JP5430914B2 - Absorbent articles - Google Patents

Description

  The present invention relates to absorbent articles such as sanitary napkins, panty liners, incontinence pads and the like for absorbing menstrual blood and vaginal discharge, and more particularly to absorbent articles that prevent the flap portion from being turned over during and during the mounting operation. .

  Conventionally, as an absorbent article N such as a sanitary napkin, a panty liner, a cage sheet, an incontinence pad, for example, as shown in FIG. 11, a back sheet 50 made of a polyethylene sheet or a polyethylene laminated nonwoven fabric, a nonwoven fabric or An absorbent body 52 made of cotton-like pulp is interposed between the liquid-permeable surface sheet 51 made of a permeable plastic sheet or the like, and the back sheet 50 and the top sheet 51 are joined around the absorbent body 52. In addition, a structure in which a flap portion 53 without the absorber 52 is formed is known.

In recent years, various types of absorbent articles N have been proposed as this type of absorbent article N in order to prevent the flap 53 from being turned over, bent, or wrinkled. For example, in the following Patent Document 1, a joint part that joins the top sheet part and the back sheet part is formed along the outer edge of the absorbent article, and a plurality of first seal parts and one or a plurality of first parts are formed. An absorptive article provided with 2 seal parts and a 2nd seal part being lower rigidity than the 1st seal part is indicated. Moreover, in the following patent document 2, the heat seal part to which the front surface material and the back surface material are joined has unevenness, and the unevenness is the pitch of the recesses or protrusions in the longitudinal direction or the width direction of the absorbent article. Or the absorbent article from which an area differs is disclosed.
JP 2007-135940 A Japanese Patent No. 3611761

  However, the part where the flap part is turned over and the way of turning are different between the series of installation work from taking out the absorbent article to pulling up the shorts and during the installation after the installation is completed. Regardless, the absorbent articles described in Patent Documents 1 and 2 do not take this point into consideration, and therefore, the flap portion may be turned over either during or during the mounting operation.

  The flaps, bends, wrinkles, and the like that occur in the flap portion have caused problems such as being uncomfortable when hitting the body, and being apt to cause friction between the skin and the turned-up portion.

  Furthermore, in the absorbent articles described in Patent Documents 1 and 2, since the seal portion is formed along the outer edge of the absorbent article, the outer edge may hit the skin and the wearing feeling may deteriorate.

  Accordingly, a main object of the present invention is to provide an absorbent article that prevents the flap portion from being turned over during the mounting operation and during the mounting, and has an improved mounting feeling.

In order to solve the above-mentioned problem, the present invention according to claim 1 is a flap in which an absorber is interposed between a liquid-permeable top sheet and a liquid-impervious back sheet, and at least both sides do not have an absorber. parts are formed Rutotomoni, each side portion, in the absorbent article wing-shaped flaps are formed to be fixed so as to involve the crotch portion of the undergarment when worn,
The flap portion region on the rear side of the wing-shaped flap has a flap portion width-enlarging region in which the width of the flap portion is gradually enlarged as going to the rear side, and the rear side of the wing-shaped flap. In the flap portion region, the flap portions on both sides are respectively positioned at intermediate positions of the width of the flap portion and spaced apart from the side edge end of the absorbent article and the side edge end of the absorbent body. The emboss is formed over a predetermined length range along the part, and the emboss formed in the longitudinal rear side region of the absorbent article is relatively the longitudinal direction of the absorbent article. is formed in an area larger than the embossed formed in the front region, and the formed longitudinally rear region of relatively absorbent article, embossing the absorbent relatively large area Of the embossing formed on both sides of the article, the absorbent article, characterized in that located in the rearmost side it is provided.

