JP2014097240A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article difficult to increase costs and having high designability.SOLUTION: A liner 1A which is one example of an absorbent article includes a surface layer, a leak-proof layer and an absorption layer. On the surface layer, window parts 21, 61 having high transparency are formed as the absorption layer at an area outer than the outer peripheral edge of an absorber 4. A rear surface sheet 3 as the leak preventive layer is colored in a color different from that of the surface layer. The color of the back surface sheet 3 is visible through the window parts 21, 61 of the surface layer in a plan view from the surface layer side. The color of the back surface sheet 3 seen through the window parts 21, 61 and the color of the back surface sheet 3 seen through areas 22, 62 other than the window parts 21, 61 are different in vision from each other.

Description

  The present invention relates to an absorbent article such as a panty liner, a sanitary napkin, an incontinence pad, and a disposable diaper.

  From the viewpoint of reducing the depressed mood of a woman during the menstrual cycle, for example, Patent Document 1 has a graphic printed on an outer region of the absorbent core in a layer that contacts clothing, and the graphic contacts the body. Absorbent articles visible through the layers are described. Patent Document 2 describes an article in which a printed pattern is printed on a side surface of a backsheet facing clothing, and the printed pattern is visible through the top sheet.

  In addition to printing, for example, Patent Document 3 includes a body-side liner made of a laminated material including a first layer having a film-like transparent region and a second layer having a hue, and through the film-like transparent region, An absorbent garment is described in which the color of the second layer is recognizable.

JP 2005-523139 A JP 2010-527681 Gazette Japanese National Patent Publication No. 10-506586

  However, when a graphic is formed by printing, such as the absorbent article described in Patent Document 1 or the article described in Patent Document 2, it is necessary to select a printable material or a printable place, which increases costs. There is also a case where it ends up.

  In that respect, the absorbent garment described in Patent Document 3 forms a film-like transparent region in the first layer of the laminated material by embossing pressure other than printing, and the color of the second layer of the laminated material passes through the film-like transparent region. Therefore, it is difficult to increase the cost, regardless of the material or location, compared to printing. However, since the absorbent garment described in Patent Document 3 can recognize the color of the second layer of the laminated material through the film-like transparent region of the first layer of the laminated material that is a constituent material of the body side liner, The number of materials forming the absorbent garment increases by at least one, which also increases the cost.

  Therefore, the subject of this invention is providing the absorbent article which can eliminate the fault which the prior art mentioned above has.

  The present invention has a surface layer disposed on the skin facing surface side, a leakage preventing layer disposed on the non-skin facing surface side, and an absorption layer disposed between the surface layer and the leakage preventing layer, An absorbent article having a longitudinal direction corresponding to the front-rear direction of the wearer and a lateral direction perpendicular to the longitudinal direction, wherein the surface layer has a region outside the outer peripheral edge of the absorbent layer. In addition, a window portion having a higher transparency than the periphery thereof is formed, and the leak-proof layer is colored in a color different from the surface layer, and the absorbent article is viewed in plan from the leak-proof layer side, The color is visible, the absorbent article is viewed in plan from the surface layer side, and the color of the leak-proof layer is visible through the window portion of the surface layer, The color of the leak-proof layer seen through a window and the color of the leak-proof layer seen through a region other than the window in the outer region of the surface layer By providing an absorbent article the appearance of color is different, it is obtained by solving the above problems.

  According to the absorbent article of the present invention, it is difficult to increase the cost, and high designability can be imparted. Thus, if design nature is improved, emotionality will be improved, for example, if it is during a menstrual cycle, a user's unpleasant feeling can be relieved.

FIG. 1 is a plan view of the panty liner according to the first embodiment of the present invention as viewed from the top sheet side. 2 is a cross-sectional view taken along the line II of FIG. FIG. 3 is a simple assembly view of the panty liner shown in FIG. FIG. 4A and FIG. 4B are plan views showing other shapes of the window portion. Fig.5 (a) is an enlarged plan view of one window part, FIG.5 (b) is the II-II sectional view taken on the line of Fig.5 (a). FIG. 6 is a plan view of a panty liner according to a second embodiment of the present invention viewed from the top sheet side. 7 is a cross-sectional view taken along line III-III in FIG.

The present invention will be described below based on preferred embodiments with reference to the drawings.
The panty liner 1A (hereinafter, also referred to as “liner 1A”), which is the first embodiment of the absorbent article of the present invention, is a surface layer disposed on the skin facing surface side, as shown in FIGS. As shown in Fig. 1, the liner 1A has a leak-proof layer disposed on the opposite surface side, and an absorbent layer disposed between the surface layer and the leak-proof layer. , A surface sheet 2 as a liquid-permeable surface layer, a back sheet 3 as a liquid-impermeable leak-proof layer (hereinafter also referred to as a back layer), and a liquid-retaining absorption disposed between both sheets 2 and 3 It has an absorbent body 4 as a layer, and “surface layer” in this specification means one or a plurality of ones constituting a surface that faces (contacts) the wearer's skin when worn. The term “back layer” means one or a plurality of layers constituting a surface opposite to the surface facing (contacting) the wearer's skin when worn. To. The “absorbing layer” refers to a layer structure of one or a plurality of absorbing structures, and means the absorbing layer itself or a layer in which the absorbing layer is wrapped with a covering sheet.

