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WO2012132644A1 - Article absorbant - Google Patents

Article absorbant Download PDF

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Publication number
WO2012132644A1
WO2012132644A1 PCT/JP2012/054154 JP2012054154W WO2012132644A1 WO 2012132644 A1 WO2012132644 A1 WO 2012132644A1 JP 2012054154 W JP2012054154 W JP 2012054154W WO 2012132644 A1 WO2012132644 A1 WO 2012132644A1
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WO
WIPO (PCT)
Prior art keywords
tow
absorbent article
web
liquid
fibers
Prior art date
Application number
PCT/JP2012/054154
Other languages
English (en)
Japanese (ja)
Inventor
中下　将志
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
Publication of WO2012132644A1 publication Critical patent/WO2012132644A1/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
    • A61F13/53—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
    • A61F13/532—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 inhomogeneous in the plane of the pad
    • A61F13/533—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 inhomogeneous in the plane of the pad having discontinuous areas of compression
    • 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
    • A61F13/534—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 an inhomogeneous composition through the thickness of the pad
    • A61F13/537—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • A61F13/53708—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having a promotional function on liquid propagation in at least one direction
    • 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
    • A61F13/534—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 an inhomogeneous composition through the thickness of the pad
    • A61F13/537—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • A61F13/53743—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterised by the position of the layer relative to the other layers
    • A61F13/53752—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterised by the position of the layer relative to the other layers the layer is embedded in the absorbent core
    • 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
    • A61F13/534—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 an inhomogeneous composition through the thickness of the pad
    • A61F13/537—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • A61F13/5376—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterised by the performance of the layer, e.g. acquisition rate, distribution time, transfer time

