JP5379991B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article used for sanitary napkins, panty liners, incontinence pads, urine-absorbing pads and the like.

  The absorbent article has a liquid-permeable top sheet and a liquid-impermeable back sheet, and has a structure in which an absorbent body that absorbs and holds liquid is disposed therebetween. Regarding such an absorbent article, Patent Document 1 discloses a structure in which a top sheet is formed of a liquid-impermeable nonwoven fabric and a melt blow layer is provided between the absorber and the back sheet.

Patent Document 2 describes a structure in which a folded portion is formed on a liquid-impermeable back sheet, and a liquid-impermeable nonwoven fabric is bonded to the folded portion. The folded portion is formed toward the surface sheet side along both side edges in the longitudinal direction of the absorbent body. Patent Document 3 discloses a structure in which a side flap portion that extends outward in the same direction from both lateral edges of the absorber is formed by a composite sheet that is separate from the top sheet and the back sheet. The composite sheet is formed by contacting an inner layer made of a water-impermeable sheet of 5 μm or more and less than 20 μm and an outer layer made of a nonwoven fabric having a basis weight of 10 to 25 g / m ² .
JP 2000-104372 A JP 2005-211131 A Japanese Utility Model Publication No. 7-21020

  However, in the absorbent article described in Patent Document 1, there is a limit to the leak-proof function in the surface sheet made of non-woven fabric, and when a moderate pressure accompanying the intense movement of the wearer acts on the body fluid once blocked. , Body fluid permeates and causes side leakage. In particular, for fluids with high viscosity and low surface tension such as soft stool, there is a problem that the fiber assembly oozes out and leaks.

  In the absorbent article described in Patent Document 2, when a film having the same physical properties as the lower surface of the absorber is used for the back sheet, the water pressure can be increased and leakage of excrement can be prevented. Since the basis weight of the film is high on the lower surface of the absorber, where the risk of leakage of excrement is high, the basis weight is unnecessarily high even in other parts where it is difficult to apply body pressure. As a result, it becomes hard and feels bad, and the air permeability is not good, which causes stuffiness.

  In the absorbent article described in Patent Document 3, the material for bonding the absorbent body and the side flap portion on the side overlaps and is wasted. In addition, there is a need to dispose different materials on the absorber and the side, which increases the number of materials and complicates the equipment for manufacturing. Since an absorber and a side flap part are joined by bonding, there exists a possibility that joining may remove | deviate, and when it remove | deviates, there exists a possibility that excrement will leak.

  From the above, none of the prior arts is an absorbent article that can prevent bleeding and leakage, and can reduce stuffiness.

  Accordingly, an object of the present invention is to provide an absorbent article that can prevent bleeding and leakage and has good air permeability.

  The absorbent article of the invention of claim 1 is a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body that is disposed between the top sheet and the back sheet and absorbs and holds liquid. An absorbent body having a dorsal region, a crotch region, and a ventral region in the longitudinal direction from the dorsal side to the ventral side when worn, and a pair of left and right provided on both sides in the width direction of the absorbent body An absorbent article comprising a side flap portion, wherein the lower surface of the absorbent main body and the back sheet positioned on the side flap portion are formed as a continuous integral body, and the width direction edge and absorption of the side flap portion The side flap portion has a highly moisture permeable region having moisture permeability from the lower surface of the absorbent main body between the body side edge.

  Invention of Claim 2 is an absorbent article of Claim 1, Comprising: The said back surface sheet consists of a microporous liquid impervious film which consists of resin which contains an inorganic material as a filler, The said highly moisture permeable film A region is formed in the impermeable film.

  The invention according to claim 3 is the absorbent article according to claim 1, wherein the back sheet is formed by adhering a liquid-impermeable sheet and an exterior sheet, and the liquid-impermeable sheet is an inorganic material. It is made of a microporous liquid-impermeable film made of a resin containing as a filler, and the high moisture-permeable region is formed on the liquid-impermeable sheet and the exterior sheet.

  Invention of Claim 4 is an absorbent article of Claim 1, Comprising: The said back surface sheet | seat adhere | attaches a liquid-impermeable sheet | seat and an exterior sheet | seat, The said liquid-impermeable sheet | seat is an inorganic material. Characterized in that the highly moisture-permeable region is formed in the liquid-impermeable sheet, the exterior sheet, and the top sheet. To do.