  As shown in FIG. 1, the liner 1 </ b> A has a longitudinal direction corresponding to the longitudinal direction of the wearer and a lateral direction orthogonal to the longitudinal direction, and has a long shape in the longitudinal direction. It is formed symmetrically with respect to a center line CL extending in the direction. As shown in FIG. 2, the liner 1A has an adhesive portion (not shown) for fixing the liner 1A to a crotch portion (not shown) of underwear such as shorts on the non-skin facing surface of the back sheet 3. Has been. Here, the Y direction in the figure is the same direction as the longitudinal direction of the liner 1A, and is a direction parallel to the center line CL. Further, the X direction in the figure is the same direction as the lateral direction of the liner 1A and is a direction perpendicular to the center line CL. Further, the Z direction in the figure is the thickness direction of the liner 1A.

  As shown in FIG. 1, the liner 1 </ b> A is an abdominal side of the wearer from the excretory part region A when the liner 1 </ b> A is worn. And a rear region C disposed on the back side of the wearer from the excretory region A when the liner 1A is worn. Here, the “excretion area A” refers to an area that comes into contact with the excretion area (vaginal opening) of the wearer, and when there is no so-called wing like the liner 1A, a panty liner, etc. It means an area surrounded by two fold lines extending in the X direction that occurs when the absorbent article is folded into an individual form. When the product length of the absorbent article is long and three fold lines are generated, the Y direction Means a region surrounded by the first fold line and the second fold line, counting from the front end of the first, or a region surrounded by the first fold line and the third fold line, counting from the front end in the Y direction. In addition, when an absorbent article has what is called a wing part, the "excretion part area | region A" means the area | region in which a wing part is located. A wing part said here says the site | part which folds and fixes in the crotch part of a wearer's shorts. A known slip stopper for fixing the shorts is applied to the non-skin facing surface side of the wing portion.

  As shown in FIG. 1, each of the top sheet 2 and the back sheet 3 provided in the liner 1 </ b> A has a vertically long shape in the vertical direction (Y direction), and includes an excretory region A, a front region B, and Each of the rear regions C has a contour that matches the contour of the main body of the liner 1A. Thus, the top sheet 2 and the back sheet 3 are formed in the same shape and size in the liner 1A.

  In the liner 1A, as shown in FIGS. 2 and 3, the top sheet 2 covers the skin facing surface of the absorbent body 4 that is long in the longitudinal direction (Y direction), and the back sheet 3 is long in the longitudinal direction (Y direction). The non-skin facing surface of the absorbent body 4 is covered, and the extending portion extending from the outer peripheral edge of the absorbent body 4 is joined by an adhesive such as hot embossing, ultrasonic sealing or hot melt, etc. As shown in FIGS. 1 and 2, a peripheral seal portion 5 is formed at the peripheral portion.

  As the surface sheet 2, it can be used without particular limitation as long as it is usually used for an absorbent article such as a panty liner, and for example, a hydrophilic and liquid-permeable nonwoven fabric can be used. Specifically, from the viewpoint of absorbability that quickly absorbs excreted body fluid and transmits it to the absorber 4, and from the viewpoint of good touch, a hydrophilic thermal bond nonwoven fabric, an air-through nonwoven fabric, a submerged spunlace weave A cloth or the like is preferable.

The back sheet 3 can be used without particular limitation as long as it is normally used for absorbent articles such as panty liners. For example, a moisture permeable film alone or a laminate of a moisture permeable film and a nonwoven fabric, An aqueous nonwoven fabric or the like can be used. From the viewpoint of quickly removing moisture (so-called wearing humidity) between the absorbent article such as a panty liner and the body, it is most effective to impart moisture permeability and further breathability to the back sheet 3. is there.
Here, “moisture permeability” is a property of water vapor diffusing from the high humidity side to the low humidity side according to the second law of thermodynamics without airflow movement, as in the concept disclosed in JIS Z0208 and ASTM E398. It is a property expressed in a porous film having extremely small pores and a non-porous film highly compatible with water. On the other hand, “breathability” is literally a property of breathing, and is typically a property of airflow passing through like various fabrics.

  The absorbent body 4 can be used without particular limitation as long as it is normally used for absorbent articles such as panty liners. For example, various known polymer sheets can be used, and fibers such as pulp fibers can be used. Or an absorptive core in which water-absorbing polymer particles are held can be coated with a core wrap sheet made of water-permeable thin paper or nonwoven fabric.