Definitions

  • This disclosure relates to an absorbent article that includes a web of tows.
  • tow for absorbent articles. Since the tow has the same fiber direction, it is expected that the absorbed liquid can be quickly diffused when it is used in an absorbent article. However, the tow is bulky and has many interstices between fibers, and can quickly diffuse the absorbed liquid, but after absorbing the liquid, it crushes and its thickness decreases, resulting in a decrease in liquid permeability. It has a drawback that is easy to do. Therefore, various studies have been conducted to improve the defect.
  • Patent Document 1 discloses an absorbent body including a fiber assembly made of tows composed of fibers, in which the contact portion between fibers is bonded or melted by a line or a point by applying a binder. An absorber is described which is characterized in that it is worn. Patent Document 1 aims to maintain the liquid permeability by adhering tow fibers with a binder to retain the shape even after absorbing the liquid.
  • Patent Document 2 discloses an absorbent article including an absorbent body including a web of hydrophilic long fibers, wherein the web has a network structure in which the intersections of the long fibers are combined.
  • An absorbent article in which a superabsorbent polymer is embedded and supported in the network structure, and the bonded state of the long fibers is weakened or released by the web becoming wet is described.
  • the absorbent article described in Patent Document 2 is designed such that the intersection is formed by a water-soluble adhesive, and when the liquid is absorbed, the water-soluble adhesive dissolves and the intersection disappears.
  • an object of the present disclosure is to provide an absorbent article including a web made of a tow that has excellent liquid diffusibility and is difficult to deform after absorbing the liquid and retains the liquid diffusibility.
  • a liquid-permeable top sheet, a liquid-impermeable back sheet, the liquid-permeable top sheet, and a liquid-impermeable back sheet An absorbent article, wherein the absorbent article comprises a web of tows, the web of tows comprising a plurality of ridges along the toe fiber orientation direction, and An absorbent article having a plurality of groove portions and a ridge groove surface, wherein the web made of the tow has a plurality of entanglement points formed by entanglement of the fibers of the tow.
  • the present inventors have found that the above problems can be solved.
  • the web made of tow contained in the absorbent article of the present disclosure is excellent in liquid diffusibility, is not easily deformed after absorbing the liquid, and retains the liquid diffusibility.
  • FIG. 1 is a perspective view of a web of tows according to the present disclosure.
  • FIG. 2 is a diagram illustrating an example of an absorbent article according to the present disclosure.
  • FIG. 3 is a cross-sectional view of one embodiment of an absorbent article of the present disclosure.
  • FIG. 4 is a cross-sectional view of one embodiment of an absorbent article of the present disclosure.
  • FIG. 5 is an enlarged view of a groove surface of a web made of tow.
  • FIG. 6 is a cross-sectional view of one embodiment of an absorbent article of the present disclosure.
  • FIG. 7 is a cross-sectional view of one embodiment of an absorbent article of the present disclosure.
  • FIG. 8 is a diagram showing an example of a method for forming a web made of tow.
  • FIG. 9 is a photograph of the web made of tow produced in Example 1 taken with the ridges in front.
  • FIG. 10 is a photograph of the toe web produced in Example 1 taken from the cross-section
  • FIG. 1 is a perspective view of a web of tows according to the present disclosure.
  • the web 1 made of tow shown in FIG. 1 has a ridge groove surface 6 including a plurality of ridge portions 2 and a plurality of groove portions 3 along the orientation direction O of the fibers of the tow.
  • the web 1 made of tow shown in FIG. 1 has a plurality of entanglement points 5 formed by entanglement of tow fibers 4 with each other.
  • the orientation direction of the tow fibers is not particularly limited.
  • the tow fibers are composed of, for example, tow.
  • the superabsorbent polymer is difficult to move, the distribution of the superabsorbent polymer is less likely to be biased, and the user is less likely to feel discomfort when the liquid is absorbed.
  • the absorbed liquid can be quickly moved in the longitudinal direction of the absorbent article.
  • the absorption speed can be increased, leakage can be reduced, and the groove portion is a starting point of bending, so that the absorbent body is flexible and easily fits the body.
  • the liquid absorbed by the web made of tow quickly diffuses through the gaps between the substantially parallel tow fibers by capillary action.
  • the absorbed liquid can be received in a wide range of the absorber, so that it is difficult to leak, the thickness of the absorber can be reduced, and the amount of superabsorbent polymer can be reduced.
  • the amount of fibers in the heel part 2 is larger than the amount of fibers in the groove part 3.
  • the “amount of fiber” related to the heel portion and the groove portion means the mass of the fiber existing in the thickness direction based on the unit area in the plane direction of the web made of tow.
  • the amount of fibers in the heel portion is larger than the amount of fibers in the groove portion, so that the compression rate is excellent, and even when body pressure is applied, the absorption rate is unlikely to decrease, Leakage during long-time use can be reduced.