The invention described in claim 1 has been made in view of the actual use of the fact that the portions where the turning is likely to occur during the mounting operation and during the mounting are the flap portions on both sides. Specifically, in the present invention, first, the flap portion region on the rear side of the wing-shaped flap has a flap portion width enlarged region in which the width of the flap portion is gradually enlarged toward the rear side. And the emboss is formed in the flap part area | region of the back side rather than the said wing-shaped flap, respectively. This is to prevent curling caused by wrinkling of the absorbent article that is greatly curved in the front-rear direction along the roundness of the body during the wearing of the absorbent article. That is, by forming embosses in the flap portions on both sides, the stiffness of the flap portions in this portion is increased, so that no turning is generated.

  Moreover, in this invention, the embossing formed in the longitudinal direction front side area | region of an absorbent article is relatively compared with the embossing formed in the longitudinal direction rear side area | region of an absorbent article among the embossments formed in the flap part of this both sides. The embossing formed in a larger area and in the relatively rear longitudinal region of the absorbent article is located on the most rear side among the embossments formed on both sides of the absorbent article. Yes. This is to prevent the flap portion of the rear region that is likely to be a starting point of turning from the point of securing the functionality of the absorbent article during the mounting operation of the absorbent article. As a result, it is possible to prevent turning over in the flap portion during and during the mounting operation. The size relationship between the embossing formed in the longitudinal rear side region of the absorbent article and the embossing formed relatively in the longitudinal front side region of the absorbent article is an average value of the embossing width or the embossing area. Can be compared.

  Further, in the present invention, the emboss formed on the flap portion is formed along the flap portion at an intermediate position of the formation width of the flap portion. That is, the emboss is formed at an intermediate position separated from the side edge end of the absorbent article and the side edge end of the absorbent body. This is because when the embossing is formed up to the side edge end of the absorbent article, the end of the hardened embossing may directly contact the skin, which may cause a deterioration in the wearing feeling. Is formed from the side edge of the absorbent body, the wrinkles in the width direction formed on the absorbent body that curves along the roundness of the body can easily extend to the flaps on both sides through embossing, resulting in turning over. This is because it becomes easier. Thereby, the wearing feeling of an absorbent article can be improved.

  As the present invention according to claim 2, the emboss is formed in a continuous line shape along the flap portion, and is gradually formed wider toward the rear side in the longitudinal direction of the absorbent article. An absorbent article is provided.

  The invention according to claim 2 is an embodiment in which the emboss is formed in a continuous line shape along the flap portion. At this time, by forming the emboss so as to gradually widen toward the rear side in the longitudinal direction of the absorbent article, it is possible to effectively prevent turning during and during the mounting operation.

  As the present invention according to claim 3, there is provided the absorbent article according to claim 1, wherein the emboss is intermittently formed along the flap portion.

  The invention according to claim 3 is an embodiment in which the emboss is intermittently formed along the flap portion. By forming the embosses intermittently, it becomes easier to follow the roundness of the body.

  The present invention according to claim 4 is the absorption according to claim 3, wherein the interval between the adjacent embosses is larger in the rear region where the embossed area is formed larger than the emboss formed in the front region. A sex article is provided.

  When the emboss is intermittently formed along the flap portion, the distance between the adjacent embosses is larger than the emboss interval of the front region in the rear region where the area of the emboss is formed larger. This is an example of a large form. Thereby, deterioration of the feeling of touch by forming a large area comes to be improved.

  As the present invention according to claim 5, the emboss is formed such that a line connecting adjacent embosses is zigzag or waved along the longitudinal direction of the flap portion. The absorbent article described is provided.

  The invention according to claim 5 is an embodiment in which a line connecting adjacent embosses is formed in a zigzag shape or a wave shape. As a result, the emboss can be formed in a wider area than when the lines are neatly arranged on a straight line, and the entire flap portion can be stiffened to prevent turning over more effectively.

  The absorbent article according to any one of claims 1 to 5, wherein, as the present invention according to claim 6, a part of the embossment in the front region where the area of the emboss is formed smaller is formed with a larger area than the adjacent emboss. Is provided.

