JP4390449B2 - Colored absorbent articles - Google Patents

Description

【０１２５】
＜実施例１および２＞
実施例１および実施例２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。
【０１２６】
両実施例での表面シートは、縦方向中心線を中心として幅が２０ｍｍの範囲で且つ縦方向に全長に延びる領域に、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。
【０１２７】
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、前記幅寸法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。
【０１２８】
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。
【０１２９】
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。
【０１３０】
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。
なお、前記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。
【０１３１】
吸収シートは、前記参考例１ないし７、比較例１ないし５と同じものであり、着色していないものを用いた。
【０１３２】
裏面シート１１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。
【０１３３】
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。いずれの色相、明度および彩度も、３回の測定値の平均値とした。
【０１３４】
（実施例１）
表面シートの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。
【０１３５】
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。
【０１３６】
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。
【０１３７】
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。
【０１３８】
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。
【０１３９】
（実施例２）
表面シートは、マンセル表色系の色相が４．０Ｂ、明度を９．５、彩度を０．８５とした。
【０１４０】
中間シートは、マンセル表色系の色相を４．１Ｂ、明度を９．６、彩度を０．９５とした。
【０１４１】
吸収シートは実施例１と同じである。
前記裏面シートは、マンセル表色系の色相を７．３Ｂ、明度を９．１、彩度が２．２とした。
【０１４２】
パンティーライナーを液透過領域３０の上方から見たときに水色であり、マンセル表色系の色相は７．４Ｂ、明度は８．９、彩度は２．９であった。
【０１４３】
実施例１と２のように、完成したパンティーライナーでは、表面シートを透過してその下に位置する中間シートおよび吸収シートが透けて見えるが、前記のように各素材の色を調整すると、前記パンティーライナーを肌側表面から測定したときの明度を好ましい範囲にできる。
【０１４４】
実施例１と実施例２に関して、前記参考例１ないし７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。
【０１４５】
【表２】

【０１４６】
【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、肌側表面から測定した明度をマンセル表色系の５．７〜８．７としたことにより、おりものの隠遮性に優れ、また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パンティーライナーとして適したものとなる。
【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 受液面[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 do not wear panty liners to absorb large amounts of cages as in the past, but rather to prevent the underwear from getting dirty. 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 underwear or a set of three or more points, 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 an alternative to underwear crotch or as a replaceable crotch, the wearer emphasizes the wear when worn 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.). For 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 liner is used for colored underwear, there is a concern that other people may know that the liner is worn when wearing underwear in public.
[0011]
As such an absorbent article for women, for example, there is one disclosed in Patent Document 1 below. This is a panty liner in which an absorbent core is sandwiched between a top sheet directed to the skin of the wearer and a back sheet directed to the clothing side, and the top sheet and the back sheet are dark materials such as black It is composed of. By attaching this black panty liner to black underwear, it can be made the same color as the underwear, and by making the panty liner itself dark, conspicuous vaginal discharge, urine, or menstrual blood It is to lose.
[0012]
In addition to the one described in Patent Document 1, it is not intended to have the same color as that of the underwear, but a panty liner colored with a catechin and colored green, an absorbent layer and a backsheet There are also commercially available panty liners that are colored and show their color through the top sheet.
[0013]
[Patent Document 1]
EP1108406
[0014]
[Problems to be solved by the invention]
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 (cage, menstrual blood, incontinence urine). ing.
[0015]
However, dark panty liners such as black are less prominent in the attached body fluid, and are effective in absorbing and concealing things at times other than the menstrual period to prevent stains on the underwear, 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.
[0016]
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.
[0017]
In addition, the panty liner colored green or the like as described above is merely to make the appearance of the panty liner itself better by making the appearance of the panty liner lighter, and the brightness when viewed from the skin side surface Therefore, the function of hiding body fluid is inferior. Therefore, although there is little anxiety that the menstrual blood is concealed and delays in noticing the start of menstruation, the effect of concealing the cage is not high. In addition, it is not designed for the same color as underwear, so it is not suitable as a crotch substitute for colored panties.
