WO2009133745A1 - Article absorbant jetable - Google Patents

Article absorbant jetable Download PDF

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Publication number
WO2009133745A1
WO2009133745A1 PCT/JP2009/056627 JP2009056627W WO2009133745A1 WO 2009133745 A1 WO2009133745 A1 WO 2009133745A1 JP 2009056627 W JP2009056627 W JP 2009056627W WO 2009133745 A1 WO2009133745 A1 WO 2009133745A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature change
article
substance
change substance
fused
Prior art date
Application number
PCT/JP2009/056627
Other languages
English (en)
Japanese (ja)
Inventor
健 井畑
麗 浅野
結城 堀江
Original Assignee
大王製紙株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2008119317A external-priority patent/JP5502287B2/ja
Priority claimed from JP2008119316A external-priority patent/JP5305725B2/ja
Priority claimed from JP2008143573A external-priority patent/JP4579313B2/ja
Priority claimed from JP2008250839A external-priority patent/JP4528853B2/ja
Application filed by 大王製紙株式会社 filed Critical 大王製紙株式会社
Priority to CN200980115121.8A priority Critical patent/CN102014831B/zh
Publication of WO2009133745A1 publication Critical patent/WO2009133745A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/42—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators with wetness indicator or alarm

Definitions

  • the conventional temperature change has a problem that both the degree of change and the change speed are insufficient for the amount of the temperature change substance used. For this reason, the conventional one has a low rate at which the wearer perceives and reports urination, for example, about 40% at most of disposable diapers for training containing cooling substances currently on the market. Then, the main subject of this invention is providing the disposable absorbent article which is excellent in temperature change efficiency, and can exhibit a larger temperature change faster.
  • the present inventors have obtained the following knowledge. That is, if the temperature-changing substance is simply contained in the absorber, urine held in the absorber without contacting the temperature-changing substance not only inhibits the temperature change but also the temperature-changing substance in the absorber. Even if the temperature change action due to is expressed, the temperature change is blocked by the heat insulating action inherently possessed by the absorber. In addition, when it is attempted to efficiently express the temperature change action by the temperature change substance, it seems to be desirable to arrange the temperature change substance at the urination site, but the urination site is the site where urine is supplied most continuously. The temperature change generated by the urine supplied earlier is weakened or canceled by the temperature of the urine supplied later. Moreover, these phenomena have an extremely large influence on the temperature change performance. The present invention has been made based on such knowledge.
  • ⁇ Invention of Claim 1> It has a front side portion that extends to the front side from the center in the longitudinal direction of the article, and a rear side portion that extends to the rear side from the center in the longitudinal direction of the article,
  • a disposable absorbent article comprising an absorbent portion in which an absorber is interposed between a liquid-permeable top sheet and a back sheet
  • the absorbent body extends 30 to 48% of the total length of the article from the center in the longitudinal direction of the article to the front side.
  • the absorbent body has a pocket portion having a thickness of 0 to 50% of the surrounding area including a portion of 20% of the total length of the article from the center in the longitudinal direction of the article, and the front end of the pocket portion and the absorbent body Formed so that the distance from the front end of the product is 5 to 30% of the total length of the article,
  • a temperature change substance that cools or heats urine by contact with urine is disposed,
  • a disposable absorbent article characterized by that.
  • the temperature-changing substance causes endothermic reaction when dissolved in urine, cools urine, and has a solubility in 100 ml of water at a temperature of 20 ° C. of 30 g or more,
  • the basis weight of the temperature change substance in the pocket is 500 to 1000 g / m 2 ;
  • the total area of the pocket portion is 2500 to 8000 mm 2 .
  • the total amount of heat change that can occur in the absorber due to the temperature change material is 20 cal or more,
  • the calorie change per unit area of the portion having the temperature change substance is 1 cal / cm 2 or more.
  • the above-described effects of the present invention become more remarkable.
  • the temperature-changing substance is a substance that changes its temperature when dissolved in urine
  • the absorbent article of the present invention has a structure in which urine after sufficiently diffusing and moving contributes to temperature change, part of the temperature change substance in the pocket portion remains undissolved and holds the urine whose temperature has changed. be able to. Then, since the urine held in the temperature change substance slowly advances the dissolution of the temperature change substance thereafter, the temperature change is more reliably transmitted to the wearer.
  • the absorber includes 120 to 200 g / m 2 of hydrophilic fibers and 170 to 220 g / m 2 of superabsorbent polymer particles, and the content of the superabsorbent polymer is higher than the content of the hydrophilic fibers.
  • the superabsorbent polymer is disposed at the highest density compared to the other regions of the absorber.
  • the superabsorbent polymer When the superabsorbent polymer is densely arranged around the pocket, at least near the front end of the pocket corresponding to the wearer's abdomen, it absorbs and maintains the temperature-changed urine to diffuse, and around the wearer's abdomen It is preferable because it can be limited to
  • an excretion indicator is also used to inform the wearer that urination has occurred, but if the excretion indicator is provided so as to overlap the pocket of the absorber, a small amount of Urine is preferable because discoloration is good even in urine.
  • the temperature change substance has hygroscopicity, it is not excreted due to contact with moisture in the air during storage (humidity) or contact with moisture released from the wearer's sweat or body during use. The excretion indicator will not change color.
  • the pocket portion containing the temperature change substance so as to include the urination position, because a sufficient temperature change can be generated even when the amount of urine is small or large.
  • the absorbent body extends 30 to 48% of the total length of the article from the center in the longitudinal direction of the article to the front side and 25 to 45% of the total length of the article on the rear side.
  • the pocket portion is formed in an annular shape so as to surround the central area of the absorbent body, and the line width thereof is 5 to 10% of the total length of the article.
  • the central area extends from the center in the longitudinal direction of the article to the front side of the article. 15 to 35%, and 15 to 35% of the total length of the article on the rear side, extending along the center in the width direction of the article, and the width is 40 to 75% of the total width of the absorbent body.
  • the disposable absorbent article according to claim 5.
  • the temperature change substance If the temperature change substance is contained in the form of powder and non-fixed as in the prior art, the temperature change substance moves from a predetermined site during the distribution process or use of the product, and the urine against the temperature change substance There is a risk that the temperature change becomes insufficient due to insufficient supply or temperature change not being sufficiently transmitted to the body.
  • the temperature-changing substance so as not to have a particulate matter in a solid and freely movable state inside the absorbent article as described above, or to have only a small amount, Most of the temperature change material does not move. Therefore, an expected temperature change occurs.
  • a temperature change substance causes a temperature change by contact with moisture. Therefore, in order to increase the contact efficiency with moisture, to keep the moisture whose temperature has changed in a part closer to the skin, and to prevent the temperature changing substance from touching the skin directly, It is preferable to set it as the sheet
  • the temperature change substance By fusing the temperature change substance in the absorbent article in this manner, the temperature change substance is reliably held at a predetermined position and is difficult to move. Therefore, an expected temperature change occurs. Further, since the fused temperature change substance is crushed, the hardening due to the fusion of the temperature change substance is reduced. This form includes that a part of the temperature change substance is pulverized and dropped from the member to be fused.
