JP6351354B2 - Absorbent articles - Google Patents

Description

  The present invention mainly relates to absorbent articles used for sanitary napkins, vaginal sheets, incontinence pads, toiletries, and the like, and more specifically, a three-dimensional gather standing on the skin side is formed on both sides of the surface side. The present invention relates to an absorbent article that is folded in the longitudinal direction at a plurality of widthwise fold lines in an individually packaged state.

  Conventionally, as an absorbent article such as a panty liner, sanitary napkin, incontinence pad, a liquid-impervious back sheet such as a polyethylene sheet or a polyethylene sheet-laminated nonwoven fabric, and a liquid-permeable top sheet such as a nonwoven fabric or a liquid-permeable plastic sheet There is known an intervening absorber made of cotton-like pulp or the like.

Many improvements have been made to this type of absorbent article, and various ideas have been made. For example, in the absorbent article shown in FIG. 8 (night sanitary napkin 50), a liquid-impermeable back sheet 51 made of a polyethylene sheet or the like, a liquid-permeable surface sheet 52 that allows menstrual blood or the like to pass through quickly, An absorbent body 53 made of cotton-like pulp or synthetic pulp interposed between the two sheets 51 and 52, a pair of left and right three-dimensional gathers BS provided on both sides of the surface side, a gathered nonwoven fabric 54 forming the BS, 54, and in the periphery of the absorber 53, the outer edge portion of the liquid-impervious back sheet 51 and the liquid-permeable surface sheet 52 at the front and rear end edges thereof is an adhesive such as hot melt, The liquid-impervious back sheet 51 joined by an adhesive means such as heat seal and extending laterally from the absorbent body 53 at both side portions (side flap portions), and the three-dimensional -Gathered non-woven fabric 54 forming BS is bonded by an adhesive such as hot melt, or an adhesive means such as heat seal, and body fluid is discharged by the laminated sheet portion of these liquid-impermeable back sheet 51 and gathered non-woven fabric 54. Wing-like flaps W and W projecting laterally with a portion corresponding to the central portion of the portion H as the central portion in the longitudinal direction are formed, and second wing-like flaps W _B and W are formed on the rear side portion further than this. _B is formed. The three-dimensional gather BS is for blocking body fluid and preventing side leakage, and the wing-shaped flaps W and W are for fixing the sanitary napkin 50 tightly to shorts. The second wing-shaped flaps W _B and W _B are for preventing lateral displacement of the sanitary napkin 50 and body fluid leakage on the buttock side.

The wing-shaped flaps W, W and second wing-shaped flaps W _B, respectively adhesive layer 55 ... on the back side of the W _B, 56 ... are provided. In order to attach the sanitary napkin 50 to the underwear, the sanitary napkin 50 is locally applied, the wing-shaped flaps W, W projecting sideways are taken out of the underwear, and the wrapping line of the wing-shaped flap W proximal end It is turned back at RL and RL, and is attached to the outer surface of the crotch portion of the underwear while winding the crotch portion of the underwear.

  The sanitary napkin 50 is folded to the liquid-permeable surface sheet side into a plurality of folds of about 3 to 5 folds in the longitudinal direction at a plurality of width direction fold lines set at appropriate positions in the individual packaging state. . In the example shown in FIG. 8, four folds are folded in the longitudinal direction along three widthwise fold lines X1 to X3. The absorbent article folded in plural in the individual packaging state is taken out from the individual packaging, and as shown in FIG. 9, the widthwise fold lines X1 to X3 are non-skin side (liquid-impermeable back sheet side) ) Has a protruding crease.

  As an absorbent article which is folded into a plurality in an individual packaging state, for example, in Patent Document 1 below, leak-proof walls are arranged on both sides in the longitudinal direction, and the absorbent article is folded along a fold line crossing the width direction. The absorbent product is a single package of the absorbent article, and the fold line is folded so that a part of the base wall portion of the leak-proof wall extends inward or outward in the width direction of the absorbent article. In addition, there is disclosed an individual package of an absorbent article that traverses a formation region of a multilayer portion formed by joining between folded opposing surfaces or the vicinity thereof.

  Moreover, in the following patent document 2, the individual folding line is one front area individual folding line and one rear area near the rear end of the excretion part area across the excretion part area. It has a rear region first individual folding line, and further has one rear region second folding line in the rear rear region, and fixing the front sheet of the front end portion of the elastic member in the side seat. Is located in front of the front region individual folding line, and the fixing portion of the side seat with the surface sheet at the rear end of the elastic member is located behind the rear region second folding line. An absorbent article is disclosed.

