JP6189193B2 - Absorbent article and manufacturing method thereof - Google Patents

Description

  The present invention mainly relates to absorbent articles used for incontinence pads, sanitary napkins, vaginal sheets, medical pads, toiletries, disposable diapers, etc., and grooves along the longitudinal direction on the surface side of the absorbent body The present invention relates to an absorbent article in which is formed and a method for producing the same.

  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 kind of absorbent article, and it is one of the means for temporary storage and urine diffusion for receiving urine that is drunk at a time, such as a light incontinence pad, in a small area and quickly diffusing it. Various types have been proposed in which concave grooves are formed along the longitudinal direction on the surface side. Moreover, the absorber is generally surrounded by the encapsulating sheet in order to maintain the shape and improve the diffusibility of body fluid.

  For example, in Patent Document 1 below, an absorbent material supplied in an air stream is sucked and deposited in a recess provided on the outer peripheral surface of a rotating drum, and deposits released from the recess are added. It is a manufacturing method of an absorbent body comprising a pressing step of pressing and compressing, and in the pressing step, a deposit released from the recess is surrounded by a core wrap sheet and then pressurized.

  Moreover, in the following patent document 2, the absorber has an upper layer absorber on the skin contact surface side and a lower layer absorber on the non-skin contact surface side, and the middle and high portions formed by the upper layer absorber and the lower layer absorber Has a recess extending in the longitudinal direction formed on the skin contact surface side, and the recess is an opening penetrating the upper layer absorber, and the lower surface of the upper layer absorber forms the bottom surface of the opening. Discloses an absorbent article in which the lower layer absorber is located.

JP 2012-16584 A JP 2009-112590 A

  In the case of a conventional encapsulating sheet, as shown in FIG. 12, it is covered in a frame-like shape that wraps around from the back side of the absorber to the front side at both sides, and an overlapping part is provided in which both side edges are overlapped at the center on the front side. In general, after the overlapping portion is bonded with a hot melt adhesive or the like, as shown in FIG. 13, a groove is simultaneously formed in the encapsulating sheet and the absorbent body by embossing from the surface side. .

  However, as shown in FIG. 13, when embossing is applied from the surface side in a state where the absorber is surrounded by the encapsulating sheet, the encapsulating sheet is torn due to the deformation of the embossing, or the encapsulating sheet is pulled by the deformation of the embossing. As a result, the absorber around the embossing is compressed, the volume of the embossed portion is reduced, and the absorption performance is deteriorated.

  On the other hand, in the conventional absorbent article, a concave groove was formed by compressing the absorbent body and consolidating the fibers. Therefore, when the body fluid is absorbed into the concave groove, the compacted fiber or the superabsorbent polymer Swells and closes the concave groove, so that there is a problem that the absorption performance of the body fluid is lowered.

  Therefore, the main problem of the present invention is that when embossing for forming a concave groove is provided, the encapsulating sheet can be prevented from being torn and the volume of the embossed portion can be prevented from being reduced, and the deterioration of the absorption performance can be prevented. It is providing the absorbent article and its manufacturing method.

In order to solve the above-mentioned problem, as the present invention according to claim 1, an absorbent recess having a groove shape or a slit shape is formed along the longitudinal direction on the skin contact surface side including the body fluid discharge site without being compressed. An absorbent article comprising an absorbent body and an encapsulating sheet surrounding the absorbent body,
The enveloping sheet wraps around the skin contact surface side on both sides from the non-skin contact surface side of the absorber, and the skin contact surface side is provided with an overlapping portion where both side edges overlap each other. An embossed portion is formed along the absorber concave portion inside the absorber concave portion by embossing from the contact surface side, and at least in the longitudinal range corresponding to the embossed portion of the overlapping portion, the overlapping portion is encapsulated. There is provided an absorbent article characterized in that a non-joining region in which sheets are not joined is provided.

  In the invention of the first aspect, along with the longitudinal direction on the skin contact surface side including the body fluid discharge site, an absorbent body in which a concave groove shape or a slit-shaped absorber concave portion is formed without being compressed, and In the state where the encapsulating sheet wraps around the skin contact surface side on both sides from the non-skin contact surface side of the absorber, and the overlapping portion where both side edges overlap is provided on the skin contact surface side. Surrounds the body. An embossed portion is formed along the absorber recess in the absorber recess by embossing from the skin contact surface side with respect to the thus combined absorber and encapsulating sheet. At this time, the encapsulating sheets in the overlapping portion are provided with non-joining regions that are not joined to each other at least in the longitudinal range corresponding to the embossed portion. In this way, since the laminated encapsulated sheets are not joined in the non-joined region, slip occurs between the encapsulated sheets during squeezing when the embossed portion is provided, and the deformation of the encapsulated sheet due to the squeezing is absorbed. Therefore, it is suppressed that the encapsulating sheet is pulled by embossing. Therefore, the encapsulating sheet can be prevented from being torn, and the absorber around the embossed portion is compressed by the pulled encapsulating sheet, so that the volume of the embossed portion can be reduced and deterioration of the absorption performance can be prevented.