[0018]
The present invention is suitable for use according to the color of the underwear, has high concealment of the cage, and is less likely to miss the attachment of menstrual blood at the start of menstruation, and is a woman who takes care of the underwear Is intended to provide an absorbent article useful for use as a panty liner.
[0019]
[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.
  The absorbent article is a laminate of a plurality of sheets,It has a skin-side surface facing the wearer's skin and a clothing-side surface facing the inner surface of the underwearAnd
  The entire surface sheet appearing on the skin side surface is colored so that the colored color can be seen when viewed from the skin side surface, and the brightness measured from the skin side surface is 5.7 of the Munsell color system. Within the range of ~ 8.7so,
  The back sheet that appears on the clothing side surfaceButAlmost the same size as the top sheetso,Colored to be similar or similar to the surface sheetAnd
  The absorbent sheet located between the top sheet and the back sheet is not coloredIt is characterized by this.
[0020]
Since the absorbent article of the present invention exhibits a color that is not white, it is possible to select and wear a color similar to or similar to the color of the panties, and is conspicuous when mounted on the crotch of the panties It is possible to create a sense of unity with the crotch. In addition, if the brightness measured from the skin side surface is within the above range, the absorbed octopus is not conspicuous, and the occluding material is excellent in concealment. The menstrual blood adhering to the surface or absorbed menstrual blood can be immediately recognized, and it is easy to quickly know that menstruation has started. Therefore, it is suitable for use as a crotch replacement for panties or for crotch replacement.
[0022]
When using a synthetic resin containing a colorant, such as a synthetic resin fiber containing a colorant or a synthetic resin film containing a colorant, the amount of the colorant contained in the synthetic resin or the colorant By selecting or combining the types, it becomes easy to adjust the hue and brightness of the colored sheet. 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.
[0024]
  The top sheet and the back sheet are approximately the same size, and the back sheet is colored in a similar or similar color to the top sheetForThe color of the absorbent article can be recognized from both the front and back sides,It becomes easy to select a color similar to, or similar to, or the same color as the panties. Also noticeable when worn from the outside of the pantiesOn the groundIt ’s going to be.
[0025]
In this case, in the absorbent article, the top sheet and the back sheet protrude from both sides at positions separated from the front edge portion and the rear edge portion facing in the vertical direction, and a wing portion having a predetermined area is formed. It may be.
[0026]
The wing portion is folded back toward the outer surface of the underwear through the side edge of the crotch portion of the underwear and bonded to the outer surface, whereby the absorbent article is firmly attached to the underwear. Since the wing portion appearing on the outer surface is similar, similar or the same color as the undergarment, the wing portion becomes inconspicuous.
[0027]
Further, in the present invention, an adhesive layer for adhering to clothing is provided on the surface of the back sheet, and an edge portion of the adhesive layer is located on an inner side than all the edge portions of the back sheet. It is preferable that
[0028]
Since the adhesive layer does not exist in a predetermined region inside the edge of the back sheet, the edge of the absorbent article can be easily grasped with a finger when removed from the panty.
[0029]
In addition, the absorbent article of the present invention has a thin thickness of 0.25 mm or more and 3.5 mm or less from the surface of the surface sheet appearing on the skin side surface to the surface of the back sheet appearing on the clothing side surface. Is.
[0030]
By making it thin like this, it is possible to obtain a sense of unity with the crotch when it is mounted on the crotch of the panties.
[0031]
Moreover, in this invention, it is preferable that the said surface sheet is a nonwoven fabric.
If the topsheet is non-woven, it will be similar to the material of the panty crotch made of fibers, and when attached to the panty crotch, it will tend to create a sense of unity with the underwear and will also soften the skin. Excellent wearing feeling.
[0032]
As described above, the absorbent article of the present invention is suitable for use as a panty liner that is attached to the crotch portion of the undergarment and absorbs mainly the scent.
