JP5944953B2 - Absorbent articles - Google Patents

Description

  The present invention mainly relates to absorbent articles used for incontinence pads, sanitary napkins, vaginal sheets, medical pads, toiletries, disposable diapers, and the like, and has grid-like embossments provided in a grid-like pattern. The present invention relates to an absorbent article.

  Conventionally, as the absorbent article, an absorbent body is interposed between a liquid-impermeable back sheet such as a polyethylene sheet or a polyethylene sheet-laminated nonwoven fabric and a liquid-permeable surface sheet such as a nonwoven fabric or a liquid-permeable plastic sheet. It has been known.

  Numerous improvements have been made to this type of absorbent article, preventing body fluid absorbed by the absorber from diffusing inside the absorber and leaking from the end, and blocking the body fluid that travels on the surface to absorb the absorber. Various types of embossing with various patterns have been proposed for the purpose of absorbing and holding them. As one of the emboss patterns, a lattice emboss imparted in a lattice shape in plan view is known. This lattice-like embossing has an advantage that it is excellent in the damming effect of body fluids, and since the squeezed parts and the non-squeezed parts are alternately formed, it is difficult to feel the hardness due to the squeezing and the wearing feeling is excellent.

  For example, in the following Patent Document 1, the vertical embossed recesses extending from the substantially central part in the longitudinal direction of the absorber to the ventral side and the back side on both ends in the longitudinal direction of the absorbent body, A plurality of fluids are formed at predetermined intervals in the width direction, and body fluid is diffused widely to the abdomen and the dorsal side of the longitudinal embossed recess in the abdomen and dorsal side of the absorber. An absorptive article is disclosed in which a diffusion embossed depression to be formed is formed, and the diffusion embossed depression is formed with an oblique grid-like embossed depression inclined with respect to the longitudinal direction of the absorbent body.

  Moreover, in the following Patent Document 2, an absorber is disclosed in which concave portions in an oblique direction with respect to the longitudinal direction are disposed at both ends of the longitudinal intermediate portion.

Japanese Patent No. 4008868 JP 2012-143535 A

  However, since the grid-like embossing disclosed in Patent Documents 1 and 2 has an embossing groove intersecting at the intersection of the grids, there is no escape path to disperse the pressure when squeezed with an embossing roll during the manufacturing process. Wrinkles in the material and distortion of the embossed grooves are likely to occur. In addition, the embossing groove of the product bites into the embossing convex part of the embossing roll and the product wraps around the embossing roll, or paper dust accumulates at the corner of the intersection of the embossing roll and clogging occurs. There was a problem that the operability of time deteriorated.

  Also, at the intersection of the embossing grooves of the grid-like embossing, it will be excellent in humor blocking effect, but since the diffusion of the body fluid to the outer side is completely stopped, the inner side of the intersection Therefore, there is a problem that body fluid tends to accumulate and the absorption capacity of the entire absorbent body is reduced.

  By the way, when the lattice direction of the lattice-like embossing is a regular lattice arranged along the longitudinal direction and the width direction of the absorbent article, and the line conveyance direction during the manufacturing process (MD direction) is the longitudinal direction of the absorbent article, At the time of squeezing with the embossing roll, the linear pressure is high at the part where the embossed groove along the width direction of the absorbent article is formed, and the linear pressure is low at the part where only the embossed groove in the longitudinal direction is formed. Since the difference became large, the surface material was easily broken, wrinkled, distorted, and the like. In addition, when arranged in a regular lattice, when the absorbent article is deformed along the roundness in the front-rear direction or the width direction of the body, the absorbent article is not easily deformed by the rigidity of the embossed groove, and the hardness is reduced when worn. I sometimes felt it.

  Then, the main subject of this invention is providing the absorbent article which was excellent in the operativity of embossing processing, was highly effective in the spreading | diffusion prevention of a bodily fluid, and was given the embossing which is hard to feel hardness at the time of mounting | wearing.

