WO2016103872A1 - Matériau absorbant, et produit d'hygiène doté de matériau absorbant - Google Patents

Matériau absorbant, et produit d'hygiène doté de matériau absorbant Download PDF

Info

Publication number
WO2016103872A1
WO2016103872A1 PCT/JP2015/079525 JP2015079525W WO2016103872A1 WO 2016103872 A1 WO2016103872 A1 WO 2016103872A1 JP 2015079525 W JP2015079525 W JP 2015079525W WO 2016103872 A1 WO2016103872 A1 WO 2016103872A1
Authority
WO
WIPO (PCT)
Prior art keywords
absorbent
water
absorption
polymer particles
sap
Prior art date
Application number
PCT/JP2015/079525
Other languages
English (en)
Japanese (ja)
Inventor
大西　和彰
Original Assignee
ユニ・チャーム株式会社
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
Application filed by ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Priority to CN201580069973.3A priority Critical patent/CN107106366A/zh
Priority to KR1020177015015A priority patent/KR20170099880A/ko
Publication of WO2016103872A1 publication Critical patent/WO2016103872A1/fr

Links

Images

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
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • 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
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/531—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad
    • 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
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/60—Liquid-swellable gel-forming materials, e.g. super-absorbents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/32—Polymerisation in water-in-oil emulsions
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
    • 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
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/531—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad
    • A61F2013/5315—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad with a tissue-wrapped core
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids

Definitions

  • the present invention relates to an absorbent body and a sanitary product including the absorbent body.
  • absorbents used in sanitary products such as disposable diapers and sanitary napkins have been used by mixing or laminating water-absorbing fibers such as pulp and superabsorbent polymers (hereinafter referred to as SAP).
  • SAP superabsorbent polymers
  • the amount of SAP occupies 50% by mass or more.
  • SAP does not have not only the original liquid storage function but also the liquid transport function that water absorption fibers such as pulp do, it will reduce the absorption performance, particularly the repeated absorption performance due to the thinning of the absorber. .
  • Patent Document 1 discloses an SAP having a centrifugal retention capacity (CRC) of at least 26 g / g and a transport value (TW) of at least 15000 cm 3 s.
  • the transport value (TW) is the product of the liquid diffusion performance (SFC) and the core absorption after 60 minutes (DA 60 ) multiplied by 10 7 .
  • liquid diffusion performance SFC: Saline Flow Conductivity
  • SFC Saline Flow Conductivity
  • the hydrogel layer that has swollen and has reduced absorption capacity flows around the top and bottom and side surfaces and is absorbed in the region where the remaining absorption capacity remains.
  • a liquid acquisition diffusion layer (ADL layer) is used in combination with a liquid retention layer in which SAP is present, and an absorber structure that separates liquid acquisition and liquid retention is the mainstream. It has become.
  • the core absorption amount (DA60) is measured by measuring the absorption amount of a salt solution that is filled with 70 g of water-absorbing polymer particles with a thickness of 3 cm and flows out of the tube over 60 minutes.
  • the core absorption amount (DA60) is measured as a sufficient amount of hydrogel in a sufficient absorption time, and is an excellent method for evaluating the potential of the absorption amount of the hydrogel, but the diffusion holding force measured at a thickness of 3 cm is as described above. Similar to SFC, it is the absorption performance of a hydrogel placed in a dense state, and can be said to be a performance evaluation based on the premise of an absorber configuration in which a liquid acquisition diffusion layer (ADL layer) is used in combination to separate liquid acquisition and liquid retention.
  • ADL layer liquid acquisition diffusion layer
  • Patent Document 1 in an absorber in which SAP is densely arranged and a high-density liquid holding layer and a bulky liquid acquisition diffusion layer (ADL layer) that effectively temporarily holds the liquid are used in combination,
  • ADL layer bulky liquid acquisition diffusion layer
  • an object of the present invention is to provide an absorbent body that can be made thinner by improving the absorbent body of a sanitary product.
  • a relatively large amount of urine is temporarily stored inside and outside of the absorber compared to the region where the body pressure is applied.
  • the temporarily stored urine is (a) “absorbed urine outside the absorber” that stays outside the absorber (on the surface material), and (b) momentum excreted in the absorber, depending on the degree of binding with the water-absorbing material.
  • “Residual urine in the absorber” is urine temporarily held in a space formed between the water-absorbing materials in the absorber, and conventionally, a bulky material is disposed between the absorber and the surface material as an ADL layer.
  • the absorber becomes thick. Therefore, by optimizing the ability of SAP to absorb water and swell, swollen particle diameter (A), swelling speed (B), and efficiency of swelling (C), the storage space of “residual urine in the absorbent” can be used to swell SAP. It was found that it can be effectively generated around the swollen SAP in the thin absorbent body, and the absorption capacity can be maximized repeatedly.
  • the swollen particle diameter (A) is positively correlated with the water retention magnification. This is because SAP particles are swollen by the urine taken in by the SAP and the hydrogel particle diameter is enlarged.
  • the water retention ratio is measured as a centrifugal retention capacity (CRC).
  • the swelling rate (B) is measured as the water absorption rate of SAP, Demand Wetability (DW).
  • the DW value is measured as the rate at which physiological saline is sucked and absorbed without applying a load, and the amount of physiological saline absorbed per hour is expressed in terms of weight or volume.
  • the DW value is generally represented by a 2-minute value, a 5-minute value, or a 15-minute value as a representative value, but is further measured as a 60-minute value close to a state where the SAP is saturated, and has a positive correlation with the absorption rate.
  • the DW5 value also has a high correlation with the repetitive absorption performance, but the higher correlation is the water absorption rate in the state of hydrogelation to some extent and the late water absorption rate.
  • the later absorption rate of the SAP hydrogel becomes important since the absorption capacity of water-absorbing fibers such as pulp remains little after the absorber has repeatedly absorbed.
  • the late absorption rate of the SAP hydrogel is calculated from the time when the amount of SAP particles absorbed reaches 40 ml / g to 50 ml / g.
  • the efficiency (C) for swelling can be measured as liquid permeability.
  • As the liquid permeability there are known cases where a hydrogel in which SAP has absorbed and swelled and has reached a saturated state is measured in a non-pressurized state, and a saline flow conductivity (SFC) measured in a pressurized state.
