JP4272864B2 - Sanitary napkin - Google Patents

Description

【００７０】
上記結果からも明らかなように、本発明に係るサンプルＮｏ．３が、装着感、ヨレ耐性、漏れ耐性の面で優れていることが判る。
【００７１】
【発明の効果】
以上詳述のとおり、本発明によれば、内側エンボス線付与部および外側エンボス線付与部の両方が適切な硬さを有する生理用ナプキンとなる。また好適な形態では、体液排出口付近の敏感肌の肌荒れ防止または装着違和感の低減と、漏れ防止とを両立できる等の利点がもたらされる。
【図面の簡単な説明】
【図１】 本発明の形態の使用面側からの展開平面図である。
【図２】 本発明の形態の断面図である。
【図３】 参考の形態の使用面側からの展開平面図である。
【図４】 参考の形態の断面図である。
【図５】 内外エンボス線付与部の硬さを異ならしめるための各種形態を示す要部拡大平面図である。
【図６】 エンボス線の各種平面配置形態を示す平面図である。
【図７】 圧搾部密度と圧縮エネルギー値との相関関係を示すグラフである。
【図８】 ＫＥＳ圧縮試験により得られる圧力と変形量との相関を示す図である。
【符号の説明】
１…生理用ナプキン、２…不透液性裏面シート、３…透液性トップシート、４…吸収コア、４Ａ…中高部、５…クレープ紙、６…サイド不織布、６Ａ…弾性伸縮部材、９Ａ〜９Ｅ…エンボス線、ｃ…圧搾部。[0001]
BACKGROUND OF THE INVENTION
  The present invention absorbs menstrual blood and prevents leakage to the back side.Sanitary napkinAbout. More specifically, at least the embossed wire composed of a plurality of pressing parts is provided on both the left and right sides of the body fluid discharge port portion as a center at least in the front-rear direction.Sanitary napkinAbout.
[0002]
[Prior art]
  As the sanitary napkin, there are so-called daytime napkins suitable for use during the day with a large amount of exercise and so-called night napkins suitable for use at bedtime. The night napkin has a shape in which the buttocks side is greatly projected to prevent back leakage that is likely to occur particularly at bedtime, and is an asymmetrical shape.
[0003]
  On the other hand, the napkin for daytime is small so that its use is not conspicuous (usually the length in the longitudinal direction is 15-20 cm for a so-called light day, 20-24 cm for a normal-long time, and for a long time. 24 to 28 cm), which is a symmetric shape. Thus, since the daytime napkin has a symmetrical shape, it can be mounted regardless of the front-rear direction.
[0004]
  In any napkin, it is the most important matter required for a product to prevent leakage in the front-rear and left-right directions.
[0005]
  There are various means for this purpose. Broadly speaking, by means of quickly squeezing the part from the liquid-permeable topsheet side to the absorbent element in the front and back and / or the side part for guiding menstrual blood into the absorbent body. By forming an embossed line composed of a plurality of compressed parts and guiding menstrual blood along the embossed line, a flap standing on the use surface side in the side part or a gather sheet provided with an elastic elastic member on the flap There are means to prevent side leakage by blocking blood. For this purpose, various concrete means have been proposed.
[0006]
  In the center of the product in the longitudinal direction (slightly forward from the center in the longitudinal direction on the night napkin extending to the heel side), embossing is formed only on the liquid-permeable top sheet mainly from the viewpoint of design, and the above menstrual blood As a means for quickly guiding the liquid into the absorbent body, there is also known one in which the liquid-permeable top sheet to the surface portion of the lower absorbent body are integrated.
[0007]
  On the other hand, the formation of the embossed line is effective not only for the induction of menstrual blood but also for improving the fit between the crotch by promoting the bending deformation of the absorbent element part, and for preventing leakage, and also for the napkin Since it is also effective in preventing the twisting when wearing, it is a technique that has been widely used in recent years. For example, as a bodily fluid absorbent article in which embossed wires composed of a plurality of pressing parts are provided in the form of extending in the front-rear direction on both the left and right sides of the body fluid discharge port site as a center, Japanese Patent Application Laid-Open No. Sho 52- No. 138398 and JP-A-2001-299812.
[0008]
[Problems to be solved by the invention]
  In such a bodily fluid absorbent article, the inner embossed line is close to the sensitive part near the bodily fluid discharge port, and the outer embossed line is close to the inner crotch.
