CN110573671A - absorbent article - Google Patents

absorbent article Download PDF

Info

Publication number
CN110573671A
CN110573671A CN201880028404.8A CN201880028404A CN110573671A CN 110573671 A CN110573671 A CN 110573671A CN 201880028404 A CN201880028404 A CN 201880028404A CN 110573671 A CN110573671 A CN 110573671A
Authority
CN
China
Prior art keywords
compound
nonwoven fabric
less
group
component
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CN201880028404.8A
Other languages
Chinese (zh)
Other versions
CN110573671B (en
Inventor
寒川裕太
蒲谷吉晃
铃木华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kao Corp
Original Assignee
Kao Corp
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 Kao Corp filed Critical Kao Corp
Publication of CN110573671A publication Critical patent/CN110573671A/en
Application granted granted Critical
Publication of CN110573671B publication Critical patent/CN110573671B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/20—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing organic materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/24—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/48—Surfactants
    • 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
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/02—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with hydrocarbons
    • 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
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
    • D06M13/165—Ethers
    • D06M13/17—Polyoxyalkyleneglycol ethers
    • 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
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/244—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus
    • D06M13/282—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus with compounds containing phosphorus
    • D06M13/292—Mono-, di- or triesters of phosphoric or phosphorous acids; Salts thereof
    • 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
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
    • D06M13/402—Amides imides, sulfamic acids
    • 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
    • D06M15/53—Polyethers
    • 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
    • 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

Abstract

a nonwoven fabric comprising a liquid film-splitting agent and 1 or more components selected from the following components (D1), (D2) and (D3). (D1) A nonionic surfactant; (D2) a compound having a surface tension of 42mN/m or more; (D3) a compound having a melting point of 40 ℃ or higher, more hydrophilic than the liquid film cracking agent, and having no hydrophilic group.

Description

Absorbent article
Technical Field
the present invention relates to a nonwoven fabric used for an absorbent article and the like.
Background
In recent years, nonwoven fabrics used as surface materials and the like that come into contact with the skin of absorbent articles have been proposed to improve the wearing comfort such as dryness. For example, patent document 1 describes: the liquid film cracking agent can crack the liquid film generated in the narrow space between the fibers of the non-woven fabric, and reduce the liquid residue in the non-woven fabric. This can improve the dryness of the nonwoven fabric.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2016-117981
Disclosure of Invention
The present invention provides a nonwoven fabric comprising a liquid film-splitting agent and 1 or more components selected from the following components (D1), (D2) and (D3).
(D1) Nonionic surfactant
(D2) Compound having surface tension of 42mN/m or more
(D3) a compound having a melting point of 40 ℃ or higher, being more hydrophilic than the liquid film cracking agent, and having no hydrophilic group.
Further, the present invention provides a nonwoven fabric containing 1 or more compounds selected from the following compound (C1) and the following compound (C2), and 1 or more components selected from the following components (D1), (D2), and (D3).
(C1) A compound having a spreading coefficient of 15mN/m or more with respect to a liquid having a surface tension of 50mN/m and a water solubility of 0g to 0.025g
(C2) A spreading factor of more than 0mN/m with respect to a liquid having a surface tension of 50mN/m, a water solubility of 0g or more and 0.025g or less, and an interfacial tension of 20mN/m or less with respect to a liquid having a surface tension of 50mN/m
(D1) Nonionic surfactant
(D2) compound having surface tension of 42mN/m or more
(D3) A compound having a melting point of 40 ℃ or higher, being more hydrophilic than the above-mentioned compound (C1), and having no hydrophilic group.
Further, the present invention provides a nonwoven fabric containing a liquid film-splitting agent, wherein the reduction rate of surface tension is less than 25% in the following [ method for measuring the reduction rate of surface tension of body fluid ].
[ method of measuring the rate of decrease in surface tension of body fluid ]
(1) The following test solutions were prepared. The surface tension was measured by the plate method in an ambient region at a temperature of 25 ℃ and a Relative Humidity (RH) of 65%.
Test solution: 100mL of the equine defibrinated blood was allowed to stand at 22 ℃ and a humidity of 65% for 1 hour, and the liquids separated into the upper layer and the lower layer were mixed to adjust the mixing ratio so that the viscosity became 8.0 cP.
(2) Next, a nonwoven fabric coated with a component other than the liquid film breaking agent among the components disposed on the surface of the nonwoven fabric fiber is prepared. The amount of the above-mentioned components to be applied is determined by identifying the structure, amount and ratio of the components extracted from the nonwoven fabric. The coated nonwoven fabric to be measured was directly stuck to a petri dish having a diameter of 5cm × 5cm, and the test solution was repeatedly passed 3g at a time, and a total of 15g was passed.
(3) The surface tension of the passed liquid was measured by the plate method used in the above (1).
(4) The reduction ratio (%) of the surface tension of the body fluid after passing through the nonwoven fabric in the above (3) with respect to the surface tension of the test liquid before passing through the nonwoven fabric in the above (1) was calculated.
The present invention also provides a nonwoven fabric containing 1 or more selected from the group consisting of the following compound (C1) and the following compound (C2), wherein the reduction rate of surface tension is less than 25% in the following [ method for measuring the reduction rate of surface tension of body fluid ].
(C1) A compound having a spreading coefficient of 15mN/m or more with respect to a liquid having a surface tension of 50mN/m and a water solubility of 0g to 0.025g
(C2) A spreading factor of more than 0mN/m with respect to a liquid having a surface tension of 50mN/m, a water solubility of 0g to 0.025g, and an interfacial tension of 20mN/m or less with respect to a liquid having a surface tension of 50mN/m
[ method of measuring the rate of decrease in surface tension of body fluid ]
(1) The following test solutions were prepared. The surface tension was measured by the plate method in an ambient region at a temperature of 25 ℃ and a Relative Humidity (RH) of 65%.
Test solution: 100mL of the equine defibrinated blood was allowed to stand at 22 ℃ and a humidity of 65% for 1 hour, and the liquids separated into the upper layer and the lower layer were mixed to adjust the mixing ratio so that the viscosity became 8.0 cP.
(2) Next, a nonwoven fabric coated with components other than the compound (C1) and the compound (C2) among the components disposed on the surface of the nonwoven fabric fiber was prepared. The amount of the above-mentioned components to be applied is determined by identifying the structure, amount and ratio of the components extracted from the nonwoven fabric. The coated nonwoven fabric to be measured was directly stuck to a petri dish having a diameter of 5cm × 5cm, and the test solution was repeatedly passed 3g at a time, and a total of 15g was passed.
(3) The surface tension of the passed liquid was measured by the plate method used in the above (1).
(4) The reduction ratio (%) of the surface tension of the body fluid after passing through the nonwoven fabric in the above (3) with respect to the surface tension of the test liquid before passing through the nonwoven fabric in the above (1) was calculated.
The above and other features and advantages of the present invention will be further apparent from the following description with reference to the accompanying drawings as appropriate.
Drawings
Fig. 1 (a) is a sectional view schematically showing a laminated structure in which a liquid film cracking agent and a mixed layer of 1 or more components selected from the components (D1), (D2), and (D3) directly cover the outermost surface layer (surface) of a fiber, and fig. 1 (B) is a sectional view schematically showing a laminated structure in which an intermediate layer containing another component is sandwiched between the above mixed layer and a fiber.
Fig. 2 is a partially enlarged, schematically illustrated, cross-sectional perspective view of the raw material nonwoven fabric produced in example 1.
Detailed Description
The present invention relates to a nonwoven fabric which can simultaneously improve the performance of preventing the flow of body fluid on the surface and reduce the liquid residue by using the liquid film cleavage agent.
The present inventors have used the liquid film cleavage agent described in patent document 1 to reduce the liquid residue in the nonwoven fabric serving as the surface material.
further, in absorbent articles, reduction of liquid retention and improvement of performance of preventing body fluid from flowing on the surface are required for nonwoven fabrics which are surface materials to be in contact with the skin. The improvement of the surface liquid flow prevention performance is related to the liquid permeability in the thickness direction in the nonwoven fabric, and contributes to the improvement of the liquid leakage resistance and the liquid absorbency of the absorbent article. In the nonwoven fabric, the above documents do not describe improvement in performance of preventing the flow of body fluid on the surface and reduction in liquid retention, and there is still room for improvement.