  • fused means a state in which the temperature change substance is solidified after adhering to the target (absorber) in a molten state, and the solidified body is fixed to the target.
  • the temperature change substance is sandwiched between a front surface side member and a back surface side member positioned on the front surface side and the back surface side, respectively, and a part thereof is fused to the front surface side member and the back surface side member, and the remaining portion is the It is not fused to the front side member and the back side member,
  • the fused portion of the temperature change material forms a frame shape, and the non-fused temperature change material is enclosed in a portion surrounded by the frame-like fused portion,
  • the inner side of the frame-like fusion part fused to the front-side member and the rear-side member is surrounded by the front-side member and the rear-side member in the front-back direction, and the periphery is frame-like fusion. If it is surrounded by the part, the temperature change substance arranged on the inside can move only within the range of the frame-like fusion part even if it is not fused. Therefore, the movement of the temperature change substance is suppressed, and the desired temperature change occurs. Moreover, since the fusion part of the temperature change material is frame-shaped, it becomes much more flexible than the whole surface fusion, and it is possible to suppress hardening due to fusion of the temperature change material.
  • fusion means a state in which the temperature-changing substance is solidified after adhering to the object in a molten state, and the solidified body is fixed to the object.
  • frame shape includes a form in which the fusion part of the temperature change substance is completely continuous, and a form having a partial discontinuity in a range in which the movement of the temperature change substance is suppressed.
  • the molded piece obtained by compression molding the particulate temperature-change substance as described above moves through the gap between the members and the gap between the fibers as compared with the particulate one. hard. Therefore, the movement of the temperature change material can be suppressed by incorporating the molded piece of such a temperature change material in a state of being sandwiched between the front surface side member and the back surface side member.
  • the compression-molded piece of particles has a porous structure, the surface area, that is, the contact area with moisture is much larger than that of a simple solidified product of temperature-change substance particles, so that the temperature change efficiency is hardly reduced or If it drops, it will be less. Therefore, although the temperature change substance is difficult to move, a sufficient contact area with the moisture of the temperature change substance is ensured, so that a desired temperature change occurs.
  • the molded piece is formed by compression molding sugar alcohol particles having an average particle size of 200 to 600 ⁇ m and a bulk density of 0.50 to 0.70 g / cm 3 so that the bulk density is 0.80 to 1.10 g / cm 3.
  • the abdominal exterior sheet 12F and the back exterior sheet 12B are formed by laminating two sheet-like materials 12 and 12 as shown in FIGS. 4 and 5. Although it extends only to the edge of the waist opening WO, the outer sheet-like material 12 positioned on the outside wraps around the edge on the waist side of the inner sheet-like material 12 and is folded back to the inside. 12r is extended so that it may cover to the waist side edge part of the interior body 200, and it is being fixed to the opposing surface with the hot-melt-adhesive agent.
  • the sheet-like material 12 is not particularly limited as long as it can be joined by welding, but is preferably a nonwoven fabric.
  • the nonwoven fabric is not particularly limited as to what the raw fiber is.
  • a plurality of first elongate elastic elastic members 15 are vertically spaced along the width direction at a predetermined stretch rate so as to be continuous over the entire width direction at each of the upper and both sides in the width direction. It is fixed in the stretched state.
  • a part of the first, second and third elongated elastic elastic members 15, 16 and 19, or the elastic force acts over the entire width direction of the back side main body part 13 and the back side extension part 14. The whole can be provided across the interior body 200 from one side in the width direction to the other side.
  • the top sheet 30 has a property of transmitting liquid, and examples thereof include a porous or non-porous nonwoven fabric, a porous plastic sheet, and the like.
  • the nonwoven fabric is not particularly limited as to what the raw fiber is.
  • synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated.
  • the nonwoven fabric may be manufactured by any processing.
  • Examples of the processing method include known methods such as a spunlace method, a spunbond method, an SMS method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method.
  • a nonwoven fabric processed by the spunbond method or the SMS method is suitable in terms of excellent balance between thinness and strength in order to make it easy to detect temperature changes from the surface side, and a nonwoven fabric processed by the air-through method is low. Even the basis weight is suitable because it absorbs quickly and has a smooth feeling.
  • the top sheet 30 may be composed of a single sheet or a laminated sheet obtained by bonding two or more sheets. Similarly, the top sheet 30 may be composed of a single sheet or a laminate of two or more sheets in the planar direction.
  • the thickness is about 0.1 to 3 mm, particularly 0.5 mm or less, and the basis weight is about 10 to 40 g / m 2 , especially 25 g / m 2 or less. It is preferable because it has excellent heat conductivity from the back side to the skin.
  • both side portions of the surface sheet 30 pass between the liquid-impermeable sheet 11 and the barrier cuffs 60 and 61 to the back side of the absorbent element 50 to prevent liquid penetration. Therefore, it is preferable to adhere to the liquid-impermeable sheet 11 and the barrier cuffs 60 and 61 with a hot melt adhesive or the like. Thereby, the effect that the rigidity of the both sides of the interior body 200 is improved is also obtained.
  • the second sheet 44 (see FIG. 20C) having a higher liquid permeation rate than the top sheet 30 can be provided in order to quickly transfer the liquid that has passed through the top sheet 30 to the absorber.
  • This second sheet 44 not only quickly transfers the liquid to the absorbent body and enhances the absorption performance by the absorbent body, but also prevents the “reversed” phenomenon of the absorbed liquid from the absorbent body, and the top sheet 30 is always dried. It can be made into the state which carried out.
  • the second sheet 44 can be omitted.
  • Examples of the second sheet 44 include the same material as the top sheet 30, spunlace, spunbond, SMS, pulp nonwoven fabric, a mixed sheet of pulp and rayon, point bond, or crepe paper.
  • an air-through nonwoven fabric is preferable because it is bulky.
  • the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable.
  • Basis weight is preferably 20 ⁇ 80g / m 2, more preferably 25 ⁇ 60g / m 2.
  • the thickness of the raw fiber of the nonwoven fabric is preferably 2.2 to 10 dtex.
  • the second sheet 44 may be provided over the entire width in addition to being arranged in the center shorter than the width of the absorber 56.
  • the length of the second sheet 44 in the longitudinal direction may be the same as the length of the absorbent body 56 or may be within a short length range centered on the region that receives the liquid.
  • the material of the liquid-impermeable sheet 11 is not particularly limited.
  • the liquid-impermeable sheet 11 is substantially made of an olefin-based resin such as polyethylene or polypropylene, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet, or a waterproof film.
  • Non-woven fabrics that ensure liquid impermeability in this case, a liquid-impermeable sheet is composed of a waterproof film and a non-woven fabric).
  • materials having liquid impermeability and moisture permeability which have been used and used in recent years from the viewpoint of preventing stuffiness, can also be exemplified.
  • an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene, and the sheet is formed, and then stretched in a uniaxial or biaxial direction.
