easily enters the gaps between the fibers, and it is easy to secure the adhesive force by the adhesive. The thickness of the inner region R12 may be thicker than the thickness of the outer region R11. By increasing the thickness of the inner region where it is easy to secure voids between fibers, it is easy to hold the adhesive and it is easier to secure the adhesive force by the adhesive.

The average fiber diameter of the outer region R11 may be 1.7 dtex or less, and the average fiber diameter of the inner region R12 may be 3.3 dtex or more. Since the average fiber diameter of the inner region R12 is 3.3 dtex or more and the fiber diameter is relatively large, it is easy to secure voids between the fibers. Further, since the average fiber diameter of the outer region R11 is 1.7 dtex or less and the fiber diameter is relatively small, the voids between the fibers tend to be small. Therefore, it is difficult for the body fluid and the adhesive that have infiltrated into the gap G between the fibers in the inner region R12 to move to the outer region R11. Therefore, the adhesive can be held in the inner region R12 to secure the adhesive force, and the body fluid can be held in the inner region R12 to suppress the rewetting of the absorbent article to the outer surface. In addition, when the functional sheet 45 constitutes the outer surface of the absorbent article 1Y, when the wearer or the like touches the functional sheet 45, it is softly deformed or has a smooth touch, or the wearer or the like. Is easy to have a skin-friendly feeling. Therefore, in addition to the efficacy of the vegetable oil, the wearer or the like can easily recognize that the absorbent article 1Y is gentle on the skin.

The thickness of the inner region R12 may be thicker than the thickness of the outer region R11. By increasing the thickness of the inner region where it is easy to secure the voids between the fibers, it is easy to hold the body fluid drawn inward in the thickness direction, and the pullability of the body fluid can be improved. Preferably, the ratio of the thickness of the inner region R12 to the entire functional sheet 45 may be 80% or more. It is easier to secure voids between fibers, and it is possible to further improve the adhesive force and the pulling property of body fluids by the adhesive. The thickness of the inner region R12 and the thickness of the outer region R11 are measured by observing the cross section using a digital microscope VHX-7000 / KEYENCE in the same manner as the method for measuring the average fiber diameter.

The density of the vegetable oil in the outer region R11 may be higher than the density of the vegetable oil in the inner region R12. The outer region R11 of the functional sheet 45 is located outside the inner region R12 in the thickness direction T, is close to the outer surface of the absorbent article 1Y, and has a high density of vegetable oil. Therefore, when the functional sheet 45 is arranged on the outer surface of the absorbent article 1Y, when the wearer or the like touches the functional sheet 45, the vegetable oil can be transferred to the wearer or the like, and the vegetable oil can be transferred to the wearer or the like. The effect of vegetable oil can be imparted. Further, when the functional sheet 45 is arranged inside the outer surface of the absorbent article 1Y (for example, of the second sheet 23), when the outer surface of the absorbent article 1Y is pressed, the absorbent article 1Y Vegetable oil easily exudes to the outer surface of the body, and the effect of vegetable oil can be imparted to the wearer and the like. The inner region R12 having a low density of vegetable oil constitutes the inner surface of the functional sheet 45 and comes into contact with other constituent members (leakage-proof film, core wrap, second sheet, elastic member) located inside the functional sheet 45. , It is joined to other components via an adhesive, or it is welded to other components. At this time, since the density of the vegetable oil is relatively low, it is possible to suppress problems such as difficulty in joining the adhesive due to the arrangement of the vegetable oil.

The density of the fibers in the inner region R12 may be lower than the density of the fibers in the outer region R11. Since the density of the fibers in the inner region R12 is lower than the density of the fibers in the outer region R11, it is easy to secure the gap G between the fibers. The adhesive in contact with the inner region R12 easily enters the gaps between the fibers, and it is easy to secure the adhesive force by the adhesive. In addition, it is easy to hold the body fluid drawn into the functional sheet 45, and the pulling property of the body fluid can be improved.