In order to solve the above problems, as the present invention according to claim 1, in an absorbent article in which an absorber is interposed between a liquid-permeable top sheet and a back sheet,
In the plan view, a lattice-like embossment and a linear line-like emboss are formed on the absorber only from the surface side, or the envelope and the envelope sheet surrounding the absorber are encapsulated. It is formed from the surface side of the sheet, or is formed from the surface side of the liquid-permeable surface sheet to the absorber, the encapsulating sheet and the liquid-permeable surface sheet,
The grid-like embossing is provided with intermittent portions where the embossing grooves are intermittently provided at each crossing portion of the grid, and the grid direction is arranged in a rhombus shape inclined with respect to the longitudinal direction and the width direction of the absorbent article, and Each of the front and rear regions of the region corresponding to the body fluid discharge portion is provided in a region along the width direction of the absorbent article, and is not provided in the region corresponding to the body fluid discharge portion,
The linear embossing is provided along the longitudinal direction of the absorbent article on both sides of the region corresponding to the body fluid discharge part, and both ends are connected to both sides of the grid-like embossing. An absorbent article is provided.

  According to the first aspect of the present invention, in the absorbent article provided with the lattice-like emboss, an intermittent portion where the emboss groove is intermittent is provided at each intersection of the lattice of the lattice-like emboss, and the emboss groove is divided at the intermittent portion. Since the pressure applied to the surface material when squeezed with an embossing roll is dispersed in the intermittent portion during the manufacturing process, wrinkles on the surface material and distortion of the embossed groove do not occur, and the embossing It is possible to prevent the groove from biting into the embossing roll and winding the product around the embossing roll. Further, since no intersecting portion is formed in the embossed groove, problems such as paper powder clogging at the corner of the intersecting portion can be solved, and the operability of embossing can be improved.

  In addition, in the lattice-like embossing, a body fluid damming effect can be obtained in each lattice portion, but since the embossed grooves are intermittent in the intermittent portion, a part of the body fluid dammed by the lattice is also on the outside. Since it diffuses, the body fluid is absorbed and held in a wide range of the absorber, and the absorption capacity of the body fluid can be improved while maintaining the diffusion preventing effect of the body fluid.

  Further, in the present absorbent article, since the lattice direction of the lattice-shaped emboss is arranged in a rhombus shape inclined with respect to the longitudinal direction and the width direction of the absorbent article, the embossed grooves are formed with respect to the line conveying direction. Since it is formed at the same ratio and the linear pressure at the time of embossing is almost equalized, the surface material can be prevented from being broken, wrinkled, twisted, and the like. Also, even when the absorbent article is deformed along the roundness in the front-rear direction or the width direction of the body, the direction of the lattice is not formed in a direction parallel to this, so the absorbent article is difficult to deform due to the rigidity of the lattice. Can be prevented, and it becomes difficult to feel the hardness at the time of wearing.

  Moreover, in the invention according to the first aspect, since the lattice embossing is provided in the region along the width direction of the absorbent article in the front and rear regions of the region corresponding to the body fluid discharge part, the front and rear leakage of the body fluid is ensured. Will be able to prevent.

Further, in the invention described in claim 1 wherein, when providing the lattice-like embossing, since the provided as absorbent body embossing is applied from the surface side of the front of the absorber of laminating a liquid-permeable topsheet, an internal absorber The diffusing body fluid can be reliably dammed up.

  According to a second aspect of the present invention, there is provided the absorbent article according to the first aspect, wherein the intermittent portion has a length of 2 to 5 mm.

  In the invention according to claim 2, the length of the intermittent portion where the embossed groove is intermittent at each crossing portion of the lattice is set to 2 to 5 mm, so that the pressure can be appropriately dispersed during the embossing and the body fluid is blocked. The body fluid can be appropriately diffused outward without impairing the effect.

According to a third aspect of the present invention , at least the liquid-permeable surface sheet and the encapsulating sheet surrounding the absorbent body along the longitudinal direction on the skin contact surface side of the region corresponding to the body fluid discharge portion, A ditch is formed from the surface side of the liquid surface sheet ,
The absorbent article according to any one of claims 1 and 2 , wherein the lattice-shaped emboss is provided in a region before and after the groove.

In the invention according to claim 3 , by forming the concave groove in the region corresponding to the body fluid discharge portion, body fluid that is dripped at a stretch is received instantaneously, body fluid is temporarily stored in the concave groove, and the body fluid is absorbed by the body. It is easy to absorb and hold.

