WO2017209009A1 - 不織布 - Google Patents

不織布 Download PDF

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Publication number
WO2017209009A1
WO2017209009A1 PCT/JP2017/019768 JP2017019768W WO2017209009A1 WO 2017209009 A1 WO2017209009 A1 WO 2017209009A1 JP 2017019768 W JP2017019768 W JP 2017019768W WO 2017209009 A1 WO2017209009 A1 WO 2017209009A1
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WO
WIPO (PCT)
Prior art keywords
group
nonwoven fabric
liquid film
cleaving agent
liquid
Prior art date
Application number
PCT/JP2017/019768
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
華 鈴木
吉晃 蒲谷
裕太 寒川
Original Assignee
花王株式会社
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 花王株式会社 filed Critical 花王株式会社
Priority to RU2018146046A priority Critical patent/RU2753916C2/ru
Priority to CN201780033099.7A priority patent/CN109312530B/zh
Publication of WO2017209009A1 publication Critical patent/WO2017209009A1/ja

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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
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H13/00—Other non-woven fabrics
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
    • D06M15/647—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain containing polyether sequences
    • 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
    • A61F13/51—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 outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • 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
    • A61F13/51—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 outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/513—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability

Definitions

  • the present invention relates to a nonwoven fabric.
  • Patent Document 1 describes an absorbent article in which a hydrophobic gel-like composition capable of maintaining a gel state at 38 ° C. is intermittently applied to the skin side surface of a top sheet. Yes.
  • the coating region of the gel composition on the skin surface side is hydrophobic, while the inside is made hydrophilic. Due to the hydrophobic water-repellent action of the coated area and the hydrophilic water-absorbing action of the inside, the liquid is drawn into the top sheet through the non-coated area where the gel composition is not coated. It will be easier.
  • Patent Document 3 describes an absorbent article in which a Chinese medicine material layer is provided on a top sheet from the viewpoint of exerting a skin care function. Amphiphiles are used as binders in the herbal medicine material layer. It is said that the herbal medicine material layer is less likely to drop off from the top sheet due to the hydrophobicity of the amphiphile, and the liquid absorption rate can be prevented from being reduced due to the hydrophilicity of the amphiphile.
  • the present invention has a containing part containing a liquid film cleaving agent and a non-containing part not containing the liquid film cleaving agent, and at least one of the containing part and the non-containing part is on the surface of the nonwoven fabric.
  • Nonwoven fabrics are provided that are spaced apart from one another.
  • this invention has a containing part containing the following compound C1, and a non-containing part not containing the following compound C1, and at least one of the containing part and the non-containing part is a plurality of mutually on the nonwoven fabric surface.
  • a nonwoven fabric is provided that is spaced apart.
  • Compound C1 A compound having an expansion coefficient of 15 mN / m or more for a liquid having a surface tension of 50 mN / m. Further, the present invention has a containing part containing the following compound C2 and a non-containing part not containing the following compound C2, and at least one of the containing part and the non-containing part is a plurality of mutually on the nonwoven fabric surface. A nonwoven fabric is provided that is spaced apart.
  • Compound C2 A compound having an expansion coefficient greater than 0 mN / m for a liquid having a surface tension of 50 mN / m and an interfacial tension of 20 mN / m or less for a liquid having a surface tension of 50 mN / m.
  • FIG. 6 is a partially enlarged plan view showing another preferred embodiment of the nonwoven fabric according to the present invention, wherein (A) shows a plurality of inclusion parts formed in rhombuses in a lattice-like non-containing part on the nonwoven fabric surface. The arranged pattern is shown, and (B) shows a pattern in which a plurality of non-containing parts shaped like rhombuses are arranged apart from each other in the lattice-shaped containing parts on the surface of the nonwoven fabric.
  • FIG. 1 It is a partially expanded plan view which shows other preferable embodiment of the nonwoven fabric which concerns on this invention, (A) is the inclusion part and the non-contained part which were extended in the longitudinal direction of the nonwoven fabric surface alternately arranged in the width direction. A pattern is shown, (B) shows the pattern by which the containing part extended in the width direction of a nonwoven fabric surface, the non-containing part, and the longitudinal direction were alternately arranged. It is explanatory drawing which shows typically the length of the containing part and the length of a non-containing part on this virtual line when drawing the virtual line along the width direction of a nonwoven fabric arbitrarily, (A) is about the pattern of FIG.
  • (B) shows the pattern when the containing part of (A) is elliptical
  • (C) shows the pattern of FIG. 3 (A) partially enlarged
  • (D) shows the figure. It shows about the pattern of 2 (B).
  • (A1) to (A4) are explanatory views schematically showing from the side the state in which the liquid film cleaving agent according to the present invention cleaves the liquid film
  • (B1) to (B4) are liquid crystals according to the present invention. It is explanatory drawing which shows typically the state which a film
  • FIG. 6 is a perspective view schematically showing still another preferred embodiment (third embodiment) of the nonwoven fabric according to the present invention with a partial cross section, wherein (A) shows a nonwoven fabric composed of one layer, and (B) shows two layers.
  • the nonwoven fabric which consists of is shown.
  • It is a perspective view which shows typically another preferable aspect (4th embodiment) of the nonwoven fabric which concerns on this invention.
  • FIG. shows typically another preferable aspect (5th embodiment) of the nonwoven fabric which concerns on this invention.
  • It is explanatory drawing which shows typically the state by which the constituent fibers of the nonwoven fabric shown in FIG. 13 were fixed in the heat-fusion part.
  • It is a perspective view which shows typically another preferable aspect (7th embodiment) of the nonwoven fabric which concerns on this invention.
  • the present invention relates to a non-woven fabric having an improved liquid flow preventing property on the surface while reducing a liquid film formed between fibers of the non-woven fabric to achieve a higher level of liquid remaining reduction.
  • the nonwoven fabric used for the surface sheet or the like there is a region where the distance between the fibers is narrow. Even if there is a space in the area that can pass excretory fluid (for example, urine and menstrual blood, also simply liquid), meniscus force between fibers, surface activity by plasma proteins, and blood surface viscosity are high. A stable liquid film is formed between the fibers, and the liquid tends to stay. In the prior art, the liquid film cannot be completely eliminated, and there is still room for improvement in the dryness. Furthermore, in recent years, in addition to dryness, consumers are demanding good touch. Therefore, the use of fine fibers has been performed. However, when thin fibers are used, the distance between the fibers becomes narrower.
  • excretory fluid for example, urine and menstrual blood, also simply liquid
  • the absorption target liquid is not limited to blood.
  • urine since urine also has surface activity due to phospholipids, a liquid film is formed in the same manner as described above, leading to liquid residue, and as a result, there is still room for improvement in dryness.
  • a technique for removing a liquid film that can form a narrow portion between fibers in a nonwoven fabric However, it was difficult to remove due to the high stability of the liquid film. It is also conceivable to apply a water-soluble surfactant in order to lower the surface tension of the liquid and remove the liquid film.
  • the non-woven fabric of the present invention can improve the liquid flow preventing property on the surface while reducing the liquid film formed between the fibers of the non-woven fabric to achieve a higher level of liquid remaining reduction.
  • nonwoven fabric for example, a nonwoven fabric 5 as shown in FIG.
  • the nonwoven fabric of this invention can be applied to various articles
  • the nonwoven fabric 5 has a containing part 6 containing a liquid film cleaving agent and a non-containing part 7 not containing the liquid film cleaving agent on the nonwoven fabric surface.
  • the containing part 6 is made circular (dot shape).
  • a plurality of circular containing portions 6 are arranged apart from each other. This arrangement is preferably an arrangement along a plurality of intersecting directions on the nonwoven fabric surface. More preferably, the plurality of intersecting directions include a first direction of the nonwoven fabric and a second direction orthogonal to the first direction.
  • the first direction and the second direction are particularly preferably a longitudinal direction and a width direction in the nonwoven fabric original fabric (that is, a longitudinal direction and a width direction in the absorbent article).
  • a plurality of circular containing portions 6 are arranged on the surface of the nonwoven fabric so as to be spaced apart from each other along both the longitudinal direction (Y direction) and the width direction (X direction) of the nonwoven fabric 5 in a plurality of directions.
  • the non-containing part 7 is adjacent to the plurality of containing parts 6 and is continuously extended and arranged so as to separate the containing parts 6 from each other.
  • the containing parts 6 are arranged in an island-like pattern in which the containing parts 6 are spaced apart from each other in a continuous region of the non-containing parts 7.
  • sequence of the containing part 6 and the non-containing part 7 may exist in the whole surface of the surface of the nonwoven fabric 5, and may exist in a part (same in the following various forms).
  • the pitch between the containing parts 6 and 6 is constant (pitch P1).
  • the entire rows are arranged so as to be shifted from each other in the longitudinal direction by a half pitch so that the containing portion 6 is not adjacent in the width direction (X direction).
  • the containing portions 6 are arranged in the width direction.
  • the pitch P2 between the containing parts 6 and 6 arranged in the width direction in the two adjacent rows is the same as the pitch P1 in the longitudinal row described above. That is, as the whole nonwoven fabric 5, it arranges periodically so that the pitch P1 of the containing part 6 of a longitudinal direction and the pitch P2 of the containing part 6 of the width direction may become the same.
  • the containing portions 6 are arranged not only in the longitudinal direction and the width direction, but also in two inclined directions D1 and D2 that intersect the longitudinal direction and the width direction. That is, in the nonwoven fabric 5, the containing portions 6 are periodically arranged at a distance from each other in at least four directions on the nonwoven fabric surface.
  • the said longitudinal direction (Y direction) is a direction where the length of a nonwoven fabric is comparatively long as the name suggests, and when the nonwoven fabric is made into a roll shape as an original fabric, or from the state made into a roll shape. When unwound, it means the direction in which the nonwoven fabric is unwound.
  • the said width direction (X direction) is a direction orthogonal to the said longitudinal direction, and means the roll-axis direction in the said original fabric state.
  • the orientation direction of the fiber which comprises a nonwoven fabric is known, it can be said that the orientation method of a fiber is a longitudinal direction. At this time, it can be said that the width direction is a direction orthogonal to the fiber orientation method.
  • the said longitudinal direction means a machine carrying-out direction (MD: Machine Direction) in the manufacturing stage of a nonwoven fabric.
  • the said width direction means the width direction (CD: Cross Direction) orthogonal to a machine carrying-out direction in the manufacture stage of a nonwoven fabric.
  • the longitudinal direction of the nonwoven fabric is a direction that coincides with the longitudinal direction of the absorbent article.
  • the containing part 6 and the non-containing part 7 are classified according to the presence or absence of a liquid film cleaving agent.
  • FIG. 1 although the pattern is attached
  • blotting paper is applied to the surface of the nonwoven fabric 5, an acrylic plate having a thickness of 4 mm is placed, and a weight is applied for 30 seconds so as to be 600 g / cm 2 from the top.
  • the oil-blotting paper is peeled off, and the oil-blotting paper is placed on a black mount and the color change is visually confirmed.
  • the part where the color has changed is the containing part 6 containing the liquid film cleaving agent, and the other part is the non-containing part 7.
  • Various materials can be used as the above-mentioned oil blotting paper, and examples thereof include gold leaf punching paper manufacturing oil blotting paper manufactured by Katani Sangyo Co., Ltd.
  • the above-described method for confirming the classification is the same in the following various arrangement forms: the length of the containing part 6 in the width direction, the length of the non-containing part 7, the total area of the containing part 6 and the non-containing part Similarly, in the measurement of the total area of 7, the blotting paper is used.
  • the liquid film cleaving agent contained in the containing part 6 is a liquid film formed between the fibers of the nonwoven fabric or on the fiber surface when the liquid, for example, highly viscous liquid such as menstrual blood or excretion liquid such as urine touches the nonwoven fabric. It refers to an agent that inhibits the formation of a liquid film by cleaving it, and has an action of cleaving the formed liquid film and an action of inhibiting the formation of the liquid film.
  • the former can be called the main action, and the latter can be called the subordinate action.
  • the cleaving of the liquid film is performed by the action of the liquid film cleaving agent to destabilize by pushing away a part of the liquid film layer.
  • the liquid film cleaving agent By the action of the liquid film cleaving agent, the liquid can easily pass through without staying in a narrow region between the fibers of the nonwoven fabric. That is, the nonwoven fabric has excellent liquid permeability. Thereby, even if the fiber which comprises a nonwoven fabric is made thin and the distance between fibers is narrowed, softness of touch and liquid remaining suppression are compatible.
  • the liquid film cleaving agent used in the present invention has the property of eliminating the liquid film, and due to this property, the liquid film cleaving agent is applied to a test liquid or artificial urine mainly composed of plasma components. Moreover, the liquid film disappearance effect can be expressed. Artificial urine is 1.940% by weight of urea, 0.795% by weight of sodium chloride, 0.110% by weight of magnesium sulfate, 0.062% by weight of calcium chloride, 0.197% by weight of potassium sulfate, red No.
  • the surface tension of a mixture having a composition of 0.010% by weight, water (about 96.88% by weight) and polyoxyethylene lauryl ether (about 0.07% by weight) was adjusted to 53 ⁇ 1 mN / m (23 ° C.).
  • the liquid film disappearance effect here refers to the effect of inhibiting the liquid film formation of the structure and the formed structure of the structure in which air is held by the liquid film formed from the test liquid or artificial urine. It can be said that an agent that exhibits both of the effects of disappearing the body and that exhibits at least one of the effects has the property of exhibiting the effect of disappearing the liquid film.
  • the test solution is a liquid component extracted from equine defibrinated blood (manufactured by Nippon Biotest Co., Ltd.). Specifically, when 100 mL of equine defibrinated blood is allowed to stand at a temperature of 22 ° C. and a humidity of 65% for 1 hour, the equine defibrinated blood is separated into an upper layer and a lower layer. It is.
  • the upper layer mainly contains plasma components
  • the lower layer mainly contains blood cell components.
  • a transfer pipette manufactured by Nippon Micro Corporation
  • Whether or not an agent has the above-mentioned property of “disappearing a liquid film” depends on whether a liquid film formed from the test solution or artificial urine to which the agent is applied generates a structure that is trapped in air. It is judged by the amount of the structure, that is, the liquid film when it is in a state where it is easy to do. That is, the test solution or artificial urine is adjusted to a temperature of 25 ° C., and then 10 g is put into a screw tube (No. 5 body diameter 27 mm, total length 55 mm, manufactured by Maruemu Co., Ltd.) to obtain a standard sample.
  • a screw tube No. 5 body diameter 27 mm, total length 55 mm, manufactured by Maruemu Co., Ltd.
  • a measurement sample obtained by adding 0.01 g of an agent to be measured, which is adjusted in advance to 25 ° C., to the same sample as the standard sample is obtained.
  • the standard sample and the measurement sample are vigorously shaken twice in the vertical direction of the screw tube, and then quickly placed on a horizontal plane. By shaking the sample, the structure of the liquid layer (lower layer) without the structure and a large number of structures formed on the liquid layer (the lower layer) is formed inside the screw tube after shaking. Upper layer). After the elapse of 10 seconds immediately after shaking, the height of the structure layers of both samples (the height from the liquid surface of the liquid layer to the upper surface of the structure layer) is measured.
  • the agent to be measured has a liquid film cleavage effect.
  • the liquid film cleaving agent used in the present invention satisfies the above properties by a single compound that meets the above properties, a mixture of a plurality of single compounds that meet the above properties, or a combination of a plurality of compounds (liquid Agent capable of developing membrane cleavage). That is, the liquid film cleaving agent is an agent limited to those having a liquid film cleaving effect as defined above.
  • the compound applied in the absorbent article contains a third component that does not meet the above definition, it is distinguished from a liquid film cleaving agent.
  • the “single compound” is a concept including compounds having the same composition formula but having different molecular weights due to different numbers of repeating units.
  • the liquid film cleaving agent it can be appropriately selected from those described in paragraphs [0007] to [0186] of the specification of WO2016 / 098796.
  • the content 6 of the nonwoven fabric containing or containing a liquid film cleaving agent mainly means that it is adhered to the surface of the fiber.
  • the liquid film cleaving agent may be a liquid film cleaving agent that is encapsulated in the fiber or that is present inside the fiber by internal addition.
  • a method for attaching the liquid film cleaving agent to the fiber surface various commonly used methods can be employed without any particular limitation. For example, flexographic printing, ink jet printing, gravure printing, screen printing, spraying, brush application and the like can be mentioned.
  • These treatments may be carried out after the fibers are made into a web by various methods, and then after the web is made into a nonwoven fabric or incorporated into an absorbent article.
  • the fiber having the liquid film cleaving agent attached to the surface is dried at a temperature sufficiently lower than the melting point of the fiber resin (for example, 120 ° C. or less) by, for example, a hot air blowing type dryer.
  • the liquid film cleaving agent according to the present invention needs to exist as a liquid when the liquid film cleaving agent touches body fluid in order to have the liquid film cleaving effect described later in the nonwoven fabric. From this point, the melting point of the liquid film cleaving agent according to the present invention is preferably 40 ° C. or less, and more preferably 35 ° C. or less. Furthermore, the melting point of the liquid film cleaving agent according to the present invention is preferably ⁇ 220 ° C. or higher, more preferably ⁇ 180 ° C. or higher.
  • the liquid film cleaving agent has a smaller surface tension than conventional hydrophilizing agents used for nonwoven fabric fibers. That is, the contact angle of the constituent fibers of the containing part 6 is larger than the contact angle of the constituent fibers of the non-containing part 7. Therefore, the constituent fibers of the containing portion 6 are given lubricity or hydrophobicity by the liquid film cleaving agent, and enhance the lubricity of the liquid on the surface of the nonwoven fabric as compared with the case without the liquid film cleaving agent. In particular, when liquid is first received from a dry surface, the liquid tends to flow out. On the other hand, since the non-containing part 7 does not have a liquid film cleaving agent, the liquid does not flow out on the surface of the nonwoven fabric 5.
  • the liquid film in the process in which the droplet of excretory liquid or the droplet flowing through the wearer's body when the absorbent article is attached flows on the surface of the non-woven fabric when first contacting the non-woven fabric or after contacting the non-woven fabric. It overlaps over both the containing part 6 containing a cleaving agent and the non-containing part 7 not containing a liquid film cleaving agent. In such an overlap, the cleaving action of the liquid film in the containing part 6 and the liquid flow suppressing action by the non-containing part are simultaneously manifested with respect to the droplet.