  The invention described in claim 6 is an embodiment in which a part of the emboss is formed in a larger area than the adjacent emboss in the front region where the area of the emboss is small. As a result, the embossed stiffness also appears in the middle of the front region, making it difficult for the flap portion to break.

As the present invention according to claim 7, wherein the embossing has the claim 7 the absorbent article according to any one of claims 1 to 6, it is also formed in the flap portion of the front side than the wing-shaped flaps are provided in serial mounting of the invention, but also to the front side than the U queuing shaped flap so as to form embossed.

  As described above in detail, according to the present invention, it is possible to provide an absorbent article that prevents turning over in the flap portion during the mounting operation and during the mounting, and improves the mounting feeling.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a partially broken development view of a sanitary napkin 1 according to the present invention, and FIG. 2 is a view taken along the line II-II in FIG.

The sanitary napkin 1 includes a liquid-impervious back sheet 2 made of a polyethylene sheet, a polypropylene sheet, etc., a liquid-permeable front sheet 3 that allows permeation of menstrual blood, cages, and the like, and a space between the two sheets 2 and 3. An absorbent body 4 made of cotton-like pulp or synthetic pulp intervening in the sheet, crepe paper 5 surrounding the absorbent body 4 for maintaining the shape and improving the diffusibility of the absorbent body 4, and longitudinally on both sides of the surface. It is comprised from the side nonwoven fabrics 7 and 7 formed along the direction. Around the absorber 4, at the upper and lower edge portions, the outer edge portions of the liquid-impervious back sheet 2 and the liquid-permeable surface sheet 3 are joined 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 7 that extend laterally from the absorbent body 4 at both side edges thereof are bonded to each other by an adhesive such as hot melt or an adhesive means such as heat seal. In addition, flap portions F ₁ and F ₂ where the absorber 4 does not exist are formed on the outer periphery.

Hereinafter, the structure of the sanitary napkin 1 will be described in detail.
As the liquid-impermeable back sheet 2, a sheet material having at least water shielding properties 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 (in this case, the waterproof film and the nonwoven fabric constitute a liquid-impervious back sheet) can be used after substantially impervious to liquid imperviousness by interposing a waterproof film. In recent years, those having moisture permeability tend to be used from the viewpoint of preventing stuffiness. This water- and moisture-permeable sheet material is a microporous sheet obtained by forming a sheet by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, and then stretching in a uniaxial or biaxial direction. It is.

  Next, as the liquid-permeable surface 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.

  The absorbent body 4 interposed between the liquid-impervious back sheet 2 and the liquid-permeable top sheet 3 is made of, for example, fluffy pulp and a water-absorbing polymer. The water-absorbing polymer is mixed in the pulp constituting the absorber, for example, as granular powder. Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolved 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.

  Further, synthetic fibers may be mixed in the absorbent body 4. As the synthetic fiber, for example, polyolefins such as polyethylene or polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used. It may be a mixture. In addition, a composite fiber such as a core-sheath fiber, a side-by-side fiber, or a split fiber having a fiber having a high melting point as a core and a fiber having a low melting point as a sheath can also be used. In the case of a hydrophobic fiber, it is desirable to use a synthetic fiber that has been surface-treated with a hydrophilizing agent so as to have an affinity for body fluids.

  When the crepe paper 5 surrounding the absorbent body 4 is provided as in this example, the crepe paper 5 is interposed between the liquid-permeable surface sheet 3 and the absorbent body 4 as a result. The crepe paper 5 which is excellent in diffusing body fluids quickly prevents reversal of menstrual blood and the like. In particular, in the present invention, as described in detail later, one of the purposes is to reduce the uncomfortable feeling when the napkin is attached, and therefore the thickness of the absorbent body 4 should be in the range of about 0.5 to 2 mm. Preferably, the manufacturing method of the absorbent body 4 is preferably a piled pulp or an airlaid absorbent body so as to be rich in flexibility. In addition, although not shown in figure, the absorber 4 is good also as a middle-high structure where the blood-evacuation port corresponding | compatible part swelled.