[0009]
  However, conventionally, the inner embossed line imparting portion and the outer embossed line imparting portion have substantially the same hardness, and if one hardness is appropriate, the other hardness becomes inappropriate. Had a point.
[0010]
  For example, in the sanitary napkin, when emphasis is placed on menstrual blood induction performance by embossed wire, the width of the compressed portion of the embossed wire is inevitably increased or the compression strength is increased. However, in this case, the hardness at the inner and outer embossed line imparting portions is equally high, and the body fluid discharge port portion becomes too hard, resulting in rough skin around the body fluid discharge port. It will bring a feeling. Therefore, for example, if the hardness of the inner and outer embossed wire giving portions is set to emphasize the prevention of rough skin near the body fluid discharge port, the hardness of the inner embossed wire giving portion is appropriate, but the menstrual blood induction performance is reduced. At the same time, the hardness of the outer embossed wire imparting portion may be insufficient and may be easily twisted. On the other hand, when emphasis is placed on prevention of twisting, it becomes difficult to prevent rough skin in the vicinity of the body fluid discharge port.
[0011]
  Therefore, the main problem of the present invention is that both the inner embossed line imparting part and the outer embossed line imparting part have appropriate hardness.Sanitary napkinIs to provide. Another problem is to achieve both prevention of rough skin of the sensitive skin near the body fluid discharge port or reduction in discomfort, and prevention of leakage.
[0012]
[Means for Solving the Problems]
  The present invention that has solved the above problems is as follows.
  <Invention of Claim 1>
  An absorbent element that absorbs and holds bodily fluid is provided between the bodily fluid permeable top sheet and the bodily fluid impermeable back sheet, and
  At least on both sides of the body fluid outletIn a form extending back and forth, manyInside and outside embossed wire consisting of pressing partsAt least apartDoubly provided,Sanitary napkinBecause
  The embossed wire is formed from a number of pressing portions spaced in the longitudinal direction by pressing accompanied by thickness deformation of the absorbent element from the topsheet side,
  The compressive energy value of the inner embossed wire is higher than the compressive energy value of the embossed wire on the outer side.A bodily fluid absorbent article characterized by the above.
  Here, the compression energy value is measured using a handy compression tester, and a compression test is performed in which the center is compressed by the pressurizing unit with the center line passing through the center of the embossed wire in the width direction, and the correlation between the pressure and the deformation amount. Obtained from the figure.
  More specifically, the compression energy value referred to in the present invention refers to the width of the embossed wire with the center of the pressurizing part (circular) under the following conditions using a handy compression tester (KES-G5) manufactured by Kato Tech. It means a compression energy value WC obtained from a correlation diagram between a pressure and a deformation amount by performing a compression test in accordance with a center line passing through the center in the direction. FIG. 8 is a correlation diagram of pressure and deformation amount (X axis: mm (deformation amount), Y axis: gf / cm ² The compression energy value WC is the sum of the area value of the part a and the area value of the part b, and the unit is gfcm / cm. ² It is. This compression energy value WC means that the larger the value is, the easier it is to compress, that is, the softer the value, and the smaller the value, the harder the value.
  [Test conditions]
  SENS (recording sensitivity): 2
  Type of force meter: 1kg
  SPEED RANGE: 0.01 (cm / sec)
  DEF sensitivity: 5
  Pressurized area: 2cm ²
  Uptake interval: 0.1 (standard)
  STROKE SET: 5.0
  Maximum load: 50 gf / cm ²
[0013]
  (Function and effect)
  Increase the compression energy value of the inner embossed wire compared to the compression energy value of the outer embossed wireThus, each embossed line imparting portion can be made to have an appropriate hardness independently of each other.
[0014]
  <Invention of Claim 2>
  Compressive energy valueBy at least one of the following methods (a) to (d)Obtained by adjustingThe claim 1Sanitary napkin.
(B) Make the embossed line widths different.
(B) Different pressing area per unit length of embossed wire.
(C) Differentiate the pressing strength of the pressing parts.
(D) Differentize the planar shape of the squeezed part.
[0015]
  (Function and effect)
  The embossed wire imparting part becomes hard due to the densification of the pressing part. Therefore, specifically, by any one of the above (i) to (d) or an appropriate combination thereof,Compression energy valueCan be different.
[0016]
  <Invention of Claim 3>
  Outer embossingLineThe compression energy value is 2.0 (gfcm / cm²) And less embossed insideLineCompressive energy valueIs 2.5(Gfcm / cm²) Or more, claimsThe sanitary napkin according to 1 or 2.