  As described above in detail, according to the present invention, it is possible to provide an absorbent article having an embossing operability, a high body fluid diffusion preventing effect, and embossing that is difficult to feel hardness when worn.

It is a partially broken developed view of the incontinence pad 1 according to the present invention. It is the II-II arrow directional view of FIG. It is a top view of embossing. FIG. 4 is an enlarged plan view of a lattice emboss 23. (A) is the conventional lattice-shaped embossing, (B) is an enlarged plan view of the lattice-shaped embossing 23 according to the present invention. (A) is the conventional lattice-shaped embossing, (B) is an enlarged plan view of the lattice-shaped embossing 23 according to the present invention. It is the figure (the 1) which compared the performance by an emboss pattern. It is the figure (the 2) which compared the performance by an emboss pattern. It is the figure (the 3) which compared the performance by an emboss pattern.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Basic configuration of incontinence pad 1]
As shown in FIGS. 1 and 2, an incontinence pad 1 according to the present invention includes a liquid-impervious back sheet 2 made of a polyethylene sheet, a liquid-permeable top sheet 3 that allows urine and the like to permeate quickly, and these Absorbent body 4 made of cotton-like pulp or synthetic pulp interposed between both sheets 2 and 3, and crepe paper or non-woven fabric surrounding the absorbent body in order to maintain the shape and improve the diffusibility of the absorbent body 4 And the like, a hydrophilic second sheet 6 disposed between the liquid-permeable surface sheet 3 and the absorber 4 as necessary, and a substantially side edge portion of the absorber 4 standing upright. From the side nonwoven fabrics 7 and 7 that form a pair of left and right three-dimensional gathers BS and BS provided as base ends and projecting toward the skin side in a predetermined section in the longitudinal direction so as to include at least the body fluid discharge site H Configured and said In the periphery of the collector 4, the outer edge portion of the liquid-impervious back sheet 2 and the liquid-permeable surface sheet 3 is joined at the edge in the longitudinal direction 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. Has been.

Hereinafter, the structure of the incontinence pad 1 will be described in detail.
The liquid-impervious back sheet 2 is made of a sheet material having at least water-impervious properties such as polyethylene and polypropylene, but in addition to this, a non-woven sheet after securing a substantially liquid-impervious property through a waterproof film. (In this case, a liquid-impervious back sheet is composed of the waterproof film and the nonwoven fabric). In recent years, those having moisture permeability tend to be suitably used from the viewpoint of preventing stuffiness. The water- and moisture-permeable sheet material is a microporous material obtained by melting and kneading an inorganic filler in an olefin-based resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. A sheet is preferably used.

  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 is composed of, for example, absorbent fibers such as fluffy pulp and the superabsorbent polymer 8, and in the illustrated example, the planar shape is an oblong shape that is long in the longitudinal direction of the pad. The superabsorbent polymer 8 is, for example, granular powder, and is dispersed and mixed in the pulp constituting the absorber 4.

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. In this incontinence pad 1, since the absorbent body 4 is surrounded by the encapsulating sheet 5, the encapsulating sheet 5 is interposed between the liquid-permeable surface sheet 3 and the absorbent body 4 as a result. The excellent encapsulating sheet 5 quickly diffuses body fluids and prevents the urine and the like from returning. Basis weight of the ^{pulp, 100g / m 2 ~600g / m} 2, and it is preferably a ^{200g / m 2 ~500g / m 2} .

  Examples of the superabsorbent polymer 8 include a cross-linked polyacrylate, a self-crosslinked polyacrylate, a saponified acrylate-vinyl acetate copolymer cross-linked product, and a cross-linked isobutylene / maleic anhydride copolymer. , A crosslinked polysulfonate, and a partially crosslinked water-swellable polymer such as polyethylene oxide and polyacrylamide. Among these, those based on acrylic acid or acrylate that are excellent in water absorption and water absorption speed are preferred. In the production process, the superabsorbent polymer having the water-absorbing performance can be adjusted in absorption capacity (water-absorbing power) and absorption rate by adjusting the crosslinking density and the crosslinking density gradient.