The nonwoven fabric of the present invention can simultaneously achieve an improvement in the performance of preventing the flow of body fluid on the surface and a reduction in the liquid residue.
Preferred embodiments of the nonwoven fabric of the present invention will be described below with reference to the drawings. The nonwoven fabric of the present invention is applicable to various articles related to liquid absorption, and can be used as a topsheet of absorbent articles such as sanitary napkins, diapers for babies, and diapers for adults.
the nonwoven fabric of the present embodiment contains a liquid film-splitting agent and 1 or more components selected from the following components (D1), (D2) and (D3) (hereinafter, may be simply referred to as "components (D1) to (D3)"). As the compound having the liquid film cracking effect, 1 or more compounds selected from the compound (C1) and the compound (C2) described later (hereinafter, collectively referred to as "liquid film cracking agent" in the present specification for convenience) can be used.
(D1) Nonionic surfactant
(D2) Compound having surface tension of 42mN/m or more
(D3) A compound having a melting point of 40 ℃ or higher, being more hydrophilic than the liquid film cracking agent, and having no hydrophilic group.
The liquid film-breaking agent in the present invention is a formulation having the following properties (property of disappearing a liquid film). Specifically, the present invention refers to a preparation in which a liquid, for example, a highly viscous liquid such as menstrual blood, or an excretory fluid (body fluid) such as urine, is brought into contact with a nonwoven fabric to break a liquid film formed between fibers or on the surface of the fibers of the nonwoven fabric or to inhibit the formation of the liquid film. The liquid film cracking agent has a function of cracking a formed liquid film and a function of inhibiting the formation of the liquid film. The former is said to be the primary effect and the latter to be the secondary effect. For example, the liquid film cracking agent exhibits the functions described in paragraphs [0024] and [0025] of International publication No. 2016/098796 and FIGS. 1 and 2. As described above, the liquid film cleavage agent promotes the discharge of liquid from the nonwoven fabric by cleaving the liquid film itself generated between fibers or on the fiber surface while pushing it open, without performing liquid modification such as reduction of the surface tension of the liquid film.
Further, the components (D1), (D2) and (D3) in the present invention each have a function of improving the wettability of the nonwoven fabric fibers and making it difficult to reduce the surface tension of the body fluid forming the liquid film.
By the above-described action of the liquid film cleavage agent, the liquid (body fluid) in contact with the nonwoven fabric can easily pass through the nonwoven fabric without being retained in an extremely small space between fibers, and the liquid remaining in the nonwoven fabric can be reduced at a higher level.
on the other hand, the liquid film-splitting agent has a high spreadability on a liquid film, and therefore has a lower surface tension than conventional hydrophilizing agents and the like used for nonwoven fabric fibers. Therefore, when the nonwoven fabric contains the liquid film-splitting agent, the wettability of the nonwoven fabric fibers is slightly lowered as compared with the case where the nonwoven fabric does not contain the liquid film-splitting agent, and the surface flow of body fluid (for example, excretory fluid such as menstrual blood and urine) is likely to occur.
In contrast, in the present embodiment, the components (D1) to (D3) used in combination with the liquid film cracking agent act in a direction of improving the wettability of the nonwoven fabric fibers. By using both of them, the surface flow of the body fluid can be effectively suppressed. Further, the components (D1) to (D3) are difficult to lower the surface tension of the body fluid forming the liquid film. Thus, in the nonwoven fabric containing the components (D1) to (D3) together with the liquid film-splitting agent, the spreadability of the liquid film-splitting agent on the liquid film is maintained, and the liquid film-splitting action can be sufficiently exhibited. That is, the nonwoven fabric of the present embodiment can appropriately improve the wettability of the nonwoven fabric and effectively prevent surface flow while maintaining the effect of reducing liquid residue by the liquid film cleavage agent.
the difficulty of lowering the surface tension of the body fluid can be confirmed by the following (measurement method of the rate of lowering the surface tension of the body fluid) based on the rate of lowering the surface tension of the body fluid passing through the nonwoven fabric. It can be said that the lower the rate of decrease in surface tension of the body fluid obtained by the measurement method, the less likely the surface tension of the body fluid capable of forming a liquid film is to decrease.
In the nonwoven fabric of the present embodiment, if the reduction rate is less than 25%, the spreading factor of the liquid film cracking agent with respect to the body fluid is maintained, and the liquid film cracking action can be effectively exhibited. From this viewpoint, the reduction rate of the surface tension of the body fluid obtained by the following (method of measuring the reduction rate of the surface tension of the body fluid) is preferably 23% or less, more preferably 17% or less, further preferably 12% or less, and particularly preferably 0%.
(method of measuring the rate of decrease in surface tension of body fluid)
The degree of change in the surface tension of the body fluid passing through the nonwoven fabric to be measured was measured by the following method. When the nonwoven fabric to be measured is a member (for example, a topsheet) incorporated in an absorbent article such as a sanitary product or a disposable diaper, the measurement is performed by removing the adhesive force of the adhesive or the like by a cooling means such as cold spray. The means for removing the nonwoven fabric is the same as in the other measurements in this specification.
(1) In this measurement, the following test solutions were prepared as liquids corresponding to body fluids. The test solution was a liquid component extracted from equine defibrinated blood (manufactured by BIOTEST, japan). Specifically, when 100mL of the equine defibrinated blood was allowed to stand at 22 ℃ and 65% humidity for 1 hour, the upper layer and the lower layer of the equine defibrinated blood were separated, and the liquid obtained by mixing the upper layer liquid and the lower layer liquid and adjusting the mixing ratio so that the viscosity became 8.0cP, in the same manner as the liquid remaining amount of the nonwoven fabric sample described below, was the test liquid. The upper layer contains mainly plasma components and the lower layer contains mainly blood cell components. For example, a pipette (manufactured by MICRO corporation, Japan) may be used to remove only the upper layer from the equine defibrinated blood that has been separated into the upper and lower layers. The representative value of the surface tension was 49. + -.2 mN/m. The surface tension was measured by the plate method in an ambient region at a temperature of 25 ℃ and a Relative Humidity (RH) of 65%. At this time, a platinum plate (purity: 99.9%, 25mm in width. times.10 mm in length) and an automatic surface tensiometer "CBVP-Z" (trade name, manufactured by Kyowa interface science Co., Ltd.) were used.
(2) Next, a nonwoven fabric coated with a component other than the liquid film breaking agent among the components disposed on the surface of the nonwoven fabric fiber is prepared. The amount of the above-mentioned components to be applied is determined by identifying the structure, amount and ratio of the components extracted from the nonwoven fabric. The coated nonwoven fabric to be measured was directly stuck to a petri dish having a diameter of 5cm × 5cm, and the test solution was repeatedly passed 3g at a time, and a total of 15g was passed.
(3) The surface tension of the passed liquid was measured by the plate method used in the above (1).
(4) the reduction ratio (%) of the surface tension of the body fluid after passing through the nonwoven fabric in the above (3) with respect to the surface tension of the test liquid before passing through the nonwoven fabric in the above (1) was calculated.
(property of disappearing liquid film)
The liquid film breaking agent used in the present invention has a property of breaking a liquid film, and by this property, when the liquid film breaking agent is applied to a test solution mainly containing a plasma component or artificial urine, a liquid film breaking effect can be exhibited. The artificial urine was prepared by adjusting a mixture of 1.940 mass% urea, 0.795 mass% sodium chloride, 0.111 mass% magnesium sulfate, 0.062 mass% calcium chloride, 0.198 mass% potassium sulfate, 0.005 mass% red No. 2 (dye), water (96.882 mass%), and polyoxyethylene lauryl ether (0.07 mass%) to a surface tension of 53 ± 1mN/m (23 ℃).
The test solution is the same as the test solution described above.