[0017]
  Conventionally, this type of embossed wire imparting portion has a compression energy value of about 2.0. Here, when the embossed wire imparting portion is softened both inside and outside as described above, the leakage prevention performance is lowered due to a reduction in body fluid (including menstrual blood) induction performance and droop resistance. Therefore,Claim 3In the described invention, the compressive energy value of the outer embossed wire applying part is made equal to or less than that of the conventional one, and a certain degree of hardness is provided, while the inner embossed wire is applied while sufficiently ensuring the inducing performance of the body fluid and the twist resistance. The compression energy value of the part is 2.5 (gfcm / cm²) As described above, it is made softer than before to prevent rough skin around the body fluid discharge port. In this case, depending on the hardness of the embossed wire imparting portion on the outside, the twist resistance may be too high, which may cause the wearer to feel uncomfortable.Few.
[0018]
  <Invention of Claim 4>
  The embossed wire has an interval of 1 to 5 mm in the longitudinal direction and an area of 0.5 to 30 mm. ² The sanitary napkin according to any one of claims 1 to 3, wherein the sanitary napkin is formed from a plurality of compressed parts and has a width of 2 to 5 mm.
[0019]
[0020]
[0021]
  <Invention according to claim 5> At least the outer embossed wire has a shape that bulges from the front to the back toward the body fluid discharge port part at least in a portion corresponding to the body fluid discharge port part. ofSanitary napkin.
[0022]
    (Function and effect)
  Thus, when at least the outer embossed line is curved inward, the fit between the crotch is improved. Therefore, when this curved form is combined with a form in which the outer embossed wire imparting part is relatively hard, there is an advantage that it is difficult to give the wearer a sense of incongruity for the hardness.
[0023]
  Although the invention described in claim 5 and the invention described in claim 4 seem to contradict each other at first glance, they are actually different. In other words, whether to focus on preventing rough skin around the body fluid discharge port (so-called sensitive skin) or reducing discomfort is a matter of which user needs to make products, and technically It is a problem different from the effect. For wearers with weak sensitive skin, products with the former configuration are desirable, but for wearers with relatively strong sensitive skin, products with the latter configuration are desirable. Not surprisingly, in any case, there is no change in the technically advantageous effect.
[0024]
[0025]
[0026]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described.The details will be described.As a sanitary napkin, it is a thing for the daytime of the shape which is substantially symmetrical back and forth, or it has the wing which is extended to the buttock side, and is for the night which made the shape which the buttock side greatly projected, and the wing which protrudes to the side part Naturally, it can be applied regardless of whether it is a so-called wing type or a non-wing type sanitary napkin without a wing. Since the thing for night and the thing of a wing type sanitary napkin are known, description of a structure is abbreviate | omitted. Furthermore, the present invention can be suitably used, for example, as the above-mentioned daytime napkin, and can be suitably provided as "long-time use" having a longitudinal length of 24 to 28 cm.
[0027]
  <The present inventionForm of>
  1 and 2 show an embodiment of a sanitary napkin 1 according to the present invention, a liquid-impervious back sheet 2 made of a polyethylene sheet, a polypropylene sheet, or the like, and a permeate that quickly permeates menstrual blood or a cage. And a liquid top sheet 3. Between these both sheets 2 and 3, the absorber containing the absorption core 4 which consists of cotton-like pulp or synthetic pulp is interposed. The absorbent core 4 can be substantially entirely wrapped with a crepe paper (not shown), whereby shape retention and diffusibility can be improved. In this case, the absorbent core 4 and the crepe paper constitute the absorbent element of the present invention.
[0028]
  Side nonwoven fabrics 6 and 6 formed along the longitudinal direction are provided on both sides of the surface. Around the absorbent core 4, at the upper and lower edge portions, the outer edge portions of the liquid-impervious back sheet 2 and the liquid-permeable top sheet 3 are bonded by an adhesive such as hot melt or an adhesive means such as heat seal. In addition, the liquid-impervious back sheet 2 and the side nonwoven fabric 6 that extend laterally from the absorbent core 4 at both side edges are joined by an adhesive such as hot melt or an adhesive means such as heat seal. Has been.