  The absorbent body 4 may be mixed with synthetic fibers. 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.

  The encapsulating sheet 5 can be a paper material such as tissue or a liquid-permeable sheet such as a nonwoven fabric. In particular, it is preferable to use a nonwoven fabric that does not easily cause destruction (breaking) of materials. When using a non-woven fabric, a non-woven fabric processed by a spunbond method or an SMS method, particularly a non-woven fabric processed by an SMS method, is preferred because of its excellent balance between thinness and strength. In the encapsulating sheet 5, the hydrophilicity of the sheet is not particularly limited as long as at least the skin contact surface side (surface side) of the absorbent body 4 is not water-repellent.

  The second sheet 6 only needs to be hydrophilic to body fluids. Specifically, by using recycled fibers such as rayon and cupra, natural fibers such as cotton, the material itself has hydrophilicity, or synthesis of olefins such as polyethylene or polypropylene, polyesters, polyamides, etc. The fiber which surface-treated with the hydrophilizing agent and provided the hydrophilic property can be used. Further, the second sheet 6 may have a porous film layer on the back surface side (absorber 4 side) in order to give a firmness, and a material containing pulp may be used.

  Side nonwoven fabrics 7 and 7 are provided on both sides of the surface of the incontinence pad 1 along the longitudinal direction and over the entire length of the incontinence pad 1, and the outer portions of the side nonwoven fabrics 7 and 7 extend laterally. The liquid-impermeable back sheet 2 is laterally extended, and the side nonwoven fabric 7 portion and the liquid-impermeable back sheet 2 portion that are extended to the side are formed by a hot melt adhesive or the like. Joined to form side flaps.

  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 the penetration of urine, etc. or enhancing the feeling of touch, such as SSMS, SMS, and SMMS coated with a silicon-based, paraffin-based, or alkylchromic chloride-based water repellent It is desirable to use a water-repellent non-woven fabric, and if importance is attached to the absorbability of body fluids, a method of polymerizing a compound having a hydrophilic group, such as an oxidation product of polyethylene glycol, in the synthetic fiber production process, Treating with metal salt such as stannic, partially dissolving the surface to make it porous and making the synthetic fiber swell or porous by applying a metal hydroxide, etc., applying capillary action to impart hydrophilicity It is desirable to use a hydrophilic treated nonwoven fabric. As this side nonwoven fabric 7, what was formed by a proper processing method using natural fiber, synthetic fiber, regenerated fiber, etc. as a raw material can be used.

  The side nonwoven fabrics 7 and 7 are appropriately folded, and a pair of left and right inner solid gathers 10 and 10 that stand on the skin side with the position near the side edge of the absorbent body 4 as a standing base end, and the inner side relatively A pair of left and right outer three-dimensional gathers 11 standing on the skin side formed by the liquid-impervious back sheet 2 and the side nonwoven fabric 7 that are located outside the three-dimensional gather 10 and extend laterally from the absorbent body 4, 11 is a three-dimensional gather BS having a double gather structure. Note that the three-dimensional gather BS may have a single gather structure including only the inner three-dimensional gather 10 or the outer three-dimensional gather 11, or a three-dimensional gather standing up on the skin side simply by disposing the side nonwoven fabric 7. It does not have to be formed into a shape.

  The structure of the inner three-dimensional gather 10 and the outer three-dimensional gather 11 will be described in more detail. As shown in FIG. 2, the side nonwoven fabric 7 is folded back on both sides in the width direction toward the back side of the pad. In the illustrated example, one or a plurality of double sheet portions 7a and 7b are formed on the outer side, and both ends or appropriate positions in the longitudinal direction are fixed inside the double sheet portion 7a on the inner side in the width direction. One or a plurality of thread elastic elastic members 12 are arranged in the double sheet portion 7b on the outer side in the width direction, and two appropriate positions in the longitudinal direction are fixed. Of the liquid-permeable surface sheet 3, in which the base end portion of the double sheet portion 7 a on the inner side in the width direction is disposed on the side portion of the absorbent body 4. While being bonded by a hot-melt adhesive or the like, the base end portion of the double sheet portion 7b on the outer side in the width direction is hot on the side end portion of the liquid-impermeable back sheet 2 that extends to the side of the absorbent body 4. By being bonded by a melt adhesive or the like, the inner solid gathers 10 are formed on the skin side by the double sheet portion 7a on the inner side in the width direction, and the skin side is formed by the double sheet portion 7b on the outer side in the width direction. An outer three-dimensional gather 11 that stands up is formed. As shown in FIG. 1, the side nonwoven fabric 7 is not provided with the elastic elastic members 12 and 13 at both ends in the pad longitudinal direction, and the double sheet portion 7a on the inner side in the width direction is hot. It is joined to the absorber 4 side by a melt adhesive or the like.