The liquid film disappearing effect mentioned here includes two effects as follows: an effect of inhibiting the formation of a liquid film by a structure in which air is entrained by the liquid film formed from a test liquid or artificial urine; and an effect of disappearing the structure formed, and a preparation exhibiting at least one effect can be said to have a property capable of exhibiting a liquid film disappearing effect. Specifically, the degree of the "property of disappearing a liquid film" of a certain formulation is determined as follows: the structure is easily formed by the test solution or artificial urine to which the preparation is applied, and the amount of the structure, that is, the amount of the liquid film at that time is determined. That is, the temperature of the test solution or artificial urine was adjusted to 25 ℃ and 10g of the solution was added to a threaded pipe (No. 5 manufactured by Maruemu, 27mm in pipe diameter, 55mm in total length) to obtain a standard sample. In addition, as a measurement sample, 0.01g of the preparation to be measured, which had been adjusted to 25 ℃ in advance, was added to the same sample as the standard sample to obtain a sample. The standard sample and the measurement sample were rapidly placed on a horizontal surface after being strongly oscillated up and down for 2 times, respectively, along the above-mentioned threaded pipe. The oscillation of the sample forms a liquid layer (lower layer) without the above-described structure in the oscillated threaded pipe, and a structure layer (upper layer) containing a large number of the above-described structures formed on the liquid layer. After 10 seconds from immediately after the oscillation, the heights of the structure layers (the heights from the liquid surface of the liquid layer to the upper surface of the structure layer) of both samples were measured. Then, when the height of the structure layer of the measurement sample is 90% or less with respect to the height of the structure layer of the standard sample, it is considered that the measurement target preparation has a liquid film splitting effect.
The liquid film breaking agent used in the present invention is a single compound satisfying the above properties, a mixture obtained by combining two or more kinds of single compounds satisfying the above properties, or a preparation satisfying the above properties (capable of exhibiting liquid film breaking) by combining two or more kinds of compounds. That is, the liquid film breaking agent is defined as a preparation having a liquid film breaking effect based on the above definition. Therefore, in the case where the compound applied to the absorbent article contains a third component which does not meet the above definition, it is distinguished from the liquid film breaking agent.
In the liquid film cracking agent and the third component, "single compound" is a concept including compounds having the same composition formula but different molecular weights depending on the number of repeating units.
the liquid film cracking agent can be suitably selected and used from the contents described in paragraphs [0007] to [0186] of the specification of International publication No. 2016/098796. The preferred embodiment of the liquid film cracking agent will be described in detail later.
The nonwoven fabric of the present embodiment contains or has a liquid film breaking agent and 1 or more components selected from the components (D1), (D2) and (D3) mainly means that the components adhere to the surface of the fiber. However, the liquid film-splitting agent and the components (D1) to (D3) may be contained in the fiber or may be present in the fiber by internal addition, as long as they remain on the fiber surface. As a method for attaching the liquid film-splitting agent and the components (D1) to (D3) to the fiber surface, various methods generally used can be employed without particular limitation. Examples of the coating process include a coating process such as flexographic printing, inkjet printing, gravure printing, screen printing, spraying, and brush coating. These treatments may be performed after the fibers are formed into a web by various methods, or may be performed after the web is formed into a nonwoven fabric and incorporated into an absorbent article. The liquid film-breaking agent and the components (D1) to (D3) may be attached separately, or both components may be mixed and attached. When the fiber is attached by the above-mentioned attachment method, the liquid film-splitting agent and the coating liquid in the form of a solution, emulsion or dispersion in which the components (D1) to (D3) are dissolved in a solvent may be used as needed. When a coating liquid containing a solvent is used, the fibers having the liquid film-forming agent and the components (D1) to (D3) adhered to the surfaces thereof are dried at a temperature sufficiently lower than the melting point of the fiber resin (for example, 120 ℃ or lower) by, for example, a hot air blowing type dryer. In the case where the liquid film-splitting agent and the components (D1) to (D3) are liquid in the production environment of the nonwoven fabric or the absorbent article, the treatment can be performed without using a solvent. When the liquid film-splitting agent and the components (D1) to (D3) are applied to the fiber surface without using a solvent, particularly an organic solvent, measures such as drying treatment and explosion-proof treatment are not necessary, and it is preferable from the viewpoint of improving the production efficiency. The liquid film breaking agent and the components (D1) to (D3) may be in liquid form individually or in a mixed state. The "liquid-like" referred to herein is a liquid having fluidity suitable for coating treatment, including a semi-solid state.
In order to provide the liquid film-splitting agent with a liquid film-splitting effect described later in the nonwoven fabric, it is necessary to make the liquid film-splitting agent exist in a liquid form when it comes into contact with a body fluid. From this point of view, the melting point of the compound contained in the liquid film cracking agent is preferably 40 ℃ or lower, more preferably 35 ℃ or lower. Further, the melting point of the compound contained in the liquid film cracking agent of the present invention is preferably-220 ℃ or higher, more preferably-180 ℃ or higher.
On the other hand, the components (D1) to (D3) are preferably cured in the nonwoven fabric at the time of use. "curing" referred to herein means that the applied components (D1) to (D3) lose fluidity. Thus, when the nonwoven fabric is used, the rate of dissolution of the components (D1) to (D3) into the body fluid in contact with the nonwoven fabric is reduced, and the surface tension of the body fluid forming a liquid film can be made less likely to decrease.
In addition, the liquid film cracking agent exhibits a moderately high spreadability on droplets by moderately suppressing the viscosity. The viscosity of the liquid film cracking inhibitor is preferably moderately suppressed. Specifically, the liquid film cracking agent has a viscosity of0cps or more, preferably 6000cps or less, more preferably 600cps or less, and further preferably 200cps or less. The unit cps of viscosity is 1 cps-1 × 10 cps-3Pa · s.
(method of measuring viscosity of liquid film cracking agent)
The liquid viscosity of the liquid film cracking agent can be measured by the following method.
First, 40g of a liquid film cracking agent was prepared. Next, the liquid film cracking agent was measured for viscosity using a tuning fork vibration viscometer SV-10 (manufactured by A & D) in an ambient region at a temperature of 25 ℃ and a Relative Humidity (RH) of 65%. This was repeated 3 times, and the average value was used as the viscosity. When the liquid film cracking agent is a solid, it is heated to +5 ℃ which is the melting point of the liquid film cracking agent, and the liquid is transformed into a liquid, and the measurement is directly performed under the temperature condition.
In the measurement of the liquid film-breaking agent adhering to the fibers, the liquid film-breaking agent was extracted from the fibers based on the method used in the following (measurement methods of the mass ratio of the liquid film-breaking agent to the components (D1) to (D3) and the content ratio (OPU) in the nonwoven fabric). In this case, only a small amount can be taken out for the measurement, and the viscosity is measured in the same manner as in the case of measurement of the spreading factor and the like described later.
The liquid film-splitting agent and the components (D1) to (D3) may be mixed with a solvent or the like as needed as in the above-mentioned coating liquid to prepare a fiber-treating agent in advance. The "fiber treatment agent" described herein means: the liquid film-splitting agent in oil form having extremely low water solubility and 1 or more components selected from the group consisting of the components (D1), (D2) and (D3) are used in a form in which the raw material nonwoven fabric or fiber can be easily coated.
In the present embodiment, from the viewpoint of effectively exhibiting the above-described effects obtained by the combination, the liquid film cracking agent and the components (D1) to (D3) are preferably present as a mixed layer on the outermost surface layer of the fiber. It should be noted that, the term "mixing" as used herein means: the liquid film cracking agent and 1 or more components selected from the components (D1), (D2) and (D3) do not undergo phase separation but are mixed with each other to form a layer.
