JP4390450B2 - Colored absorbent articles - Google Patents

Description

【０１５２】
【表２】

【０１５３】
＜実施例１２および１３＞
実施例１２および実施例１３として、表面シート、中間シート、吸収シート、および裏面シートが重ねられたパンティーライナーを製造した。
【０１５４】
両実施例での表面シートは、縦方向に延びる畝と溝とが横方向へ一定のピッチで賦形されており、また前記領域内に、多数のピンエンボス部が規則的に形成されているものを使用した。ただし、ピンエンボス部でシートに強制的な開孔を形成していない。
【０１５５】
畝の横方向での配列ピッチは２ｍｍである。ピンエンボス部は、表面シートの畝溝の溝部の底面に沿って形成されているものであり、このピンエンボス部の配列は、横方向のピッチが畝のピッチと同じ２ｍｍであり、縦方向のピッチ（溝に沿う方向のピッチ）は２．３ｍｍである。ピンボス部の直径は０．７ｍｍ、幅寸法２０ｍｍの領域内でのピンエンボス部の占有面積率を８．３％とした。
【０１５６】
表面シートは、不織布を第１のロールと第２のロールとの間で挟圧することで前記畝と溝およびピンエンボスを同時に形成したものを使用した。第１のロールは、ロール円周方向に延びる幅が１．３ｍｍの凹部が、ロール軸方向へ２ｍｍのピッチで形成され、さらに溝と溝との間に、直径が０．７ｍｍの押圧ピンがロール円周方向へ向けて２．３ｍｍのピッチで配列されたものを使用した。第２のロールは、ロール円周方向に延びる幅が０．３ｍｍの凸部が、ロール軸方向へ２ｍｍのピッチで形成されたものを使用した。
【０１５７】
第１のロールの押圧ピンが第２のロールの凸部と凸部との間の溝の底部に当たるようにして、不織布を加圧する。このときのロール表面の温度を１００〜１１０℃、ロールどうしの圧力を、２４５０ｋＰａとした。その結果、畝溝をおよびピンエンボスを有する厚みが１ｍｍの表面シートを得た。
【０１５８】
中間シートは畝と溝などを賦形していないものを使用した。
表面シートと中間シートは、それぞれマスターバッジを混合して溶融押し出しした着色ポリプロピレン繊維で形成されたスパンボンド不織布（目付けが３０ｇ／ｍ^２）を使用した。
【０１５９】
吸収シートは、前記実施例１ないし５、１０、１１、比較例１ないし５と同じ着色していないものを用いた。
【０１６０】
裏面シートは、着色ポリエチレン樹脂で形成された目付けが２３．５ｇ／ｍ^２のポリエチレンフィルムを使用した。
【０１６１】
以下の実施例では、パンティーライナーが組み立てられる以前に、各シートの色相、明度および彩度を単独で測定し、さらにパンティーライナーが組み立てられた状態で、表面シート側から色相、明度および彩度を測定した。
【０１６２】
（実施例１２）
表面シートは、マンセル表色系の色相を７．８ＹＲ、明度を８．６、彩度を２．０とした。
【０１６３】
中間シートは、マンセル表色系の色相を６．５ＹＲ、明度を７．３、彩度を３．２とした。
【０１６４】
吸収シートは、マンセル表色系の色相が４．２Ｙ、明度が９．６、彩度が０．２であった。
【０１６５】
裏面シートは、マンセル表色系の色相を４．４ＹＲ、明度を７．７、彩度を３．３とした。
【０１６６】
パンティーライナー全体を、肌側表面から見たときベージュ色であり、マンセル表色系の色相は、６．４ＹＲ、明度が７．３、彩度が２．８であった。
【０１６７】
（実施例１３）
表面シートは、マンセル表色系の色相が１．３Ｒ、明度が９．４、彩度が１．０であった。
【０１６８】
前記中間シートは、マンセル表色系の色相が１．５Ｒ、明度が９．２、彩度が１．２であった。
【０１６９】
吸収シートは実施例１２と同じである。
前記裏面シートは、マンセル表色系の色相が５．９Ｒ、明度が９．５、彩度が０．８であった。
【０１７０】
その結果、肌側表面側から見たときにピンク色のパンティーライナーを得ることができた。肌側表面側から測定したときの、マンセル表色系の色相は０．２Ｒ、明度は９．２、彩度は２．２であった。
【０１７１】
実施例１２と実施例１３に関して、前記実施例１ないし１１および比較例１ないし５と同様にしておりものの隠遮性および経血の視認性のモニター評価を行った結果、いずれもその評価は「○」であった。
【０１７２】
【表３】

【０１７３】
【発明の効果】
本発明の吸収性物品は、色付きの下着に合わせて着用するのに適したものであり、肌側表面の上面から測定した明度をマンセル表色系の５．７〜９．３としたことにより、肌側表面に付着したおりものの隠遮性に優れ、またパンティーライナーを着用中に生理が始まった場合に、生理が始まったことを早期に知ることができる。よって、下着のクロッチの代替として使用するのに適したものとなる。
【図面の簡単な説明】
【図１】本発明の第１の実施の形態であるパンティーライナーを示す斜視図、
【図２】図１のＩＩ−ＩＩ線での断面図、
【図３】第２の実施の形態のパンティーライナーを示す斜視図、
【図４】図３のＩＶ−ＩＶ線で切断した半断面図、
【符号の説明】
１ パンティーライナー
１１ 裏面シート
１２ 吸収シート
１３ 中間シート
１４ 表面シート
１４ａ 液透過孔
３０ 液透過領域
４０ 肌側表面[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an absorbent article suitable for wearing according to the color of the underwear, and in particular, the colored absorbent which is excellent in concealment and visibility of menstrual blood and is suitable for use as a panty liner It relates to goods.
[0002]
[Prior art]
In addition to sanitary napkins, incontinence pads, etc., there are panty liners that are mainly used for catching vaginal discharge. The conventional panty liner absorbs a relatively large amount of vaginal discharge, and does not give discomfort to the genital area or the skin around the vulva, and prevents the vaginal discharge from leaking from the liner. It has become.
[0003]
On the other hand, in recent years, an increasing number of users wear panty liners even when there is a relatively small amount of cage. Such users are not wearing traditional panty liners to absorb large amounts of cages, but rather to prevent dirt on the underwear. In other words, people who want to keep their underwear clean, those who take good care of their underwear, or those who don't like to get dirty underwear are fond of using panty liners.
[0004]
Such people do not wear panty liners as conventional absorbent articles, but are primarily intended for use as crotch replacements for underwear or as crotches for replaceable underwear. In recent women's underwear, the brassiere and panties are designed to be unified, and it is common to purchase a pair of top and bottom or camisole and slip etc. at three points, but the crotch part of the panties is Since it is easy to get dirty, the panties, especially the crotch part, are often washed more carefully than other underwear, or using a detergent or a bleaching agent that removes dirt.
[0005]
Repeating this kind of washing makes it easier for the panties to be damaged compared to other underwear, so when buying a set of top or bottom or three or more sets of underwear, few women buy only one piece of panties. Absent. For such women, the panty liner is useful as an alternative to the crotch of the underwear or as a replaceable crotch of the underwear, and by using the panty liner regularly, the crotch part of the panty is less dirty, There is no need to purchase extra panties.
[0006]
Thus, in panty liners used as a substitute for underwear crotch or as a replaceable crotch, the wearer emphasizes the wear when wearing rather than the absorption function that has been regarded as important in the past. It is comfortable and has a sense of unity with the underwear. Therefore, a lighter, thinner and even smaller one is preferred.
[0007]
However, even a liner as an alternative to such an underwear crotch is generally white in color.
[0008]
However, many women who are particular about underwear or take care of underwear use different underwear depending on their mood and the action schedule (where they go, who they meet, etc.). With such women, the color of underwear is an important criterion when choosing underwear, and there are an increasing number of women who prefer to purchase underwear that is not white.
[0009]
As described above, many women who value the color of the underwear and take care of the underwear are dissatisfied with the white panty liner used as a substitute for the crotch. In other words, to use precious colored underwear carefully, the dissatisfaction of having to use the same white panty liner as the traditional sanitary goods and absorbent sheets for absorbent items, only the crotch part of the colored underwear will become white with the liner Dissatisfaction, dissatisfaction that dirt caused by urine or urine is easily noticeable from the surface of the white liner, and if the liner is attached to colored underwear, the color of the underwear and the liner will be different, so the liner will stand out and the liner Dirt on the surface is also conspicuous.
[0010]
In addition, when a white panty liner is used for colored underwear, there is concern that other people may know that the liner is worn when wearing the underwear in public. Such women want a panty liner of a color other than white.
