JP4986544B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article having a pair of left and right standing cuffs arranged in the longitudinal direction of the product, and in particular, to an absorbent article with standing cuffs suitable for combined use with auxiliary absorbent articles such as absorbent pads and incontinence pads. .

A paper diaper or the like that has a standing cuff (also called a barrier cuff) that stands on the skin contact surface side along the front-rear direction of the product (the direction from the front to the back), Absorbent articles are well known (for example, Patent Documents 1 to 3).
Absorbing pads and incontinence pads when using these absorbent articles, for the purpose of improving body fluid absorption and reducing the number of times the entire disposable diaper is replaced when urinating a small amount of urine such as light urine. In many cases, auxiliary absorbent articles such as these are used together (see Patent Documents 4 to 5).
When such an auxiliary absorbent article is used in combination, it is generally fastened between the standing cuffs such as a paper diaper so as not to disturb the function of the standing cuffs such as a paper diaper.
When fixing the auxiliary absorbent article between the standing cuffs, a method of fixing by the adhesiveness of the adhesive part formed on the non-skin contact surface or the like of the auxiliary absorbent article, or instead of the adhesive part or the adhesive part A method of fastening using an engaging means such as a mechanical fastener mechanism arranged together is common.
JP 2005-261554 A JP-A-2005-224619 JP 2001-095841 A JP 2004-261332 A JP 2002-200105 A

However, in the method of fixing by the adhesiveness of the adhesive part of the auxiliary absorbent article, it is necessary to protect the adhesive part of the auxiliary absorbent article before use with a release paper. In addition to the cumbersome operation of peeling the paper from the adhesive part to expose the adhesive part, there are many accidents in which the adhesive part adheres due to its adhesiveness before the release paper is peeled off and fixed. In some cases, it was not excellent in handling and handling.
On the other hand, those using a mechanical fastener mechanism are not excellent in fit and wearability at the time of wearing because it is necessary to dispose a highly rigid male or female material over a wide range of absorbent articles.
Further, the fastening by the adhesive or the fastening by the mechanical fastener mechanism is because the auxiliary absorbent article and the absorbent article are firmly bonded to each other, so that the replacement of the auxiliary absorbent article is troublesome and the auxiliary absorbent article is fixed. When peeled off from the absorbent article, there was a risk of damaging the adherend. In particular, when the adhesion site is composed of a non-woven fabric sheet, the next fastening property may be lowered by fuzzing.
Therefore, the main problem of the present invention is that the auxiliary absorbent article can be easily attached and detached without impairing the softness and the operability at the time of wearing, and the fastened state is suitably maintained, so that the fitting property and the leakage preventing property are excellent. It is to provide an absorbent article.

The present invention that has solved the above problems and the problems thereof are as follows.
<Invention of Claim 1>
An absorbent article in which an absorber is interposed between a liquid-permeable top sheet and an impermeable back sheet,
A pair of left and right standing cuffs extending in the front-rear direction on both sides in the width direction and having a widthwise outer portion fixed to the inner surface of the diaper and a portion on the center side in the width direction rising from the fixing start end are provided. A non-slip layer is formed on the inner surface side,
Skin the standing cuff and the portion facing and exposed non or wear of the slip layer is provided or the skin contact surface sheet abutting surface sheet,
The anti-slip layer is formed by applying or melting an anti-slip agent containing at least one of a hot melt adhesive, a thermoplastic resin, a thermoplastic elastomer, natural rubber, and a synthetic rubber to a sheet constituting the standing cuff or the skin contact surface. It is something that you wear
An absorbent article characterized by the above.

(Function and effect)
By forming a non-sticking anti-slip layer on the inner surface side of the standing cuff, when the auxiliary absorbent article is arranged between the two standing cuffs, the auxiliary absorbent article is prevented from slipping and fixed in position. , Misalignment and twisting are prevented during use.
And since the said anti-slip | skid layer is provided in the absorbent article, the auxiliary absorbent article can be fixed irrespective of the presence or absence of the adhesion part of an auxiliary absorbent article.
Furthermore, since the non-slip layer is non-wearing, it is excellent in handling and handling at the time of wearing. The risk of damage to the absorbent article when replacing the auxiliary absorbent article is also greatly reduced.
Here, in more detail about the part of the sheet that constitutes the skin contact surface that faces the standing cuff, when the part is tilted toward the center in the width direction of the product and prone, It is a part that overlaps with standing cuffs.
Further, non-adhesiveness means that it does not have a function of maintaining an adhesive state, does not substantially have adhesiveness to an auxiliary absorbent article, and preferably does not have self-adhesiveness. Those that maintain an adhesive state with the absorbent article by at least an adhesive and mechanical fastener mechanism are not said to be non-adhesive. In addition, the slip is a slip in the shearing direction in the face-to-face state.
In addition, hot melt adhesives, thermoplastic resins, thermoplastic elastomers, natural rubbers, and synthetic rubbers can, for example, be applied or fused in a pattern, and can ensure a slipperiness reducing function without adhesion due to adhesiveness. Since elasticity or elastic stretchability can be imparted, it is suitable for use in forming an anti-slip layer. The hot-melt adhesive referred to here exhibits an adhesive function when heated, but does not exhibit an adhesive function at the temperature during use.