  On the other hand, side non-woven fabrics 7 and 7 are provided on both sides of the sanitary napkin 1 along the longitudinal direction and almost the entire length of the napkin 1, respectively. Wing-like flaps W, W are formed by a part of the liquid-impervious back sheet 2 that extends sideways and also extends sideways.

  As the side nonwoven fabric 7, a water-repellent treated nonwoven fabric or a hydrophilic treated nonwoven fabric can be used from the viewpoint of an important function. 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 It is desirable to use a nonwoven fabric. Further, if importance is attached to the absorption of menstrual blood and the like in the wing-shaped flaps W, W, a method of polymerizing a compound having a hydrophilic group, for example, an oxidation product of polyethylene glycol, in the process of producing a synthetic fiber, , By treating with a metal salt such as stannic chloride, partially dissolving the surface to make it porous, and depositing metal hydroxides to swell or make the synthetic fiber porous, applying capillary action to make it hydrophilic It is desirable to use a hydrophilic treated non-woven fabric provided with.

In the present invention, among the flap portions F ₁ and F ₂ formed on the outer periphery, the flap portions F ₂ on both sides are respectively along the flap portion F at the intermediate position of the formation width of the flap portion F ₂ and predetermined. Are formed in a predetermined pattern over the length range, and of these embosses 20, embosses 21, 21... Formed in the longitudinal rear region of the sanitary napkin 1 are formed in the longitudinal front region. It is formed with a larger area than the embosses 22, 22.

  More specifically, FIG. 3 is an enlarged view of the flap portion F2 where the emboss 20 of FIG. 1 is formed. In the sanitary napkin 1 according to the present invention, first, the embosses 20 are respectively formed on the flap Fa on the rear side of the napkin among the flap portions F2 on both sides. This is to prevent turning-up that is likely to occur during the mounting after the sanitary napkin 1 is mounted. That is, the flap portion Fa often turns over due to the sanitary napkin 1 being greatly bent in the front-rear direction along the roundness of the body during wearing, and particularly as shown in the illustrated example. In the case of the sanitary napkin 1 in which the wing-shaped flaps W, W are formed, the flaps on the rear side of the wing-shaped flaps W, W are often turned over. Therefore, by forming the emboss 20 along the flap portion Fa, the stiffness of this portion increases, and it is possible to prevent turning during mounting.

  Further, in the sanitary napkin 1 according to the present invention, among the embosses 20 formed in the flap portion Fa, the embosses 21, 21. It is formed with a larger area than the embosses 22, 22... Formed in the region (flap portion Fa-flap portion Fb). This is intended to prevent turning-up that is likely to occur during a series of mounting operations from when the sanitary napkin 1 is taken out to when the shorts are pulled up. That is, since the flap portion Fb is likely to be a starting point of turning, the embossing in this region is formed with a larger area than other portions, thereby preventing turning at the time of wearing. Here, it is preferable that the emboss 21 formed on the flap portion Fb is formed 5 to 20 times, preferably about 10 to 20 times larger than the other emboss 22.

  At this time, it is desirable that the emboss 20 is provided at an intermediate position of the formation width of the flap portion Fa, that is, a position separated from the side edge end portion of the sanitary napkin 1 and the side edge end portion of the absorbent body 4. The reason for this is as follows. That is, if the emboss 20 is formed up to the side edge of the sanitary napkin 1, the end of the hardened emboss may come into direct contact with the skin, which causes a deterioration in wearing feeling. In addition, when formed from the side edge of the absorbent body 4, wrinkles in the width direction formed on the absorbent body 4 that curves along the roundness of the body easily extend to the flap parts Fa on both sides through the emboss 20. It becomes easy to turn over.