  • the “entanglement point” formed by the entanglement of tow fibers is that at least two tow fibers are in contact with each other, and the direction of at least one tow fiber is changed at those contact points. It means the part that is.
  • the web made of tow according to the present disclosure has a plurality of the entanglement points, but the entanglement points are formed by entanglement of fibers and are not fixed by an adhesive or the like. Therefore, when the web made of tow is included in the absorbent body containing the superabsorbent polymer, the web made of tow can follow the swelling of the superabsorbent polymer, but the absorbent body is deformed. Can also be suppressed. Further, even when the user moves violently, the shape of the absorbent article can be maintained to some extent. Furthermore, since no water-soluble adhesive is used to form the entanglement point, the absorption inhibition of the superabsorbent polymer is unlikely to occur. In the absorbent article of the present disclosure, the web of tow can be free of adhesive.
  • FIG. 2 shows an open-type disposable diaper.
  • the absorbent article 7 shown in FIG. 2 includes a liquid-permeable top sheet 8, a liquid-impermeable back sheet (not shown), a liquid-permeable top sheet 8 and a liquid-impermeable back sheet. And a leak barrier 9 and a tape fastener 10 are further included.
  • FIG. 3 is a cross-sectional view of one embodiment of the absorbent article of the present disclosure, and corresponds to the XX cross-section of FIG.
  • the absorbent article 7 shown in FIG. 3 includes a liquid-permeable top sheet 8, a liquid-impermeable back sheet 12, and absorption between the liquid-permeable top sheet 8 and the liquid-impermeable back sheet 12.
  • the absorbent body 11 includes a web 1 made of tow.
  • the web 1 made of tow has a ridge groove surface 6 including a plurality of ridge portions 2 and a plurality of groove portions 3 along the orientation direction of the fibers of the tow, And it has the entanglement point formed when the fibers of tow are entangled. Further, in the absorbent article 7 shown in FIG. 3, the web 1 made of tow is arranged so that the orientation direction of the fibers of the tow coincides with the longitudinal direction of the absorbent article 7.
  • FIG. 4 is a cross-sectional view of one embodiment of the absorbent article of the present disclosure, and corresponds to the XX cross-section of FIG.
  • the absorbent article 7 shown in FIG. 4 includes a liquid-permeable top sheet 8, a liquid-impermeable back sheet 12, and absorption between the liquid-permeable top sheet 8 and the liquid-impermeable back sheet 12.
  • the body 11 is included, and the absorbent body 11 includes a laminate in which two layers of webs 1 made of tow are laminated.
  • the web 1 made of tow has a plurality of ridges 2 and a plurality of grooves 3 along the orientation direction of the fibers of the tow.
  • the web 1 made of tow is arranged so that the orientation direction of the fibers of the tow coincides with the longitudinal direction of the absorbent article 7 in both layers.
  • the absorbent body may further include a superabsorbent polymer.
  • the superabsorbent polymer is made up of a web made of tow. It is preferable that there are more in the groove portion than in the portion. Due to the presence of the superabsorbent polymer in the groove, the superabsorbent polymer is less likely to move, the distribution of the superabsorbent polymer is less likely to be biased, and the absorbent article is relatively uniform when absorbing liquid. Because it is easy to swell, it is difficult for the user to feel uncomfortable.
  • the ends in the orientation direction of the tow fibers are coincident with the ends of the fibers, so that a superabsorbent polymer is dispersed on the web made of tows.
  • the absolute amount of the groove portion that is easy to hold the superabsorbent polymer is increased, and a larger amount of the absorbent is obtained.
  • the tow web is preferably laminated in two or more layers, and three or more layers are laminated. More preferably.
  • FIG. 5 is an enlarged view of a groove surface of a web made of tow.
  • the amount of the superabsorbent polymer 13 present in the heel part 2 is smaller than the amount of the superabsorbent polymer 13 present in the groove part 3, and expanded after absorbing the liquid.
  • the superabsorbent polymer 13 is less likely to inhibit further liquid permeation.
  • a superabsorbent polymer 13 may be present inside the web 1 made of tow.
  • the absorbent article according to the present disclosure includes, for example, an embodiment in which the absorbent body includes a web composed of three or more layers of tows, an embodiment in which the absorbent body includes a web composed of tri-folded tows, and the like. include.
  • the absorbent body contains a superabsorbent polymer
  • the web made of tow and the superabsorbent polymer can be covered with a core wrap.
  • the web made of tow is arranged so that the orientation direction of the fibers of the tow and the longitudinal direction of the absorbent article coincide with each other.
  • the fiber orientation of the absorbent article may not coincide with the longitudinal direction of the absorbent article.
  • the fiber orientation direction of the tow may be arranged so as to coincide with the direction orthogonal to the longitudinal direction of the absorbent article. .
  • the absorbent body when the absorbent body includes a web composed of two layers of tows, one layer is disposed so that the orientation direction of the fibers of the tow coincides with the longitudinal direction of the absorbent article. Then, the remaining one layer can be arranged so that the orientation direction of the tow fibers and the direction perpendicular to the longitudinal direction of the absorbent article coincide.