The color of the surface layer (surface sheet 2 in the case of the liner 1A) measured with a color difference meter is the hygiene product that the panty liner uses in the delicate area of the woman for the L ^* value in the L ^* a ^* b ^* color system. From the viewpoint, it is preferably 60 or more white, and more preferably 80 or more white. As the color difference meter, a simple spectral color difference meter NF333 (trade name) manufactured by Nippon Denshoku Industries Co., Ltd. can be used. In the “L ^* a ^* b ^* color system” defined in JIS-Z-8729, L ^* indicates brightness, a ^* and b ^* indicate color directions, a ^* indicates a substantially red direction, − a ^* indicates an approximately green direction, b ^* indicates an approximately yellow direction, and -b ^* indicates an approximately blue direction. In the measurement method using the simplified spectral color difference meter NF333, a ND110 sensor of φ4 mm is attached in a stapler type, an O-ring (small) is used at the tip of the sensor, a light source C / 2, and a viewing angle of 2 °. Measure with In addition, the color of the surface layer here should just be the color in the part except the window part 21 in the said range. The sample at the time of measurement is in the form of an absorbent article, and the tip of the sensor is brought into contact from the surface layer side, and pressed so that no gap is formed between the absorbent article and the sensor tip.

  In the surface layer of the absorbent article of the present invention, a window portion 21 having higher transparency than the periphery is formed in a region outside the outer periphery of the absorbent layer. In the liner 1 </ b> A, as shown in FIG. 1, a window portion 21 is formed in a region outside the outer peripheral edge of the absorbent body 4 as the absorbent layer in the topsheet 2 as the top layer. The window portion 21 is a portion having higher transparency than the periphery of the window portion 21 in the top sheet 2. The highly transparent window portion 21 can be formed by squeezing the surface sheet 2 as a surface layer by applying, for example, hot embossing or ultrasonic sealing. In addition, the window part 21 in the liner 1A is formed into a film by pressing the surface sheet 2 by hot embossing from the viewpoint of easy workability and cost reduction. The window portion 21 thus formed into a film is usually a thin layer of the entire window portion 21, but a hole may be formed in a part of the thin layer.

Further, "Transparency" in the "highly transparent window portion 21" can be assessed by the transparency T _P, as the value of the transparency T _P is large, high, high see-through effect transparency. Transparency T _P is back black value L _B to be measured by the following measuring methods, the back white value L _W and black measurements L _O used, can be calculated by the following (Equation 1).

Transparency T _P = {(L _W −L _O ) / (L _W −L _B )} × 100 (1)

Transparency T _P is preferably 20 or more, more preferably 50 or more, still preferably 70 or more. Also, a window portion 21 of the topsheet 2 and the other portion, it is preferable that the difference in transparency T _P is 15 or more, more preferably 25 or more, and still preferably 40 or more.

<Measurement Method of Back Black Value L _B , Back White Value L _W and Black Measurement Value L _O >
1. Adjustment of measuring apparatus For measurement, a simple spectral color difference meter NF333 (trade name) manufactured by Nippon Denshoku Industries Co., Ltd. was used as an operation pen type. C / 2 was used as the light source. In the tip portion of the pen type sensor NF333, select the tip diameter of .phi.4 mm, this tip portion, L ^* value 24, a ^* value of -1, a black paper b ^* values 0 (measured in .phi.4 mm, thickness 0. 35 mm), a circular plate having a circular hole of φ1 mm formed in the center was attached to obtain a measuring apparatus. The circular hole plate is made by forming circular holes in a flat plate (obtained from Yoshinari Printing Co., Ltd., thickness 0.35 mm). If it is, the raised shape is removed with a blade such as “FAS-10” of Feather Safety Razor Co., Ltd., and the circular hole plate is adjusted to a flat shape. In the measurement on the standard plate attached to NF333 with a tip diameter of φ4 mm, the measured values of the white reference plate are L ^* value 96, a ^* value −1, b ^* value 2, and the measured value of the black reference plate The L ^* value was 0, the a ^* value was 0, and the b ^* value was 6. These measured values are average values of three measurements. Here, the L ^* value indicates the brightness in the “L ^* a ^* b ^* color system” defined in JIS-Z-8729, as described above.

2. Preparation of measurement sample A measurement object is the window part 21 formed in the surface layer. As described above, the window portion 21 formed on the liner 1A is a dent compressed from the top sheet 2 side toward the back sheet 3 side, so depending on the size of the bottom of such a window portion 21. It may be difficult to perform accurate measurement by pressing the tip of the spectral color difference meter NF333 against the bottom of the window 21. In such a case, the window portion 21 formed in the surface layer may be cut out to form a measurement sample, and the measurement sample may be used by being fixed to the circular hole portion of the circular hole plate. For fixing the measurement sample to the circular hole plate, for example, a general-purpose double-sided tape such as “Nystack NW-15” manufactured by Nichiban Co., Ltd. is used.