  The emboss 20 can be formed in various patterns. For example, as shown in FIG. 1, the embossing 20 (the embossing 22) is formed in a circular or elliptical dot shape, and the embossing 21 formed on the flap portion Fb, which is likely to be turned over when mounted, has a relatively large area. It can be a flower pattern or the like. In particular, the embossing 21 formed on the flap portion Fb that is likely to be turned over when worn is a pattern (flower pattern shape, star shape, pentagonal shape, etc.) that expands toward the outside of the sanitary napkin 1, thereby increasing the embossed area. Even if it is small, it is possible to produce a larger stiffness, and it is easy to deal with any direction, which is preferable.

In the flap portion F _2, such as a hot melt adhesive, so as to bond the backsheet 2 and the topsheet 3 by a different means from the joining means by the embossing 20. That is, it is desirable that the emboss 20 does not have a sealing function. Thereby, hardening of the embossing 20 can be prevented and a touch feeling improves.

Material constituting the flap portion F ₂ of the embossing 20 is formed, by using a bulky, such as air-through, it becomes easier to form embossed, preferred for the hardness of the embossed hardly feel on the skin. In the example shown in FIG. 1, side nonwoven fabrics 7 and 7 are provided on both sides of the sanitary napkin 1, respectively, so that the side nonwoven fabric 7 and the back sheet 2 are joined to the flap portion. Emboss 20 is applied. In the case of a sanitary napkin in which no side nonwoven fabric is provided, the emboss is applied to the flap portion where the top sheet 3 and the back sheet 2 are joined.

  By the way, the said embossing 20 can be formed with a various form, as FIG. 4-10 shows.

In the embodiment shown in FIG. 4, the emboss 20 is formed in a continuous line shape that is long in the longitudinal direction of the sanitary napkin 1 on the flap portions F ₂ on both sides, and the longitudinal rear side of the sanitary napkin 1. It is formed gradually wider toward By forming the emboss 20 so as to gradually become wider toward the rear side in the longitudinal direction of the sanitary napkin 1, it is possible to effectively prevent turning during and during the mounting operation.

In the embodiment shown in FIG. 5, the embossing 20 is intermittently formed along the flap portion F _2. By forming the embossed part 20 intermittently, it becomes easy to follow the roundness of the body.

In the embodiment shown in FIG. 6, the embossing 20, while being intermittently formed along the flap portion F _2, the embossed portion 20 is formed in a pattern no corners, such as circular or oval. By forming the embossed portion 20 in a pattern having no corners such as a circle or an ellipse, the contact with the skin is softened and the wearing feeling is improved.

In the embodiment shown in FIG. 7, the emboss 20 is intermittently formed along the flap portion F ₂ , and the rear region where the embossed area is formed is larger in the interval between adjacent embosses. It is formed larger than the front region. Thereby, deterioration of the feeling of touch by forming a large area comes to be improved.

In the embodiment shown in FIG. 8, the emboss 20 is formed such that a line connecting adjacent embosses 20, 20... Is zigzag along the longitudinal direction of the flap portion F ₂ . As shown in FIG. 4, when the emboss 20 is formed in a continuous line shape, the outer shape line of the emboss 20 along the flap portion F is formed in a zigzag shape or a wave shape. Thereby, even when the emboss 20 is formed with a small area, the emboss can be formed over a wide width region, so that the entire formation width of the flap portion F can be stiffened and turned over more effectively. Can be prevented.

In the embodiment shown in FIG. 9, in the front region where the area of the emboss is formed small, a part of the emboss 23 is formed with a larger area than the adjacent embosses 22 and 22. Thus out stiffness at emboss 23 parts, it is less likely to break the flap portion F _2. Here, it is preferable that the emboss 23 is formed about 5 to 20 times larger than the adjacent embosses 22 and 22. Further, as shown in FIG. 4, when the emboss 20 is formed in a continuous line shape, an enlarged portion may be formed in the middle.