  • the web made of tow can rapidly diffuse the liquid absorbed in the orientation direction of the tow fibers, the direction in which the absorbed liquid is desired to diffuse and the orientation direction of the tow fibers Should be matched.
  • the absorbent body is, for example, a web of tow placed on a tissue, on which a superabsorbent polymer is spread, for example about 80 g / m 2 , and then a web of tow and a superabsorbent Laminate a polymer (about 80 g / m 2 ), then a web of tow and a superabsorbent polymer (about 80 g / m 2 ), a tissue on it, and then press It is formed by compression with a machine, for example, compression for 5 seconds at a pressure of 35 kg / cm 2 .
  • the basis weight thereof varies depending on the number of laminated layers, the specific application, etc. For example, the basis weight of about 10 to about 1000 g / m 2 , about 100 It can have a basis weight of about 500 g / m 2 .
  • the groove surface may face either the user side or the underwear side, but from the viewpoint of holding the superabsorbent polymer, the liquid is made from fiber.
  • the absorbed liquid can be quickly absorbed by the large amount of the groin and then the absorbed liquid can be transferred to the orientation direction of the tow fibers and the groove of the highly absorbent polymer, the grooving surface faces the user side It is preferable.
  • the liquid absorbed by the absorbent body can be quickly diffused in a wide range, particularly in the orientation direction of the tow fibers, and absorbed without causing leakage.
  • FIG. 6 is a cross-sectional view of one embodiment of the absorbent article of the present disclosure, and corresponds to the XX cross-section of FIG.
  • the absorbent article 7 shown in FIG. 6 includes a liquid-permeable top sheet 8, a liquid-impermeable back sheet 12, and absorption between the liquid-permeable top sheet 8 and the liquid-impermeable back sheet 12.
  • the second sheet 14 is further formed between the liquid permeable top sheet 8 and the absorbent body 11, and the second sheet 14 is formed from the web 1 made of tow.
  • the web 1 made of tow has a ridge groove surface 6 including a plurality of ridge portions 2 and a plurality of groove portions 3 along the orientation direction of the fibers of the tow, And it has a plurality of entanglement points formed by entanglement of tow fibers.
  • the web 1 made of tow is arranged so that the orientation direction of the fibers of the tow and the longitudinal direction of the absorbent article 7 coincide.
  • the tow web When the tow web is arranged as a second sheet present between the liquid permeable topsheet and the absorbent body, it preferably has a basis weight of about 10 to about 100 g / m 2 , and More preferably, it has a basis weight of about 20 to about 50 g / m 2 .
  • the groove surface may face either the user side or the underwear side, but the liquid present in the top sheet is made up of the amount of fibers. It is preferable that the ridge surface is directed to the user side from the viewpoint that it can be absorbed quickly by capillary action at a large number of ridges, and then the absorbed liquid can be transferred to the orientation direction of the tow fibers.
  • the second sheet By forming the second sheet from a web made of tow, before the absorbed liquid is transferred to the absorbent body, it is quickly diffused in a wide area, in particular, in the orientation direction of the tow fibers, without causing leakage. Can be absorbed by an absorber.
  • FIG. 7 is a cross-sectional view of one embodiment of the absorbent article of the present disclosure, and corresponds to the XX cross-section of FIG.
  • the absorbent article 7 shown in FIG. 7 includes a liquid-permeable top sheet 8, a liquid-impermeable back sheet 12, and absorption between the liquid-permeable top sheet 8 and the liquid-impermeable back sheet 12.
  • a third sheet 15 is formed between the absorbent body 11 and the liquid-impermeable back sheet 12, and the third sheet 15 is formed from a web 1 made of tow.
  • the web 1 made of tow has a ridge groove surface 6 including a plurality of ridge portions 2 and a plurality of groove portions 3 along the orientation direction of the fibers of the tow, And it has the entanglement point formed when the fibers of tow are entangled. Further, in the absorbent article 7 shown in FIG. 7, the web 1 made of tow is arranged so that the orientation direction of the fibers of the tow coincides with the longitudinal direction of the absorbent article 7.
  • the web made of tow disposed between the absorber and the liquid-impermeable back sheet may be referred to as a “third sheet” for the sake of convenience.
  • the towed web When the towed web is disposed as a third sheet present between the absorbent and the liquid-impermeable backsheet, it preferably has a basis weight of from about 10 to about 100 g / m 2 and More preferably, it has a basis weight of about 20 to about 50 g / m 2 .
  • the ridge groove surface may face either the user side or the underwear side, but the absorbent body cannot be absorbed and reaches the third sheet. From the viewpoint that the absorbed liquid can be quickly absorbed by capillarity in the heel portion having a large amount of fibers, and then the liquid absorbed in the orientation direction of the tow fibers can be transferred and then returned to the absorber.
  • the surface is preferably facing the user side.
  • the web of tow is arranged so that the orientation direction of the tow fibers and the longitudinal direction of the absorbent article coincide with each other.
  • the tow fibers May not be aligned with the longitudinal direction of the absorbent article.