  • the absorption of the absorber most contributes to the liquid transport in a state where the SAP hydrogel swollen to the maximum under pressure corresponding to the body pressure of the baby is decompressed and placed in a slightly pressurized state, that is, at the time of slightly pressurized Liquid permeability (slightly pressurized SFC).
  • slightly pressurized Liquid permeability lightly pressurized SFC
  • the water retention ratio of SAP, the absorption rate (DW 5-minute value, late absorption rate), and liquid permeability (slightly pressurized SFC) are important. .
  • the present invention that has solved the above problems is an absorbent body comprising a highly water-absorbing polymer particle, an absorbent core containing a water-absorbing fiber, and a sheet member that encloses the absorbent core.
  • Magnification is 37 g / g or more
  • DW5 minute value is 40 ml / g or more when the superabsorbent polymer particles are aspirated by contact with physiological saline for 5 minutes with no load
  • DW value of superabsorbent polymer particles The late absorption rate calculated from the time it takes to reach 50 ml / g from 40 ml / g is 6 ml / g ⁇ min or more
  • the slightly pressurized SFC that is the liquid diffusion performance under slightly pressurized is 5 ⁇ 10 ⁇ 6 ⁇ ml ⁇ second.
  • the repeated absorbency index defined by the ratio of water retention ⁇ late-term absorption rate ⁇ slightly pressurized SFC ⁇ 10 3 is 2 or more.
  • an SAP that exhibits a specific absorption behavior and a water-absorbing fiber are combined, and an absorbent body that can be thinned and has excellent repetitive absorption performance, and a sanitary article including the absorbent body are provided.
  • the drawings illustrate specific embodiments of the invention and include selective and preferred embodiments as well as the essential features of the invention.
  • rupture perspective view which represents typically the absorber which concerns on this invention.
  • the following embodiments relate to the absorbent body of the present invention and a sanitary article including the absorbent body, and include not only an indispensable structure of the invention but also a selective and preferable structure.
  • the absorbent body 1 includes an absorbent core 4 including SAP (high water-absorbing polymer) particles 2 and water-absorbing fibers 3, and a sheet member 5 that covers the absorbent core 4.
  • SAP particles 2 contained in the absorbent body 1 are preferably 50 to 100% by mass, and the water absorbent fibers 3 are preferably 0 to 50% by mass.
  • Cellulose fibers, preferably pulp, can be used for the water absorbent fibers 3.
  • the SAP particles 2 are particles of a crosslinked polyacrylic acid sodium salt, and details of the SAP particles 2 according to the present invention will be described later.
  • a liquid-permeable sheet is used as the sheet member 5 that covers the absorbent core 4, and a liquid-permeable sheet can be arbitrarily combined with the liquid-permeable sheet.
  • the entire absorbent core 4 can be encapsulated with a liquid-permeable sheet alone.
  • the absorption core 4 can also be hold
  • the liquid-permeable sheet is disposed on the skin facing surface side facing the skin of the user of the absorber, and the liquid-impermeable sheet is disposed on the non-skin facing surface side facing the skin facing surface.
  • water permeable sheets include, but are not limited to, non-woven fabrics, tissue paper, and films having a large number of micropores.
  • liquid-impervious sheets include, but are not limited to, resin films and water-repellent nonwoven fabrics.
  • the SAP particles 2 used in the absorber 1 of the present invention satisfy any or all of the following conditions.
  • the water retention ratio of the SAP particles 2 is 37 g / g or more, preferably 39 g / g or more.
  • the DW5 value of SAP particles 2 is 40 ml / g or more, preferably 50 ml / g or more, more preferably more than 60 ml / g.
  • the late absorption rate calculated from the time when the amount of absorption of the SAP particles 2 in the DW method reaches from 40 ml / g to 50 ml / g is 6 ml / g ⁇ min, preferably 7 ml / g ⁇ min or more, preferably It is 10 ml / g ⁇ min or more, preferably 14 ml / g ⁇ min or more.
  • the slightly pressurized SFC which is the liquid diffusion performance under slightly pressurized, is 5 ⁇ 10 ⁇ 6 ⁇ ml ⁇ second or more, preferably 7 ⁇ 10 ⁇ 6 ⁇ ml ⁇ second or more.
  • the amount of particles having a particle size of less than 300 ⁇ m in the SAP particles 2 is preferably 10% by mass or less, more preferably 9% by mass or less, more preferably 8% by mass or less, more preferably 7% by mass or less, and more. Preferably it is 6 mass% or less.
  • the amount of the SAP particles 2 in the absorbent core 4 is 50 to 100% by mass, preferably 50 to 90% by mass, more preferably 50 to 80% by mass, more preferably 50 to 70% by mass, and more preferably. 50 to 65% by mass.
  • components other than the SAP particles 2 in the absorbent core 4 are water absorbent fibers.
  • grains 2 Preferably it is 1000 micrometers or less, More preferably, it is 900 micrometers or less, More preferably, it is 800 micrometers or less.
  • the SAP particles 2 used in the present invention are not particularly limited as long as the above conditions are satisfied.
  • one or both of the SAP particles 2 obtained by the following two methods can be used.
  • an azo radical polymerization initiator having a small self-crosslinking reaction is used as the radical polymerization initiator in the polymerization crosslinking reaction of the acrylic acid polymer, and chain transfer is initiated during the polymerization reaction.
  • the SAP particles 2 used in the present invention can be obtained by adding and reacting an agent.
  • the polymerization method described in Japanese Patent No. 5162634 can be used.
  • the reverse phase suspension polymerization method is desirable from the viewpoint that precise polymerization reaction control and a wide range of particle diameters can be controlled.