[0011]
Conventionally, as panty liners of non-white color, panty liners that are catechin-containing and colored green, and panty liners that are colored on the absorption layer and the back sheet so that those colors can be seen through the top sheet are commercially available Has been.
[0012]
Further, in Patent Document 1 below, in a panty liner in which an absorption core is sandwiched between a top sheet directed to the skin of the wearer and a back sheet appearing on the surface facing the clothing side, the top sheet and the back surface A sheet made of a dark material such as black is disclosed.
[0013]
[Patent Document 1]
EP1108406
[0014]
[Problems to be solved by the invention]
Panty liners that are colored green with the above catechins use cotton spunlace colored on the surface sheet, but it is difficult to uniformly color the cotton spunlace, and the surface of the sheet is colored. Unevenness cannot be avoided.
[0015]
In order to obtain a colored cotton spunlace, cotton is entangled to form a sheet, and then the cotton appearing on the sheet surface is dyed or a color is printed on the sheet surface. However, since the surface of cotton is not smooth and absorbs water, it is difficult to uniformly color each fiber, and the degree of coloration differs between the part where the fiber is entangled and the other part. Cheap. It is also conceivable to color the cotton in advance and entangle the cotton to produce a sheet. However, when the fiber is entangled with a high-pressure water stream, the color of the fiber tends to fall off. In addition, when the treatment is performed with a low-pressure water flow so that the coloration of the fibers does not drop, unevenness occurs in the entanglement between the fibers, so that unevenness in color also occurs.
[0016]
In this way, a sheet colored with cotton spunlace is likely to have uneven color depending on its location in the same sheet, and moreover, the hue and brightness are likely to be different for each product, and it is difficult to maintain uniform quality. Therefore, it becomes unsuitable for use as a substitute for the crotch portion of the colored underwear.
[0017]
In addition, the panty liner that is colored on the absorbent layer and the back sheet so that those colors can be seen through from the top sheet will have a non-uniform color depending on the density of the fibers of the top sheet, Hue and lightness are different depending on the angle. As described above, the color differs depending on the surface portion of the panty liner, and the color is not uniform for each product.
[0018]
In addition, the absorbent article described in Patent Document 1 can exhibit a color that is integral with black underwear, and has a function of concealing bodily fluids excreted from the genital area (origin, menstrual blood, incontinence urine). Have.
[0019]
In this way, dark panty liners such as black are less conspicuous to the attached body fluid, and are effective in preventing contamination of the undergarment by absorbing and concealing the extraneous matter at times other than the menstrual period. On the other hand, when a minute amount of menstrual blood immediately after the start of menstruation adheres, there is a risk of concealing this. In this case, the wearer is delayed in noticing that the menstruation has started, and the replacement with a normal sanitary napkin is delayed. As a result of delay in noticing the start of menstruation, thin panty liners cannot absorb menstrual blood, and many menstrual blood adheres to the wearer's local area and its surroundings, causing discomfort and leaking from the panty liner In addition to underwear, there is a possibility of getting dirty even in clothes. In order to take care of colored underwear, the panty liner used to prevent it from becoming dirty causes the underwear and clothes to become dirty with menstrual blood.
[0020]
In order to prevent such a situation from occurring, the body fluid absorption capacity may be increased. However, in order to increase the absorption capacity, it is necessary to increase the thickness, weight, and area of the panty liner, and it approaches the sanitary napkin and the liner for absorption of conventional cages, and is inferior as a substitute for Crotch. become.
[0021]
In addition, the panty liner using the cotton spunlace colored in green and the panty liner that allows the color to be seen through the surface sheet have uneven color on the liner itself as described above. The color is different. Therefore, there is unevenness in the concealing function of what is in each product, or unevenness in visibility when menstrual blood adheres at the start of menstruation. Or even if it is the same panty liner, it will become easy to become what becomes uneven in the said concealment function and the said visibility depending on the place where a cage and menstrual blood adhere.
[0022]
The present invention is suitable for use according to the color of the underwear, the surface sheet appearing on the skin side surface is uniformly colored, and there is no unevenness in the color. It is an object to provide an absorbent article useful for use as a panty liner by a woman who takes care of underwear, and has a low possibility of missing a menstrual blood adhering at the beginning of the period.
[0023]
[Means for Solving the Problems]
The present invention is a colored absorbent article that is attached to the inner surface of an undergarment and can be matched to the color of the undergarment.
It has a skin side surface directed to the skin side of the wearer and a clothing side surface directed to the inner surface of the undergarment, and a surface sheet is provided on the skin side surface. A non-woven fabric formed of only one or more colored fibers of fibers and recycled fibers,
Under the surface sheet, Same color as the surface sheet One or more other nonwoven fabrics formed of colored fibers are provided as an intermediate sheet,
The lightness when the absorbent article is measured from the skin side surface is different from the lightness of the surface sheet alone, and the lightness is within the range of 5.7 to 9.3 of the Munsell color system. It is what.
[0024]
Further, the present invention is a colored absorbent article that is attached to the inner surface of the underwear and can be matched with the color of the underwear.
It has a skin side surface directed to the skin side of the wearer and a clothing side surface directed to the inner surface of the underwear, and a surface sheet is provided on the skin side surface, and this surface sheet is a colored synthetic resin sheet Yes,
Under the surface sheet, Same color as the surface sheet One or more other nonwoven fabrics formed of colored fibers are provided as an intermediate sheet,
The lightness when the absorbent article is measured from the skin side surface is different from the lightness of the surface sheet alone, and the lightness is within the range of 5.7 to 9.3 of the Munsell color system. It is what.
[0025]
Furthermore, the present invention is a colored absorbent article which is attached to the inner surface of the underwear and can be matched with the color of the underwear.
A skin-side surface directed toward the skin side of the wearer, and a clothing-side surface directed toward the inner surface of the undergarment, and a surface sheet is provided on the skin-side surface;
This surface sheet is a combination of a non-woven fabric formed with only one or more colored fibers of synthetic resin fibers, semi-synthetic fibers, and regenerated fibers, and a colored synthetic resin sheet,
Under the surface sheet, Same color as the surface sheet One or more other nonwoven fabrics formed of colored fibers are provided as an intermediate sheet,
The lightness when the absorbent article is measured from the skin side surface is different from the lightness of the surface sheet alone, and the lightness is within the range of 5.7 to 9.3 of the Munsell color system. It is what.
[0026]
The absorbent article of the present invention is formed of at least one of a nonwoven fabric formed of only one or more colored fibers of synthetic resin fibers, semi-synthetic fibers, and recycled fibers, and a colored synthetic resin sheet. Yes. When the nonwoven fabric and the synthetic resin sheet are used, the color appearing on the skin side surface is uniform, and the brightness when measured from the skin side surface is also uniform in the range of 5.7 to 9.3. Therefore, the sticking or absorbed on the skin side surface is inconspicuous, and has excellent concealment of the cage, and when menstruation starts during wearing, it adheres to or is absorbed by the skin side surface. The menstrual blood is immediately visible and it is easy to know early that the menstruation has started. Therefore, it is suitable for use as a crotch replacement for panties or for crotch replacement.
[0027]
Further, by selecting and wearing a panty liner of a similar or similar color to the color of the panties, the state of being attached to the crotch of the panties becomes inconspicuous, and a sense of unity with the crotch can be generated.
[0028]
The colored fiber of the present invention contains a colorant therein. Alternatively, the colored fiber has a surface coated with a colorant.
[0029]
When synthetic resin fibers, semi-synthetic fibers, and recycled fibers are used as described above, a colorant can be kneaded into the fibers. In addition, when the colorant is applied by printing from the surface of the nonwoven fabric, since the surface of each fiber is smooth, it is possible to uniformly apply the colorant to the fiber surface. Therefore, the surface sheet has no color unevenness and exhibits a stable color for each product.
[0030]
In addition, the colored synthetic resin sheet is a film formed of a synthetic resin kneaded with a colorant and has a liquid permeable hole, and is formed of the synthetic resin and has a relatively large liquid permeable hole. A net-like sheet or a foamed resin sheet having open cells capable of liquid permeation formed of the synthetic resin can be used. Alternatively, a colorant may be applied by printing on the surface of a film formed of a synthetic resin. In any case, the synthetic resin sheet can be uniformly colored.
[0031]
In particular, when using colored fibers kneaded as a colored fiber or using a synthetic resin film kneaded with a colorant, the amount of colorant contained in the synthetic resin and the type of colorant are selected. It becomes easy to adjust the hue and lightness of the colored sheet by combining or combining. Further, since the colorant does not come off the sheet, it is safe for the body and the underwear is not inadvertently soiled. In addition, since this absorbent article is suitable for use in accordance with the color of the underwear, there is an effect that it is inconspicuous that it is worn on the underwear, but there is a risk that the underwear may be washed while the absorbent article is worn. is there. However, when a sheet formed of a synthetic resin containing a colorant is used, the colorant is not likely to fall off even when washed inadvertently in this way, so that the underwear or the like is not soiled.