3. Measurement Procedure Next, the back black value L _B , the back white value L _W and the black measurement value L _O are measured by the following procedure. The circular hole plate to which the measurement sample is not fixed is attached to the tip of the pen type sensor (using the target plate attached to NF333) of the spectral color difference meter NF333, and the spectral color difference is attached to the circular hole plate in this state. against a standard black plate supplied with the meter NF333 was measured three times a L ^* value was the average value thereof and back black value L _B. Further, in place of the standard black plate, the L ^* value was measured three times in the same manner as above except that the standard white plate attached to the spectral color difference meter NF333 was used, and the average value thereof was defined as the back white value L _W. . Next, as described above, the measurement sample is fixed to the circular hole portion of the circular hole plate, the circular hole plate is attached to the tip portion of the pen type sensor, and the L ^* value is measured three times. Was taken as the black measured value L _O. In addition, when measuring the back black value L _B , the back white value L _W and the black measurement value L _O for a plurality of types of measurement samples, the measurement tip of the pen type sensor (φ4 mm) and the circular hole plate are measured. It is preferable to prepare the same number of samples and replace the measurement tip and the circular hole plate for each measurement sample.

In the liner 1A, the window portion 21 formed as described above has a longitudinal direction (in the region outside the outer peripheral edge of the absorbent body 4 in each side portion along the longitudinal direction (Y direction) of the liner 1A ( A plurality of them are arranged at intervals in the Y direction). Specifically, it is preferable that 1 or more and 30 or less window portions 21 are disposed on each side portion along the longitudinal direction (Y direction) of the liner 1A, and 1 or more and 15 or less are disposed. More preferably, for example, nine liners 1A are provided. Each window portion 21 preferably has an area of 1 mm ² or more and 400 mm ² or less, and is 25 mm ² or more and 225 mm ² or less from the viewpoint of improving visibility that is easy for the user to see when using. More preferably it is. Further, the ratio of the total area of the window portions 21 to the total area of the region outside the outer peripheral edge of the absorber 4 is 10% or more, particularly 25% or more, and more preferably 35% or more. It is preferable from the viewpoint of giving an impression. Moreover, when using heat processing, such as an embossing process, as the window part 21, the said range is preferable also from a viewpoint of giving the joining strength of the surface sheet 2 and a back surface sheet. Note that the upper limit of the ratio is 80% or less, particularly 70% or less, and further 60% or less, from the viewpoint of the impression due to the difference in visible colors, and in the case of the above-described thermal processing It is preferable for the purpose of giving a good texture.

  As shown in FIGS. 1 and 3, the window portion 21 is preferably formed with a design having design properties from the viewpoint of increasing the emotional value of the user. Here, as a design having design properties, in addition to the floral pattern as shown in FIGS. 1 and 3, for example, a heart-shaped symbol having design properties as shown in FIG. 4A, FIG. For example, a geometric pattern or the like in which a plurality of ellipses, for example, as shown in FIG.

  Further, as shown in FIGS. 5A and 5B, the window portion 21 is more clearly formed with an edge 21 a by pressing along the periphery of the window portion 21. Is preferable from the viewpoint of enhancing visibility and emotional value. The rim 21 a is formed along the entire periphery of the shape of the window portion 21 in plan view of the liner 1 </ b> A, and is formed shallower than the bottom portion 21 b of the window portion 21. When the edge 21a is formed in the window portion 21 in this way, the recess in the Z direction of the window portion 21 becomes deeper in stages at the edge 21a portion and the bottom 21b portion deeper than the edge 21a portion. It has become. The edge 21a shown in FIGS. 5A and 5B is formed in one step along the shape of the window portion 21, but may be formed in two or more steps. The ratio of the depth of the edge 21a to the depth of the bottom 21b (depth of the edge 21a / depth of the bottom 21b) is preferably 0.5 or more and less than 1. More preferably, it is 01 or more and less than 1.

Further, the leak-proof layer (the back sheet 3 in the liner 1A) is colored in a different color from the surface layer (the top sheet 2 in the liner 1A), and the liner 1A is colored with the leak-proof layer (the back sheet 3 in the liner 1A). The color is visible in plan view from the side. That the color of the back sheet 3 and the color of the top sheet 2 are different colors has a color difference that allows a person to fully recognize the difference between the color of the back sheet 3 and the color of the top sheet 2. Means. Specifically, the color of the surface layer (surface sheet 2 in the case of liner 1A) measured with a color difference meter (simple spectral color difference meter NF333 (trade name) manufactured by Nippon Denshoku Industries Co., Ltd.) The measured color of the leak-proof layer (the back sheet 3 in the liner 1A) means that the ΔE ^* value in the “L ^* a ^* b ^* color system” defined in JIS-Z-8729 is 3 or more. Preferably, it is 6 or more, more preferably 10 or more, from the viewpoint that the pattern of the window portion becomes clearer. Here, ΔE ^* is a value obtained by the following equation (2).

ΔE ^* = [(ΔL ^* ) ² + (Δa ^* ) ² + (Δb ^* ) ² ] ^1/2 (2)
(ΔL ^* , Δa ^* , Δb ^* are differences between L ^* value, a ^* value, and b ^* value between two colors. For example, ΔL ^* is calculated by ΔL ^* = L ^* _2- L ^* _1. .)