[Emboss]
In the incontinence pad 1, as shown in FIG. 3, a lattice-like emboss 23 in a lattice shape is given to a predetermined region in plan view. The lattice-shaped emboss 23 is provided with intermittent portions 24 in which embossed grooves are intermittently provided at each crossing portion of the lattice, and the lattice direction is inclined with respect to the longitudinal direction and the width direction of the incontinence pad 1 (diagonal lattice). Arranged).

  The lattice-shaped emboss 23 is preferably provided in a region along the pad width direction in the front and rear regions of the region corresponding to the body fluid discharge site H, respectively. Further, linear linear embosses 25 along the longitudinal direction of the pad are provided on both sides in the width direction of the region corresponding to the body fluid discharge site H, respectively. The grid-like embosses 23 and 23 and the linear embosses 25 and 25 are preferably provided so as to surround a region corresponding to the body fluid discharge site H.

  In this document, along the width direction of the incontinence pad 1 means that a straight line connecting the end portions of the embossed region is substantially along the width direction of the incontinence pad 1, and in addition to the case where the straight line is parallel to the width direction line, Those having an angle difference of up to about ± 40 ° with respect to the width direction line are also included. Similarly, along the longitudinal direction of the incontinence pad 1, the straight line connecting the end portions of the embossed region is substantially along the longitudinal direction of the incontinence pad 1, and this straight line is parallel to the longitudinal direction line. Also included are those having an angle difference of up to about ± 40 ° with respect to the longitudinal line. Further, the region along the longitudinal direction or the width direction does not need to be linear, and can be formed in a curved shape, a broken line shape, a wave shape, or the like.

  The lattice embossing 23 and the linear embossing 25 are applied from the surface side (skin surface side) of the absorbent body 4 before laminating the liquid-permeable surface sheet 3 or the encapsulating sheet 5 surrounding the absorbent body 4. Is preferred. That is, as shown in FIG. 3, it is given by pressing from the surface side of the absorbent body 4 or the encapsulating sheet 5 during the manufacturing process of the incontinence pad 1. The grid-like emboss 23 and the linear emboss 25 prevent the body fluid absorbed by the absorber 4 from diffusing inside the absorber 4 and prevent it from leaking from the end of the absorber 4.

  By providing the grid-like emboss 23 and the linear emboss 25, the body fluid absorbed by the absorber 4 is reliably dammed by the grid-like emboss 23 and the line emboss 25, and body fluid leaks from the end of the absorber 4. Can be completely prevented. Here, the linear embossing 25 may be omitted, but it is preferable to provide the linear embossing 25 in order to reliably prevent leakage from the end in the width direction of the absorbent body 4.

  As shown in detail in FIG. 4, the lattice-like emboss 23 extends in a second direction perpendicular to the first direction and a plurality of first emboss grooves 23 a, 23 a, extending in the first direction. The intermittent portion 24 is formed in a lattice shape including a plurality of second embossed grooves 23b, 23b..., And the embossed grooves 23a, 23b are intermittently intersected at the intersections of the first embossed grooves 23a and the second embossed grooves 23b. The first direction and the second direction are inclined with respect to the longitudinal direction and the width direction of the incontinence pad 1 at an angle of about 45 °, respectively. By providing the intermittent portion 24, the lattice-shaped emboss 23 is formed in an intermittent line shape in which the first embossed grooves 23a and the intermittent portions 24 are alternately arranged in the first direction, and the second direction. On the other hand, the second embossed groove 23b and the intermittent portion 24 are formed in an intermittent line.

