JP6706940B2 - Absorbent article - Google Patents

Description

The present invention relates to absorbent articles containing a skin care agent.

When an absorbent article such as a disposable diaper, a sanitary napkin, a panty liner (decorative sheet), or an incontinence pad is worn, skin irritation may occur due to stuffiness or the like. In order to prevent skin troubles caused by wearing such absorbent articles, it has been conventionally practiced to impart a skin care effect to the absorbent articles.

For example, in Patent Documents 1 to 3, the skin care agent is provided in a layer closer to the wearer's skin than the skin contact surface or the absorber in the absorbent article, which may contact the wearer's skin, while folding back in one direction in a plan view. It is described to apply in a continuous line pattern extending in a direction orthogonal to one direction. As a typical example of such a pattern, as shown in FIG. 11, there is a spiral pattern having a continuous line 90 extending in the vertical direction X while being folded back in the horizontal direction Y. In the spiral pattern shown in FIG. 11, three continuous lines 90 are intermittently arranged in the lateral direction Y, and each continuous line 90 has a plurality of folded portions 91 (marked with a circle in FIG. 11) on both sides in the lateral direction Y. Part). In each continuous line 90, the positions of the plurality of folded-back portions 91 in the lateral direction Y are aligned on both sides in the lateral direction Y, and therefore, the folded-back portion 91 on one side of the lateral direction Y and the folded-back portion 91 on the other side thereof. The length between is uniform. In addition, in Patent Document 2, as a spiral pattern different from the continuous line 90, the lateral positions of the plurality of folded portions are uneven on both sides in the lateral direction, that is, the folded portion on one side in the width direction and the folded portion on the other side in the width direction. It is described that the length between the parts is not uniform (see FIG. 1c of Patent Document 2).

Japanese Patent Publication No. 2006-519320 Japanese Patent Publication No. 2007-528742 Special table 2014-506153 gazette

The adhesion pattern of the skin care agent in the absorbent article can greatly affect not only the skin care effect of the skin care agent but also various characteristics of the absorbent article itself. For example, when a large amount of a skin care agent is attached for the purpose of improving the skin care effect, the adhesion portion of the large amount of the skin care agent generally has high rigidity, which may reduce flexibility and stretchability. Hardening of the part increases the irritation to the skin of the wearer of the absorbent article, and the use of the skin care agent may rather cause skin trouble.

Further, in the typical spiral pattern as shown in FIG. 11, the non-adhesive portion of the skin care agent is continuously present along the entire length of the continuous line 90 between the continuous lines 90 adjacent to each other in the lateral direction Y. There may be unevenness in contact of the skin care agent with the wearer's skin, and the skin care effect may not be sufficiently obtained. Further, in consideration of this point, when the interval between the continuous lines 90, 90 is narrowed or eliminated, a large difference occurs in the amount of skin care agent adhered between the folded-back portion 91 and other portions, and as a result, depending on the site of the absorbent article. There may be a difference in the skin care effect, and the expression of the skin care effect may become unstable.

An object of the present invention is to provide an absorbent article capable of stably exhibiting the skin care effect of the skin care agent while maintaining various properties such as flexibility which may be impaired by the adhesion of the skin care agent. ..

The present invention has a crotch portion arranged in the crotch part of the wearer, has a longitudinal direction extending from the wearer's abdomen side to the back side through the crotch part, and a lateral direction orthogonal to the longitudinal direction. Is an absorbent article in which a skin care agent that is in contact with the skin is adhered in a predetermined pattern, and the skin care agent forms a continuous line extending in the longitudinal direction while being folded back in the horizontal direction in a plan view, There are a plurality of folded portions on each of the lateral direction one side and the other side of the line, and in each of the lateral direction one side and the other side, the lateral direction positions of the plurality of folded portions are uneven, and the skin contact surface is A plurality of continuous lines having different average lateral lengths are arranged side by side in the lateral direction to have a quadrangular skin care agent placement area in a plan view, and the skin care agent placement area is located at the crotch portion of the skin. The lateral length of any portion in the skin care agent placement region that overlaps the lateral center of the contact surface is equal to the lateral length of the portion in the same position in the longitudinal direction as the arbitrary portion of the skin contact surface. It is intended to provide an absorbent article having a content of 30% or more.

According to the present invention, there is provided an absorbent article capable of stably exhibiting the skin care effect of the skin care agent while maintaining various properties such as flexibility which may be impaired by the adhesion of the skin care agent.

FIG. 1 is a plan view schematically showing a skin contact surface of an example of a sanitary napkin as an embodiment of the absorbent article of the present invention. FIG. 2 is a cross-sectional view schematically showing a cross section taken along the line I-I of FIG. 1. FIG. 3 is an explanatory diagram of a method for determining a skin care agent placement region according to the present invention. FIG. 4 is a plan view of an example of a skin care agent adhesion pattern according to the present invention. FIG. 5 is a plan view of another example of the adhesion pattern of the skin care agent according to the present invention. 6(a) and 6(b) are plan views of still another example of the adhesion pattern of the skin care agent according to the present invention. FIG. 7A and FIG. 7B are plan views of still another example of the adhesion pattern of the skin care agent according to the present invention. FIG. 8 is a plan view of still another example of the adhesion pattern of the skin care agent according to the present invention. FIG. 9 is an enlarged plan view showing a part of the continuous line shown in FIG. 10A to 10D are plan views of still another example of the adhesion pattern of the skin care agent according to the present invention. FIG. 11 is a plan view of an example of a conventional skin care agent adhesion pattern. FIG. 12 is a plan view of another example of a conventional skin care agent adhesion pattern.

The present invention will be described below based on its preferred embodiments with reference to the drawings. 1 and 2 show a sanitary napkin 1 which is an embodiment of the absorbent article of the present invention. The napkin 1 has a crotch part 1M arranged in the crotch part of the wearer, and has a vertical direction X extending from the abdominal side of the wearer to the back side through the crotch part and a lateral direction Y orthogonal thereto.