  Invention of Claim 5 is an absorbent article of any one of Claim 1 thru | or 4, Comprising: On the both sides of the width direction of the said side flap part of the said back side area | region, this side flap part is A pair of left and right waist flap portions extending from both side edges of the waist flap portion are formed, and both sides in the width direction of the waist flap portion can be engaged with the liquid-impermeable back sheet in the ventral region when worn. A pair of locking members is provided.

  Invention of Claim 6 is an absorbent article of any one of Claim 1 thru | or 5, Comprising: An elastic member is a stretched state along the longitudinal direction of the said absorptive main body in the said side flap part. It is characterized by being arranged by.

  Invention of Claim 7 is an absorbent article of Claim 6, Comprising: The gather part by which the said elastic member is arrange | positioned in the expansion | extension state has moisture permeability from the highly moisture-permeable area | region of the said side flap part. It is characterized by being.

  Invention of Claim 8 is an absorbent article of any one of Claim 1 thru | or 7, Comprising: The said highly moisture permeable area | region is the width direction edge of the said side flap part, and an absorber side edge. It is characterized by being formed by extending the gap toward the outside in the width direction.

  Invention of Claim 9 is an absorbent article of any one of Claim 1 thru | or 8, Comprising: The moisture permeability of the said highly moisture-permeable area | region is the moisture permeability of the lower surface side of the said absorptive main body. On the other hand, it is 1.3 to 2.5 times or more, and is set so that the liquid does not leak.

  According to this invention, since the lower surface of an absorptive main body and the back sheet | seat by the side flap part side are made into the integral object, a bleeding and a leak can be prevented. Moreover, since the side flap part is a highly moisture-permeable region, the air permeability and the moisture permeability can be increased to prevent stuffiness.

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

(First embodiment)
FIG. 1 is a cross-sectional view of a diaper 1A according to a first embodiment of the present invention. A diaper 1 </ b> A that is an absorbent article includes an absorbent main body 2 and a pair of left and right side flap portions 10 provided on both sides in the width direction of the absorbent main body 2.

  The absorbent main body 2 includes at least a liquid-permeable top sheet 3, a liquid-impermeable back sheet 4, and an absorber 5 that is disposed between the top sheet 3 and the back sheet 4 and absorbs and holds liquid. It is configured. The top sheet 3 is folded so that both end portions in the width direction wrap around the absorber 5. The portion of the top sheet 3 folded in this way and the absorber 5 are joined to the back sheet 4 by glue such as hot melt.

As the surface sheet 3, a hydrophilic nonwoven fabric, a woven fabric, an opening plastic film, a hydrophobic nonwoven fabric having an opening, or the like can be used. In this embodiment, SMS 10 g / m ² is used. The absorbent body 5 is a laminated body having liquid absorption retention properties in which absorbent pulp and a superabsorbent polymer are mixed.

The back sheet 4 is formed of a liquid impermeable sheet. As the liquid-impermeable sheet, a microporous moisture-permeable sheet made of 22.0 g / m ² of polyethylene containing about 50% by weight of calcium carbonate as a filler is used. In addition to calcium carbonate, an inorganic material such as barium sulfate can be used as the filler. As the sheet resin, olefinic thermoplastic resins such as polypropylene can be used in addition to polyethylene.

  The side flap part 10 is formed in the part which extended the back surface sheet 4 to the right and left both sides from the lower surface of the absorber 5, and is located in the both sides of the absorber 5. FIG. The side flap portion 10 is provided with a highly moisture permeable region that is more permeable than the lower surface of the absorbent main body 2. In FIG. 1, reference numeral 6 denotes a highly moisture permeable region, which is provided on both the left and right sides of the absorbent main body 2. The moisture permeability of the highly moisture permeable region is 1.3 to 2.5 times or more than the moisture permeability on the lower surface side of the absorbent main body 2 and is set so that the liquid does not leak.

  A highly moisture-permeable region can be obtained by stretching the liquid-impermeable sheet in the width direction. The stretching process will be described in detail in a second embodiment described later.