  Moreover, since the said absorber is provided with the absorber recessed part beforehand without being squeezed, the embossed part is provided in the inside of this absorber recessed part by embossing from the skin contact surface side along this absorber recessed part. Even when the body fluid penetrates into the absorbent recess and the pulp or polymer around the absorbent recess expands, the swelling at the time of expansion is suppressed to a very small level compared to the case where the concave groove is formed by pressing. It becomes possible to prevent the body fluid absorption performance from being reduced due to the blockage.

  As the present invention according to claim 2, there is provided the absorbent article according to claim 1, in which the encapsulating sheets in the overlapping portion are not joined to each other in the entire region in the longitudinal direction.

  In the invention according to the second aspect, since the overlapping encapsulated sheets are not joined to each other in the entire longitudinal direction, the tension of the encapsulating sheet can be more reliably suppressed when the embossed portion is formed. Become.

  As the present invention according to claim 3, there is provided the absorbent article according to claim 1, wherein the encapsulating sheets of the overlapping portion are joined to each other at both longitudinal ends excluding the longitudinal range corresponding to the embossed portion. .

  In the invention according to claim 3, in the longitudinal range corresponding to the embossed portion, a non-joined region in which the encapsulated sheets in the overlapping portion are not joined to each other in order to suppress the tension of the encapsulated sheet when the embossed portion is formed. On the other hand, at both ends in the longitudinal direction, the encapsulated sheets should be joined to each other in order to prevent the encapsulated sheets from flapping during line transportation in the manufacturing process and to prevent polymer spillage. ing.

  As this invention which concerns on Claim 4, the said overlapping part is provided in the position which overlaps with the said absorber recessed part, The absorbent article in any one of Claims 1-3 is provided.

  In the invention according to claim 4, the covering sheets extending from the respective side edges are arranged on both sides of the absorber recess by providing the overlapping portion of the encapsulating sheets at a position overlapping the absorber recess. Thus, when the embossed portion is provided along the absorber concave portion, it becomes possible to prevent the left and right encapsulating sheets from being pulled by the embossed portion with the embossed portion as a boundary.

  In the present invention according to claim 5, the width S of the overlapping portion is such that S ≧ (A + B / 2) or S <(A + B / 2), where A is the depth of the absorber recess and B is the width of the bottom surface. The absorbent article according to any one of claims 1 to 4 is provided.

  In the invention of claim 5, when the width S of the overlapping portion is S ≧ (A + B / 2), when the embossed portion is provided in the absorber recess, the encapsulating sheet covers the entire inner surface of the absorber recess, Polymer spillage can be prevented. On the other hand, when the width S of the overlapping portion is S <(A + B / 2), a portion where the encapsulating sheet is not interposed and the absorber concave portion is exposed is provided on a part of the inner surface of the embossed portion. The bodily fluid is infiltrated and rapid bodily fluid absorption becomes possible.

As this invention which concerns on Claim 6, It is a manufacturing method of the absorbent article in any one of the said Claims 1-5,
After the absorbent body in which the absorbent body recess is formed is surrounded by the encapsulating sheet and the overlap portion is provided, water spray is sprayed on a region other than the longitudinal range corresponding to the embossed portion of the overlap portion. Thus, there is provided a method for manufacturing an absorbent article, wherein the embossed portion is formed in a state where the encapsulating sheets are temporarily joined together.

  In the invention of claim 6, the embossed portion is formed in a state where the encapsulated sheets are temporarily joined by spraying water spray to a region other than the longitudinal range corresponding to the embossed portion of the overlapping portion. ing. The portion where the water spray is sprayed easily adheres to each other due to the viscosity and surface tension of the water, so that even if the sheet is fluttered during line transportation in the manufacturing process, the enveloping sheet can be prevented from being turned up.

  As described above in detail, according to the present invention, when embossing for forming a concave groove is provided, tearing of the encapsulating sheet can be prevented, and the volume of the embossed portion can be prevented from being reduced, resulting in deterioration in absorption performance. You will never be invited.