  • the polymerization method described in Japanese Patent No. 4969778 can be used.
  • a two- to three-stage reversed-phase suspension polymerization is performed using a water-soluble azo radical polymerization initiator in the presence of a polyvalent glycidyl compound as an internal cross-linking agent, and then the resulting water-absorbent resin is subjected to a post-treatment.
  • SAP particles 2 obtained by post-crosslinking with a cross-linking agent and having a higher cross-linking density in the vicinity of the surface than the inside are used.
  • the obtained SAP particles 2 have a high water retention capacity, a high absorption capacity under load, an excellent absorption rate, and a low water-soluble content.
  • the relational expression “Repeated Absorption Index” Water Retention Ratio ⁇ Late Absorption Rate ⁇ SFC ⁇ 10 3 under Slight Pressurization is deductively captured, and a water-absorbing polymer having a high pressureless DW (Comparative Example 5).
  • the SAP particles 2 used in the present invention can be obtained by cutting a portion having a small particle diameter in (see). The portion having a small particle size contributes to the absorption rate, but the liquid permeability is lowered, and the repeated absorbency index does not increase.
  • the liquid permeability is improved without lowering the non-pressurized DW, and the “late absorption rate” and “repeated absorption index” are improved. It is possible to make it. Moreover, since the internal cross-linking ratio of the water-absorbing polymer is increased by cutting the small particle diameter portion, the water retention ratio can be improved.
  • the DW measuring apparatus used for the measurement was Demand Wettability Tester manufactured by Scientific Machine & Supplies Co. LTD, and the 250 mesh nylon mesh was N-NO.250HD manufactured by NBC Industries.
  • a piston (mass 30 g) having an outer diameter of 25 mm with a 250 mesh nylon mesh pasted on the bottom surface was inserted into the cylinder. Thereafter, the bottom surface of the cylinder into which the piston was inserted was placed on a spacer having a height of 2 mm set in a petri dish storing physiological saline, and water was absorbed for 30 minutes. Next, the cylinder was removed from the physiological saline, and a 200 g weight was placed on the piston and allowed to stand for 3 minutes. Thereafter, the weight and the piston were removed from the cylinder, the inside of the cylinder was filled with physiological saline, and the amount of liquid permeated for 1 minute was weighed to obtain a liquid passing speed F under a slight load. The slightly pressurized SFC was obtained from the following formula. The thickness L 0 of the Gel layer was determined by measuring the SAP thickness after swelling with a ruler.
  • SAP particles were evaluated by sieving SAP particles using a sieve specified in JIS Z 8801 and measuring the mass of the sample remaining on each sieve.
  • the sieve openings used were 850 ⁇ m, 710 ⁇ m, 600 ⁇ m, 500 ⁇ m, 355 ⁇ m, 300 ⁇ m, 250 ⁇ m, and 150 ⁇ m.
  • Pulp (Weyerhaueser, NB416) slit to 5 cm width was supplied to a pulp crusher (Kamas Cell-mill) and pulverized.
  • an SMS nonwoven fabric made of PP fibers was laid on a wire net affixed on a suction box, and a wooden frame was placed thereon, and the pulverized pulp was fed for a predetermined time T for a predetermined basis weight.
  • a screw feeder spray tube for supplying SAP particles was inserted between the pulp crusher and the suction box, and the rotation speed and supply time were set so as to obtain a predetermined basis weight during lamination.
  • the SAP was supplied 1/4 ⁇ T seconds after the pulp was supplied, and a pulp skin layer containing no SAP was formed. Then, while dispersing SAP for 1/2 ⁇ T seconds, the mixture was fed into the air flow of pulverized pulp to form a 1 / 2-thick SAP blend layer of the laminate.
  • An SMS nonwoven fabric was placed on the pulp / SAP laminate, and was pressed with a hydraulic press machine to a predetermined thickness, and the absorber was cut into a width of 120 mm and a length of 350 mm.
  • a 16 g / m 2 tissue (width 120 mm) coated with a hot melt adhesive in a spiral shape is adhered to the upper surface of the SAP blend layer, and further, the hot melt adhesive is adhered to the lower surface.
  • a 16 g / m 2 tissue (width 150 mm) coated with the agent in a spiral shape was adhered.
  • both sides of the tissue having a lower width of 150 mm were folded back by 15 mm so that the width of the absorbent body 1 was 120 mm, and the front and rear ends were cut to a length of 350 mm.
  • the thickness of the obtained absorbent body 1 was 2.4 mm.
  • the absorbent body 1 having an SAP content of 65% by mass (SAP basis weight 300 g / m 2 , pulp basis weight 160 g / m 2 ) and an SAP content of 55% by mass (SAP basis weight 280 g / m 2 , pulp basis weight) 230 g / m 2 ) absorber 1 was prepared.
  • a hydrophilic through-air nonwoven fabric in which a PE film coated with a hot melt adhesive in a spiral shape is bonded to the upper surface of the absorbent body 1 and a hot melt adhesive is coated in a spiral shape on the lower surface of the absorbent body 1 Were bonded to prepare a simple diaper (width 190 mm, length 400 mm) for repeated absorption performance evaluation.
  • Table 1 shows the results of repeated absorption performance evaluation of simple diapers prepared using the SAP particles 2 obtained by the first method described above.
  • Example 1 As shown in Table 1, only the SAP particles of Example 1 having a repetitive absorption index of 2 or more are U-shaped regardless of whether the SAP content in the absorber 1 is 55% by mass or 65% by mass.
  • the fourth absorption rate was 60 seconds or less. This indicates that the ability to rapidly absorb 80 ml of artificial urine is maintained even when the SAP content is increased. Therefore, the absorber 1 can be thinned.