The napkin 1 has a shape that is long in the vertical direction X in a plan view as shown in FIG. 1, the longitudinal direction thereof coincides with the longitudinal direction X, and the width direction orthogonal to the longitudinal direction coincides with the lateral direction Y. .. The napkin 1 includes a front portion 1F disposed on the wearer's abdominal side than the crotch portion 1M when worn and a rear portion 1R disposed on the wearer's back side than the crotch portion 1M when worn in the longitudinal direction X. It has a shape constricted inward in the horizontal direction Y at the central portion in the vertical direction X, that is, the crotch portion 1M. The front portion 1F, the crotch portion 1M, and the rear portion 1R correspond to respective portions when the napkin 1 is divided into three equal parts in the vertical direction X. The crotch portion 1M includes a not-shown excretion point which is arranged to face an excretory portion such as a vaginal opening of the wearer when the napkin 1 is worn. The excretion point is usually located at or near the center of the napkin 1 in the vertical direction X.

The napkin 1 includes a liquid-permeable topsheet 2 that forms a skin-contacting surface that may come into contact with the wearer's skin during wearing, and a liquid-impermeable surface sheet 2 that forms a non-skin-contacting surface that does not come into contact with the wearer's skin during wearing. It comprises a liquid-permeability-permeable or water-repellent back sheet 3 and an absorber 4 interposed between both sheets 2 and 3, which are integrally formed by a known joining means such as an adhesive. .. The topsheet 2 and the backsheet 3 each extend from the peripheral edge of the absorbent body 4, and are joined to each other at their ends by a known joining means such as an adhesive or heat sealing to form the end seal portion 5. Is formed. On the non-skin contact surface of the napkin 1, that is, on the non-skin facing surface of the back sheet 3, an adhesive portion (not shown) for fixing the napkin 1 to clothes such as shorts may be arranged. This adhesive portion can be provided, for example, by applying an adhesive to a predetermined portion on the outer surface of the back sheet 3, and before use, it can be covered with a release sheet (not shown) made of a film, a non-woven fabric, paper or the like.

The skin-facing surface of the topsheet 2 is a skin-contacting surface that may come into contact with the wearer's skin when worn, and a skin-care agent-adhering surface. As the topsheet 2, a liquid-permeable sheet material conventionally used in this type of absorbent article can be used without particular limitation. For example, a nonwoven fabric manufactured by the card method, an air-through nonwoven fabric, a spunbonded nonwoven fabric, Various non-woven fabrics such as melt-blown non-woven fabric, spunlace non-woven fabric and needle punched non-woven fabric; The topsheet 2 is not limited to a single-layer structure sheet as shown in FIG. 2, and may be a multi-layer structure sheet.

In the napkin 1 shown in FIGS. 1 and 2, it is only the topsheet 2 that can form a skin-contacting surface that can come into contact with the wearer's skin when worn, for example, the absorber in plan view of the topsheet 2 When a leak-proof member (not shown) also called a side sheet or the like is arranged on both sides of the portion overlapping with 4 in the vertical direction X, the leak-proof member forms a skin contact surface together with the topsheet 2. You can The present invention includes a form including such a leakproof member, and a skin care agent may be attached to the leakproof member.

As the back sheet 3 and the absorbent body 4, various materials conventionally used in this type of absorbent article can be used without particular limitation. A resin film, a laminate of a resin film and a non-woven fabric, or the like can be used as the back sheet 3, and the same material as the back sheet 3 can be used as the leak-proof member (side sheet). The backsheet 3 includes, for example, a liquid impermeable film sheet alone and a non-skin-facing surface of the film sheet, that is, an outer sheet laminated on the outer surface side. Is, for example, a nonwoven fabric. As the absorber 4, an aggregate of absorbent materials can be used, and this aggregate may be covered with a liquid-permeable sheet such as paper or nonwoven fabric. As the absorbent material, wood pulp, hydrophilic fibers such as synthetic fiber treated with a hydrophilizing agent, water-absorbent polymer particles, etc. can be used.

In the present specification, the “skin-facing surface” is a surface of a constituent member (for example, a surface sheet) of an absorbent article, which is directed toward the wearer's skin side when the absorbent article is worn, that is, relatively close to the wearer's skin. The "non-skin-facing surface" is a side of the constituent member of the absorbent article, which is facing away from the wearer's skin side when the absorbent article is worn, that is, relatively away from the wearer's skin. On the side. In addition, in the present specification, "when worn" means a normal proper wearing position, that is, a state in which the correct wearing position of the absorbent article is maintained, unless the absorbent article is used, unless otherwise specified. It does not include when it is in a shifted state.

As shown in FIG. 1, a skin care agent is attached to the skin contact surface of the napkin 1, that is, the skin-facing surface of the topsheet 2. The skin care agent forms continuous lines 60A and 60B extending in the vertical direction X while being folded back in the horizontal direction Y in a plan view as shown in FIG. In the napkin 1, a plurality of, specifically, two continuous lines 60A and 60B are arranged side by side in the lateral direction Y on the skin contact surface. A plurality of folded-back portions 61 are provided on one side and the other side of the continuous lines 60A and 60B in the lateral direction Y, respectively. The folded portion 61 is a portion marked with a circle in the continuous lines 60A and 60B in FIG. 1, and is a change point of the lateral component in the extending direction of the continuous lines 60A and 60B, that is, the continuous lines 60A and 60B in FIG. A portion in which the extending direction changes from the right direction to the left direction or from the left direction to the right direction.

As shown in FIG. 1, the skin-contacting surface of the napkin 1 has a plurality of (two) continuous lines 60A and 60B arranged side by side in the lateral direction Y and has a quadrangular skin-care agent placement region 7 (a dotted line in FIG. 1). Area surrounded by). In the present specification, the “skin care agent placement area” is one closed area including a plurality of continuous lines of the skin care agent placed on the skin contact surface of the absorbent article, and is specifically determined by the following method. ..