The mixed layer may be a layer composed of only the liquid film-splitting agent and 1 or more components selected from the components (D1), (D2) and (D3), and may further contain other components. The mixed layer may have various laminated structures as long as it is the outermost surface layer of the fiber. For example, a laminated structure in which the mixed layer 5 directly covers the surface of the fiber 1 as shown in fig. 1 (a) may be employed, or an intermediate layer 7 containing another component may be interposed between the mixed layer 5 and the fiber 1 as shown in fig. 1 (B). In the configuration in which the intermediate layer 7 containing another component and the mixed layer 5 composed of only the liquid film cracking agent and the components (D1) to (D3) are laminated on the surface of the fiber 1 as shown in fig. 1 (B), the liquid film cracking agent is less likely to be affected by the other component, and the liquid film cracking agent is likely to contact a body fluid, so that both reduction of surface liquid flow and liquid film cracking effect are more likely to be achieved.
As the above-mentioned "other components" that the mixed layer 5 and the intermediate layer 7 may contain, various components may be used within a range that does not impair the above-mentioned effects. In particular, as the other component, a phosphate type anionic surfactant described later is preferable, and a potassium salt of an alkyl phosphate is more preferable.
From the viewpoint of suppressing the decrease in surface tension, in the nonwoven fabric of the present embodiment, the mass ratio of the total amount of the components (D1), (D2), and (D3) to the total amount of the liquid film cracking agent (the total mass of the components (D1), (D2), and (D3)/the mass of the liquid film cracking agent) is preferably 9 or less, more preferably 4 or less, and still more preferably 2.3 or less. From the viewpoint of effectively suppressing the surface flow of the body fluid by the components (D1) to (D3), the mass ratio is preferably 0.25 or more, more preferably 0.43 or more, and still more preferably 0.53 or more. Note that "the total amount of the components (D1), (D2), and (D3)" referred to herein means the total mass of the components contained in the nonwoven fabric among the components (D1), (D2), and (D3). For example, if the nonwoven fabric contains 1 component selected from the components (D1), (D2) and (D3), the total amount of 1 component contained therein is the above-mentioned "total amount of the components (D1), (D2) and (D3"). Further, if the nonwoven fabric contains a plurality of components selected from the components (D1), (D2) and (D3), the total mass of the plurality of components contained therein is the "total amount of the components (D1), (D2) and (D3)" described above. If the nonwoven fabric contains all of the components (D1), (D2) and (D3), the total mass of all the components contained therein is the "total amount of the components (D1), (D2) and (D3)" described above.
From the viewpoint of effectively exhibiting the liquid film splitting action, the total amount of the liquid film splitting agent is preferably 0.1 mass% or more, more preferably 0.14 mass% or more, and further preferably 0.2 mass% or more, in terms of the content ratio (Oil Per Unit) with respect to the mass of the nonwoven fabric. From the viewpoint of effectively suppressing the flow of the liquid surface and improving the texture of the nonwoven fabric, the total amount of the liquid film-splitting agent is preferably 10 mass% or less, more preferably 7.5 mass% or less, and still more preferably 5 mass% or less in terms of the content ratio (OPU) relative to the mass of the nonwoven fabric.
From the viewpoint of effectively suppressing the surface flow of body fluid, the total amount of the components (D1), (D2), and (D3) is preferably 0.06% by mass or more, more preferably 0.1% by mass or more, and still more preferably 0.14% by mass or more in terms of the content ratio (OPU) relative to the mass of the nonwoven fabric. From the viewpoint of not lowering the surface tension, the total amount of the components (D1), (D2), and (D3) is preferably 3 mass% or less, more preferably 2.3 mass% or less, and still more preferably 1 mass% or less in terms of the content ratio (OPU) relative to the mass of the nonwoven fabric.
(method of measuring the liquid film cleavage agent in nonwoven Fabric, the weight ratio of the Components (D1) to (D3), and the content ratio (OPU))
The mass ratio and the content ratio (OPU) can be measured by the method described in paragraph [0018] of International publication No. 2016/098796.
After measuring the mass of the nonwoven fabric to be measured, the liquid film cleavage agent and the components (D1) to (D3) and other components (such as an adhesive) adhering to the surface material are removed using a solvent/solvent such as ethanol or water. The total mass of the liquid film cracking agent, the components (D1) to (D3), and other components was calculated from the mass of the residue.
Thereafter, the extract is separated and isolated by liquid chromatography under appropriately set measurement conditions such as column and solvent. The liquid film breaking agent, components (D1) to (D3) and other components were clarified by the mass ratio of the separated products at this time.
The mass ratio, the mass of the residue, and the mass of the nonwoven fabric used for the analysis were used to calculate the mass% of each component.
Further, which component among the separated products is the liquid film breaking agent, the components (D1) to (D3), and the other components were determined by identifying the molecular structure of the substance by the following measurement method, obtaining a corresponding structural monomer, and measuring the physical properties.
(method of identifying molecular Structure)
The molecular weight of the above-mentioned isolate is measured by any analysis method of Mass Spectrometry (MS) and Gel Permeation Chromatography (GPC).
In addition, use of1H-NMR、13C-NMR、29Si-NMR to identify the molecular skeleton, IR to identify all functional groups, elemental analysis to clarify the proportion of elements, and integration of all the above information to identify the molecular structure.
In the nonwoven fabric of the present embodiment, the components (D1), (D2) and (D3) used in combination with the liquid film cracking agent may be selected and contained in any 1 kind, may be selected and contained in 2 kinds, or may be contained in all 3 kinds. Further, as each component of the components (D1), (D2) and (D3), 1 or more selected from the following compounds may be contained. In any case, the mass ratio and the content ratio (OPU) are also calculated based on the total mass of the components (D1), (D2), and (D3) contained therein. The components (D1) to (D3) have a common function, but are different from each other as substances.
Next, the components (D1) to (D3) and the liquid film cracking agent will be described in detail.
The component (D1) in the present invention contains a nonionic surfactant. The liquid film-splitting agent-containing nonwoven fabric preferably contains, as components for increasing the hydrophilicity of the fiber surface: hydrocarbon-based nonionic surfactants and silicone-based nonionic surfactants having a hydrophobic group with lower hydrophobicity than the fluorinated hydrocarbon group. More specifically, it preferably contains: a nonionic surfactant having "an alkyl chain or a silicone chain other than the polyol fatty acid skeleton" as a hydrophobic group. The structure of the hydrophilic group of the nonionic surfactant preferably includes a polyethylene oxide type, a polyol (polyhydric alcohol) type, a block polymer type, a nitrogen-containing type, and the like.
the polyethylene oxide type nonionic surfactant preferably contains a polyoxyethylene alkyl ether, a polyoxyethylene fatty acid ester, or the like.
As the polyol (polyhydric alcohol) -type nonionic surfactant, sorbitan monoalkylate, polyoxyethylene sorbitan monoalkylate, glycerin monoalkylate, polyglyceryl monoalkylate, alkyl glucoside, pentaerythritol monoalkylate, and the like are preferably contained.
The block polymer type nonionic surfactant preferably contains an alkyl ether of polyoxyethylene polyoxypropylene glycol, polyoxyethylene polyoxypropylene alkyl ether, or the like.
The nitrogen-containing nonionic surfactant preferably contains a polyoxyethylene alkylamine, an alkylpolyoxyethylene fatty acid amide, or the like.
Among them, the hydrophilic group preferably has at least "polyoxyethylene group (hereinafter also referred to as" POE ")".
Ingredient (D1) had solubility in water alone. That is, the component (D1) is a surfactant, and its solubility in water is determined by the method shown below, taking advantage of the foamability and foam stability of the aqueous solution. Specifically, having solubility in water alone means: when a 2.5 wt% aqueous solution of the component (D1) was prepared by immersing the mixture alone in water for 20 minutes, the height of foam was 10mm or more as determined by the following measurement.
(method of measuring foaming height of aqueous solution of component (D1) after shaking)
First, 0.2g of component (D1) was weighed and poured into a screw (No. 4, tube diameter 24mm, full length 53mm, manufactured by Maruemu), and 8.0g of deionized water was further poured, and then left to stand for 20 minutes to be sufficiently dissolved in the deionized water to prepare an aqueous solution.