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 the III-III arrow directional view of FIG. It is a top view of the state which took out the absorber 4 enclosed with the to-be-wrapped sheet | seat 5. FIG. FIG. 5 is a view taken along line VV in FIG. 4. It is the VI-VI line arrow directional view of FIG. It is a top view which shows the state which surrounded the absorber 4 with the covering sheet 5. FIG. It is a VIII-VIII arrow directional view of FIG. FIG. 4 is a cross-sectional view of the absorber 4. It is the VIII-VIII line arrow directional view of FIG. 7 which shows a modification. (A) is sectional drawing of the absorber 4 before providing the embossed part 21, (B), (C) is sectional drawing of the absorber 4 after providing the embossed part 21. FIG. It is sectional drawing of the absorber which shows the ditch | groove formation by the conventional method. It is sectional drawing of the absorber which shows after the ditch | groove formation by the conventional method.

  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 to 3, the incontinence pad 1 according to the present invention includes a liquid-impermeable back sheet 2 made of a polyethylene sheet and the like, a liquid-permeable surface sheet 3 that quickly transmits urine, and the like. 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 suction In the periphery of the body 4, the outer edge portion of the liquid-impervious back sheet 2 and the liquid-permeable surface sheet 3 is joined at the edge portion 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 the both side edges are joined by an adhesive such as hot melt or an adhesive means such as heat seal. ing.

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. The water-absorbing polymer having the water-absorbing performance can be adjusted in water absorption (absorption capacity) and water absorption speed by adjusting the crosslinking density and the crosslinking density gradient in the production process. Basis weight of the ^{polymer, 150g / m 2 ~500g / m} 2, and it is preferably a ^{200g / m 2 ~450g / m 2} .

  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, alkylchromic chloride-based water repellent, etc. 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. 3, the side nonwoven fabric 7 is not provided with the elastic elastic members 12 and 13 at both ends in the longitudinal direction of the pad, 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.

[About recessed grooves]
The concave groove 22 formed in the incontinence pad 1 will be described with reference to FIGS. 4 to 6 in which the absorber 4 surrounded by the encapsulating sheet 5 is taken out.

  In the incontinence pad 1, a bodily fluid inflow groove 22 is formed along the longitudinal direction of the pad on the skin contact surface side (liquid-permeable surface sheet 3 side). The concave groove 22 receives the body fluid discharged on the surface of the liquid-permeable top sheet 3, temporarily stores the body fluid, promotes the diffusion of the body fluid in the front-rear direction, and absorbs the body fluid into the absorber 4. This is to increase the speed and prevent side leakage.

  The concave groove 22 is formed in advance in the absorbent body 4 along the longitudinal direction of the skin contact surface side including the body fluid discharge site, without forming the concave groove-shaped or slit-shaped absorbent concave portion 20 without squeezing. Provided by forming an embossed portion 21 along the absorbent body recess 20 inside the absorbent body recess 20 by embossing from the skin contact surface side in a state surrounded by the encapsulating sheet 5. It is a thing.

  As shown in FIG. 7 and FIG. 8, the absorber recess 20 is formed in the absorber 4 in advance before the embossed portion 21 is formed without being compressed. The absorbent body recess 20 is recessed from the periphery to the non-skin contact surface side (impermeable liquid back sheet 2 side) on the skin contact surface side (liquid permeable top sheet 3 side) of the absorber 4. Further, it is a non-penetrating concave groove portion having a bottom surface. The absorber recess 20 may be formed in a slit shape penetrating from the skin contact surface side of the absorber 4 to the non-skin contact surface side, instead of being formed as a non-penetrating recess. For example, as shown in FIG. 9, the absorbent body recess 20 is not compressed, and (A) stacked fiber, or (B) the lower layer absorbent body 4 a formed with the thickness of the bottom of the absorbent body recess 20, A portion corresponding to the absorber recess 20 is formed by a laminated structure with the upper absorber 4b opened.

  As shown in FIG. 1, it is preferable that the absorbent body recess 20 is formed in the center part in the pad width direction with respect to the absorbent body 4 and only one strip is formed in the middle part in the longitudinal direction. A plurality of strips may be formed apart in the direction (not shown). In addition, when providing a plurality of absorber recessed parts 20, it is preferable to provide the said embossed part 21 with respect to each absorber recessed part 20. FIG.