  • the liquid film formed by entering between the fibers is cleaved to increase the liquid permeability in the thickness direction.
  • the surface flow preventive property of the liquid can be enhanced while achieving and maintaining a high liquid residue reduction of the nonwoven fabric 5.
  • action of a liquid film cleaving agent and the detail of a specific example are mentioned later.
  • the surface flow preventing property of the liquid described above is that the non-containing part 7 that does not contain the liquid film cleaving agent is arranged continuously or intermittently in a plurality of directions, thereby suppressing the occurrence of liquid flow on the nonwoven fabric surface, And even if a liquid flow arises, it is because the liquid flow prevention effect
  • sequence of the non-containing part 7 is an arrangement
  • the containing portions 6 are preferably arranged in an island-like pattern in which islands are spaced apart from each other in the continuous non-containing portion 7 region.
  • positioning of the non-containing part 7 is that the some non-containing part 7 isolate
  • the liquid droplets overlap across both the containing part 6 containing the liquid film cleaving agent and the non-containing part 7 not containing the liquid film cleaving agent, so that the liquid film between the fibers of the nonwoven fabric 5 becomes a liquid film. Cleavage is caused by the action of the cleaving agent, and the permeability of the liquid in the thickness direction of the nonwoven fabric is increased.
  • the liquid film cleaving agent has extensibility with respect to the liquid as will be described later. Therefore, the liquid film cleaving agent is contained over the containing part 6 and the non-containing part 7 and the containing part 6 The liquid film cleaving agent expands to the non-containing part 7.
  • the liquid film cleaving agent is not only expanded on a liquid film in a narrow region such as between fibers in the containing portion 6 described later (micro-expansion), but also from the containing portion 6 that overlaps the droplet to the non-containing portion 7.
  • the liquid film cleaving action as described later of the liquid film cleaving agent is expressed not only in the containing part 6 but also in the non-containing part 7.
  • the expandability of the liquid film cleaving agent itself compensates for the reduction of the liquid film cleaving action by limiting the liquid film cleaving agent to the containing part 6 and maintains the liquid film cleaving action of the nonwoven fabric 5 as a whole.
  • the effect of the expansion of the liquid film cleaving agent to the non-containing part 7 is further enhanced by the fact that the liquid droplets remain in a certain region due to the liquid flow preventing action.
  • the nonwoven fabric 5 can enhance the liquid surface flow prevention property while realizing a high liquid residue reduction.
  • action is especially effective at the point which opens the liquid permeation
  • the degree of macro expansibility of the liquid film cleaving agent from the containing part 6 to the non-containing part 7 depends on various factors. For example, the larger the expansion coefficient described later, the longer the expansion distance in the droplet, and the higher the expandability. Moreover, the expansion distance in a droplet becomes long and the high expansibility is shown, so that the containing basis weight of the liquid film cleaving agent in the containing part 6 is large. Similarly, the liquid film cleaving agent exhibits a suitable high expansibility for droplets by moderately suppressing the viscosity.
  • the viscosity of the liquid film cleaving agent is 0 cps or more, preferably 10,000 cps or less, more preferably 1000 cps or less, and further preferably 200 cps or less.
  • the viscosity of the liquid film cleaving agent can be measured by the following method. First, 40 g of a liquid film cleaving agent is prepared. Next, the viscosity of the liquid film cleaving agent is measured using a tuning fork type vibration viscometer SV-10 (manufactured by A & D Co., Ltd.) in an environmental region of a temperature of 25 ° C. and a relative humidity (RH) of 65%. This is repeated three times, and the average value is adopted as the viscosity.
  • SV-10 tuning fork type vibration viscometer
  • the liquid film cleaving agent When the liquid film cleaving agent is solid, the liquid film cleaving agent is heated to the melting point of the liquid film cleaving agent + 5 ° C. to cause a phase transition to the liquid, and the measurement is carried out while maintaining the temperature condition.
  • a liquid film cleaving agent is taken out from a fiber by the method used in measurement of the expansion coefficient etc. which are mentioned later. In this case, when only a small amount can be taken out for the measurement, identification is performed in the same manner as in the case of measuring an expansion coefficient, which will be described later.
  • the liquid flow preventing effect on the nonwoven fabric surface by the liquid flow preventing action and the liquid remaining reducing effect in the nonwoven fabric by the liquid film cleaving action can be compatible, not the containing part 6 but the non-containing part 7 mutually. They may be spaced apart. Moreover, both the containing part 6 and the non-containing part 7 may be arranged separately from each other. That is, at least one of the containing part 6 and the non-containing part 7 is arranged on the surface of the nonwoven fabric so as to be separated from each other. In any case, the non-containing part 7 is arranged adjacent to the containing part 6.
  • the containing part 6 When only the containing part 6 is arranged away from each other among the containing part 6 and the non-containing part 7, the containing part 6 is included in the arrangement region of the continuous non-containing part 7 as shown in FIG.
  • a sea-island-like arrangement pattern in which islands are arranged apart from each other is preferable.
  • the sea-island-like arrangement pattern in which the non-containing parts 7 are arranged in an island-like manner in the arrangement area of the continuous containing parts 6 Is preferred.
  • Examples of the form in which only the non-containing part 7 is separated from each other include, for example, a form in which the containing part 6 and the non-containing part 7 are interchanged in the arrangement shown in FIG.
  • the above-described liquid flow effect is higher in the sea-island arrangement pattern in which the containing parts 6 are arranged apart from each other in the continuous non-containing part 7. preferable. Further, in the sea-island arrangement pattern described above, the arrangement pitch and the arrangement pattern of the containing parts 6 that are separated from each other or the non-containing parts 7 can be arbitrarily set within a range that does not impede the above two actions.
  • the planar shape of the containing part 6 or the non-containing part 7 arranged apart from each other is not limited to the circular shape shown in FIG. 1 described above, and can be various.
  • the shape of various figures such as a rectangle, the one made of a broken line, a wavy line, or a curve having a predetermined width can be mentioned.
  • a plurality of inclusion parts 6 in the shape of rhombuses are separated from each other in non-containing parts 7 that are continuously extended in a plurality of directions and formed in a lattice shape on the nonwoven fabric surface. Pattern arranged in this way.
  • a plurality of non-containing parts 7 formed in a rhombus shape are separated from each other in a containing part 6 that continuously extends in a plurality of directions and forms a lattice. The pattern arranged in order.
  • the containing parts 6 may be arranged in a wavy line so as to be spaced apart from each other, and the space between the containing parts 6 may be the non-containing part 7.
  • the containing portions 6 may be arranged in a plurality of elliptical shapes having different sizes, arranged concentrically and spaced apart from each other, and the space between the containing portions 6 may be the non-containing portion 7. The arrangement
  • the containing part 6 may be made of a plurality of lines having a geometric shape
  • the space between the containing parts 6 may be a non-containing part
  • the non-containing part 7 may be made of a plurality of lines having a geometric shape
  • Between 7 may be the containing portion 6.
  • the directions arranged apart from each other may be a plurality of directions on the surface of the nonwoven fabric as in the present embodiment, or may be a single direction.
  • the droplets can flow out in various directions on the surface of the nonwoven fabric, it is preferable that the droplets are arranged in a plurality of intersecting directions.
  • the arrangement direction may include at least the longitudinal direction and the width direction of the nonwoven fabric from the viewpoint of enhancing the liquid leakage prevention (leakproof property) of the absorbent article when the nonwoven fabric 5 is applied as a top sheet of the absorbent article. More preferred. For example, specific examples shown in FIGS.
  • both the containing part 6 and the non-containing part 7 extend in a strip shape in the longitudinal direction, and the strip-like containing part 6 and the non-containing part 7 are alternately arranged in the width direction.
  • the bands of the containing part 6 and the non-containing part 7 extending in the width direction are alternately arranged in the longitudinal direction.
  • the nonwoven fabric of the present invention When the nonwoven fabric of the present invention is applied as a surface sheet of an absorbent article, the nonwoven fabric is arranged with the longitudinal direction of the nonwoven fabric directed in the longitudinal direction of the absorbent article. Therefore, it is preferable that the nonwoven fabric of this invention has an arrangement
  • FIG. 3 (A) the arrangement in which the bands of the containing part 6 and the non-containing part 7 are extended in the longitudinal direction, the containing part 6 and the non-containing part 7 as shown in FIG. This is more preferable than the arrangement in which the bands are extended in the width direction.
  • the array of circular containing portions 6 preferably has an array in at least the longitudinal direction and the width direction.
  • the length of the containing part 6 on the virtual line is the non-containing part 7. It is preferable that the length is shorter. More preferably, the transverse direction is a direction that coincides with the width direction of the absorbent article.
  • the length of the containing part 6 and the length of the non-containing part 7 on the imaginary line when the imaginary line is arbitrarily drawn in a direction coinciding with the width direction of the absorbent article are the lengths of the containing part 6 in the width direction, respectively. And the length of the non-containing part 7 in the width direction.
  • FIG. 4A is a partially enlarged view of the arrangement of FIG.
  • the length S1 of the non-containing part 7 is longer than the length S2 of the containing part 6 (S1 > S2) is preferred.
  • the length of the containing part 6 is a diameter of a circle.
  • the length of the non-containing part 7 is a length obtained by subtracting the diameter of the circle from the pitch between the circular containing parts 6 on the virtual line T.
  • FIG. 4B shows a form in which the containing portion 6 has an elliptical shape.
  • the length S1 of the non-containing part 7 is the length S2 of the containing part 6 Longer (S1> S2).
  • the imaginary line T is drawn so as to pass through the center in the longitudinal direction of the ellipse of the containing part 6, and the length of the containing part 6 is the diameter in the width direction passing through the center of the ellipse on the imaginary line T. It is.
  • the length of the non-containing part 7 is a length obtained by subtracting the diameter of the circle from the pitch between the elliptical containing parts 6 on the virtual line T.
  • FIG. 4C is a partially enlarged view showing the arrangement in which the band-shaped containing part 6 and the non-containing part 7 are extended in the longitudinal direction shown in FIG.
  • a virtual line T along the width direction is drawn at an arbitrary position in the longitudinal direction.
  • the length (band width) S1 of the non-containing part 7 is preferably longer than the length (band width) S2 of the containing part 6 (S1> S2).
  • FIG. 4 (D) is a partially enlarged view of the lattice-like arrangement shown in FIG. 2 (B) in which a plurality of non-contained portions 7 shaped like rhombuses are arranged apart from each other in the lattice-like inclusion portion 6.
  • the imaginary line T is drawn so as to pass through the intersection of the containing parts 6. That is, the imaginary line T is drawn at the position where the length of the non-containing part 7 is the longest.
  • the length S1 of the non-containing part 7 is longer than the length S2 of the containing part 6 (S1> S2).
  • the ratio (S2 / S1) of the length (S2) of the containing portion 6 to the length (S1) of the non-containing portion 7 on the imaginary line is preferably 1 or less, and less than 1 from the viewpoint of liquid flow prevention properties. Is more preferable, 2/3 or less is more preferable, and 3/7 or less is particularly preferable. Further, the ratio (S2 / S1) of the length (S2) of the containing part 6 on the imaginary line to the length (S1) of the non-containing part 7 is the ratio in the non-containing part 7 due to macro expansion of the liquid film cleaving agent. From the viewpoint of reducing the remaining liquid, 1/19 or more is preferable, 1/9 or more is more preferable, and 1/4 or more is still more preferable.
  • the total area of the containing part 6 is below the total area of the non-containing part 7. That is, the ratio of the total area of the containing part 6 to the total area of the nonwoven fabric (sum of the total area of the containing part 6 and the non-containing part 7) is preferably 50% or less, and more preferably 40% or less. More preferably, it is 30% or less. Thereby, the region of the liquid film cleaving agent containing portion 6 that can be a factor of the liquid flow is moderately suppressed, and it is preferable that the liquid flow is hardly generated stably.
  • the ratio of the total area of the containing part 6 to the area of the whole nonwoven fabric is 5% or more from the viewpoint of maintaining the liquid film cleaving action as the whole nonwoven fabric. Preferably, it is 10% or more, more preferably 20% or more.
  • said total area can calculate as what is shown in the area of the whole nonwoven fabric that can define the magnitude
  • the length of the longitudinal direction may be set to 20 cm, and calculates an area from there.
  • the arrangement in which at least one of the containing part 6 and the non-containing part 7 is separated may be on the entire surface of the nonwoven fabric or on a part thereof.
  • the arrangement is preferably arranged at least at a position to be a liquid receiving part that directly receives the liquid on the surface of the nonwoven fabric.
  • a liquid receiving part means the part which receives excretion, when the nonwoven fabric 5 is used for an absorbent article as the name.
  • the liquid receiving part can be considered as a central portion in the longitudinal direction and the width direction of the paper diaper or the daytime napkin.
  • the liquid receiving portion is a central portion in the longitudinal direction and the width direction in the second region from the front when the night napkin is divided into four in the longitudinal direction.
  • front refers to a direction facing the abdomen of the wearer when the night napkin is worn. This is particularly effective from the viewpoint of liquid absorbency when the nonwoven fabric 5 is used as the top sheet of the absorbent article.
  • a portion where the array in which at least one of the containing part 6 and the non-containing part 7 is separated is in contact with the excretory part of the wearer (excretion It is preferable to be in the mouth facing portion.
  • the excretion opening facing portion varies depending on the use of the absorbent article. For example, in the sanitary napkin 100 with a wing as shown in FIG. 5, a leak-proof groove extending in the longitudinal direction from the position sandwiched by the wings 130 in the center position of the width of the top sheet 110 overlapping the absorbent body 120. A portion surrounded by 140 becomes the excretion opening facing portion 150.
  • the liquid film cleaving agent is preferably contained at least on the surface that receives the liquid in the thickness direction of the nonwoven fabric 5.
  • the surface sheet of the above example it is preferable that at least a liquid film cleaving agent is contained on the skin contact surface side that comes into contact with the wearer's skin.
  • the difference between the contact angle of the constituent fiber of the containing part 6 and the contact angle of the constituent fiber of the non-containing part 7 is that the higher the contact angle of the constituent fiber of the containing part 6 is, the more difficult it is to form a liquid film. From the viewpoint of liquid film formation inhibition, it is preferably 5 ° or more, more preferably 10 ° or more, and still more preferably 20 ° or more.
  • the difference in contact angle is preferably 60 degrees or less, more preferably 50 degrees or less, and still more preferably 40 degrees or less. By carrying out like this, it becomes what was excellent in the drawing property of the liquid from the surface of the nonwoven fabric 5 to the inside. In addition, said contact angle can be measured by the method mentioned later.
  • the contact angle of the constituent fibers of the non-containing part 7 is preferably 90 degrees or less, more preferably 80 degrees or less, and still more preferably 70 degrees or less. Thereby, the wettability of the fiber surface is moderately imparted, the liquid easily enters between the fibers, the liquid flow is easily suppressed, the wetted area increases, and the liquid film cleaving agent is easily transferred to the liquid film. Further, the contact angle of the constituent fibers of the containing portion 6 is preferably 110 degrees or less, more preferably 90 degrees or less, and still more preferably 80 degrees or less. Thereby, the slipperiness
  • the above contact angle can be measured by the following method. That is, a fiber is taken out from a predetermined part of the nonwoven fabric, and the contact angle of water with the fiber is measured.
  • a measuring device an automatic contact angle meter MCA-J manufactured by Kyowa Interface Science Co., Ltd. is used. Deionized water is used to measure the contact angle. The measurement is performed at a temperature of 25 degrees and a relative humidity (RH) of 65%.
  • the amount of liquid ejected from an ink jet type water droplet ejection part (manufactured by Cluster Technology Co., Ltd., pulse injector CTC-25 having a pore diameter of 25 ⁇ m) is set to 20 picoliters, and a water droplet is dropped just above the fiber.
  • the state of dripping is recorded on a high-speed recording device connected to a horizontally installed camera.
  • the recording device is preferably a personal computer incorporating a high-speed capture device from the viewpoint of image analysis or image analysis later.
  • an image is recorded every 17 msec.
  • the first image of water drops on the fiber taken out from the non-woven fabric is attached to the attached software FAMAS (software version is 2.6.2, analysis method is droplet method, analysis method is ⁇ / 2 method)
  • the image processing algorithm is non-reflective, the image processing image mode is frame, the threshold level is 200, and the curvature is not corrected). And the contact angle.
  • liquid film cleaving agent contained in the containing part of the nonwoven fabric according to the present invention will be described.
  • the liquid film cleaving agent of the first embodiment has an expansion coefficient of 15 mN / m or more for a liquid having a surface tension of 50 mN / m.
  • the compound which has the property of the liquid film cleaving agent of 1st Embodiment may be called compound C1.
  • the liquid film cleaving agent preferably has a water solubility of 0 g or more and 0.025 g or less.
  • the nonwoven fabric of 1st Embodiment contains the said liquid film cleaving agent.
  • the “expansion coefficient with respect to a liquid having a surface tension of 50 mN / m” possessed by the liquid film cleaving agent refers to an expansion coefficient with respect to a liquid assuming the above-mentioned excretion liquid such as menstrual blood or urine.
  • the “expansion coefficient” is a value obtained from a measurement value obtained by a measurement method described later in an environment region at a temperature of 25 ° C. and a relative humidity (RH) of 65% based on the following formula (1).
  • the liquid film in Formula (1) means a liquid phase of “a liquid having a surface tension of 50 mN / m”, and is a liquid in a state where a film is stretched between fibers or on a fiber surface, Includes both, also simply called liquid.
  • the surface tension in the formula (1) means an interfacial tension at the interface between the liquid film and the liquid film cleaving agent with the gas phase, and is distinct from the interfacial tension between the liquid phase and the liquid film cleaving agent. To do. This distinction applies to other descriptions in the present specification.
  • the expansion coefficient (S) of the liquid film cleaving agent increases as the surface tension ( ⁇ o ) of the liquid film cleaving agent decreases, and the interfacial tension of the liquid film cleaving agent with the liquid film It increases as ( ⁇ wo ) decreases.
  • the expansion coefficient is 15 mN / m or more, the liquid film cleaving agent has high mobility on the surface of the liquid film generated in a narrow region between fibers, that is, high diffusibility.