JP 2009-56270 A JP 2013-85829 A

  In the absorbent articles described in Patent Documents 1 and 2, the four-fold individual folded in the longitudinal direction by three widthwise fold lines composed of the fold line at the center in the longitudinal direction and the fold lines at the front and rear thereof. It is disguised. However, the position of the fold line in the width direction is a range in which the leg pressure inward from both sides does not act at the time of wearing as the width fold line X2 in the longitudinal center (65 mm from the center of the body fluid discharge part H to the rear side). When the width direction fold line X2 is located in the standing range of the three-dimensional gather BS, and the product thickness of the portion where the width direction fold line X2 is provided is 2 mm or more. Can cause the following problems. (1) Since the product thickness at the folding position is relatively thick at 2 mm or more, creases protruding on the non-skin side along the fold line are likely to be attached. (2) Since the width direction fold line X2 is provided in the standing range of the three-dimensional gather BS, when the absorbent article is taken out from the individual packaging state due to the contraction force of the elastic member installed in the three-dimensional gather BS The folds protruding outward (non-skin side) are further promoted, and a gap is likely to be generated between the surface of the absorbent article and the skin surface when worn. (3) Moreover, since the widthwise fold line X2 is provided at a position where pressure (leg pressure) directed inward from both sides in the width direction does not act on the inside of the base portion of the leg when worn, There was no deformation that caused the surface to lift up to the skin side, and a gap was formed between the surface of the absorbent article and the skin surface, and body fluid was likely to flow through the skin surface and cause rear leakage or side leakage.

  In addition, the width direction fold lines X1 and X3 arranged before and after the width direction fold line X2 are also provided in the standing range of the three-dimensional gather in the absorbent articles described in Patent Documents 1 and 2 above. The same problem as the folding line at the longitudinal center occurs.

  Therefore, the main problem of the present invention is that the three-dimensional gathers are formed on both side portions on the surface side, and the absorbent article that is folded in the longitudinal direction at a plurality of widthwise fold lines in the individual packaging state is also worn on the skin. An object of the present invention is to provide an absorbent article that makes it difficult to form a gap with a surface and prevents leakage of bodily fluids.

In order to solve the above-mentioned problem, as the present invention according to claim 1, an absorbent body is interposed between the liquid-permeable top sheet and the back sheet, and the middle in the longitudinal direction stands on the skin side on both side portions on the surface side. to form a three-dimensional gathers that, the standing gather gather nonwoven front and back are joined to the absorbent body side at the front adhesive region and the rear adhesive regions, respectively than are disposed Rutotomoni, matches the center of the fluid discharge portion In the absorbent article formed with a wing-like flap protruding sideways with the portion to be longitudinally centered, and folded in the longitudinal direction at a plurality of widthwise fold lines in an individually packaged state,
Of the plurality of widthwise fold lines, one width direction fold line is the formation range of the three-dimensional gather, and within 60 mm from the center in the longitudinal direction of the formation range of the wing-shaped flap to the rear side of the absorbent article And the other fold line in the width direction is the rear adhesive region forming range or the rear adhesive region forming range and the front adhesive region forming. An absorbent article is provided that is provided in both of the ranges.

  In the first aspect of the invention, in the absorbent article folded in the longitudinal direction at a plurality of widthwise fold lines in the individual packaging state, the state of protruding to the non-skin side by the crease is promoted by the contraction force of the three-dimensional gather In order to prevent this, a folding line is not provided as much as possible in the formation range of the three-dimensional gather. However, on the structure of the absorbent article, it is allowed that one width-direction fold line is positioned in the formation range of the three-dimensional gather, but the position of the width-direction fold line provided in the gather formation range is acceptable. Is set to a range in which leg pressure inward from the both sides in the width direction acts on the inner side of the base part of the leg at the time of wearing, so that the surface of the absorbent article is deformed so as to rise to the skin side by the leg pressure at the time of wearing. Using this, even if a width direction fold line is provided within the formation range of the three-dimensional gather, the structure is such that it is automatically repaired by attaching a crease protruding to the non-skin side.

Specifically, it is a formation range of a three-dimensional gather, and is set as a range in which leg pressure inward from both sides acts when worn, and from the center in the longitudinal direction of the formation range of the wing-shaped flap, from the rear of the absorbent article Only one width direction fold line among the plurality of width direction fold lines is provided in the range within 60 mm on the side and in the rear side of the wing-shaped flap formation range . And, since the other width direction fold line is not provided in the formation range of the three-dimensional gather, but is provided in the back adhesive region where the gathered nonwoven fabric is joined to the absorber side, or both the back adhesive region and the front adhesive region, The folds protruding to the non-skin side are not promoted by the tension of the three-dimensional gather without being affected by the contraction force of the three-dimensional gather. Therefore, in the present absorbent article, a gap with the skin surface is less likely to occur when worn, and body fluid leakage can be prevented.