Next, the height of the structure layer generated by the oscillation was measured by the method described above (property of disappearing the liquid film). Specifically, the screw tube was strongly oscillated in the vertical direction for 2 times, and then rapidly placed on a horizontal surface. The height of the structure layer of the aqueous solution (height from the liquid surface of the liquid layer to the upper surface of the structure layer containing air) was measured after 10 seconds had elapsed from immediately after the oscillation. This height was defined as the height of bubbling of the aqueous solution of the component (D1) after shaking.
From the viewpoint of increasing the hydrophilicity of the fiber surface, the component (D1) preferably contains a compound having a higher HLB value than the liquid film cracking agent. The HLB value is more preferably 10 or more, further preferably 11 or more, and particularly preferably 13 or more. The HLB value is preferably 20 or less, more preferably 17 or less, and further preferably 15 or less, from the viewpoint of not increasing the solubility of the preparation in body fluids. The HLB value in the above range is obtained by appropriately setting the overall molecular weight of the nonionic surfactant by using the number of moles of addition of oxyethylene groups in the POE chain and selecting the alkyl chain length.
(method of measuring HLB value of component (D1))
HLB can be obtained by the following calculation formula.
Griffin method: HLB value-20 sum of formula weights of hydrophilic moieties/molecular weight
In the case where the molecular structure of the target component is unknown, the measurement is performed as follows: the molecular structure and molecular weight are clarified by the analytical method as described above (method for identifying molecular structure), and the structure monomer is prepared and obtained by a commercially available product or chemical synthesis as necessary, and then the measurement is performed. The means for identifying the structure and obtaining the monomers of the structure are also the same in the other assays in this specification.
From the viewpoint of suppressing the decrease in surface tension of the body fluid, the nonionic surfactant of the component (D1) preferably has the following properties and structure. This makes it possible to keep the spreadability (spreading factor described later) of the liquid film cracking agent as high as possible. That is, the liquid film is cracked or the formation of the liquid film is inhibited until the surface tension of the body fluid contacting the nonwoven fabric of the present embodiment is reduced.
The nonionic surfactant of component (D1) is preferably free of solvent during production, and is preferably liquid under the conditions of the component monomers. On the other hand, when using the manufactured nonwoven fabric, when exposed to body fluids, it is preferable that: (i) the gel-like substance (i) has a property of being gelled when exposed to a body fluid, or (ii) being solidified when exposed to a body fluid, and having a slow dissolution rate in water for the above-mentioned reason (i) or (ii). By such properties, the dissolution rate of the component (D1) in the body fluid is reduced, and the liquid film can be cracked before the surface tension of the body fluid is reduced. The term "liquid" means having fluidity, and the term "solidified" means losing fluidity.
If the melting point of the component (D1) is 5 ℃ or higher under the monomer condition, the component (D1) is easily solidified during storage of the product and can be maintained in a solid state at least until wearing, and thus the dissolution rate is easily decreased when exposed to a body fluid.
The nonionic surfactant of the component (D1) preferably contains at least 1 selected from the group consisting of (D11) and (D12) shown below.
(D11) The nonionic surfactant has a foaming height after shaking of an aqueous solution of 10mm or more, has a group consisting of only a POE group as a hydrophilic group, or has a group containing a POE group and another polyoxyalkylene (hereinafter also referred to as "POA") group (a polyoxypropylene group (hereinafter also referred to as "POP"), a polyoxybutylene group (hereinafter also referred to as "POB") or the like), and has a linear or branched hydrocarbon chain (excluding a polyol fatty acid skeleton) as a hydrophobic group.
(D12) The silicone nonionic surfactant has a foaming height after shaking of an aqueous solution of 10mm or more, has a group consisting of only a POE group as a hydrophilic group or a group containing a POE group and another POA group (also referred to as a POP group or a POB group), and has a linear or branched silicone chain as a hydrophobic group.
In the above (D11) and (D12), when the hydrophilic group contains a POE group and another POA group, the number of moles of POE group added is preferably the largest (preferably, the number of moles of oxyethylene group added is larger than that of other oxyalkylene group added) in the hydrophilic group.
In addition, in the above (D11), the following conditions are preferably satisfied.
When n is the number of moles of oxyethylene added in the POE group and X is the molecular weight,
44n/X≥0.5
(in the above formula, "0.5" is "10/20 ═ 0.5" based on HLB 10.)
In the hydrocarbon-based nonionic surfactant of (D11), the number of moles of oxyethylene added to the POE group constituting the hydrophilic group is preferably 5 moles or more, more preferably 7 moles or more, from the viewpoint of improving hydrophilicity. From the viewpoint of reducing the dissolution rate of the body fluid, the number of moles of oxyethylene added to the POE group is preferably 15 moles or less, and more preferably 10 moles or less. The hydrocarbon chain constituting the hydrophobic group preferably has an alkyl chain length of about 10 to 22 carbon atoms. From the viewpoint of reducing the dissolution rate, the number of carbon atoms is more preferably 10 or more, and still more preferably 12 or more. In addition, the number of carbon atoms is more preferably 22 or less, and still more preferably 18 or less, from the viewpoint of ease of liquefaction in time at the time of coating.
In the silicone nonionic surfactant of (D12), the number of moles of oxyalkylene groups added in the POA group including the POE group constituting the hydrophilic group is preferably 30 moles or more. For example, a silicone nonionic surfactant in which the number of moles of oxyalkylene groups added in the POA group is 30 moles or more, which contains 1 or more POE groups and the number of moles of oxyethylene groups added in the POE groups is the largest is preferable, and the silicone nonionic surfactant is POE-POP-modified silicone.
Both of the hydrophobic groups in the hydrocarbon nonionic surfactant (D11) and the silicone nonionic surfactant (D12) are preferably linear structures, because they are more easily cured than branched structures, and the surface tension of the body fluid is less likely to be lowered. More specifically, at least 1 nonionic surfactant selected from the group consisting of (D11-1), (D11-2), (D12-1) and (D12-2) described below is preferably contained. The term "linear" means that no carbon atom having not less than a tertiary carbon is contained between consecutive carbon bonds.
(D11-1) a hydrocarbon-based nonionic surfactant having a POE group with a molar number of oxyethylene added of 5 mol or more as a hydrophilic group and a linear hydrocarbon chain having about 10 to 22 carbon atoms as a hydrophobic group, wherein the hydrocarbon-based nonionic surfactant is a linear POE alkyl ether. The number of carbon atoms is preferably 12 or more from the viewpoint of reducing the dissolution rate. In addition, the number of carbon atoms is preferably 18 or less from the viewpoint of easy liquefaction at the time of coating.
(D11-2) a hydrocarbon-based nonionic surfactant which has a POP group/POE group copolymer as a hydrophilic group, the POP group having 5 or more moles of oxyethylene added to the POE group and 3 or less moles of oxypropylene added to the POP group, and which has a linear hydrocarbon chain as a hydrophobic group. From the viewpoint of improving hydrophilicity, the number of moles of oxyethylene added to the POE group is more preferably 7 moles or more. In addition, the number of moles of oxyethylene added to the POE group is preferably 15 moles or less, more preferably 10 moles or less, from the viewpoint of reducing the dissolution rate of a body fluid.
(D12-1) a silicone nonionic surfactant having a POE group in a linear silicone chain, which is a side chain-modified silicone.
(D12-2) a silicone nonionic surfactant having a side chain modified linear silicone chain, wherein a copolymer in which the number of moles of oxyethylene added to POE groups and the number of moles of oxypropylene added to POP groups are 30 moles or more in total and the number of moles of oxyethylene added to POE groups is greater than the number of moles of oxypropylene added to POP groups is used as a hydrophilic group. From the viewpoint of improving hydrophilicity, the total number of addition moles of the POE groups and POP groups is more preferably 40 moles or more. In addition, the total of the number of moles of addition of the POE group and the POP group is preferably 100 moles or less, more preferably 90 moles or less, from the viewpoint of making the viscosity easy to handle in the production process.