<Invention of Claim 2>
The anti-slip layer is provided in a range from a position overlapping the side of the absorber in the standing cuff to the vicinity of the fixing start end in a state where the standing cuff is tilted toward the center in the width direction of the product and prone. The absorbent article according to claim 1.

<Invention of Claim 3 >
The slip agent is a hot melt adhesive containing silicon or the content of adhesion-imparting component is intended to include 0-10 wt% of the hot melt adhesive, the absorbent article according to claim 1 or 2 .

(Function and effect)
As the hot melt adhesive, a hot melt adhesive containing silicon or a hot melt adhesive in which the content of the adhesion imparting component is 10% by weight or less of its own weight is suitable. Here, the adhesion imparting component is generally contained for the purpose of ensuring the adhesive function of the hot melt adhesive and for the purpose of imparting viscosity at room temperature.

<Invention of Claim 4 >
The slip agent is a hot melt adhesive containing silicon or the content of adhesion-imparting component is intended to include 0-10 wt% of the hot melt adhesive, the absorbent article according to claim 1 or 2 .

(Function and effect)
By arranging in the form of dots, lines, or meshes, the roughening effect of the standing cuff or the part facing it is obtained, which contributes to a decrease in slipperiness. For example, when the layer is formed by coating or fusion, the amount of the coating material or fusion material used can be reduced.

<Invention of Claim 5 >
The absorbent article according to any one of claims 1 to 4 , wherein a static friction coefficient of the anti-slip layer forming surface is in a range of 0.30 to 2.00.

(Function and effect)
If the coefficient of static friction of the non-slip layer forming surface is in the range of 0.30 to 2.00, there is no slip when the auxiliary absorbent article is disposed, and it is possible to reliably prevent misalignment and twist during mounting. . In addition, the static friction coefficient in this invention is the value of the static friction coefficient of the said part and nonwoven fabric measured according to the horizontal method of JISP8147.

<Invention of Claim 6 >
The absorbent article according to any one of claims 1 to 5 , wherein an initial tack value of the anti-slip layer forming surface is 10 gf / 40 mm or less.

(Function and effect)
If the initial tack value with respect to cotton cloth or nonwoven fabric is 10 gf / 40 mm or less, there will be no adhesive strength to the extent that the adhesive function is substantially exhibited, and the absorbent article will be easy to handle and easy to handle.
Here, the initial tack value in the present invention is a peak value of peel strength when the test piece is peeled after being pressed.

<Invention of Claim 7 >
Color slip layer are the color different from the background color of the sheet non-slip layer is disposed, is determined can configure its presence and location by viewing the slip layer, claim 1-6 The absorbent article according to any one of the above .

(Function and effect)
If the color of the anti-slip layer is a color different from the background color of the sheet, the anti-slip layer becomes excellent in visibility, and the effect of speeding up the mounting that allows easy determination of its presence and position can be obtained.

  As described above in detail, according to the present invention, the operability and damage prevention at the time of mounting and replacement can be improved, and the auxiliary absorbent article can be fastened without slipping, and the softness and fitting properties can be secured. And the absorbent article which is excellent in leak-proof property is provided.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. The present invention relates to various kinds of disposable diapers, sanitary napkins, absorbent pads, urine pads, and other body fluid absorbent articles called stationary or pants-type, especially standing cuffs extending in the front-rear direction on both sides in the width direction. Although it will not be limited if it is an absorptive article which has, here, as shown in figure, it is a clothing mode by latching locking tapes 5 and 5 provided in both sides of a back side waist part to locking part 6 of a ventral side abdomen The fixed-type disposable diapers X1 to X6 will be described as an example. Moreover, since this invention exhibits a very useful effect when using an auxiliary | assistant absorbent article together, the example which used the absorption pad as an auxiliary | assistant absorbent article is demonstrated.