  • the expansion coefficient of the liquid film cleaving agent is more preferably 20 mN / m or more, further preferably 25 mN / m or more, and particularly preferably 30 mN / m or more.
  • the upper limit is not particularly limited, but when a liquid having a surface tension of 50 mN / m is used according to Equation (1), a liquid having an upper limit of 50 mN / m and a surface tension of 60 mN / m was used. In this case, when a liquid having an upper limit of 60 mN / m and a surface tension of 70 mN / m is used, the surface tension of the liquid forming the liquid film becomes an upper limit, such as 70 mN / m. Therefore, in the present invention, from the viewpoint of using a liquid having a surface tension of 50 mN / m, it is 50 mN / m or less.
  • the “water solubility” of the liquid film cleaving agent is a dissolvable mass (g) of the liquid film cleaving agent with respect to 100 g of deionized water. Based on the measurement method described later, the temperature is 25 ° C. and the relative humidity (RH) is 65. It is a value measured in the environmental area of%. When the water solubility is 0 g or more and 0.025 g or less, the liquid film cleaving agent is difficult to dissolve and forms an interface with the liquid film, thereby making the diffusibility more effective.
  • the water solubility of the liquid film cleaving agent is preferably 0.0025 g or less, more preferably 0.0017 g or less, and still more preferably less than 0.0001 g. Further, the water solubility is preferably as small as possible, and is 0 g or more. From the viewpoint of diffusibility into the liquid film, it is practical to set the water solubility to 1.0 ⁇ 10 ⁇ 9 g or more. In addition, it is thought that said water solubility is applicable also to the menstrual blood, urine, etc. which have a water
  • the surface tension ( ⁇ w ) of the liquid film (liquid having a surface tension of 50 mN / m), the surface tension ( ⁇ o ) of the liquid film cleaving agent, and the interfacial tension of the liquid film cleaving agent ( ⁇ wo )
  • the water solubility of the liquid film cleaving agent is measured by the following method.
  • the nonwoven fabric to be measured is a member (for example, a surface sheet) incorporated in an absorbent article such as a sanitary product or a disposable diaper, the measurement is taken out as follows.
  • the member to be measured is carefully peeled off and taken out.
  • This extraction method is applied in the measurement according to the nonwoven fabric of the present invention, such as measurement of the interfiber distance and the fineness described later.
  • a washing liquid such as hexane, methanol, ethanol, and the solvent used for the washing (including the liquid film cleaving agent). The washing solvent is dried and removed.
  • the mass of the substance taken out at this time is applied when calculating the content ratio (OPU) with respect to the fiber mass of the liquid film cleaving agent. If the amount of the extracted material is too small to measure the surface tension or interfacial tension, select an appropriate column and solvent according to the composition of the extracted material, and then fractionate each component by high performance liquid chromatography. Furthermore, the structure of each fraction is identified by performing MS measurement, NMR measurement, elemental analysis and the like for each fraction. When the liquid film cleaving agent contains a polymer compound, it becomes easier to identify the constituents by using a technique such as gel permeation chromatography (GPC) together.
  • GPC gel permeation chromatography
  • the substance is a commercial product, it is procured, and if it is not a commercial product, a sufficient amount is obtained by synthesis, and the surface tension and interfacial tension are measured.
  • the liquid film cleaving agent obtained as described above is a solid, the liquid film cleaving agent is heated to the melting point of the liquid film cleaving agent + 5 ° C. to cause a phase transition to the liquid. Perform measurement under the same conditions.
  • Measurement method of surface tension ( ⁇ w ) of liquid film (liquid) Measurement can be performed using a platinum plate by the plate method (Wilhelmy method) in an environmental region at a temperature of 25 ° C. and a relative humidity (RH) of 65%.
  • a measuring device at that time an automatic surface tension meter “CBVP-Z” (trade name, manufactured by Kyowa Interface Science Co., Ltd.) can be used.
  • a platinum plate having a purity of 99.9%, a size of 25 mm in width, and 10 mm in length is used.
  • liquid having a surface tension of 50 mN / m is a polyoxyethylene sorbitan monolaur, which is a nonionic surfactant, in deionized water using the above measurement method.
  • a solution adjusted to a surface tension of 50 ⁇ 1 mN / m by adding a rate (for example, trade name Leool Super TW-L120 manufactured by Kao Corporation) is used.
  • the interfacial tension when the drop is formed (at 0 second) is read.
  • the liquid film cleaving agent is heated to the melting point of the liquid film cleaving agent + 5 ° C. to cause a phase transition to the liquid, and the measurement is performed with the temperature condition.
  • the measurement is performed with the temperature condition.
  • the interfacial tension if the density difference between the liquid film cleaving agent and the liquid with a surface tension of 50 mN / m is very small, the viscosity is extremely high, or the interfacial tension value is below the pendant drop measurement limit, The interfacial tension measurement by the pendant drop method may be difficult.
  • the measurement can be performed by measuring by a spinning drop method in an environment region at a temperature of 25 ° C. and a relative humidity (RH) of 65%.
  • a spinning drop interfacial tensiometer manufactured by KRUSS, trade name SITE100
  • the interfacial tension when the drop shape is stabilized is read, and when the obtained liquid film cleaving agent is solid, it is heated to the melting point of the liquid film cleaving agent + 5 ° C. The phase is changed and the measurement is carried out with the temperature condition. Note that if the interfacial tension can be measured by both measuring devices, a smaller interfacial tension value is adopted as the measurement result.
  • dissolution means both monodisperse dissolution and micelle dispersion dissolution, and the amount of dissolution when floating, precipitation, precipitation, or cloudiness is observed is the water solubility. It becomes.
  • the liquid film cleaving agent of the present embodiment has the above expansion coefficient and water solubility, so that it spreads without dissolving on the surface of the liquid film and can displace the liquid film layer from the vicinity of the center of the liquid film. it can. As a result, the liquid film is destabilized and cleaved.
  • action in the nonwoven fabric of the liquid film cleaving agent of this embodiment is demonstrated concretely with reference to FIG.
  • a highly viscous liquid such as menstrual blood or excreted liquid such as urine tends to stretch the liquid film 2.
  • the liquid film cleaving agent destabilizes and breaks the liquid film in the following manner, inhibits formation, and promotes drainage from the nonwoven fabric.
  • the liquid film cleaving agent 3 included in the non-woven fiber 1 moves on the surface of the liquid film 2 while maintaining the interface with the liquid film 2.
  • the liquid film cleaving agent 3 pushes away a part of the liquid film 2 and penetrates in the thickness direction, as shown in FIGS. 7A3 and 7B3.
  • the liquid film 2 is gradually changed to a non-uniform and thin film.
  • the liquid film 2 is opened and cleaved so as to be repelled.
  • the cleaved menstrual fluid or the like becomes droplets and easily passes between the fibers of the nonwoven fabric, and the remaining liquid is reduced.
  • action with respect to the liquid film of said liquid film cleaving agent is similarly demonstrated not only to the case with respect to the liquid film between fibers but with respect to the liquid film clinging to the fiber surface. That is, the liquid film cleaving agent can move over the liquid film clinging to the fiber surface and push away a part of the liquid film to cleave the liquid film. In addition, the liquid film cleaving agent can cleave the liquid film with respect to the liquid film clinging to the fiber surface without moving at the position attached to the fiber, and can inhibit the formation of the liquid film.
  • the liquid film cleaving agent according to the present invention does not perform liquid modification such as lowering the surface tension of the liquid film, but cleaves and inhibits the liquid film itself generated between the fibers or on the fiber surface.
  • liquid modification such as lowering the surface tension of the liquid film
  • the liquid residue of a nonwoven fabric can be reduced.
  • the nonwoven fabric is incorporated in the absorbent article as a surface sheet, the retention of the liquid between the fibers is suppressed, and a liquid permeation path to the absorber is secured. Thereby, the liquid permeability increases, the liquid flow on the sheet surface is suppressed, and the liquid absorption rate increases.
  • the liquid film cleaving agent preferably further has an interface tension of 20 mN / m or less with respect to a liquid having a surface tension of 50 mN / m. That is, it is preferable that the “interfacial tension ( ⁇ wo ) of the liquid film cleaving agent with respect to the liquid film”, which is one variable for determining the value of the expansion coefficient (S) in the above-described mathematical formula (1), is 20 mN / m or less.
  • the “interfacial tension with respect to a liquid having a surface tension of 50 mN / m” of the liquid film cleaving agent is more preferably 17 mN / m or less, further preferably 13 mN / m or less, still more preferably 10 mN / m or less, and 9 mN.
  • the lower limit is not particularly limited, and may be larger than 0 mN / m from the viewpoint of insolubility in the liquid film. Note that when the interfacial tension is 0 mN / m, that is, when dissolved, an interface between the liquid film and the liquid film cleaving agent cannot be formed, so Equation (1) does not hold and the agent does not expand. As can be seen from the mathematical expression, the expansion coefficient changes depending on the surface tension of the target liquid.
  • the expansion coefficient is 50.8 mN / m.
  • the surface tension of the target liquid is 30 mN / m
  • the surface tension of the liquid film cleaving agent is 21 mN / m
  • the interfacial tension is 0.2 mN / m
  • the expansion coefficient is 8.8 mN / m.
  • the larger the expansion coefficient the greater the liquid film cleavage effect.
  • the numerical value at the surface tension of 50 mN / m is defined.
  • the surface tension of the liquid film cleaving agent is preferably 32 mN / m or less, more preferably 30 mN / m or less, further preferably 25 mN / m or less, and particularly preferably 22 mN / m or less. Moreover, the said surface tension is so good that it is small, and the minimum is not specifically limited. From the viewpoint of durability of the liquid film cleaving agent, 1 mN / m or more is practical. By setting the surface tension of the liquid film cleaving agent to be in the above range or less, even when the surface tension of the target liquid that stretches the liquid film is lowered, the liquid film cleaving action can be effectively exhibited.
  • the liquid film cleaving agent of the second embodiment has an expansion coefficient greater than 0 mN / m for a liquid with a surface tension of 50 mN / m, that is, a positive value, and an interfacial tension for a liquid with a surface tension of 50 mN / m is 20 mN. / M or less.
  • the compound having the properties of the liquid film cleaving agent of the second embodiment may be referred to as compound C2.
  • the liquid film cleaving agent preferably has a water solubility of 0 g or more and 0.025 g or less.
  • the nonwoven fabric of 2nd Embodiment contains the said liquid film cleaving agent.
  • the “interfacial tension with respect to a liquid having a surface tension of 50 mN / m” is 20 mN / m or less, it means that the diffusibility of the liquid film cleaving agent on the liquid film is increased as described above.
  • the expansion coefficient is relatively small such that the “expansion coefficient for a liquid having a surface tension of 50 mN / m” is less than 15 mN / m
  • many liquid film cleaving agents are removed from the fiber surface due to high diffusibility.
  • extension coefficient for a liquid having a surface tension of 50 mN / m is defined in the first embodiment.
  • the measuring method is also the same.
  • the “interfacial tension with respect to a liquid having a surface tension of 50 mN / m” is preferably 17 mN / m or less, and 13 mN / m or less. Is more preferably 10 mN / m or less, still more preferably 9 mN / m or less, and particularly preferably 1 mN / m or less.
  • the lower limit is not particularly limited as in the first embodiment, and is practically larger than 0 mN / m from the viewpoint of not dissolving in a liquid film (a liquid having a surface tension of 50 mN / m). .
  • the “expansion coefficient for a liquid having a surface tension of 50 mN / m” is preferably 9 mN / m or more, more preferably 10 mN / m or more from the viewpoint of making the action of the liquid film cleaving agent more effective. More preferably, it is 15 mN / m or more.
  • the upper limit in particular is not restrict
  • the nonwoven fabric containing the liquid film cleaving agent of the first embodiment and the nonwoven fabric containing the liquid film cleaving agent of the second embodiment further contain a phosphate ester type anionic surfactant.
  • a phosphate ester type anionic surfactant As a result, the hydrophilicity of the fiber surface is increased and the wettability is improved, so that the area where the liquid film and the liquid film cleaving agent are in contact with each other is increased, and blood and urine are surface-active having a phosphate group derived from a living body.
  • the content ratio of the liquid membrane cleaving agent to the phosphate ester type anionic surfactant is preferably 1: 1 to 19: 1 by mass ratio (liquid membrane cleaving agent: phosphate ester type anionic surfactant), 2: 1 to 15: 1 is more preferable, and 3: 1 to 10: 1 is still more preferable.
  • the content ratio is preferably 5: 1 to 19: 1, more preferably 8: 1 to 16: 1, and even more preferably 11: 1 to 13: 1 in terms of mass ratio.
  • the phosphate ester type anionic surfactant is not particularly limited.
  • specific examples thereof include alkyl ether phosphates, dialkyl phosphates, and alkyl phosphates.
  • alkyl phosphates are preferable from the viewpoint of enhancing the affinity with the liquid film and simultaneously imparting the workability of the nonwoven fabric.
  • Various alkyl ether phosphates can be used without particular limitation.
  • polyoxyalkylene stearyl ether phosphate examples include unsaturated carbon chains such as oxyalkylene oleyl ether phosphates and polyoxyalkylene palmitoleyl ether phosphates, and those having side chains in these carbon chains. More preferably, it is a completely neutralized or partially neutralized salt of a mono- or dipolyoxyalkylene alkyl ether phosphate ester having 16 to 18 carbon chains.
  • Examples of the polyoxyalkylene include polyoxyethylene, polyoxypropylene, polyoxybutylene and those obtained by copolymerizing these constituent monomers.
  • Examples of the salt of alkyl ether phosphate include alkali metals such as sodium and potassium, ammonia, and various amines. Alkyl ether phosphates can be used singly or in combination of two or more. Specific examples of the alkyl phosphate ester include those having a saturated carbon chain such as stearyl phosphate ester, myristyl phosphate ester, lauryl phosphate ester, palmityl phosphate ester, oleyl phosphate ester, palmitoleyl phosphate ester, etc.
  • Examples include unsaturated carbon chains and those having side chains in these carbon chains. More preferably, it is a completely neutralized or partially neutralized salt of a mono- or dialkyl phosphate ester having 16 to 18 carbon chains.
  • alkyl phosphate ester salt include alkali metals such as sodium and potassium, ammonia, and various amines.
  • Alkyl phosphate ester can be used individually by 1 type or in mixture of 2 or more types.
  • liquid film cleaving agent in the first embodiment and the second embodiment will be described. These are not soluble in water or have poor water-solubility because they are in the specific numerical range described above, and act to cleave the liquid film.
  • surfactants used as conventional fiber treatment agents are practically water-soluble when used by dissolving in water, and are not the liquid film cleaving agent of the present invention. .
  • the liquid film cleaving agent in the first embodiment and the second embodiment is preferably a compound having a mass average molecular weight of 500 or more.
  • This mass average molecular weight greatly affects the viscosity of the liquid film cleaving agent.
  • the liquid film cleaving agent keeps the viscosity high so that it does not easily flow off when the liquid passes between the fibers, and the liquid film cleaving effect in the nonwoven fabric can be maintained.
  • the mass average molecular weight of the liquid film cleavage agent is more preferably 1000 or more, further preferably 1500 or more, and particularly preferably 2000 or more.
  • the mass average molecular weight is measured using a gel permeation chromatograph (GPC) “CCPD” (trade name, manufactured by Tosoh Corporation). The measurement conditions are as follows. The calculated molecular weight is calculated with polystyrene. Separation column: GMHHR-H + GMHHR-H (cation) Eluent: L Farmin DM20 / CHCl3 Solvent flow rate: 1.0 ml / min Separation column temperature: 40 ° C
  • the liquid film cleaving agent in the first embodiment is preferably a compound having at least one structure selected from the group consisting of the following structures X, XY, and YXY, as will be described later.
  • Structure X is> C (A)- ⁇ C represents a carbon atom. ⁇ ,>, And-indicate a bond. The same applies hereinafter.
  • a hydrogen atom or —C (A) 3 , —C (A) 2 B, —C (A) (B) 2, —C (A) 2 —C (R 1 ) 3 , -C (R 1 ) 2 A, -C (R 1 ) 3 , -OSi (R 1 ) 3 , -OSi (R 1 ) 2 (R 2 ), -Si (R 1 ) 3 , -Si (R 1 ) 2 It has at least one group selected from the group consisting of (R 2 ).
  • R 1 and R 2 are each independently a hydrogen atom, an alkyl group (preferably having a carbon number of 1 to 20, preferably a methyl group, an ethyl group or a propyl group), an alkoxy group (having a carbon number of 1 to 20).
  • Preferred examples include various substituents such as a methoxy group and an ethoxy group, an aryl group (preferably having 6 to 20 carbon atoms, eg a phenyl group), and a halogen atom (eg a fluorine atom is preferred). Show.
  • a and B each independently represent a substituent containing an oxygen atom or a nitrogen atom, such as a hydroxyl group, a carboxylic acid group, an amino group, an amide group, an imino group, or a phenol group.
  • R 1 , R 2 , A, and B in the structure X may be the same as or different from each other.
  • a continuous bond between C (carbon atom) and Si is usually a single bond, but may include a double bond or a triple bond, and the bond between C and Si includes an ether group (- O-), amide group (—CONR A —: R A is a hydrogen atom or a monovalent group), ester group (—COO—), carbonyl group (—CO—), carbonate group (—OCOO—), etc. Groups may be included.
  • the number of one C and Si bonded to the other C or Si is 1 to 4, and a long-chain silicone chain (siloxane chain) or mixed chain is branched or has a radial structure. There may be cases.
  • Y represents a hydrophilic group having hydrophilicity including an atom selected from a hydrogen atom, a carbon atom, an oxygen atom, a nitrogen atom, a phosphorus atom, and a sulfur atom.
  • a polyoxyethylene (POE) group a polyoxyalkylene group, Propylene (POP) group is preferred
  • POP polyoxyethylene
  • sulfonic acid group sulfuric acid group
  • phosphoric acid group a polyoxyalkylene group
  • sulfobetaine group a polyoxyalkylene group
  • carbobetaine group a polyoxyalkylene group
  • phosphobetaine group a hydrophilic group
  • Y is plural, they may be the same or different. In structures XY and YXY, Y is attached to X or a terminal group of X.