  • Table 2 shows the results of repeated absorption performance evaluation of simple diapers prepared using the SAP particles 2 obtained by the second method described above.
  • the amount of particles having a particle diameter of less than 300 ⁇ m contained in the SAP particles 2 is 10% by mass or less, preferably 9% by mass or less, more preferably 8% by mass or less, more preferably 7% by mass or less. More preferably 6% by mass or less, DW5 value is 50 ml / g or more, preferably more than 60 ml / g, and late absorption rate is 6 ml / g ⁇ min or more. In both cases where the SAP content was 55 mass% and 65 mass%, the fourth U-shaped absorption rate was 60 seconds or less. This indicates that the ability to rapidly absorb 80 ml of artificial urine is maintained even when the SAP content is increased. Therefore, the absorber 1 can be thinned.
  • the repeated absorption performance of the absorber 1 is maintained by reducing the amount of particles having a particle diameter of less than 300 ⁇ m in the SAP particles 2.
  • the SAP particles 2 having a particle diameter of less than 300 ⁇ m have a large surface area to volume ratio, and thus have a low absorption performance but a high absorption rate. Therefore, the amount of particles having a particle diameter of less than 300 ⁇ m in the SAP particles disposed on the skin-facing surface side of the absorbent body 1 is set to 10 mass% or less, and the particle diameter of the SAP particles 2 is increased from the skin-facing surface toward the non-facing surface. Is reduced, the absorbent body 1 having both high repetitive absorption performance and high absorption speed can be obtained.
  • Such an absorbent body 1 is, for example, sieved the SAP particles using a sieve having an opening of 300 ⁇ m, and placed the SAP particles 2 that did not pass through the sieve on the skin facing surface side of the absorbent body 1 and passed through the sieve. It is obtained by arranging the SAP particles 2 on the non-skin facing surface side.
  • the absorbent body 1 of the present invention can be used for all sanitary products using the absorbent body 1 containing SAP.
  • sanitary products include, but are not limited to, known disposable diapers, sanitary napkins, incontinence pads, and breast milk pads.
  • An absorbent body comprising a highly water-absorbing polymer particle, an absorbent core containing a water-absorbing fiber, and a sheet member covering the absorbent core, wherein the water-absorbing polymer particle has a water retention ratio of 37 g / g or more, Calculated from the time it takes for the water absorption polymer particles to absorb from 40 ml / g to 50 ml / g when the DW5 minute value, which is the absorption amount when the water-soluble polymer particles are immersed in physiological saline for 5 minutes, is 40 ml / g or more.
  • Late absorption rate is 6 ml / g ⁇ min or more
  • liquid pressurization SFC is 5 ⁇ 10 ⁇ 6 ⁇ ml ⁇ second or more
  • the repeated absorbency index defined by 10 3 is 2 or more.
  • the present invention disclosed in paragraph 0034 can include at least the following embodiments.
  • the embodiments can be adopted separately or in combination with each other.
  • the water retention ratio is 39 g / g or more.
  • the DW5 minute value is 50 ml / g or more.
  • Late absorption rate is 7 ml / g ⁇ min or more.
  • the slightly pressurized SFC is 7 ⁇ 10 ⁇ 6 ⁇ ml ⁇ second or more.
  • the absorbent body contains 50 to 100% by mass of superabsorbent polymer particles and 0 to 50% by mass of water absorbent fibers.
  • the amount of particles having a particle diameter of less than 300 ⁇ m contained in the superabsorbent polymer particles is 10% by mass or less.
  • the absorbent body has a skin facing surface facing the user's skin and a non-skin facing surface facing the skin facing surface, and the particle diameter in the superabsorbent polymer particles located on the skin facing surface side is 300 ⁇ m. The amount of particles less than 10% by mass is less and the particle diameter of the superabsorbent polymer particles decreases from the skin facing surface toward the non-facing surface.
  • a sanitary article comprising the absorbent body of the present invention.
  • the present invention can include the following embodiments.
  • the embodiments can be adopted separately or in combination with each other.
  • An absorbent body comprising a superabsorbent polymer particle, an absorbent core containing a water absorbent fiber, and a sheet member covering the absorbent core, wherein the superabsorbent polymer particle is placed in physiological saline for 5 minutes.
  • the DW5 value which is the amount absorbed when immersed, is 50 ml / g or more, preferably greater than 60 ml / g, and is calculated from the time taken for the amount of absorption of the superabsorbent polymer particles to reach 50 ml / g from 40 ml / g.
  • Late absorption rate is 6 ml / g ⁇ min or more, preferably 14 ml / g ⁇ min or more, preferably 16 ml / g ⁇ min or more, and the amount of particles having a particle diameter of less than 300 ⁇ m in the superabsorbent polymer particles is 10 mass % Or less, more preferably 9% by mass or less, more preferably 8% by mass or less, more preferably 7% by mass or less, and more preferably 6% by mass or less.
  • the absorbent body contains 50 to 100% by mass of superabsorbent polymer particles and 0 to 50% by mass of water absorbent fibers.
  • the absorbent body has a skin facing surface facing the user's skin and a non-skin facing surface facing the skin facing surface, and the particle diameter in the superabsorbent polymer particles located on the skin facing surface side is 300 ⁇ m. The amount of the particles less than 10% by mass is less and the particle diameter of the superabsorbent polymer particles decreases from the skin facing surface toward the non-facing surface.
  • a sanitary article comprising the absorbent body of the present invention.