<First form>
A disposable diaper X1 of the first embodiment shown in FIGS. 1 and 2 is located on the skin side of the user and is located on the outer side of the product with the liquid-permeable surface sheet 1 constituting the skin contact surface. It forms a layer structure in which an absorbent body 3 having a certain degree of rigidity, such as a rectangular or preferably hourglass shape, is interposed between the impervious liquid-impervious back sheet 2 that does not allow permeation. And the liquid-permeable surface sheet 1 and the liquid-impermeable back sheet 2 are substantially the same shape as the planar outer shape of the paper diaper X1, and the front and rear end portions and both side portions are more than the front and rear end edges or both side edges of the absorbent body 3. It extends to the front rear or the side, and is joined at these extended portions. The joining method is not particularly limited. According to known methods. For example, it can be performed by hot melt bonding for fixing, ultrasonic sealing, heat sealing (thermal fusion), heat pressing (thermocompression bonding), or a combination thereof.
The fastening tapes 5 and 5 are provided by being adhered to both sides of the back side waist portion in the joint portion between the liquid-permeable top sheet 1 and the liquid-impervious back sheet 2. These fastening tapes 5 and 5 are known ones in which a male material of a mechanical fastener is arranged in part, and this male material part is engaged with an engaging part 6 made of a female material arranged on the ventral side. It becomes a clothing aspect.

(Liquid-permeable surface sheet)
As the liquid-permeable surface sheet 1, it is preferable to use a net-like sheet material obtained by plain weaving of yarn such as nylon or polyethylene terephthalate, a film sheet material having a large number of through holes, or a film sheet material such as polyethylene or polypropylene. It is. Moreover, a nonwoven fabric sheet can also be used as a liquid-permeable surface sheet. As such a nonwoven fabric sheet, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, regenerated fibers such as rayon and cupra, natural fibers such as cotton, spunlace method, spunbond method, thermal bond method And those processed by an appropriate processing method such as a melt blown method or a needle punch method. Of the nonwoven sheet processing methods, the spunlace method is excellent in terms of flexibility and drape, and the thermal bond method is excellent in terms of being bulky and soft. The liquid-permeable surface sheet may have a layer structure such as an SMS nonwoven fabric sheet, a point bond nonwoven fabric sheet, or a laminated nonwoven fabric sheet obtained by laminating a plastic film having pores and a nonwoven fabric.

(Impermeable back sheet)
The liquid-impermeable back sheet 2 is made of a sheet material having at least a liquid shielding property such as an olefin resin sheet such as polyethylene or polypropylene. Alternatively, a microporous air-permeable resin 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 can also be used. . In addition, a laminated nonwoven fabric sheet in which a nonwoven fabric is laminated on a polyethylene sheet or the like, a nonwoven fabric sheet in which a substantially non-liquid permeability is ensured through a waterproof film, and the like can be used. As the liquid-impervious back sheet, a laminate in which an exterior sheet made of a nonwoven fabric or the like is laminated on the outer surface of the resin sheet is more preferably used in order to improve touch.

(Absorber)
The absorbent body 3 is a sheet-like fiber base material in which an absorbent polymer is interspersed and is covered with a cover sheet (not shown) to maintain its shape. The material of the covering sheet is not particularly limited as long as it has a property of permeating body fluid. For example, the same material as exemplified as the liquid-permeable surface sheet 1 can be used.
The total weight of the absorbent polymer in the absorber 3 is 200 to 500 g / m ² , preferably 300 to 400 g / m ² , particularly preferably 330 to 340 g / m ² . If the total weight of the absorbent polymer 31 is less than 250 g / m ² , the body fluid absorption function as an absorbent article may be insufficient, and if it exceeds 500 g / m ² , the weight is excessive and the cost is high. There is a risk of becoming.

(Sheet fiber substrate)
The sheet-like fiber base material is preferably a non-woven fabric, but in addition, a pile fiber pulp can be used. If it is a nonwoven fabric sheet, it is desirable that it is a nonwoven fabric sheet with a density of 0.01-0.25 g / cm < ³ >. When the density of the fiber base material is within the range of the present invention, the absorbent polymer is preferably interspersed.
Specific examples of non-woven sheets include synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, spunlace method, spunbond method, airlaid Processed by an appropriate processing method such as a method, a point bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. In particular, an air-through nonwoven fabric is particularly suitable because it is bulky, has a high porosity, and can easily disperse a sufficient amount of absorbent polymer, and can quickly form a polymer layer on the surface of a fiber substrate. .
When a piled pulp is used as the sheet-like fiber base material, the raw material is not particularly limited. For example, known materials such as cotton-like pulp and synthetic pulp can be exemplified. Moreover, the raw material fiber of a pulp is not specifically limited, For example, the cellulose fiber obtained from woods, such as a mechanical pulp, a chemical pulp, and a dissolving pulp, Artificial cellulose fibers, such as rayon and an acetate, etc. can be illustrated. However, wood, which is a raw material for cellulose fibers, is preferable in terms of functions and cost, such as a void-forming surface, because conifers have a longer fiber length than hardwoods.