  As described above, the colored back surface sheet 3 of the liner 1A is visible when the liner 1A is viewed in plan from the back surface sheet 3 side. Here, the colored back sheet 3 is visible when the liner 1A is viewed in plan from the back sheet 3 side, and the back sheet 3 is made of, for example, a moisture-permeable film or a water-repellent nonwoven fabric alone. In the case of being formed, not only the skin facing surface side but also the non-skin facing surface side is colored, and in the case of a laminate of a moisture permeable film and a nonwoven fabric, at least the nonwoven fabric It means that the skin facing surface side and the non-skin facing surface side are colored. In other words, printing on the skin facing surface (coloring) does not show through from the non-skin facing surface side, but the entire surface is printed so that it can be seen directly, or the resin of the constituent resin of the film or the constituent fiber of the nonwoven fabric This means that a colored pigment is kneaded into an original material.

The liner 1A configured as described above is a plan view of the liner 1A from the surface layer (the surface sheet 2 in the liner 1A) side, and the window 1 is provided through the window 21 of the surface layer (the surface sheet 2 in the liner 1A). The color of the leak-proof layer (the back sheet 3 in the liner 1A) is visible. And the color of the leak-proof layer (back sheet 3 in the liner 1A) visible through the window 21 and the absorption layer (absorber 4 in the liner 1A) of the surface layer (surface sheet 2 in the liner 1A) The color appearance is different from the color of the leak-proof layer (the back sheet 3 in the liner 1A) seen through the region 22 other than the window portion 21 in the region outside the outer peripheral edge. Here, the color 1 of the back sheet 3 seen through the window portion 21 and the color of the back sheet 3 seen through the region 22 other than the window portion 21 are different from each other in color. There is a color difference that allows a person to fully recognize visually the difference between the color of the back sheet 3 seen through the window 21 and the color of the back sheet 3 seen through the region 22 in plan view from the top sheet 2 side. It means that Specifically, the color of the back sheet 3 that can be seen through the window portion 21 measured with a color difference meter (such as a simplified spectral color difference meter NF333 (trade name) manufactured by Nippon Denshoku Industries Co., Ltd.) and the region 22 The color of the back sheet 3 that can be seen is that the ΔE ^* value in the “L ^* a ^* b ^* color system” defined in JIS-Z-8729 is preferably 3 or more from the viewpoint of visibility, and is 6 or more. More preferably, it is more preferably 10 or more. Here, ΔE ^* is a value obtained by the above equation (2).

Further, in the liner 1A, the color of the back sheet 3 seen through the region 22 and the inner side of the outer peripheral edge of the absorbent layer (the absorbent body 4 in the liner 1A) of the top layer (the top sheet 2 in the liner 1A) The color appearance is also different from the color of the leak-proof layer (the back sheet 3 in the liner 1A) that can be seen through the region 23 (see FIGS. 1 and 2). Specifically, the color of the back sheet 3 seen through the region 22 measured with a color difference meter (simple spectral color difference meter NF333 (trade name) manufactured by Nippon Denshoku Industries Co., Ltd.) and the inner region 23 The color of the back sheet 3 that can be seen through the sheet is 3 or more from the viewpoint that the ΔE ^* value in the “L ^* a ^* b ^* color system” defined in JIS-Z-8729 is easily seen by the user. It is preferably 6 or more, more preferably 10 or more. Here, ΔE ^* is a value obtained by the above equation (2).

The effect at the time of using liner 1A which is embodiment of the absorbent article of this invention mentioned above is demonstrated.
In the liner 1A, a highly transparent window portion 21 is formed on the top sheet 2, and the back sheet 3 is colored in a different color from the top sheet 2. As shown in FIG. 1, the liner 1A is placed on the top sheet 2 side. When viewed from above, the color of the back sheet 3 seen through the window 21 is different from the color of the back sheet 3 seen through the region 22 other than the window 21 in color. In this way, by simply forming the window portion 21 on the top sheet 2, it is possible to impart high designability with different color appearances, and it is difficult to increase costs. Moreover, if designability can be imparted in this way, emotionality can be enhanced, and for example, during a menstrual cycle, unpleasant emotions of the user can be eased. In addition, except for the peripheral seal part 5, the top sheet 2 and the back sheet 3 are joined only by the window part 21 and are not joined by other parts. Since the colors appear to be more blurry, the emotional nature is further enhanced, and it is more effective to soften the user's feelings by creating a soft atmosphere.

  In particular, since the window portion 21 of the liner 1A is formed by simply squeezing the top sheet 2, it is difficult to increase the cost without selecting a material or a place as compared with printing.

Next, a panty liner 1B (hereinafter also referred to as “liner 1B”) that is a second embodiment of the absorbent article of the present invention will be described with reference to FIGS.
About the liner 1B, a different point from the liner 1A of 1st Embodiment is demonstrated. The points that are not particularly described are the same as those of the liner 1A, and the description of the liner 1A is appropriately applied.