As this invention which concerns on Claim 2 , the said absorbent article is made into the 4-fold folded in the longitudinal direction by the three width direction fold lines in the individual packaging state,
Of the three width direction fold lines, one width direction fold line is provided in the formation range of the three-dimensional gather, and one width direction fold line is provided in the formation range of the rear adhesion region, and the rest the one widthwise fold line of the absorbent article according to claim 1 Symbol placement is provided to the formation range of the front adhesive region is provided.

In the invention described in claim 2, and specifically define the position in the width direction fold line in the case of a quarto folded longitudinally the absorbent article in three widthwise fold lines individually packaged state Yes.

As this invention which concerns on Claim 3 , the said absorbent article is made into five folds folded in the longitudinal direction by the four width direction fold lines in the packaging state,
Of the four width direction fold lines, one width direction fold line is provided in the formation range of the three-dimensional gather, and two width direction fold lines are provided in the formation range of the rear adhesion region, and the rest the one widthwise fold line of the absorbent article according to claim 1 Symbol placement is provided to the formation range of the front adhesive region is provided.

In the invention described in claim 3, the position of the folding line in the width direction when the absorbent article is folded in the longitudinal direction with four widthwise folding lines in the individual packaging state is specifically defined. Yes.

As this invention which concerns on Claim 4 , the full length of the said absorbent article is 30 cm or more, The absorbent article in any one of Claims 1-3 is provided.

In the invention described in claim 4 , the absorbent article that is folded in a plurality of widthwise fold lines in an individual packaging state is intended for a relatively long absorbent article such as a night napkin having a total length of 30 cm or more. .

As the present invention according to claim 5 , the longitudinal length of the front adhesive region is 15% to 20% of the total length of the absorbent article. The absorbent article according to any one of claims 1 to 4 is provided. .

In the invention according to the fifth aspect , the length in the longitudinal direction of the front adhesive region is 15% to 20% of the total length of the absorbent article, so that it is long enough to provide a widthwise fold line in this range. Is secured.

According to a sixth aspect of the present invention, there is provided the absorbent article according to any one of the first to fifth aspects, wherein the longitudinal length of the rear adhesion region is 30% to 40% of the total length of the absorbent article. .

In the invention of claim 6 above, since two folding lines are provided in the rear adhesion region in the case of folding in five, etc., the length is 30% to 40% of the total length of the absorbent article longer than the front adhesion region. Forming.

  As described above in detail, according to the present invention, solid gathers are formed on both side portions on the front surface side, and even in an absorbent article folded in the longitudinal direction at a plurality of widthwise fold lines in an individual packaging state, A gap with the skin surface is less likely to occur, and body fluid leakage can be prevented.

It is a partial fracture development view of sanitary napkin 1 concerning the present invention. It is the II-II arrow directional view of FIG. It is the III-III arrow directional view of FIG. (A)-(D) are figures which show the individual packaging point at the time of four folding. It is the VV arrow directional view of FIG. 1 which shows the sanitary napkin 1 at the time of mounting | wearing. (A)-(C) are the figures which show the individual packaging point at the time of three folding. (A)-(E) are figures which show the individual packaging point at the time of five folds. It is an expanded view which shows the conventional sanitary napkin 50. It is the IX-IX arrow directional view of FIG. 8 which shows the sanitary napkin 50 at the time of mounting | wearing.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 3, the sanitary napkin 1 according to the present invention has a liquid-impervious back sheet 2 made of a polyethylene sheet and the like, and a liquid-permeable surface that allows permeation of blood or vaginal discharge quickly. Sheet 3, absorbent body 4 made of cotton-like pulp or synthetic pulp interposed between both sheets 2 and 3, and surrounding absorbent body 4 for maintaining the shape and improving diffusibility of absorbent body 4 A pair of left and right crepe papers 5 and a pair of left and right protrusions provided on the front side in a predetermined section in the front-rear direction so as to include at least the body fluid discharge portion H, with the side edges of the absorbent body 4 as standing base ends. Three-dimensional gather BS, mainly composed of gathered non-woven fabric 7 forming BS, and around the absorbent body 4, the liquid-impervious back sheet 2 and the liquid-permeable top sheet 3 at the upper and lower edges The outer edge of the hot The impervious back sheet 2 and the gathered nonwoven fabric 7 which are joined by adhesive means such as an adhesive or an adhesive means such as heat seal and extend laterally from the absorbent body 4 at both side edges thereof are hot. Bonded by an adhesive such as melt or an adhesive means such as heat seal, and the laminated sheet portion of the liquid-impermeable back sheet 2 and the gathered nonwoven fabric 7, the portion corresponding to the central portion of the body fluid discharge portion H is centered in the longitudinal direction. wing-shaped flaps W projecting laterally to parts, together with W is formed, the second wing-shaped flaps W _B to the portion located on the buttocks side of _this, is W _B are formed.