  The planar dimensions of the absorbent body recess 20 are preferably such that the length in the pad longitudinal direction is 100 to 180 mm and the groove width B (groove width on the bottom surface) is 5 to 30 mm. When the absorber recess is formed in a groove shape, the depth A of the absorber recess 20 is preferably 50% or more of the thickness of the absorber 4.

The absorbent 4 portion interposed in the bottom of the absorbent recess 20 (the liquid-impermeable back sheet 2 side portion, the non-skin side portion) has a pulp basis weight of 70 g / m ^{2 to} 210 g / m ² , preferably 90g ^{/ m 2} ~190g ^/ m 2 to the well, the basis weight of the polymer is ^{60g / m 2 ~200g / m 2} , and it is preferably a ^{80g / m 2 ~180g / m 2} .

  As shown in FIGS. 7 and 8, the absorbent body 4 is surrounded by a single encapsulating sheet 5. The encapsulating sheet 5 has a rectangular shape or a planar shape in which a longitudinal end portion is cut in accordance with the shape of the absorber 4 in a plan view in an unfolded state, and the absorber 4 is disposed at an intermediate portion in the width direction of the encapsulating sheet 5. Is placed on both sides of the absorbent body 4 from the non-skin contact surface side (impermeable liquid back sheet 2 side) to the skin contact surface side (liquid permeable surface sheet). 3), the absorber 4 is surrounded in a forehead shape provided with an overlapping portion 23 where both side edges overlap each other.

  The pad longitudinal dimension of the encapsulating sheet 5 may be adapted to the longitudinal dimension of the absorbent body 4 as long as it covers the entire absorbent body 4, or may be longer than the dimension of the absorbent body 4. In the case of this example in which the longitudinal edge of the absorbent body 4 is formed in an arc shape, the encapsulating sheet 5 is formed in a rectangular shape with a length covering the entire absorbent body 4 as shown in the figure, A part or all of the end portion in the longitudinal direction may be provided so as to protrude outside the longitudinal end edge of the absorbent body 4.

  The overlapping portion 23 overlaps the edges of the encapsulating sheet 5 that wrap around each side edge of the absorbent body 4 and extend to the skin contact surface side on the skin contact surface side of the absorbent body 4. The double laminated portion of the encapsulating sheet 5 formed. The overlapping portion 23 is provided with a uniform width over the entire length of the longitudinal dimension of the encapsulating sheet 5.

  The overlapping portion 23 may be provided at any position in the pad width direction as long as it is provided on the skin contact surface side of the absorbent body 4, but as shown in FIG. It is preferable to provide it at the center position in the direction. Thereby, the enveloping sheet 5 extended from each absorber side edge will be arrange | positioned at the both sides of the absorber recessed part 20, and when providing the said embossed part 21, the encapsulating sheet 5, 5 in the said overlap part 23 will be provided. It becomes easy to produce mutual slip, and the tension | tensile_strength by the embossing of the right and left enveloping sheet 5 can be prevented now on the embossed part 21 as a boundary. As shown in FIG. 10, the overlapping portion 23 may be provided at a position where it does not overlap the absorber recess 20, that is, at a position displaced in the width direction with respect to the absorber recess 20.

  As shown in FIG. 11, the width S of the overlapping portion 23 is in the range of S ≧ (A + B / 2), where A is the depth of the absorber recess 20 and B is the width of the bottom surface of the absorber recess 20. Or in the range of S <(A + B / 2). When it is in the range of S ≧ (A + B / 2), as shown in FIG. 11B, when the embossed portion 21 is provided, the entire inner surface of the absorber recess 20 is covered with the encapsulating sheet 5. Spilling of polymer can be prevented. On the other hand, if the width S of the overlapping portion 23 is too large, slipping between the encapsulating sheets 5 and 5 is less likely to occur at the overlapping portion 23 when the embossed portion 21 is formed, and the enveloping sheet 5 is likely to be pulled. When it does, it is preferable to provide in the range in which the edge part of the covering sheet 5 is located in the bottom face of the absorber recessed part 20. FIG. Moreover, when provided in the range of S <(A + B / 2), as shown in FIG. 11C, a portion exposed without being covered with the encapsulating sheet 5 is formed on the inner surface of the absorber recess 20. For this reason, body fluid is quickly absorbed from the exposed portion of the absorber.

  As shown in FIG. 8, the absorber 4 surrounded by the encapsulating sheet 5 is embossed along the absorber recess 20 inside the absorber recess 20 by embossing from the skin contact surface side. A portion 21 is formed.