[0032]
Further, when a surface sheet is formed by a combination of a nonwoven fabric formed only with the colored fibers and a colored synthetic resin sheet, for example, only the central portion of the absorbent article is formed with the nonwoven fabric, and the side portions are formed. There can be a synthetic resin sheet, a synthetic resin film at the center and a nonwoven fabric at the side, or a laminate of the nonwoven fabric and the synthetic resin sheet.
[0034]
When the surface sheet and the intermediate sheet of similar colors or similar colors or the same color are overlapped, the hue and brightness of the entire absorbent article can be adjusted, and the brightness is optimal within the range of 5.7 to 9.3. Easy to adjust to things. For example, the brightness of the topsheet can be made light and the brightness can be made darker than that of the topsheet alone within the above range in a state where the topsheet and the intermediate sheet are overlapped. As a result, it is possible to improve the concealability of the one absorbed by the panty liner, while the surface has a light color appearance and the minute menstrual blood adhering to the surface sheet can be conspicuous.
[0035]
Also in this case, the colored fiber contained in the other nonwoven fabric contains one or more of synthetic resin fiber, semi-synthetic fiber, and regenerated fiber, and the fiber contains a colorant therein. Or the fibers forming the other nonwoven fabric include one or more of synthetic resin fibers, semi-synthetic fibers, and regenerated fibers, and the fibers are colored on the surface by printing or the like. Is applied.
[0036]
Further, in the present invention, a sheet formed of uncolored fibers is located under the top sheet, and the top sheet has a basis weight of 25 g / m. ² 75g / m above ² It is as follows.
[0037]
When the basis weight of the colored surface sheet is within the above range, even when there is an absorbent sheet or the like that exhibits the color of the white or natural fiber material itself, when viewed from the skin side surface side Is easily adjusted to the range of 5.7 to 9.3.
[0038]
This is the same even when a sheet formed of uncolored fibers is positioned under the top sheet and the intermediate sheet. In this case, the total weight of the top sheet and the intermediate sheet is also the same. 25g / m ² 75g / m above ² The following is preferable.
[0039]
Moreover, in the absorbent article of this invention, it is preferable that the brightness when the said surface sheet is measured independently from any one surface is in the range of 5.7-9.3 of the Munsell color system.
[0040]
When the brightness of the top sheet alone is set in the above range, it becomes easy to adjust the brightness when the entire absorbent article is viewed from the skin side surface to the range of 5.7 to 9.3. For example, even if the brightness of the sheet located under the top sheet is out of the above range, the surface weight of the top sheet is increased or a colored intermediate sheet is placed under the top sheet. The brightness viewed from the side surface can be set in the above range.
[0041]
As described above, the absorbent article of the present invention is a pan that is attached to the crotch portion of the underwear and absorbs mainly the scent. tea It will be suitable for use as a liner.
[0042]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view showing a panty liner which is a colored absorbent article according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the panty liner of FIG. 1 cut along the line II-II.
[0043]
The panty liner 1 shown in FIG. 1 and FIG. 2 is a thin absorbent article worn by a woman on the inner surface of a crotch portion of underwear (panty), and vaginal excretion fluid such as a cage secreted mainly by a woman. Used for the purpose of absorbing.
[0044]
This bread tea The liner is suitable for use by selecting, for example, a color similar to, or similar to, the color of the underwear according to the color of the underwear, and is colored at least when viewed from the skin side surface. The color can be visually recognized. Here, coloring in the present specification means a state in which another color that is not white is added, and for example, a state in which white is added using only a white pigment or the like is included in the concept of coloring. Absent.
[0045]
The panty liner 1 is used as a substitute for an underwear crotch or as a replaceable underwear crotch. In view of its use, the thickness dimension is preferably 0.25 mm or more and 5 mm or less, more preferably 0.5 mm or more and 3.5 mm or less. The mass is 0.5 g or more and 4 g or less, preferably 0.75 g or more and 3 g or less, and most preferably 1 g or more and 2 g or less. When thickness and mass are larger than the said range, it is too thick or too heavy, and it is easy to give a wearer an uncomfortable feeling as a crotch substitute for underwear. Further, if it is less than the above range, the absorption capacity of the cage and the like is reduced, and it is easy to give the wearer anxiety that things and the like are not absorbed, and if it is too thin, the production is difficult.
[0046]
In addition, in order to obtain a feeling as a part of the crotch of the underwear when attached to the crotch of the underwear, the size is 75 mm or more and 200 mm or less in the maximum vertical dimension from the front edge to the rear edge. , Preferably 90 mm or more and 170 mm or less, and most preferably 100 mm or more and 150 mm or less. Further, the width dimension in the horizontal direction from the right edge to the left edge, but when the planar shape is an hourglass shape as shown in FIG. - In the central part which bisects the liner in the longitudinal direction or the part where the width dimension in the vicinity thereof is the shortest, it is preferably 30 mm or more and 80 mm or less. More preferably, it is 40 mm or more and 60 mm or less, and most preferably 45 mm or more and 55 mm or less. Within this range, the excretory part of the body can be covered, and it is difficult to protrude from the crotch part of the underwear.
[0047]
The softness of the panty liner 1 as a whole is preferably 10 mg or more and 300 mg or less in terms of Gurley rigidity. Furthermore, it is preferably 30 mg or more and 250 mg or less, and most preferably 50 mg or more and 200 mg or less. When the range is exceeded, there is a risk of giving the wearer a rigid intuition when wearing the crotch portion of the underwear. If it is less than the above range, the panty liner may be twisted or misaligned when the crotch portion of the underwear is deformed. If it is less than the above range, it is too soft and difficult to produce.
[0048]
The Gurley rigidity value is a value measured according to a manual attached to the testing machine using “Gurley flexibility testing machine: model 311” manufactured by Yasuda Seiki Seisakusho. However, it is a measured value when the width dimension of the test piece is 25.4 mm.
[0049]
Moreover, when the nonwoven fabric appears on the skin side surface as in the following embodiment, the surface texture approximates that of the underwear fabric, which is preferable.
[0050]
A panty liner 1 shown in FIG. 1 has a right edge 2 and a left edge 3 extending in the vertical direction (Y direction in the figure), and a front edge 4 and a rear edge 5 extending in the width direction (the X direction in the figure). ing. The right edge 2 and the left edge 3 are concavely curved, the front edge 4 and the rear edge 5 are convexly curved, and the planar shape of the panty liner 1 is an hourglass shape.
[0051]
As shown in FIG. 2, the panty liner 1 includes a back sheet 11 having a liquid blocking function, an absorbent sheet 12 having a function of absorbing and holding liquid disposed on the back sheet 11, and the absorbent sheet 12. It is a laminate of a four sheet structure comprising an intermediate sheet 13 having a liquid permeable function and a top sheet 14 having a liquid permeable function arranged on the intermediate sheet 13.
[0052]
The planar shape and size of the back sheet 11, the absorbent sheet 12, the intermediate sheet 13, and the top sheet 14 are the same as the planar shape and size of the panty liner 1, respectively, and the sheets 11, 12, 13, Both side edges and front and rear edges of 14 coincide with each other at each edge 2, 3, 4, 5 of the panty liner 1.
[0053]
In the panty liner 1, the back side sheet 11, the absorbent sheet 12, the intermediate sheet 13, and the top sheet 14 are overlapped with each other from the right side edge 2, the left side edge 3, the front edge 4, and the rear edge 5. The round seal portion 20 is continuously formed with an interval of 1 to 4 mm inward. The round seal portion 20 has a width dimension of about 1 to 3 mm, and is joined by a hot melt adhesive or the like in a state where the four sheets are pressurized.
[0054]
A pair of pressure-sensitive adhesive layers 15 and 15 are applied to the surface of the back sheet 11 at a predetermined distance from a center line OO line that bisects the panty liner 1 in the width direction. As shown in FIG. 2, a release paper 16 is bonded to the outer surface of the pressure-sensitive adhesive layer 15. The wearer of the panty liner 1 peels the release paper 16 from the pressure-sensitive adhesive layer 15 to expose the pressure-sensitive adhesive layer 15, and places the pressure-sensitive adhesive layer 15 inside the crotch portion of the underwear. The panty liner 1 is applied and applied as a part (substitute) of the crotch portion of the underwear.
[0055]
As shown in FIG. 1, the surface sheet 14 is formed with a liquid permeation hole 14a in a region having a constant width dimension W1 in the width direction around the center line OO line and continuous in the vertical direction. Has been. A region where the liquid permeable hole 14 a is formed is a central liquid permeable region 30.