  • the terminal group of X is bonded to Y by removing, for example, the same number of hydrogen atoms as the number of bonds to Y.
  • the hydrophilic groups Y, A, and B can be selected from the groups specifically described to satisfy the aforementioned expansion coefficient, water solubility, and interfacial tension.
  • the target liquid film cleavage effect is expressed.
  • the liquid film cleaving agent is preferably a compound in which the structure X is a siloxane structure. Furthermore, in the liquid film cleaving agent, as specific examples of the structures X, XY, and YXY, the structures represented by the following formulas (1) to (11) are arbitrarily combined from a siloxane chain. Is preferred. Furthermore, it is preferable from the viewpoint of the liquid film cleaving action that this compound has a mass average molecular weight in the above-mentioned range.
  • M 1 , L 1 , R 21 , and R 22 represent the following monovalent or polyvalent (divalent or higher) groups.
  • R 23 and R 24 represent the following monovalent or polyvalent (divalent or higher) group or a single bond.
  • M 1 is a group having a polyoxyethylene group, a polyoxypropylene group, a polyoxybutylene group, or a polyoxyalkylene group obtained by combining them, an erythritol group, a xylitol group, a sorbitol group, a glycerin group or an ethylene glycol group.
  • Hydrophilic groups having a plurality of hydroxyl groups hydrophilic groups formed by removing one hydrogen atom from the above compound having a plurality of hydroxyl groups such as erythritol), hydroxyl groups, carboxylic acid groups, mercapto groups, alkoxy groups (preferably having 1 to 20 carbon atoms) For example, a methoxy group is preferred), amino group, amide group, imino group, phenol group, sulfonic acid group, quaternary ammonium group, sulfobetaine group, hydroxysulfobetaine group, phosphobetaine group, imidazolium betaine group, carbobetaine.
  • M 1 is a polyvalent group
  • M 1 represents a group obtained by removing one or more hydrogen atoms from each of the above groups or functional groups.
  • L 1 is an ether group, an amino group (an amino group that can be taken as L 1 is represented by> NR C (R C is a hydrogen atom or a monovalent group)), an amide group, an ester group, a carbonyl group, The bonding group of a carbonate group is shown.
  • R 21 , R 22 , R 23 , and R 24 are each independently an alkyl group (preferably having 1 to 20 carbon atoms.
  • methyl group, ethyl group, propyl group, isopropyl group, butyl group, pentyl group, hexyl group) Group, heptyl group, 2-ethylhexyl group, nonyl group and decyl group are preferred
  • alkoxy group preferably having 1 to 20 carbon atoms, for example, preferably methoxy group and ethoxy group
  • aryl group having 6 to 6 carbon atoms.
  • R 20 is preferable, for example, a phenyl group is preferable), a fluoroalkyl group, an aralkyl group, a hydrocarbon group obtained by combining them, or a halogen atom (for example, a fluorine atom is preferable).
  • R ⁇ 22 > and R ⁇ 23 > are polyvalent groups
  • examples of the group that can be taken as R 22 or R 23 include an imino group that can be taken as R 32 in addition to the above groups, the hydrocarbon group, or the halogen atom. It is done.
  • the liquid film cleaving agent has a structure represented by any one of formulas (1), (2), (5) and (10) as X, and the end of X or the end of X and Y
  • a compound having a structure represented by any one of the above formulas other than these formulas is preferable.
  • X or a group consisting of X terminal and Y has a structure represented by any of the above formulas (2), (4), (5), (6), (8) and (9).
  • a compound composed of a siloxane chain having at least one is preferable.
  • organic surfactants that are silicone surfactants.
  • examples of the organic modified silicone modified with a reactive organic group include amino modified, epoxy modified, carboxy modified, diol modified, carbinol modified, (meth) acryl modified, mercapto modified, and phenol modified.
  • Organic modified silicones modified with non-reactive organic groups include polyether modified (including polyoxyalkylene modified), methylstyryl modified, long chain alkyl modified, higher fatty acid ester modified, higher alkoxy modified, higher fatty acid. Examples include modified and fluorine-modified ones.
  • the expansion coefficient exhibiting the above-mentioned liquid film cleavage action can be obtained.
  • long chain refers to those having 12 or more carbon atoms, preferably those having 12 to 20 carbon atoms.
  • “higher” means one having 6 or more carbon atoms, preferably 6 to 20 carbon atoms.
  • a modified silicone having a structure in which a liquid film cleaving agent that is a modified silicone has at least one oxygen atom in a modified group such as polyoxyalkylene-modified silicone, epoxy-modified silicone, carbinol-modified silicone, and diol-modified silicone is preferable.
  • polyoxyalkylene-modified silicone is preferred. Since the polyoxyalkylene-modified silicone has a polysiloxane chain, it hardly penetrates into the inside of the fiber and tends to remain on the surface.
  • the addition of a hydrophilic polyoxyalkylene chain is preferable because the affinity with water is increased and the interfacial tension is low, so that the movement on the surface of the liquid film is likely to occur.
  • the movement on the surface of the liquid film described above easily occurs.
  • the polyoxyalkylene-modified silicone is subjected to hot melt processing such as embossing, it tends to remain on the fiber surface at that portion, and the liquid film cleavage action is difficult to reduce.
  • the liquid film cleaving action is sufficiently exhibited at the embossed portion where the liquid tends to accumulate, which is preferable.
  • polyoxyalkylene-modified silicone examples include those represented by the following formulas [I] to [IV]. Furthermore, the polyoxyalkylene-modified silicone preferably has a mass average molecular weight within the above-mentioned range from the viewpoint of the liquid film cleavage action.
  • R 31 is an alkyl group (preferably having 1 to 20 carbon atoms. For example, methyl group, ethyl group, propyl group, isopropyl group, butyl group, pentyl group, hexyl group, heptyl group, 2-ethyl-hexyl group, Nonyl group and decyl group are preferred).
  • R 32 represents a single bond or an alkylene group (preferably having a carbon number of 1 to 20, for example, a methylene group, an ethylene group, a propylene group or a butylene group is preferred), and preferably represents the alkylene group.
  • the plurality of R 31 and the plurality of R 32 may be the same as or different from each other.
  • M 11 represents a group having a polyoxyalkylene group, and a polyoxyalkylene group is preferable.
  • the polyoxyalkylene group include a polyoxyethylene group, a polyoxypropylene group, a polyoxybutylene group, or a copolymer of these constituent monomers.
  • m and n are each independently an integer of 1 or more. The symbols of these repeating units are determined separately in each of the formulas (I) to (IV), and do not necessarily indicate the same integer and may be different.
  • the polyoxyalkylene-modified silicone may have one or both modified groups of polyoxyethylene-modified and polyoxypropylene-modified.
  • a methyl group in the alkyl group R 31 of the silicone chain is not particularly limited, and examples thereof include those described in paragraphs [0006] and [0012] of JP-A No. 2002-161474. More specifically, polyoxyethylene (POE) polyoxypropylene (POP) modified silicone, polyoxyethylene (POE) modified silicone, polyoxypropylene (POP) modified silicone and the like can be mentioned.
  • Examples of the POE-modified silicone include POE (3) -modified dimethyl silicone added with 3 moles of POE.
  • Examples of the POP-modified silicone include POP (10) -modified dimethyl silicone, POP (12) -modified dimethyl silicone, POP (24) -modified dimethyl silicone to which POP is added at 10 mol, 12 mol, or 24 mol.
  • the expansion coefficient and water solubility of the first embodiment described above are, for example, the number of added moles of a polyoxyalkylene group (an oxyalkylene group that forms a polyoxyalkylene group with respect to 1 mole of the polyoxyalkylene-modified silicone). ), The following modification rate, and the like.
  • the surface tension and the interfacial tension can also be set within predetermined ranges in the same manner. From the above viewpoint, those having an addition mole number of the polyoxyalkylene group of 1 or more are preferable.
  • the number of added moles is more preferably 3 or more, and further preferably 5 or more.
  • the number of added moles is preferably 30 or less, more preferably 20 or less, and still more preferably 10 or less. If the modification rate of the modified silicone is too low, the hydrophilicity is impaired, so that it is preferably 5% or more, more preferably 10% or more, and even more preferably 20% or more.
  • the modification rate of the modified silicone is the ratio of the number of repeating units of the modified siloxane bonding portion to the total number of repeating units of the siloxane bonding portion in one molecule of the modified silicone. For example, (n / m + n) ⁇ 100% in the above formulas [I] and [IV], (2 / m) ⁇ 100% in the formula [II], and (1 / m) in the formula [III]. ⁇ 100%.
  • the modified groups are water-soluble polyoxyethylene groups, water-insoluble polyoxypropylene groups, and polyoxybutylene groups, respectively.
  • the molecular weight of the water-insoluble silicone chain By changing the molecular weight of the water-insoluble silicone chain, introducing an amino group, an epoxy group, a carboxy group, a hydroxyl group, a carbinol group, etc. in addition to the polyoxyalkylene modification as the modifying group, etc. Can be set within the range.
  • the polyalkylene-modified silicone used as the liquid film cleaving agent is preferably contained in an amount of 0.02% by mass to 5% by mass with respect to the fiber mass (Oil Per Unit).
  • the content (OPU) of the polyalkylene-modified silicone is more preferably 1% by mass or less, and further preferably 0.4% by mass or less. By doing so, the tactile sensation of the nonwoven fabric becomes preferable.
  • the content ratio (OPU) is more preferably 0.04% by mass or more, and further preferably 0.1% by mass or more.
  • the fiber mass here means the fiber mass of the whole nonwoven fabric containing the containing part 6 and the non-containing part 7 (it is the same also in the content rate (OPU) demonstrated below).
  • the liquid film cleaving agent in the second embodiment is preferably a compound having at least one structure selected from the group consisting of the following structures Z, ZY, and YZY.
  • the structure Z includes:> C (A)- ⁇ C: carbon atom>, -C (A) 2- , -C (A) (B)-,> C (A) -C (R 3 ) ⁇ ,> C Any basic structure of (R 3 ) —, —C (R 3 ) (R 4 ) —, —C (R 3 ) 2 —,> C ⁇ is repeated, or two or more are combined Represents a hydrocarbon chain of structure.
  • R 3 and R 4 are each independently a hydrogen atom or an alkyl group (preferably having 1 to 20 carbon atoms.
  • methyl group, ethyl group, propyl group, isopropyl group, butyl group, pentyl group, hexyl group, heptyl Group, 2-ethyl-hexyl group, nonyl group and decyl group are preferable
  • alkoxy group preferably having 1 to 20 carbon atoms, for example, methoxy group and ethoxy group are preferable
  • aryl group having 6 to 20 carbon atoms.
  • Preferred examples thereof include a phenyl group.
  • a and B each independently represent a substituent containing an oxygen atom or a nitrogen atom, such as a hydroxyl group, a carboxylic acid group, an amino group, an amide group, an imino group, or a phenol group.
  • R 3 , R 4 , A, and B in the structure Z they may be the same as or different from each other.
  • the bond between successive C (carbon atoms) is usually a single bond, but may include a double bond or a triple bond, and the bond between C includes an ether group, an amide group, an ester group.
  • a linking group such as a carbonyl group or a carbonate group may be included.
  • Y represents a hydrophilic group having hydrophilicity including an atom selected from a hydrogen atom, a carbon atom, an oxygen atom, a nitrogen atom, a phosphorus atom, and a sulfur atom.
  • a hydroxyl group, a carboxylic acid group, an amino group, an amide group, an imino group, a phenol group; or a polyoxyalkylene group (the oxyalkylene group preferably has 1 to 4 carbon atoms.
  • a hydrophilic group such as a sulfonic acid group, a sulfuric acid group, a phosphoric acid group, a sulfobetaine group, a carbobetaine group, a phosphobetaine group, a quaternary ammonium group, an imidazolium betaine group, an epoxy group, a carbinol group, or a methacryl group;
  • Y When Y is plural, they may be the same or different.
  • Y is bonded to Z or a terminal group of Z.
  • the terminal group of Z is bonded to Y by removing, for example, the same number of hydrogen atoms as the number of bonds to Y.
  • the hydrophilic groups Y, A, and B can be selected from the groups specifically described to satisfy the aforementioned expansion coefficient, water solubility, and interfacial tension. Thus, the target liquid film cleavage effect is expressed.
  • the liquid film cleaving agent is preferably a compound in which the structures represented by the following formulas (12) to (25) are arbitrarily combined as specific examples of the structures Z, ZY, and YZY. . Furthermore, it is preferable from the viewpoint of the liquid film cleaving action that this compound has a mass average molecular weight in the above-mentioned range.
  • M 2 , L 2 , R 41 , R 42 , and R 43 represent the following monovalent or polyvalent groups (divalent or higher).
  • M 2 is a group having a polyoxyethylene group, a polyoxypropylene group, a polyoxybutylene group, or a polyoxyalkylene group in combination thereof, an erythritol group, a xylitol group, a sorbitol group, a glycerin group or an ethylene glycol group.
  • Hydrophilic groups having a plurality of hydroxyl groups, hydroxyl groups, carboxylic acid groups, mercapto groups, alkoxy groups (preferably having 1 to 20 carbon atoms, preferably methoxy groups), amino groups, amide groups, imino groups, phenol groups, sulfonic acids Group, quaternary ammonium group, sulfobetaine group, hydroxysulfobetaine group, phosphobetaine group, imidazolium betaine group, carbobetaine group, epoxy group, carbinol group, (meth) acryl group, or a functional group combining them. Show.
  • L 2 is an ether group, an amino group, an amide group, an ester group, a carbonyl group, a carbonate group, or a polyoxyethylene group, a polyoxypropylene group, a polyoxybutylene group, or a polyoxyalkylene group obtained by combining them.
  • the bonding group of is shown.
  • R 41 , R 42 , and R 43 are each independently a hydrogen atom or an alkyl group (preferably having 1 to 20 carbon atoms.
  • a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a pentyl group, a hexyl group) , A heptyl group, a 2-ethylhexyl group, a nonyl group and a decyl group are preferable, an alkoxy group (preferably having 1 to 20 carbon atoms, for example, a methoxy group and an ethoxy group are preferable), an aryl group (having 6 to 20 carbon atoms).
  • a phenyl group is preferable), a fluoroalkyl group, an aralkyl group, a hydrocarbon group obtained by combining them, or various substituents composed of a halogen atom (for example, a fluorine atom is preferable).
  • R 42 is a polyvalent group
  • R 42 is the above-described substituent, further showing a group obtained by removing one or more hydrogen atoms.
  • another structure may be arbitrarily connected to the tip of the bond described in each structure, or a hydrogen atom may be introduced.
  • polyether compounds and nonionic surfactants can be mentioned.
  • a polyoxyalkylene glycol represented by the formula (VI) having a mass average molecular weight of 1000 or more steareth, behenez
  • PPG Examples include myristyl ether, PPG stearyl ether, and PPG behenyl ether.
  • the polyoxyalkylene alkyl ether is preferably lauryl ether to which POP is added in an amount of 3 mol to 24 mol, preferably 5 mol.
  • polypropylene glycol having a weight average molecular weight of 1000 to 10,000, preferably 3000, to which polypropylene glycol is added in an amount of 17 to 180 mol, preferably about 50 mol, is preferable.
  • the measurement of said mass mean molecular weight can be performed with the measuring method mentioned above.
  • the polyether compound and the nonionic surfactant are preferably contained in an amount of 0.1% by mass or more and 5% by mass or less as a content ratio to the fiber mass (Oil Per Unit).
  • the content ratio (OPU) of the polyether compound or nonionic surfactant is more preferably 1% by mass or less, and further preferably 0.4% by mass or less. By doing so, the tactile sensation of the nonwoven fabric becomes preferable.
  • the content ratio (OPU) is more preferably 0.15% by mass or more, and further 0.2% by mass or more. preferable.
  • L 21 represents an ether group, an amino group, an amide group, an ester group, a carbonyl group, a carbonate group, a polyoxyethylene group, a polyoxypropylene group, a polyoxybutylene group, or a polyoxyalkylene group obtained by combining them
  • a linking group such as R 51 is a hydrogen atom, methyl group, ethyl group, propyl group, isopropyl group, butyl group, pentyl group, hexyl group, heptyl group, 2-ethylhexyl group, nonyl group, decyl group, methoxy group, ethoxy group, phenyl group , A fluoroalkyl group, an aralkyl group, a hydrocarbon group obtained by combining them, or various substituents composed of a fluorine atom.
  • A, b, m and n are each independently an integer of 1 or more.
  • the number of carbon atoms and the number of hydrogen atoms are determined independently in each of the formulas (V) and (VI), and do not necessarily indicate the same integer, and may be different.
  • “m” in — (C a H b O) m — is an integer of 1 or more.
  • the value of this repeating unit is determined independently in each of the formulas (V) and (VI), and does not necessarily indicate the same integer, and may be different.
  • the expansion coefficient, surface tension, and water solubility of the second embodiment described above can be set within a predetermined range, for example, depending on the number of moles of the polyoxyalkylene group in the polyether compound or nonionic surfactant.
  • the number of moles of the polyoxyalkylene group is preferably 1 or more and 70 or less. By setting it to 1 or more, the above-mentioned liquid film cleavage action is sufficiently exhibited.
  • the number of moles is more preferably 5 or more, and even more preferably 7 or more.
  • the added mole number is preferably 70 or less, more preferably 60 or less, and still more preferably 50 or less.
  • the entanglement of the molecular chain becomes moderately weak, and the diffusibility in the liquid film is excellent, which is preferable.
  • the expansion coefficient, surface tension, interfacial tension and water solubility described above are the same for water-soluble polyoxyethylene groups, water-insoluble polyoxypropylene groups and polyoxybutylene groups in polyether compounds and nonionic surfactants, respectively.
  • Use in combination change the chain length of the hydrocarbon chain, use a hydrocarbon chain having a branched chain, use a hydrocarbon chain having a double bond, benzene ring or naphthalene in the hydrocarbon chain It can be set within a predetermined range by using one having a ring or by appropriately combining the above.
  • hydrocarbon compounds having 5 or more carbon atoms can be mentioned.
  • the number of carbon atoms is preferably 100 or less, more preferably 50 or less, from the viewpoint that the liquid is more easily expanded to the liquid film surface.
  • This hydrocarbon compound excludes polyorganosiloxane, and is not limited to a straight chain, but may be a branched chain, and the chain is not particularly limited to saturated or unsaturated.