  The surface layer of the liner 1B is composed of a liquid-permeable surface sheet 2 and liquid-impermeable side sheets 6 and 6 disposed on both sides along the longitudinal direction (Y direction) of the surface sheet 2, respectively. The part 61 is formed on the side sheet 6. More specifically, the top sheet 2 as the top layer and the back sheet 3 as the back layer are respectively shown in FIG. 6 and FIG. It covers the entire surface on the non-skin facing surface side and extends from the outer peripheral edge of the absorbent body 4. The extended portion of the top sheet 2 and the extended portion of the back sheet 3 that are extended from the outer peripheral edge of the absorber 4 are fixed in the same manner as the liner 1A. Further, as shown in FIG. 7, the length of the top sheet 2 in the horizontal direction (X direction) is shorter than the length of the back sheet 3 in the horizontal direction (X direction).

  A side sheet 6 as a surface layer is disposed on each side portion along the longitudinal direction (Y direction) of the liner 1B via a surface sheet 2 as a surface layer. As shown in FIG. 7, the side sheet 6 is on the skin facing surface side of the top sheet 2, and as shown in FIG. 6, the side sheet 6 is disposed and fixed over the entire side part in the vertical direction (Y direction). . Each side sheet 6 of the liner 1B is simply disposed and fixed on the skin facing surface side of the top sheet 2 and over the entire side portion. The end on the inner side (close to the center line CL) in the direction (X direction) is a free end, and an elastic member for forming a three-dimensional gather is arranged and fixed in the longitudinal direction (Y direction) in an elongated state near the free end. When worn, a portion having a predetermined width from the free end may be separated from the topsheet 2 to form a three-dimensional gather by the contraction force of the elastic member.

  The side sheet 6 can be used without particular limitation as long as it is normally used for absorbent articles such as panty liners. For example, the side sheet 6 is used for a liquid-impermeable nonwoven fabric, specifically, the back sheet 3. And water-repellent nonwoven fabric.

The color of the surface layer (side sheet 6 in the liner 1B) measured with a color difference meter has an L ^* value in the L ^* a ^* b ^* color system of 60 or more from the same viewpoint as the surface sheet 2 of the liner 1A. It is preferably white, and more preferably 80 or more white.

  In the surface layer of the absorbent article of the present invention, a window 61 having a higher transparency than the periphery is formed in a region outside the outer periphery of the absorbent layer. In the liner 1 </ b> B, as shown in FIG. 6, in the side sheet 6 as a surface layer, in the region outside the outer peripheral edge of the absorbent body 4 as an absorbent layer and in the longitudinal direction of the surface sheet 2 as a surface layer ( A window portion 61 is formed in a region outside the side edge along the (Y direction). The window portion 61 is a portion having higher transparency than the periphery of the window portion 61 in the side sheet 6. The window part 61 with high transparency can be formed by pressing the side sheet 6 as the surface layer by processing the same as the window part 21 of the liner 1A. The window portion 61 formed into a film in this way is normally a thin layer of the entire window portion 61, but a hole may be formed in a part of the thin layer, like the window portion 21 of the liner 1 </ b> A. .

Further, the “transparency” of the “window portion 61 with high transparency” can be evaluated by the transparency T _{P in the same} manner as the window portion 21 of the liner 1A.
Transparency T _P is preferably 20 or more, more preferably 50 or more, still preferably 70 or more.

  In the liner 1B, the window portion 61 formed as described above is a region outside the outer peripheral edge of the absorbent body 4 and a surface layer on each side portion along the longitudinal direction (Y direction) of the liner 1B. A plurality of the topsheets 2 are arranged in a region outside the side edge along the vertical direction (Y direction) with a space in the vertical direction (Y direction). The preferred number of window parts 61 arranged on each side part and the preferred area per window part 61 are the same as those of the window part 21 of the liner 1A.

  As shown in FIG. 6, the window portion 61 is preferably formed of a design having design properties, like the window portion 21 of the liner 1A. Moreover, it is preferable that the edge by compression is formed in the window part 61 along the periphery of the window part 61 similarly to the window part 21 of 1 A of liners.

Further, the leak-proof layer (the back sheet 3 in the liner 1B) is colored in a color different from the surface layer (the side sheet 6 in the liner 1B), and the liner 1B is colored with the leak-proof layer (the back sheet 3 in the liner 1B). The color is visible in plan view from the side. That the color of the back sheet 3 and the color of the side sheet 6 are different colors has a color difference that allows a person to fully recognize the difference between the color of the back sheet 3 and the color of the side sheet 6. Means. Specifically, the color of the surface layer (side sheet 6 in the liner 1B) measured with a color difference meter (simple spectral color difference meter NF333 (trade name) manufactured by Nippon Denshoku Industries Co., Ltd.) The measured color of the leak-proof layer (back sheet 3 in the liner 1B) means that the ΔE ^* value in the “L ^* a ^* b ^* color system” defined in JIS-Z-8729 is 3 or more. Preferably, it is 6 or more, more preferably 10 or more.