An elastic member may be joined to the inner surface (inner surface in the thickness direction) of the functional sheet 45, and the vegetable oil may be provided in a region overlapping the elastic member. Examples of the elastic member include the leg circumference elastic member 67 and the waist circumference elastic member. Since the basis weight of the vegetable oil on the inner surface of the functional sheet 45 is low, the bonded state of the elastic member with respect to the functional sheet 45 can be maintained. Further, the elastic member is a portion that is in close contact with the body, and the wearer or the like can easily touch the region that overlaps with the elastic member in order to adjust the position of the elastic member and the body portion. By arranging the elastic member in the region overlapping with the elastic member, the wearer or the like can easily come into contact with the vegetable oil in the process of adjusting the position of the elastic member, and the effect of the vegetable oil can be imparted to the wearer or the like.

The functional sheet 45 may be provided with at least a sheet pressing portion 28 in which the functional sheet 45 is compressed in the thickness direction. At least a portion of the vegetable oil may be provided in the sheet press. When forming the sheet squeezed portion, generally, the convex portion corresponding to the sheet squeezed portion is pressed against the functional sheet to squeeze the functional sheet. At this time, the convex portion may be in close contact with the functional sheet and may be difficult to separate from the functional sheet. However, since the vegetable oil is arranged at the position where the sheet pressing portion is formed, the convex portion pressed against the sheet pressing portion is easily separated from the sheet pressing portion. Therefore, the convex portion and the sheet squeezed portion can be smoothly separated from each other without providing a surface treatment on the convex portion to facilitate the separation between the convex portion and the sheet squeezed portion, and the manufacturing efficiency can be improved.

Although the present invention has been described in detail using the above-described embodiments, it is clear to those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented as modifications and modifications without departing from the spirit and scope of the present invention, which is determined by the description of the claims. Therefore, the description of the present specification is for the purpose of exemplification and does not have any limiting meaning to the present invention.

The entire contents of Japanese Patent Application No. 2019-239286, Japanese Patent Application No. 2019-238973 and Japanese Patent Application No. 2019-239001 filed on December 27, 2019 can be found by reference. Incorporated into the specification.

According to the present invention, it is possible to provide an absorbent article capable of imparting the effect of olive oil to the user while suppressing an adverse effect on the skin.

1: Absorbent article, 20: Skin side sheet, 21: Top sheet (functional sheet), 21C: Center sheet, 21S: Side sheet, 211: Convex, 212: Concave, 23: Second sheet, 25: Non-skin Side sheet, 26: back sheet, 27: exterior sheet, 28: sheet pressing part, 31: absorption core, 48: side flap, 45: functional sheet, 451: outer surface of functional sheet, 452: inner surface of functional sheet , 70: Indicator, 90: Fastening tape, 93: Locking part, 95: Target part, S1: Front waist area (second waist area), S2: Rear waist area (first waist area), S3: Inseam area, T: Thickness direction, T1: Skin surface side, T2: Non-skin surface side, L: Front-back direction, W: Width direction, R11: Outer area, R12: Inner area, R31: Oil arrangement area