Hereinafter, the structure of the sanitary napkin 1 will be described in detail.
As the liquid-impervious back sheet 2, a sheet material having at least water shielding properties such as polyethylene is used. 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. One or a plurality of adhesive layers (not shown) are formed on the non-use surface side (outer surface) of the liquid-impermeable back sheet 2 so as to fix the sanitary napkin 1 to the underwear when worn on the body. It has become. As said liquid-impermeable back sheet 2, you may use the polylamination nonwoven fabric which laminated | stacked the plastic film and the nonwoven fabric.

  Next, as the liquid-permeable surface sheet 3, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. As the material fibers constituting the nonwoven fabric, in addition to olefins such as polyethylene or polypropylene, polyesters, polyamides, and other synthetic fibers, regenerated fibers such as rayon and cupra, and natural fibers such as cotton can be used. A nonwoven fabric obtained by an appropriate processing method such as a 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. When a large number of pores are formed in the liquid-permeable surface sheet 3, menstrual blood, venom, etc. (hereinafter collectively referred to as body fluids) are quickly absorbed, and are excellent in dry touch properties. It will be a thing.

  The absorbent body 4 interposed between the liquid-impervious back sheet 2 and the liquid-permeable top sheet 3 is made of, for example, fluffy pulp and a water-absorbing polymer. The water-absorbing polymer is mixed in the pulp constituting the absorber, for example, as granular powder. Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolved pulp, and artificial cellulose fibers such as rayon and acetate. Softwood pulp having a longer fiber length than hardwood pulp functions and It is preferably used in terms of price. 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 absorbent body 4 includes a base absorbent body 4A having a substantially rectangular shape long in the longitudinal direction of the napkin and disposed at almost the entire length of the sanitary napkin 1, and at least a portion corresponding to the blood drainage port H of the wearer. The front middle-high part 4B, which is disposed in a region including the base, is formed higher on the skin side than the base absorbent body 4A, and is disposed on the rear part of the sanitary napkin 1 as necessary, on the skin side from the base absorbent body 4A. It is desirable to comprise from the back middle high part 4C formed high. The front middle and high part 4B is formed in a size that sufficiently covers the blood drainage port H of the wearer and the periphery thereof. The front middle high portion 4B may be formed only in a region corresponding to the blood drainage port portion, but it is preferable that the rear side extends to a region corresponding to the perineum. It is preferable that the front middle high portion 4B extends to a region corresponding to the perineum, and does not extend to a region corresponding to the rear groove groove. Thereby, in the area | region corresponding to a buttock groove | channel, the base absorber 4A becomes easy to deform | transform along a buttock groove | channel, and can improve adhesiveness with a skin surface. The rear middle / high part 4C is located behind the buttocks groove, and catches body fluid that leaks to the rear side through the buttocks groove.

  In the sanitary napkin 1, a pair of left and right along the substantially longitudinal direction of the sanitary napkin 1 by squeezing from the skin contact surface side (the outer surface side of the liquid-permeable surface sheet 3) of the sanitary napkin 1 in a predetermined pattern. It is preferable to form the compressed groove 16. The compressed groove 16 may be formed by a pair of left and right portions extending along the substantially longitudinal direction of the sanitary napkin 1 at least on both sides of the center line CL in the width direction. In addition to being formed on the outside, the front end portion and the rear end portion of the pair of left and right portions are connected to each other, and are formed in a shape that is elongated in the napkin longitudinal direction and closed in the circumferential direction as a whole.

  In addition, the front end pressing groove 16a having a substantially Ω shape in plan view is formed away from the pressing groove 16 and is separated from the pressing groove 16 to the rear side so as to surround the rear middle high portion 4C. The pressing groove 16b for the rear end in a substantially reverse Ω shape in plan view is formed. The squeezing groove 16a for the front end and the squeezing groove 16b for the rear end are for reliably absorbing the body fluid transmitted to the front side and the rear side of the sanitary napkin 1, respectively, and preventing the body fluid from leaking.