[0056]
Within the central liquid permeable region 30, the liquid permeable holes 14a are regularly arranged. Each liquid permeation hole 14a is circular. Both the arrangement pitch Py in the vertical direction and the arrangement pitch Px in the width direction of the liquid permeation holes 14a are 2 to 5 mm. Moreover, the opening diameter dimension of the liquid permeation hole 14a in the surface of the surface sheet 14 is about 0.5-3 mm. Further, the aperture area ratio of the liquid permeable holes 14a in the central liquid permeable region 30 is in the range of 8 to 20%.
[0057]
It is preferable that the width dimension W1 of the central liquid permeable region 30 in which the liquid permeable holes 14a are uniformly formed is in a range of 10 to 30 mm. When it is within the above range, the vaginal opening can be opposed to the central liquid permeable region 30 when worn on the body, and excretion fluid such as a cage can be received mainly by the central liquid permeable region 30.
[0058]
Thus, when the surface sheet 14 is subjected to mechanical secondary processing to form a large number of liquid permeable holes 14a, the skin side surface of the panty liner 1 approaches the texture of the crotch portion of the underwear (panty), It becomes easier to get a sense of unity with the crotch part of the underwear. In addition, the mechanical secondary processing of the topsheet 14 may be formed with ridges and grooves as in the intermediate sheet 13 described later, or a large number of pin embosses on the topsheet 14. The part may be processed. The surface sheet 14 formed with ridges and grooves is not only soft against the body, but also has an appearance as a material close to cloth, and is suitable as a substitute for the crotch portion of underwear.
[0059]
The thickness of the top sheet 14 is preferably in the range of 0.05 to 2 mm, more preferably 0.1 to 1 mm, before the secondary machining such as the groove is performed. The most preferable range is 0.23 to 0.5 mm. Further, the bending resistance when the top sheet 14 is measured alone is preferably 85 mm or less when measured by the 6.19.1 A method (45 ° cantilever method) of JIS-L1096 (1990). More preferably, it is 80 mm or less, Most preferably, it is 75 mm or less. The lower limit is 0 mm. When the bending resistance exceeds the above range, it is too hard as a substitute for the crotch portion of the underwear. Moreover, if it is in the said range, it will become easy for a wearer to feel a sense of unity with the crotch part of underwear.
[0060]
The intermediate sheet 13 is formed with ridges and grooves extending in the vertical direction. The ridges and grooves are formed so that the distance between the apexes of the adjacent ridges is about 1 to 3 mm, and from the back surface facing the absorbent sheet 12 of the intermediate sheet 13, it faces the top sheet 14 of the ridge portion. The thickness dimension up to the top is 0.5 to 1.5 mm. When the groove is formed in the intermediate sheet 13 in this way, the feel when worn becomes soft.
[0061]
In the panty liner, the surface of the surface sheet 14 is the skin side surface 40, and excretion fluid such as urine excreted from the wearer's vaginal opening and given to the skin side surface 40 is captured by the surface sheet 14. Later, it mainly passes through the liquid permeation hole 14a, penetrates through the intermediate sheet 13, and is absorbed and held by the absorbent sheet 12. And the thing absorbed and hold | maintained at the said absorption sheet 12 does not ooze out to underwear etc. with the said back surface sheet 11 which has a liquid interruption | blocking function.
[0062]
The panty liner 1 has a non-white color when viewed from the skin side surface 40 side. This color is, for example, pink, light blue, beige, etc., and it is similar or similar to or similar to the color of underwear that women generally prefer, so that the panty liner 1 that matches this color can be selected according to the color of the underwear. It has become. And the brightness of the Munsell color system when measuring the surface sheet 14 from any one surface is in the range of 5.7 to 9.3.
[0063]
Furthermore, the brightness of the Munsell color system when measured from the skin-side surface 40 side in a dry state in which the panty liner 1 is assembled and no excretory fluid such as a cage is given is also 5.7-9. It is adjusted to be 3.
[0064]
In this embodiment, a part of the skin side surface 40 is a central liquid permeable region 30 having the liquid permeable holes 14a. In this case, the brightness of the surface sheet 14 measured alone and the brightness of the assembled state as the panty liner 1 are other than the portion of the central liquid permeable region 30 and the central liquid permeable region 30 on the skin side surface 40. In the portion, both are in the range of 5.7 to 9.3. In addition, even when a flange portion and a groove portion are formed on the surface sheet, or when a large number of pin embossed portions are formed, measurement was performed in the region where the flange portion and the groove portion were formed and the region where the pin embossed portion was formed. The brightness is within the above range.
[0065]
When the brightness of the Munsell color system is within the range of 5.7 to 9.3 when the panty liner 1 is viewed from the skin side surface as described above, the top sheet 14 in a state where no excretory liquid is attached. The difference between the lightness and the lightness of the glue attached to the surface sheet 14 and penetrating into the surface sheet 14 becomes small, and the color of the cage becomes inconspicuous. On the other hand, when menstruation starts while the panty liner 1 is worn, the brightness of the surface sheet 14 in a state where no excretory liquid is adhered, and the time when the surface sheet 14 adheres to or penetrates the surface sheet 14. Since the difference with the lightness of blood is large, menstrual blood can be immediately recognized.
[0066]
As described above, the dirt attached to the top sheet 14 positioned on the outermost surface of the panty liner 1 is inconspicuous, so that the dirt on the skin side surface 40 of the panty liner 1 becomes inconspicuous. Moreover, even when minute menstrual blood adheres to the surface sheet 14, it becomes easy to recognize this. In addition, in a state where the sheets constituting the panty liner 1 are overlapped, the brightness when viewed from the skin side surface 40 is within the above range, and therefore the absorbent absorbed in the absorbent sheet 12 through the intermediate sheet 13 Can be concealed, and even when menstrual blood reaches the intermediate sheet 13 or the absorbent sheet 12, it can be made conspicuous.
[0067]
Thus, while using the surface sheet 14 colored so that it may become predetermined | prescribed brightness, by selecting the combination with each sheet | seat under it, the brightness when the panty liner 1 whole is seen from the skin side surface 40 is obtained. It is possible to adjust within the said range.
[0068]
In the panty liner 1 having the structure shown in FIG. 1 and FIG. 2, the top sheet 14 and the intermediate sheet 13 are colored, the absorbent sheet 12 is not colored, and the absorbent sheet 12 is white or a natural color of fibers. .
[0069]
Here, when the colored top sheet 14 and the colored intermediate sheet 13 are overlapped and the basis weight of the stacked state is slightly increased, Bread The brightness when the tea liner 1 is viewed from the skin-side surface 40 side can be set to the dark color side having a lower grade than the brightness when the top sheet 14 is viewed alone. Therefore, the top sheet 14 itself can be made a relatively bright color, and the panty liner as a whole can be made slightly darker. In this case, it is possible to enhance the effect of concealing the urine or the like that has penetrated into the intermediate sheet 13 or the absorbent sheet 12. Further, by setting the brightness of the entire panty liner in the above range, menstrual blood that has penetrated inside can be conspicuous, but since the surface sheet 14 is particularly light in color, menstrual blood adhering to the surface sheet 14 is further reduced. Can stand out. Therefore, it becomes possible to quickly know the start of menstruation.
[0070]
Also, surface When the sheet 14 is thinned or the total weight of the top sheet 14 and the intermediate sheet 13 is made slightly smaller, the absorbent sheet 12 having a white color or a natural color of the fiber located thereunder is seen through the top sheet 14. It becomes easier to see. In this case, by setting the brightness of the top sheet 14 to a slightly darker side within the above-mentioned preferred range, the brightness when the entire panty liner 1 is viewed from the skin side surface 40 side is within the above range and slightly lighter side. It becomes possible to adjust. As a result, it is possible to make inconspicuous a thing adhering to the top sheet 14 or penetrating the top sheet 14, and making the menstrual blood stand out when the menstrual blood is absorbed by the absorbent sheet 12.
[0071]
Thus, the brightness of the top sheet 14 is set to the above range, and whether or not one or more intermediate sheets 13 are combined is selected, and the basis weight of the top sheet 14 and the total basis weight of the top sheet 14 and the intermediate sheet 13 are adjusted. Further, by selecting whether or not the sheet such as the absorbent sheet 12 positioned below is colored other than white, the hue and brightness of the top sheet 14, the hue of the entire panty liner 1 and It becomes easy to set the brightness and any.
[0072]
This panty liner is not noticeable for dirt such as cages, and the wearer can know at an early stage that menstruation has started, so the wearer can replace the panty liner with a sanitary napkin early after the start of menstruation. Can be performed. Therefore, it becomes easy to prevent menstrual blood from exceeding the absorption and holding amount of the panty liner 1 and leaking menstrual blood to stain clothes and the like.