  The length (gap) of the intermittent portion 24 is 2 mm to 5 mm, preferably 2 mm to 3 mm. The length of the intermittent part 24 is the minimum gap S between adjacent embossed grooves. By setting the length of the intermittent portion 24 within this range, the pressure can be appropriately divided during embossing, and the body fluid can be appropriately diffused outward without impairing the body fluid blocking effect.

  As shown in FIG. 4, the length L of one side of the lattice formed by the lattice-shaped emboss 23 (the separation width between adjacent embossed grooves inclined in the same direction) is preferably about 8 mm to 15 mm. Further, the length E of the embossed grooves disposed on each side of the lattice is preferably about 5 mm to 12 mm. If the grid grid is too small, the operability is deteriorated, and if it is too large, the hardness of the embossed grooves is easily felt during mounting.

  The lattice-shaped emboss 23 may be formed with the same size at the front side portion and the rear side portion of the region corresponding to the body fluid discharge site H, or may be formed with different sizes. For example, since the body fluid tends to accumulate along the skin surface in the rear side portion, the length of the intermittent portion 24 can be increased in order to improve the outward diffusibility.

  As shown in FIG. 3, it is preferable that the application region of the grid-like emboss 23 has a curved shape in which the outlines at both ends in the longitudinal direction bulge outward in the pad longitudinal direction. As a result, the body fluid that has diffused radially from the region corresponding to the body fluid discharge site H at the center of the pad can be reliably dammed.

  Further, as shown in FIG. 3, the application region of the grid-like emboss 23 is formed so as to narrow toward the longitudinal end of the absorbent body 4 at least on the rear side of the body fluid discharge site H. preferable. Thereby, the number of pressing parts located on the width direction line shown by A1-A3 decreases as it goes to the back side (end part side), such as 8 places in A1, 6 places in A2, and 4 places in A3. Therefore, the hardness by the end side squeezing is reduced, and the uncomfortable feeling at the time of wearing can be reduced. Similarly, the application region of the grid-like emboss 23 disposed on the front side of the body fluid discharge site H is similarly formed narrower toward the end in the longitudinal direction, so that a feeling of strangeness at the time of wearing can be reduced.

  On the other hand, the linear embossing 25 is provided on the both sides in the width direction of the region corresponding to the bodily fluid discharge site H, respectively, with a single line provided as a continuous line or an intermittent line along the pad longitudinal direction, or a plurality spaced apart in the pad width direction. It is a linear emboss of a strip, and is composed of straight lines, curved lines, wavy lines, and the like. In the example shown in FIG. 3, each of the regions corresponding to the bodily fluid discharge site H is formed by one continuous line along the longitudinal direction of the pad. The linear emboss 25 may be applied from the surface side of the absorbent body 4 or the encapsulating sheet 5 together with the lattice emboss 23 in the manufacturing process, or may be applied in a separate process from the lattice emboss 23. Good. The linear emboss 25 may be formed in a mesh shape such as a lattice shape, an oblique lattice shape, or a honeycomb shape.

  The linear emboss 25 is formed so as to include at least an area corresponding to the body fluid discharge site H and a range overlapping in the pad width direction. Preferably, as shown in FIG. 3, both end portions are provided so as to extend to a position where they are connected to or adjacent to both side portions of the grid-like embosses 23, 23 arranged at the front and rear portions of the region corresponding to the body fluid discharge site H. It has been. Thereby, when the bodily fluid absorbed by the absorber 4 diffuses in the pad width direction, side leakage from the side portion of the absorber 4 can be reliably prevented.

  The lattice emboss 23 may be formed with the same groove width as that of the linear emboss 25 or a larger groove width. However, it is preferable that the lattice emboss 23 be formed with a groove width smaller than that of the linear emboss 25. In other words, the linear emboss 25 is preferably formed with a larger groove width than the lattice emboss 23. Since the grid-like embosses 23 are arranged in a mesh pattern as described above, if they are formed with a thick groove width, the hardness of the absorbent body 4 may increase and the wearing feeling may deteriorate.