  • the orientation direction of the tow fibers may be arranged so as to coincide with the direction orthogonal to the longitudinal direction of the absorbent article.
  • the web made of tow can rapidly diffuse the liquid absorbed in the orientation direction of the tow fibers, the direction in which the absorbed liquid is desired to diffuse and the orientation direction of the tow fibers Should be matched.
  • the liquid permeable top sheet may be formed of a web made of tow.
  • the liquid-permeable top sheet may be a laminate in which a web made of tow is laminated on a nonwoven fabric or the like.
  • the tow web When the tow web is used as a liquid permeable topsheet, it preferably has a basis weight of about 10 to about 100 g / m 2 and has a basis weight of about 20 to about 50 g / m 2 . It is more preferable to have. Further, when the web made of the tow is used as a top sheet, the ridge groove surface may face either the user side or the underwear side. It is preferable that the groove surface is directed to the user side from the viewpoint of absorbing the phenomenon quickly and then allowing the absorbed liquid to move in the orientation direction of the tow fibers.
  • the topsheet contains a web of tow so that the absorbed liquid can be quickly diffused in a wide area, especially in the direction of fiber orientation of the tow, without causing leakage, before transferring it to the absorbent body. Can be absorbed by the body.
  • the web of tow according to the present disclosure preferably has a liquid diffusion length of about 40 mm or more, more preferably about 50 mm or more, and more preferably about 60 mm or more in the toe fiber orientation direction. More preferably, it has a liquid diffusion length. When the liquid diffusion length is about 40 mm or more, the absorbed liquid can be quickly diffused in the orientation direction of the tow fibers.
  • the liquid diffusion length can be measured as follows. 1. A sample having a size of 100 ⁇ 100 mm is placed on a wire mesh having, for example, ⁇ : 0.5 mm and pitch: 3 mm. 2. The lower end of the dropping funnel containing 40 g of physiological saline is fixed at the center of the test and at a height of 10 mm from the sample, and the physiological saline is dropped on the sample in about 5 seconds. 3. After about 30 seconds, the liquid diffusion length (the fiber orientation direction and its orthogonal direction), which is the length of diffusion of the physiological saline, is measured.
  • the web made of tow according to the present disclosure preferably has a thickness retention of about 60% or more, and more preferably has a thickness retention of about 70% or more.
  • the thickness retention is about 60% or more, even when body pressure is applied, there is a tendency that deformation is difficult.
  • a measurement is implemented at room temperature (25 degreeC), and employ
  • the thickness can be measured with a THICKNESS GAUGE UF-60 manufactured by Daiei Scientific Instruments Co., Ltd.
  • the towed web according to the present disclosure preferably has a thickness retention of about 60% or more, more preferably about 70% or more, and more than about 80% when wet. More preferably, it has a thickness retention. By having a thickness retention of about 60% or more when containing water, it tends to be difficult to deform after absorbing the liquid.
  • the thickness retention rate when containing water can be measured as follows. 1. The sample is cut to a size of 100 ⁇ 100 mm and the initial thickness is measured under a pressure of 0.5 kPa. 2. 10 g of physiological saline is added to the whole sample, and a weight is immediately placed so that the pressure is 34.3 kPa. The pressure is applied for 1 minute, the weight is removed, and 10 seconds later, the pressure is applied under a pressure of 0.5 kPa. Measure thickness after pressing.
  • Thickness retention (%) 100 ⁇ thickness after pressing / initial thickness (3) Ask according to.
  • a measurement is implemented at room temperature (25 degreeC), and employ
  • the thickness can be measured with a THICKNESS GAUGE UF-60 manufactured by Daiei Scientific Instruments Co., Ltd.
  • the web comprising the tow according to the present disclosure has a breaking strength of about 1.5 times or more in the direction orthogonal to the fiber orientation direction, compared to the raw tow, which does not have a groove surface and an entanglement point.
  • it has a breaking strength of about 2.0 times or more, and more preferably has a breaking strength of about 2.5 times or more.
  • the web comprising the tow according to the present disclosure has a plurality of entanglement points where the tow fibers are entangled, but it is difficult to directly evaluate the number, density, and the like of the entanglement points. Therefore, the density of the entanglement points can be indirectly evaluated by measuring the breaking strength in the direction orthogonal to the fiber orientation direction. This is because when the fibers are not entangled, the breaking strength should theoretically be close to zero.
  • the breaking strength can be measured as follows. 1. The sample is cut to a size of 25 mm in the fiber orientation direction and 100 mm in a direction perpendicular to the fiber orientation direction. 2. Both ends in the direction orthogonal to the fiber orientation direction of the sample are fixed to a chuck of a jig, and 10 mm is fixed to a digital force gauge with a distance between chucks of 80 mm.
  • An example of the digital force gauge is FGC-0.2 manufactured by SHIMPO.
  • the digital force is stretched at 5 mm / second in a direction perpendicular to the orientation direction of the tow fiber, and the breaking strength, which is the strength when the sample breaks, is measured.