  • an olefin resin such as polyethylene or polypropylene
  • the microporous sheet obtained in this way can be given.
  • a sheet that is liquid-impermeable without using a film can also be used as the liquid-impermeable sheet 11.
  • the liquid-impermeable sheet 11 is preferably extended to both sides of the side surface 30 of the absorbent element 50 by wrapping around both sides of the absorbent element 50 in order to improve leakage prevention. Thereby, the effect that the rigidity of the both sides of the interior body 200 is improved is also obtained.
  • the width of this extended portion is suitably about 5 to 20 mm on the left and right.
  • the inner surface or the outer surface of the liquid-impermeable sheet 11 may be designed by printing or coloring. Further, a printed or colored design sheet, which is a separate member from the crotch outer sheet 12M, may be attached to the outside of the liquid-impermeable sheet 11. Further, an excretion indicator 80 whose color changes by contact with moisture can be provided inside the liquid-impermeable sheet 11.
  • the excretion indicator 80 is preferably provided between the liquid-impermeable sheet 11 and the absorber 56, and is preferably provided over 30% or more, particularly 60% or more of the entire length of the absorber 56, and at least the width of the absorber 56. It is preferable to be provided along the center of the direction.
  • the excretion indicator 80 may be provided on either the absorbent body 56 side or the liquid-impermeable sheet 11 side of the packaging sheet 58. Further, another member provided with the excretion indicator 80 may be disposed between the liquid-impermeable sheet 11 and the absorber 56. It is preferable that the excretion indicator 80 is provided so as to overlap with a pocket portion 57 of the absorber 56 described later, because discoloration is good even with a small amount of body fluid.
  • the excretion indicator 80 is preferably overlapped with the pocket portion 57, and the pocket portion 57 is provided so as to penetrate the absorbent body 56 in the vertical direction (the packaging sheet 58 exists). May also be preferred.
  • the barrier cuffs 60 and 61 are belt-like members extending along the both sides of the interior body 200 over the entire front-rear direction, blocking urine and soft stool that travel along the top sheet 30 in the lateral direction and prevent side leakage. It is provided to prevent this.
  • barrier cuffs 60 and 61 are provided double on the left and right sides of the interior body 200.
  • the inner barrier cuff 61 stands obliquely from the side of the interior body 200 toward the center in the width direction
  • the outer barrier cuff 60 is in the width direction of the inner barrier cuff 61.
  • the outer side portion is provided so as to stand upright from the side of the interior body 200, the base side portion stands obliquely toward the center in the width direction, and the tip side portion from the intermediate portion stands obliquely outward in the width direction.
  • the inner barrier cuff 61 folds the belt-like barrier sheet 62 having a length equal to the length in the front-rear direction of the interior body 200 in the width direction and folds it into two. Between them, a plurality of elongated elastic elastic members 63 are fixed along the longitudinal direction at intervals in the width direction. The elongated elastic elastic member 63 is not fixed to the barrier sheet 62 at the front and rear ends, and is fixed so that the barrier cuff extends and contracts in the middle part.
  • the barrier sheet 62 is made of a spunbonded nonwoven fabric (SS, SSS, etc.), SMS nonwoven fabric (SMS, SSMMS, etc.), a melt-blown nonwoven fabric having excellent uniformity and concealment, and water repellent with silicon as necessary.
  • a treated product can be suitably used, and the fiber basis weight is preferably about 10 to 30 g / m 2 .
  • the elongated elastic elastic member 63 rubber thread or the like can be used.
  • the thickness is preferably 420 to 1120 dtex, and more preferably 620 to 940 dtex.
  • the elongation at the time of fixation is preferably 150 to 350%, more preferably 200 to 300%.
  • a waterproof film can be interposed between the barrier sheets folded in two.
  • the arrangement position of the elongated elastic elastic member 63 in the middle is preferably in the range of 30 to 70% of the height of the inner barrier cuff 61 (length in the width direction of the protruding portion). In the infant paper diaper, the height of the inner barrier cuff 61 is preferably about 15 to 35 mm.
  • the end of the inner barrier cuff 61 opposite to the folded portion in the width direction is an attachment portion (inner attachment portion) 65 fixed to the back surface of the side edge of the interior body 200.
  • the portion is a protruding portion 66 (a portion on the folded portion side and corresponding to the inner protruding portion) protruding from the mounting portion 65, and both ends in the front-rear direction of the protruding portion 66 are hot melt adhesive on the surface of the surface sheet 30.
  • a front-rear fixing portion 67 by heat sealing, and a middle portion in the front-rear direction is an unfixed free portion (inner free portion), and an elongated elastic member 63 along the front-rear direction is fixed to the free portion in an extended state.
  • the outer barrier cuff 60 also has basically the same structure as the inner barrier cuff 61, but its attachment portion (outer attachment portion) 68 is an attachment portion 65 of the inner barrier cuff 61 on the back side of the interior body 200. Further, both ends in the front-rear direction of the projecting portion (outer projecting portion) 69 pass from the mounting portion 68 to the side of the interior body 200, and are fixed to the outer surface of the inner barrier cuff 61 on the center side in the width direction.
  • the inner barrier cuff 61 also has a structure in which the tip of the inner protruding portion is folded outward in the width direction, specifically, not more than 1/2 of the height of the inner barrier cuff 61 (width direction length of the protruding portion), If it is preferably 1/3 or less, a structure in which the tip side portion is folded back in the width direction and fixed to the base portion side portion similarly to the outer barrier cuff 61 may be adopted.
  • the number of the elongated elastic elastic members 63 provided in the free part (outer free part) of the outer barrier cuff 60 is preferably 2-6, and more preferably 3-5.
  • the arrangement interval 60d is suitably 3 to 10 mm. If comprised in this way, in the range which has arrange
  • the elongated elastic elastic member 63 may be disposed not only at the distal end side but also at the base side.
  • the elongated elastic elastic member 63 disposed on the outer barrier cuff 60 has the same thickness and elongation rate as the inner barrier cuff 61, but the thickness is the same as or larger than that of the inner barrier cuff 61, and the elongation rate is the inner barrier cuff 61. The same or lower than that of 61 is preferred.
  • the front-rear direction length L6 of the front-rear fixing portion 67 of the protruding portions 66, 69 is preferably formed so that the inner barrier cuff 61 is the same as or shorter than the outer barrier cuff 60, and is elongated in the barrier cuffs 60, 61.
  • the length of the elastic stretch member 63 in the front-rear direction is preferably formed so that the inner barrier cuff 61 is the same as or longer than the outer barrier cuff 60.
  • the barrier cuff is folded and fixed to the surface side substantially only at both ends in the front-rear direction, in the crotch part where the restriction to the center in the width direction by the front-rear fixing part 67 does not sufficiently act.
  • the outer barrier cuff 60 and the inner barrier cuff 61 both stand up outward in the width direction, and the pocket formed by the inner barrier cuff 61 becomes wider.