(Absorbing polymer)
Specific examples of the absorbent polymer include carboxymethyl cellulose, polyacrylic acid and salts thereof, crosslinked acrylate polymer, starch-acrylic acid graft copolymer, starch-acrylonitrile graft copolymer hydrolyzate, A cross-linked polymer such as oxyethylene cross-linked product, carboxymethyl cellulose cross-linked product, polyethylene oxide, polyacrylamide or the like, or a copolymer of isobutylene and maleic acid is preferably used. What added the blocking inhibitor in order to suppress the blocking property by moisture absorption of a product can also be used. Absorbent polymers include various forms such as powders, particles, granules, pellets, sols, suspensions, gels, films, and non-wovens. Can also be used in the present invention, and particulates are particularly preferably used.

(Standing cuffs)
On the other hand, the disposable diaper X1 of the present embodiment is a standing cuff (also referred to as a barrier cuff) that is raised along the longitudinal direction on the skin side by elastic elastic members 41, 41 for lifting provided along the longitudinal direction (front-rear direction). 4) on both sides in the width direction. The standing cuffs 4, 4 are composed of standing sheets 40, 40 that are substantially continuous in the width direction, and one or a plurality of lifting elastic elastic members 41, 41 made of, for example, rubber thread. The
The standing cuffs 4 and 4 of the present embodiment have the standing sheets 40 and 40 folded into short double folds, and the two elastic elastic members 41 and 41 for lifting are not shown in the figure. The other end side of the standing sheets 41, 41 has a fixing start end 4s at a predetermined position of the liquid-permeable surface sheet 1, and is impermeable from the fixing start end 4s. In the direction of the joining edge with the liquid sheet 2, the outer portion in the width direction is appropriately fixed with a hot-melt adhesive H for fixing.
Accordingly, the fixing start end 4s forms an upright line of the upright cuff 4, and the tip side of the upright line is a free portion F that is not fixed to the product body. The width of the free portion F of the standing cuff 4 is desirably 30 mm or more.
In addition, the longitudinal front and rear end portions of the upright sheet 40 are fixed to the article with the leading end of the free portion toward the center in the width direction of the article, specifically, to the outer surface of the top sheet by a fixing hot melt adhesive not shown. Thus, the standing cuff is configured to tilt to the center in the width direction and overlap the liquid-permeable surface sheet when the lifting elastic members 41, 41 are extended.
The standing sheet 40 that forms the standing cuffs 4 is preferably not liquid-permeable but liquid-permeable or hydrophobic. Further, the liquid-permeable sheet may be repelled by silicon treatment or the like. In addition, the specific raw material of the sheet | seat for standing can use the thing similar to the raw material of the above-mentioned liquid-permeable surface sheet or liquid-impermeable back sheet.
Further, as the material of the elastic elastic member 41 for lifting, a thread-like elastic rubber made of styrene rubber, olefin rubber, urethane rubber, polyurethane, polystyrene or the like is preferably used. The lifting elastic elastic member has a thickness of 1000 dtex or more, particularly preferably 1000 to 2000 dtex, and is fixed to the standing sheet in an extended state of 150 to 300%, particularly preferably 200 to 250%.