[0033]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view showing a panty liner that is a colored absorbent article according to the first 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.
[0034]
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.
[0035]
This panty 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. 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.
[0036]
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.
[0037]
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 portion where the width dimension 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.
[0038]
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.
[0039]
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.
[0040]
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.
[0041]
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.
[0042]
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 having a four-sheet structure including 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.
[0043]
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.
[0044]
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 part 2, the left side edge part 3, the front edge part 4, and the rear edge part 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.
[0045]
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.
[0046]
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.
[0047]
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%.
[0048]
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.
[0049]
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.
[0050]
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.
[0051]
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 14 a, 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.
[0052]
When the entire panty liner 1 is viewed from the skin side surface 40 side, a color that is not white can be recognized. This color is, for example, pink, light blue, beige, etc., and is similar to, similar to, or the same color as the underwear color that women generally prefer. For this reason, the panty liner 1 suitable for the color of the underwear can be selected.
[0053]
Further, the brightness of the Munsell color system when the panty liner 1 in a state where no excretion liquid such as a cage is given is measured from the skin side surface 40 side is in the range of 5.7 to 8.7. . In this embodiment, a part of the skin-side surface 40 is a central liquid-permeable region 30 having the liquid-permeable holes 14a, but the lightness measured at the central liquid-permeable region 30 and the skin side Both of the brightness values measured in the region other than the central liquid permeable region 30 on the surface 40 are in the range of 5.7 to 8.7. 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.
[0054]
When the brightness of the Munsell color system is within the range of 5.7 to 8.7 when the entire panty liner 1 in a state where no excretion liquid such as a cage is given is viewed from the skin side surface 40, The difference between the brightness of the cage, which is usually white or cream, and the brightness of the color of the panty liner 1 itself visible from the skin-side surface 40 is reduced, so that it adheres to the skin-side surface 40 or permeates the surface sheet 14. As a result, the color of the cage that has reached the intermediate sheet 13 and the absorbent sheet 12 becomes inconspicuous from the outside.
[0055]
On the other hand, since there is a large difference between the brightness of menstrual blood and the color brightness of the panty liner 1 itself visible from the skin side surface 40, it adheres to the skin side surface 40 or permeates through the surface sheet 14 and passes through the intermediate sheet 13. The menstrual blood that has reached the absorbent sheet 12 can be immediately visually recognized from the outside. Therefore, even when menstruation starts while the panty liner 1 is worn, the wearer can know early that menstruation has started, and the wearer can replace the panty liner with a sanitary napkin after menstruation has started. This can be done early. Therefore, it becomes easy to prevent menstrual blood from exceeding the absorption holding amount of the panty liner 1 and causing menstrual blood to leak and stain clothes and the like.
[0056]
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.
[0057]
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 “brightness” means a visual sense attribute indicating the magnitude of the luminous reflectance (reflectance relating to brightness) 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.
[0058]
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.
[0059]
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.
[0060]
In order to exhibit the brightness in the range of 5.7 to 8.7 when the panty liner 1 is viewed from the skin side surface 40, the top sheet 14 and the intermediate sheet 13 constituting the panty liner 1 are used. The at least 1 sheet | seat of each sheet | seat of the absorption sheet 12 and the back surface sheet 11 should just be colored. However, in the panty liner 1 of this embodiment, the top sheet 14 and the back sheet 11 are colored in similar or similar colors. In this case, the brightness of the panty liner 1 measured from the back sheet 11 side is also preferably in the range of 5.7 to 8.7.
[0061]
When both the front sheet 14 and the back sheet 11 are similar or similar colors (preferably the same color) and both exhibit the lightness of 5.7 to 8.7, the skin side surface and the clothing side of the panty liner 1 Both surfaces can be matched to the color of the underwear, and when attached to the crotch portion of the underwear, a sense of unity matching the color of the crotch portion of the underwear can be generated. Further, 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.