  • the linear root fixing part is positioned over 5 mm in the width direction from the side edge on the surface side, the barrier cuff rises toward the center in the width direction also in the crotch part, and the pocket formed by the inner barrier cuff 61 is narrow Therefore, it is not preferable.
  • a position of 0 to 20 mm from the side edge of the interior body 200 is appropriate, but it may be located beyond 20 mm.
  • the fixing target of the attachment portions 68 and 65 of the outer and inner barrier cuffs 60 and 61 can be an appropriate member such as the surface sheet 30, the liquid-impermeable sheet 11, and the absorbent element 50 in the interior body 200.
  • the other barrier cuff can be fixed to the interior body 200 via the one barrier cuff.
  • the contraction force of the elongated elastic elastic member 63 acts so as to bring the both ends in the front-rear direction closer, but the both ends in the front-rear direction among the protruding parts 66 and 69 do not stand up. However, only the free part stands up against the body side as shown in FIG. 3.
  • the outer and inner barrier cuffs 60 and 61 stand up so as to open outward in the width direction at the crotch portion and the vicinity thereof.
  • the barrier cuffs 60, 61 come into contact with the legs around the surface, and the fit is improved.
  • the inner and rear barrier cuffs 61 are restricted by the front and rear fixing part 67 so that the outer and inner barrier cuffs 60 and 61 do not open outward in the width direction.
  • the lower half of the outer barrier cuff 60 is also erected in the same manner, it is possible to surely prevent the abdomen and the back from leaking from both sides of the interior body 200.
  • the front and rear fixing portions 67 of the protruding portion 66 of the inner barrier cuff 61 are not folded back, and the front and rear fixing portions 67 of the protruding portion 68 of the outer barrier cuff 60 are folded outward.
  • 61 is maintained between the inner and outer free parts, and the outer and inner barrier cuffs 60, 61 are securely raised at a wide interval, and each fits around the leg, providing excellent leakage prevention. It will be.
  • the standing height of the inner barrier cuff 61 (the length in the width direction of the protruding portion 66 in the unfolded state).
  • W5 is preferably 10 to 50 mm, particularly preferably 15 to 35 mm
  • the standing height of the outer barrier cuff 60 (length in the width direction of the protruding portion 69 in the unfolded state) W6 is 15 to 60 mm, particularly 20 to 40 mm. Is preferred.
  • the separation distance W4 between the tips in a state where the inner barrier cuff 61 is tilted to the surface of the top sheet 30 is preferably 60 to 170 mm, particularly 70 to 120 mm.
  • the distance W3 between the innermost folds is preferably 60 to 190 mm, particularly 70 to 140 mm. Unlike the illustrated embodiment, only one of the outer and inner barrier cuffs 60 and 61 can be provided.
  • the absorption element 50 of this example has the absorber 56 and the packaging sheet 58 which wraps this absorber 56 whole, the packaging sheet 58 can also be abbreviate
  • the absorber 56 can be formed of an aggregate of fibers.
  • the fiber assembly preferably has hydrophilicity, and a tow (fiber bundle) of synthetic fibers such as cellulose acetate is opened as needed in addition to those obtained by stacking short fibers such as cotton pulp and synthetic fibers. Filament aggregates obtained by fibering can also be used.
  • the fiber basis weight can be, for example, about 120 to 200 g / m 2 when stacking cotton-like pulp or short fibers, and about 30 to 120 g / m 2 for filament aggregates, for example. Can do.
  • the fineness in the case of synthetic fibers is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 5 dtex.
  • the length in the front-rear direction of the absorber front end portion 56F is L1
  • the length in the front-rear direction at the overlapping portion between the absorber 56 and the ventral exterior sheet 12F is L2
  • the length of the absorber rear end portion 56B is The length in the direction is L3, the length in the front-rear direction at the overlapping portion of the absorber 56 and the backside exterior sheet 12B is L4, the minimum width of the constricted portion 56N is W1, the width of the absorber front end portion 56F and the rear of the absorber When the width of the end portion 56B is W2, it is preferable that the end portion 56B is configured to satisfy the following expressions (1) to (4).
  • the absorber 56 does not exist in the vicinity of the attachment portion 65 of the barrier cuffs 60, 61 in the crotch portion. Therefore, the degree of freedom of movement of the barrier cuffs 60, 61 increases, and the barrier cuffs 60, 61 Is easy to open outward in the width direction, and it is easy to hit the skin with the surface, and the followability of the fit surface to the movement of the leg is improved.
  • the standing of the barrier cuffs 60 and 61 is stabilized with this as a base point (fulcrum).
  • a portion extending from the front and rear sides to the crotch portion is a displacement portion in which the barrier cuffs 60 and 61 are opened outward from the posture in which the barrier cuffs 60 and 61 stand up inward in the width direction with reference to both side edges in the width direction.
  • the posture change of 60, 61 is supported by the absorber 56 that exists up to the side of the interior body 200, and the overall standing shape of the barrier cuffs 60, 61 is stabilized.
  • the degree of freedom of the barrier cuffs 60 and 61 becomes too high in the crotch part, and there is a possibility that a gap is easily formed around the leg, and both the front and rear sides of the crotch part
  • the standing of the barrier cuffs 60 and 61 may become unstable.
  • the constricted portion becomes too small, the degree of freedom of the barrier cuffs 60 and 61 is lowered, which is not preferable.
  • Superabsorbent polymer particles It is preferable to disperse and hold superabsorbent polymer particles throughout the absorber 56.
  • Superabsorbent polymer particles include “powder” in addition to “particles”.
  • particle diameter of the superabsorbent polymer particles those used in this type of absorbent article can be used as they are, and those having a particle size of 1000 ⁇ m or less, particularly 150 to 400 ⁇ m are desirable.
  • the material of the superabsorbent polymer particles can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable.
  • Superabsorbent polymer particles include starch, cellulose and synthetic polymers, such as starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, and sodium carboxymethylcellulose cross-link. Or an acrylic acid (salt) polymer can be used.
  • starch-acrylic acid (salt) graft copolymer such as starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, and sodium carboxymethylcellulose cross-link.
  • an acrylic acid (salt) polymer can be used.
  • shape of the superabsorbent polymer particles a commonly used granular material is suitable, but other shapes can also be used.
  • the superabsorbent polymer one integrated with an antibacterial substance can be used.
  • zeolite particles obtained by substituting some or all of the ion-exchangeable ions in the zeolite with silver ions (hereinafter referred to as antibacterial deodorant zeolite) are contained in the superabsorbent polymer or antibacterial.
  • Antibacterial deodorant superabsorbent polymer particles obtained by adhering deodorant zeolite particles to the surface of superabsorbent polymer particles by static electricity are suitable.
  • the superabsorbent polymer particles those having a water absorption rate of 40 seconds or less are preferably used. When the water absorption speed exceeds 40 seconds, so-called reversion in which the liquid supplied into the absorber 56 returns to the outside of the absorber 56 is likely to occur.
  • the overlap width 58W of the joint is it is preferable that the arrangement region of the temperature change substance 40 is narrower than the width 40W and has a dimension of 40 mm or less, particularly 20 mm or less. Even if it is made narrow like this, the superabsorbent polymer particles will not escape for the above reasons.