The nonionic surfactant of the component (D1) has the above-described structure, and in particular, the water solubility is higher than that of the liquid film cracking agent by using a hydrocarbon nonionic surfactant in which the number of moles of oxyethylene added to the POE group is 5 moles or more, or a silicone nonionic surfactant in which the number of moles of oxyalkylene added to the POA group is 30 moles or more and the number of moles of oxyethylene added to the POE group is larger than that of oxypropylene added to the POP group. Since the component (D1) is a surfactant having such water solubility, the aqueous solution has foamability and foam stability unlike the liquid film cracking agent, and therefore the height of foam after shaking of the aqueous solution can be set to 10mm or more. From the viewpoint of suitably suppressing the decrease in surface tension of the body fluid, the height of foaming of the component (D1) is preferably 20mm or less, more preferably 18mm or less, and still more preferably 15mm or less.
The melting point of the compound contained in the nonionic surfactant of the component (D1) is preferably 5 ℃ or higher, more preferably 10 ℃ or higher, and still more preferably 15 ℃ or higher, from the viewpoint of reducing the rate of solubility in body fluids. The melting point is preferably less than 25 ℃, more preferably 24 ℃ or less, and still more preferably 22 ℃ or less, from the viewpoint of easy liquefaction at the time of coating. The melting point in the above range is obtained by shortening the alkyl chain length in the nonionic surfactant or setting the number of moles of oxyethylene added to the POE group to 12 or less.
The nonionic surfactant of the component (D1) preferably has a melting point of 5 ℃ or higher and has a linear hydrocarbon chain or silicone chain, because it is solidified more as the melting point is higher and the molecular diffusion rate, i.e., the dissolution rate of linear molecules is low.
(method of measuring melting Point of component (D1))
In the case of a solid, the obtained sample was put into a vial, and the vial was placed in a constant temperature and humidity machine capable of visual observation from the outside, and after the vial was acclimated for about 30 minutes, the temperature was raised by 1 ℃ each time to observe the melting point of the substance.
In the case of a liquid, the obtained sample was put into a vial, and placed in a constant temperature and humidity machine capable of visual observation from the outside, the temperature was lowered to-20 ℃, and after the vial was allowed to stand for about 30 minutes, the temperature was raised by increasing the temperature condition by 1 ℃ each time, and the temperature at which the substance melted was observed as the melting point.
The mass average molecular weight of the nonionic surfactant of component (D1) is preferably 50 or more, more preferably 100 or more, and even more preferably 200 or more, from the viewpoint of reducing irritation to the skin. The mass average molecular weight is preferably 1500 or less, more preferably 1000 or less, and further preferably 750 or less, from the viewpoint of a melting point that is easy to handle in the production process. The mass average molecular weight of the nonionic surfactant of component (D1) can be measured by a liquid method such as GPC or liquid chromatography mass spectrometry (LC-MS). In the case of a high molecular weight, the measurement is preferably performed by GPC, and in the case of a low molecular weight, the measurement is preferably performed by LC-MS. The column and the solvent may be appropriately selected. In the first half of the measurement of the mass average molecular weight, the compound was identified by the method described above (method for identifying molecular structure) as needed.
Among the components (D1), preferable ranges satisfying the melting point and the mass average molecular weight include hydrocarbon-based nonionic surfactants having a melting point of 20 ℃ or higher, a POE group having 9 moles of oxyethylene added as a hydrophilic group, and a lauryl group as a hydrophobic group.
Next, the component (D2) will be described.
The compound contained in the component (D2) in the present invention has a surface tension of 42mN/m or more. The surface tension is higher than that of the liquid film cracking agent. By providing the compound contained in the component (D2) with the surface tension, the wettability of the fiber surface can be improved. Meanwhile, since the surface tension of the compound contained in the component (D2) is a value close to the surface tension of 50mN/m assumed as a body fluid forming a liquid film, the surface tension of the body fluid can be suppressed from decreasing even if the component (D2) is dissolved in the body fluid. This makes it possible to keep the spreadability (spreading factor described later) of the liquid film cracking agent as high as possible. From this viewpoint, the surface tension of the compound contained in the component (D2) is preferably 42.5mN/m or more, and more preferably 43mN/m or more. From the viewpoint of hydrophilicity, the surface tension of the compound contained in the component (D2) is preferably 60mN/m or less, more preferably 55mN/m or less, and still more preferably 50mN/m or less.
(method of measuring surface tension of Compound contained in component (D2))
The surface tension of the compound contained in the component (D2) was measured by the plate method in an environmental region at a temperature of 25 ℃ and a Relative Humidity (RH) of 65%. At this time, a platinum plate (purity: 99.9%, 25mm in width. times.10 mm in length) and an automatic surface tensiometer "CBVP-Z" (trade name, manufactured by Kyowa interface science Co., Ltd.) were used.
The component (D2) preferably contains a compound having no hydrophobic structure and consisting of only a structure having a hydrophilic group in order to produce a component having the above surface tension. The structure having a hydrophilic group includes a structure having a POE group or a structure having a block copolymer of a POE group and a POP group. The term "having no hydrophobic structure" refers to a structure having no alkyl chain, silicone chain or fluorine chain having 5 or more carbon atoms.
as the compound of the component (D2), a compound containing: polyethylene glycol (PEG) containing a POE group, or a copolymer of a POE compound and a POP compound, more preferably polyethylene glycol or polypropylene glycol or a copolymer thereof.
From the viewpoint of suppressing volatility, the mass average molecular weight of the compound contained in the component (D2) is preferably 200 or more, more preferably 300 or more, and still more preferably 400 or more. The mass average molecular weight is preferably 10000 or less, more preferably 8000 or less, and further preferably 6000 or less, from the viewpoint of achieving a viscosity that is easy to apply.
In the case where the compound contained in the component (D2) is a copolymer of a POE compound and a POP compound, the polymerization ratio of the POP compound to the POE compound (the polymerization degree of POP/the polymerization degree of POE) is preferably more than 0, more preferably 5 or more, and still more preferably 6.5 or more, from the viewpoint of suppressing the rate of dissolution in body fluids. From the viewpoint of improving hydrophilicity, the polymerization ratio is preferably 10 or less, more preferably 8 or less, and further preferably 7 or less in terms of a mass ratio.
The component (D2) more preferably contains polyethylene glycol having a mass average molecular weight of 400, and a compound obtained by polymerizing polyethylene glycol and polypropylene glycol at a mass ratio of about 1: 7.
Next, the component (D3) will be described.
the melting point of the compound contained in the component (D3) in the present invention is 40 ℃ or higher, and the compound is more hydrophilic than the liquid film-breaking agent. This makes the fiber insoluble even at body temperature, hardly soluble in body fluid, and capable of improving wettability of the fiber surface. Reference herein to "more hydrophilic than a liquid film breaker" means: the ratio of the Inorganic value to the Organic value of a substance, i.e., the value of "Inorganic value/Organic value" (Inorganic Organic Balance value, hereinafter referred to as IOB value) is greater than the IOB value of the liquid film cracking agent. Thus, the component (D3) has a property of improving the liquid flow property when mixed with a liquid film cracking agent and applied. It is known that IOB values approximately have a correlation relationship of "HLB ═ IOB × 10".
The IOB value can be calculated by the method described in Japanese patent laid-open No. 2016 and 107100, paragraphs [0031] to [0036] based on the inorganic value and the organic value described in tables 1 to 3 below.
[ Table 1]
TABLE 1 inorganic groups Table
Note that 1) R represents an alkyl group, φ represents an alkyl group, a phenyl group or the like.
Note that 2) carbon in the inorganic group is accumulated in the organic property. The carbon in the group having both organic properties is considered to have accumulated in both organic properties.
Note 3) addition of quinoline nucleus and pyridine nucleus ═ N-70.
Note 4) Organic Value (OV) ═ Cn × 20 "+" organic value of inorganic group having both organic property "+" branched chain
Inorganic Value (IV) ═ value of inorganic group "+" inorganic value of inorganic group having both organic and inorganic groups
[ Table 2]
TABLE 2 preparation of the use of "inorganic groups Table
[ Table 3]
TABLE 3 preparation of the use of "inorganic groups Table
The IOB value of the compound contained in the component (D3) is preferably 0.7 or more and 0.9 or less. From the viewpoint of suppressing the water solubility of the component (D3) and suppressing the decrease in the surface tension of the body fluid, the IOB value is preferably 0.9 or less, and more preferably 0.85 or less. From the viewpoint of providing component (D3) with a function as a wetting agent for hydrophilizing a solid surface, the IOB value is preferably 0.7 or more, and more preferably 0.75 or more. Specifically, it is more preferably 0.7 or more and 0.9 or less, and still more preferably 0.75 or more and 0.85 or less.