[0029]
  Further, the structure and materials of the sanitary napkin 1 will be described in further detail. As the liquid-impermeable back sheet 2, a sheet material having at least a water shielding property such as an olefin resin sheet such as polyethylene or polypropylene is used. In addition, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or a nonwoven fabric sheet that is substantially impervious to liquids by interposing a waterproof film (in this case, the impervious back surface between the waterproof film and the nonwoven fabric) In general, a laminated form in which a nonwoven fabric is positioned on the outer surface of the product is employed. In recent years, those having moisture permeability tend to be used from the viewpoint of preventing stuffiness. The water- and moisture-permeable sheet material is a microporous sheet obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. There is.
[0030]
  Next, as the liquid-permeable top sheet 3, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. Examples of the material fibers constituting the nonwoven fabric include synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a lace method, a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft.
[0031]
  The liquid-permeable top sheet 3 can be given surface embossing (not shown). Since this surface embossing is given in the process before the liquid-permeable top sheet 3 is combined with the absorbent core 4, there is no deformation of the absorbent core 4 and the crepe paper, and the present invention is intended in this respect. Different from embossed line embossed.
[0032]
  The absorbent core 4 is made of, for example, fluffy pulp and a water-absorbing polymer. The water-absorbing polymer is mixed as, for example, granular powder in the pulp constituting the absorbent core. Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. Softwood pulp having a longer fiber length than hardwood pulp functions and It is preferably used in terms of price. The absorbent core 4 is flat because it is schematically shown in the drawing, but is usually formed at a middle height in which the center in the front-rear direction and the width direction bulge out relative to the surroundings in order to improve fit.
[0033]
  On the other hand, side nonwoven fabrics 6 and 6 are provided on both sides of the sanitary napkin 1 along the longitudinal direction and over substantially the entire length of the absorbent article. 6 part 6b is extended to the side, part of the liquid-impermeable back sheet 2 is extended to the side, the side nonwoven fabric 6 part extending to the side and the liquid impervious The conductive back sheet 2 portion is joined by a hot melt adhesive or the like.
[0034]
  As the side nonwoven fabric 6, a water-repellent treated nonwoven fabric or a hydrophilic treated nonwoven fabric can be used depending on the function regarded as important. For example, if importance is placed on functions such as preventing permeation of menstrual blood or vaginal discharge, or enhancing the touch feeling, water repellent treatment coated with silicon, paraffin or alkylchromic chloride water repellent If a nonwoven fabric is used, and if importance is placed on the absorption of menstrual blood in the wing-like overhanging portion, a method of polymerizing a compound having a hydrophilic group, such as an oxidation product of polyethylene glycol, in the synthetic fiber manufacturing process, Treatment with a metal salt such as stannic chloride, partially dissolving the surface to make it porous, making the synthetic fiber swell or porous, etc., and applying capillary action to make it hydrophilic The given hydrophilic treated nonwoven fabric is used. It is desirable to use a hydrophilic treated nonwoven fabric as the side nonwoven fabric 6. The side nonwoven fabric 6 can be made of natural fibers, synthetic fibers, regenerated fibers, or the like and formed by an appropriate processing method. Preferably, the side nonwoven fabric 6 is made air permeable with a reduced basis weight. Nonwoven fabric should be used.
[0035]
  The inner portions 6c of the side nonwoven fabrics 6 and 6 extend inward from the side edges of the absorbent core 4, and are bonded to the hot-melt adhesive on the liquid-permeable top sheet 3 in a double sheet state. The elastic elastic members 6A, 6A such as rubber thread are bonded in an extended state by a hot melt adhesive. The front and rear end portions in the longitudinal direction of the folded portion of the side nonwoven fabric 6 are bonded to each other in a superposed state with the hot melt adhesive, but the intermediate portion is not bonded. Therefore, in use, the folded portion is raised by the contraction force of the elastic elastic members 6A and 6A and functions as a barrier for preventing menstrual blood from leaking.
[0036]
  (Point of the present invention)
  In the present invention, the embossed wires 9A and 9B made up of a plurality of pressing parts c are provided in an inner and outer double manner in a form extending at least on the left and right sides of the body fluid discharge port part Z as a center. Is targeted.IllustratedIn this form, the inner embossed wire 9A and the outer embossed wire 9B are formed in an annular shape in a substantially elliptical shape with the body fluid discharge port part Z as the center and the longitudinal direction of the article as a major axis.
[0037]
  The embossed wires 9A and 9B according to the present invention are formed by arranging a number of compressed portions c in parallel, and mainly prevent menstrual blood from diffusing outwardly by induction of menstrual blood and twisting of articles. Provided to increase resistance. Moreover, the pressing part c of this invention is accompanied by a deformation | transformation of the absorption core 4 so that it may be clear also from FIG. 2, More specifically, the recessed part which has a depth of 10% or more of the thickness of the absorption core 4 is formed. Is.