  • the seam of the packaging sheet 58 is also preferably formed near the side so as not to include the center in the width direction in contact with the urination port. In particular, it is preferable that the overlapping portion of the joint sheet of the packaging sheet 58 on the body side does not overlap with a portion having a temperature change substance described later.
  • a crotch outer sheet 12M exposed on the outer surface of the product is provided on the back side of the inner body 200.
  • the material of the crotch outer sheet 12M the same material as the abdominal outer sheet 12F and the back outer sheet 12B can be used, but a material containing a higher-strength material or a deodorant, etc.
  • a material different from the exterior sheet 12F and the back-side exterior sheet 12B may be used.
  • the crotch outer sheet 12M wraps around from the side in the width direction to the side of the body and is bonded and fixed to the outer surface of the barrier sheet 62 with a hot melt adhesive or the like, the rigidity of both sides of the interior body 200 is improved.
  • a sheet having high rigidity (roughness) as the crotch outer sheet 12M.
  • a sheet having a bending resistance measured by the Clark method (JISL1096 C method) and the sum of the MD direction and the CD direction of the sheet of 100 mm or more, preferably 150 mm or more may be used.
  • the pocket portion 57 in the illustrated example is within the range of 0 to 40% of the article total length L6 from the center in the longitudinal direction of the article to the front side, and the longitudinal length 57L is 10 to 20% of the article full length L6.
  • the width 57W is provided to be 25 to 60% of the entire width W2 of the absorber 56. It is preferable that the temperature change substance 40 is provided only in the pocket portion 57 of the absorber 56 as shown in the illustrated example from the viewpoint of not impairing the diffusibility of urine and cost-effectiveness. Can also be provided.
  • the temperature change material 40 is preferably provided uniformly throughout the pocket portion 57, but the amount may vary depending on the site.
  • the temperature change substance 40 is in contact with urine and absorbs or releases heat by heat of dissolution, heat of hydration, heat of reaction, etc., and cools or heats urine.
  • Examples of the temperature change substance 40 that absorbs heat by dissolution in urine include hydrated salts such as sodium acetate, sodium carbonate, sodium sulfate, sodium thiosulfate, and sodium phosphate, ammonium nitrate, potassium nitrate, ammonium chloride, potassium chloride, nitric acid
  • hydrated salts such as sodium acetate, sodium carbonate, sodium sulfate, sodium thiosulfate, and sodium phosphate, ammonium nitrate, potassium nitrate, ammonium chloride, potassium chloride, nitric acid
  • anhydrous salts such as sodium, sugar alcohols such as urea, xylitol and sorbitol.
  • the solubility in 100 ml of water at a temperature of 20 ° C. is 30 g or more, particularly 50 g or more. Those are preferred.
  • heat amount change of 20 cal / g or more is preferable, and what produces the calorie
  • heat amount change per unit area is 1 cal / cm ⁇ 2 > or more.
  • the excretion indicator 80 overlaps with the pocket part 57 as described above, in particular in the form in which the excretion indicator 80 overlaps with the pocket part 57 provided so as to penetrate the absorber 56 in the vertical direction, the moisture in the air during storage Due to contact with (humidity) or contact with moisture from the wearer's sweat or body in use, the excretion indicator may be discolored even though it is not excreted.
  • the temperature-changing substance 40 is a hygroscopic substance, for example, a substance having a high water solubility and a large surface area as described above (particularly, particulate sorbitol or xylitol is preferable). And the above-mentioned unexpected discoloration of the excretion indicator can be prevented.
  • the pocket portion 57 having a sufficiently large size is located substantially in the wearer's abdomen or lower abdomen, and the wearer's abdomen or lower abdomen bulges relatively on the body surface. It is easy to approach the temperature change part in the pocket part 57, and the temperature change in the pocket part 57 is easily transmitted to the wearer.
  • the pocket portion 57 containing the temperature change substance 40 is located on the rear side with respect to the article longitudinal direction center CL from the position of 25 to 45% of the article total length L6 on the front side with respect to the article longitudinal direction center CL. It is also preferable that the width is extended to the position of 20 to 40% of the total length L6 of the article along the center in the width direction of the article and 25 to 60% of the total width W2 of the absorbent body 56. In this embodiment, since the pocket portion 57 containing the temperature change substance 40 extends so as to include the urination position, there is an advantage that a sufficient temperature change can be generated even when the amount of urine is small or large. .
  • the pocket portion 57 in the illustrated example is provided in a rectangular shape, it can be formed in an appropriate shape such as a triangular shape within the above size range. Others are basically the same as the above embodiment, and thus the description is omitted.
  • the pocket portion 57 containing the temperature change substance 40 is formed in an annular shape so as to surround the central region 55 of the absorber 56, and the line width 57B is about 5 to 10% of the total length L6 of the article. It is also preferable that In this case, the central region 55 extends along the center in the width direction of the article by 15 to 35% of the article total length L6 on the front side and 15 to 35% of the article full length L6 on the rear side from the article longitudinal center CL.
  • the width is preferably 40 to 75% of the entire width W2 of the absorber 56.
  • the thickness of the packaging sheet 58 0.05 to 0.2 mm.
  • the weight of the packaging sheet 58 5 to 25 g / m 2 .
  • Type of temperature change substance 40 A substance that causes an endothermic reaction when dissolved in urine and cools urine. Solubility of temperature changing substance 40 (for 100 ml of water at a temperature of 20 ° C.): 30 g or more, in particular 50 g or more.
  • Total area of the pocket portion 57 2500 to 8000 mm 2 .
  • Temperature change substances basis weight in the pocket portion 57 (. Divided by the total area of the pocket portion the total amount of the temperature changing substance other the same.): 500 ⁇ 1000g / m 2.
  • Example 1 A pants-type disposable diaper having the structure shown in FIGS. 1 to 10 was produced. Detailed specifications are as follows.
  • Liquid-permeable surface sheet 30 an air-through nonwoven fabric composed of PE / PP composite fibers having a thickness of 2 mm and a basis weight of 25 g / m 2 .
  • Packaging sheet 58 crepe paper having a thickness of 1 mm and a basis weight of 15 g / m 2 .
  • the front end part is separated from the front end part of the absorber 56 by 75 mm in a rectangular range with a total length of 70 mm and a total width of 40 mm. The area is 2800 mm 2 .
  • the basis weight of the temperature change substance 40 in the pocket part 57 500 g / m 2 .
  • Composition of absorber 56 Pulp fiber and superabsorbent polymer particles (dispersed uniformly in the thickness direction of absorber 56 and in the direction perpendicular thereto). Pulp weight in the absorbent body 56: 110 g / m 2 .
  • the basis weight of the superabsorbent polymer in the absorber 56 160 g / m 2 .
  • Dimensions of absorber 56 From a position of 205 mm on the front side to the position of 190 mm on the rear side with respect to the center in the front-rear direction and from a position of 70 mm on the left side to a position of 70 mm on the right side with respect to the center in the width direction.