On the other hand, when the compound contained in the liquid film cracking agent is the compound (C1), the IOB value of the compound (C1) is preferably 0.3 or more, more preferably 0.45 or more, and even more preferably 0.55 or more, from the viewpoint of reducing the interfacial tension and exhibiting high spreadability on a liquid, and is preferably 0.8 or less, more preferably 0.7 or less, and even more preferably 0.65 or less, from the viewpoint of maintaining water insolubility. Specifically, when the compound contained in the liquid film cracking agent is the compound (C1), the IOB value of the compound (C1) is preferably 0.3 or more and 0.8 or less, more preferably 0.45 or more and 0.7 or less, and still more preferably 0.55 or more and 0.65 or less. In the case where the compound contained in the liquid film cracking agent is the compound (C2), the IOB value of the compound (C2) is preferably 0 or more, more preferably 0.05 or more, and even more preferably 0.1 or more, from the viewpoint of reducing the interfacial tension and exhibiting high spreadability on a liquid, and is preferably 0.6 or less, more preferably 0.5 or less, and even more preferably 0.4 or less, from the viewpoint of maintaining water insolubility. Specifically, when the compound contained in the liquid film cracking agent is the compound (C2), the IOB value of the compound (C2) is preferably 0 or more and 0.6 or less, more preferably 0.05 or more and 0.5 or less, and still more preferably 0.1 or more and 0.4 or less.
The melting point of the compound contained in the component (D3) is 40 ℃ or higher (temperature at which the compound does not dissolve even at body temperature), preferably 50 ℃ or higher, and more preferably 60 ℃ or higher, from the viewpoint of being difficult to dissolve even when exposed to body fluids. From the viewpoint of coating while applying temperature adjustment, the melting point is preferably 120 ℃ or less, more preferably 110 ℃ or less, and still more preferably 100 ℃ or less. The melting point in the above range is obtained by converting the component (D3) into a hydrocarbon compound having 2 or more amide groups in the molecule. That is, the component (D3) preferably contains a diamide compound having a melting point of 40 ℃ or higher.
The compound contained in the component (D3) has no hydrophilic group. That is, it is composed only of a structure having a hydrophobic group. The "hydrophilic group" referred to herein means an anionic group such as a POE group, a sodium sulfonate salt, a potassium phosphate salt, or a cationic group such as a quaternary ammonium salt. In addition, "consisting only of a structure having a hydrophobic group" means consisting only of an alkyl chain. Thus, the water solubility of the component (D3) is low. Specifically, the water solubility of the compound contained in the component (D3) is 0.01g or less, preferably 0.001g or less, and more preferably less than 0.0001 g.
The component (D3) does not have a hydrophilic group, and thus the dissolution rate with respect to body fluid is suppressed, and the surface tension of body fluid is less likely to be lowered. This makes it possible to keep the spreadability (spreading factor described later) of the liquid film cracking agent as high as possible with the component (D3). That is, the liquid film is cracked or the formation of the liquid film is inhibited until the surface tension of the body fluid contacting the nonwoven fabric of the present embodiment is reduced.
From the viewpoint of suppressing volatility, the mass average molecular weight of the compound contained in the component (D3) is preferably 200 or more, more preferably 300 or more, and still more preferably 400 or more. The mass average molecular weight is preferably 5000 or less, more preferably 4000 or less, and still more preferably 3000 or less, from the viewpoint of achieving a viscosity that is easy to apply.
The component (D3) preferably contains a chain hydrocarbon compound which is more hydrophilic than the liquid film cracking agent and has no hydrophilic group, and in the hydrocarbon compound, by having 2 or more amide groups in total in the molecule in the middle and near the end of the continuous hydrocarbon chain, the component (D3) can be more hydrophilic than the liquid film cracking agent and can have a higher melting point.
The component (D3) more preferably contains a diamide compound such as N' -N-bis (3-methoxypropyl) isobehenamide.
Next, preferred embodiments of the liquid film cracking agent of the present invention will be described. A preferable embodiment of the liquid film cracking agent may include the liquid film cracking agents described in paragraphs [0013] to [0088] of International publication No. 2016/098796. Specifically, the liquid film cracking agent of the first and second embodiments described below may be included.
The liquid film cracking agent of the first embodiment has a spreading factor of 15mN/m or more with respect to a liquid having a surface tension of 50mN/m, and has a water solubility of 0g to 0.025 g. The compound having such a property is sometimes referred to as compound (C1).
The spreading coefficient of the compound contained in the liquid film cracking agent of the second embodiment is greater than 0mN/m, i.e., a positive value, with respect to a liquid having a surface tension of 50mN/m, the water solubility is 0g or more and 0.025g or less, and the interfacial tension with respect to a liquid having a surface tension of 50mN/m is 20mN/m or less. The compound having such a property is sometimes referred to as compound (C2).
The definition of "spreading factor with respect to a liquid having a surface tension of 50 mN/m" and "water solubility" possessed by the compound contained in the liquid film-splitting agent defined in the first and second embodiments, and the surface tension (γ) of the liquid film (liquid having a surface tension of 50 mN/m)w) Surface tension (gamma) of liquid film cracking agento) Interfacial tension (gamma) between the liquid film cracking agent and the liquid filmwo) And the method for measuring the water solubility of the liquid film-splitting agent are described in International publication No. 2016/098796 [0015]]～[0022]The above-mentioned values are values obtained based on the following equation (1) in an environment region of 25 ℃ and 65% Relative Humidity (RH). Need to make sure thatThe liquid film in the formula (1) is a liquid phase of "a liquid having a surface tension of 50 mN/m", and includes both a liquid in a state in which a film is developed between fibers and on the surface of the fibers and a liquid before the film is developed, and is also simply referred to as a liquid. The surface tension of the formula (1) is an interfacial tension at an interface between a liquid film and a gas phase of a liquid film cracking agent, and is distinguished from an interfacial tension between a liquid phase and a liquid film between a liquid film cracking agent and a liquid film. This distinction is also the same in other descriptions of the present specification.
S＝γw-γo-γwo·····(1)
γw: surface tension of liquid film (liquid)
γo: surface tension of liquid film cracking agent
γwo: interfacial tension of liquid film cracking agent and liquid film
The spreading coefficient of the compound contained in the liquid film cracking agent of the first embodiment is set to 15mN/m or more, so that the liquid film cracking agent has high mobility, i.e., high diffusibility, in moving on the surface of the liquid film generated in the narrow space region between the fibers. Further, the liquid film cracking agent has spreadability in which the liquid film cracking agent moves from the position of the fiber constituting the nonwoven fabric to another region. From the viewpoint of sufficiently exhibiting these spreadability properties, the spreading coefficient of the compound contained in the liquid film opener is more preferably 20mN/m or more, still more preferably 25mN/m or more, and particularly preferably 30mN/m or more. On the other hand, the upper limit is not particularly limited, and according to the above formula (1), when a liquid having a surface tension of 50mN/m is used, the upper limit is 50mN/m, when a liquid having a surface tension of 60mN/m is used, the upper limit is 60mN/m, when a liquid having a surface tension of 70mN/m is used, the upper limit is 70mN/m, and thus the surface tension of the liquid forming the liquid film becomes the upper limit. Therefore, in the present invention, the upper limit is 50mN/m or less from the viewpoint of using a liquid having a surface tension of 50 mN/m.