[0062]
The hue of the panty liner is arbitrary as long as it is not white, but in order to make the brightness measured from the surface on the skin side within the range of 5.7 to 8.7, in the case of pink, it is in the range of 5RP to 5R. In the case of a light blue system, it is preferable to set the range of 5BG to 10B, and in the case of a beige system, the range is preferably 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 8.7.
[0063]
As described above, the pressure-sensitive adhesive layer 15 is provided on the surface of the back sheet 11 (clothing side surface). On the surface of the back sheet 11, all the edges of the back sheet 11 It is preferable that a gap of at least 2 mm is provided between the edge of the pressure-sensitive adhesive layer 15 facing the edge. If comprised in this way, on the surface of the back surface sheet 11, the color of the back surface sheet 11 will appear in the predetermined range inside the edge part without being inhibited by the pressure sensitive adhesive layer 15. Therefore, when the side edge part of the back surface sheet 11 protrudes from the crotch part of underwear, it becomes difficult to stand out from the outside. Further, even when the front edge part 4 or the rear edge part 5 facing the longitudinal direction of the panty liner 1 is bent toward the wearer, the appearance of the panty liner 1 remains similar or similar to the underwear. The panty liner 1 becomes assimilated with the underwear and the panty liner 1 becomes less noticeable when viewed from the inside of the underwear.
[0064]
Further, if a region where the pressure-sensitive adhesive layer 15 does not exist is formed on the inner side of all the edges of the back sheet 11, any part of the edge of the panty liner 1 can be grasped with a finger. It becomes easy to peel off the panty liner 1 from the crotch part of the underwear.
[0065]
The top sheet 14 and / or the intermediate sheet 13 are formed of, for example, a spunbond nonwoven fabric. The spunbond nonwoven fabric uses fibers formed of a synthetic resin in which a colorant is kneaded as at least a part of the fibers. Moreover, in order to make a color uniform in all the parts of the surface of a nonwoven fabric, it is preferable that all the fibers which comprise a nonwoven fabric are the said colored fibers.
[0066]
Further, the top sheet 14 and / or the intermediate sheet 13 are two non-woven 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.
[0067]
The colored synthetic fiber was 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 were mixed and melt-extruded. Is. Moreover, it can replace with the said material and can also use other types of nonwoven fabrics, such as the spunlace nonwoven fabric formed with the said colored synthetic resin fiber.
[0068]
When the surface sheet 14 is formed of a nonwoven fabric, the texture of the skin side surface 40 of the panty liner 1 can be made close to the texture of the crotch portion of the underwear.
[0069]
Further, as the surface sheet 14, a raw material obtained by mixing a pellet of synthetic resin such as polyethylene resin or polypropylene resin and a master batch made of a coloring agent and synthetic resin such as polyethylene resin or polypropylene resin is melt-extruded. It is also possible to use a colored resin film that has been subjected to opening treatment. In addition, this colored resin film and a nonwoven fabric formed with colored fibers are joined and used, or a colored resin film and a nonwoven fabric formed with uncolored fibers are joined. Also good.
[0070]
Furthermore, a sheet in which a desired color is printed on at least one surface of a non-woven fabric formed by fibers such as synthetic resin fibers or an apertured resin film can be used as the top sheet 14. As a printing method at this time, there are flexographic printing, gravure printing, ink jet printing, and the like. Of these, it is preferable to use flexographic 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.
[0071]
The back sheet 11 is preferably a colored resin film such as the above-described colored polyethylene resin. In this case, after adding inorganic filler etc. to the master badge containing synthetic resin pellets and colorant and forming a film by melt extrusion, it is stretched to form a large number of fine pores and moisture permeable It is preferable to use one provided with 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.
[0072]
  The absorbent sheet 12 is made of, for example, rayon, which is a regenerated cellulose fiber, or a spunlace nonwoven fabric composed of polyethylene terephthalate fiber and polypropylene fiber. The fibers constituting the absorbent sheet 12 are white or natural colors exhibited by the respective fibers.is there.