  • the area is 55,300 mm 2 .
  • Type of temperature change substance 40 Sorbitol (The heat of dissolution is minus 26 cal / g, “Sorbit” manufactured by Towa Kasei Kogyo Co., Ltd.) Solubility of temperature changing substance 40 (for 100 ml of water at a temperature of 20 ° C.): 70 g.
  • Example 1 according to the present invention has a faster temperature decrease rate and a lower minimum temperature than Example 2, and can maintain the minimum temperature for a sufficient time. there were.
  • the particulate temperature change substance 40 is heated and melted and solidified to be arranged in a solid state, and the temperature change substance 40 has a particulate matter in a state where it can freely move. It is also possible to have only a small amount or not to move the majority.
  • fusing point of 70 degreeC or more so that the temperature change substance 40 may not melt
  • examples of such a temperature change substance 40 include sorbitol and xylitol having a melting point of about 95 to 110 ° C. (varies depending on purity).
  • a material obtained by heating and melting the temperature change material 40 is fused and fixed to a member adjacent to the periphery, so that the temperature change material 40 does not move, and the temperature change reliably occurs in the fusion region (for example, the crotch portion).
  • the function comes to be demonstrated.
  • part of the temperature change substance 40 can also anticipate the effect as an adhesion part for adhering and fixing the upper and lower members.
  • the fusion site of the temperature change substance 40 is not particularly limited as long as it is a member adjacent to the periphery, but in the illustrated example, it can be at least one of the absorber 56 and the packaging sheet 58.
  • the fusion site is preferably the entire inside of the pocket portion 57, but can also be a part of the temperature change substance 40, when the temperature change substance 40 is contained outside the pocket portion 57.
  • the temperature changing substance can be fused to the adjacent member.
  • the temperature change substance 40 As a method of fusing the temperature change substance 40 to the fusion target such as the absorber 56, the temperature change substance 40 having an appropriate shape such as a particle (including powder) or short fiber is formed on the upper surface of the fusion target member. After being placed on a predetermined part or contained in a predetermined part inside the fusion target member (including when sandwiched between a plurality of members), the temperature change substance 40 is heated together with the fusion target member, and the temperature change substance It is possible to use a method in which only the temperature 40 is melted and attached to the fibers of the member to be fused, and then cooled to solidify the temperature change substance 40 (first method).
  • the temperature change material in the form of particles smaller than that before melting or a plurality of melted temperatures are obtained.
  • the bulky temperature change material 40 in which the change materials are integrated is attached to many places, or these are continuously attached to the temperature change material 40 such as a film or a skeleton.
  • a melt of the temperature change substance 40 is applied to a predetermined part of the member to be fused using a nozzle or the like.
  • a method of cooling and solidifying can also be used (second method).
  • the temperature change substance 40 when the temperature change substance 40 is contained in the fusion target member, the temperature change substance 40 such as particulates is mixed with the manufacturing raw material (fiber or the like) of the fusion target member.
  • the particulate temperature change material 40 is applied to the fusion target member more vigorously than the free fall by giving an initial velocity. Accordingly, the temperature change substance 40 can be allowed to enter the fusion target member.
  • the heating means in the first method is not particularly limited, but for example, the means shown in FIGS. 16 to 19 can be employed.
  • the means shown in FIGS. 16 and 17 utilize an air-through dryer that heats by passing high-temperature air.
  • the means shown in FIG. 16 after the fusion target member 300 in which the temperature change substance 40 is arranged at a predetermined portion is conveyed by the belt conveyor 301 and heated by hot air 302 that is passed in a direction orthogonal to the conveyance surface. In the same manner, cooling is performed by the wind 303 that is passed in a direction orthogonal to the conveying surface.
  • 17 (a) and 17 (b) is a suction roll 311 in which a fusion target member 300 in which a temperature change substance 40 is arranged in a predetermined portion is installed in a heating chamber 310 to which high-temperature air is supplied. It is heated by hot air 312 passed from the outside to the inside of the suction roll 311 while being wound around and then cooled by being wound around and transferred to a cooling roll 313 installed outside the heating chamber 310. is there.
  • the heating means shown in FIG. 18 wraps and transfers the fusion target member 300 in which the temperature change substance 40 is arranged in a predetermined portion around the heating roll 320, thereby bringing the heat of the heating roll 320 into contact with the temperature change substance. It heats from one side.
  • the heating means shown in FIG. 19 passes the fusion target member 300 in which the temperature change substance 40 is arranged in a predetermined portion between a pair of rolls 330, 331, 340, 341, at least one of which is a heating roll, The heat of the heating roll is transmitted to the temperature change substance by contact and heated.
  • both rolls 330 and 331 are smooth rolls with smooth surfaces and no irregularities are formed on the fusion target member 300, as shown in FIG.
  • any one of the rolls 340 may be an embossing roll having a predetermined pattern of unevenness on the surface, and the unevenness may be formed on one surface of the fusion target member 300.
  • the convex pattern of the embossing roll 340 is formed only in the region where the temperature change substance is fused, and only that region is heated. Since the fusion part is formed only in the region corresponding to the convex pattern of the embossing roll 340, the temperature change substance 40 may be arranged in a wider range than the convex pattern of the embossing roll 340. Thus, if the method of partially heating the fusion target member 300 is used, it is not necessary to arrange the temperature change substance 40 only in a predetermined region of the fusion target member 300.
  • the entire surface of the fusion target member 300 It is also possible to partially form the fused portion by disposing the temperature change substance 40 and heating only a predetermined region. Further, if the convex pattern of the embossing roll 340 has a plurality of heights, it is possible to separately form a portion where the temperature change material 40 is fused thickly and a portion where the temperature change material 40 is thinly fused.
  • the heating and melting of the temperature change material 40 in the first method is performed not only at the time of manufacturing the member to be fused, but also at an appropriate stage in the subsequent manufacturing process, for example, the assembly completion state of the interior body 200 (before assembly to the product state). Alternatively, after the assembly to the product state is completed, the inner body 200 and the entire diaper can be performed. As a heating method in this case, for example, the means shown in FIGS. 16 to 19 described above can be applied.
  • the surface-change material 40 fused to the member to be fused in the first method has a small surface area because it is once melted and liquefied and then solidified. Therefore, since the contact area with the urine in the temperature change substance 40 becomes small, the temperature change speed is suppressed and the sustainability is improved. However, if the rate of temperature change is uniformly reduced, the wearer may have difficulty perceiving the temperature change. Therefore, a particulate matter having a low bulk density is used as the temperature change substance 40, and not all of the particulate matter is melted, but a part thereof is melted to form a solid having a high bulk density, and the rest is left as a particulate matter having a low bulk density.
  • the particle-like temperature change substance 40 has the same particle size, the lower the bulk density, the larger the surface area and the higher the contact efficiency with urine, and thus the temperature change speed becomes faster. This tendency is particularly remarkable when the temperature change substance 40 is dissolved in urine to cause a temperature change. Therefore, as described above, when only a part of the temperature change substance 40 is melted, the temperature change substance 40 that maintains the particulate state has a quick temperature change action, and the melted and solidified temperature change substance 40 has a temperature change action. Therefore, a temperature change having both fast and slow effects can be obtained.