[0073]
In this specification, the “Munsell color system” means a color system announced by the Color Measurement Committee of the American Optical Society after correcting the color system created by Alpert H. Mansell.
[0074]
The Munsell color system represents a color by three attributes of hue, brightness, and saturation. The “hue” means an attribute of a color appearing in a light spectrum. In the Munsell color system, red (R), yellow (Y), green (G), blue (B), and purple (P). It is based on 5 hues and is further represented by 10 hues with yellow-red (YR), yellow-green (GY), blue-green (BG), blue-violet (PB), and magenta (RP) in the middle. Within each hue, the grade is expressed with an equal rate so that the maximum is 10. The “lightness” means a visual sense attribute indicating the magnitude of the luminous reflectance (brightness-related reflectance) of the object surface. In the Munsell color system, black that completely absorbs light is zero. The white that completely reflects the light is represented by 10 and expressed at an equal rate. The “saturation” means the degree of vividness of the color. In the Munsell color system, the achromatic color is set to 0, and the numerical value is increased at a constant rate as the vividness increases.
[0075]
Here, the similar color in this specification means a range in which the grade of hue is ± 5. For example, the similar color for the hue 5B is in the range of 10B to 10BG. A similar color means a range of hue grades of ± 2.5 or less. For example, similar colors for 5YR range from 2.5YR to 7.5YR.
[0076]
The hue, brightness, and saturation can be measured by a measuring device. In the present specification, the hue, brightness, and saturation are values measured by a color difference meter “CR-300” manufactured by Minolta Co., Ltd. I mean.
[0077]
In the panty liner 1 of this embodiment, not only the top sheet 14 and the intermediate sheet 13 but also the back sheet 11 is colored in a similar or similar color to the top sheet 14.
[0078]
If the top sheet 14 and the back sheet 11 are similar colors or similar colors (preferably the same color), both the skin side surface and the clothing side surface of the panty liner 1 can be matched to the color of the underwear, and the crotch of the underwear When attached to the part, it is possible to create a sense of unity with the crotch part of the underwear while being visually observed. Moreover, even when a part of the panty liner 1 protrudes from the crotch portion of the shorts, it is difficult to notice that the panty liner is worn.
[0079]
In order to make the brightness when the panty liner 1 is measured from the skin side surface side within the range of 5.7 to 9.3, in the case of pink, in the range of 5RP to 5R, in the case of light blue, In the case of 5BG to 10B and beige, it is preferable that the range is 5YR to 10YR (all of the above ranges are clockwise ranges of the Munsell hue ring). If the hue is within the above range, it is easy to set the lightness within the range of 5.7 to 9.3.
[0080]
The top sheet 14 and the intermediate sheet 13 are formed of, for example, a spunbond nonwoven fabric. The surface sheet 14 is a spunbond nonwoven fabric formed only of colored synthetic resin fibers, and the intermediate sheet 13 is a spunbond nonwoven fabric including synthetic fibers colored at least partially.
[0081]
The colored synthetic resin fiber is formed by using a raw material in which a pellet of synthetic resin such as polypropylene resin and a masterbatch composed of a coloring agent and a synthetic resin such as polypropylene resin are mixed and melt-extruded. As a result, a synthetic resin fiber kneaded with the colorant can be obtained, and by using this synthetic resin fiber, a spunbond nonwoven fabric in which each portion of the sheet surface is uniformly colored can be obtained. Moreover, the nonwoven fabric using the colored synthetic resin fiber is not limited to the spunbond nonwoven fabric, and may be other types of nonwoven fabric such as a spunlace nonwoven fabric.
[0082]
As the colored fibers forming the nonwoven fabric, in addition to the polypropylene resin fibers, those obtained by kneading a colorant into polyethylene resin fibers or polyethylene terephthalate resin fibers can be used. Alternatively, the colorant may be kneaded into semi-synthetic fibers such as acetate or regenerated fibers such as rayon. Or in the state which formed the nonwoven fabric, the coloring agent was made to adhere to the surface by a printing process, and the coloring agent was apply | coated to the surface of the said synthetic resin fiber, a semi-synthetic fiber, and a reproduction | regeneration fiber.
[0083]
The fibers kneaded with the colorant as described above are uniformly colored that cannot be realized with natural fibers. In addition, since the surface of the synthetic resin fiber, semi-synthetic fiber, and regenerated fiber is not fibrillated, a colorant can be uniformly applied to the fiber surface even by the printing process. This is superior to that obtained by applying a colorant to natural fibers. Accordingly, these colored fibers are stable in color in the individual fibers, and by using any one of the colored fibers or combining the colored fibers to form a nonwoven fabric, a non-uniform color nonwoven fabric can be obtained. Can do.
[0084]
Further, at least one of the top sheet 14 and the intermediate sheet 13 has two nonwoven fabrics partially heat-sealed or bonded with an adhesive. In this case, the layer facing the skin may be formed of a colored nonwoven fabric, and the layer facing the clothing may be formed of uncolored fibers. Alternatively, it is a multilayer structure in which three nonwoven fabrics are joined as described above, each layer facing the skin side and the clothing side is a nonwoven fabric formed with colored fibers, and the intermediate layer is made of uncolored fibers. It may be formed.
[0085]
Alternatively, as the surface sheet 14, a synthetic resin film such as a polyethylene resin or a polypropylene resin in which a colorant is kneaded by melting and extruding a material using a master badge containing a colorant as in the production of the synthetic resin fiber. Then, the colored synthetic resin film may be subjected to pore opening treatment. Thus, the surface sheet 14 kneaded with the colorant can be made stable with no color unevenness and no color fading.
[0086]
The surface sheet 14 may be a net-like sheet having relatively large liquid permeation holes made of the synthetic resin containing the colorant, and liquid-permeable open cells formed of the synthetic resin may be used. It may be a foamed resin sheet. In addition, when using the synthetic resin film which has an opening, and the said net-like sheet | seat as the surface sheet 14, since the color of the sheet | seat under it is easy to see from a hole, the colored intermediate sheet is arrange | positioned under the surface sheet 14. It is preferable to do. Further, when the surface sheet 14 is formed of a nonwoven fabric, the surface of the surface sheet 14 is preferable because it produces a texture similar to that of an underwear cloth, but the one using the synthetic resin film or the net-like sheet is a low-cost material. Also, there is an advantage in that the durability of the skin side surface 40 is increased.
[0087]
In addition, the colored aperture resin film or the net-like sheet and a nonwoven fabric formed of colored fibers are joined to each other, or a colored resin film and a nonwoven fabric formed of uncolored fibers are used. You may use what joined.
[0088]
Moreover, as the surface sheet 14, what coated the colorant on the surface of the synthetic resin film at the printing process, and performed the aperture | opening process after that can be used.
[0089]
Here, as a printing method for the nonwoven fabric or the synthetic resin film, there are flexo, gravure, ink jet printing, and the like, and it is preferable to use flexo printing. Flexographic printing is highly safe for the body because no organic solvent is used. On the other hand, gravure printing is easy to give tension to a nonwoven fabric or a resin film, and it is difficult to make uniform and stable printing. On the other hand, flexographic printing is performed by placing the nonwoven fabric or resin film on a drum, so that the tension applied to the nonwoven fabric is weak, and stable ink fixing without deviation is possible. Also, printing methods other than flexo and gravure are not suitable for mass production due to high costs. In addition, when printing a color on a nonwoven fabric or a resin film, it is preferable to use the edible ink for foods with high safety | security, for example.
[0090]
Moreover, what combined the said colored nonwoven fabric and the colored synthetic resin sheet as the surface sheet 14 can be used. For example, the central portion of the surface sheet 14 is formed of a nonwoven fabric, and both the left and right sides and front and rear end portions are synthetic resin sheets. It may be the one. Or what laminated | stacked the nonwoven fabric formed with the colored fiber under the said colored synthetic resin sheet | seat can also be used.
[0091]
The back sheet 11 is a film formed of a colored synthetic resin, for example, a colored polyethylene resin. This resin film is formed by melting and extruding a resin obtained by mixing a masterbatch containing a colorant and a resin such as polyethylene into a synthetic resin such as polyethylene as described above. Moreover, it can replace with the said material and can add the filler etc. to the film formed from the colored polyethylene resin, and can use what extended | stretched and formed the fine hole and provided moisture permeability. Furthermore, it can replace with said each material and can use the sheet | seat laminated | stacked in the order of the spunbond nonwoven fabric / melt-blown nonwoven fabric / spunbond nonwoven fabric, and at least one layer of nonwoven fabric formed of colored synthetic resin fibers. Moreover, you may use the white thing which does not use coloring agents other than white as the back surface sheet 11, or a transparent thing.
[0092]
As the absorbent sheet 12, for example, rayon which is a regenerated cellulose fiber, and a spunlace nonwoven fabric composed of polyethylene terephthalate fiber and polypropylene fiber are used. The fibers constituting the absorbent sheet 12 are white or natural colors exhibited by the respective fibers.