  • a measurement is implemented at room temperature (25 degreeC), and employ
  • the breaking strength the elongation at break, which is the elongation when the sample breaks, can be measured.
  • the web made of tow according to the present disclosure can be formed from tow.
  • Tow is also referred to as a fiber bundle, and in the present specification, it means a bundle of continuous filaments in which each filament is oriented in a certain direction.
  • a hydrophilic fiber is preferable.
  • the fiber having hydrophilicity include fibers having hydrophilicity in nature and fibers having essentially hydrophilicity but imparted with hydrophilicity by being subjected to a hydrophilic treatment.
  • the essentially hydrophilic fiber examples include nylon, acrylic, acetate, and rayon.
  • the fibers imparted with hydrophilicity include various synthetic fibers, that is, single fibers such as polyethylene, polypropylene, and polyethylene terephthalate, and composite fibers containing two or more of these treated with a surfactant.
  • fibers that retain bulkiness even when wetted are preferable, and acetate is preferable from the viewpoint of hardly retaining liquid while having hydrophilicity in nature.
  • acetate cellulose triacetate and cellulose diacetate are preferable.
  • a web comprising a tow according to the present disclosure can be formed by spraying a fluid on the tow.
  • the tow fibers receive kinetic energy from the ejected fluid and entangle with other fibers to form an entanglement point.
  • the fluid collision surface the surface where the fluid collides
  • the ejected fluid collides and then rebounds, so that it is orthogonal to the conveying direction (hereinafter referred to as “orthogonal direction”).
  • a groove surface having a plurality of flange portions and a plurality of groove portions is formed.
  • the conveying direction during manufacture coincides with the orientation direction of the tow fibers and the directions of the plurality of flanges and grooves.
  • FIG. 8 is a diagram showing an example of a method for forming a web made of tow.
  • the tow 16 having a certain basis weight is placed on the support 17 so that the fiber orientation direction of the tow 16 coincides with the conveyance direction MD, that is, the axial direction of the fiber of the tow 16 coincides with the conveyance direction MD.
  • the fluid ejected from the fluid nozzle 18 is sprayed on the tow 16.
  • a suction part (not shown) for receiving fluid is provided under the fluid nozzle 18 with the support 17 interposed therebetween.
  • the fluid ejected from the fluid nozzle 18 is sprayed on the tow 16 which is placed on the support 17 and carried, and the web 1 made of the tow having a specific groove structure and an entanglement point is formed.
  • the sprayed fluid is discharged from a suction part (not shown).
  • the basis weight of the tow for forming the web made of tow is almost the same as the basis weight of the web made of tow. This is because the tow web and the tow size before the fluid is sprayed are substantially the same.
  • a staggered punching plate is shown as the support body 17, but as the punching plate, for example, a round hole type, for example, a round hole 60 ° zigzag type, a round hole square zigzag, and a round hole series
  • the punching plate include a mold, a square hole type, a round dove type, a cloud type, and a cloud staggered type.
  • a part of the fiber moves along the flow of the fluid.
  • a support having protrusions and depressions having a predetermined shape and arrangement is disposed, an uneven surface having protrusions and recesses is formed on the opposite side of the groove surface. You can also.
  • Examples of the support having the protrusions and the depressions include (i) protrusions and depressions that are parallel to the conveying direction, and are alternately arranged in the orthogonal direction. (Ii) Projections and depressions having an inclination with respect to the conveying direction, and having projections and depressions alternately arranged in a direction perpendicular to the direction of the inclination A body, (iii) a projecting portion and / or a hollow portion having a predetermined shape (for example, a cubic shape, a columnar shape, a hemispherical shape, etc.), and a predetermined array (for example, a heart shape, a star shape, etc.) ) And the like having a projecting portion and a recessed portion arranged in the above.
  • a predetermined shape for example, a cubic shape, a columnar shape, a hemispherical shape, etc.
  • a predetermined array for example, a heart shape, a star shape, etc.
  • the fluid includes air, for example, heated air, water vapor, for example, saturated water vapor and superheated water vapor, or water, for example, hot water. Considering that the subsequent drying step is unnecessary or less, heated fluid, saturated steam and superheated steam are preferable as the fluid.
  • the fluid can be sprayed to the tow from a fixed fluid nozzle or from a fluid nozzle that reciprocates in the orthogonal direction.
  • the fluid can be sprayed from the fluid nozzle to the tow continuously or intermittently in order to adjust the entanglement point of the web made of tow and the shapes of the ridge and groove.
  • these can also be combined.
  • the groove is formed at a location where the fluid collides with the tow. Therefore, the distance between the fluid nozzles when the fluid is sprayed is determined by the desired groove and the groove on the surface of the groove formed on the toe web. It can arrange
  • the conditions for spraying the fluid include, for example, when the fluid is water vapor, the ejection pressure: about 0.1 to about 0.9 MPa, the water vapor temperature: about 110 to about 170 ° C., and the distance between the nozzle and the support: about 1 0.0 to about 5.0 mm.