  The embossed portion 21 may be provided by squeezing at least from the skin contact surface side of the encapsulating sheet 5, or the liquid-permeable surface sheet 3 and, if necessary, the skin contact surface side of the encapsulating sheet 5. In a state where the second sheet 6 is laminated, the liquid-permeable surface sheet 3, the second sheet 6, and the encapsulating sheet 5 are integrally provided by pressing from the skin contact surface side of the liquid-permeable surface sheet 3. May be. Moreover, after providing the embossing by pressing from the skin contact surface side of the encapsulating sheet 5 in a state where the absorbent body 4 is surrounded by the encapsulating sheet 5, the liquid-permeable surface sheet 3 and necessary are provided on the skin contact surface side. Then, in a state where the second sheet 6 is laminated, a two-stage embossing is applied to the liquid-permeable surface sheet 3 and the second sheet 6 by embossing from the skin contact surface side of the liquid-permeable surface sheet 3. Also good. In any case, at least the compression of the absorbent body 4 due to the tension of the encapsulating sheet 5 can be prevented.

  The planar dimension of the embossed part 21 may be larger or smaller than the dimension of the absorber recess 20. On the bottom surface of the embossed portion 21, a high-pressure squeezed portion squeezed deeper than the bottom surface of the peripheral concave groove 22 may be formed in an appropriate pattern.

  The encapsulating sheet 5 is provided with a non-joining region 24 that does not join the encapsulating sheets 5 and 5 of the overlapping portion 23 in at least a longitudinal range corresponding to the embossed portion 21 of the overlapping portion 23. The non-bonding region 24 is a case where the encapsulating sheets 5 and 5 are simply laminated, such as bonding the encapsulating sheets 5 and 5 of the overlapping portion 23 by a bonding means such as hot melt adhesive or heat sealing. It is an area where no means is provided to prevent slipping between the encapsulating sheets 5 and 5. Further, the longitudinal range corresponding to the embossed portion 21 is a range that overlaps the provision planned region 21 ′ of the embossed portion 21 in the pad width direction.

  The non-bonding region 24 can be provided over the entire length of the overlapping portion 23. Thereby, when providing the said embossed part 21, while being able to suppress the tension | tensile_strength of the encapsulation sheet 5 more reliably, a manufacturing process can be simplified.

  Further, the non-bonding region 24 is provided only in the middle portion of the pad longitudinal direction including the embossed portion 21, and at both end portions in the longitudinal direction, the encapsulating sheets 5 and 5 of the overlapping portion 23 are connected to each other with a hot melt adhesive or Bonding regions 25 and 25 bonded by a known bonding means such as heat sealing can be provided. By providing the joining regions 25, 25, it is possible to prevent the material from fluttering during the line conveyance in the manufacturing process and causing the encapsulating sheet 5 to be turned up or spilled. When a hot melt adhesive is used as the joining means, it is preferably applied by a method such as spiral or bead that does not inhibit the penetration of body fluid. The joining region 25 may be provided continuously outside the non-joining region 24 or may be provided intermittently with a non-joining region interposed therebetween. The joining region 25 may be configured by temporarily joining by spraying water spray or the like instead of joining by the joining means such as the hot melt adhesive or heat seal described above.

  In the example shown in FIG. 7, the embossed portion 21 (21 ′) is formed in a range shorter in the pad longitudinal direction than the both ends in the groove direction of the absorber recess 20, and the longitudinal end of the non-bonded region 24 is embossed. The bonding regions 25, 25 are provided at both ends of the pad longitudinal direction outside the non-bonding region 24, respectively, so as to be located in the middle of the longitudinal range of the portion 21 and the longitudinal edge of the absorber recess 20. Is provided. In other words, the end portion of the non-bonded region 24 is located between the end portion of the absorber recess 20 and the end portion of the embossed portion 21. As a result, the surface side of the absorbent body 4 where the absorbent body recess 20 is not provided is covered with the encapsulating sheet 5, and polymer spillage or the like can be reliably prevented, and the encapsulating sheet 5 is reliably pulled when the embossed portion 21 is formed. Can be prevented.

  According to the incontinence pad 1 having the above configuration, the non-bonding region 24 is provided in the overlapping portion 23 of the covering sheet 5 so that the encapsulating sheets 5 and 5 stacked in the non-bonding region 24 are not bonded. Therefore, slipping occurs between the encapsulating sheets 5 and 5 during compression when the embossed portion 21 is provided, and deformation of the encapsulating sheet 5 due to the pressing is absorbed, so that the enveloping sheet 5 is suppressed from being pulled by the embossing. The Therefore, it is possible to prevent the encapsulating sheet 5 from being torn and to reduce the decrease in the volume of the embossed portion 21 due to the compression of the absorbent body 4 around the embossed portion 21 by the encapsulating sheet 5, and the accompanying deterioration in the absorption performance. Can be prevented.