[0038]
  The basic conditions of the pressing part c (common to the inner and outer embossed lines) are as follows. That is, the pressing depth h of the pressing part c is preferably 10% or more, particularly 30% or more of the thickness H of the absorbent core 4. The interval in the longitudinal direction of the embossed line of the pressing part c is preferably 1 to 5 mm, particularly preferably 2 to 3 mm. The width Q of the embossed wire (that is, the width of the compressed portion c) is preferably 10 mm or less, particularly 2 to 5 mm. The area of the pressing part c is 0.5 to 30 mm so that the bonding strength with the material on the back side is maintained as long as the surface texture is not impaired.², Especially 3-20mm²Embossing is desirable. Furthermore, the compression energy value of the embossed wire 9A, 9B application part is 1.0-10.0 (gfcm / cm²). The embossed wires 9A and 9B can be formed as so-called heat fusion embossing by embossing while heating from the use surface side in a state where the layers are stacked. This basic condition is common to all forms.
[0039]
  ImplementationIn this form, based on such basic conditions, as can be seen from the cross section of FIG. 2, the pressing strength of the pressing portion c of the embossed wire is made different between the inner side 9 </ b> A and the outer side 9 </ b> B. For this reason, the depth of the pressing part c differs. Specifically, the outer portion of the embossed wire 9B is formed with a pressing strength c equal to or higher than that of the conventional embossed wire 9B, and the outer embossed wire 9B applied portion has a hardness equal to or higher than that of the conventional method. Sufficient induction performance and resistance to twisting. On the contrary, the pressing part c of the inner embossed wire 9A is formed with a pressing strength lower than that of the outer side 9B, the inner embossed line 9A applying part is made softer than the outer side 9B, and the rough skin of the sensitive skin near the body fluid discharge port is made. I try to prevent it.
[0040]
  When a difference is given to the hardness of the applied portions of the outer and inner embossed wires 9A and 9B depending on the pressing strength, the difference in pressing strength is about 1 to 50% of the original thickness of the absorbent core, especially 3 to It is desirable to be about 50%. In addition, as long as the pressing part c is what was squeezed in the form by which the absorption core 4 is compressed, there is no limitation in the shape of embossing.
[0041]
  Thus, specifically, the compression energy value of the outer embossed wire 9B application portion is 2.0 (gfcm / cm²), Especially 1.7 to 1.9 (gfcm / cm²), And the compression energy value of the inner embossed wire 9A application portion is higher than this, 2.5 (gfcm / cm²) Or more, particularly 3.0 to 4.0 (gfcm / cm²) Is desirable.
[0042]
  Also, ImplementationWhen the hardness of the outer embossed wire 9B application part is equal to or higher than that of the conventional case, at least the outer embossed wire 9B is at least a portion corresponding to the body fluid outlet site Z from the front and back to the body fluid outlet site Z. If it has a shape that bulges to the side, the fit between the groins is improved, and even if the outer embossed wire 9B application portion is relatively hard, it is difficult to give the wearer a sense of incongruity. . In the illustrated form, both the inner and outer embossed lines 9A, 9B are curved inward in a bulging form with the front-rear direction extending portion having the body fluid discharge port corresponding portion as a vertex.
[0043]
  (Reference form)
  Reference formAs shown in FIG. 3 and FIG.The present inventionThe squeezing strength of the inner and outer embossed wires 9A and 9B is reversed with respect to the form. IeReference formThen, as shown in FIG. 3, the inner embossed wire 9A pressing portion c is formed with a pressing strength equal to or higher than that of the conventional one, and the inner embossing wire 9A applying portion has a hardness equal to or higher than the conventional one. In the center of the surface, the performance of preventing menstrual blood diffusion is secured. On the contrary, the pressing portion c of the outer embossed wire 9B is formed with a pressing strength lower than that of the inner side 9A, and the outer embossed wire 9B application portion is made softer than the inner side 9A, thereby making it difficult to cause a sense of incongruity in the crotch portion.
[0044]
  Specifically, the compression energy value of the embossed wire 9A application portion on the inner side is 2.0 (gfcm / cm due to the difference in the compression strength.²), Especially 1.7 to 1.9 (gfcm / cm²), The compression energy value of the outer embossed wire 9B application portion is higher than this, 2.5 (gfcm / cm²) Or more, particularly 3.0 to 4.0 (gfcm / cm²) Is desirable.