  • This hydrocarbon compound is preferably contained in an amount of 0.1% by mass or more and 5% by mass or less as a content ratio to the fiber mass (Oil Per Unit).
  • the content ratio (OPU) of the hydrocarbon compound is preferably 1% by mass or less, more preferably 0.99% by mass or less, and still more preferably 0.4% by mass or less. By doing so, the tactile sensation of the nonwoven fabric becomes preferable. Further, from the viewpoint of sufficiently exhibiting the liquid film cleavage effect due to the content of the hydrocarbon compound, the content (OPU) is more preferably 0.15% by mass or more, and further preferably 0.2% by mass or more.
  • Hydrocarbon compounds include oils or fats, such as natural oils or natural fats. Specific examples include coconut oil, camellia oil, castor oil, coconut oil, corn oil, olive oil, sunflower oil, tall oil, and mixtures thereof. Moreover, the fatty acids as represented by Formula (VII), such as caprylic acid, capric acid, oleic acid, lauric acid, palmitic acid, stearic acid, myristic acid, behenic acid, and mixtures thereof, can be mentioned.
  • oils or fats such as natural oils or natural fats. Specific examples include coconut oil, camellia oil, castor oil, coconut oil, corn oil, olive oil, sunflower oil, tall oil, and mixtures thereof.
  • the fatty acids as represented by Formula (VII) such as caprylic acid, capric acid, oleic acid, lauric acid, palmitic acid, stearic acid, myristic acid, behenic acid, and mixtures thereof, can be mentioned.
  • n and n are each independently an integer of 1 or more.
  • C m H n is a hydrocarbon group of each of the above fatty acids.
  • linear or branched, saturated or unsaturated, substituted or unsubstituted polyhydric alcohol fatty acid esters or mixtures of polyhydric alcohol fatty acid esters as represented by formula (VIII-I) or (VIII-II)
  • examples thereof include glycerin fatty acid esters and pentaerythritol fatty acid esters, and specific examples include glyceryl tricaprylate, glyceryl tripalmitate, and mixtures thereof.
  • the mixture of glycerin fatty acid ester and pentaerythritol fatty acid ester typically contains some mono-, di-, and triesters.
  • glycerin fatty acid ester examples include glyceryl tricaprylate, a mixture of glyceryl tricapryate, and the like. Also, from the viewpoint of reducing the interfacial tension and obtaining a higher expansion coefficient, a polyhydric alcohol fatty acid ester having a polyoxyalkylene group introduced to such an extent that water insolubility can be maintained may be used.
  • m, m ′, m ′′, n, n ′, and n ′′ are each independently an integer of 1 or more.
  • the plurality of m and the plurality of n may be the same as or different from each other.
  • C m H n, C m 'H n' and C m '' H n '' are each a hydrocarbon group of each of the fatty acid.
  • fatty acids or fatty acid mixtures in which linear or branched, saturated or unsaturated fatty acids form esters with polyols having a large number of hydroxyl groups, and some of the hydroxyl groups remain unesterified are represented by the formula ( IX), a glycerin fatty acid ester, a sorbitan fatty acid ester, and a partially esterified product of pentaerythritol fatty acid ester represented by any one of formula (X) or formula (XI).
  • a mixture composed of partially esterified products such as glycerin fatty acid ester, sorbitan fatty acid ester, and pentaerythritol fatty acid ester typically contains some fully esterified compound.
  • m and n are each independently an integer of 1 or more.
  • the plurality of m and the plurality of n may be the same as or different from each other.
  • C m H n is a hydrocarbon group of each of the above fatty acids.
  • R 52 represents a linear or branched, saturated or unsaturated hydrocarbon group (an alkyl group, an alkenyl group, an alkynyl group, or the like) having 2 to 22 carbon atoms. Specific examples include 2-ethylhexyl group, lauryl group, myristyl group, palmityl group, stearyl group, behenyl group, oleyl group, linole group and the like.
  • m and n are each independently an integer of 1 or more.
  • the plurality of m and the plurality of n may be the same as or different from each other.
  • C m H n is a hydrocarbon group of each of the above fatty acids.
  • sterols can be mentioned.
  • Specific examples include cholesterol, sitosterol, stigmasterol, ergosterol, and mixtures thereof having a sterol structure of the formula (XII).
  • alcohols include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, cetostearyl alcohol, behenyl alcohol, and mixtures thereof as represented by formula (XIII).
  • n and n are each independently an integer of 1 or more.
  • C m H n is a hydrocarbon group of each of the above alcohol.
  • fatty acid ester examples include isopropyl myristate, isopropyl palmitate, cetylethylhexanoate, triethylhexanoin, octyldodecyl myristate, ethylhexyl palmitate, ethylhexyl stearate, butyl stearate represented by the formula (XIV). Rate, myristyl myristate, stearyl stearate, cholesteryl isostearate and mixtures thereof.
  • m and n are each independently an integer of 1 or more.
  • two C m H n may be the same or different.
  • C m H n -COO- of C m H n is a hydrocarbon group of each of the above fatty acids.
  • C m H n in —COOC m H n represents an alcohol-derived hydrocarbon group that forms an ester.
  • wax examples include ceresin, paraffin, petrolatum, mineral oil, liquid isoparaffin, and the like represented by the formula (XV).
  • n and n are each independently an integer of 1 or more.
  • the expansion coefficient, surface tension, water solubility, and interfacial tension of the second embodiment described above can maintain, for example, a hydrophilic polyoxyethylene group in water-insoluble in the above-described hydrocarbon compound having 5 or more carbon atoms.
  • liquid film cleaving agent in addition to the above-described liquid film cleaving agent, other components may be included as necessary. Moreover, you may use the liquid film cleaving agent of 1st Embodiment, and the liquid film cleaving agent of 2nd Embodiment combining both agents other than the form used separately. This also applies to the first compound and the second compound in the liquid film cleaving agent of the second embodiment.
  • the surface tension of the liquid film (liquid having a surface tension of 50 mN / m) (The identification method described in the measurement method such as [gamma] w) can be used.
  • the component of the liquid film cleaving agent is a compound having a siloxane chain in the main chain or a hydrocarbon compound having 1 to 20 carbon atoms
  • the content ratio (OPU) relative to the fiber mass is determined by the above-described analysis method. Based on the mass of the obtained substance, it can be determined by dividing the content of the liquid film cleaving agent by the mass of the fiber.
  • the nonwoven fabric according to the present invention has high liquid permeability regardless of the thickness of the fiber and the distance between the fibers.
  • the nonwoven fabric of the present invention is particularly effective when thin fibers are used.
  • the distance between the fibers decreases, and the narrow area between the fibers increases.
  • the distance between fibers is 120 ⁇ m, and the formed liquid film area ratio is about 2.6%.
  • the distance between the fibers is 85 ⁇ m, and the liquid film area ratio is about 7.8%, which is about three times that of a normal nonwoven fabric.
  • the liquid film cleaving agent according to the present invention reliably cleaves the liquid film that occurs frequently and reduces the liquid residue.
  • the liquid film area ratio is a liquid film area ratio calculated by image analysis from the nonwoven fabric surface, and has a strong correlation with the liquid remaining state on the outermost surface of the surface material. Therefore, when the liquid film area ratio decreases, the liquid in the vicinity of the skin is removed, the comfort after excretion is increased, and the absorbent article is comfortable to wear after excretion.
  • the liquid remaining amount mentioned later means the liquid amount currently hold
  • the whiteness of the surface is expressed as an L value described later.
  • the L value tends to decrease the remaining liquid amount and increase the numerical value due to the tearing of the liquid film on the surface, and whiteness tends to stand out visually.
  • the nonwoven fabric containing the liquid film cleaving agent according to the present invention can reduce the liquid film area ratio and the remaining amount of liquid even if the fiber is thinned, and can increase the L value. Therefore, the soft touch by thinning the fiber and the dry feeling And at a high level.
  • the nonwoven fabric according to the present invention as a constituent member such as a surface material of an absorbent article, the dry feeling at the part that touches the skin is high, and stains due to body fluids are not noticeable due to visual whiteness.
  • the distance between the fibers of the nonwoven fabric is preferably 150 ⁇ m or less, and more preferably 90 ⁇ m or less, from the viewpoint of increasing the softness of the touch.
  • the lower limit is preferably 50 ⁇ m or more, and more preferably 70 ⁇ m or more, from the viewpoint of suppressing the liquid permeability from being impaired due to excessive narrowing between fibers. Specifically, 50 ⁇ m or more and 150 ⁇ m or less is preferable, and 70 ⁇ m or more and 90 ⁇ m or less is more preferable.
  • the fineness of the fiber is preferably 3.3 dtex or less, and more preferably 2.4 dtex or less.
  • the lower limit is preferably 0.5 dtex or more, and more preferably 1 dtex or more. Specifically, it is preferably 0.5 dtex or more and 3.3 dtex or less, and more preferably 1 dtex or more and 2.4 dtex or less.
  • the interfiber distance is obtained by measuring the thickness of the nonwoven fabric to be measured as follows and applying it to the following formula (2). First, the nonwoven fabric to be measured is cut into a longitudinal direction of 50 mm and a width direction of 50 mm to produce a cut piece of the nonwoven fabric. If you cannot obtain a cut piece of this size, such as when the nonwoven fabric to be measured is incorporated in absorbent articles such as sanitary products and disposable diapers, cut the cut piece to the maximum size that can be obtained. Is made. The thickness of this cut piece is measured with a pressure of 49 Pa.
  • the measurement environment is a temperature of 20 ⁇ 2 ° C., the relative humidity is 65 ⁇ 5%, and the measurement instrument is a microscope (VHX-1000 manufactured by Keyence Corporation).
  • the boundary is determined from the fiber diameter, and the thickness is calculated.
  • the inter-fiber distance of the fibers constituting the nonwoven fabric to be measured is determined by the following formula based on Wrotnowski's assumption.
  • An expression based on the assumption of Wrotnowski is generally used when determining the inter-fiber distance of the fibers constituting the nonwoven fabric.
  • the interfiber distance A ( ⁇ m) is the thickness h (mm) of the nonwoven fabric, the basis weight e (g / m 2 ), the fiber diameter d ( ⁇ m) of the fibers constituting the nonwoven fabric, It is calculated
  • the fiber diameter d ( ⁇ m) is measured using a scanning electron microscope (DSC6200, manufactured by Seiko Instruments Inc.), 10 fiber cross-sections, and the average value is defined as the fiber diameter.
  • the fiber density ⁇ (g / cm 3 ) is measured according to the measuring method of the density gradient tube method described in JIS L1015 chemical fiber staple test method using a density gradient tube.
  • the cross-sectional shape of the fiber is measured with an electron microscope or the like, and the cross-sectional area of the fiber (the cross-sectional area of each resin component in a fiber formed of a plurality of resins) is measured, and the resin is measured with a DSC (differential thermal analyzer). Is specified (in the case of multiple resins, the approximate component ratio is also), the specific gravity is determined, and the fineness is calculated.
  • the cross section is first observed and the cross sectional area is calculated. Then, by measuring with DSC, it is comprised from single component resin from melting
  • fibers constituting the nonwoven fabric according to the present invention those usually used for this type of article can be employed without any particular limitation.
  • various materials such as heat-fusible core-sheath composite fiber, heat-extensible fiber, non-heat-extensible fiber, heat-shrinkable fiber, non-heat-shrinkable fiber, three-dimensional crimped fiber, latent crimped fiber, hollow fiber, etc. Mention may be made of fibers.
  • a non-heat-extensible fiber and a non-heat-shrinkable fiber are heat-fusible.
  • the core-sheath type composite fiber may be a concentric core-sheath type, an eccentric core-sheath type, a side-by-side type, or an irregular shape, and is preferably a concentric core-sheath type.
  • the liquid film cleaving agent, or the liquid film cleaving agent and the phosphate type anionic surfactant may be contained in the fiber in any step.
  • a fiber film cleaving agent or a mixture of a liquid film cleaving agent and a phosphoric acid type anionic surfactant may be blended and applied to a fiber spinning oil that is usually used for fiber spinning.
  • a liquid film cleaving agent or a mixture of a liquid film cleaving agent and a phosphoric acid type anionic surfactant may be blended and applied to the finishing oil.
  • a liquid film cleaving agent or a phosphate ester type anionic surfactant may be blended with a fiber treatment agent usually used in the production of nonwoven fabrics, and may be applied to the fibers, or may be applied after forming into a nonwoven fabric.
  • the nonwoven fabric according to the present invention contains a liquid film cleaving agent or a phosphate ester type anionic surfactant, it is excellent in liquid residue suppression corresponding to various fiber structures. Therefore, even when a large amount of liquid is applied to the nonwoven fabric, a liquid passage between the fibers is always ensured and the liquid permeability is excellent. Thereby, a various function can be added to a nonwoven fabric, without being restrict
  • it may be composed of one layer or may be composed of two or more layers.
  • the shape of a nonwoven fabric may be flat, the one side or both sides may be uneven, and the basis weight or density of the fiber may be variously changed.
  • the liquid film cleaving agent can be contained in the pattern shown in FIGS. 1 to 4 or any other pattern.
  • the surface liquid flow of a film sheet having no voids on the surface and a nonwoven sheet having voids is compared, if the entire sheet is hydrophilic, the nonwoven sheet is more hydrophilic as a whole sheet Performance is exhibited and the liquid flow is shorter than the film sheet.
  • the whole sheet is hydrophobic, the nonwoven fabric sheet exhibits more hydrophobic performance as the whole sheet, and the liquid flow becomes longer than the film sheet.
  • a part can be arranged. At this time, a pattern in which the top part of the convex part has the inclusion part, a pattern in which the bottom part of the concave part has the non-contained part, the convex part and the inclusion part match, the concave part and the non-contained part, There are patterns that match. Thereby, even if it is an uneven
  • this coating pattern is also used from the viewpoint of the production method because the convex portion comes into contact with the printing roll when a liquid film cleaving agent is applied to a nonwoven fabric having an uneven shape by a printing method such as a flexographic printing method. preferable.
  • the pattern of the containing part of the nonwoven fabric shown in FIGS. 8 to 10 is the same as or similar to that in FIG.
  • the pattern of the containing portion of the nonwoven fabric shown in FIGS. 11 to 13 is the same as or similar to that of FIG. 3
  • the pattern of the containing portion of the nonwoven fabric shown in FIG. 15 is the same or similar to that of FIG. Become.
  • the nonwoven fabric which concerns on this invention is excellent in liquid permeability by the effect
  • the range of choices also spreads about a combination with an absorber.
  • the liquid film cleaving agent in case the nonwoven fabric which concerns on this invention consists of multiple layers may be contained in all the layers, and may be contained in part. It is preferably contained in at least the layer on the side that directly receives the liquid.
  • a liquid film cleaving agent is contained in at least the layer on the skin contact surface side.
  • the liquid film cleaving agent is localized in the vicinity of at least some of the fiber entanglement points or the fiber fusion points.
  • the “localization” of the liquid film cleaving agent here is not a state in which the liquid film cleaving agent uniformly adheres to the entire surface of the fibers constituting the nonwoven fabric, but near the fiber entanglement point or fiber fusion point rather than the surface of each fiber. A state in which it is attached in the vicinity of the landing point. Specifically, it can be defined that the concentration of the liquid film cleaving agent near the entanglement point or the fusion point is higher than the fiber surface (the fiber surface between the entanglement points or between the fusion points).
  • the liquid film cleaving agent present near the fiber entanglement point or near the fiber fusion point may be attached so as to partially cover the space between the fibers around the fiber entanglement point or fiber fusion point.
  • concentration of the liquid film cleaving agent near the confounding point or the fusion point the better.
  • the concentration varies depending on the type of liquid film cleaving agent used, the type of fiber used, the ratio of active ingredients when mixed with other agents, etc., but is not uniquely determined. It can be determined as appropriate from the standpoint of exhibiting. Due to the localization of the liquid film cleaving agent, the liquid film cleaving action is more easily expressed.
  • the vicinity of the fiber entanglement point or the vicinity of the fiber fusion point is a place where a liquid film is particularly likely to be formed. Therefore, the presence of more liquid film cleaving agent at that place makes it easier to act directly on the liquid film.
  • the localization of the liquid film cleaving agent is preferably generated at 30% or more near the fiber entanglement point or near the fiber fusion point of the whole nonwoven fabric, more preferably 40% or more, and more preferably 50%. It is more preferable that it occurs at% or more.
  • the distance between fiber entanglement points or fiber fusion points is relatively short, the space between the fibers is small, and a liquid film is particularly likely to occur.
  • the liquid film cleaving agent is selectively localized near the fiber intersection or the fiber fusion point where the space between the fibers is small because the liquid film cleaving action is effectively exhibited.
  • the liquid film cleaving agent increases the coverage of a relatively small interfiber space and decreases the coverage of a relatively large interfiber space.
  • the “relatively small inter-fiber space” refers to an inter-fiber space having a fiber-to-fiber distance of 1/2 or less with respect to the inter-fiber distance determined by the above-described (inter-fiber distance measurement method).
  • the localized state of the liquid film cleaving agent can be confirmed by the following method. First, a nonwoven fabric is cut into 5 mm x 5 mm, and it attaches to a sample stand using a carbon tape. The sample stage is placed in a scanning electron microscope (S4300SE / N, manufactured by Hitachi, Ltd.) in an undeposited state, and is brought to a low vacuum or a vacuum state. Since detection is performed using an annular backscattered electron detector (accessory), the larger the atomic number, the easier it is to emit backscattered electrons. Therefore, polyethylene (PE), polypropylene (PP), and polyester (PET) are mainly used.
  • PE polyethylene
  • PP polypropylene
  • PET polyester
  • the localization state can be confirmed by whiteness.
  • the whiteness increases as the atomic number increases or the amount of adhesion increases.
  • a method usually used for this type of article can be adopted.
  • a card method, an airlaid method, a spunbond method, or the like can be used as a method for forming a fiber web.
  • various commonly used non-woven fabric methods such as spunlace, needle punch, chemical bond, and dot embossing can be adopted.
  • an air-through nonwoven fabric and a spunbonded nonwoven fabric are preferable.
  • the “air-through nonwoven fabric” as used herein refers to a nonwoven fabric produced through a process (air-through treatment process) in which a fluid of 50 ° C.