In the embodiment shown in FIG. 10, the emboss 20 is also formed in the flap portion F ₂ on the front side of the wing-shaped flap W. This makes it possible to prevent curling of the flap portion F ₂ in front of the wing-shaped flaps W.

[Other examples]
(1) In the above-described embodiment, the embosses 20 and 20 are formed only on the flap portions F ₂ and F ₂ on both sides of the sanitary napkin 1, respectively, but the front and rear flap portions F ₁ and F ₁ are also embossed. 20 may be formed. Thereby, it is possible to prevent the front and rear flap portions F ₁ and F _{1 from being} turned over. Further, the embossing 20 can be formed on the outer periphery of the wing-shaped flaps W, W.

It is a partial fracture development view of sanitary napkin 1 concerning the present invention. It is the II-II arrow directional view of FIG. It is an enlarged view of the embossing 20 formation part of FIG. It is an expanded view of the sanitary napkin 1 which shows the example (the 1) of the embossing. It is an expanded view of the sanitary napkin 1 which shows the example (the 2) of the embossing. It is an expanded view of the sanitary napkin 1 which shows the example (the 3) of the embossing 20. It is an expanded view of the sanitary napkin 1 which shows the example of a form of the embossing 20 (the 4). It is an expanded view of the sanitary napkin 1 which shows the example (the 5) of the embossing 20. It is an expanded view of the sanitary napkin 1 which shows the form example (the 6) of the embossing. It is an expanded view of the sanitary napkin 1 which shows the example (the 7) of the form of the emboss. It is a partially broken development view of the conventional absorbent article N.

1 ... sanitary napkin, 2 ... liquid-impermeable back sheet, 3 ... liquid-permeable surface sheet 4 absorber 5 crepe paper, 7 ... side nonwoven, 20, 21, 22, 23 ... embossing, _{F 1}・ F ₂・ Fa ・ Fb ... Flap part, W ... Wing flap

Claims (7)

With the absorber is interposed between the liquid-permeable topsheet and liquid-impermeable back sheet, it is formed a flap portion in the absence of the absorber at least in both side portions Rutotomoni, each side portion, underwear when worn In the absorbent article formed with a wing-shaped flap that is fixed so as to involve the crotch part ,
The flap portion region on the rear side of the wing-shaped flap has a flap portion width-enlarging region in which the width of the flap portion is gradually enlarged as going to the rear side, and the rear side of the wing-shaped flap. In the flap portion region, the flap portions on both sides are respectively positioned at intermediate positions of the width of the flap portion and spaced apart from the side edge end of the absorbent article and the side edge end of the absorbent body. The emboss is formed over a predetermined length range along the part, and the emboss formed in the longitudinal rear side region of the absorbent article is relatively the longitudinal direction of the absorbent article. is formed in an area larger than the embossed formed in the front region, and the formed longitudinally rear region of relatively absorbent article, embossing the absorbent relatively large area Absorbent article of the embossing formed on both sides of the goods, characterized in that it is located on the most rear side.   2. The absorbent article according to claim 1, wherein the emboss is formed in a continuous line shape along the flap portion, and is gradually formed wider toward the rear side in the longitudinal direction of the absorbent article.   The absorbent article according to claim 1, wherein the emboss is formed intermittently along the flap portion.   The absorbent article according to claim 3, wherein an interval between the adjacent embosses is formed larger in the rear region where the area of the emboss is larger than in the front region.   The said embossing is an absorbent article in any one of Claims 1-4 currently formed so that the line | wire which connected adjacent embossing may become zigzag shape or a wave shape along the longitudinal direction of a flap part.   The absorbent article according to any one of claims 1 to 5, wherein a part of the embossment in the front region formed with a small area of the emboss is formed with a larger area than the adjacent emboss. The said emboss is an absorbent article in any one of Claims 1-6 currently formed also in the flap part ahead rather than the said wing-shaped flap.

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