The liner 1B configured as described above has a window portion of the surface layer (side sheet 6 in the liner 1B) when the liner 1B is viewed from the surface layer (the surface sheet 2 and the side sheet 6 in the liner 1B) side. Through 61, the color of the leak-proof layer (the back sheet 3 in the liner 1B) is visible. And the color of the leak-proof layer (back sheet 3 in the liner 1B) that can be seen through the window 61, and the absorption layer (the absorber 4 in the liner 1B) of the surface layer (side sheet 6 in the liner 1B). A leak-proof layer that is visible through a region 62 other than the window portion 61 in a region outside the outer peripheral edge and in a region outside the side edge along the longitudinal direction (Y direction) of the topsheet 2 as a surface layer. The color appearance is different from the color of the back sheet 3 in the liner 1B. Here, the color 1 of the back sheet 3 seen through the window 61 and the color of the back sheet 3 seen through the region 62 other than the window 61 are different from each other in terms of the color appearance. When viewed in plan from the top sheet 2 side, there is a color difference that allows a person to fully recognize the difference between the color of the back sheet 3 seen through the window 61 and the color of the back sheet 3 seen through the region 62. It means that Specifically, the color of the back sheet 3 that can be seen through the window 61 measured with a color difference meter (such as a simplified spectral color difference meter NF333 (trade name) manufactured by Nippon Denshoku Industries Co., Ltd.) and the region 62 As for the color of the back sheet 3 that can be seen, the ΔE ^* value in the “L ^* a ^* b ^* color system” defined in JIS-Z-8729 is preferably 2.5 or more.
5 or more is more preferable, and 9.5 or more is still more preferable.

Further, in the liner 1B, the color of the back sheet 3 seen through the region 62, and the inner side of the outer peripheral edge of the absorbent layer (the absorbent body 4 in the liner 1B) of the top layer (the top sheet 2 in the liner 1B) The color appearance is also different from the color of the leak-proof layer (the back sheet 3 in the liner 1B) that can be seen through the region 23 (see FIGS. 6 and 7). Specifically, the color of the back sheet 3 seen through the region 62 measured by a color difference meter (such as a simplified spectral color difference meter NF333 (trade name) manufactured by Nippon Denshoku Industries Co., Ltd.) and the inner region 23 The color of the back sheet 3 that can be seen through the sheet is such that the ΔE ^* value in the “L ^* a ^* b ^* color system” defined in JIS-Z-8729 is preferably 10 or more, and more than 20 Is more preferable.

The effect at the time of using the liner 1B which is 2nd Embodiment of the absorbent article of this invention mentioned above is demonstrated.
About the effect of liner 1B, it is the same as that of liner 1A, and description of the effect of liner 1A is applied suitably.

  The absorbent article of the present invention is not limited to the liner 1A of the first embodiment and the liner 1B of the second embodiment, and can be appropriately changed. Moreover, each component in liner 1A-1B of the above-mentioned 1st-2nd embodiment can be implemented suitably combining in the range which does not impair the meaning of this invention.

  For example, in the liners 1A to 1B of the first to second embodiments described above, as shown in FIGS. 1 and 6, the sizes of the window portions 21 and 61 at the four corners are large, and the other window portions 21 and 61 have different sizes. Although the size is formed to be a constant size, the size of all the window portions 21 and 61 may be constant, or the size of all the window portions 21 and 61 may be different. For example, the window portions 21 and 61 may be formed so as to gradually increase from the front side B toward the rear side C, or may be formed so as to gradually decrease. Further, for example, the size of the window portions 21 and 61 may be gradually increased from the excretion portion region A toward the front side B and the rear side C, respectively, and may be formed to be gradually decreased. Also good. Further, the window portions 21 and 61 may be arranged so as to be connected by a connecting window portion having a width smaller than that of the window portions 21 and 61.

  Further, in the liner 1A of the first embodiment described above, the window portion 21 is formed only on the topsheet 2 as shown in FIG. 2, and in the liner 1B of the second embodiment described above, FIG. As shown, the window 61 is formed only on the side sheet 6, but if it is a region outside the outer peripheral edge of the absorbent layer (the absorber 4 in the liners 1A and 1B), the top sheet 2 and the side A window portion may be formed in a region where the sheet 6 overlaps.

  In addition to the panty liner, the absorbent article of the present invention can be suitably used for, for example, incontinence pads, sanitary napkins, disposable diapers and the like.

  The following absorbent articles are disclosed regarding the embodiment described above.

[1] It has a surface layer disposed on the skin facing surface side, a leakage preventing layer disposed on the non-skin facing surface side, and an absorbent layer disposed between the surface layer and the leakage preventing layer, and is worn An absorbent article having a longitudinal direction corresponding to the front-rear direction of the person and a lateral direction orthogonal to the longitudinal direction, the surface layer is in a region outside the outer peripheral edge of the absorbent layer, A window portion having a higher transparency than that of the periphery thereof is formed, the leak-proof layer is colored in a color different from the surface layer, and the absorbent article is viewed in plan from the leak-proof layer side, The color is visible, and the absorbent article is viewed in plan from the surface layer side, and the color of the leak-proof layer is visible through the window portion of the surface layer. The color of the leak-proof layer seen through a portion and the color of the leak-proof layer seen through a region other than the window portion in the outer region of the surface layer are colors. The absorbent article that the appearance is different.