(Anti-slip layer)
Here, the paper diaper of this embodiment has an anti-slip layer 7 formed on the inner surface of the standing cuff 4 as a characteristic feature. Slip layer 7, without adhesion to the auxiliary absorbent article, contact time layer der to reduce the slipperiness of the is, preferably, a higher coefficient of friction than the material of the standing sheet 40 layers, Or it is a layer which has the effect of improving the friction coefficient as the whole inner surface of the standing cuff 4. In particular, it is desirable that the anti-slip layer is a layer having elasticity or elastic stretchability so that a further anti-slip effect can be exhibited by being pressed by body pressure at the time of wearing.
The anti-slip layer 7 of this embodiment is provided in such a manner that an anti-slip agent is applied to the entire inner surface of the standing cuff 4. Here, the inner side surface of the standing cuff 4 is a surface on the side facing the liquid-permeable surface sheet 1 when the standing cuff 4 is tilted to the center in the width direction and overlapped with the liquid-permeable surface sheet 1. It is.
The anti-slip layer 7 is non-adhesive and has no adhesiveness to the auxiliary absorbent article. In addition, non-adhesiveness means that it does not have a function of substantially maintaining an adhesive state.
As the anti-slip agent, a hot melt adhesive, a thermoplastic resin, a thermoplastic elastomer, natural rubber, synthetic rubber, or a material containing these is suitable. Hot-melt adhesives containing silicon, particularly hot-melt adhesives with a content of an adhesion-imparting component of 0 to 10% by weight (preferably 0 to 5% by weight, especially 0% by weight), natural rubber, Synthetic rubber is suitable because it can ensure non-wearing properties, has a certain degree of elasticity, can maintain good softness and fit, and can effectively reduce slipperiness with clothing.
The hot melt adhesive in this technical field is typically used for fixing and adhering sheets, and usually includes a base polymer, a solid adhesion imparting component at normal temperature, a plasticizer component and an antioxidant as constituent components. At least. The hot-melt adhesive as the anti-slip agent in the present invention includes the same constituents.
The adhesion-imparting component is particularly used for exhibiting adhesion during heating, and a general hot-melt adhesive contains about 11% by weight to about 60% by weight of this adhesion-imparting component. When used as the anti-slip agent of the present invention, it is particularly desirable to make it less than 10% by weight as described above. Specific examples of adhesion-imparting components include rosin resins, polyterpene resins, terpene phenol resins, dicyclopentadiene petroleum resins, aliphatic petroleum resins, aromatic petroleum resins, copolymer petroleum resins, alicyclic rings. Examples thereof include one or a mixture of two or more selected from the group consisting of group petroleum resins, xylene resins and elastomers.
As the plasticizer component, waxes are suitable. Examples of such waxes include paraffin waxes, microcrystalline waxes, polyethylene waxes, polypropylene waxes, by-product polyethylene waxes, Fischer-Tropsch (Fischer -Tropsch) waxes, oxidized Fischer-Tropsch waxes and functionalized waxes such as hydroxy stearamide waxes and fatty acid amide waxes are preferably used. Especially in the field of absorbent articles, the use of synthetic high melting point waxes including high density low molecular weight polyethylene waxes, by-product polyethylene waxes and Fischer-Tropsch waxes is suitable. Moreover, modified waxes such as vinyl acetate modified and maleic anhydride modified, and oxidized wax can also be used. If waxes are used, they should be added in an amount of about 10% to about 60% by weight, more preferably 25% to 45% by weight, and still more preferably 30% to 40% by weight. The melting point of the wax to be used is 49 to 93 ° C, preferably 54 to 77 ° C, particularly preferably 63 to 74 ° C.
On the other hand, antioxidants used in hot melt adhesives include high molecular weight hindered phenols and polyfunctional phenols such as sulfur and phosphorus containing phenols. Representative hindered phenols are 1,3,5-trimethyl-2,4,6-tris- (3,5-di-tert-butyl-4-hydroxybenzyl) -benzene, pentaerythrityl tetrakis-3. (3,5-di-t-butyl-4-hydroxyphenyl) -propionate, n-octadecyl-3 (3,5-di-t-butyl-4-hydroxyphenyl) -propionate, 4,4′-methylenebis ( 2,6-t-butyl-phenol), 4,4′-thiobis (6-t-butyl-o-cresol), 2,6-di-t-butylphenol, 6- (4-hydroxyphenoxy) -2, 4-bis (n-octyl-thio) -1,3,5 triazine, (di-n-octylthio) ethyl 3,5-di-t-butyl-4-hydroxy-benzoate, or sorbitol Sa [3- (3,5-di -t- butyl-4-hydroxy - phenyl) - propionate] is.
In addition, antioxidants can be used together with known synergists such as thiodipropionate esters and phosphites. These serve to further enhance the performance of the antioxidant. In particular, distearyl thiodipropionate is useful. These stabilizers are generally used in an amount of about 0.1 to 1.5% by weight, preferably 0.25 to 1.0% by weight.
In addition, as a base polymer of a hot melt adhesive or as a single thermoplastic resin for forming an anti-slip layer, a styrene block copolymer, a polyurethane block copolymer, a polyester block copolymer, or a polyamide block copolymer is used. Either a polymer or a copolymer blend can be suitably used. As the styrene block copolymer, styrene-butadiene-styrene (S-B-S) or styrene-ethylenebutadiene-styrene (S-EB-S) can be used. As the copolymer blend, styrene-ethylenebutadiene-styrene / polypropylene (S-EB-S / PP) or polypropylene / ethylene-propylene (PP / EP) can be used. In addition, polyolefin-based thermoplastic resins can also be used. As the polyolefin-based material, any of polyamide-based, polyester-based, polyethylene-based, and polypropylene-based materials can be used.