<Determination method of skin care agent placement area>
This will be described with reference to FIG. When a plurality of (two) continuous lines 60C and 60D extending in the vertical direction X are arranged in parallel in the horizontal direction Y, the plurality of continuous lines 60C and 60D are vertically arranged at an arbitrary position outside the horizontal direction Y. A single virtual straight line VL extending in the direction X is drawn, and a plurality of folded-back portions 61 and the virtual straight line VL existing on the virtual straight line VL side (left side of the continuous line 60C in FIG. 3) of the continuous line 60C closest to the virtual straight line VL. Is measured, the average value of the measured values of the plurality of distances is calculated as the average distance a, and a virtual straight line Va extending in the vertical direction X is drawn at a position separated from the virtual straight line VL by the average distance a. Further, the distances between the virtual straight lines VL and the plurality of folding portions 61 existing on the opposite side of the continuous line 60D farthest from the virtual straight line VL (on the right side of the continuous line 60D in FIG. 3) are measured, respectively. An average value of the measured values of a plurality of distances is calculated as an average distance d, and a virtual straight line Vd extending in the vertical direction X is drawn at a position separated from the virtual straight line VL by the average distance d. Further, in all the continuous lines 60C and 60D existing in the area sandwiched between these two virtual straight lines Va and Vd, the portion 65 located at the outermost portion in the vertical direction X is selected, and the outermost portion in the vertical direction is selected. Two virtual straight lines Vy1 and Vy2 extending in the lateral direction Y through 65 are drawn. The area of the quadrangular shape (rectangular shape) in plan view surrounded by the four virtual straight lines Va, Vd, Vy1, and Vy2 thus drawn is the skin care agent placement area 7.

Further, each of the continuous lines 60A to 60D has a unique "average lateral length". As shown in FIGS. 1 and 3, in the continuous lines 60A to 60D, the lateral positions of the plurality of folded-back portions 61 are not uniform (has the first feature described below), and the folded-back portions 61 have different positions. The length in the lateral direction Y is not uniform. The "average lateral length" is an average value of lateral lengths at a plurality of folded portions included in one continuous line, and is calculated by the following method.

<Calculation method of average lateral length of continuous line>
This will be described with reference to FIG. In order to calculate the average lateral length of each of the two continuous lines 60C and 60D in FIG. 3, the folding lines 61 and the virtual straight line VL on both sides of each continuous line 60C and 60D in the lateral direction Y are calculated. It is necessary to calculate the average distance of each. In FIG. 3, in addition to the average distances a and d calculated in the method for determining the skin care agent placement area described above, the average distances b and c calculated by the same method are also shown, and the virtual straight line is also shown. A virtual straight line Vb extending in the vertical direction X is drawn at a position separated from the VL by an average distance b, and a virtual straight line Vc extending in the vertical direction X is drawn at a position separated from the virtual straight line VL by an average distance c. Here, the "average lateral length" of the continuous line 60C is calculated by (ba), and the "average lateral length" of the continuous line 60D is calculated by (dc).

The "portion having the average lateral length" in the continuous line is a portion which is the main body of the continuous line, and the skin care effect of the skin care agent forming the continuous line is substantially exhibited by the portion, and the continuous line Various properties such as flexibility and liquid permeability of the constituent member (the surface sheet 2 in the napkin 1) of the absorbent article to which the lines are attached are affected to a considerable extent. In the form of FIG. 3, the “portion having the average lateral direction length” in the continuous line 60C is a portion sandwiched between two virtual straight lines Va and Vb extending in the vertical direction, and the “average lateral direction” in the continuous line 60D. The “portion having a length” is a portion sandwiched between two virtual straight lines Vc and Vd extending in the vertical direction. Further, in the embodiment of FIG. 3, the continuous line 60C has a shorter average lateral length than the continuous line 60D, and the skin care agent placement region 7 has a plurality of continuous lines 60C and 60D having different average lateral lengths. Are arranged side by side in the horizontal direction Y.

The napkin 1 of the present embodiment has, as a first feature, "the positions of the plurality of folded-back portions 61 in the lateral direction Y are not uniform on one side and the other side of the continuous line 60A, 60B in the lateral direction Y". Have. The first characteristic of the napkin 1 is that, in the continuous line 90 of the conventional skin care agent adhesion pattern shown in FIG. 11, the positions of the plurality of folded-back portions 91 in the horizontal direction Y are one side and the other side of the horizontal direction Y. In contrast to having them all. In the regular spiral pattern composed of the continuous lines 90 shown in FIG. 11, the portion where the amount of skin care agent deposited per unit area is relatively high (folded portion 91 and its vicinity) and the portion where it is relatively low (one Since there is a folded portion 91 on one side in the lateral direction Y and a central portion of the folded portion 91 on the other side in the continuous line 90, a plurality (three) continuous lines 90 are arranged in parallel in the lateral direction Y. In addition, there is a difference in shade of the skin care agent in the area where the skin care agent is arranged, which may cause unevenness in the skin care effect and unstable expression of the skin care effect. On the other hand, in the napkin 1 having the first characteristic, the positions of the plurality of folded-back portions 61 in the lateral direction Y are different on the one side and the other side in the lateral direction Y of the continuous lines 60A and 60B of the skin care agent 6. Due to the unevenness, the difference in shade of the skin care agent is unlikely to occur in the skin care agent placement area 7, and the same skin care effect can be obtained regardless of where the wearer's skin comes into contact with the skin care agent placement area 7, and the skin care effect is stably expressed. You can Further, it is feared that the adhesion of the skin care agent may impair various properties such as flexibility, stretchability, and body followability originally possessed by the napkin 1, but the fear is eliminated by having the first characteristic. It

Regarding the first feature of the napkin 1, “on each side in the lateral direction Y of the continuous lines 60A and 60B, “the lateral positions of the plurality of folded portions 61 are not uniform” means that the following (A) is satisfied. To do.

(A) On each of both sides in the horizontal direction Y of the continuous lines 60A and 60B, "an arbitrary one folded-back portion 61" and "a position on one side in the vertical direction X with respect to the arbitrary one folded-back portion 61" Of the other folded-back portions 61 that are closest to the arbitrary one folded-back portion 61, and the other folded-back portion that is located on the other side in the vertical direction X with respect to the arbitrary one folded-back portion 61. The one that is the closest to the arbitrary one folded-back portion 61 out of the 61" (that is, the two other folded-back portions 61, 61 located before and after the arbitrary one folded-back portion 61 in the longitudinal direction X). ) And, the lateral position is different from each other.