[0073]
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. 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.
[0074]
  In order for the panty liner 1 to exhibit a predetermined hue and brightness, as described above, the top sheet 14, the intermediate sheet 13,Back sideAny one of the sheets 11 may be colored, but when the synthetic resin containing the colorant is used as the colored sheet as described above, the hue and brightness can be selected by selecting the amount and type of the colorant. It becomes easy to control. 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. Further, even if the panty liner is accidentally washed with the underwear, the colorant will not fall off.
[0075]
In addition, each said sheet | seat 11, 12, 13, 14 can also be comprised with the water-decomposable sheet | seat which consists of a colored biodegradable raw material. 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.
[0076]
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.
[0077]
The water-degradable sheet made of a biodegradable material is, for example, natural fibers such as pulp fibers, regenerated cellulose fibers, purified cellulose fibers, or a mixture of any of these, and is colored at least partially. A spunlace nonwoven fabric formed using the fibers can be used.
[0078]
  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 8.7, other structures can be used. For example, a three-layer structure without the intermediate sheet 13 may be used. Also,AboveTwo or more intermediate sheets may be provided.
[0079]
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 panty liner 1 is attached to the skin side surface. If the lightness of the Munsell color system measured from the side is in the range of 5.7 to 8.7, 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.
[0080]
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.
[0081]
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.
[0082]
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.
[0083]
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.
[0084]
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.
[0085]
If both the front sheet 14 and the back sheet 11 are similar colors or similar colors (preferably the same color) and both have the lightness of 5.7 to 8.7, the wings 10 and 10 are colored underwear. It is possible to match, and wearing the panty liner is less noticeable.
[0086]
【Example】
  Examples belowReference examplesAnd about the comparative example, the hiding property evaluation of the cage and the visibility evaluation of menstrual blood were performed.
[0087]
<referenceExamples 1 to 7 and Comparative Examples 1 to 5>
  belowreferenceExample 1 orreferenceIn Example 7 and Comparative Examples 1 to 5, the first intermediate sheet and the second intermediate sheet are selectively used under the surface sheet. The surface sheet, the first intermediate sheet, and the second intermediate sheet are selectively used. The sheets 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.
[0088]
(referenceExample 1)
  A top sheet, a first intermediate sheet, and a second intermediate sheet are provided so as to overlap each other, and each of the top sheet, the first intermediate sheet, and the second intermediate sheet is a pink master batch (40% by mass of titanium oxide). , Quinacridone red 0.365% by mass, condensed azo red 0.135% by mass, PP resin 42.8% by mass, dispersant 16.7% by mass) mixed in a proportion of 1.6% by mass ( PP) Spunbond nonwoven fabric (fiber weight 25 g / m) made of fibers (2.2 dtex) obtained by extruding resin²).
[0089]
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 Wet spunlace nonwoven fabric obtained by mixing 15% by mass of fiber and hydroentangling (weight per unit: 38 g / m²)It was used.
[0090]
  For the material of this absorbent sheet, a non-white colorant was not used, viscose rayon was a natural color at the time of manufacture, and PE fibers and PP fibers were white materials containing an inorganic filler. Examples of the hue and brightness of the absorbent sheet alone will be described later.1And examples2It is the same as the absorbent sheet. In addition, each of the followingreferenceAbsorbent sheets of examples and comparative examplesIsThe same thing is used.
[0091]
22.5 g / m as back sheet²White polyethylene film, that is, a whitened film containing an inorganic filler was used.
[0092]
  Then, the absorbent sheet, the second intermediate sheet, the first intermediate sheet, and the top sheet are sequentially laminated on the back sheet, and the edges of the sheets are joined with a hot melt adhesive to absorb Create an article,referenceExample 1 was adopted.
[0093]
  thisreferenceThe lightness of the Munsell color system measured from the top sheet side of Example 1 was 8.70. As described above, the lightness of the Munsell color system is a value measured by a color difference meter “CR-300” manufactured by Minolta Co., Ltd., and this is the same in the following examples and comparative examples. .