  By providing the grid-like embossing 23 formed in this way, the incontinence pad 1 has the following effects. As shown in FIG. 5 (A), in the case of the conventional grid-like embossing in which each grid where the intermittent portion 24 is not formed is surrounded by continuous embossed grooves, the surface material (encapsulated sheet 5 and absorption at the time of embossing compression) Since the pressure applied to the surface of the body 4 could not be dispersed, distortion due to squeezing was accumulated, and the surface material was likely to be wrinkled or twisted. Occurrence of wrinkles and twists causes operability problems such that the embossed groove bites the embossed convex portion of the embossed roll and the product is wound around the embossed roll. On the other hand, in this incontinence pad 1, as shown in FIG. 5B, the pressure applied to the surface material at the time of embossing is dispersed by the intermittent portion 24, so that the strain applied to the surface material can be escaped. The surface material is less likely to be wrinkled or twisted, and the product can be prevented from being wound around the embossing roll. Further, since no intersecting portion is formed in the embossed groove, problems such as paper powder clogging at the corner of the intersecting portion can be solved, and the operability of embossing can be improved.

  Further, when the line conveying direction of the product coincides with the pad longitudinal direction during the manufacturing process, as shown in FIG. 6 (A), the lattice direction becomes a regular lattice shape that substantially coincides with the pad longitudinal direction and the width direction. When arranged, because the embossed groove is formed in a direction that coincides with the pad longitudinal direction and the width direction, the difference between the high part and the low part of the linear pressure during pressing with the embossing roll is large, the surface material is torn by pressing, Wrinkles and twists were likely to occur. In contrast, as shown in FIG. 6B, when the incontinence pad 1 is arranged in a rhombus pattern, the embossed grooves are arranged almost uniformly in the pad width direction. The pressure is almost constant and tearing of the surface material can be prevented.

  In addition, it is possible to dam the body fluid diffusing in the front-rear direction from the central portion with both orthogonal grids, so that the diffusion of the body fluid to the outside side can be effectively suppressed when arranged in a rhombus lattice shape Become.

  About the effect of this grid | lattice-like embossing 23, the comparison with the grid | lattice-like embossing which is conventionally known, a streaky embossing, and dot-like embossing is shown in FIGS. In Examples 1 and 2 employing the above-described grid-like emboss 23, as shown in FIG. 7, the pattern is not clogged or torn, and the operability is excellent, the degree of compression is good, and the diffusion of body fluids is prevented. Well, hard to feel the hardness when wearing. When the length of the intermittent portion 24 is 2 mm, the body fluid diffusion preventing property is particularly excellent.

  Further, in Comparative Example 1 in which rhombus-like embossing is formed by intersecting embossing grooves, there is no escape route in the pressure at the time of embossing compression, so that winding around the embossing roll and clogging of paper dust and the like occur, resulting in poor operability. Become.

  The comparative example 2 has a structure in which the embossed grooves are continuously formed at the intersections of the embossed grooves as in the comparative example 1, and the embossed grooves are separated at the intermediate part. Similarly to Comparative Example 1, Comparative Example 2 also has an embossed groove crossing portion, so that the embossing roll is clogged and the operability is deteriorated. Moreover, a difference arises in a pressing degree and it cannot compress uniformly.

  In Comparative Example 3, as in Examples 1 and 2, intermittent portions are provided at each crossing portion of the lattice, but the lattice direction is arranged in a regular lattice shape in which the longitudinal direction and the width direction of the pad coincide with each other. It is a thing. For this reason, as above-mentioned, a difference arises in a compression degree and operativity deteriorates.

  As shown in FIG. 9, in Comparative Examples 4 and 5, a plurality of streak-like embossments are arranged along the pad longitudinal direction and spaced apart in the pad width direction. In this case, there is no problem in operability and absorption performance, but there is a problem that the embossed groove feels hard at the time of wearing, and the feeling of touch and the wearing property are deteriorated. In addition, although the comparative example 4 and the comparative example 5 differed in the line | wire width of a streak-like embossing, the difference of the performance by this difference was hardly seen.

  Furthermore, although the comparative example 6 arrange | positions dot-like embossing in zigzag form, since it is dot-like embossing, the compression degree was weak and the absorption performance was inferior compared with the other.