In the above (A), “a state in which the lateral positions are different from each other” means that one of the two folded portions 61, 61 for comparing the lateral positions is 1 mm on each side in the lateral direction Y from one folded portion 61. This means a state in which another folded-back portion 61 does not exist in the strip-shaped region 61B (see FIG. 3) sandwiched by two virtual straight lines extending in the vertical direction X through the separated positions. When the lateral positions of the two folded-back portions 61, 61 are not different from each other, the lateral positions of the two folded-back portions 61, 61 are considered to match.

In addition, the napkin 1 of the present embodiment has a second feature that "in the skin care agent placement area 7, a plurality of continuous lines 60A and 60B having different average lateral lengths are arranged side by side in the lateral direction Y". Have. The “average lateral length” here is as described above. The second characteristic of the napkin 1 is that, in contrast to the plurality of (three) continuous lines 90 forming the conventional skin care agent adhesion pattern shown in FIG. 11, the average lateral lengths are the same. is there. The second characteristic is that the same effect as the first characteristic can be obtained, and the napkin 1 has both characteristics, so that it is excellent in various characteristics such as flexibility, stretchability, and body followability, and The skin care effect of the skin care agent can be stably exhibited.

With regard to the second feature, the present invention also includes a form in which three or more continuous lines are arranged side by side in the lateral direction in the skin care agent placement region. In such a form, at least one continuous line is provided. The continuous line and one other continuous line may have different average lateral lengths, or all continuous lines may have different average lateral lengths.

Further, the napkin 1 of the present embodiment has a third feature that "the skin care agent placement region 7 is located in the crotch portion 1M and is located at the center in the lateral direction Y of the skin contact surface (the skin facing surface of the topsheet 2). The length in the lateral direction Y of the overlapped and arbitrary portion in the skin care agent disposing region 7 is 30% or more of the length in the lateral direction Y of the portion at the same position in the longitudinal direction as the arbitrary portion of the skin contact surface. Is. The position and size of the skin care agent placement region 7 in which a plurality of the continuous lines 60A, 60B are arranged even if the adhesion pattern of the characteristic skin care agents having the first and second characteristics by the continuous lines 60A, 60B is adopted. If the thickness is inappropriate, it is difficult to achieve the desired effect. The third feature is adopted in consideration of such a point, so that the skin care agent placement region 7 can exist with a certain size centering on the crotch portion 1M including the excretion point. It was done.

As shown in FIG. 1, the skin care agent placement region 7 is located over the entire length of the crotch portion 1M in the vertical direction X, and is also located in a part of each of the abdominal portion 1F and the back portion 1R, and the napkin 1 It is overlapped with a horizontal center line CLy that bisects the skin contact surface in the horizontal direction Y, and is configured as in the first half portion of the third feature.

Regarding the latter half of the third feature, referring to FIG. 1, for example, when focusing on the portion overlapping with the II line, the length in the lateral direction Y of the II line overlapping portion in the skin care agent disposition region 7. W2 occupies 30% or more of the length W1 in the lateral direction Y of the portion of the napkin 1 that overlaps with the I-I line overlapping portion on the skin contact surface, and other portions than the I-I line overlapping portion. As for the above, it is necessary that such a ratio is satisfied. Such a ratio is preferably 50% or more, more preferably 70% or more.

From the viewpoint of more reliably producing the effects of the first to third features, the plurality of continuous lines 60A and 60B existing in the skin care agent placement region 7 have an average lateral length in each continuous line 60A and 60B. It is preferable that the portions having the height are arranged so as to be intermittently arranged in the lateral direction Y. This arrangement will be described with reference to FIG. 3. The portion having the average lateral direction length in the continuous line 60C is a portion sandwiched between two virtual straight lines Va and Vb, and the average lateral direction in the continuous line 60D. A portion having a length is a portion sandwiched between two virtual straight lines Vc and Vd, and a portion sandwiched between two virtual straight lines Vb and Vc is interposed between these two portions. Therefore, the portion having the average lateral length in the continuous line 60C and the portion having the average lateral length in the continuous line 60D are intermittently arranged in the lateral direction Y.

Further, from the same viewpoint, the interval (c-b) between the portions sandwiched between the virtual straight lines Vb and Vc, that is, the portions having the average lateral length of each of the two continuous lines 60C and 60D adjacent to each other in the lateral direction Y. ) Is preferably shorter than the shorter average lateral length of the two continuous lines 60C and 60D. In the form of FIG. 3, since the continuous line 60C has a shorter average lateral length than the continuous line 60D, "spacing (c-b)<average horizontal length of continuous line 60C (ba" )” is preferable. Moreover, when there are a plurality of portions corresponding to the interval (c-b) in the skin care agent placement region 7, preferably, at least 50%, more preferably at least 80% of the plurality of intervals have such a magnitude relationship. It is preferable to be established.

Although the plurality of continuous lines 60A and 60B do not overlap in the form of FIG. 1, from the viewpoint of ensuring the effects of the first to third features more reliably, the continuous lines 60A and 60B are different from those of the form of FIG. It is preferable that the plurality of continuous lines 60C and 60D overlap and share a plurality of intersections. In the form of FIG. 3, the continuous lines 60C and 60D share the intersection of two points and are overlapped at the two points.

As shown in FIG. 4, a particularly preferable form regarding the overlapping of the plurality of continuous lines is that, as shown in FIG. 4, a plurality of (two) continuous lines 60E and 60F share a plurality of intersections 62 (portions indicated by ● in FIG. 4). The positions in the lateral direction Y are irregular. In FIG. 4, the dotted line is the continuous line 60E and the solid line is the continuous line 60F. "The lateral positions of the plurality of intersections 62 are not uniform" means that the following (B) is satisfied. The following (B), which defines the horizontal position of the intersection point 62, has the same basic concept as (A), which defines the horizontal position of the folded portion 61.

(B) “One arbitrary intersection point 62” and “One arbitrary intersection point 62 among the other intersection points 62 located on one side in the vertical direction X with respect to the one arbitrary intersection point 62”. Which is the closest to the arbitrary one intersection 62 among the other intersections 62 located on the other side in the vertical direction X with respect to the arbitrary one intersection 62" (that is, The position in the horizontal direction is different from that of any one intersection 62 and the other two intersections 62, 62) located before and after in the vertical direction X.