[0093]
Moreover, as the absorbent sheet 12, it is also possible to use an air laid nonwoven fabric containing pulp, the air laid and super absorbent polymer, pulp and super absorbent polymer, or a super absorbent polymer sheet. However, if a superabsorbent polymer is used, it becomes easy to absorb menstrual blood, so that there is a possibility that the menstrual blood is given to the panty liner 1 is overlooked. In addition, the panty liner 1 is stiff and the wearing feeling as a substitute for the crotch portion of the underwear is slightly worse. In order to reduce the stiff feeling, it is necessary to use a material that relieves the stiff feeling such as the pulp, so that the panty liner becomes thick and becomes less suitable as a substitute for the crotch portion. Further, when the underwear is washed by forgetting to remove the panty liner, the superabsorbent polymer absorbs the washing water, which may cause trouble during washing.
[0094]
In order for the panty liner 1 to exhibit a predetermined hue and brightness, as long as the surface sheet 11 is at least colored as described above, the colorant is kneaded as described above. If synthetic resin, synthetic resin fiber, semi-synthetic fiber, or recycled fiber is used, the hue and lightness can be easily controlled by selecting the amount and type of colorant. In addition, since the colorant does not easily fall off, there is a sense of security for the body, and problems such as inadvertently dropping the colorant and discoloring the underwear do not occur.
[0095]
Moreover, a water-decomposable and biodegradable panty liner can be formed by forming the top sheet 14 and the back sheet 11 with colored recycled fibers. When configured in this way, when the used panty liner is poured into a flush toilet, the fibers constituting the water-degradable sheet are biodegraded after being dispersed in the water, so that the functions of the septic tank and the sewer are not impaired. It becomes possible to prevent contamination.
[0096]
Here, the “biodegradable fiber” in this specification means a fiber that is decomposed in vivo or by the action of microorganisms. In addition, “water decomposability” in the present specification means a property that fibers constituting the sheet are dispersed in a dispersed manner when the sheet is placed in water.
[0097]
As mentioned above, although the said panty liner 1 was demonstrated as a thing of 4 layer structure of the surface sheet 14, the intermediate sheet 13, the absorption sheet 12, and the back surface sheet 11, this invention is not limited to this, The said skin side surface As long as the brightness of the Munsell color system measured from the above is in the range of 5.7 to 9.3, other structures can be used. For example, Above Two or more intermediate sheets may be provided.
[0098]
Moreover, although the liquid permeable hole 14a was formed in the said surface sheet 14, and the center liquid permeable area | region 30 was formed was demonstrated, this invention is not limited to this, The surface sheet which is a skin side surface If the brightness of the Munsell color system measured from the side is in the range of 5.7 to 9.3, the liquid permeation hole 14a may not be formed. Moreover, as long as the lightness of the Munsell color system measured as described above is within the above range, the surface sheet 14 may be subjected to other mechanical secondary processing such as a groove.
[0099]
In addition, if the lightness of the Munsell color system is within the above range, no ridges may be formed in the intermediate sheet 13.
[0100]
FIG. 3 is a perspective view of a panty liner 1A of an absorbent article according to a second embodiment of the present invention, and FIG. 4 is a half sectional view of the panty liner 1A cut along line IV-IV.
[0101]
The panty liner 1A is thin like the panty liner 1 and is used by being attached to the crotch portion of the undergarment mainly for the purpose of absorbing sag. 3 and 4, the same structural parts as those of the panty liner 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
[0102]
The panty liner 1A shown in FIG. 3 and FIG. 4 has a right edge 2 and a left edge 3 at a position spaced from both the front edge 4 and the rear edge 5, for example, at an intermediate position that bisects in the vertical direction. Wing portions 10 and 10 are formed so as to protrude to the left and right sides. As shown in FIG. 4, the wing portions 10, 10 have a back sheet 11 and a top sheet 14 overlapped and bonded with a hot melt adhesive or the like. In the wing portions 10 and 10, pressure-sensitive adhesive layers 15 a and 15 a are provided on the outer surface of the back sheet 11, respectively.
[0103]
The panty liner 1A is adhered to the inside of the crotch portion of the underwear by the pressure-sensitive adhesive layer 15, and the wing portions 10, 10 are bent from both side edges of the crotch portion toward the outer surface, and the wing portions 10, 10 Is bonded to the outer surface of the undergarment via the pressure-sensitive adhesive layer 15a. Thereby, the panty liner 1A can be reliably fixed to the underwear.
[0104]
At least the top sheet 14 is colored, and when the wings 10 and 10 are viewed from the top sheet 14 side, the wings 10 and 10 are underwear. It can be matched to the color, and wearing the panty liner is less noticeable.
[0105]
【Example】
The following examples and comparative examples were evaluated for the hiding property of the cage and the visibility of menstrual blood.
<Examples 1 to 11 and Comparative Examples 1 to 5>
In Examples 1 to 11 and Comparative Examples 1 to 5 shown in Table 1, the first intermediate sheet and the second intermediate sheet are selectively used below the surface sheet. The first intermediate sheet and the second intermediate sheet used were not subjected to uneven processing such as ridges. Further, unless specifically explained, those sheets in which no liquid permeation holes were formed were used.
[0106]
In Examples 1 to 11, the following four types of spunbond nonwoven fabrics are used in combination as the top sheet, the first intermediate sheet, and the second intermediate sheet.
[0107]
Table 2 shows the hue, brightness, and saturation when each of the four types of spunbonded nonwoven fabrics is measured independently from the skin side surface side. In the following, hue, brightness, and saturation are average values of values measured three times with a color difference meter “CR-300” manufactured by Minolta Co., Ltd.
[0108]
The pink spunbonded nonwoven fabric comprises a pink masterbatch (40% by mass of titanium oxide, 0.365% by mass of quinacridone red, 0.135% by mass of condensed azo red, 42.8% by mass of PP resin, dispersant 16 0.7 mass%) and a fiber (2.2 dtex) obtained by extruding a polypropylene (PP) resin mixed at a ratio of 1.6 mass% with a basis weight of 25 g / m. ² It is. The hue was 5.8RP, the lightness was 8.8, and the saturation was 3.3.
[0109]
The light blue spunbond nonwoven fabric is 1.6% by weight of a light blue master batch (6.12% by mass of titanium oxide, 3.32% by mass of copper phthalocyanine blue, 1.50% by mass of quinacridone, 89.06% by mass of PP resin). Made of a fiber (2.2 dtex) obtained by extruding a polypropylene resin mixed at a ratio of 25 g / m ² It was. The hue was 5.0 PB, the lightness was 8.9, and the saturation was 1.1.
[0110]
A beige colored spunbonded non-woven fabric is a beige colored masterbatch (16.65% titanium oxide, 7.17% yellow iron oxide, 3.09% red iron oxide, 0.75% carbon black, PP resin 72.34% by mass) is a fiber (2.2 dtex) obtained by extruding a PP resin mixed at a rate of 1.7% by mass.
[0111]
The basis weight is 25g / m ² No. 1 had a hue of 6.6 YR, a lightness of 7.6, and a saturation of 4.4. The basis weight is 30g / m ² No. 1 had a hue of 5.2YR, a lightness of 6.5, and a saturation of 3.6.
[0112]
Example 1
As a surface sheet and a first intermediate sheet, a pink spunbond nonwoven fabric (weight per unit area: 25 g / m) ² )It was used.
[0113]
As an absorbent sheet, 55% by mass of viscose rayon fiber having a fiber length of 1.39 dtex and a fiber length of 44 mm, 30% by mass of polyethylene terephthalate (PET) fiber having a fiber length of 1.44 dtex and 38 mm, polypropylene (PP) having a fiber length of 1.67 dtex and a fiber length of 45 mm Spunlace nonwoven fabric obtained by mixing 15% by mass of fiber and hydroentangling (weight per unit: 38 g / m ² )It was used. The material of this absorbent sheet does not use a colorant of a different color from white, viscose rayon uses a natural color at the time of manufacture, and PET fibers and PP fibers are white ones containing an inorganic filler. It was used. The hue, brightness, and saturation when this absorbent sheet is measured alone are as shown in Examples 12 and 13. The same absorbent sheet was used in all of the following Examples and Comparative Examples.
[0114]
22.5 g / m as back sheet ² White polyethylene film was used. The same back sheet was used in Examples 1 to 11 and Comparative Examples 1 to 5.
[0115]
Then, an absorbent sheet, the first intermediate sheet, and the top sheet are sequentially laminated on the back sheet, and an edge of each sheet is joined with a hot-melt adhesive to create an absorbent article. Was taken as Example 1.