  An exterior sheet 11 made of a liquid impermeable sheet is provided outside the side flap portion 10. A gathered portion in which the elastic member 12 is arranged in a stretched state is provided on the side edge portion of the exterior sheet 11. This gather part is more permeable than the highly moisture permeable region 6 of the side flap part 10. Accordingly, the relationship of moisture permeability in the diaper 1A is “the lower surface of the absorbent main body 2 <the highly moisture permeable region of the side flap portion 10 <the gathered portion”.

  In such 1st Embodiment, since the lower surface of the absorber 5 is the back surface sheet 4 which consists of a liquid-impermeable sheet, it can prevent a bleeding and a leak. Further, by stretching the side flap portion 10 in the width direction, the liquid-impermeable sheet (back surface sheet 4) is stretched by an amount corresponding to the stretched width, and the hole diameter of the micro-opening due to the filler is increased, resulting in high moisture permeability. It becomes. This increase in moisture permeability increases air permeability and moisture permeability, thus preventing stuffiness. Furthermore, since the material is softened by increasing moisture permeability, the feeling of use is improved.

(Second Embodiment)
2 to 7 show a second embodiment of the present invention, FIG. 2 is a plan view of the diaper 1B in a developed state, FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, and FIG. B line sectional drawing, FIG.5 and FIG.6 is a top view which shows the distance of moisture-permeation, FIG. 8 is sectional drawing of an extending | stretching apparatus.

  The diaper 1 </ b> B includes the absorbent main body 2 and a pair of left and right side flap portions 10 provided on both sides in the width direction of the absorbent main body 2, as in the first embodiment. The absorbent main body 2 includes at least a liquid-permeable top sheet 3, a liquid-impermeable back sheet 4, and an absorber 5 that is disposed between the top sheet 3 and the back sheet 4 and absorbs and holds liquid. It has a back side region S1, a crotch region S2, and a ventral region S3 in the longitudinal direction from the back side to the abdomen side and covers the wearer's back side, crotch side, and abdomen side.

  The back sheet 4 is formed by the liquid-impermeable sheet 13 and the exterior sheet 11. The back sheet 4 composed of the liquid-impermeable sheet 13 and the exterior sheet 11 forms the side flap portion 10. Moreover, the elastic member 12 is arrange | positioned at the side edge part of the side flap part 10 in the expansion | extension state. In the side flap portion 10, the portion where the exterior sheet 11 overlaps the liquid-impermeable sheet 13 is stretched in the width direction to increase moisture permeability, and the highly moisture-permeable region 6 is provided.

The top sheet 2 is a liquid-permeable sheet, and a hydrophilic nonwoven fabric, a woven fabric, an open plastic film, etc., and a hydrophobic nonwoven fabric having openings can be used. In this embodiment, SMS 10 g / m ² is used.

The liquid-impermeable sheet 13 in the back sheet 4 can be a moisture-permeable liquid-impermeable film or a sheet obtained by bonding a nonwoven fabric to this liquid-impermeable film. In this embodiment, a microporous moisture-permeable sheet made of 22.0 g / m ² of polyethylene containing about 50% by weight of calcium carbonate as a filler is used as the liquid-impermeable sheet 13. In this case, as the filler, an inorganic material such as barium sulfate can be used in addition to calcium carbonate. In addition to polyethylene, olefinic thermoplastic resins such as polypropylene can be used as the sheet resin.

The exterior sheet 11 in the back sheet 4 is a liquid-impermeable sheet, and in this embodiment, SMS 13 m / m ² is used. The exterior sheet 11 is arrange | positioned from the side of the absorptive main body 2 to the back surface, and the elastic member 12 is arrange | positioned in the expansion-contraction state in the right-and-left both-sides edge. The liquid permeable sheet 13 extends to the outside of the side portion of the absorber 3 and is bonded to the exterior sheet 11 with a heat sensitive adhesive (hereinafter referred to as HMA) or the like.

  The absorbent body 5 is a liquid absorbent retaining laminate in which absorbent pulp and superabsorbent polymer are mixed.