[Other examples]
(1) In the above embodiment, the grid-like emboss 23 is applied from the front surface side of the absorbent body 4 before laminating the liquid-permeable surface sheet 3 or the encapsulating sheet 5 surrounding the absorbent body 4, After the liquid-permeable surface sheet 3 is laminated on the skin side surface of the absorbent body 4, it may be applied from the surface side of the liquid-permeable surface sheet 3.
(2) Instead of the linear embosses 25, 25, the grid-like embosses 23 may be provided in regions along the pad longitudinal direction on both sides in the pad width direction of the region corresponding to the body fluid discharge site H.
(3) In the incontinence pad 1, a bodily fluid inflow groove may be formed in the region corresponding to the body fluid discharge site H along the longitudinal direction on the surface side. The concave groove receives the bodily fluid discharged on the surface of the liquid-permeable top sheet 3, temporarily stores the bodily fluid, induces diffusion of the bodily fluid in the front-rear direction, and absorbs the bodily fluid into the absorbent body 4 To prevent side leakage.

  The concave groove is formed in advance in the absorbent body 4 along the longitudinal direction on the skin contact surface side including the body fluid discharge site H without forming a concave groove shape or a slit-shaped absorbent body concave portion. In the state where the absorbent body 4 is surrounded by the encapsulating sheet 5 and the liquid-permeable surface sheet 3 is laminated, if necessary, by embossing from the surface side (skin contact surface side) of the liquid-permeable surface sheet 3, It can provide by forming an embossed part inside the said absorber recessed part along the said absorber recessed part. In addition to this, the concave groove extends from the liquid-permeable surface sheet 3 to the absorber 4 by pressing from the surface side of the liquid-permeable surface sheet 3 in a state where the liquid-permeable surface sheet 3 is laminated on the absorber 4. These components may be provided by pressing together.

  The concave groove may be formed in a central portion in the pad width direction corresponding to the body fluid discharge site H and in the middle portion in the longitudinal direction, or may be formed in a plurality spaced apart in the pad width direction. Alternatively, it may be formed in a discontinuous line shape spaced apart in the longitudinal direction of the pad.

  DESCRIPTION OF SYMBOLS 1 ... Incontinence pad, 2 ... Impervious back sheet, 3 ... Impervious surface sheet, 4 ... Absorber, 5 ... Encapsulated sheet, 6 ... Second sheet, 7 ... Side nonwoven fabric, 8 ... Super absorbent polymer, DESCRIPTION OF SYMBOLS 10 ... Inner three-dimensional gather, 11 ... Outer three-dimensional gather, 12.13 ... Thread-like elastic elastic member, 23 ... Lattice-like embossing, 24 ... Intermittent part, 25 ... Linear embossing

Claims (3)

In the absorbent article in which an absorbent body is interposed between the liquid-permeable top sheet and the back sheet,
In the plan view, a lattice-like embossment and a linear line-like emboss are formed on the absorber only from the surface side, or the envelope and the envelope sheet surrounding the absorber are encapsulated. It is formed from the surface side of the sheet, or is formed from the surface side of the liquid-permeable surface sheet to the absorber, the encapsulating sheet and the liquid-permeable surface sheet,
The grid-like embossing is provided with intermittent portions where the embossing grooves are intermittently provided at each crossing portion of the grid, and the grid direction is arranged in a rhombus shape inclined with respect to the longitudinal direction and the width direction of the absorbent article, and Each of the front and rear regions of the region corresponding to the body fluid discharge portion is provided in a region along the width direction of the absorbent article, and is not provided in the region corresponding to the body fluid discharge portion,
The linear embossing is provided along the longitudinal direction of the absorbent article on both sides of the region corresponding to the body fluid discharge part, and both ends are connected to both sides of the grid-like embossing. Absorbent article.   The absorbent article according to claim 1, wherein the intermittent portion has a length of 2 to 5 mm. Concave from the surface side of the liquid-permeable surface sheet to at least the encapsulating sheet surrounding the liquid-permeable surface sheet and the absorber along the longitudinal direction on the skin contact surface side of the region corresponding to the body fluid discharge portion. Grooves are formed,
The absorbent article according to claim 1 , wherein the lattice-shaped emboss is provided in a region before and after the groove.

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