In the above (B), "a state in which the lateral positions are different from each other" means that the lateral position is separated by 1 mm from one of the two intersecting points 62, 62. This means that there is no other intersection point 62 in the strip-shaped region 62B (see FIG. 4) sandwiched by two virtual straight lines extending in the vertical direction X through the position. If the lateral positions of the two intersections 62, 62 are not in different states, the lateral positions of the two intersections 62, 62 are considered to match.

On the other hand, for example, in the form of FIG. 12, a plurality of intersections 92 shared by a plurality (two) of continuous lines 90, 90 exist at any of three lateral positions Y1, Y2, Y3, Since the condition (B) is not satisfied, it can be said that their lateral positions are not uneven, but rather the lateral positions of the plurality of intersections 92 are aligned. A configuration in which a plurality of intersections shared by a plurality of continuous lines are aligned in the lateral direction as shown in FIG. 12 is not preferable because the density difference of the skin care agent is likely to occur. In addition, the form of FIG. 12 is obtained by partially overlapping the continuous lines 90, 90 in the conventional skin care agent adhesion pattern shown in FIG. 11, and does not have the first and second characteristics described above. It is outside the scope of the invention.

The continuous lines 60A to 60F of the skin care agent described above each have a plurality of closed annular portions including the intersections of the continuous lines themselves. In the case of such an annular continuous line, the annular type shown in FIG. It is preferable that the positions of the intersections 64 of the continuous lines 60G themselves in the lateral direction Y in each of the plurality of annular portions 63 are not uniform as in the continuous line 60G. The phrase “the lateral positions of the plurality of intersections 64 are not uniform” means that the condition (B) is satisfied. That is, when the "intersection point 62" in (B) is replaced with the "intersection point 64", if the above (B) is satisfied, the lateral positions of the plurality of intersection points 64 are not uniform. The feature of the unevenness of the intersections 64 in the annular portion 63 of the continuous line 60G is that the positions of the intersections of the continuous lines 90 themselves in the plurality of annular portions are aligned in the lateral direction Y in the conventional annular type continuous line 90 shown in FIG. In contrast to that. When adopting the continuous line of the annular type, by adopting the irregular shape of the intersection points 64 such as the continuous line 60G, the uneven distribution of the skin care agent in the skin care agent arrangement region is further alleviated, and the skin care is performed depending on the part of the absorbent article. The inconvenience that the effects are different is further less likely to occur.

Further, in the annular portion in the continuous line of the annular type described above, as in the annular portion 63A shown in FIG. 6A, the vertical length LX is longer than the horizontal length LY. As shown in the annular portion 63B shown in FIG. 6(b), there is a horizontal type in which the horizontal length LY is longer than the vertical length LX, and the present invention includes both types. A vertically long type such as the annular portion 63A is more preferable. The reason is related to the fiber orientation of the member (the surface sheet 2 in the napkin 1) forming the skin contact surface of the absorbent article to which the skin care agent is attached. That is, from the viewpoint of improving the body following property of the napkin 1, it is preferable that the topsheet 2 be easily bent in the lateral direction Y along a bending line extending in the longitudinal direction X. Further, the topsheet 2 is a sheet in an absorbent article such as the topsheet 2. 6A is a longitudinal member in which the constituent fibers (not shown) generally extend along the longitudinal direction X and have a fiber orientation along the longitudinal direction X. The annular portion 63A has more overlapping portions with the vertically oriented constituent fibers than the horizontally long type annular portion 63B shown in FIG. 6(b), and therefore is easily bent in the lateral direction Y at the annular portion. Therefore, as the annular portion of the continuous line of the annular type, like the longitudinally-shaped annular portion 63A, "the same direction as the fiber orientation of the member (surface sheet 2) to which the continuous line (skin care agent) is attached (longitudinal direction) X) is longer than the direction (transverse direction Y) orthogonal to the fiber orientation” is preferable.

From the viewpoint of more reliably producing such action and effect, the ratio of the vertical length LX and the horizontal length LY of the annular portion in the vertical type continuous line is preferably 1 as LX/LY. 0.1 or more, more preferably 1.4 or more, and preferably 4 or less, more preferably 3 or less.
From the same viewpoint, it is preferable that 50% or more, and more preferably 80% or more, of all the annular portions included in one continuous wire of the annular type are the longitudinally elongated annular portions.

As described above, the continuous line of the skin care agent has been described mainly regarding the form in the plane direction of the skin contact surface of the absorbent article (the form of the continuous line in plan view), but not only in the plane direction but also in the thickness direction of the absorbent article. It is also possible to improve the skin care effect and the like by devising a method. That is, referring to FIG. 7, the skin contact surface to which the continuous line 60 of the skin care agent is attached is the uneven surface 2a as shown in FIG. 7A and the flat surface 2b as shown in FIG. 7B. In the case of, the uneven surface 2a is a unit of the skin care agent while suppressing deterioration of various characteristics such as flexibility and liquid permeability of the member (the surface sheet 2 of the napkin 1) forming the skin contact surface. This is preferable because it is possible to increase the amount of adhesion per area (region surrounded by a dotted line in FIG. 7). When the amount of skin care agent deposited per unit area is increased by increasing the number of continuous lines 60 or increasing the line width, for example, on the flat surface 2b as shown in FIG. The skin care agent adhered in a large amount may reduce the flexibility and liquid permeability of the skin contact surface forming member such as the surface sheet to which the skin care agent is adhered. With the uneven surface 2a as shown in FIG. 7(a), inconvenience due to the adhesion of such a large amount of skin care agent is unlikely to occur.