  Further, the absorbent body 4 is provided with an absorbent body recess 20 in advance without being squeezed, and the embossed portion 21 is embossed from the skin contact surface side along the absorbent body recess 20 inside the absorbent body recess 20. Therefore, even when the body fluid penetrates into the absorbent recess 20 and the pulp or polymer around the absorbent recess 20 expands, the swelling at the time of expansion is suppressed to be extremely small compared to the case where the recess is formed by pressing. Therefore, it is possible to prevent the absorbent recess 20 from being blocked and the body fluid absorption performance from being lowered.

  Next, the manufacturing procedure until the embossed portion 21 of the incontinence pad 1 is formed will be described. After the absorbent body 4 having the embossed concave portion 20 is manufactured in advance by stacking or a laminated structure, the absorbent body 4 is It is placed on the encapsulating sheet 5, surrounds the absorbent body 4 in a predetermined folding manner, and, if necessary, joins the joining region 25 with a predetermined joining means, thereby bringing the skin of the absorbent body 4 into contact with the skin. The embossed portion 21 is formed by embossing from the skin contact surface side with the overlapping portion 23 provided on the surface side.

  When providing the embossed portion 21, as described above, embossing may be applied integrally from the skin contact surface side of the liquid-permeable surface sheet 3, or from the skin contact surface side of the encapsulating sheet 5. Then, it is good also as a two-step embossing provided from the skin contact surface side of the liquid-permeable surface sheet 3 further.

  When the joining region 25 is provided in the overlapping portion 23, water spray is sprayed on a region other than the longitudinal range corresponding to the embossed portion 21 (the joining region 25 shown in FIG. 7) to encapsulate the overlapping portion 23. The sheets 5 and 5 can be temporarily joined together. The portion where the water spray is sprayed is temporarily easily stuck between the encapsulating sheets 5 and 5 due to the viscosity and surface tension of the water, so that the encapsulating sheet 5 is prevented from being turned up due to flapping during line transportation in the manufacturing process. it can. Further, by applying the water spray, it is not necessary to provide the joining region 25, and the manufacturing process can be simplified. The moisture generated by the water spray naturally evaporates during the subsequent manufacturing process and product transportation, and therefore does not affect the product characteristics.

  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, 20 ... Absorber recessed part, 21 ... Embossed part, 22 ... Concave groove, 23 ... Overlapping part, 24 ... Non-joining area | region, 25 ... Bonding area

Claims (6)

Along the longitudinal direction on the skin contact surface side including the body fluid discharge site, an absorbent body in which a concave groove shape or a slit-shaped absorbent body concave portion is formed without squeezing, and an encapsulating sheet surrounding the absorbent body An absorbent article provided,
The enveloping sheet wraps around the skin contact surface side on both sides from the non-skin contact surface side of the absorber, and the skin contact surface side is provided with an overlapping portion where both side edges overlap each other. An embossed portion is formed along the absorber concave portion inside the absorber concave portion by embossing from the contact surface side, and at least in the longitudinal range corresponding to the embossed portion of the overlapping portion, the overlapping portion is encapsulated. An absorptive article provided with a non-joining field where sheets are not joined.   The absorptive article according to claim 1 in which said enveloping sheet of said overlap part is not joined in the whole area of a longitudinal direction.   The absorbent article according to claim 1, wherein the encapsulating sheets of the overlapping portion are joined to each other at both ends in the longitudinal direction excluding the longitudinal range corresponding to the embossed portion.   The said overlapping part is an absorbent article in any one of Claims 1-3 provided in the position which overlaps with the said absorber recessed part.   The width S of the overlapping portion is provided in the range of S ≧ (A + B / 2) or S <(A + B / 2), where A is the depth of the absorber recess and B is the width of the bottom surface. Item 5. The absorbent article according to any one of Items 1 to 4. It is a manufacturing method of an absorptive article in any one of the above-mentioned claims 1-5,
After the absorbent body in which the absorbent body recess is formed is surrounded by the encapsulating sheet and the overlap portion is provided, water spray is sprayed on a region other than the longitudinal range corresponding to the embossed portion of the overlap portion. The embossed portion is formed in a state where the encapsulating sheets are temporarily joined to each other.

Images