[0045]
  For referenceIn the form, it is difficult to generate a feeling of creaking between the crotch,Of the present inventionUnlike the embodiment, the longitudinally extending portions of the embossed wires 9A and 9B are straight in the longitudinal direction without bending inwardly, the inner portions of the embossed wires 9A and 9B are widened, and the width direction diffusion area of menstrual blood Is expanding.
[0046]
  (Third form)
  Not shown but aboveOf the present inventionIn formReference formSimilarly, the longitudinally extending portions of the embossed wires 9A and 9B can be linearly formed in the front-rear direction without bending inwardly.
[0047]
  (4th form)
  Although not shown,Reference formInOf the present inventionSimilarly to the form, at least the outer embossed wire 9B may be configured to have a shape that bulges from the front to the rear toward the body fluid discharge port region at least in a portion corresponding to the body fluid discharge port region Z.
[0048]
  <Various forms for different hardness>
  This invention utilizes that the pressing part c by embossing becomes hard by densification. Therefore, in order to make a difference in the hardness of the embossed wire 9A, 9B application portion in the present invention, any one of the following methods (A) to (D) or a combination thereof can be applied.
[0049]
(B) A technique to make the width of the embossed line different.
  In the present invention, it is possible to give a difference in hardness to the application portion of the inner and outer embossed wires 9A, 9B due to the difference of the widths of the embossed wires 9A, 9B (that is, the width of the compressed portion c) w1, w2 (see FIG. 1), The difference is preferably about 0.5 to 8 mm, particularly about 1 to 5 mm, when other conditions related to hardness are made common.
[0050]
  Specifically,Of the present inventionIn order to obtain the same effect as the embodiment, it is recommended that the width w1 of the inner embossed wire 9A is about 1 to 2 mm and the width w2 of the outer embossed wire 9B is about 2 to 3 mm. Also,Reference formIn order to obtain the same operational effect, it is recommended that the inner embossed wire 9A has a width of about 2 to 3 mm and the outer embossed wire 9B has a width of about 1 to 2 mm.
[0051]
(B) A technique for differentiating the compressed area per unit length of the embossed wire (hereinafter also referred to as compressed area density).
  In the present invention, as shown in FIGS. 5 (a) to 5 (f), due to the density of the compressed portion c in the embossed wire 9 (any one in the figure can be an inner embossed line and the other can be an outer embossed line). Also, it is possible to make a difference in the hardness of the inner and outer embossed wire applying portions. The pressing part c in FIG. 6A has a common shape and a central distance in the longitudinal direction, and is different only in area. Moreover, although the pressing part c of the same figure (b) has a common shape, the center space | interval and area of a longitudinal direction differ. FIGS. 3C to 3F have the same center distance in the longitudinal direction but different shapes and areas. In this embodiment, specifically, when other conditions related to hardness are made common inside and outside, it is desirable that the difference in the compressed portion density is about 1.5 to 8 times, particularly about 2 to 6 times.
[0052]
  More specificallyOf the present inventionIn order to obtain the same effect as the form, the inner embossed wire 9A has a compressed part density of 9 to 19 mm.²/ Mm, and the compressed portion density of the outer embossed wire 9B is 30 to 45 mm.²/ Mm is recommended. Also,Reference formIn order to obtain the same function and effect, the inner embossed wire 9A has a compressed part density of 30 to 45 mm.²/ Mm, and the compressed part density of the outer embossed wire 9B is 9 to 19 mm.²/ Mm is recommended.
[0053]
(C) A technique for differentizing the squeezing strength of the squeezing part.
  This is the method described above. Specifically, when other conditions related to hardness are made common inside and outside, the difference in pressing strength is about 1 to 50%, particularly about 3 to 50%, of the original thickness of the absorbent core 4 at the pressing depth h. It is desirable that
[0054]
  More specificallyOf the present inventionIn order to obtain the same effect as the embodiment, the compression strength of the inner embossed wire 9A is about 0.5 to 1.5 mm at the compression depth h, and the compression strength of the outer embossed wire 9B is 1 to 1 at the compression depth h. It is recommended to be about 2 mm. Also,Reference formIn order to obtain the same operational effect, the compression strength of the inner embossed wire 9A is about 1 to 2 mm at the compression depth h, and the compression strength of the outer embossed wire 9B is 0.5 to 1.5 mm at the compression depth h. It is recommended to set the degree.
[0055]
(D) A method of making the planar shape of the compressed portion different.