From this point of view, the continuous line 60 of the skin care agent preferably has a portion extending in the thickness direction Z of the absorbent article such as the napkin 1, as shown in FIG. 7A, and more specifically In addition, it is preferable that the uneven surface is formed. That is, it is preferable that at least the skin contact surface of the absorbent article, that is, the skin facing surface of the topsheet 2 in the case of the napkin 1 shown in FIG. It should be noted that the pattern of irregularities on the skin contact surface is not limited to a pattern in which ridges and grooves extending in the vertical direction X are alternately arranged in the horizontal direction Y as shown in FIG. A publicly known uneven pattern used for a surface sheet of an absorbent article or the like can be appropriately adopted.

The adhesion amount of the skin care agent is not particularly limited, but according to the adhesion pattern according to the present invention described above, the skin contact surface of the absorbent article is relatively large even if the adhesion amount of the skin care agent is relatively large from the viewpoint of improving the skin care effect. Since it is hard to cause deterioration in various properties such as flexibility (surface sheet etc.), liquid permeability, and body followability, the degree of freedom of the amount of skin care agent adhered is high. A preferable skin care agent adhesion amount (basis weight) is, for example, in terms of solid content, preferably 1 g/m ² or more, more preferably 5 g/m ² or more, and preferably 20 g/m ² or less, more preferably 15 g/m ^2. m ² or less. Adhesion of the skin care agent to the skin contact surface of the absorbent article can be carried out by a conventional method using a known coating device.

The width of the continuous line of the skin care agent (the length in the direction orthogonal to the extending direction of the continuous line) is preferably 10 mm or more, more preferably 15 mm or more, and preferably 50 mm or less, more preferably 30 mm or less. ..

As the skin care agent used in the present invention, those having an effect of protecting the skin of the wearer, healing and the like can be used without particular limitation, and for example, an oily skin care agent used as an emollient agent in the field of cosmetics. Etc. can be used. Examples of the emollient agent include diamide derivative (BRS), liquid paraffin, silicone oil, animal and vegetable oil (olive oil, jojoba oil, safflower oil, squalane, squalene, etc.), monoglyceride, diglyceride, triglyceride, aliphatic ether (myristyl-1). , 3-dimethylbutyl ether, palmityl-1,3-dimethylbutyl ether, stearyl-1,3-dimethylbutyl ether, palmityl-1,3-methylpropyl ether, stearyl-1,3-methylpropyl ether, etc.), isostearyl-cholesterol Esters and the like can be mentioned, and one of these can be used alone, or two or more can be used in appropriate combination.

If necessary, the skin care agent (emollient agent) may be mixed with one or more selected from the group consisting of a moisturizing component and a solidifying agent. That is, the skin care agents used in the present invention include those containing, in addition to the emollient agent, one or more of a moisturizing component and a solidifying agent.

Examples of the moisturizing component include mucopolysaccharides such as amino acids, pyrrolidonecarboxylic acid, lactic acid, hyaluronic acid and chondroitin sulfate; polyhydric alcohols such as glycerin, propylene glycol, butylene glycol and sorbit; soluble collagen, elastin, keratin. Hydrolyzed protein such as; placenta extract extracted from bovine placenta extract, mucin of glycoprotein produced and secreted in gastric mucosa of mammals, salivary glands, chitin and chitosan mainly composed of crab and shrimp shells, Bifidobacterium metabolites, yeast fermentation metabolites, yeast extracts and the like can be mentioned, and one of these can be used alone or in combination of two or more.

Examples of the solidifying agent include fatty alcohols having 14 to 22 carbon atoms, fatty acids having 12 to 22 carbon atoms, and fatty alcohol ethoxylates having an average degree of ethoxylation of about 2 to 30 and having 12 to 22 carbon atoms. These may be used alone or in appropriate combination of two or more.

If necessary, a thermoplastic resin may be mixed with the skin care agent (emollient agent) from the viewpoint of improving the coating suitability. Examples of the thermoplastic resin include polyolefin, polyolefin copolymer, polyvinyl alcohol, polyvinyl ester, polyvinyl alkanal, polyvinyl ketal, polyamide, polyimide, polycarbonate, polycarbonate blend, polyester, polyester blend, poly(meth)acrylate, poly(meth). Acrylate-styrene copolymer blends, poly(meth)acrylate-polyvinylidene fluoride blends, polyurethanes, polystyrenes, styrene copolymers, polyethers, polyetherketones, polysulfones, polyvinyl chlorides and the like, one of which alone or 2 Any combination of at least one species can be used.

In addition to the thermoplastic resin, the skin care agent (emollient agent) may further contain a plasticizer. Examples of the plasticizer include vegetable oil, glycerin, diglycerin, polyglycerin, ethylene glycol, diethylene glycol, propylene glycol, 1,3-butanediol, 1,4-butanediol, and the like. Alternatively, two or more kinds may be appropriately combined and used.

8 to 10 show main parts of another embodiment of the absorbent article according to the present invention. Regarding other embodiments to be described later, the configuration parts different from the above-described embodiment will be mainly described, and the same components will be denoted by the same reference numerals and description thereof will be omitted. The description of the above-described embodiment is appropriately applied to components that are not particularly described.

The plural (two) continuous lines 60H and 60I shown in FIG. 8 do not have the intersections of the continuous lines 60H and 60I themselves. Then, as shown in FIG. 9, the lateral lengths LY1 to LY5 between the two folded-back portions 61, 61 (portions circled in the continuous line 60H in FIG. 8) arranged in the extending direction of the continuous line 60H are not uniform. Is. Although only the continuous line 60H is representatively shown in FIG. 9, the continuous line 60I is also configured similarly to the continuous line 60H. The phrase "the lateral lengths of the two folded portions arranged in the extending direction of the continuous line are not uniform" means that the following (C) is satisfied.

(C) When the space between any two folded portions 61, 61 arranged in the extending direction of the continuous lines 60H, 60I is defined as "between the reference folded portions", between the reference folded portions and "between the reference folded portions. On the other hand, among the other folded-back portions located on one side in the vertical direction X, the one closest to the reference folded-back portions and the other located on the other side in the vertical direction X with respect to the reference folded-back portions. The one that is closest to the reference folding portion among the folding portions" (that is, between two other folding portions located in the longitudinal direction X with respect to the reference folding portion). Are in different states.