[2] The absorbent article according to [1], wherein the window portion is formed by pressing the surface layer.
[3] The color of the surface layer measured with a color difference meter and the color of the leak-proof layer measured with a color difference meter have a color difference (ΔE ^* value) of 3 or more in the L ^* a ^* b ^* color system. [1] or [
2].
[4] The color of the surface layer measured with a color difference meter is any one of [1] to [3], wherein the L ^* value in the L ^* a ^* b ^* color system is white with an L ^* value of 60 or more. The absorbent article as described.
[5] The absorbent article according to any one of [1] to [4], wherein the window portion is formed with a design having design properties.
[6] The surface layer includes a liquid-permeable surface sheet, and liquid-impermeable side sheets disposed on both side portions along the longitudinal direction of the surface sheet, and the window portion includes the side sheet. The absorbent article according to any one of [1] to [5], wherein
[7] The window portion according to any one of [1] to [5], wherein an inner side in the width direction overlaps the absorbing layer and an outer side in the width direction does not overlap the absorbing layer. Absorbent article.
[8] Any of the above [1] to [5], wherein the absorbing layer is centered in the width direction and has a larger number of layers than the left and right outer sides thereof, and the window portion is arranged so as to overlap with a portion having a small total number. The absorbent article as described in any one.
[9] The absorbent article according to any one of [1] to [8], wherein the window portion is a heat seal that joins the surface layer and the leak-proof layer.
[10] The ratio of the total area of each window portion located in the region with respect to the total area of the region outside the outer peripheral edge of the absorption layer is 10% or more and 80% or less. The absorbent article of the stomach described in any one.
[11] The absorbent article according to any one of [2] to [10], wherein the window portion is formed with a border by pressing along the periphery thereof.

[12] The absorbent article according to any one of [1] to [11], wherein the leak-proof layer is provided on the outermost side on the non-skin facing side.
[13] The absorbent article according to any one of [1] to [11], wherein an outermost non-woven fabric layer is disposed on the non-skin contact surface side of the leak-proof layer.
[14] The absorbent article according to any one of [1] to [13], wherein a plurality of window portions having a predetermined width direction size are intermittently disposed along the longitudinal direction. .
[15] The absorbent article according to [14], wherein the plurality of window portions are connected by a connection window portion having a smaller size in the width direction than the window portion.
[16] The surface layer, the absorbent article according to any one of the non-woven having a basis weight of 10 to 100 g / m ² [1] to [15].
[17] The color difference ΔE between the color in the window portion and the color of the leak-proof layer seen through the region other than the window portion in the outer region is 3 or more. The absorbent article as described in any one.

1A, 1B Panty liner (absorbent article)
2 Surface sheet 21 Window part 21a Edge 21b Bottom part 22 Area | region outside the outer periphery of the absorber in a surface sheet, and area | regions other than the window part 23 23 Area | region inside the outer periphery of the absorber in a surface sheet 3 Back surface Sheet 4 Absorber 5 Peripheral seal part 6 Side sheet 61 Window part 62 Area outside the outer peripheral edge of the absorber in the side sheet and area other than the window part 21 Excretion part area B Front area C Rear area CL Vertical direction Center line extending to

Claims (7)

It has a surface layer disposed on the skin facing surface side, a leak-proof layer disposed on the non-skin facing surface side, and an absorbent layer disposed between the surface layer and the leak-proof layer. An absorbent article having a longitudinal direction corresponding to a direction and a transverse direction orthogonal to the longitudinal direction,
In the surface layer, a window portion having a higher transparency than the periphery is formed in a region outside the outer peripheral edge of the absorption layer,
The leak-proof layer is colored in a color different from the surface layer, and the color is visible when the absorbent article is viewed in plan from the leak-proof layer side,
When the absorbent article is viewed in plan from the surface layer side, the color of the leak-proof layer is visible through the window portion of the surface layer, and the leak-proof layer is visible through the window portion. And the color of the leak-proof layer seen through the region other than the window portion in the outer region of the surface layer are different in the color appearance.   The absorbent article according to claim 1, wherein the window portion is formed by pressing the surface layer. The color difference (ΔE ^* value) in the L ^* a ^* b ^* color system is 3 or more between the color of the surface layer measured with a color difference meter and the color of the leak-proof layer measured with a color difference meter. Item 3. An absorbent article according to item 1 or 2. The absorptive article given in any 1 paragraph of Claims 1-3 whose color of said surface layer measured with a color difference meter is white whose L ^* value in a L ^* a ^* b ^* color system is 60 or more.   The said window part is an absorbent article of any one of Claims 1-4 currently formed with the design which has design property. The surface layer is composed of a liquid-permeable surface sheet, and a liquid-impermeable side sheet disposed on both sides along the longitudinal direction of the surface sheet,
The absorbent article according to claim 1, wherein the window portion is formed on the side sheet.   The absorbent article according to any one of claims 2 to 6, wherein a border by the pressing is formed along the peripheral edge of the window portion.

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