  This technique is suitable when the density of the compressed parts is changed without changing the center interval of the compressed parts c. As shown in FIG. 5, in addition to the conventional parallelogram, In addition, a circle, an ellipse, a polygon or the like can be adopted. In addition, since shapes with different lengths and widths of the compressed parts such as parallelograms and ellipses have directionality in hardness, forming the compressed parts in consideration of this, for example, the longitudinal direction of the article, the width direction, or the diagonal direction The hardness in the direction can be intensively improved or reduced. Further, conventionally, the shape of the pressed portion of the embossed wire is generally a parallelogram, but functional beauty can be brought about by adopting a circle, an ellipse, a polygon or the like.
[0056]
  <Various forms of embossed wire>
  Here, FIG. 6 shows a summary of various forms of the embossed wire targeted by the present invention. In the present invention, as long as the embossed wire is provided in both the inner and outer doubles in the form extending in the front-rear direction on both sides of the body fluid outlet, the embossed wire is added to various positions. The feature configuration of the present invention can also be applied to this additional embossed line.
[0057]
  For example, as shown in FIG. 6 (a), embossed wires 9A to 9C can be provided in a triple annular shape so as to surround the body fluid outlet portion, and all of these embossed wires 9A to 9C or of them can be provided. The hardness of the two embossed wires 9A and 9B, 9B and 9C, and 9C and 9A can be made different from each other. That is, the relationship between the outermost embossed wire 9B and the middle embossed wire 9C, the relationship between the middle embossed wire 9C and the innermost embossed wire 9A, and the relationship between the outermost embossed wire 9B and the innermost embossed wire 9A. In relation, the former corresponds to the outer embossed line of the present invention, and the latter corresponds to the inner embossed line of the present invention.
[0058]
  Of course, in the present invention, as shown in FIG. 6 (b), only the embossed wires 9A and 9B extending in the front-rear direction can be provided on both the left and right sides of the body fluid discharge port part in two rows.
[0059]
  Furthermore, as shown in FIG. 6C, the inner embossed wire 9A can be provided in an annular shape so as to surround the body fluid outlet, and the outer embossed wires 9B and 9B can be provided only on the left and right sides. In this case, only the portion of the inner embossed wire 9A corresponding to the outer embossed wires 9B, 9B can have a hardness different from that of the outer embossed wire portion. FIG. 6 (d) shows the opposite of this.
[0060]
  Further, FIG. 6 (e) shows that the outer embossed line is formed discontinuously in the extending direction. More specifically, the outer embossed line is divided into the front and rear curved embossed lines 9D, 9D and the left and right linear embossed lines. The lines 9B and 9B are separated and discontinuous. Although not shown, only the inner embossed line or both the inner and outer embossed lines can be discontinuous.
[0061]
  In addition, FIG.Of the present inventionIn order to improve the body fluid diffusion preventing performance on the front side, an auxiliary embossed line 9E along the width direction is added only between the inner and outer embossed lines 9A and 9B in the front part. In this case, the hardness of the front auxiliary embossed wire 9E imparted portion can be made different from both or one of the inner and outer embossed wires 9A and 9B. Further, although not shown, a similar auxiliary emboss line can be provided between the inner and outer emboss lines 9A and 9B in the rear instead of or together with the front auxiliary emboss line 9E.
[0062]
  <Others>
  In the present invention, as long as there is a difference in the hardness of the outer and inner embossed wire imparting portions, only a part of the embossed wire in the longitudinal direction (they are only part of the embossed wire, and the compressed and uncompressed portions in the embossed wire and It is also possible to configure such that there is a difference in hardness compared to the hardness of a part or all of the inner or outer embossed line.
[0063]
  Further, in the present invention, there may be a plurality of compressed parts in the width direction within a single embossed line.
[0064]
【Example】
  As shown in Table 1, embossed wires with different embossed wire hardness depending on the density of compressed parts are sanitary napkins of inner and outer double ring type, and embossed wires with different hardnesses of embossed wire according to compressed part density. Manufactured a single (outside only) type sanitary napkin and a sanitary napkin without an embossed wire, and measured the compression energy value of each. As a result, the correlation between the compressed part density and the compression energy value shown in FIG. 7 was obtained.
[0065]
  Moreover, the following use evaluation test, absorption evaluation test, and twist resistance evaluation test were conducted. Table 1 shows the test resultsShow.