  • the “spunbond nonwoven fabric” refers to a laminated nonwoven fabric manufactured by a spunbond method. This means not only non-woven fabrics produced only in this step, but also non-woven fabrics produced by adding this step to non-woven fabrics produced by other methods or non-woven fabrics produced by performing some steps after this step.
  • the nonwoven fabric of this invention is not restricted to what consists only of an air through nonwoven fabric and a spun bond nonwoven fabric, The air through nonwoven fabric and what combined the fiber sheet and film materials, such as a spun bond nonwoven fabric and another nonwoven fabric, are included.
  • a method of immersing the raw material nonwoven fabric in a solution containing the liquid film cleaving agent can be mentioned.
  • the solution include a solution obtained by diluting a liquid film cleaving agent with a solvent (hereinafter, this solution is also referred to as a liquid film cleaving agent solution).
  • the solvent to be diluted include alcohols such as ethanol.
  • unit or the solution containing the said liquid film cleaving agent with respect to a raw material nonwoven fabric is mentioned.
  • a phosphate ester type anionic surfactant may be mixed in the solution containing the liquid film cleaving agent.
  • the content ratio of the liquid film cleaving agent and the phosphate ester type anionic surfactant is preferably as described above.
  • the solvent there can be used any solvent that can dissolve and disperse a liquid film cleaving agent having an extremely low water solubility in a solvent in an appropriate amount so that it can be easily applied to a non-woven fabric.
  • a raw material nonwoven fabric means the thing before apply
  • those used for the nonwoven fabric manufacturing method can be employed without any particular limitation.
  • application by spraying, application by slot coater, application by gravure method, flexo method, dipping method and the like can be mentioned.
  • a coating method is more preferable.
  • the flexo coating method is particularly preferable from the viewpoint of clarifying the localization of the liquid film cleaving agent.
  • a various nonwoven fabric can be especially used without a restriction
  • the fiber entanglement point is heat-sealed or thermocompression bonded, and the non-woven fabric obtained by thermally bonding fibers by air-through treatment or heat embossing as described above It is more preferable to use
  • the liquid film cleaving agent When the liquid film cleaving agent is attached to the fiber, it is preferably used as a fiber treatment agent containing the liquid film cleaving agent.
  • the “fiber treatment agent” described here means that an oily liquid film cleaving agent having extremely low water solubility is easily applied to a raw material nonwoven fabric or fiber by emulsifying with water and a surfactant. This is what is in a state.
  • the content ratio of the liquid film cleaving agent is preferably 50% by mass or less with respect to the mass of the fiber treatment agent. Thereby, the fiber treatment agent can be made into the state which emulsified stably the liquid film cleaving agent used as an oily component in a solvent.
  • the content ratio of the liquid film cleaving agent is more preferably 40% by mass or less, and further preferably 30% by mass or less with respect to the mass of the fiber treatment agent. Moreover, it is preferable to set it as said content rate from a viewpoint which a liquid film cleaving agent moves on a fiber with a moderate viscosity after coating, and implement
  • the content ratio of the liquid film cleaving agent is preferably 5% by mass or more, more preferably 15% by mass or more, and further preferably 25% by mass or more with respect to the mass of the fiber treatment agent from the viewpoint of expressing a sufficient liquid film cleavage effect. preferable.
  • the fiber processing agent containing a liquid film cleaving agent may contain another agent in the range which does not inhibit the effect
  • the phosphate ester type anionic surfactant described above may be included.
  • the content ratio of the liquid film cleaving agent and the phosphate ester type anionic surfactant is preferably as described above.
  • it may contain an antistatic agent or anti-friction agent used in fiber processing, a hydrophilizing agent imparting moderate hydrophilicity to the nonwoven fabric, an emulsifying agent imparting emulsification stability, and the like.
  • the nonwoven fabric 10 shown in FIG. 8 is composed of two layers, an upper layer 11 on the upper surface 1A (skin contact surface when a surface sheet is used) side and a lower layer 12 on the lower surface 1B (non-skin contact surface when a surface sheet is used) side. Become. Further, embossing (squeezing) is performed in the thickness direction from the upper surface 1A, and the two layers are joined (the embossed part is referred to as an embossed recess (concave joint) 13).
  • the lower layer 12 is a layer in which heat shrinkage of the heat-shrinkable fiber is expressed.
  • the upper layer 11 is a layer containing non-heat-shrinkable fibers, and the non-heat-shrinkable fibers are partially bonded by the concave bonding portion 13.
  • Non-heat-shrinkable fibers are not limited to those that do not shrink at all, but include those that shrink to such an extent that the heat-shrinkable fibers of the lower layer 12 are not inhibited.
  • a non-heat-shrinkable heat-fusible fiber is preferable from the viewpoint of forming a nonwoven fabric by heat.
  • the nonwoven fabric 10 can be manufactured by, for example, the materials and manufacturing methods described in paragraphs [0032] to [0048] of JP-A-2002-187228.
  • this manufacturing for example, after embossing the upper layer 11 and the lower layer 12 from the upper layer side 11, the heat-shrinkable fibers are thermally contracted by heat treatment. At this time, the embossed portions adjacent to each other are pulled by the contraction of the fibers, and the interval between the embossed portions is reduced. Due to this deformation, the fibers of the upper layer 11 protrude from the embossed concave portion 13 toward the upper surface 1 ⁇ / b> A to form a convex portion 14.
  • the upper layer is laminated in a state where the lower layer 12 in which the heat shrinkage is developed is stretched, and the above-described embossing is performed. Thereafter, when the extended state of the lower layer 12 is released, the upper layer 11 side rises to the upper surface 1A side, and the convex portion 14 is formed.
  • This embossing can be performed by a commonly used method such as heat embossing or ultrasonic embossing.
  • a joining method using an adhesive may be used.
  • the upper layer 11 is squeezed and joined to the lower layer side 12 in the embossed recess (concave joint) 13.
  • the embossed recesses 13 are formed in the form of dots in the plane direction of the nonwoven fabric 10, and the portion surrounded by the embossed recesses 13 is the above-described convex portion 14 in which the upper layer 11 is raised.
  • the convex part 14 is a three-dimensional solid shape, for example, has a dome shape.
  • the fiber is in a rougher state than the lower layer 12.
  • the inside of the convex part 14 may be filled with fibers as shown in FIG. 8 or may have a hollow part formed by separating the upper layer 11 and the lower layer 12.
  • Arrangement of the embossed concave portion 13 and the convex portion 14 can be arbitrary, and may be a lattice arrangement, for example.
  • Examples of the lattice arrangement include an arrangement in which a plurality of rows each including a plurality of embossed recesses 13 are arranged, and the embossed recesses 13 in each row are shifted by an anti-pitch between adjacent rows.
  • the embossed recess 13 when the embossed recess 13 is viewed in a plan view, the embossed recess 13 may be a dot, a circle, an ellipse, a triangle, a rectangle, or another polygon, and can be arbitrarily set as appropriate. Further, the embossed recess 13 may be linear in addition to the dot shape.
  • the nonwoven fabric 10 Since the nonwoven fabric 10 has an uneven surface having the convex portion 14 and the embossed concave portion 13 on the upper surface 1A side, the nonwoven fabric 10 is excellent in shape recoverability when stretched in the plane direction and compression deformability when compressed in the thickness direction. . Moreover, it becomes a comparatively bulky nonwoven fabric by the protrusion of the fibers of the upper layer 11 as described above. Thereby, the user who touched the nonwoven fabric 10 can feel a soft gentle touch. Further, in an absorbent article in which the nonwoven fabric 10 is incorporated as a surface sheet having the upper surface 10A as the skin contact surface and the lower surface 1B as the non-skin contact surface, the skin contact surface side is uneven with the convex portions 14 and the embossed concave portions 13.
  • the nonwoven fabric 10 has less liquid residue due to the action of the liquid film cleaving agent described above or the cooperative action of the liquid film cleaving agent and the phosphate ester type anionic surfactant. Thereby, the liquid permeability using the uneven
  • the nonwoven fabric 10 is not restricted to the two-layer structure of the upper layer 11 and the lower layer 12, and may have another layer.
  • a single layer or a plurality of layers may be disposed between the upper layer 11 and the lower layer 12, and a single layer or a plurality of layers may be disposed on the upper surface 10A side and the lower surface 10B side of the nonwoven fabric 10.
  • This single layer or multiple layers may be a layer having heat-shrinkable fibers or a layer having non-heat-shrinkable fibers.
  • Nonwoven fabrics 20, 30, 40, 50, 60, and 70 are shown below as other specific examples of the nonwoven fabric of the present invention having an uneven shape.
  • the nonwoven fabric 20 of a 2nd embodiment is a two-layer structure which has the hollow part 21, as shown in FIG. Both layers contain thermoplastic fibers.
  • the nonwoven fabric 20 has the junction part 22 in which the 1st nonwoven fabric 20A and the 2nd nonwoven fabric 20B were partially heat-sealed.
  • the first nonwoven fabric 20A protrudes in a direction away from the second nonwoven fabric 20B, and has a large number of convex parts 23 each having a hollow part 21 therein.
  • the joint portion 22 is a concave portion located between the adjacent convex portions 23 and 23, and constitutes the concave and convex portions of the first surface 1 ⁇ / b> A together with the convex portion 23.
  • the nonwoven fabric 20 can be formed by a commonly used method.
  • the first nonwoven fabric 20 ⁇ / b> A is unevenly shaped by meshing two uneven rolls, and then the second nonwoven fabric is bonded to obtain the nonwoven fabric 20.
  • both the first nonwoven fabric 20A and the second nonwoven fabric 20B include non-heat-extensible and non-heat-shrinkable heat-sealing fibers.
  • the nonwoven fabric 20 when the nonwoven fabric 20 is used by being laminated on the absorbent body as a surface sheet with the first surface 1A facing the skin contact surface side, the liquid permeability from the first surface 1A side to the second surface 1B side is used. Excellent. Specifically, liquid permeation through the hollow portion 21 is performed. Moreover, a wearer's body pressure is added to the convex part 23, and the liquid in the convex part 23 transfers to the 2nd nonwoven fabric 3 directly. Thereby, there is little liquid residue in the 1st surface 1A side. Such an action can be continuously exerted at a higher level by the action of the liquid film cleaving agent described above or the cooperative action of the liquid film cleaving agent and the phosphate ester type anionic surfactant. That is, even when there is long-term use or a large amount of excretion, the liquid permeation route is secured by rupturing the liquid film, so that the liquid permeability as described above can be sufficiently exhibited.
  • the nonwoven fabric 30 of the third embodiment includes a first fiber layer 301 that includes thermoplastic fibers and has a shape that is uneven on both sides.
  • FIG. 10A shows a single-layer nonwoven fabric 30 ⁇ / b> A made up of only the first fiber layer 301.
  • FIG. 10B shows a non-woven fabric 30B having a two-layer structure that includes a first fiber layer 301 and a second fiber layer 302 bonded along the second surface 1B side of the first fiber layer 301.
  • each nonwoven fabric is demonstrated concretely.
  • the nonwoven fabric 30A first fiber layer 301 shown in FIG.
  • the first protrusion 31 protruding to the first surface 1A and the second protrusion 32 protruding to the second surface 1B side are the nonwoven fabric 30A. They are arranged alternately and continuously in different directions that intersect when viewed in plan.
  • the 1st protrusion part 31 and the 2nd protrusion part 32 have the internal space open
  • the first surface 1 ⁇ / b> A has an uneven shape of the first protrusion 31 and the recess 34.
  • the second surface 1 ⁇ / b> B has an uneven shape of the second protrusion 32 and the recess 33.
  • the nonwoven fabric 30 ⁇ / b> A has a wall portion 35 that connects the first protruding portion 31 and the second protruding portion 32.
  • the wall part 35 forms the wall surface of each internal space of the 1st protrusion part 31 and the 2nd protrusion part 32, and has a cyclic structure in a plane direction.
  • the fiber constituting the wall portion 35 has fiber orientation in the direction connecting the first protruding portion 31 and the second protruding portion 32 at any point of the annular structure.
  • stiffness is born on the wall.
  • the nonwoven fabric 30A has a moderate cushioning property, is excellent in recoverability even when pressure is applied, and can avoid collapse of each internal space.
  • a of nonwoven fabrics can employ
  • a nonwoven fabric 30B shown in FIG. 10B is formed by bonding the second fiber layer 302 along the unevenness on the second surface 1B side of the first fiber layer 301 described above. The nonwoven fabric 30B typically uses the first surface 1A as a skin contact surface.
  • the non-woven fabric 30B On the first surface 1 ⁇ / b> A side of the nonwoven fabric 30 ⁇ / b> B, the uneven shape of the first protruding portion 31 and the recessed portion 34 of the first fiber layer 301 described above spreads, and the wall portion of the annular structure between the first protruding portion 31 and the recessed portion 32. 35 is arranged. Therefore, the non-woven fabric 30B also has the fiber orientation of the first fiber layer 301 described above, whereby a stiffness is generated in the wall portion and excellent in unevenness recovery. In addition to this, the nonwoven fabric 30B is bulky and low in weight because the fiber web is shaped, formed into a nonwoven fabric, and both layers are joined by hot air treatment in an air-through process.
  • the fiber density of the second fiber layer 302 is the fiber density of the other parts of the first fiber layer 301 and the second fiber layer 302 on the second surface 1B side of the top of the first protrusion 31 of the first fiber layer 301.
  • Lower portion 36 Due to the presence of the low fiber density portion 36, the first protruding portion 31 of the first fiber layer 301 is easily recessed even at a low load, and thus the cushioning property of the nonwoven fabric 30B is enhanced.
  • the nonwoven fabric 30B When employ
  • the liquid permeation path is always secured by the action of the liquid film cleaving agent described above or the cooperative action of the liquid film cleaving agent and the phosphate ester type anionic surfactant. This widens the range of design for fiber diameter and fiber density.
  • an air-through process in which a multi-stage hot air treatment is performed on the fiber web while controlling the hot air temperature and the wind speed can be employed.
  • the manufacturing method described in paragraphs [0031] and [0032] of JP2012-136790A can be used.
  • the support shown in FIGS. 1 and 2 of JP2012-149370 and the support shown in FIGS. 1 and 2 of JP2012-149371 can be used.
  • the nonwoven fabric 30B laminated nonwoven fabric of the first fiber layer 301 and the second fiber layer 302 is manufactured by laminating the fiber web that becomes the second fiber layer 302 in the air-through process of the first fiber layer 301 described above. can do.
  • both the first fiber layer 301 and the second fiber layer 302 are preferably non-heat-extensible and non-heat-shrinkable heat-bonded fibers.
  • the nonwoven fabric 40 according to the fourth embodiment is composed of one layer containing thermoplastic fibers, and on the first surface 1 ⁇ / b> A side, a semicylindrical convex portion 41 and the side of the convex portion 41.
  • a plurality of recesses 42 arranged along the edge are alternately arranged.
  • a concave bottom portion 43 made of non-woven fiber is disposed below the concave portion 42.
  • the concave portion 43 has a fiber density lower than that of the convex portion 41.
  • another fiber layer 45 may be partially laminated on the convex portion 41 (see FIG. 12).
  • the nonwoven fabric 40 When the nonwoven fabric 40 is incorporated into an absorbent article as a surface sheet having the first surface 1A side as the skin contact surface side, the liquid received by the convex portion 41 easily shifts to the concave portion 42, and the second surface 1B in the concave portion 43. Easy to move to the side. Thereby, there is little liquid residue and stickiness of skin is suppressed. Also in the nonwoven fabric 40, the liquid permeation path is always ensured by the action of the liquid film cleaving agent described above, or the liquid film cleaving agent and the phosphate type anionic surfactant. This widens the range of design for fiber diameter and fiber density.
  • Such a non-woven fabric 40 can be formed by spraying a fluid such as hot air onto the portion of the fiber web that forms the recess 42 and moving the fiber. Thereby, the fiber density of the recessed part bottom part 43 can be made lower than the periphery.
  • the nonwoven fabric 50 has a concavo-convex structure in which streaky ridges 51 and ridges 52 extending in one direction (Y direction) are alternately arranged.
  • corrugated structure can be divided into 3 equal parts of 50 A of top areas, the bottom area 50B, and the side area 50C located among these.
  • the nonwoven fabric 50 has a plurality of heat fusion portions 55 at the intersections of the constituent fibers 54. Focusing on one constituent fiber 54, the constituent fiber 54 is, as shown in FIG.
  • the transition point 58 from the small diameter portion 56 to the large diameter portion 57 is within a range of 1/3 of the interval T between the adjacent fusion portions 55 and 55 and close to the fusion portion 55. It is preferable to be in the range (T1 and T3 in FIG. 14).
  • the configuration of the small-diameter portion 56 and the large-diameter portion 57 in such a constituent fiber is formed by stretching the fiber during the blade groove stretching process for forming the convex strip portion 51 and the concave strip portion 52.
  • the fiber used at that time is preferably a fiber having a high degree of stretching. Examples thereof include heat-extensible fibers that are obtained through the treatment steps described in paragraph [0033] of JP2010-168715A and that extend in length due to a change in the crystalline state of the resin due to heating.
  • the hydrophilicity of the small diameter portion is smaller than the hydrophilicity of the large diameter portion from the viewpoint of liquid permeability.
  • This difference in hydrophilicity can be formed by adding a stretchable component (hydrophobic component) to the fiber treatment agent attached to the fiber.
  • a stretchable component and a hydrophilic component are contained. Specifically, when the fiber is stretched by the blade groove stretching process described above, a stretchable component spreads in the stretched small-diameter portion 35 and a difference in hydrophilicity occurs between the large-diameter portion.
  • the hydrophilic component that hardly spreads remains, and the hydrophilicity becomes higher than that in the small-diameter portion.
  • the stretchable component include a silicone resin having a low glass transition point and a flexible molecular chain, and a polyorganosiloxane having a Si—O—Si chain as the main chain is preferably used as the silicone resin. It is done.
  • the nonwoven fabric 50 preferably has a fiber density in the side wall region 30C lower than that in the top region 30A and the bottom region 30B, from the viewpoint of liquid permeability.
  • the liquid permeation path is always ensured by the action of the liquid film cleaving agent, or the liquid film cleaving agent and the phosphate ester type anionic surfactant. This widens the range of design for fiber diameter and fiber density.