[0094]
(referenceExample 2)
  PP resin mixed with 1.6% by weight of light blue masterbatch (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) Spunbond nonwoven fabric (fiber weight 25 g / m) made of fibers (2.2 dtex) obtained by extrusion²) As the top sheet, the first intermediate sheet and the second intermediate sheet,referenceAn absorbent article having the same structure as in Example 1 was prepared, and this wasreferenceExample 2 was adopted. The lightness of the Munsell color system was 8.70.
[0095]
(referenceExample 3)
  1 beige-colored masterbatch (16.65% titanium oxide, 7.17% yellow iron oxide, 3.09% red iron oxide, 0.75% carbon black, 72.34% PP resin) Spunbond non-woven fabric composed of fibers (2.2 dtex) obtained by extruding PP resin mixed at a ratio of 7 mass% (weight per unit: 25 g / m²) As the top sheet and the first intermediate sheet to make an absorbent articlereferenceExample 3 was used.
  The lightness of the Munsell color system was 7.00.
[0096]
(referenceExample 4)
  referenceAn absorbent article having a structure excluding the first intermediate sheet from Example 3 was prepared.referenceExample 4 was adopted.
  The lightness of the Munsell color system was 8.00.
[0097]
(referenceExample 5)
  referenceThe structure is the same as that of Example 4, and the surface sheet is a spunbond nonwoven fabric using a beige master badge and the basis weight is 30 g / m.²Use this onereferenceExample 5 was adopted.
  The lightness of the Munsell color system was 7.25.
[0098]
(referenceExample 6)
  referenceIn the same structure as in Example 3, the top sheet and the first intermediate sheet are beige master.-Spunbond nonwoven fabric using badges, each with a basis weight of 30 g / m²And thisreferenceExample 6 was adopted.
  The lightness of the Munsell color system was 5.90.
[0099]
(referenceExample 7)
  referenceExample 3 further using a second intermediate sheet which is the same nonwoven fabric as the top sheet and the first intermediate sheetreferenceExample 7 was adopted.
  The lightness of the Munsell color system was 5.70.
[0100]
(Comparative Example 1)
  referenceSame basis weight as Example 7 is 25 g / m²With a surface sheet,referenceSame basis weight as the first intermediate sheet of Example 6 is 30 g / m²Was used as the first intermediate sheet and the second intermediate sheet, and this was designated as Comparative Example 1.
  The lightness of the Munsell color system was 5.50.
[0101]
(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.
[0102]
(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.
[0103]
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.
[0104]
(Comparative Example 4)
While using the surface sheet of the comparative example 1, 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.
[0105]
(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 oxide²) Was used as a top sheet, and this was designated as Comparative Example 5.
The lightness of the Munsell color system was 9.60.
[0106]
<Evaluation of concealment of cages and visibility of menstrual blood>
(1) Lightness measurement
  EachreferenceIn each of the examples and the comparative examples, the brightness was measured from the liquid receiving surface in the initial state before the liquid was dropped.
[0107]
(2) Concealment evaluation of pseudo-origin
  Using the color difference meter, each color difference reference color and eachreferenceThe color difference with the skin side surface of an example and a comparative example was measured as a Hunter (Lab) value. The initial color difference measurement value when the liquid is not dripped is ΔE₀And
[0108]
  Next, 0.5 ml of distilled water is used as a simulated container.referenceIt dropped on the upper surface sheet of the example and the comparative example, and the color difference with the color difference reference color was also measured. This measured value is₁And
[0109]
The initial color difference measurement value ΔE before dropping the simulated cage₀And the color difference measured value ΔE after dropping.₁Absolute value of difference from₀-ΔE₁| Is defined as a concealing effect on the pseudo-cage and is shown in Table 1.
[0110]
  The absolute value | ΔE₀-ΔE₁The 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 | ΔE₀-ΔE₁| Is preferably 9 or less, more preferably 8 or less,referenceA preferred value based on the example is 7.71 or less.