On the other hand, the width dimension of the liquid-permeable surface sheet 3 is slightly longer than the width of the absorbent body 4 as shown in the cross-sectional views of FIGS. The three-dimensional gathered BS stops covering only a part, and prevents the gathered nonwoven fabric 7 different from the liquid-permeable surface sheet 3, specifically menstrual blood, or the like from penetrating, or has a touch feeling. Depending on the purpose such as enhancement, the nonwoven fabric material is subjected to appropriate water repellent treatment or hydrophilic treatment. The gathered nonwoven fabric 7 can be made of natural fibers, synthetic fibers, regenerated fibers, or the like and formed by an appropriate processing method. Preferably, the gathered nonwoven fabric 7 eliminates the feeling of stickiness and prevents stuffiness. For this reason, it is preferable to use a non-woven fabric with reduced basis weight and air permeability. Specifically, it is desirable to use a nonwoven fabric prepared with a basis weight of 13 to 23 g / m ² , and silicon-based, paraffin-based, alkylchromic chloride-based water repellents and the like for reliably preventing the permeation of body fluids. A water repellent nonwoven fabric coated with is preferably used.

As shown in FIGS. 2 and 3, the gathered nonwoven fabric 7 has an outer portion from the intermediate portion in the width direction from the inner position of the absorbent body 4 to slightly beyond the absorbent side edge to the outer edge of the liquid-impermeable back sheet 2. Adhering with an adhesive such as hot melt over a range, the laminated sheet portion of the gathered nonwoven fabric 7 and the liquid-impervious back sheet 2 makes the portion substantially coincident with the central portion of the body fluid discharge portion H in the longitudinal center. parts and the absorbing side portions a pair of left and right wing flaps W to the position, to form a W, a second wing-shaped flaps W _B now to the buttocks side _position, to form a W _B. These wing-shaped flaps W, W and second wing-shaped flaps W _B, W, respectively on the outer surface side adhesive layer 12 of the _B ..., 13 ... comprises a, when worn for shorts, the wing-shaped flaps W, W are folded line It is folded back to the opposite side at the RL position and wrapped around the crotch portion of the shorts to be fastened.

  On the other hand, the inner side portion of the gathered nonwoven fabric 7 is folded almost double, and a double-sheet elastic elastic member in which both ends or appropriate positions in the longitudinal direction are fixed at the intermediate portion in the height direction 14 and a plurality of thread-like elastic stretch members 15 are disposed on the upper portion of the thread-like elastic stretch member 14 in a state where both ends or appropriate positions in the longitudinal direction are fixed. As shown in FIG. 3, the double sheet portion is bonded to the absorbent body 4 side in a state of being folded and laminated in a Z-shaped cross section, as shown in FIG. The three-dimensional gathers BS, BS standing on the surface side are formed while forming the pockets P, P with the openings facing inward in the shape of a cross section with the portion where the thread-like elastic elastic member 14 is disposed as a bending point. ing.

  The gathered nonwoven fabric 7 has a gathered formation area A1 in which the three-dimensional gather BS in the middle part is formed with respect to the longitudinal direction of the sanitary napkin 1, and the gathered nonwoven fabric 7 in a cross-section Z shape in front of the gathered formation range A1. A front adhesive region A2 that is folded and laminated and bonded to the absorbent body 4 side by a bonding means such as hot melt adhesive, thermocompression bonding, or ultrasonic wave, and the gathered nonwoven fabric 7 is formed in a cross-section Z shape behind the gather formation range A1. It has a back adhesion region A3 that is folded and laminated and adhered to the absorber 4 side by a joining means such as hot melt adhesive, thermocompression bonding, or ultrasonic waves. The three-dimensional gather BS stands on the skin side over the entire gather formation range A1, and no fixed portion to the absorber 4 side is formed at the intermediate portion. For this reason, side leakage can be reliably prevented over the entire gather formation range A1. The gather formation range A1 is provided in a range that overlaps at least the entire region corresponding to the blood drainage port H in the napkin width direction, and at least a part of the wing-shaped flap W and the front middle-high portion 4B is shown in FIG. In the example, it is provided in a range overlapping with all of the wing-shaped flap W and the front middle-high part 4B in the napkin width direction.

The sanitary napkin 1 preferably has a total length of 30 cm or more, preferably about 30 cm to 45 cm, such as a night sanitary napkin. Etc. In this way night for a sanitary napkin which total length is relatively long form, the wing-shaped flaps W and second wing-shaped flaps W _B are provided, it is folded into a plurality of longitudinally individually packaged state.

  As shown in FIGS. 1 and 4, the sanitary napkin 1 having the above configuration is folded in the longitudinal direction at a plurality of widthwise fold lines in an individual state.

As shown in FIG. 1 and FIG. 4, the individual packaging in the case of quadruple folding in the longitudinal direction at the three folding lines in the width direction (X1, X2, X3 from the rear side of the sanitary napkin 1). in detail the procedure, as shown in FIG. 4 (a), respectively both wing-shaped flaps W and second wing-shaped flaps W _B, the outer vicinity as polygonal line folded in a Z-shaped gather nonwoven fabric 7, It folds to the liquid-permeable surface sheet 3 side including the outer periphery flap of a side part. Next, wing-shaped flaps W exposed on the surface side, outer surface adhesive layer 12, 12 and the second wing-like flaps provided in the side W of W _B, W adhesive layer 13 provided on the outer surface side of the _B, A release material 17 that integrally covers 13 is disposed.