The non-annular type continuous line such as the continuous lines 60H and 60I has a cross point of one continuous line itself, as compared with the continuous line of the annular type having a closed annular portion such as the continuous lines 60A to 60G described above. The concentration per unit area of the skin care agent tends to be low due to the lack thereof. Therefore, the continuous line of the non-circular type may give a step to the circular type in terms of the skin care effect, but the difference in shade of the skin care agent tends to be smaller than that of the cyclic type, and the skin care agent has a It has an advantage that it is difficult to cause inconvenience such as deterioration of various properties such as flexibility and stretchability due to a large amount of adhesion. For applications that emphasize the skin care effect, it is called an annular type continuous wire such as continuous wires 60A to 60G, and for applications that emphasize the flexibility and texture of the absorbent article, it is called a non-annular type continuous wire such as continuous wires 60H and 60I. Choices are possible.

10(a) to 10(d) show specific examples of the adhesion pattern of the skin care agent according to the present invention. 10(a) and 10(b) are both patterns adopting an annular type continuous line, and FIGS. 10(c) and 10(d) are both patterns adopting a non-annular type continuous line. .. The pattern of FIG. 10(b) has a larger number of continuous lines arranged in the lateral direction Y than the pattern of FIG. 10(a), and the pattern of FIG. 10(d) has the pattern of FIG. 10(c). The number of continuous lines arranged in the horizontal direction Y is larger than that of the pattern.

Although the present invention has been described above, the present invention is not limited to the above-described embodiments and can be modified as appropriate. For example, in the above-described embodiment, the topsheet 2, which is a member that forms the skin contact surface to which the skin care agent is attached, has a single layer structure, but the member may have a plurality of layer structures. .. All the parts of the one embodiment described above can be appropriately used mutually. In addition, the absorbent article of the present invention is not limited to the sanitary napkin as in the above-mentioned embodiment, and widely includes articles used for absorbing body fluids (urine, menstrual blood, loose stool, sweat, etc.) discharged from the human body. , Panty liner (orientation sheet), sanitary shorts, incontinence pad, deployable disposable diaper, pants-type disposable diaper and the like are also included. Regarding the above-described embodiment of the present invention, the following supplementary notes are further disclosed.

<1>
Having a crotch portion arranged in the crotch portion of the wearer, having a longitudinal direction extending from the wearer's abdomen side to the back side through the crotch portion and a lateral direction orthogonal thereto, and contacting the wearer's skin An absorbent article in which a skin care agent is adhered in a predetermined pattern on a possible skin contact surface,
The skin care agent forms a continuous line extending in the vertical direction while being folded back in the horizontal direction in a plan view, and a plurality of folded portions are present on one side and the other side of the continuous line, respectively, and the one side in the horizontal direction and On each of the other side, the lateral positions of the plurality of folded portions are not uniform,
The skin contact surface has a plurality of continuous lines having different average lateral lengths, and a skin care agent placement region having a rectangular shape in a plan view in which the continuous lines are placed side by side.
The skin care agent placement region is located in the crotch region and overlaps with the lateral center of the skin contact surface, and the lateral length of any portion of the skin care agent placement region is the skin contact surface. An absorbent article which is 30% or more of the lateral length of a portion existing at the same position in the longitudinal direction as the portion.
<2>
The lateral length of an arbitrary portion in the skin care agent placement region is preferably 50% or more, more preferably 70% or more, of the lateral length of a portion of the skin contacting surface at the same position in the longitudinal direction as the arbitrary portion. The absorbent article according to <1>, which is at least %.

<3>
The continuous line has a plurality of closed annular portions including intersections of the continuous lines themselves, and the lateral positions of the intersections of the plurality of annular portions are uneven, and the absorption according to <1> or <2> above. Sex goods.
<4>
The absorbent article according to <3>, wherein the annular portion is a vertically long type in which the length in the lengthwise direction is longer than the length in the widthwise direction.
<5>
The ratio of the length in the longitudinal direction to the length in the lateral direction of the longitudinal type annular portion is preferably 1.1 or more, more preferably 1.4 or more, and preferably 4 or less, more preferably 3 as the former/the latter. The absorbent article according to <4>, which is the following.
<6>
Of all the annular portions included in one continuous line, preferably 50% or more, and more preferably 80% or more are the vertically long type annular portions described in <4> or <5> above. Sex goods.

<7>
The continuous line does not have an intersection of the continuous line itself, and the lateral lengths between the two folded-back portions arranged in the extending direction of the continuous line are uneven, <1> or <2> The absorbent article according to.
<8>
The absorbent article according to any one of <1> to <7>, wherein lateral positions of a plurality of intersections shared by the plurality of continuous lines are uneven.

<9>
Any one of the above-mentioned <1> to <7>, wherein the plurality of continuous lines existing in the skin care agent placement region are arranged such that portions having an average horizontal direction length in each continuous line are intermittently arranged in the horizontal direction. The absorbent article according to 1 above.
<10>
The interval between the portions having the average lateral length of each of the two continuous lines adjacent to each other in the lateral direction is equal to the average lateral length of the two continuous lines having the shorter average lateral length. The absorbent article according to <9>, which is shorter than the absorbent article.
<11>
In the skin care agent placement region, there are a plurality of intervals between portions having the average lateral length of each of the two continuous lines that are laterally adjacent to each other, and preferably 50% or more of the plurality of intervals, and Preferably, for 80% or more, the above-mentioned <10> in which a size relation of “the interval <the average lateral length of the two continuous lines defining the interval, which has a shorter average lateral direction” is satisfied is satisfied. The absorbent article described.

<12>
The said continuous line is an absorbent article any one of said <1>-<11> which has a part extended in the thickness direction of the said absorbent article.
<13>
The absorbent article according to any one of <1> to <12>, wherein the skin contact surface to which the continuous line of the skin care agent is attached is an uneven surface.
<14>
The amount of the skin care agent attached is preferably 1 g/m ² or more, more preferably 5 g/m ² or more, and preferably 20 g/m ² or less, more preferably 15 g/m ² or less, in terms of solid content. The absorbent article according to any one of <1> to <13>.
<15>
The width of the continuous line of the skin care agent is preferably 10 mm or more, more preferably 15 mm or more, and preferably 50 mm or less, more preferably 30 mm or less, according to any one of the above items <1> to <14>. Absorbent article.
<16>
Three or more continuous lines are arranged side by side in the lateral direction in the skin care agent placement region, and at least one continuous line among the three or more continuous lines and another continuous line are averaged. The absorbent article according to any one of the above items <1> to <15>, which has different lateral lengths or different average lateral lengths in all continuous lines.