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Epidemiology (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Materials Engineering (AREA)
  • Hematology (AREA)
  • Dispersion Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

La présente invention concerne l'amélioration d'un matériau absorbant pour des produits d'hygiène et la fourniture d'un matériau absorbant qui peut être aminci. L'invention porte en particulier sur un matériau absorbant (1) comprenant une partie centrale absorbante (4) qui contient des particules de polymère à haute capacité d'absorption d'eau (2) et des fibres absorbant l'eau (3) et un élément en feuille (5) qui entoure la partie centrale absorbante. Dans ledit matériau absorbant, la capacité de rétention d'eau des particules de polymère à haute capacité d'absorption d'eau est de 37 g/g ou plus ; la valeur DW 5 min., qui est une quantité d'absorption obtenue lorsque les particules de polymère à haute capacité d'absorption d'eau sont immergées dans une solution saline physiologique pendant 5 minutes, est de 40 ml/g ou plus ; la vitesse d'absorption tardive d'eau, qui est calculée à partir d'un temps nécessaire pour faire passer la quantité d'absorption dans les particules de polymère à haute capacité d'absorption d'eau de 40 ml/g à 50 ml/g, est de 6 ml/g /min ou plus ; la SFC dans des conditions légèrement sous pression, qui est une mesure de performance de diffusion de liquide dans des conditions légèrement sous pression, est de 5 × 10-6/ml/s ou plus ; et l'indice de puissance d'absorption répétée, qui est défini par "(la capacité de rétention d'eau) × (la vitesse tardive d'absorption) × (SFC dans des conditions légèrement sous pression" × 103), est 2 ou plus.
PCT/JP2015/079525 2014-12-25 2015-10-20 Matériau absorbant, et produit d'hygiène doté de matériau absorbant WO2016103872A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201580069973.3A CN107106366A (zh) 2014-12-25 2015-10-20 吸收体及具备吸收体的卫生用品
KR1020177015015A KR20170099880A (ko) 2014-12-25 2015-10-20 흡수체 및 흡수체를 구비하는 위생 용품