[0116]
The brightness of the Munsell color system measured in Example 1 from the skin side surface was 9.00.
[0117]
(Example 2)
The basis weight is 25g / m ² The pink spunbonded nonwoven fabric of 3 layers was used as a second intermediate sheet, a first intermediate sheet, and a surface sheet, each of which was positioned on the absorbent sheet.
The lightness of the Munsell color system measured from the skin side surface was 8.70.
[0118]
(Example 3)
The basis weight is 25g / m ² The light blue spunbond nonwoven fabric was used as the first intermediate sheet and the top sheet. The lightness of the Munsell color system measured from the skin side surface was 9.00.
[0119]
(Example 4)
A second intermediate sheet, a first intermediate sheet, and a top sheet were formed from the same light blue spunbond nonwoven fabric as in Example 3. The lightness of the Munsell color system measured from the skin side surface was 8.70.
[0120]
(Example 5)
The basis weight is 25g / m ² Beige colored spunbond nonwoven fabric was used as the first intermediate sheet and the top sheet. The lightness of the Munsell color system measured from the skin side surface was 7.00.
[0121]
( Reference example 1 )
An absorbent article having a structure excluding the first intermediate sheet from Example 1 was prepared. Reference example 1 It was. The lightness of the Munsell color system measured from the skin side surface was 9.10.
[0122]
( Reference example 2 )
An absorbent article having a structure excluding the first intermediate sheet from Example 3 was prepared. Reference example 2 It was. The lightness of the Munsell color system measured from the skin side surface was 9.30.
[0123]
( Reference example 3 )
An absorbent article having a structure excluding the first intermediate sheet from Example 5 was prepared. Reference example 3 It was. The lightness of the Munsell color system measured from the skin side surface was 8.00.
[0124]
( Reference example 4 )
The basis weight is 30g / m ² Beige colored spunbond nonwoven fabric was used for the topsheet. The lightness of the Munsell color system measured from the skin side surface was 7.25.
[0125]
(Example 10)
The basis weight is 30g / m ² Beige colored spunbond nonwoven fabric was used for the first intermediate sheet and the top sheet. The lightness of the Munsell color system measured from the skin side surface was 5.90.
[0126]
Example 11
The basis weight is 25g / m ² The beige colored spunbond nonwoven fabric was used for the second intermediate sheet, the first intermediate sheet and the top sheet. The lightness of the Munsell color system measured from the skin side surface was 5.70.
[0127]
(Comparative Example 1)
The basis weight is 25g / m ² A beige-colored spunbond nonwoven fabric is used to form a surface sheet with a basis weight of 30 g / m ² Beige colored spunbond nonwoven fabric was used for the first intermediate sheet and the second intermediate sheet, and this was designated as Comparative Example 1.
The lightness of the Munsell color system measured from the skin side surface was 5.50.
[0128]
(Comparative Example 2)
A fiber obtained by extruding a PP resin in which a black masterbatch (carbon black 18.20 mass%, PP resin 54.40 mass%, wax 27.30 mass%) is mixed at a ratio of 4.0 mass% (2 .2 dtex) spunbonded nonwoven fabric (weight per unit area 25 g / m) ² ) Was used as a top sheet, and this was designated as Comparative Example 2.
The lightness of the Munsell color system was 3.50.
[0129]
(Comparative Example 3)
A structure having the same structure as that of Comparative Example 2 and having a liquid permeable hole formed on the top sheet was referred to as Comparative Example 3.
[0130]
The liquid perforation hole was provided in a region having a width dimension of 20 mm in the direction crossing the center line and extending over the entire length in the longitudinal direction with the center line divided into two in the width direction as the center. The arrangement pitch in the longitudinal direction and the width direction was 3 mm, and the diameter of the liquid permeation hole at the opening end on the surface side of the surface sheet was 1 mm.
The lightness of the Munsell color system was 4.05.
[0131]
(Comparative Example 4)
While using the surface sheet of the comparative example 2, the same nonwoven fabric as this surface sheet was used as a 1st intermediate sheet, and this was set as the comparative example 4.
The lightness of the Munsell color system was 2.10.
[0132]
(Comparative Example 5)
White spunbond nonwoven fabric (weight per unit area: 25 g / m) made of fibers (2.2 dtex) obtained by extruding PP resin mixed with 0.5% by mass of titanium oxide ² ) Was used as a top sheet, and this was designated as Comparative Example 5.
The lightness of the Munsell color system was 9.60.
[0133]
<Evaluation of concealment of cages and visibility of menstrual blood>
(1) Lightness measurement
In each of the above Examples and Comparative Examples, the brightness was measured from the liquid receiving surface in the initial state before the liquid was dropped.
[0134]
(2) Concealment evaluation of pseudo-origin
Using the color difference meter, the color difference between the color difference reference color and the skin side surface of each example and comparative example was measured as a Hunter Δ (Lab) value. The initial color difference measurement value when the liquid is not dripped is ΔE ₀ And
[0135]
Next, 0.5 ml of distilled water was dropped on the upper surface of the top sheet of each of the examples and comparative examples as a simulated container, and the color difference from the color difference reference color was measured. This measured value is ₁ And
[0136]
The initial color difference measurement value ΔE before dropping the simulated cage ₀ And the color difference measured value ΔE after dropping. ₁ Absolute value of difference from ₀ -ΔE ₁ | Is defined as a concealing effect on the pseudo-cage and is shown in Table 1.
[0137]
The absolute value | ΔE ₀ -ΔE ₁ The smaller the value of |, the higher the concealment effect for the pseudo cage. Referring to the following (3) results of monitor evaluation in Table 1, the absolute value | ΔE ₀ -ΔE ₁ | Is preferably 10 or less, and a preferred value based on Examples is 9.12 or less.
[0138]
(3) Monitor evaluation of concealment of pseudo cage
0.5 ml of the simulated cage was dropped on the upper surface of the top sheet of each of the examples and comparative examples, and 10 monitors were visually inspected for hiding and shielding.
[0139]
The brightness of the determination place was 76 lux, and the average visual acuity (including corrected visual acuity) of the monitor was 1.0.
[0140]
Judgment was carried out according to the following criteria, with an evaluation of five levels: “very favorable”, “slightly preferable”, “cannot say either”, “not very preferable”, and “not preferable”.
[0141]
・ When 8 or more monitors have selected “Slightly preferred” or “Very favorable” for the shielding property: ○
・ When there are 6 or more monitors that have selected “Slightly preferred” or “Very favorable” for the shielding property: △
・ Other than the above ○ or △: ×
[0142]
(4) Evaluation of discrimination of pseudomenstrual blood
The color difference from the color difference reference color was measured in the same manner as in the concealment evaluation in (2) above. The color difference ΔE of the skin side surface of each Example and Comparative Example before the simulated menstrual blood is dropped ₀ And the color difference after dropping 0.5 ml of simulated menstrual blood on the top surface of each of the examples and comparative examples is ΔE ₁ And the absolute value of the difference between the color differences | ΔE ₀ -ΔE ₁ | Is shown in Table 1 as an evaluation of pseudomenstrual blood discrimination.
[0143]
Simulated menstrual blood was prepared by dissolving 8 g of sodium carboxymethyl cellulose, 80 g of glycerin, 4 g of sodium hydrogen carbonate, 8 g of red No. 102, 2 g of red No. 2 and 2 g of yellow No. 5 in 1 liter of distilled water.
The absolute value | ΔE ₀ -ΔE ₁ The greater the value of |, the higher the discrimination effect of pseudo menstrual blood. Referring to the following (5) monitor evaluation results in Table 1, the absolute value | ΔE ₀ -ΔE ₁ | Is preferably 43 or more, and a preferred value based on the example is 44.38 or more.
[0144]
(5) Monitor evaluation of discrimination of pseudomenstrual blood
0.5 ml of the simulated menstrual blood was dropped on the upper surface of the top sheet of each of the examples and comparative examples, and the visibility was judged visually by 10 monitors.
[0145]
The brightness of the determination place was 76 lux, and the average visual acuity (including corrected visual acuity) of the monitor was 1.0.
[0146]
The determination was made according to the following criteria based on the following five criteria: “easy to see”, “visible”, “cannot say either”, “difficult to see”, and “not visible”.
[0147]
・ When 8 or more monitors have selected “Visible” or “Easy to see”: ○
・ If there are 6 or more monitors that select “Visible” or “Easy to see”: △
・ Other than the above ○ or △: ×
[0148]
<Result>
Table 1 shows the configuration of each example and each comparative example, and the results of the evaluation of concealment and evaluation of menstrual blood visibility.
[0149]
From Table 1, it is understood that the lightness of the Munsell color system needs to be in the range of 5.7 to 9.3 in order to improve both the hiding property of the cage and the visibility of menstrual blood.