  • the nonwoven fabric 50 may be used alone, may be bonded to a flat fiber layer to form a laminated nonwoven fabric, or may be laminated to an uneven fiber layer and integrated along the unevenness. For example, you may laminate
  • the nonwoven fabric 60 of the sixth embodiment has an uneven shape including heat-extensible fibers.
  • the 1st surface 1A side is uneven
  • the second surface 1B side is flat or has a very small degree of unevenness than the first surface 1A side.
  • the uneven shape on the first surface 1A side includes a plurality of convex portions 61 and a linear concave portion 62 surrounding the convex portions 61.
  • the recess 62 has a pressure-bonded portion where the constituent fibers of the nonwoven fabric 60 are pressure-bonded or bonded, and the heat-extensible fiber is in a non-stretched state.
  • the convex part 62 is the part which the heat
  • the convex part 61 which touches skin becomes bulky by the heat
  • the nonwoven fabric 60 may have a single layer structure or may have a structure of two or more layers.
  • the layer on the second surface 1B side may not contain heat-extensible fibers or may have a lower content of heat-extensible fibers than the layer on the first surface 1A side having an uneven shape.
  • the liquid permeation path is always ensured by the action of the liquid film cleaving agent or the liquid film cleaving agent and the phosphate ester type anionic surfactant. This widens the range of design for fiber diameter and fiber density.
  • a nonwoven fabric 60 can be manufactured by the following method. First, the linear recessed part 62 is formed with respect to a fiber web by heat embossing. At this time, in the recessed part 62, the heat
  • the heat-extensible fibers existing in the portion other than the concave portion 61 are elongated by air-through processing to form the convex portion 61, thereby forming the nonwoven fabric 60.
  • the constituent fibers of the nonwoven fabric 60 may be a blend of the above-described heat-extensible fibers and non-heat-extensible heat-fusible fibers. Examples of these constituent fibers include those described in paragraphs [0013] and [0037] to [0040] of JP-A-2005-350836, and paragraphs [0012] and [0024] of JP-A-2011-127258. To [0046] can be used.
  • the nonwoven fabric 70 of the seventh embodiment is a laminated nonwoven fabric composed of an upper layer 71 and a lower layer 72 containing thermoplastic fibers, as shown in FIG.
  • the upper layer 71 convex portions 73 and concave portions 74 are alternately arranged, and the concave portions 74 are open.
  • the fiber density of the concave portion 74 is set lower than the fiber density of the convex portion 73.
  • the region where the convex portions 73 and the concave portions 74 are alternately and repeatedly disposed may be part of the upper layer 71 or the entire region.
  • the region is a liquid receiving region (corresponding to the excretion portion) when the nonwoven fabric 70 is used as the top sheet of the absorbent article. It is preferable that it exists in the part used as an area
  • the lower layer 72 has a substantially uniform fiber density. The lower layer 72 is laminated at least corresponding to a region where the convex portions 73 and the concave portions 74 of the upper layer 71 are alternately arranged.
  • the nonwoven fabric 70 since the nonwoven fabric 70 has the high fiber density of the convex part 73, it has a bulky cushioning property, and when it uses as a surface sheet of an absorbent article, it will become difficult to produce liquid return. Further, since the nonwoven fabric 70 has a low fiber density in the concave portion 74 and is in an open state, the nonwoven fabric 70 is excellent in liquid permeability, in particular, permeability to a highly viscous liquid. Also in the nonwoven fabric 70, the liquid permeation path is always ensured by the action of the liquid film cleaving agent described above, or the liquid film cleaving agent and the phosphate ester type anionic surfactant. This widens the range of design for fiber diameter and fiber density. Such a nonwoven fabric 70 can be manufactured, for example, by the method described in JP-A-4-24263, page 6, lower left column, line 12 to page 8, upper right column, line 19.
  • the liquid film cleaving agent and the nonwoven fabric containing the liquid film cleaving agent according to the present invention can be applied to various fields by taking advantage of its soft touch and reduction of liquid residue.
  • a top sheet, a second sheet (a sheet disposed between the top sheet and the absorbent body) in an absorbent article used to absorb liquid discharged from the body such as sanitary napkins, panty liners, disposable diapers, and incontinence pads It is preferably used as an absorbent body, a covering sheet that wraps the absorbent body, a leak-proof sheet, or a personal wipe sheet, a skin care sheet, and an objective wiper.
  • the nonwoven fabric of this invention When using the nonwoven fabric of this invention as a surface sheet or a second sheet of an absorbent article, it is preferable to use the 1st layer side of this nonwoven fabric as a skin opposing surface side.
  • the liquid film cleaving agent according to the present invention can be applied to various fiber materials such as a woven cloth as long as it has an action of cleaving the liquid film.
  • the basis weight of the nonwoven fabric finally obtained is preferably 10 g / m 2 or more and 100 g / m 2 or less, particularly preferably 15 g / m 2 or more and 80 g / m 2 or less.
  • An absorbent article used for absorbing liquid discharged from the body typically includes a top sheet, a back sheet, and a liquid-retaining absorbent disposed between both sheets.
  • a top sheet materials usually used in the technical field can be used without particular limitation.
  • a fiber assembly made of a fiber material such as pulp fiber or a fiber assembly in which an absorbent polymer is held can be coated with a covering sheet such as tissue paper or nonwoven fabric.
  • a liquid-impermeable or water-repellent sheet such as a thermoplastic resin film or a laminate of the film and a nonwoven fabric can be used.
  • the back sheet may have water vapor permeability.
  • the absorbent article may further include various members according to specific uses of the absorbent article. Such members are known to those skilled in the art. For example, when applying an absorbent article to a disposable diaper or a sanitary napkin, a pair or two or more pairs of three-dimensional guards can be disposed on the left and right sides of the topsheet.
  • the present invention further discloses the following nonwoven fabric and absorbent article with respect to the above-described embodiment.
  • the expansion coefficient of the liquid film cleaving agent or the compound C1 is more preferably 20 mN / m or more, further preferably 25 mN / m or more, and particularly preferably 30 mN / m or more, and the nonwoven fabric according to the above ⁇ 2> or ⁇ 3> .
  • the interfacial tension of the liquid film cleaving agent or the compound C1 with respect to a liquid having a surface tension of 50 mN / m is preferably 20 mN / m or less, more preferably 17 mN / m or less, still more preferably 13 mN / m or less, and 10 mN / m.
  • liquid film cleaving agent or the compound C1 comprises a compound having at least one structure selected from the group consisting of the following structures X, XY, and YXY. > Any one of>.
  • Structure X is> C (A)- ⁇ C represents a carbon atom. ⁇ ,>, And-indicate a bond. The same applies hereinafter.
  • a hydrogen atom or —C (A) 3 , —C (A) 2 B, —C (A) (B) 2, —C (A) 2 —C (R 1 ) 3 , -C (R 1 ) 2 A, -C (R 1 ) 3 , -OSi (R 1 ) 3 , -OSi (R 1 ) 2 (R 2 ), -Si (R 1 ) 3 , -Si (R 1 ) 2 It has at least one group selected from the group consisting of (R 2 ).
  • Each of R 1 and R 2 independently represents a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, or a halogen atom.
  • a and B each independently represent a substituent containing an oxygen atom or a nitrogen atom.
  • R 1 , R 2 , A, and B in the structure X may be the same as or different from each other.
  • Y represents a hydrophilic group having hydrophilicity including an atom selected from a hydrogen atom, a carbon atom, an oxygen atom, a nitrogen atom, a phosphorus atom, and a sulfur atom.
  • Y is plural, they may be the same or different.
  • the liquid film cleaving agent or the compound C1 is composed of an organically modified silicone that is a silicone-based surfactant.
  • organically modified silicone amino-modified, epoxy-modified, carboxy-modified, diol-modified, carbinol-modified, (meth) acrylic. Modification, mercapto modification, phenol modification, polyether modification, methylstyryl modification, long chain alkyl modification, higher fatty acid ester modification, higher alkoxy modification, higher fatty acid modification and fluorine modification, including at least one selected from the group consisting of silicones
  • the nonwoven fabric according to any one of ⁇ 1> to ⁇ 6>.
  • the liquid film cleaving agent or the compound C1 is composed of a polyoxyalkylene-modified silicone, and the polyoxyalkylene-modified silicone is at least one selected from the group consisting of compounds represented by the following formulas [I] to [IV].
  • the nonwoven fabric according to any one of ⁇ 1> to ⁇ 7>, wherein In the formula, R 31 is an alkyl group (preferably having 1 to 20 carbon atoms. For example, methyl group, ethyl group, propyl group, isopropyl group, butyl group, pentyl group, hexyl group, heptyl group, 2-ethyl-hexyl group, Nonyl group and decyl group are preferred).
  • R 32 represents a single bond or an alkylene group (preferably having a carbon number of 1 to 20, for example, a methylene group, an ethylene group, a propylene group or a butylene group is preferred), and preferably represents the alkylene group.
  • the plurality of R 31 and the plurality of R 32 may be the same as or different from each other.
  • M 11 represents a group having a polyoxyalkylene group, and a polyoxyalkylene group is preferable.
  • the polyoxyalkylene group include a polyoxyethylene group, a polyoxypropylene group, a polyoxybutylene group, or a copolymer of these constituent monomers.
  • m and n are each independently an integer of 1 or more. Note that the symbols of these repeating units are determined separately in each of the formulas [I] to [IV], and do not necessarily indicate the same integer, and may be different.
  • liquid film cleaving agent has an expansion coefficient of greater than 0 mN / m for a liquid having a surface tension of 50 mN / m and an interfacial tension of 20 mN / m or less for a liquid having a surface tension of 50 mN / m.
  • Compound C2 A compound having an expansion coefficient greater than 0 mN / m for a liquid having a surface tension of 50 mN / m and an interfacial tension of 20 mN / m or less for a liquid having a surface tension of 50 mN / m.
  • the interfacial tension of the liquid film cleaving agent or the compound C2 with respect to a liquid having a surface tension of 50 mN / m is preferably 17 mN / m or less, more preferably 13 mN / m or less, still more preferably 10 mN / m or less, and 9 mN / m.
  • the expansion coefficient of the liquid film cleaving agent or the compound C2 with respect to a liquid having a surface tension of 50 mN / m is preferably 9 mN / m or more, more preferably 10 mN / m or more, further preferably 15 mN / m or more, and 50 mN / m.
  • liquid film cleaving agent or the compound C2 comprises a compound having at least one structure selected from the group consisting of the following structures Z, ZY, and YZY: The nonwoven fabric according to any one of> to ⁇ 12>.
  • the structure Z includes:> C (A)- ⁇ C: carbon atom>, -C (A) 2- , -C (A) (B)-,> C (A) -C (R 3 ) ⁇ ,> C Any basic structure of (R 3 ) —, —C (R 3 ) (R 4 ) —, —C (R 3 ) 2 —,> C ⁇ is repeated, or two or more are combined Represents a hydrocarbon chain of structure.
  • R 3 and R 4 each independently represent a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a fluoroalkyl group, an aralkyl group, a hydrocarbon group obtained by combining them, or a fluorine atom.
  • a and B each independently represent a substituent containing an oxygen atom or a nitrogen atom.
  • R 3 , R 4 , A, and B When there are a plurality of R 3 , R 4 , A, and B in the structure Z, they may be the same as or different from each other.
  • Y represents a hydrophilic group having hydrophilicity including an atom selected from a hydrogen atom, a carbon atom, an oxygen atom, a nitrogen atom, a phosphorus atom, and a sulfur atom. When Y is plural, they may be the same or different.
  • the liquid film cleaving agent or the compound C2 is a polyoxyalkylene alkyl (POA) ether represented by any one of the following formula [V], and a polyoxyalkylene alkyl (POA) ether represented by the following formula [VI] and having a mass average molecular weight of 1000 or more.
  • POA polyoxyalkylene alkyl
  • L 21 represents an ether group, an amino group, an amide group, an ester group, a carbonyl group, a carbonate group, a polyoxyethylene group, a polyoxypropylene group, a polyoxybutylene group, or a polyoxyalkylene group obtained by combining them
  • a linking group such as R 51 is a hydrogen atom, methyl group, ethyl group, propyl group, isopropyl group, butyl group, pentyl group, hexyl group, heptyl group, 2-ethylhexyl group, nonyl group, decyl group, methoxy group, ethoxy group, phenyl group , A fluoroalkyl group, an aralkyl group, a hydrocarbon group obtained by combining them, or various substituents composed of a fluorine atom.
  • A, b, m and n are each independently an integer of 1 or more.
  • the number of carbon atoms and the number of hydrogen atoms are determined independently in each of the formulas [V] and [VI], and may not necessarily represent the same integer and may be different.
  • “m” in — (C a H b O) m — is an integer of 1 or more.
  • the value of this repeating unit is determined independently in each of the formulas [V] and [VI], and does not necessarily indicate the same integer, and may be different.
  • the liquid film cleaving agent or the compound C2 is a fatty acid represented by the following formula [VII], a glycerin fatty acid ester and a pentaerythritol fatty acid ester represented by the following formula [VIII-I] or [VIII-II], A partially esterified product of glycerin fatty acid ester, sorbitan fatty acid ester, and pentaerythritol fatty acid ester represented by any one of [IX], any of the following formula [X], or any of the following formula [XI], [XII] a compound having a sterol structure, an alcohol represented by the following formula [XIII], a fatty acid ester represented by the following formula [XIV], and a wax represented by the following formula [XV].
  • m and n are each independently an integer of 1 or more.
  • C m H n is a hydrocarbon group of each of the above fatty acids.
  • m, m ′, m ′′, n, n ′ and n ′′ are each independently an integer of 1 or more.
  • the plurality of m and the plurality of n may be the same as or different from each other.
  • C m H n, C m 'H n' and C m '' H n '' are each a hydrocarbon group of each of the fatty acid.
  • m and n are each independently an integer of 1 or more.
  • the plurality of m and the plurality of n may be the same as or different from each other.
  • C m H n is a hydrocarbon group of each of the above fatty acids.
  • R 52 represents a linear or branched, saturated or unsaturated hydrocarbon group (an alkyl group, an alkenyl group, an alkynyl group, etc.) having 2 to 22 carbon atoms.
  • m and n are each independently an integer of 1 or more.
  • the plurality of m and the plurality of n may be the same as or different from each other.
  • C m H n is a hydrocarbon group of each of the above fatty acids.
  • m and n are each independently an integer of 1 or more.
  • C m H n is a hydrocarbon group of each of the above alcohol.
  • m and n are each independently an integer of 1 or more.
  • C m H n may be the same or different.
  • C m H n -COO- of C m H n is a hydrocarbon group of each of the above fatty acids.
  • C m H n in —COOC m H n represents an alcohol-derived hydrocarbon group that forms an ester.
  • m and n are each independently an integer of 1 or more.
  • ⁇ 16> The nonwoven fabric according to any one of ⁇ 1> to ⁇ 15>, wherein the array is an array along a plurality of intersecting directions on the surface of the nonwoven fabric.
  • the plurality of intersecting directions include a first direction of the nonwoven fabric and a second direction orthogonal thereto.
  • the array is disposed at least at a position to be a liquid receiving part, and when the nonwoven fabric is applied as a surface sheet of a paper diaper or a daytime napkin, the liquid receiving part is in the longitudinal direction and the width direction of the paper diaper or the daytime napkin.
  • the nonwoven fabric is applied as a surface sheet of a night napkin, the central portion in the longitudinal direction and the width direction in the second region from the front when the night napkin is divided into four in the longitudinal direction.
  • ⁇ 19> The nonwoven fabric according to any one of ⁇ 1> to ⁇ 18>, wherein a plurality of the containing parts are arranged apart from each other.
  • the array is an array of sea-island-like arrangement patterns in which the containing parts are arranged apart from each other in the continuous non-containing part.
  • ⁇ 22> Any one of ⁇ 1> to ⁇ 21>, wherein the length of the inclusion part on the virtual line is shorter than the length of the non-inclusion part when an imaginary line along an arbitrary direction crossing the nonwoven fabric is arbitrarily drawn Or the nonwoven fabric according to 1.
  • the said imaginary line is an absorbent article as described in said ⁇ 22> drawn in the position where the length of the said non-containing part becomes the longest.
  • the ratio of the length S2 of the containing part to the length S1 of the non-containing part on the phantom line, that is, S2 / S1 is 1/19 or more and 1 or less, preferably less than 1, more preferably 2/3 or less.
  • the ratio of the length S2 of the containing part on the imaginary line to the length S1 of the non-containing part, that is, S2 / S1 is 1/4 or more and 3/7 or less, according to ⁇ 22> or ⁇ 23>.
  • the ratio of the total area of the content part to the sum of the total area of the content part and the non-content part is 5% or more and 50% or less, preferably 40% or less, more preferably 30% or less, and The nonwoven fabric according to any one of ⁇ 1> to ⁇ 26>, wherein the ratio is preferably 10% or more, and more preferably 20% or more.
  • the ratio of the total area of the containing part to the sum of the total area of the containing part and the non-containing part is 20% or more and 30% or less, according to any one of the above items ⁇ 1> to ⁇ 26> Non-woven fabric.
  • ⁇ 29> Any one of the above items ⁇ 1> to ⁇ 28>, wherein the containing part has a circular shape, and the containing part is plurally arranged and spaced apart from each other along both the longitudinal direction and the width direction. Or the nonwoven fabric according to 1.
  • ⁇ 30> Either of the above-mentioned ⁇ 1> to ⁇ 28>, wherein both the containing part and the non-containing part extend in a band shape in the longitudinal direction, and the band-like containing part and the non-containing part are alternately arranged in the width direction.
  • ⁇ 31> In the non-woven fabric surface, in the non-containing parts continuously extending in a plurality of directions and formed in a lattice shape, a plurality of containing parts shaped like rhombuses are arranged spaced apart from each other. 28> The nonwoven fabric according to any one of 28>. ⁇ 32> On the surface of the nonwoven fabric, the above-mentioned ⁇ 1> to ⁇ 28> The nonwoven fabric according to any one of 28>.
  • ⁇ 33> The nonwoven fabric according to any one of ⁇ 1> to ⁇ 32>, wherein the contact angle of the constituent fibers of the containing part is larger than the contact angle of the constituent fibers of the non-containing part.