  In the back region S <b> 1, a waist flap portion 14 is provided outside the side flap portion 10. The waist flap part 14 consists of a liquid-permeable or liquid-impermeable sheet | seat, and has the latching members 15, such as mechanical latching and an adhesive tape, so that the absorbent article 1B can be fixed by a ventral | abdominal side part.

  In this embodiment, after the liquid impermeable sheet 13 is bonded to the exterior sheet 11 with HMA or the like to form the back sheet 4, the polyurethane elastic yarn 470 dtex as one elastic member 12 is scaled on the exterior sheet 11. It arrange | positions in an expansion | extension state by 2.2 times, and winds an elastic thread with the exterior sheet | seat 11. FIG. Further, after the portion where the exterior sheet 11 overlaps the liquid-impermeable sheet 13 is stretched in the width direction in the central region in the longitudinal direction of the side flap portion 10, the absorbent body 5 is disposed upward. Procedures other than this processing procedure may be used.

  Next, the highly moisture permeable region 6 provided in the side flap portion 10 will be described. The highly moisture permeable region 6 is formed on the back sheet 4 including the liquid impermeable sheet 13 and the exterior sheet 11. The highly moisture permeable region 6 is provided between the width direction edge of the side flap portion 10 and the side edge of the absorbent body 5, and is formed by stretching the back sheet 4 in this portion.

  FIG. 5 shows the part to be stretched. When the overall length of the diaper 1B is 470 mm, the width of the diaper 1B extends from the side part of the absorbent body 5 to the outer side in the width direction by 20 mm further to the outer side in the width direction. Stretching to increase moisture permeability. It should be noted that the location of high moisture permeability (stretching) is not a restriction requirement for the stretch length of the highly moisture permeable region in the crotch region because the design differs depending on the length of the diaper, the width of the absorbent body 5, etc. In the case of a type diaper / pants type diaper, it is preferable to provide the highly moisture permeable region 6 over the entire length between side flap portions arranged in the longitudinal direction (between the front and back panels in the case of pants).

  In the high moisture permeability method, the exterior sheet 11 and the liquid-impermeable sheet 13 are bonded with HMA or the like to form the back sheet 4 and then stretched using a stretching apparatus 30 shown in FIG.

  As shown in FIG. 7, the stretching device 30 has a pair of stretching blade rows 31 that face each other and can mesh with each other. Each of the extending blade rows 31 has a blade depth of 2.5 mm, a pitch between the upper and lower blades of 1.25 mm, and the number of upper and lower blades is 17, and the set temperature of the extending blade row 31 is 90. Stretching is performed at a temperature of ° C. By stretching in this way, the stretch ratio can be stretched to 1.8 times, and the moisture permeability average value 1935 (Pa · 24 hrs) before stretching is approximately 1.65 times to 3191 (Pa · 24 hrs) after stretching. Can be highly moisture permeable.

  At the time of high moisture permeability, the back sheet 4 is softened by heating the blade, and the basis weight is easily reduced, so that it is difficult to generate pinholes. The proper heating temperature is preferably 20 to 30 degrees or less of the material melting point. Note that heating at a temperature exceeding the material melting point of the liquid-impermeable sheet 13 is not preferable because the liquid-impermeable sheet 13 is melted and broken.

In this embodiment, a moisture permeable film 22.0 g / m ² (liquid impermeable sheet 13) and a liquid permeable SMS 13 m / m ² (exterior sheet 11) are bonded together with a spiral HMA diameter of 15 mm · 5 g / m ^2. A back sheet 4 was prepared, and the back sheet 4 was stretched. Table 1 shows the stretching results.

  5 and 6 show the distance of high moisture permeability (stretching). The width of the side flap portion 10 to be stretched is such that the side flap portion 10 has a width X (FIG. 5) from the side edge of the absorbent body 5 to the side edge of the side flap portion 10 in a state where the diaper 1B is widened. A width Y (FIG. 6) from the side edge of the absorbent body 5 when the crotch region is extended in the width direction to the inner side of the elastic member 12 disposed closest to the absorbent body 5 of the side flap portion 10 is 1.5. It is preferable to be in the range of double to 3.0 times. In the case of less than 1.5 times, since the stretch width of the highly moisture permeable region 6 is small, the height cannot be secured even when the side flap portion 10 stands up when the diaper is mounted. A gap is generated between and the excrement leaks out, which is not preferable. If it is larger than 3.0 times, the stretch width of the highly moisture permeable region 6 is large, so the moisture permeability is increased by stretching, and the material is likely to be damaged, and there is a high possibility of material breakage such as tearing or opening, When the material is damaged, excrement leaks from the damaged part, which is not preferable.