  • the fluid is heated air, for example, air of about 105 ° C. and an air volume of about 1200 L / min is blown from a plurality of nozzles arranged with a diameter of 1.0 mm and a pitch of 6.0 mm. it can.
  • the tension for pulling the tow is not so high.
  • liquid-permeable top sheet those usually used in the art can be selected without particular limitation, and examples thereof include non-woven fabrics, woven fabrics, and all or a part thereof.
  • a liquid-permeable resin film in which a large number of liquid-permeable holes are formed, and a net-like sheet having a large number of meshes.
  • the nonwoven fabric include spunlace nonwoven fabric formed from cellulose fibers such as rayon, synthetic resin fibers, and the like, and air-through nonwoven fabric formed from the synthetic resin fibers.
  • the resin film and net-like sheet include those formed from polypropylene, polyethylene, polyethylene terephthalate, and the like.
  • liquid-impermeable back sheet those usually used in the art can be used without particular limitation, and examples thereof include a low-density polyethylene sheet.
  • the leak barrier is an optional element and, if present, can be similar to the topsheet.
  • optional superabsorbent polymers include those commonly used in the art, such as synthetic polymer absorbents such as starch, cellulose, polyacrylic acid, polyvinyl alcohol, poly Examples include acrylamide-based and polyoxyethylene-based absorbent materials.
  • a polyacrylic acid-based absorbent is preferable, and among them, a sodium polyacrylate-based absorbent is preferable.
  • the core wrap as desired includes those commonly used in the art, such as tissue, hydrolyzed tissue, and non-woven fabric (SMS, SB, etc.).
  • Examples of the absorbent article of the present disclosure include disposable diapers, incontinence pads, sanitary napkins, panty liners, etc., but in the absorbent article of the present disclosure, the web made of tow has excellent liquid diffusibility, and Disposable diapers, incontinence pads, and sanitary napkins that absorb large amounts of liquid are particularly preferred because they are less likely to deform after absorbing liquid.
  • Tow-containing sample No. The photograph of 1 is shown in FIG.9 and FIG.10.
  • 9 shows tow-containing sample No. 1 is a photograph taken with the groove surface facing the front
  • FIG. 1 is a photograph taken from a cross-sectional direction.
  • 9 and 10 MD indicates the conveyance direction, and coincides with the direction in which the flange portion 2, the groove portion 3, and the tow fibers are oriented.
  • CD indicates an orthogonal direction. Although it is difficult to distinguish from the photograph, the tow-containing sample No. 1 had a plurality of entanglement points.
  • tow-containing sample No. 1 the height of the ridge was about 1.5 mm, and the height of the groove was about 0.3 mm.
  • the thickness was measured in a non-contact manner using a laser displacement meter.
  • a laser displacement meter a high-precision two-dimensional laser displacement meter LJ-G series (model: LJ-G030) manufactured by Keyence Corporation was used.
  • Production Example 2 The tow (basis weight: 50 g / m 2 ) molded in Production Example 1 was added to the tow-containing sample No. 2.
  • Tow-containing sample no. 1 and no. 2 is 25 mm in the direction in which the fibers are oriented (corresponding to the conveying direction MD in FIG. 9), and 100 mm in the direction perpendicular to the orientation of the fibers (corresponding to the orthogonal direction CD in FIG. 9). It cut so that it might have, and measured the above-mentioned breaking strength and elongation at break. For the measurement, FGC-0.2 manufactured by SHIMPO was used. The results are shown in Table 1 below.
  • tow-containing sample No. No. 1 is a tough-containing sample No. 1 2.5 times higher than 2. This is tow-containing sample No. It is considered that 1 is caused by having a plurality of entanglement points.
  • Example 2 [Liquid diffusion length] Tow-containing sample no. 1 and no. The liquid diffusion length and water absorption of 2 were evaluated according to the methods described herein. The results are shown in Table 2 below.
  • Tow-containing sample No. No. 1 has a liquid diffusibility equal to or higher than that of the tow-containing sample No. 2 having a high liquid diffusibility.
  • the water absorption rate is also equivalent.
  • Example 3 [Thickness retention and thickness retention when containing water] Tow-containing sample no. 1 and no. The thickness retention rate of 2 and the thickness retention rate when containing water were evaluated according to the methods described herein. The results are shown in Table 3 below.
  • tow-containing sample No. 1 shows tow-containing sample No. 1; It can be seen that both the thickness retention ratio and the moisture retention ratio are excellent compared to 2.
  • An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body between the liquid-permeable top sheet and the liquid-impermeable back sheet,
  • the absorbent article comprises a web of tow;
  • the web comprising the tow has a ridge groove surface including a plurality of ridge portions and a plurality of groove portions along the orientation direction of the fibers of the tow,
  • the tow web has a plurality of entanglement points formed by entanglement of the tow fibers.
  • the said absorbent article characterized by the above-mentioned.
  • a web comprising the tow is a top sheet, a second sheet disposed between the top sheet and the absorber, and / or a third disposed between the absorber and the back sheet.