  • the residual ratio of the particulate matter is suitably about 30 to 70% by weight. Further, from the viewpoint of preventing the movement of the temperature change substance 40, the remaining proportion of the particulate matter is suitably about 0 to 50% by weight. Therefore, the residual ratio of the particulate matter is preferably 30 to 50% by weight.
  • the particulate temperature change substance 40 having a low bulk density porous particles such as granules, particles having many surface irregularities, and particles having fine pores on the surface or inside thereof are suitable.
  • the degree of the bulk density may be determined as appropriate, but is preferably 50% or less of the true density (having a void (space) of 50% or more with respect to the apparent volume).
  • the true density is so 1.50 g / cm 3, preferably bulk density is 0.75 g / cm 3 or less, more preferably 0.50 ⁇ 0.70g / cm 3, 0.55 ⁇ 0 .65 g / cm 3 is particularly preferred.
  • the particle size is large, the apparent bulk density is small, but the surface area is not large. Therefore, when the particulate temperature change material 40 is used, the average particle size (JIS K 1474-2007 median diameter) is 200 to 600 ⁇ m. It is preferable that
  • the temperature change substance 40 can be fused inside the diaper or to a member constituting the diaper, but only by this, the fused part becomes hard, the wearing feeling becomes hard, and the body fits. The nature is also reduced. Therefore, the following softening means are combined.
  • the first means applies mechanical pressure to the portion including the fused portion of the temperature change material 40 to break the fused temperature change material 40.
  • Such a treatment is preferable because a continuous treatment can be performed by pressing the member to be fused between the rolls.
  • the pressurization may be accompanied by heating, but it is preferable to pressurize without heating because the temperature change substance is difficult to break.
  • the arrangement of the pressurizing portions 45 can be determined as appropriate, and can be a staggered pattern as shown in FIG. 14B in addition to a matrix as shown in FIG. A part of the temperature change material 40 crushed and subdivided by the pressurization is released from the fused member and can move freely inside the diaper.
  • the amount of free substances (particulate matter) is small, specifically, about 0 to 30% by weight, particularly 0 to 10% by weight, based on the whole temperature change substance 40.
  • the particulate matter in a state where it can freely move in the diaper is granular or powder as long as it is not fixed to the member constituting the diaper and can be freely moved at least in the plane direction. It is not limited to the shape, and includes an appropriate shape such as a short fiber shape or a block shape.
  • the individual “particles” have a maximum length of 30 mm or less and a maximum weight of 1 g or less when the length is measured in an arbitrary direction. Of course, if the “particles” are too large, there is a sense of incongruity when worn, so the maximum length is actually 10 mm or less and the maximum weight is about 0.2 g or less.
  • the shape of the fused portion of the temperature change substance 40 is rectangular in the illustrated example, but may be a rhombus, triangle, or circle.
  • the arrangement of the fusion parts of the temperature change material 40 is a matrix in the illustrated example, but may be an arbitrary arrangement such as a staggered pattern.
  • the interval between the fused portions of the temperature change material 40 can be determined as appropriate, but is preferably about 3 to 15 mm in both the front-rear direction and the width direction.
  • the width 48 in the intermittent direction of each temperature change substance 40 is preferably about 3 to 40 mm, particularly about 5 to 10 mm.
  • the interval 47 between the fused portions of the temperature change material 40 is too wide or the width 48 is too narrow, the amount of the temperature change material 40 may be insufficient, and the interval 47 is too narrow or the width 48 is too wide. Then, there is a risk that flexibility will be insufficient.
  • the degree of softening by these methods can be adjusted as appropriate, but the rigidity of the portion having the fused portion of the temperature change substance 40 in the diaper is 15 to 50 cN / 50 mm, particularly 20 to 35 cN / 50 mm. preferable.
  • the rigidity of the portion of the temperature change material 40 that does not have the fused portion is preferably about 1 to 25 cN / 50 mm, particularly about 5 to 15 cN / 50 mm.
  • the difference in rigidity between the portion having and not having is preferably about 5 to 20 cN / 50 mm.
  • the rigidity means bending rigidity (rigidity), and is measured according to the following method in accordance with JIS K-7171 (plastic-bending rigidity test method).
  • the test piece is prepared by removing the elastic elastic member that affects the measurement from the inner body 200 and cutting it into a rectangle having a diaper longitudinal direction of 80 mm and a diaper width direction of 50 mm.
  • the inner side of the frame-shaped fusion part 41 is surrounded by the packaging sheet 58 that is the front-side member and the rear-side member in the front and back direction, and the periphery is surrounded by the frame-like fusion part 41, so
  • the non-fused particulate temperature change substance 42 can move only within the range of the frame-like fused portion 41. Therefore, the movement of the temperature change substance 40 is suppressed, and an expected temperature change occurs.
  • the fused portion 41 of the temperature change substance 40 has a frame shape, it becomes much more flexible than fusing the whole in a planar shape, and it is possible to suppress hardening due to fusion of the temperature change substance.
  • the number of the frame-like fused portions 41 may be only one, but it is preferable to provide a large number with a somewhat small size. In the latter case, a large number of quadrangular or circular frame-like fused portions can be provided, but it is preferable to provide a lattice-shaped fused portion 41 as shown in the figure.
  • a lattice pattern in addition to a pattern composed of a fusion line along the front-rear direction and a fusion line along the width direction, as shown in FIG. 22, a fusion line along an oblique direction intersecting with the front-rear direction and the width direction. It is also possible to use an oblique lattice pattern consisting of only the above. In the grid pattern, as shown in FIG.
  • the dimensions of the frame-like fused portion 41 can be appropriately determined, but the width 41w of the frame line is preferably about 1 to 5 mm, and the area inside the frame is preferably about 100 to 1000 mm 2 .
  • the length (center distance) 41d between intersecting positions is about 10 to 40 mm, and the intersecting angle ⁇ (inner side angle) is 60 to 120 degrees.
  • the 4L relationship is satisfied.
  • the position of the non-fused portion N is not limited to each intersection position, and the non-fused portion N may be located at a position other than each intersection position as long as the above relationship is satisfied.
  • the front side member and the back side member that sandwich the temperature change substance 40 it is preferable to use an existing member as shown in FIG. 20A, and an absorbent body 56 can be used in addition to the packaging sheet 58.
  • an absorbent body 56 can be used in addition to the packaging sheet 58.
  • a surface side member is made into a surface side absorber, and a back surface side member is a back surface It can also be used as a side absorber.
  • the fused portion 41 is formed only in the pressure heating region corresponding to the convex pattern of the embossing roll 340, and the other portion inside the frame is not pressurized and heated, and the temperature change Fusion of the substance 42 does not occur.
  • This first method is preferable because the frame-like fused portion 41 can be formed only by heat embossing of an appropriate pattern.