  The moisture permeability when the moisture permeability is increased (stretched) is preferably 1.3 to 2.5 times or more when the moisture permeability is higher than the moisture permeability before the moisture permeability. In this case, the moisture permeability before moisture permeation also means the moisture permeability on the lower surface side of the absorber. And if the difference in moisture permeability before and after moisture permeation is less than 1.3 times, the change in moisture permeability is small, so there is almost no change from before moisture permeation, and the effect of reducing stuffiness in diapers is low It becomes.

  The liquid-impermeable sheet 13 suitable for increasing moisture permeability (stretching) preferably has a film breaking elongation of 750% or more. A film having a breaking elongation of less than 750% is highly likely to cause a leak due to the occurrence of pinholes due to advancement of moisture permeability due to stretching.

  In the above embodiment, by stretching the side flap portion 10, the back sheet 4 is stretched by the stretched width, and the pore diameter of the fine holes by the filler is increased, so that the moisture permeability is increased. For this reason, in the highly moisture permeable area | region 6, compared with a non-highly moisture permeable area | region, material weight falls and a moisture permeability increases. In addition, the material becomes flexible due to high moisture permeability. Furthermore, the arrangement surface of the elastic member 12 can be kept higher than the surface of the liquid-permeable sheet by the stretched width. For this reason, as shown in FIG. 4, the pocket 16 which accommodates a bodily fluid can be enlarged.

  As described above, in this embodiment, the liquid-impermeable sheet 13 and the exterior sheet 11 are bonded to form the back sheet 4, and the side flap portion 10 on the side of the absorber 5 in the back sheet 4 is highly permeable to moisture. Since the highly moisture permeable region 6 is disposed, the film material is disposed on the side flap portion 10 to increase the water pressure resistance and prevent the body fluid from leaking out. In addition, since the air permeability and moisture permeability increase due to the effect of increasing moisture permeability, it is possible to prevent diaper stuffiness that causes skin troubles.

  In addition, since a region that is more flexible than the non-highly moisture permeable region is formed due to the high moisture permeability, the side flap portion 10 located on the inner surface of the diaper is soft and the discomfort is reduced. Moreover, the elasticity of the elastic member 12 increases, the side flap portion 10 rises upward from the diaper, fits easily on the body, and excrement does not easily leak out.

  Furthermore, since the high moisture permeable region is not disposed on the lower surface of the absorbent body 5 where the body pressure is the highest during wearing, the water pressure resistance can be maintained higher in this region than the high moisture permeable region. For this reason, even when a diaper is worn for a long time, excrement does not ooze out from the lower surface of the absorbent body 5 or moisture leaks out and the underwear or the futon is not wet. Thereby, even if it is arrangement | positioning of the material continuous in the same width direction, each suitable different effect can be provided in the air permeability of the side flap part 10 and the absorber 5 lower surface, moisture permeability, and water pressure resistance.

  In this embodiment, it is preferable that the liquid impermeable sheet 13 and the exterior sheet 11 constituting the back sheet 4 are bonded by the spiral HMA pattern 6. If the bonding area between the materials to be bonded is high density, such as a curtain or a coater HMA, the stretch of the liquid-impermeable sheet 13 when stretched is hindered by the exterior sheet 11 being bonded. For this reason, material damage is likely to occur due to stretching. In addition, it can be used by heating before stretching to soften the HMA. If the materials are partially bonded together and the bonding area is low density, such as spiral HMA, the stretch of the liquid-impermeable sheet 13 during stretching is not easily obstructed by the exterior sheet 11, and material damage due to stretching occurs. Hard to do.