  • the difference between the contact angle of the constituent fibers of the containing part and the contact angle of the constituent fibers of the non-containing part is 5 degrees or more and 90 degrees or less, preferably 10 degrees or more, more preferably 20 degrees or more, and 60 degrees or less.
  • the nonwoven fabric according to the above ⁇ 33> preferably 40 ° or less.
  • the non-woven fabric according to ⁇ 33> wherein the difference between the contact angle of the constituent fibers of the containing part and the contact angle of the constituent fibers of the non-containing part is 20 degrees or more and 40 degrees or less.
  • the contact angle of the constituent fibers of the non-containing part is preferably 90 degrees or less, more preferably 80 degrees or less, and further preferably 70 degrees or less, any one of the above items ⁇ 33> to ⁇ 35> Or the nonwoven fabric according to 1.
  • the liquid film cleaving agent, the compound C1 or the compound C2 has a viscosity of 0 cps or more, preferably 10000 cps or less, more preferably 1000 cps or less, and further preferably 200 cps or less, any one of the above items ⁇ 1> to ⁇ 37> Or the nonwoven fabric according to 1.
  • the surface tension of the liquid film cleaving agent, the compound C1 or the compound C2 is preferably 32 mN / m or less, more preferably 30 mN / m or less, further preferably 25 mN / m or less, particularly preferably 22 mN / m or less, and 1 mN.
  • ⁇ 42> The nonwoven fabric according to any one of ⁇ 1> to ⁇ 41>, wherein the nonwoven fabric has an uneven shape having a convex portion and a concave portion.
  • ⁇ 43> The nonwoven fabric according to ⁇ 42>, wherein a top portion of the convex portion includes the containing portion.
  • ⁇ 44> The nonwoven fabric according to ⁇ 42> or ⁇ 43>, wherein the bottom of the recess has the non-containing portion.
  • ⁇ 45> The nonwoven fabric according to ⁇ 42>, wherein the convex portion and the containing portion are matched, and the concave portion and the non-containing portion are matched.
  • ⁇ 46> An absorbent article using the nonwoven fabric according to any one of ⁇ 1> to ⁇ 45> as a surface sheet.
  • ⁇ 47> The absorbent article according to ⁇ 46>, wherein the absorbent article is a sanitary napkin.
  • ⁇ 49> The absorbent article according to ⁇ 48>, wherein the imaginary line is drawn at a position where the length of the non-containing part is longest.
  • Example 1 The uneven raw material nonwoven fabric shown in FIG. 8 was produced by the method described above. Non-heat-shrinkable heat-bonded fibers with a fineness of 1.2 dtex are used for the upper layer (layer on the first surface 1A side), and heat-shrinkable fibers with a fineness of 2.3 dtex are used for the lower layer (layer on the second surface 1B side). Using. At this time, the distance between the fibers in the upper layer was 80 ⁇ m, and the distance between the fibers in the lower layer was 60 ⁇ m. Moreover, the basic weight of the said nonwoven fabric was 74 g / m ⁇ 2 >. The size of the produced raw material nonwoven fabric was 20 cm in the longitudinal direction and 7 cm in the width direction.
  • the longitudinal direction is the machine unloading direction (MD) for manufacturing the nonwoven fabric
  • the width direction is the direction (CD) orthogonal to the machine unloading direction.
  • Polyoxyethylene (POE) modified dimethyl silicone (KF-6015 manufactured by Shin-Etsu Chemical Co., Ltd.) and X in the structure XY is from —Si (CH 3 ) 2 O— to the surface of the uneven structure of the raw material nonwoven fabric.
  • a dimethylsilicone chain wherein Y is a POE chain composed of — (C 2 H 4 O) —, the terminal group of the POE chain is a methyl group (CH 3 ), the modification rate is 20%, and the polyoxyethylene addition mole number
  • a liquid film cleaving agent having a mass average molecular weight of 4000 was applied in the following pattern by a flexographic printing method. That is, as shown in FIG. 1, the liquid film cleaving agent was applied so as to form a pattern in which a plurality of dot-like containing parts were arranged in continuous non-containing parts.
  • the nonwoven fabric after coating was designated as a nonwoven fabric sample M1 of Example 1.
  • area ratio of the containing part ⁇ total area of containing part / sum of total area of containing part and non-containing part ⁇ ⁇ 100) are as shown in Table 1.
  • the longitudinal direction and the width direction of the nonwoven fabric sample M1 are directions that coincide with the longitudinal direction and the width direction of the raw material nonwoven fabric.
  • the length of each of the containing part and the non-containing part in the width direction was a value measured by drawing an imaginary line T shown in FIG.
  • the viscosity of the liquid film cleaving agent itself was 163 cps as a result of measurement by the method described above (Method for measuring the viscosity of a liquid cleaving agent).
  • the liquid film cleaving agent had a surface tension of 21.0 mN / m and a water solubility of less than 0.0001 g.
  • the expansion coefficient of the liquid film cleaving agent for a liquid having a surface tension of 50 mN / m was 28.8 mN / m, and the interfacial tension for a liquid having a surface tension of 50 mN / m was 0.2 mN / m. .
  • a liquid having a surface tension of 50 mN / m is obtained by adding polyoxyethylene sorbitan monolaurate, which is a nonionic surfactant, to 100 g of deionized water (trade name: Leool Super TW-L120, manufactured by Kao Corporation).
  • deionized water trade name: Leool Super TW-L120, manufactured by Kao Corporation.
  • ACURA825, manufactured by Socorex Isba SA was used.
  • the water solubility was measured by adding an agent every 0.0001 g.
  • Example 2 Basis weight in content part of liquid film cleaving agent, content ratio of liquid film cleaving agent to mass of whole nonwoven fabric sample (OPU), length of each content part and non-content part in width direction, and area ratio of content part ( ⁇ A nonwoven fabric sample M2 of Example 2 was produced in the same manner as in Example 1 except that the total area of the containing part / the sum of the total area of the containing part and the non-containing part ⁇ ⁇ 100) was as shown in Table 1.
  • Example 3 Basis weight in content part of liquid film cleaving agent, content ratio of liquid film cleaving agent to mass of whole nonwoven fabric sample (OPU), length of each content part and non-content part in width direction, and area ratio of content part ( ⁇ A nonwoven fabric sample M3 of Example 3 was produced in the same manner as in Example 1 except that the total area of the containing part / the sum of the total area of the containing part and the non-containing part ⁇ ⁇ 100) was as shown in Table 1.
  • Example 4 The containing part and non-containing part of the liquid film cleaving agent are arranged in a strip-like (striped) arrangement pattern as shown in FIG. ), The length of each of the containing part and the non-containing part in the width direction, and the area ratio of the containing part ( ⁇ total area of the containing part / sum of the total area of the containing part and the non-containing part ⁇ ⁇ 100) as shown in Table 1.
  • a nonwoven fabric sample M4 of Example 4 was produced in the same manner as in Example 1 except that.
  • Example 5 Basis weight in content part of liquid film cleaving agent, content ratio of liquid film cleaving agent to mass of whole nonwoven fabric sample (OPU), length of each content part and non-content part in width direction, and area ratio of content part ( ⁇ A nonwoven fabric sample M5 of Example 5 was produced in the same manner as in Example 4 except that the total area of the containing part / the sum of the total area of the containing part and the non-containing part ⁇ ⁇ 100) was as shown in Table 1.
  • Example 6 The content part and non-content part of a liquid film cleaving agent are made into the arrangement pattern which rotated the grid
  • a nonwoven fabric sample M6 of Example 6 was produced in the same manner as in Example 1 except that it was as described above.
  • Example 7 Epoxy-modified dimethyl silicone (Shin-Etsu Chemical Co., Ltd., KF-101) as a liquid film cleaving agent, X in structure XY is a dimethyl silicone chain composed of —Si (CH 3 ) 2 O—, Y is — (RC 2 H 3 O) — consisting of an epoxy group having a modification rate of 32% and a mass average molecular weight of 35800, basis weight in the content of the liquid film cleaving agent, and a nonwoven film sample of the liquid film cleaving agent Content ratio (OPU) with respect to the total mass, length of each containing part and non-containing part in the width direction, and area ratio of containing part ( ⁇ total area of containing part / sum of total area of containing part and non-containing part ⁇
  • OPU liquid film cleaving agent Content ratio
  • the viscosity of the liquid film cleaving agent itself was 1515 cps as a result of measurement by the method described above (Method for measuring viscosity of liquid cleaving agent).
  • the liquid film cleaving agent had a surface tension of 21.0 mN / m and a water solubility of less than 0.0001 g.
  • the expansion coefficient of the liquid film cleaving agent for a liquid having a surface tension of 50 mN / m was 26.0 mN / m, and the interfacial tension for a liquid having a surface tension of 50 mN / m was 3.0 mN / m.
  • Example 8 Tricaprylic acid / glycol capric acid (Coconard MT manufactured by Kao Corporation) as a liquid film cleaving agent, and Z in the structure ZY is * —O—CH (CH 2 O— *) 2 (* represents a bond) Y is composed of a hydrocarbon chain of C 8 H 15 O— or C 10 H 19 O—, the fatty acid composition is composed of 82% caprylic acid and 18% capric acid, and the mass average molecular weight is 550.
  • the nonwoven fabric sample M8 of Example 8 was obtained in the same manner as in Example 1 except that the area ratio ( ⁇ total area of containing part / sum of total area of containing part and non-containing part ⁇ ⁇ 100) was as shown in Table 2.
  • the viscosity of the liquid film cleaving agent itself was 24.1 cps as a result of measurement by the method described above (Method for measuring viscosity of liquid cleaving agent).
  • the liquid film cleaving agent had a surface tension of 28.9 mN / m and a water solubility of less than 0.0001 g.
  • the expansion coefficient of the liquid film cleaving agent for a liquid having a surface tension of 50 mN / m was 8.8 mN / m, and the interfacial tension for a liquid having a surface tension of 50 mN / m was 12.3 mN / m.
  • Example 9 Liquid isoparaffin (rubitol Lite, manufactured by BASF Japan Ltd.) having a mass average molecular weight of 450 is used as the liquid film cleaving agent, the basis weight in the content of the liquid film cleaving agent, and the mass of the nonwoven film sample of the liquid film cleaving agent The content ratio (OPU), the length of each of the containing part and the non-containing part in the width direction, and the area ratio of the containing part ( ⁇ total area of the containing part / sum of the total area of the containing part and the non-containing part ⁇ ⁇ 100)
  • a nonwoven fabric sample M9 of Example 9 was produced in the same manner as in Example 1 except that it was as shown in Table 2.
  • the viscosity of the liquid film cleaving agent itself was 20.0 cps as a result of measurement by the method described above (Method for measuring viscosity of liquid cleaving agent).
  • the liquid film cleaving agent had a surface tension of 27.0 mN / m and a water solubility of less than 0.0001 g.
  • the expansion coefficient of the liquid film cleaving agent for a liquid with a surface tension of 50 mN / m was 14.5 mN / m, and the interfacial tension for a liquid with a surface tension of 50 mN / m was 8.5 mN / m.
  • Example 10 Basis weight in content part of liquid film cleaving agent, content ratio of liquid film cleaving agent to mass of whole nonwoven fabric sample (OPU), length of each content part and non-content part in width direction, and area ratio of content part ( ⁇ A nonwoven fabric sample M10 of Example 10 was produced in the same manner as in Example 4 except that the total area of the containing part / the sum of the total area of the containing part and the non-containing part ⁇ ⁇ 100) was as shown in Table 2.
  • Example 11 Basis weight in content part of liquid film cleaving agent, content ratio of liquid film cleaving agent to mass of whole nonwoven fabric sample (OPU), length of each content part and non-content part in width direction, and area ratio of content part ( ⁇ A nonwoven fabric sample M11 of Example 11 was produced in the same manner as in Example 6 except that the total area of the containing part / the sum of the total area of the containing part and the non-containing part ⁇ ⁇ 100) was as shown in Table 2.
  • Example 12 Basis weight in content part of liquid film cleaving agent, content ratio of liquid film cleaving agent to mass of whole nonwoven fabric sample (OPU), length of each content part and non-content part in width direction, and area ratio of content part ( ⁇ A nonwoven fabric sample M12 of Example 12 was produced in the same manner as in Example 1 except that the total area of the containing part / the sum of the total area of the containing part and the non-containing part ⁇ ⁇ 100) was as shown in Table 2.
  • Example 1 The raw material non-woven fabric used in Example 1 before coating with the liquid film cleaving agent was directly prepared as the non-woven fabric sample Q1 of Comparative Example 1.
  • Reference Example 1 The liquid film cleaving agent used in Example 1 was applied to the entire surface of the raw material nonwoven fabric, the basis weight in the content part of the liquid film cleaving agent, the content ratio (OPU) of the liquid film cleaving agent to the whole nonwoven fabric sample, and the width direction Except that the length of each of the containing part and the non-containing part and the area ratio of the containing part ( ⁇ sum of the total area of the containing part / sum of the total area of the containing part and the non-containing part ⁇ ⁇ 100) are as shown in Table 2.
  • a nonwoven fabric sample V1 of Reference Example 1 was produced in the same manner as Example 1.
  • the sanitary napkin (manufactured by Kao Corporation: Whyr F, happy bare skin 30 cm, made in 2014) is removed, the surface sheet is removed, and each nonwoven fabric sample is laminated instead, and the periphery is fixed for evaluation.
  • a sanitary napkin was prepared. An acrylic plate having a transmission hole with an inner diameter of 1 cm was overlaid on the surface of each evaluation sanitary napkin, and a constant load of 100 Pa was applied to the napkin. Under such a load, 6.0 g of pseudo blood corresponding to menstrual blood (adjusted equine defibrinated blood manufactured by Japan Biotest Laboratories Co., Ltd.
  • the equine defibrinated blood used was adjusted with a TVB10 viscometer manufactured by Toki Sangyo Co., Ltd. under the condition of 30 rpm.
  • a highly viscous portion such as red blood cells
  • a low viscosity portion plasma remains as a supernatant.
  • the mixing ratio of the part was adjusted to 8.0 cP.
  • the acrylic plate is removed 60 seconds after a total of 6.0 g of simulated blood has been poured.
  • the weight (W2) of the nonwoven fabric sample was measured, and the difference (W2 ⁇ W1) from the weight (W1) of the nonwoven fabric sample before flowing the simulated blood, which had been measured in advance, was calculated.
  • the above operation was performed 3 times, and the average value of the 3 times was defined as the remaining liquid amount (mg).
  • the liquid remaining amount is an index of how much the wearer's skin gets wet. The smaller the liquid remaining amount, the better the result.
  • test apparatus As the test apparatus, a test apparatus having a mounting portion in which the mounting surface of the test sample is inclined by 45 ° with respect to the horizontal plane was used. A sanitary napkin for evaluation using each non-woven fabric sample as a top sheet was placed on the mounting portion with the top sheet facing upward. A sanitary napkin for evaluation was prepared in the same manner as the above measurement (the amount of remaining liquid of the nonwoven fabric sample (surface sheet)). On the surface of each evaluation sanitary napkin, 0.5 g of pseudo blood (adjusted to 8.0 cP of equine defibrinated blood manufactured by Japan Biotest Laboratories Co., Ltd.) was dropped at a rate of 0.1 g / sec.
  • the distance from the point where the liquid was first applied to the nonwoven fabric to the point where the test liquid was drawn into the nonwoven fabric and stopped flowing was measured.
  • the pseudo blood used was adjusted by the method similar to the measurement of the liquid remaining amount of the said surface sheet (nonwoven fabric sample).
  • the above operation was performed 3 times, and the average value of the 3 times was defined as the liquid flow length (mm).
  • the liquid flow length is an index of how easily the liquid flows on the surface without being absorbed by the test sample and is likely to leak at the time of mounting. The shorter the liquid flow length, the higher the evaluation.
  • the macro expandability of the liquid film cleaving agent can be evaluated by the macro expansion distance of the liquid film cleaving agent. Separately from the above test, the macro expansion distance of each liquid film cleaving agent used in Examples 1, 7, 8, and 9 was measured by the following method. Each liquid film cleaving agent used in Examples 1, 7, 8 and 9 was colored, and each colored liquid film cleaving agent was attached to the top of the convex part of the uneven nonwoven fabric of FIG. A sanitary napkin for evaluation was produced in the same manner as in the above (the amount of remaining liquid of the nonwoven fabric sample (surface sheet)) except that a dot-shaped containing portion was formed.
  • the basis weight of the liquid film cleaving agent at this time was 25.9 g / m 2 .
  • An acrylic plate having a permeation hole with an inner diameter of 1 cm is overlaid on the surface of each sanitary napkin for evaluation, and a constant load of 100 Pa is applied to the napkin. Under such load, menstrual blood is passed through the permeation hole of the acrylic plate.
  • menstrual blood is passed through the permeation hole of the acrylic plate.
  • the region where the colored liquid film cleaving agent was diffused was measured as a distance in 8 directions from the center of the dot-shaped containing portion, and the average value was taken as the macro extended distance of the liquid film cleaving agent.
  • Example 1 to 12 the liquid flow length was suppressed as compared with Reference Example 1, and the liquid flow prevention property was higher than that of Reference Example 1.
  • Examples 1 to 12 achieved both improvement of liquid residue reduction and improvement of liquid flow prevention.
  • each liquid film cleaving agent used in Examples 1 to 12 has a dot-shaped content part having a diameter of 0.8 mm. It was confirmed that it extends to the non-contained part beyond.
  • the area ratio of the containing part is 23% to 70%, the non-containing part is present, and the content ratio (OPU) of the liquid film cleaving agent to the total fiber mass of the nonwoven fabric sample is Despite being only 5% to 60% of the OPU of Reference Example 1, the effect of reducing the liquid residue was exhibited at the same level as that of Reference Example 1. It was confirmed that the liquid film cleaving agent has higher macro expansibility as the viscosity is lower and the expansion coefficient is higher.

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  • Health & Medical Sciences (AREA)
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  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
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WO2022088040A1 (en) * 2020-10-30 2022-05-05 The Procter & Gamble Company Nonwoven and absorbent articles having the same
CN114836855B (zh) * 2022-02-16 2023-08-25 张家港扬子纺纱有限公司 一种混合凝胶喷雾的纺纱喷头及其混合工艺

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TWI740948B (zh) 2021-10-01
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