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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)

Abstract

La présente invention concerne un article absorbant qui comprend un réseau formé d'un matériau céramique qui possède une bonne capacité de diffusion, se déforme difficilement après l'absorption de liquide, et conserve sa capacité de diffusion du liquide. L'article absorbant de la présente description a la configuration suivante. L'article absorbant comprend : une feuille supérieure perméable aux liquides ; une feuille de support perméable aux liquides ; et un absorbeur disposé entre la feuille supérieure perméable aux liquides et la feuille de support perméable aux liquides. L'article absorbant est caractérisé en ce que : l'article absorbant comprend un réseau formé par un matériau céramique ; le réseau a une surface composée de crêtes et de sillons et une pluralité de crêtes et une pluralité de sillons dans une direction d'orientation de fibres du matériau céramique; et les fibres du matériau céramique forment une pluralité de points intercalés.
PCT/JP2012/054154 2011-03-31 2012-02-21 Article absorbant WO2012132644A1 (fr)

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JP2011080096A JP5916292B2 (ja) 2011-03-31 2011-03-31 吸収性物品
JP2011-080096 2011-03-31

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JP5634631B1 (ja) * 2014-05-09 2014-12-03 ユニ・チャーム株式会社 吸収性物品
WO2024099133A1 (fr) * 2022-11-08 2024-05-16 露乐健康科技股份有限公司 Noyau d'absorption extrêmement rapide, son procédé de préparation et utilisation associée

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JP6234046B2 (ja) * 2013-03-31 2017-11-22 ユニ・チャーム株式会社 吸収性物品
JP6257248B2 (ja) * 2013-09-30 2018-01-10 ユニ・チャーム株式会社 吸収性物品
JP6159637B2 (ja) * 2013-09-30 2017-07-05 ユニ・チャーム株式会社 吸収性物品
JP6159636B2 (ja) * 2013-09-30 2017-07-05 ユニ・チャーム株式会社 吸収性物品
JP6441629B2 (ja) * 2014-09-25 2018-12-19 大王製紙株式会社 吸収性物品
JP6566657B2 (ja) * 2015-02-18 2019-08-28 花王株式会社 積層不織布
JP6850598B2 (ja) * 2016-12-19 2021-03-31 花王株式会社 吸収性物品

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JPS6088551A (ja) * 1983-09-23 1985-05-18 パーソナル・プロダクツ・カンパニー 使い捨て尿用パッド
WO2006101061A1 (fr) * 2005-03-23 2006-09-28 Kao Corporation Articles absorbants

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
JPS6088551A (ja) * 1983-09-23 1985-05-18 パーソナル・プロダクツ・カンパニー 使い捨て尿用パッド
WO2006101061A1 (fr) * 2005-03-23 2006-09-28 Kao Corporation Articles absorbants

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5634631B1 (ja) * 2014-05-09 2014-12-03 ユニ・チャーム株式会社 吸収性物品
WO2014196666A1 (fr) * 2014-05-09 2014-12-11 ユニ・チャーム株式会社 Article absorbant
AU2014275790B2 (en) * 2014-05-09 2016-04-21 Unicharm Corporation Absorbent article
CN106255486A (zh) * 2014-05-09 2016-12-21 尤妮佳股份有限公司 吸收性物品
TWI655937B (zh) * 2014-05-09 2019-04-11 日商優你 嬌美股份有限公司 Absorbent article
WO2024099133A1 (fr) * 2022-11-08 2024-05-16 露乐健康科技股份有限公司 Noyau d'absorption extrêmement rapide, son procédé de préparation et utilisation associée

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JP2012213480A (ja) 2012-11-08

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