  Moreover, the elastic member 1 should just be arrange | positioned in the non-low basic weight area | region of the side flap part 10 in the back surface sheet 4, and a number changes with the function and design of a diaper. In addition, when a plurality of elastic members 12 are arranged on the side flap portion 10 and the elastic material arrangement region is brought into contact with the wearer in a planar shape, the elastic member arranged closest to the absorber 5 is a high one. By placing it on the non-high moisture-permeable region side of the boundary between the moisture-permeable region and the non-high moisture-permeable region, it becomes easier to form a fold due to the rigidity difference between the high moisture-permeable region and the non-high moisture-permeable region. The non-elastic part of the part 10 is lifted, and the skin and the elastic member 5 arrangement part of the side flap 10 are fitted so as not to generate wrinkles, and the sealing performance can be improved.

(Third embodiment)
FIG. 8 shows a third embodiment of the present invention. In the diaper 1 </ b> C of this embodiment, the back sheet 4 is formed by bonding the liquid-impermeable sheet 13 and the exterior sheet 11. A top sheet 3 made of a liquid permeable sheet covering the absorber 5 extends sideways. The top sheet 3, the liquid-impermeable sheet 13, and the exterior sheet 11 are bonded together, and the bonded portion is highly moisture-permeable (stretched). By adopting such a structure, the body fluid that has flowed out from the side portion of the absorbent body 5 to the highly moisture permeable region 6 of the side flap portion 10 is again guided to the absorbent body 5 by the hydrophilic liquid-permeable sheet (surface sheet 3). It becomes possible to do.

(Fourth embodiment)
FIG. 9 shows a fourth embodiment of the present invention. In the diaper 1D of this embodiment, the side flap portions 17 and 18 are arranged in two rows on one side, and high moisture permeability (stretching) is applied to each of the two rows of side flap portions 17 and 18. Has been. In this structure, since the two side flap parts 17 and 18 are arrange | positioned at the absorber 5 side part, it becomes possible to make leakage prevention function double. Further, since the liquid-impermeable sheet 13 of the back sheet 4 is covered with the side flaps 18, the touch is also good.

(Fifth embodiment)
FIG. 10 shows a fifth embodiment of the present invention. In the diaper 1E of this embodiment, the side flap 10 is formed inwardly, and is similarly subjected to high moisture permeability (stretching). In this structure, since the side flap part 10 covers the absorber 5 surface, the area of the absorber 5 which contacts skin can be reduced, and the return of excrement to the skin can be reduced.

(Sixth embodiment)
FIG. 11 shows a sixth embodiment of the present invention. In the diaper 1F of this embodiment, the central portion 6a is made more highly permeable in the longitudinal central portion 6a and the end portion 6b of the highly permeable region 6 than in the end portion 6b. In this way, the central portion 6a is made more highly moisture-permeable than the end portion 6b, so that the pocket width of the central portion 6a is longer than that of the end portion 6b, and the volume of the crotch region where excrement tends to accumulate is increased. Can be kept wide. For this reason, leakage from the diaper can be suppressed.

  As processing for setting it as this embodiment, the height of the pushing blade of the edge part 6b and the center part 6a is changed, ie ,. By making the pushing-in height of the blade of the center part 6a higher than that of the end part 6b, the center part 6a can be made more highly permeable than the end part 6b. Further, the central portion 6a is made to be highly permeable in a wider area in the width direction than the end portion 6b, that is, the original area where the moisture permeability is increased is changed between the central portion 6a and the end portion 6b. The moisture permeability can be higher than that of the portion 6b.

(Other embodiments)
In the present invention, the diaper having moisture permeability (stretching process) on the side of the absorbent body 5 is not limited to the open type diaper. A pants type with both sides locked and fixed may be used. Since the volume of the crotch part where excrement can easily collect can be kept wide, leakage from the diaper can be suppressed.

  Moreover, this invention is applicable to absorbent articles, such as a sanitary napkin and a urine picking pad, without being limited to the said diaper.

  Further, as the liquid-impermeable sheet 13 used for the back sheet 4, a diaper is formed by stretching a film made of polyethylene containing about 50% by weight of calcium carbonate as a filler during the film manufacturing process to form a microporous material. You may use the sheet | seat which has moisture permeability from before the high moisture permeability at the time of a process.