[0066]
  (Use evaluation test)
  35 women in the monitor wear each type of sanitary napkin for 2 hours, and the feeling of wearing (feeling of both sides and feeling near the body fluid discharge port) is the closest of the following expressions. And choose the average value as the evaluation value.
[0067]
  (Absorption evaluation test)
  A napkin is fixed on an inclined flat plate with an inclination of 30 degrees in a lateral posture where the width direction is inclined along the vertical direction, and artificial menstrual blood is dropped 1 cc at an interval of 1 minute at the body fluid discharge part (center part). Until the artificial menstrual blood exceeds the outermost embossed line, that is, until the occurrence of leakage, the amount of artificial menstrual blood dripped until the occurrence of leakage is measured.
[0068]
  (Yole resistance evaluation test)
  In addition, the sanitary napkin is bent by hand, and the difficulty of twisting is evaluated in four stages (◎: difficult to twist, ○: slightly difficult to twist, Δ: slightly easy to twist, ×: easy to twist).
[0069]
[Table 1]

[0070]
  As is clear from the above results, the sample Nos.3It can be seen that it is excellent in terms of wearing comfort, twist resistance, and leak resistance.
[0071]
【The invention's effect】
  As described above in detail, according to the present invention, both the inner embossed line imparting part and the outer embossed line imparting part have appropriate hardness.Sanitary napkinIt becomes. Moreover, in a suitable form, there exists an advantage of being able to achieve both prevention of rough skin of the sensitive skin near the bodily fluid discharge port or reduction of wearing discomfort and prevention of leakage.
[Brief description of the drawings]
[Figure 1]Of the present inventionIt is an expansion | deployment top view from the use surface side of a form.
[Figure 2]Of the present inventionIt is sectional drawing of a form.
[Fig. 3]Reference formIt is an expansion | deployment top view from the use surface side.
[Fig. 4]Reference formFIG.
FIG. 5 is an enlarged plan view of a main part showing various forms for making the hardnesses of the inner and outer emboss line imparting portions different.
FIG. 6 is a plan view showing various planar arrangement forms of embossed lines.
FIG. 7 is a graph showing the correlation between the compressed part density and the compression energy value.
FIG. 8 is a diagram showing a correlation between pressure and deformation obtained by a KES compression test.
[Explanation of symbols]
  DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Liquid-impermeable back sheet, 3 ... Liquid-permeable top sheet, 4 ... Absorption core, 4A ... Middle high part, 5 ... Crepe paper, 6 ... Side nonwoven fabric, 6A ... Elastic elastic member, 9A ~ 9E ... Embossed wire, c ... Squeezed part.

Claims (5)

An absorption element that absorbs and holds bodily fluid is provided between the bodily fluid permeable top sheet and the bodily fluid impermeable back sheet, and at least extends to the left and right sides of the bodily fluid discharge port part in the front-rear direction In the sanitary napkin , the embossed wire consisting of a number of compressed parts is separated into the inside and outside and is provided at least double,
The embossed wire is formed from a number of pressing portions spaced in the longitudinal direction by pressing accompanied by thickness deformation of the absorbent element from the topsheet side,
A bodily fluid absorbent article characterized in that the compression energy value of the inner emboss wire is higher than the compression energy value of the emboss wire on the outer side .
Here, the compression energy value is measured using a handy compression tester, and a compression test is performed in which the center is compressed by the pressurizing unit with the center line passing through the center of the embossed wire in the width direction, and the correlation between the pressure and the deformation amount. Obtained from the figure. The sanitary napkin according to claim 1, which is obtained by adjusting the level of the compression energy value by at least one of the following methods (a) to (d).
(B) Make the embossed line widths different.
(B) Different pressing area per unit length of embossed wire.
(C) Differentiate the pressing strength of the pressing parts.
(D) Differentize the planar shape of the squeezed part. A compression energy value outside the embossed lines is less than 2.0 (gfcm / cm ^2), it is compressed energy values inside the embossed lines 2.5 (gfcm / cm ²⁾ or more, according to claim 1 or 2, wherein Sanitary napkin. The embossed wire has an interval of 1 to 5 mm in the longitudinal direction and an area of 0.5 to 30 mm. ² The sanitary napkin according to any one of claims 1 to 3, wherein the sanitary napkin is formed from a plurality of compressed parts and has a width of 2 to 5 mm. . The physiology according to any one of claims 1 to 4, wherein at least the outer embossed wire has a shape that bulges toward the body fluid discharge port part from the front and rear in at least a portion corresponding to the body fluid discharge port part. For napkins .

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