When the release material 17 is provided, the sanitary napkin 1 is individually mounted with the individual sheet 18. 4 as shown (A), the width is narrower than the developed width of the width dimension napkin 1 (wing-shaped flaps W, W or the second wing shape flaps W _B, distance between the tips of the W _B), wing-shaped Due to the individual sheet 18 having a predetermined length that is wider than the folded state of the flaps W and W and the second wing-shaped flaps W _B and W _B , at least the opening side edge 18a of the individual sheet 18 is the front and back of the napkin 1 The napkin 1 is disposed on the individual sheet 18 so as to be located outside one of the end portions.

  Thereafter, as shown in FIG. 4 (B), when the rear end of the napkin is folded to the liquid-permeable surface sheet 3 side with the individual packaging sheet 18 at the position of the width direction fold line X1, FIG. As shown in the figure, the folded napkin rear end portion is folded along the width direction fold line X2 together with the individual sheet 18 and the release material 17 to the liquid-permeable surface sheet 3 side. Thereafter, as shown in FIG. 4 (D), the front end portion of the napkin 1 is folded at the position of the widthwise fold line X3, and the open side edge portions 18b and 18b of the individual sheet 18 are embossed and heat-sealed. It is made to seal by an appropriate sealing means such as an adhesive alone or in combination. Further, the opening side edge 18a of the individual packaging sheet 18 is preferably sealed with a tag tape 19 after being bonded with an adhesive.

  In the sanitary napkin 1, the intermediate width direction fold line X2 among the above-described three width direction fold lines X1 to X3 is a gather formation range A1 in which a three-dimensional gather BS is formed, It is provided in the fold line installation range 22 in the gathers, which is the range in which the inward leg pressure acts. In the formation range A1 of the three-dimensional gather BS, only one of the width direction fold lines X2 arranged in the fold line installation range 22 is provided, and the other width direction fold lines X1 and X3 are the gather formation range A1. Is not provided.

  The width direction fold lines X1 and X3 other than the width direction fold line X2 provided in the gather formation range A1 are the formation range of the rear adhesion region A3 or both the formation range of the rear adhesion region A3 and the formation range of the front adhesion region A2. Is provided. In the example shown in FIG. 1, the rear side width direction fold line X1 is provided in the formation range of the rear adhesion region A3, and the front side width direction fold line X3 is provided in the formation range of the front adhesion region A2.

  When the width direction fold line is provided in the gather formation range A1, as shown in FIG. 9, the yarn-like elasticity is projected to the non-skin side by the folds folded at the fold line, and this protruding state is arranged in the three-dimensional gather. It is encouraged by the contraction force of the elastic member and further protrudes to the non-skin side. Therefore, in the sanitary napkin 1, the width forming line X2 is positioned in the gather forming range A1 in the napkin structure based on the idea that the gather forming range A1 has as few folding lines as possible. While allowing it to be unavoidable, the position of the width direction fold line X2 provided in this gathering range A1 is a position where leg pressure is likely to be applied from the width direction both sides to the inside inside the base portion of the leg when worn. By using the fact that the surface of the sanitary napkin 1 swells to the skin side due to the leg pressure at the time of wearing, there is a fold that protrudes to the non-skin side even if the width direction fold line X2 is provided in the gather formation range A1. It is structured so that it can be automatically fixed by mounting. Further, the width direction fold lines X1 and X3 other than the one width direction fold line X2 provided in the gather formation range A1 are provided not in the formation range of the three-dimensional gather BS but in the rear adhesion region A3 and the front adhesion region A2. Therefore, the folds protruding to the non-skin side are not promoted without being influenced by the contraction force of the thread-like elastic elastic member arranged in the three-dimensional gather BS. Therefore, the sanitary napkin 1 is less likely to have a gap with the skin surface when worn, and can prevent body fluid from leaking.

  The range in which leg pressure inward from both sides acts on when wearing is the range in which pressure inward from both sides in the width direction acts on the inside of the base of the leg of the crotch part, mainly in the standing state at the time of wearing. That is.

  More specifically, the width-direction fold line X2 provided in the fold line setting range 22 in the gather is the formation range A1 of the three-dimensional gather BS, and is 60 mm from the central part N of the body fluid discharge part H to the rear side of the napkin. Within the range 21 and in the range behind the body fluid discharge part H. This range is a range in which the above-described leg pressure is particularly likely to be applied, so that the folds are more easily repaired when worn.