Claims

Absorption core and
It has a top sheet, which is arranged on the skin surface side of the absorption core and comes into contact with the wearer's skin.
Olive oil having an acid value of 6.6 mg / g or less and a peroxide value of 30 meq / mg or less is arranged on the top sheet.
An absorbent article in which at least a portion of the olive oil is provided on the skin-facing surface of the top sheet.
The absorbent article according to claim 1, wherein the olive oil is provided on each of the skin-facing surface of the top sheet and the non-skin-facing surface of the top sheet.
The absorbent article according to claim 1 or 2, wherein the top sheet has a non-arranged region to which the olive oil is not applied over the entire area in the thickness direction of the top sheet.
It has at least a sheet pressing portion in which the top sheet is compressed in the thickness direction.
The absorbent article according to any one of claims 1 to 3, wherein at least a part of the olive oil is provided in the sheet pressing portion.
It has a sheet pressing portion in which the top sheet is compressed at least in the thickness direction, and has a sheet pressing portion.
The top sheet has a convex portion and a concave portion recessed in the thickness direction from the convex portion.
The absorbent article according to any one of claims 1 to 4, wherein at least a part of the sheet pressing portion is provided in the recess.
It has a sheet pressing portion in which the top sheet is compressed at least in the thickness direction, and has a sheet pressing portion.
The top sheet has a convex portion and a concave portion recessed in the thickness direction from the convex portion.
The absorbent article according to any one of claims 1 to 4, wherein the olive oil is arranged in each of the convex portion and the concave portion.
The absorbent article according to any one of claims 1 to 6, wherein the basis weight of the olive oil on the skin-facing surface of the top sheet is higher than the basis weight of the olive oil on the non-skin-facing surface of the top sheet.
The absorbent article according to claim 7, wherein an elastic member is joined to the non-skin facing surface of the top sheet.
The absorbent article according to any one of claims 1 to 8, wherein the acid value of the olive oil is 2.0 mg / g or less.
The absorbent article according to any one of claims 1 to 9, wherein the peroxide value of the olive oil is 20 meq / mg or less.
Absorption core and
It has a back sheet which is arranged on the non-skin surface side of the absorbent core and constitutes the outer surface of the absorbent article.
An absorbent article in which an oil arrangement region on which vegetable oil is arranged is provided on the non-skin facing surface of the back sheet.
The non-woven fabric having the back sheet is provided.
The fiber has a fiber body and an oil layer made of a fiber treatment agent that covers the surface of the fiber body and has hydrophilicity.
The absorbent article according to claim 11, wherein the vegetable oil is contained in the oil layer.
The first waistline member and the second waistline member that cover the wearer's waistline,
The fastening tape arranged on the first waist circumference member and
It has a target portion that is arranged on the second waist circumference member and to which the fastening tape is fastened.
The backsheet has a non-arranged region that is not coated with the vegetable oil.
The absorbent article according to claim 11 or 12, wherein the non-arranged region is provided in the target portion.
The absorbent article according to any one of claims 11 to 13, wherein the back sheet has a penetrating region to which the vegetable oil is not applied over the entire area in the thickness direction of the back sheet.
It has side flaps that extend outward in the width direction from the absorption core.
The absorbent article according to any one of claims 11 to 14, wherein at least a part of the oil arrangement region is provided on the side flap.
The absorbent article according to any one of claims 11 to 15, wherein the basis weight of the vegetable oil on the non-skin facing surface of the back sheet is higher than the basis weight of the vegetable oil on the skin facing surface of the back sheet.
An elastic member is joined to the skin-facing surface of the back sheet.
The absorbent article according to claim 16, wherein the oil arrangement region is provided in a region overlapping the elastic member.
It has a top sheet that is located closer to the skin surface than the absorbent core and comes into contact with the wearer's skin.
The absorbent article according to any one of claims 11 to 17, wherein the oil arrangement region is provided only on the back sheet of the top sheet and the back sheet.
Absorption core and
It has a functional sheet that is arranged outside the absorption core in the thickness direction and is coated with vegetable oil.
An absorbent article in which the basis weight of the vegetable oil on the outer surface of the functional sheet in the thickness direction is higher than the basis weight of the vegetable oil on the inner surface of the functional sheet in the thickness direction.
An elastic member is joined to the inner surface of the functional sheet.
The absorbent article according to claim 19, wherein the vegetable oil is provided in a region overlapping the elastic member.
The functional sheet is a non-woven fabric having fibers and is
The functional sheet has an outer region extending inward from the outer surface of the functional sheet and an inner region extending outward from the inner surface of the functional sheet.
The absorbent article according to claim 19, wherein the average fiber diameter of the outer region is smaller than the average fiber diameter of the inner region.
The absorbent article according to claim 21, wherein the thickness of the inner region is thicker than the thickness of the outer region.
The average fiber diameter of the outer region is 1.7 dtex or less.
The absorbent article according to claim 21 or 22, wherein the average fiber diameter of the inner region is 3.3 dtex or more.
The absorbent article according to any one of claims 21 to 23, wherein the density of the vegetable oil in the outer region is higher than the density of the vegetable oil in the inner region.
The functional sheet is arranged on the outer surface of the absorbent article.
The fiber has a fiber body and an oil layer made of a fiber treatment agent that covers the surface of the fiber body and has hydrophilicity.
The absorbent article according to any one of claims 21 to 24, wherein the vegetable oil is contained in the oil layer.
The absorbent article according to any one of claims 21 to 25, wherein the density of the fibers in the inner region is lower than the density of the fibers in the outer region.
It has at least a sheet pressing portion in which the functional sheet is compressed in the thickness direction.
The absorbent article according to any one of claims 21 to 26, wherein at least a part of the vegetable oil is provided in the sheet pressing portion.
The absorbent article according to any one of claims 12 to 27, wherein the vegetable oil is a vegetable oil having an oleic acid content of 55% or more and 83% or less.