The application method of the anti-slip agent is not particularly limited, and an appropriate coating machine or a printing machine can be used depending on the viscosity of the anti-slip agent. The thermal fusion method, which is often used when using hot-melt adhesives, is applied by heat fusion after heat-spreading after spreading a solid material, or thermocompression bonding with pressure and heat, either alone or together with the previous application method. be able to. Embossing can also be performed during thermocompression bonding.
The basis weight of the slip agent 7, point 1-200 g / m ² from the softness retention, preferably it is preferable to the 3~100g / m ^2. The thickness is preferably 3 to 200 μm, preferably 10 to 100 μm, from the viewpoint of maintaining softness. If it is less than 1 μm, there is a risk of peeling when a shearing force is applied to the clothing, and if it is too thick, the rigidity becomes high and it is not preferable from the viewpoint of ensuring softness.
On the other hand, it is desirable that the inner side surface (antislip layer forming surface) of the standing cuff of the present embodiment has a static friction coefficient in the range of 0.30 to 2.00, preferably in the range of 1.0 to 1.8. If the coefficient of static friction is less than 0.30, it will be slippery, and if it exceeds 2.00, damage to the standing cuffs, such as fuzzing of the nonwoven fabric, may occur, and there will be strong contact with the absorbent pad due to movement of the wearer. When a shearing force is applied, a buffering effect due to deviation cannot be obtained, and the rising cuff 4 may be twisted to reduce the leakage prevention effect. In addition, it is more desirable that the dynamic friction coefficient is in the range of 0.25 to 1.5, preferably 0.50 to 1.25.
For reference, when the present inventors measured the coefficient of friction of the commercial diapers of the commercial diapers, the coefficient of static friction was less than 0.20 and the coefficient of dynamic friction was less than 0.18. In this embodiment, since the anti-slip layer is formed on the entire inner surface of the standing cuff, the target portion (range) of the dynamic friction coefficient is all the anti-slip layer forming portion (range). In an example in which the pattern is arranged, the range in which the non-slip layer forming portion and the non-forming portion are mixed is the target range of the dynamic friction coefficient.
Here, the dynamic friction coefficient referred to in the present invention is a value of the dynamic friction coefficient between the portion and the nonwoven fabric, which is measured according to the horizontal method of JIS P 8147. More specifically, the nonwoven fabric has a basis weight in the range of ²⁰ to 22 g / m ² , a fineness in the range of 2.0 to 2.1 dtex, and is measured based on the horizontal method of JIS P 8147. A nonwoven fabric having a dynamic friction coefficient of 0.05 to 0.07 and a static friction coefficient of 0.019 to 0.021 is used. A PE / PP hydrophilic air-through nonwoven fabric is particularly suitable as such a nonwoven fabric. Next, for the measurement operation, the moving speed during measurement is set to 300 mm / min.
On the other hand, the paper diaper X1 of this embodiment has an initial tack value of 10 gf / 40 mm or less, preferably 5 gf / 40 mm or less, on the inner side surface (antislip layer forming surface) of the standing cuff. If it exceeds 10 gf, the tackiness is increased, and the protective release paper becomes essential or the function of adhering to unintended parts is exhibited, and the handling property and handling property are deteriorated.
Here, the initial tack value referred to in the present invention means that a test piece having a width of 50 mm and a length of 90 mm is placed on a non-slip layer-forming surface on a cotton cloth (gold width 3) or a nonwoven fabric cut into a width of 80 mm and a length of 100 mm ( After stacking so that the width (40 mm x length 40 mm) is on the cotton cloth side, etc., a 2 kg roll is rolled on the test piece 3 times in the length direction to apply pressure, and then the test piece is tested from one end with a tensile tester. It is the peak value of peel strength when the is peeled. The peeling rate during the peeling operation was 300 mm / min, and the initial tack value = 0 when no peak value was observed during the measurement. When using a non-woven fabric, the same one used in the method for measuring the static friction coefficient is used.
Here, the initial tack value referred to in the present invention is for cotton cloth or non-woven fabric, but the initial tack value [PE] for the polyethylene sheet (PE sheet) is 100 gf / 40 mm, preferably less than 50 gf / 40 mm. It is even more desirable. The initial tack value [PE] may be measured by changing the initial tack value cotton cloth or the like to a 30 g / m ² PE sheet. Moreover, although the initial tack value [PE] is a higher value than that for the cotton cloth or the like, even if the initial tack value [PE] is such that the surface smoothness and surface strength of the PE sheet are higher than the cotton cloth or the like, There is no problem of handling properties due to fastness or adhesiveness.
Here, when the present inventors measured the initial tack value of the adhesive fastening part in the back surface sheet of some commercially available absorbent pads, it exceeded 95 gf / 40 mm for all cotton fabrics and nonwoven fabrics. The initial tack values [PE] were all over 980 gf / 40 mm.