  In the case of the sanitary napkin 1 in which the wing-shaped flap W is formed as in the present example, the in-gather fold line installation range 22 is moved from the longitudinal center of the formation range of the wing-shaped flap W to the napkin. It is also possible to set a range 21 within 60 mm on the rear side and a range on the rear side from the formation range of the wing-shaped flap W. In addition, since it installs so that the longitudinal direction center part of the wing-shaped flap W may match | combine with the center part of the bodily fluid discharge part H, the longitudinal direction center part of the wing-shaped flap W and the center part N of the bodily fluid discharge part H correspond. Yes.

  The length in the longitudinal direction of the front adhesive region A2 is preferably 15% to 20% of the total length of the sanitary napkin 1 in order to ensure a sufficient length when providing a widthwise fold line in this region, More preferably, it is 17% to 20%.

  The longitudinal length of the rear adhesive region A3 is such that two folding lines may be provided in the case of five folds, which will be described in detail later. It is preferable to provide a longer dimension than the area A2, and preferably 30% to 40% of the entire length of the sanitary napkin 1.

  Further, the length of the gather formation range A1 in the longitudinal direction is preferably 40% to 55% of the total length of the sanitary napkin 1.

  The thickness of the main body portion through which the widthwise fold line X2 provided in the gather formation range A1 passes is 8 mm or more, preferably 8 mm to 20 mm. By setting the thickness of the main body portion through which the fold line X2 passes to be 8 mm or more, the napkin surface becomes higher and rises to the skin side when leg pressure is applied, so that the napkin surface is easily adhered to the skin surface. This thickness is the maximum thickness of the main body portion. As shown in FIGS. 1 and 2, when the widthwise fold line X2 passes through the front middle-high portion 4B, the maximum thickness of the middle-high portion 4B portion is taken. is there.

  The thickness is measured using a digital gauge (PEACOCK PDN-21, main specification is measuring range: 20 mm, measuring force 1.5 N or less) manufactured by Ozaki Seisakusho. The measuring method is that a digital gauge is installed in a horizontal place, the sanitary napkin 1 is opened and unfolded, the individual sheet 18 is removed, and the center in the width direction of the folding line X2 is sandwiched between the dial gauges. To do.

  The width direction fold line X2 provided in the gather formation range A1 is preferably provided at a position crossing the front middle-high portion 4B. As described above, the front middle-high portion 4B is formed at a middle height from a range that sufficiently covers the blood drainage port H of the wearer and its periphery to a range corresponding to the perineum of the wearer. In particular, it is a portion where leg pressure is easily applied, and when the napkin surface is raised to the skin side, it easily comes into contact with the skin surface.

  Next, the individual packaging procedure when the folding method during individual packaging is changed will be described. FIG. 6 shows a case where the sanitary napkin 1 is tri-folded in the longitudinal direction along two widthwise fold lines X1 and X2 in the individually packaged state. In this case, the width direction folding line X2 on the front side is provided in a range in which the three-dimensional gather BS is formed, and a leg pressure inward from both sides acts upon wearing. Further, the rear width direction fold line X1 is provided in the formation range of the rear adhesion region A3.

As with the 4-fold above, as shown in FIG. 6 (A), both the wing-shaped flaps W, W and second wing-shaped flaps W _B, respectively W _B, the liquid-permeable surface sheet 3 side The release material 17 is disposed so as to be integrally folded and cover the pressure-sensitive adhesive layers 12, 12, 13, 13 exposed on the surface side. When the release material 17 is provided, the sanitary napkin 1 is individually mounted with the individual sheet 18. In individual packaging, as shown in FIG. 6 (A), if the rear end portion of the napkin is folded to the liquid-permeable surface sheet 3 side together with the individual packaging sheet 18 at the position in the width direction folding line X1, FIG. B), the front end portion of the napkin 1 is folded to the liquid-permeable surface sheet 3 side at the width direction fold line X2, and the opened side edge portions 18b and 18b of the individual packaging sheet 18 are sealed. The opening side edge 18a of the covering sheet 18 is preferably bonded with an adhesive and then sealed with a tag tape 19.

  Next, as shown in FIG. 7, when the fold is folded in the longitudinal direction along the four widthwise fold lines X1 to X4 in the individual packaging state, one widthwise fold is included in the gather formation range A1. The line X3 is provided, the rear two widthwise fold lines X1 and X2 are respectively provided in the formation range of the rear adhesive region A3, and the remaining one front width fold line X4 is the front adhesive region A2. It is provided in the formation range.