<17>
The said skin care agent is an absorbent article any one of said <1>-<16> containing an emollient and one or more types of a moisturizing component and a solidifying agent.
<18>
The moisturizing ingredients include mucopolysaccharides such as amino acids, pyrrolidonecarboxylic acid, lactic acid, hyaluronic acid, and chondroitin sulfate; polyhydric alcohols such as glycerin, propylene glycol, butylene glycol, and sorbit; proteins such as soluble collagen, ulastin, and keratin. Hydrolyzate: Placenta extract extracted from bovine placenta extract, mucin, a glycoprotein produced and secreted in mammalian gastric mucosa, salivary gland, chitin/chitosan mainly composed of crab and shrimp shells, and bifidobacterial metabolism The absorbent article according to <17>, which is one kind or two or more kinds selected from the group consisting of a product, a yeast fermentation metabolite, and a yeast extract.
<19>
The solidifying agent is selected from the group consisting of a fatty alcohol having 14 to 22 carbon atoms, a fatty acid having 12 to 22 carbon atoms, and a fatty alcohol ethoxylate having an average degree of ethoxylation of 2 to 30 and having 12 to 22 carbon atoms. The absorbent article according to <17> or <18, which is one kind or two or more kinds.

<20>
The <1> to <19, wherein the member capable of forming a skin contact surface that can contact the wearer's skin when worn includes a leakproof member, and the skincare agent is attached to the leakproof member. > The absorbent article according to any one of <1>.
<21>
The absorbent article according to any one of <1> to <20>, which is a deployable disposable diaper including a fastening tape for fastening.
<22>
The absorbent article is any one of <1> to <20>, which is a pants-type disposable diaper in which a front body and a back body are joined to form a waist opening and a pair of leg openings. The absorbent article according to.

1 Absorbent article (sanitary napkin)
1F Abdominal part 1M of absorbent article 1M Crotch part 1R of absorbent article Back side part of absorbent article 2 Topsheet 3 Backsheet 4 Absorber 5 End seal part 60, 60A, 60B, 60C, 60D, 60E, 60F, 60G, 60H, 60I, 90 Continuous line of skin care agent 61, 91 Folding portion 62, 92 Intersection point of plural continuous lines 63, 63A, 63B Annular portion of continuous line 64 Intersection point of continuous line itself in annular section 7 Skin care agent arrangement Area X Vertical direction Y Horizontal direction

Claims (7)

Having a crotch portion arranged in the crotch portion of the wearer, having a longitudinal direction extending from the wearer's abdomen side to the back side through the crotch portion and a lateral direction orthogonal thereto, and contacting the wearer's skin An absorbent article in which a skin care agent is adhered in a predetermined pattern on a possible skin contact surface,
The skin care agent forms a continuous line extending in the vertical direction while being folded back in the horizontal direction in a plan view, and a plurality of folded portions are present on one side and the other side of the continuous line, respectively, and the one side in the horizontal direction and On each of the other sides, the lateral positions of the plurality of folded portions are not uniform,
The skin contact surface has a plurality of continuous lines having different average lateral lengths arranged side by side in the lateral direction, and has a skin care agent placement region of a rectangular shape in plan view determined by the following method ,
The skin care agent placement region is located in the crotch region and overlaps with the lateral center of the skin contact surface, and the lateral length of any portion of the skin care agent placement region is the skin contact surface. An absorbent article which is 30% or more of the lateral length of a portion existing at the same position in the longitudinal direction as the portion.
<Determination method of skin care agent placement area>
When the plurality of continuous lines extending in the vertical direction are arranged in parallel in the horizontal direction, one virtual straight line VL extending in the vertical direction is drawn at an arbitrary position outside the plurality of continuous lines in the horizontal direction. ..
Next, the distances between the virtual straight line VL and the plurality of folding portions existing on the virtual straight line VL in the continuous line closest to the virtual straight line VL are measured, and the average value of the measured values of the multiple distances is calculated and averaged. A distance a is set, and a virtual straight line Va extending in the vertical direction is drawn at a position separated from the virtual straight line VL by the average distance a. Further, the distance between the virtual straight line VL and the plurality of folding portions existing on the side opposite to the virtual straight line VL side in the continuous line farthest from the virtual straight line VL is measured, and the average value of the measured values of the multiple distances is calculated. A virtual straight line Vd extending in the vertical direction is drawn at a position separated from the virtual straight line VL by the average distance d by calculating the average distance d.
Next, in all the continuous lines existing in the area sandwiched between the two virtual straight lines Va and Vd, the portion located at the outermost portion in the vertical direction is selected, and passes through the outermost portion in the vertical direction. Two virtual straight lines Vy1 and Vy2 extending in the lateral direction are drawn.
The area of the quadrangular shape in plan view surrounded by the four virtual straight lines Va, Vd, Vy1, and Vy2 thus drawn is the skin care agent placement area. The absorbent article according to claim 1, wherein the continuous line has a plurality of closed annular portions including intersections of the continuous lines themselves, and lateral positions of the intersections of the plurality of annular portions are uneven. The absorbent article according to claim 2, wherein the annular portion has a longitudinal length that is longer than a lateral length. The absorptivity according to claim 1, wherein the continuous line does not have an intersection of the continuous line itself, and the lateral lengths of the two folded portions arranged in the extending direction of the continuous line are not uniform. Goods. The absorbent article according to any one of claims 1 to 4, wherein lateral positions of a plurality of intersections shared by the plurality of continuous lines are uneven. 5. The plurality of continuous lines existing in the skin care agent placement region are arranged such that portions having an average lateral direction length in each continuous line are laterally intermittently arranged. The absorbent article according to. The absorbent article according to any one of claims 1 to 6, wherein the continuous line has a portion extending in a thickness direction of the absorbent article.

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