[0150]
In addition, when a surface sheet or each intermediate sheet having a lightness in the range of 5.7 to 9.3 is used, and a non-colored absorbent sheet is disposed thereunder, the basis weight of the surface sheet, or the surface sheet and the intermediate sheet Total weight of 25g / m ² To 75g / m ² If it is in the range, the brightness measured from the skin side surface side of the entire panty liner can be set to a preferable range of 5.7 to 9.3. The lower limit of the basis weight is 20 g / m. ² Even if it is a grade, the same effect can be acquired.
[0151]
[Table 1]

[0152]
[Table 2]

[0153]
<Examples 12 and 13>
As Example 12 and Example 13, a panty liner in which a top sheet, an intermediate sheet, an absorbent sheet, and a back sheet were stacked was manufactured.
[0154]
In the surface sheets in both examples, the longitudinally extending ridges and grooves are shaped at a constant pitch in the lateral direction, and a large number of pin embossed portions are regularly formed in the region. I used something. However, no forced opening is formed in the sheet at the pin embossed portion.
[0155]
The arrangement pitch in the lateral direction of the ridges is 2 mm. The pin embossed portion is formed along the bottom surface of the groove portion of the ridge groove of the top sheet, and the arrangement of the pin embossed portion is 2 mm, the same as the pitch of the ridge, in the vertical direction. The pitch (pitch in the direction along the groove) is 2.3 mm. The area occupied by the pin embossed portion in the region having a diameter of 0.7 mm and a width of 20 mm was set to 8.3%.
[0156]
As the top sheet, a sheet in which the ridges, grooves, and pin embosses were formed at the same time by sandwiching a nonwoven fabric between the first roll and the second roll was used. The first roll has recesses with a width of 1.3 mm extending in the roll circumferential direction at a pitch of 2 mm in the roll axis direction, and a pressing pin with a diameter of 0.7 mm is provided between the grooves. Those arranged at a pitch of 2.3 mm toward the roll circumferential direction were used. The 2nd roll used what the convex part with a width | variety of 0.3 mm extended in the roll circumferential direction was formed with the pitch of 2 mm in the roll axial direction.
[0157]
The nonwoven fabric is pressed so that the pressing pin of the first roll hits the bottom of the groove between the convex portions of the second roll. The temperature of the roll surface at this time was 100 to 110 ° C., and the pressure between the rolls was 2450 kPa. As a result, a surface sheet having a thickness of 1 mm and having ridges and pin embossing was obtained.
[0158]
The intermediate sheet used was not shaped with wrinkles and grooves.
The surface sheet and the intermediate sheet are each a spunbond nonwoven fabric formed of colored polypropylene fibers mixed with a master badge and melt-extruded (weighing 30 g / m) ² )It was used.
[0159]
The absorbent sheet is the same as in Examples 1 to 5, 10, 11. The same uncolored one as in Comparative Examples 1 to 5 was used.
[0160]
The back sheet has a basis weight of 23.5 g / m formed of colored polyethylene resin. ² Polyethylene film was used.
[0161]
In the following examples, before the panty liner is assembled, the hue, lightness, and saturation of each sheet are measured independently. It was measured.
[0162]
Example 12
The surface sheet had a Munsell color system hue of 7.8 YR, lightness of 8.6, and saturation of 2.0.
[0163]
The intermediate sheet had a Munsell color system hue of 6.5 YR, lightness of 7.3, and saturation of 3.2.
[0164]
The absorption sheet had a Munsell color system hue of 4.2Y, lightness of 9.6, and saturation of 0.2.
[0165]
The back sheet had a Munsell color system hue of 4.4YR, lightness of 7.7, and saturation of 3.3.
[0166]
The entire panty liner was beige when viewed from the skin side surface, and the hue of the Munsell color system was 6.4 YR, the brightness was 7.3, and the saturation was 2.8.
[0167]
(Example 13)
The surface sheet had a Munsell color system hue of 1.3R, lightness of 9.4, and saturation of 1.0.
[0168]
The intermediate sheet had a Munsell color system hue of 1.5R, lightness of 9.2, and saturation of 1.2.
[0169]
The absorbent sheet is the same as in Example 12.
The back sheet had a Munsell color system hue of 5.9R, lightness of 9.5, and saturation of 0.8.
[0170]
As a result, a pink panty liner was obtained when viewed from the skin side surface. When measured from the skin side surface side, the hue of the Munsell color system was 0.2R, the lightness was 9.2, and the saturation was 2.2.
[0171]
Regarding Example 12 and Example 13, the same evaluation as in Examples 1 to 11 and Comparative Examples 1 to 5 was carried out, and as a result of performing monitor evaluation of concealability and visibility of menstrual blood, both evaluations were “ ○ ”.
[0172]
[Table 3]

[0173]
【The invention's effect】
The absorptive article of the present invention is suitable for wearing according to colored underwear, and the lightness measured from the upper surface of the skin side surface is set to 5.7 to 9.3 of the Munsell color system. In addition, it is excellent in concealing property of the sag attached to the skin side surface, and when menstruation starts while wearing a panty liner, it can be known early that menstruation has started. Therefore, it is suitable for use as a substitute for the crotch of the underwear.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a panty liner according to a first embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line II-II in FIG.
FIG. 3 is a perspective view showing a panty liner according to a second embodiment;
4 is a half sectional view taken along line IV-IV in FIG.
[Explanation of symbols]
1 Panty liner
11 Back sheet
12 Absorption sheet
13 Intermediate sheet
14 Surface sheet
14a Liquid permeation hole
30 Liquid permeation area
40 Skin side surface

Claims (10)

In a colored absorbent article that is attached to the inner surface of the undergarment and can be matched to the color of the undergarment,
It has a skin side surface directed to the skin side of the wearer and a clothing side surface directed to the inner surface of the undergarment, and a surface sheet is provided on the skin side surface. A non-woven fabric formed of only one or more colored fibers of fibers and recycled fibers,
One or more other non-woven fabrics formed of fibers colored in the same color as the surface sheet are provided on the lower side of the surface sheet as an intermediate sheet,
The lightness when the absorbent article is measured from the skin side surface is different from the lightness of the surface sheet alone, and the lightness is within the range of 5.7 to 9.3 of the Munsell color system. Absorbent article. In a colored absorbent article that is attached to the inner surface of the undergarment and can be matched to the color of the undergarment,
It has a skin side surface directed to the skin side of the wearer and a clothing side surface directed to the inner surface of the underwear, and a surface sheet is provided on the skin side surface, and this surface sheet is a colored synthetic resin sheet Yes,
One or more other non-woven fabrics formed of fibers colored in the same color as the surface sheet are provided on the lower side of the surface sheet as an intermediate sheet,
The lightness when the absorbent article is measured from the skin side surface is different from the lightness of the surface sheet alone, and the lightness is within the range of 5.7 to 9.3 of the Munsell color system. Absorbent article. In a colored absorbent article that is attached to the inner surface of the undergarment and can be matched to the color of the undergarment,
A skin-side surface directed toward the skin side of the wearer, and a clothing-side surface directed toward the inner surface of the undergarment, and a surface sheet is provided on the skin-side surface;
This surface sheet is a combination of a non-woven fabric formed with only one or more colored fibers of synthetic resin fibers, semi-synthetic fibers, and regenerated fibers, and a colored synthetic resin sheet,
One or more other non-woven fabrics formed of fibers colored in the same color as the surface sheet are provided on the lower side of the surface sheet as an intermediate sheet,
The lightness when the absorbent article is measured from the skin side surface is different from the lightness of the surface sheet alone, and the lightness is within the range of 5.7 to 9.3 of the Munsell color system. Absorbent article.   The absorbent article according to claim 1 or 3, wherein the colored fiber contains a colorant therein.   The absorbent article according to claim 1 or 3, wherein the colored fiber has a surface coated with a colorant.   The colored fiber contained in the other nonwoven fabric is one or more of synthetic resin fiber, semi-synthetic fiber, and regenerated fiber, and contains a colorant therein. Absorbent article.   The colored fiber contained in the other non-woven fabric is at least one of synthetic resin fiber, semi-synthetic fiber, and regenerated fiber, and the surface thereof is coated with a colorant. Absorbent article according to crab. A sheet formed of uncolored fibers is located under the top sheet and the intermediate sheet, and a total basis weight of the top sheet and the intermediate sheet is 25 g / m ² or more and 75 g / m ² or less. The absorbent article according to any one of claims 1 to 7.   The absorptive article according to any one of claims 1 to 8 whose brightness when the surface sheet is measured independently from any one of the surfaces is in a range of 5.7 to 9.3 of Munsell color system. .   The absorbent article according to any one of claims 1 to 9, wherein the absorbent article is used as a panty liner for absorbing vaginal discharge.

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