  • the difference between the fast-acting effect and the slow-acting effect can be made clearer. If the particle-like temperature change substance 40 has the same particle size, the lower the bulk density, the larger the surface area and the higher the contact efficiency with urine, and thus the temperature change speed becomes faster. This tendency is particularly remarkable when the temperature change substance 40 is dissolved in urine to cause a temperature change.
  • the material in the case of continuous production using a production line, it is preferable that the material is supplied in a continuous band shape and is cut into a predetermined dimension at predetermined intervals in the MD direction after the frame-shaped fusion part is fused.
  • the temperature change substance may spill from the cut end in the manufacturing process of the product, the transportation process to the sales destination, the usage process by the user, and the like. Therefore, as shown in FIG.
  • the heat emboss 41E forms a fused portion of a linear temperature change material along the CD direction as in the first method described above.
  • the surface side member 48 and the back side member 49 have a certain degree of extent. It may be simply bonded with strength.
  • Cutting in these methods is performed in advance prior to attachment to other members, and depending on the type of the front side member and the back side member, it can also be performed by cutting into individual products.
  • the molded piece 40T of the temperature change substance may be formed only from the temperature change substance 40 described above, but may be formed by mixing other substances as long as it is about 50% or less.
  • urine cooled or heated by the temperature change substance 40 is absorbed on the spot by the superabsorbent polymer and stops on the surface of the article. Can communicate.
  • hydrophilic fibers such as pulp and hydrophilic synthetic fibers may be mixed.
  • the compressive force increases, the bridge supported between the particles collapses, the voids are filled, and the particles themselves are deformed.
  • the part is destroyed and the newly formed fine particles fill the voids, and the particles are strongly adhered due to plastic deformation of the particles, and at the contact point of the particles, the surface melts due to the heat generated by sliding friction between the particles, and the particles are bonded. Even if the compressive force is removed, the shape does not collapse.
  • the compression-molded piece 40T of the temperature change material is formed using such a principle.
  • a binder can be used.
  • Sugar alcohols such as sorbitol and xylitol are suitable temperature-change substances in that the particles are easy to mold.
  • the degree of compression of the molded piece 40T can be appropriately determined according to the particle size, density, etc. of the raw material particles.
  • the raw material particles porous particles having a low bulk density such as granules, particles having a lot of surface irregularities, and particles having fine pores on the surface or inside are suitable.
  • the degree of bulk density of the raw material particles may be determined as appropriate, but it is preferably 50% or less of the true density (having 50% or more voids (space) with respect to the apparent volume).
  • the bulk density of the molded piece 40T is about 0.75 to 1.10 g / cm 3 , particularly It is preferable to perform compression molding so as to be about 0.80 to 1.00 g / cm 3 .
  • the size of the molded piece 40T can be determined as appropriate, but if it is too fine, it will move easily, and if it is too large, it will give a foreign object feeling. Therefore, a flat piece having a thickness of 0.5 to 2.0 mm and an area of 50 to 1000 mm 2 is used. Preferably there is. Further, the weight of the particulate matter remaining in the compression molding process, or the formed piece 40T is divided or subdivided by bending or the like in the subsequent diaper manufacturing process, and the strip having an area of 50 mm 2 or less existing in the article The weight of is preferably 50% or less, more preferably 30% or less, based on the total amount of the temperature-changing substance used. (That is, the weight ratio of the molded piece 40T having a thickness of 0.5 to 2.0 mm and an area of 50 to 1000 mm 2 with respect to the weight of the total temperature change material is preferably 50% or more, particularly preferably 70% or more. .)
  • both rolls 340 and 341 may be smooth rolls having no irregularities on their surfaces, or embossing rolls having irregularities of a predetermined pattern on either or both surfaces. You can also Even in the former case, since the entire particulate temperature change substance 40p is not compressed at a time, the whole does not become one large molded piece, but as shown in FIG. A large number of small pieces 40T are formed. In the latter case, a large number of small pieces 40T having a regular shape can be formed by the emboss pattern. Further, it is preferable that a small piece having an area of 50 to 1000 mm 2 is 50% or more.
  • the front side member and the back side member are sheets, it is easy to perform the above-described compression molding process before assembling these sheets to other members.
  • the product can be manufactured.
  • positioning and compressing the particulate matter of a temperature change substance between sheets a particulate matter may move between sheets between arrangement
  • the mixing ratio of the fibrous material is suitably 50% or less, preferably about 10 to 30%. Since sugar alcohols such as sorbitol and xylitol are easy to form particles, they can be formed even by mixing materials that are difficult to be compression-molded.
  • the superabsorbent polymer particles can also be mixed.
  • Such a manufacturing method can be adopted only by changing the pressurizing condition by compression molding using pressure, and it is very easy to apply to existing facilities.
  • the present invention can be applied to a wide range of uses such as pants-type, tape-type, or pad-type absorbent articles.
  • the disposable diaper for training it can be used for the purpose of suppressing bacterial growth, odor suppression, cooling prevention, etc. by cooling the excrement.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

La présente invention concerne un article absorbant jetable ayant une grande efficacité de changement de température et capable d'atteindre plus rapidement un changement de température plus important. Une poche (57) est formée à l'intérieur d'un corps absorbant (56) et pénètre dans la direction de la surface avant/surface arrière dans le corps absorbant (56), le corps absorbant s'étendant depuis le centre (CL) dans la direction avant-arrière d'un article jusqu'au côté avant de l'article, et comprenant la partie de l'article qui correspond à 20 % de la longueur totale (L5) de l'article. Une substance changeant de température (40) destinée à refroidir ou à chauffer l'urine par contact avec l'urine est placée dans la poche (57).
PCT/JP2009/056627 2008-04-30 2009-03-31 Article absorbant jetable WO2009133745A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200980115121.8A CN102014831B (zh) 2008-04-30 2009-03-31 一次性吸收性物品

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JP2008119317A JP5502287B2 (ja) 2008-04-30 2008-04-30 使い捨て吸収性物品
JP2008-119316 2008-04-30
JP2008-119317 2008-04-30
JP2008119316A JP5305725B2 (ja) 2008-04-30 2008-04-30 使い捨て吸収性物品
JP2008-143573 2008-05-30
JP2008143573A JP4579313B2 (ja) 2008-05-30 2008-05-30 使い捨て吸収性物品
JP2008-250839 2008-09-29
JP2008250839A JP4528853B2 (ja) 2008-09-29 2008-09-29 使い捨て吸収性物品

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2415436A4 (fr) * 2009-03-31 2012-11-28 Unicharm Corp Article absorbant
EP2658497A2 (fr) * 2010-12-28 2013-11-06 Kimberly-Clark Worldwide, Inc. Article absorbant avec composite de stimulation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104185463B (zh) * 2012-04-25 2016-03-23 株式会社瑞光 一次性穿戴物品及其制造方法
JP5946801B2 (ja) * 2013-07-26 2016-07-06 ユニ・チャーム株式会社 使い捨ておむつ
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