[0111]
(3) Monitor evaluation of concealment of pseudo cage
  0.5 ml of the simulated cagereferenceIt dripped on the surface sheet upper surface of an example and a comparative example, and made 10 monitors monitor visually and determined occlusion property.
[0112]
The brightness of the determination place was 76 lux, and the average visual acuity (including corrected visual acuity) of the monitor was 1.0.
[0113]
Judgment was carried out based on the following criteria based on the following five criteria: “Very preferable”, “Slightly preferable”, “Neither”, “Not very preferable”, and “Not preferable”.
[0114]
・ 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 △: ×
[0115]
(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. Each before imitating simulated menstrual bloodreferenceColor difference ΔE of skin side surface of examples and comparative examples₀And 0.5 ml of simulated menstrual bloodreferenceThe color difference after dropping on the top surface of the top sheet of the example and the comparative example is ΔE₁And the absolute value of the difference between the color differences | ΔE₀-ΔE₁| Is shown in Table 1 as an evaluation of pseudomenstrual blood discrimination.
[0116]
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.
[0117]
The absolute value | ΔE₀-ΔE₁The 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 | ΔE₀-ΔE₁| Is preferably 43 or more, and a preferred value based on the example is 44.38 or more.
[0118]
(5) Monitor evaluation of discrimination of pseudomenstrual blood
  0.5 ml of the simulated menstrual bloodreferenceIt dripped on the upper surface sheet | seat surface of an example and a comparative example, and made 10 monitors monitor the visibility visually.
  The brightness of the determination place was 76 lux, and the average visual acuity (including corrected visual acuity) of the monitor was 1.0.
[0119]
The brightness of the determination place was 76 lux, and the average visual acuity (including corrected visual acuity) of the monitor was 1.0.
[0120]
The evaluation was made in five levels: “easy to see”, “visible”, “cannot say”, “difficult to see”, and “not visible”, and was performed according to the following criteria.
[0121]
・ 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 △: ×
[0122]
<Result>
  eachreferenceTable 1 shows the structures of the examples and the comparative examples, and the results of the evaluation of the hiding property of the cage and the visibility evaluation of menstrual blood.
[0123]
From Table 1, it is understood that the lightness of the Munsell color system needs to be in the range of 5.7 to 8.7 in order to improve both the hiding property of the cage and the visibility of menstrual blood.
[0124]
[Table 1]

[0125]
<Example1 and 2>
  Example1And examples2As a result, a panty liner in which a top sheet, an intermediate sheet, an absorbent sheet, and a back sheet were stacked was manufactured.
[0126]
The surface sheets in both examples are shaped in a region having a width of 20 mm around the center line in the longitudinal direction and extending in the longitudinal direction over the entire length, with longitudinally extending ridges and grooves at a constant pitch in the lateral direction. In addition, a structure in which a large number of pin embossed portions are regularly formed in the region is used. However, no forced opening is formed in the sheet at the pin embossed portion.
[0127]
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. The arrangement of the pin embossed portions is 2 mm in the horizontal direction, which is the same as the pitch of the ridge. The pitch (pitch in the direction along the groove) is 2.3 mm. The pin boss portion had a diameter of 0.7 mm, and the area occupied by the pin emboss portion in the region having the width of 20 mm was 8.3%.
[0128]
As the top sheet, a sheet in which the ridges, grooves, and pin embosses were simultaneously formed 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 whose width | variety extended in a roll circumferential direction is 0.3 mm was formed with the pitch of 2 mm in the roll axial direction.
[0129]
The nonwoven fabric is pressurized 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.
[0130]
The intermediate sheet used was not shaped with wrinkles and grooves.
The surface sheet and the intermediate sheet are each a spunbonded nonwoven fabric (weighing 30 g / m) formed of colored polypropylene fibers obtained by mixing and extruding a master badge.²)It was used.