For 5-fold also as in the case of 4-fold above, as shown in FIG. 7 (A), both the wing-shaped flaps W, W and second wing-shaped flaps W _B, the W _B respectively pervious A release material 17 that is folded on the surface sheet 3 side and integrally covers the adhesive layers 12, 12, 13, 13 exposed on the surface side is disposed. When the release material 17 is provided, the sanitary napkin 1 is individually mounted with the individual sheet 18. In the case of individual packaging, as shown in FIG. 7 (A), if the rear end of the napkin is folded to the liquid-permeable surface sheet 3 side together with the individual packaging sheet 18 at the position in the width direction fold line X1, FIG. As shown in FIG. 7B, the folded rear end is folded at the widthwise fold line X2, and further folded at the widthwise fold line X3 as shown in FIG. As shown in D), the front end portion of the napkin 1 is folded to the liquid-permeable surface sheet 3 side at the width direction fold line X4, and the open side edge portions 18b and 18b of the individual packaging sheet 18 are sealed. The opening side edge 18a of the covering sheet 18 is preferably bonded with an adhesive and then sealed with a tag tape 19.

[Other examples]
(1) In the above-described embodiment, as the three-dimensional gather BS, the inner side portion of the gathered nonwoven fabric 7 is folded into a cross-section Z shape, and the thread-like elastic elastic members 14 and 15 are disposed at predetermined portions, thereby forming a cross-sectional shape. It was supposed to stand on the surface side while forming the pocket P with the opening facing inward, but if it stood on the skin side, it was formed in a loop shape with a hollow cross section or directed outward or inward It can be formed with an arbitrary cross-sectional shape such as a linear shape.
(2) Although the sanitary napkin 1 in which the wing-shaped flaps W and W are formed has been described in the above embodiment, the present invention can be similarly applied to a sanitary napkin in which the wing-shaped flaps W and W are not formed.

DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Impermeable back sheet, 3 ... Liquid permeable surface sheet, 4 ... Absorber, 5 ... Crepe paper, 7 ... Gathered nonwoven fabric, 12.13 ... Adhesive layer, 14.15 ... Thread-like elastic expansion and contraction member, 18 ... Individual packaging sheet, 21 ... Range within 60 mm from N to the rear side, 22 ... Fold line installation range in gather, A1 ... Gather formation range, A2 ... Front adhesion area, A3 ... Back adhesion area , BS ... standing gathers, the longitudinal central portion of the formation range of N ... wing-shaped flaps W, W ... wing-shaped flaps, W B _... second wing-shaped flaps, X1 to X4 ... widthwise fold line

Claims (6)

An absorbent body is interposed between the liquid-permeable top sheet and the back sheet, and on both sides of the surface side, a three-dimensional gather with the middle in the longitudinal direction standing on the skin side is formed, and the front side and the rear side of the three-dimensional gather are are respectively disposed the gather nonwoven fabric joined to the absorbent body side at the front adhesive region and the rear adhesive region Rutotomoni, wing-shaped projecting laterally a portion matching the center of the fluid discharge section and the longitudinally central portion In an absorbent article in which a flap is formed and folded in the longitudinal direction at a plurality of widthwise fold lines in an individually packaged state,
Of the plurality of widthwise fold lines, one width direction fold line is the formation range of the three-dimensional gather, and within 60 mm from the center in the longitudinal direction of the formation range of the wing-shaped flap to the rear side of the absorbent article And the other fold line in the width direction is the rear adhesive region forming range or the rear adhesive region forming range and the front adhesive region forming. An absorbent article characterized by being provided in both of the ranges. The absorbent article is folded in four in the longitudinal direction at three widthwise fold lines in an individually packaged state,
Of the three width direction fold lines, one width direction fold line is provided in the formation range of the three-dimensional gather, and one width direction fold line is provided in the formation range of the rear adhesion region, and the rest one is the width direction fold line absorbent article of claim 1 Symbol placement is provided to the formation range of the front bond region of. The absorbent article is folded in five in the longitudinal direction at four widthwise fold lines in an individually packaged state,
Of the four width direction fold lines, one width direction fold line is provided in the formation range of the three-dimensional gather, and two width direction fold lines are provided in the formation range of the rear adhesion region, and the rest one is the width direction fold line absorbent article of claim 1 Symbol placement is provided to the formation range of the front bond region of. The absorptive article according to any one of claims 1 to 3 whose total length of said absorptive article is 30 cm or more. The absorbent article according to any one of claims 1 to 4, wherein a length in a longitudinal direction of the front adhesive region is 15% to 20% of a total length of the absorbent article. The absorbent article according to any one of claims 1 to 5, wherein a length in a longitudinal direction of the rear adhesion region is 30% to 40% of a total length of the absorbent article.

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