JP2021106761A - Absorbent article - Google Patents

Abstract

To provide an absorbent article capable of imparting to a user efficacy of olive oil while suppressing adverse effects on the skin.SOLUTION: An absorbent article (1) has an absorbent core (31) and a top sheet (21) that is arranged closer to the skin surface side than to the absorbent core and in contact with the skin of a wearer. On the top sheet, olive oil which has acid value 6.6 mg/g or below and peroxide value 30 meq/mg or below is placed. At least a part of the olive oil is provided on a skin facing surface of the top sheet.SELECTED DRAWING: Figure 1

Description

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 oils such as olive oil change or deteriorate when they come into contact with 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 an 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.

FIG. 1 is a plan view of the absorbent article according to the 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 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 1. 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.

(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 undeteriorated 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 topsheet may have a non-arranged region where the olive oil is not applied over the entire area of the topsheet 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. In addition, 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.

(2) Absorbent article according to the embodiment The absorbent article according to the 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 diaper 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 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 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 anterior-posterior 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 a 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 with respect to the absorbent 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 backsheet 26.

A fastening tape 90 is provided in the rear waist circumference region 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 3.5 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 surrounding 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 olive oil is arranged, the effect of 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 a scent.

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, the olive oil can be arranged on substantially the entire surface of the fiber body, and the 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 portion of the olive oil is located on the skin-facing surface of the topsheet 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.

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 the deterioration of olive oil can be suppressed, the deterioration of color and scent is suppressed, the wearer does not easily get a sense of discomfort such as scent, and the user 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.

The 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 portion of the olive oil may be provided in the sheet squeezing section 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 the voids between the 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 the fiber diameters of 8 or more of the 10 cut out fiber diameters are different.

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 pulling property 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 in 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 described. 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 Evaluation 3, it was determined 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 Evaluation 4, it was determined 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.

In 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, one of Example 3 and Example 4 having a deteriorated olive oil scent was selected. According to Evaluation 5, it was determined that Example 3 did not have the scent of olive oil deteriorated as compared with Example 4. For evaluation 6, the one with the scent of deteriorated olive oil was selected from Example 3 and Example 5. 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 Evaluation 7, it was determined 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.

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 invention as defined by 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.

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

1: Absorbent article, 20: Skin side sheet, 21: Top sheet, 21C: Center sheet, 21S: Side sheet, 211: Convex part, 212: Concave part, 23: Second sheet, 25: Non-skin side sheet, 26: Back seat, 27: Exterior seat, 28: Seat squeezing part, 31: Absorption core, 70: Indicator, 90: Fastening tape, 93: Locking part, 95: Target part, S1: Front waist circumference area, S2: Rear waist circumference 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

Claims (10)

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.

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