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-262122 2014-12-25
JP2014262122A JP2016120083A (ja) 2014-12-25 2014-12-25 吸収体及び吸収体を備える衛生用品

Publications (1)

Publication Number Publication Date
WO2016103872A1 true WO2016103872A1 (fr) 2016-06-30

Family

ID=56149909

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/079525 WO2016103872A1 (fr) 2014-12-25 2015-10-20 Matériau absorbant, et produit d'hygiène doté de matériau absorbant

Country Status (5)

Country Link
JP (1) JP2016120083A (fr)
KR (1) KR20170099880A (fr)
CN (1) CN107106366A (fr)
TW (1) TW201628580A (fr)
WO (1) WO2016103872A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018155591A1 (fr) 2017-02-22 2018-08-30 株式会社日本触媒 Feuille absorbant l'eau, feuille allongée absorbant l'eau, et article absorbant

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019039916A1 (fr) 2017-08-25 2019-02-28 주식회사 엘지화학 Dispositif d'évaluation sap
EP3896118A4 (fr) * 2018-12-12 2023-01-11 Sumitomo Seika Chemicals Co., Ltd. Particules de résine absorbantes, corps absorbant, article absorbant, et procédé de mesure de puissance d'absorption de liquide
WO2020217825A1 (fr) 2019-04-26 2020-10-29 ユニ・チャーム株式会社 Procédé de disposition de fluide pour un article absorbant et article absorbant
JP7467115B2 (ja) * 2019-12-27 2024-04-15 ユニ・チャーム株式会社 吸収性物品

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008132056A (ja) * 2006-11-27 2008-06-12 Kao Corp 吸収性物品
JP4969778B2 (ja) * 2004-12-21 2012-07-04 住友精化株式会社 吸水性樹脂粒子の製造方法及びそれを用いた衛生材料
WO2012108253A1 (fr) * 2011-02-08 2012-08-16 住友精化株式会社 Procédé de fabrication de résine absorbant l'eau
JP5162634B2 (ja) * 2003-06-13 2013-03-13 住友精化株式会社 吸水性樹脂の製造方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3447951B2 (ja) * 1998-04-09 2003-09-16 ユニ・チャーム株式会社 使い捨ての体液吸収性物品
JP4738101B2 (ja) * 2005-08-29 2011-08-03 花王株式会社 吸収性シート
JP2007167193A (ja) * 2005-12-20 2007-07-05 Kao Corp 吸収性シート及びそれを用いた吸収性物品

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5162634B2 (ja) * 2003-06-13 2013-03-13 住友精化株式会社 吸水性樹脂の製造方法
JP4969778B2 (ja) * 2004-12-21 2012-07-04 住友精化株式会社 吸水性樹脂粒子の製造方法及びそれを用いた衛生材料
JP2008132056A (ja) * 2006-11-27 2008-06-12 Kao Corp 吸収性物品
WO2012108253A1 (fr) * 2011-02-08 2012-08-16 住友精化株式会社 Procédé de fabrication de résine absorbant l'eau

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018155591A1 (fr) 2017-02-22 2018-08-30 株式会社日本触媒 Feuille absorbant l'eau, feuille allongée absorbant l'eau, et article absorbant

Also Published As

Publication number Publication date
KR20170099880A (ko) 2017-09-01
CN107106366A (zh) 2017-08-29
TW201628580A (zh) 2016-08-16
JP2016120083A (ja) 2016-07-07

Similar Documents

Publication Publication Date Title
US11944526B2 (en) Absorbent cores having material free areas
RU2625434C2 (ru) Единые абсорбирующие структуры, содержащие сердцевину абсорбента и/или слой поглощения и распределения для абсорбирующих изделий
WO2016103872A1 (fr) Matériau absorbant, et produit d'hygiène doté de matériau absorbant
CA2894680C (fr) Article absorbant pourvu d'un systeme profile d'acquisition-repartition
JP4637828B2 (ja) 吸収構造体を含む吸収物品
TWI231761B (en) Superabsorbent-containing composites
EP2740450A1 (fr) C'ur absorbant à haute teneur en matériau superabsorbant
CN103619291A (zh) 具有改善的吸收性能的吸收制品
EP3205318A1 (fr) Article absorbant à forte capacité absorbante
JP2024119947A (ja) 嵩高中心層及び超吸収性粒子を含む吸収性コア
US11877917B2 (en) Absorbent core having swelling chamber
US20170156947A1 (en) Absorbent Article with Improved Core
JPWO2005082305A1 (ja) 吸収体、この吸収体を備えたおむつ及び吸収性物品
JP2007143676A (ja) 拡散性に優れた体液吸収物品
JP2013530795A (ja) 吸収性コア
JP6181068B2 (ja) 流体流れ制御部材を有する吸収性物品
JP4266685B2 (ja) 体液吸収性物品
GB2573994A (en) Liquid absorbent system comprising intermediate and ultimate storage member
JP4868832B2 (ja) 体液吸収物品
JP4841196B2 (ja) 使い捨て体液吸収物品
JP4758174B2 (ja) 使い捨て体液吸収物品
EP3278782A1 (fr) Article absorbant avec stockage de fluide amélioré
JP2001309940A (ja) 薄型吸収体および薄型吸収性物品並びにその製造方法
JP4840905B2 (ja) 使い捨て体液吸収物品
EP3251648A1 (fr) Article absorbant avec distribution de fluide améliorée

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15872441

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 20177015015

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15872441

Country of ref document: EP

Kind code of ref document: A1