(Hot melt adhesive for fixing)
As the fixing hot melt adhesive H for fixing the standing sheet 40 from the fixing start end 4s, a conventionally known one can be used. For example, styrene block copolymers, polyurethane block copolymers, polyester block copolymers, polyamide block copolymers, base polymers of copolymer blends, rosin resins, polyterpene resins, terpene phenols Resin, dicyclopentadiene-based petroleum resin, aliphatic petroleum resin, aromatic petroleum resin, copolymerized petroleum resin, alicyclic petroleum resin, xylene resin, elastomer, etc. Those containing at least a plasticizer component such as waxes, an antioxidant, and a base polymer as constituent components are preferably used.
In the drawing, for the sake of convenience, the fixing hot melt adhesive H is shown only for the fixing start end 4s, but of course, the fixing hot melt adhesive is disposed at other appropriate places.

(Sheet diffusion member)
On the other hand, in the paper diaper X1 of this embodiment, sheet-like diffusion members 50 and 50 made of a nonwoven fabric sheet are provided on both the front surface side and the back surface side of the absorbent body 3 as a suitable example. If the sheet-like diffusion member 50 is provided on the front surface side, it may be the front surface side or the back surface side of the covering sheet. In addition, although the sheet-like diffusion members 50 and 50 are provided on both the front and back surfaces of the absorber in the illustrated example, they may be provided on either one or may not be provided. The sheet-like diffusion members 50 and 50 are preferably formed of an air-through nonwoven fabric sheet. By providing such a sheet-like diffusing member, body fluid such as urine and blood quickly diffuses over the entire surface of the absorber, so that the entire absorber is suitably used effectively.

(Pulp layer)
Moreover, in this form, as a suitable example, there is a pulp layer 60 in which the piled pulp is formed into a sheet shape on the back surface side of the absorbent body 3 and on the back surface side further than the sheet-like diffusion member 50 on the back surface side. Is provided. By disposing the pulp layer 60, the body fluid absorption rate is increased and the body fluid absorption capacity is increased. As the pile fiber, the pile fiber shown as being used for the above-mentioned sheet-like fiber base material can be used. Note that this piled pulp may not be present.

(Second seat)
In addition, a so-called second sheet, which is a so-called second sheet, can be disposed between the absorbent body 3 and the liquid-permeable surface sheet 1 so as to diffuse and permeate body fluid. The material of the second sheet is sufficient if it exhibits this body fluid diffusion / permeability. For example, the same material as the liquid-permeable surface sheet 1 can be exemplified, but the second sheet has a liquid-permeable surface. Those having superior body fluid permeability than the sheet are particularly preferred, and nonwoven fabrics having a fiber density smaller than that of the liquid-permeable surface sheet 1 are particularly preferred.

(Absorption pad)
The absorbent pad P1 as an auxiliary absorbent article is a general one having a liquid-permeable top sheet 10, a liquid-impervious back sheet 20, and an absorbent core 30 interposed therebetween as shown in the drawing. . As a layer structure, the structure similar to the paper diaper of the said description can be taken. As the shape, a known shape such as a rectangle or an hourglass shape in a plan view is adopted.
On the other hand, the absorbent pad preferably does not require a fastening part, but in the case of the present embodiment, a sheet for constituting the skin contact surface of the paper diaper. A landing part may be formed. In this case, the position and size of the fastening portion can be determined as appropriate according to the prior art, but in the present embodiment, the size and range can be much smaller than that.

<Second form (reference form)>
In the 1st form of the said description, although it is an example which provided the anti-slip layer in the standing cuff, the paper diaper X2 of this form provided the anti-slip layer on the liquid-permeable surface sheet 1 as shown in FIG. It is a form. That is, this is an example in which the anti-slip layer 7 is provided, for example, by applying an anti-slip agent to a portion that overlaps with the standing cuff 4 when the standing cuff 4 is tilted to the center in the width direction. The basic composition of the anti-slip agent that can be used and other paper diapers is the same as in the first embodiment.
In the paper diaper X2 of this embodiment, since the liquid-permeable surface sheet 1 constitutes the skin contact surface, the anti-slip layer is formed on the liquid-permeable surface sheet 1, but the basic layer structure of the paper diaper is the same as that of this embodiment. As long as they are different from each other, the anti-slip layer may be formed not on the liquid-permeable surface sheet 1 but on other sheets constituting the skin contact surface.

<Third embodiment>
Although the said 1st and 2nd form X1, X2 is a form in which the anti-slip layer 7 is formed in either the standing cuff 4 or the liquid-permeable surface sheet 1, the paper diaper X3 of this form is FIG. As is apparent from FIG. 2, the anti-slip layers 7 and 7 are formed on both of them. In addition, also in this form X3, the composition of the anti-slip agent that can be used and other paper diapers can be the same as those in the first form.