Similarly, it is a film made of 15 to 40 g / m ² polyethylene containing 20 to 70% by weight of calcium carbonate as a filler, and a substantially unstretched non-moisture permeable sheet can be used during the film manufacturing process. . In this case, the back sheet 4 is stretched by the width stretched by the highly moisture-permeable stretching process performed at the time of diaper processing, and fine pores are formed by the filler to impart moisture permeability. Further, the portion of the lower surface of the absorbent body 5 where the body pressure is easily applied does not have a microporous material, so that the water pressure resistance can be kept higher, and the liquid can be effectively oozed out of the liquid-impermeable sheet 13. Can be prevented.

  In the present embodiment, a moisture-permeable film is used as the functional film, and polyethylene resin, polypropylene resin, and fluororesin are used as the breathable moisture-permeable resin, for example, by a melt film-forming stretching method to a thickness of 20 to 40 μm. Molded ones are used.

It is sectional drawing of 1st Embodiment of this invention. It is a top view of the unfolded state of 2nd Embodiment of this invention. It is the sectional view on the AA line of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is a top view which shows the distance of moisture permeability increase. It is a top view which shows the distance of moisture permeability increase. It is sectional drawing of an extending | stretching apparatus. It is sectional drawing which shows 3rd Embodiment of this invention. It is sectional drawing which shows 4th Embodiment of this invention. It is sectional drawing which shows 5th Embodiment of this invention. It is a top view which shows 6th Embodiment of this invention.

Explanation of symbols

1A, 1B, 1C, 1D, 1E, 1F Diaper 2 Absorbent body 3 Top sheet 4 Back sheet 5 Absorber 6 Highly moisture permeable region 10 Side flap part 11 Exterior sheet 12 Elastic member 13 Liquid impermeable sheet 14 Waist flap part 17, 18 Side flap part

Claims (6)

It is composed of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body that is disposed between the top sheet and the back sheet and absorbs and holds liquid. An absorbent body having a dorsal region, crotch region, ventral region in the longitudinal direction to the side;
An absorbent article comprising a pair of left and right side flap portions provided on both sides in the width direction of the absorbent main body,
The back sheet located on the lower surface of the absorbent main body and the side flap portion is composed of a continuous unit,
The side flap portion has a highly moisture permeable region having moisture permeability from the lower surface of the absorbent main body between the width direction edge of the side flap portion and the absorber side edge,
The back sheet is composed of a microporous liquid-impermeable film made of a resin containing an inorganic material as a filler,
The highly moisture permeable region is formed in the impermeable film;
On both sides in the width direction of the side flap portion in the back side region, a pair of left and right waist flap portions respectively extending from both side edges of the side flap portion are formed,
A pair of locking members that can be engaged with the liquid-impermeable back sheet of the ventral region at the time of wearing are provided on both sides in the width direction of the waist flap portion,
The highly moisture permeable region is formed in the side flap portion, not formed on the lower surface of the absorber ,
In the side flap portion, an elastic member is arranged in an extended state along the longitudinal direction of the absorbent main body,
The absorbent article , wherein the highly moisture permeable region is disposed on the inner side in the width direction than the elastic member disposed in the side flap portion . The absorbent article according to claim 1,
The said side flap part is arrange | positioned 2 rows | sides at one side, The absorbent article characterized by the above-mentioned. The absorbent article according to claim 1 or 2 ,
The absorbent article characterized in that the central portion in the longitudinal direction of the highly moisture permeable region is highly moisture permeable than the longitudinal end portion of the highly permeable region. The absorbent article according to any one of claims 1 to 3 ,
The gathering part in which the elastic member is arranged in an extended state has moisture permeability from a highly moisture permeable region of the side flap part. The absorbent article according to any one of claims 1 to 4 ,
The absorbent article, wherein the highly moisture permeable region is formed by extending a width direction end edge and an absorber side edge of the side flap portion toward a width direction outer side. An absorbent article according to any one of claims 1 to 5 ,
The moisture permeability of the highly moisture permeable region is 1.3 to 2.5 times or more than the moisture permeability on the lower surface side of the absorbent main body, and is set so that the liquid does not leak. Absorbent article.

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