[0131]
  The absorbent sheetReference example1 to 7 and Comparative Examples 1 to 5, which were not colored, were used.
[0132]
The back sheet 11 has a basis weight of 23.5 g / m formed of a colored polyethylene resin.²Polyethylene film was used.
[0133]
In the following examples, before the panty liner is assembled, the hue, lightness, and saturation of each sheet are measured independently. It was measured. Any hue, lightness, and saturation were taken as the average of three measurements.
[0134]
(Example1)
  The Munsell color system hue of the topsheet was 7.8 YR, the lightness was 8.6, and the saturation was 2.0.
[0135]
The intermediate sheet had a Munsell color system hue of 6.5 YR, lightness of 7.3, and saturation of 3.2.
[0136]
The absorption sheet had a Munsell color system hue of 4.2Y, lightness of 9.6, and saturation of 0.2.
[0137]
The back sheet had a Munsell color system hue of 4.4YR, lightness of 7.7, and saturation of 3.3.
[0138]
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.
[0139]
(Example2)
  The surface sheet had a Munsell color system hue of 4.0B, lightness of 9.5, and saturation of 0.85.
[0140]
The intermediate sheet had a Munsell color system hue of 4.1 B, lightness of 9.6, and saturation of 0.95.
[0141]
  Absorbing sheet is an example1Is the same.
  The back sheet had a Munsell color system hue of 7.3B, lightness of 9.1, and saturation of 2.2.
[0142]
When the panty liner was viewed from above the liquid permeable region 30, it was light blue, and the Munsell color system had a hue of 7.4B, a lightness of 8.9, and a saturation of 2.9.
[0143]
  Example1 and 2As shown in the figure, the finished panty liner can be seen through the top sheet and the intermediate sheet and the absorbent sheet located below it, but when the color of each material is adjusted as described above, The brightness when measured from the surface can be in a preferred range.
[0144]
  Example1And examples2With respect toreferenceAs in Examples 1 to 7 and Comparative Examples 1 to 5, the evaluation of monitor for hiding and visibility of menstrual blood was conducted. As a result, the evaluation was “◯”.
[0145]
[Table 2]

[0146]
【The invention's effect】
The absorbent article of the present invention is suitable for wearing according to colored underwear, and the brightness measured from the skin side surface is set to 5.7 to 8.7 in the Munsell color system. It is excellent in concealment of things, and when menstruation starts during wearing, it can be known early that menstruation has started. Therefore, it becomes suitable as a panty liner used as an alternative to the crotch of 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 Liquid receiving surface

Claims (6)

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,
The absorbent article has a plurality of sheets laminated , a skin side surface directed toward the wearer's skin side, and a clothing side surface directed toward the inner surface of the underwear ,
The entire surface sheet appearing on the skin side surface is colored and can be visually recognized when viewed from the skin side surface, and the brightness measured from the skin side surface is 5.7 of the Munsell color system. Within the range of ~ 8.7 ,
Wherein in clothing side substantially the same size with the back sheet is the topsheet which appear on the surface of, is colored so that similar colors or similar colors with the topsheet,
An absorbent article , wherein the absorbent sheet located between the top sheet and the back sheet is not colored . At a position apart from each of leading and trailing edges facing the longitudinal direction, the topsheet and the backsheet protrudes on both sides, the absorbent according to claim 1, wherein the wing portion having a predetermined area are formed Goods. An adhesive layer for adhering to clothing is provided on a surface of the back sheet, and an edge portion of the adhesive layer is located on an inner side than all the edge portions of the back sheet. The absorbent article according to 1 or 2 . The absorptive article according to any one of claims 1 to 3 whose thickness from the surface of said surface sheet to the surface of said back sheet is 0.25 mm or more and 3.5 mm or less. The absorbent article according to any one of claims 1 to 4 , wherein the surface sheet is a nonwoven fabric. The absorbent article according to any one of claims 1 to 5 , which is used as a panty liner for absorbing vaginal discharge.

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