<Other forms>
In the paper diapers X1 to X3 of the above example, the example in which the anti-slip layer is formed on the entire inner surface of the standing cuff 4 or the solid part of the predetermined part of the liquid-permeable surface sheet 1 is shown. From the viewpoint of ensuring the air permeability of the standing cuff 4 and the liquid-permeable surface sheet 1 and the softness of the absorbent article, various arrangement patterns are possible as shown in FIGS. Can be provided.
Here, the ratio of the anti-slip layer 7 to the entire inner surface of the standing cuff or the entire portion facing the standing cuff is preferably 2% or more in area ratio (%). If it is 2% or more, an anti-slip effect can be obtained. This means that when the present inventors provide a line-shaped anti-slip layer 7 with a width of 1 mm in the width direction on the inner surface of the standing cuff of a commercially available paper diaper, the surface area of the standing cuff is approximately 2%. This is based on the fact that the improvement of the anti-slip effect was found at this time.
As an arrangement pattern of the anti-slip layer 7, for example, as shown in FIG. 5, it is arranged in a dot shape, or a plurality of anti-slip layers 7 are provided in a line along the width direction of the product as shown in FIG. Can be. Or as shown in FIG. 7, the anti-slip | skid layer 7 may be provided so that it may become a mesh pattern.
Moreover, it is desirable that the anti-slip agent layer 7 is colored. For example, in the case of the above-described whole-surface application form, the portion where the anti-slip layer 7 is formed can be visually determined instantaneously. Furthermore, if the anti-slip layer arranged in various patterns is colored in a color that is different from the background color of the sheet, it can be clearly seen that the anti-slip layer is formed and the anti-slip effect can be obtained. I can feel it. The coloring can be achieved, for example, by adding a known coloring agent to the anti-slip agent.
As described above in detail, any absorbent article according to this embodiment exhibits a suitable anti-slip effect, and exhibits a function of preventing a deviation or a deviation when the auxiliary absorbent article is mounted and a leakage caused by such a deviation. The

  INDUSTRIAL APPLICABILITY The present invention can be used for an absorbent article that can be used together with an absorbent pad, a urine collection pad, or the like.

It is a front view of the paper diaper with the standing cuff which concerns on a 1st form. It is the II-II sectional view. It is a partial cross section figure of the form (2nd form) which has a slip prevention layer in a liquid-permeable surface sheet. It is a partial cross section figure of the form (3rd form) which has an anti-slip layer in both a standing cuff and a liquid-permeable surface sheet. It is a figure which shows the example by which the non-slip | skid layer is distribute | arranged to dot shape. It is a figure which shows the example by which the non-slip | skid layer is distribute | arranged to line shape. It is a figure which shows the example by which the non-slip | skid layer is distribute | arranged to the stitch shape.

  DESCRIPTION OF SYMBOLS 1 ... Liquid-permeable surface sheet, 2 ... Liquid-impermeable back sheet, 3 ... Absorber, 4 ... Standing cuff, 4s ... Base end edge (adhesion start end), 5 ... Fastening tape, 6 ... Locking part, 7 ... Anti-slip layer (anti-slip agent application part), 15 ... fastening part, 40 ... standing sheet, 41 ... elastic elastic member for lifting, 50 ... sheet-like diffusion member, 60 ... pulp layer, P1 ... absorbing pad, H ... Fixing hot melt adhesive, L ... standing wire, X1-X3 ... fastening paper diaper.

Claims (7)

An absorbent article in which an absorber is interposed between a liquid-permeable top sheet and an impermeable back sheet,
A pair of left and right standing cuffs extending in the front-rear direction on both sides in the width direction and having a widthwise outer portion fixed to the inner surface of the diaper and a portion on the center side in the width direction rising from the fixing start end are provided. A non-slip layer is formed on the inner surface side,
Skin the standing cuff and the portion facing and exposed non or wear of the slip layer is provided or the skin contact surface sheet abutting surface sheet,
The anti-slip layer is formed by applying or melting an anti-slip agent containing at least one of a hot melt adhesive, a thermoplastic resin, a thermoplastic elastomer, natural rubber, and a synthetic rubber to a sheet constituting the standing cuff or the skin contact surface. It is something that you wear
An absorbent article characterized by the above.   The anti-slip layer is provided in a range from a position overlapping the side of the absorber in the standing cuff to the vicinity of the fixing start end in a state where the standing cuff is tilted toward the center in the width direction of the product and prone. The absorbent article according to claim 1. The slip agent is a hot melt adhesive containing silicon or the content of adhesion-imparting component is intended to include 0-10 wt% of the hot melt adhesive, the absorbent article according to claim 1 or 2 . The absorbent article according to any one of claims 1 to 3 , wherein the anti-slip layer is arranged in a dot shape, a line shape, or a mesh shape. The absorbent article according to any one of claims 1 to 4 , wherein a static friction coefficient of the anti-slip layer forming surface is in a range of 0.30 to 2.00. The absorbent article according to any one of claims 1 to 5 , wherein an initial tack value of the anti-slip layer forming surface is 10 gf / 40 mm or less. Color slip layer are the color different from the background color of the sheet non-slip layer is disposed, is determined can configure its presence and location by viewing the slip layer, claim 1-6 The absorbent article according to any one of the above .

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