In addition, in the liquid film cracking agent of the first embodiment, by setting the water solubility of the compound contained in the liquid film cracking agent to 0g or more and 0.025g or less, the liquid film cracking agent is hardly dissolved to form a liquid film together with the liquid filmthe interface (2) makes the above diffusibility more effective. From the same viewpoint, the water solubility of the compound contained in the liquid film cracking agent is preferably 0.0025g or less, more preferably 0.0017g or less, and further preferably less than 0.0001 g. The lower the water solubility, the better, 0g or more, and from the viewpoint of diffusibility in a liquid film, the water solubility is actually 1.0X 10-9g is above. The water solubility is also considered to be suitable for menstrual blood, urine, and the like containing water as a main component.
The liquid film cracking agent of the first embodiment preferably further contains a compound having an interfacial tension of 20mN/m or less with respect to a liquid having a surface tension of 50 mN/m. That is, 1 variable for determining the value of the spreading factor (S) in the above equation (1), that is, "interfacial tension (γ) between the liquid film-splitting agent and the liquid filmwo) "preferably 20mN/m or less. By "interfacial tension (gamma) of the liquid film cleavage agent and the liquid filmwo) "the suppression is low, the spreading factor of the liquid film cracking agent is increased, the liquid film cracking agent easily moves from the fiber surface to the vicinity of the center of the liquid film, and the above-mentioned effects become more remarkable. From this viewpoint, "the interfacial tension with respect to a liquid having a surface tension of 50 mN/m" of the compound contained in the liquid film opener "is more preferably 17mN/m or less, still more preferably 13mN/m or less, still more preferably 10mN/m or less, particularly preferably 9mN/m or less, and particularly preferably 1mN/m or less. On the other hand, the lower limit is not particularly limited, and may be more than 0mN/m from the viewpoint of insolubility in a liquid film. When the interfacial tension is 0mN/m, that is, when dissolution occurs, an interface cannot be formed between the liquid film and the liquid film breaking agent, and therefore, the formula (1) does not hold, and spreading of the preparation cannot occur.
As can be seen from the mathematical expression, the value of the spreading coefficient changes due to the surface tension of the liquid to be treated. For example, when the surface tension of the liquid to be treated is 72mN/m, the surface tension of the liquid film opener is 21mN/m, and the interfacial tension thereof is 0.2mN/m, the spreading factor reaches 50.8 mN/m.
when the surface tension of the liquid to be treated was 30mN/m, the surface tension of the liquid film opener was 21mN/m, and the interfacial tension thereof was 0.2mN/m, the spreading coefficient reached 8.8 mN/m.
In any case, the greater the spreading factor, the greater the liquid film splitting effect.
In the present specification, the numerical value when the surface tension is 50mN/m is defined, but the numerical value of the spreading coefficient of each substance does not change in magnitude even when the surface tension is different, and therefore, even if the surface tension of the body fluid changes depending on daily physical conditions or the like, the more excellent effect of splitting the liquid film is exhibited as the spreading coefficient of the preparation is increased.
The surface tension of the compound contained in the liquid film cracking agent of the first embodiment is preferably 32mN/m or less, more preferably 30mN/m or less, still more preferably 25mN/m or less, and particularly preferably 22mN/m or less. The lower the surface tension, the better, and the lower limit is not particularly limited. From the viewpoint of durability of the liquid film cracking agent, it is 1mN/m or more, and may be 20mN/m or more.
by setting the surface tension of the liquid film breaking agent to be equal to or less than the above-described range, the liquid film breaking action can be effectively exerted even when the surface tension of the object liquid spreading the liquid film is decreased.
Next, setting the "interfacial tension with respect to a liquid having a surface tension of 50 mN/m" of 20mN/m or less for the compound included in the liquid film cracking agent of the second embodiment means that the diffusibility of the liquid film cracking agent on the liquid film is improved as described above. Accordingly, even when the spreading factor is small, such as "spreading factor with respect to a liquid having a surface tension of 50 mN/m" being less than 15mN/m, the spreading factor is high, and therefore, a large amount of the liquid film cracking agent is dispersed from the fiber surface into the liquid film, and the liquid film is pushed away at a plurality of positions, whereby the same action as in the case of the first embodiment can be exerted.
From the viewpoint of making the above-described action of the liquid film opener more effective, the "interfacial tension with respect to a liquid having a surface tension of 50 mN/m" of the compound included in the liquid film opener of the second embodiment is preferably 17mN/m or less, more preferably 13mN/m or less, still more preferably 10mN/m or less, still more preferably 9mN/m or less, and particularly preferably 1mN/m or less. The lower limit value is not particularly limited as in the first embodiment, and may be set to be substantially higher than 0mN/m or 3mN/m or more from the viewpoint of not dissolving in a liquid film (liquid having a surface tension of 50 mN/m).
further, from the viewpoint of making the above-described action of the liquid film cracking agent more effective, "spreading coefficient with respect to a liquid having a surface tension of 50 mN/m" is preferably 9mN/m or more, more preferably 10mN/m or more, and still more preferably 15mN/m or more. The upper limit is not particularly limited, but is substantially 50mN/m or less from the viewpoint that the surface tension of the liquid forming the liquid film according to the formula (1) is the upper limit.
The more preferable ranges of the surface tension and the water solubility of the compound contained in the liquid film cleavage agent of the second embodiment are the same as those of the first embodiment.
As described above, by making the compound contained in the liquid film breaking agent of the first embodiment have the above spreading factor and water solubility, and by making the compound contained in the liquid film breaking agent of the second embodiment have the above spreading factor, interfacial tension and water solubility, it spreads on the surface of the liquid film without dissolving, and the layer of the liquid film can be pushed away from the vicinity of the center of the liquid film. This destabilizes the liquid film and causes cracking.
The nonwoven fabric including the liquid film cleavage agent of the first embodiment and the nonwoven fabric including the liquid film cleavage agent of the second embodiment preferably further contain a phosphate ester type anionic surfactant. This increases the hydrophilicity and wettability of the fiber surface, and increases the contact area between the liquid film and the liquid film cracking agent. Further, since blood and urine have a surface active material derived from a living body and having a phosphate group, when a surfactant having a phosphate group is used in combination with a liquid film breaking agent, the surfactant has compatibility with the liquid film breaking agent, and further has good affinity with phospholipid contained in blood and urine. Therefore, the liquid film cracking agent is easily moved to the liquid film, and the cracking of the liquid film is further promoted. The content ratio of the total amount of the liquid film cracking agent to the total amount of the phosphate ester type anionic surfactant is preferably 1:1 to 19:1, more preferably 2:1 to 15:1, and further preferably 3:1 to 10:1 in terms of a mass ratio (liquid film cracking agent: phosphate ester type anionic surfactant). In particular, the content ratio is preferably 5:1 to 19:1, more preferably 8:1 to 16:1, and further preferably 11:1 to 13:1 in terms of mass ratio.
The phosphate ester type anionic surfactant is not particularly limited and may be used. For example, the surfactant described in paragraph [0031] of International publication No. 2016/098796 may be contained.
Next, specific examples of the liquid film cracking agent in the first embodiment and the second embodiment will be described. They have the property of being insoluble in water or water and exert the action of breaking the liquid film because they are within the above-specified numerical range. On the other hand, a surfactant or the like used as a conventional fiber treatment agent is practically used by being dissolved in water, and is basically water-soluble, and is not the liquid film breaking agent of the present invention.
The liquid film cracking agent in the first and second embodiments preferably contains a compound having a mass average molecular weight of 500 or more. This mass average molecular weight significantly affects the viscosity of the liquid film cracking agent. The compound contained in the liquid film cracking agent keeps the viscosity high, so that the liquid is not easy to flow down when passing through the fiber space, and the continuity of the liquid film cracking effect of the nonwoven fabric can be kept. The mass average molecular weight of the compound contained in the liquid film cracking agent is more preferably 1000 or more, still more preferably 1500 or more, and particularly preferably 2000 or more, from the viewpoint of achieving a viscosity that sufficiently sustains the liquid film cracking effect. On the other hand, from the viewpoint of viscosity of the liquid film cracking agent, which is maintained in micro-diffusibility and macro-diffusibility, in other words, from the fibers in which the liquid film cracking agent is disposed, the viscosity is preferably 50000 or less, more preferably 20000 or less, and still more preferably 10000 or less. The mass average molecular weight was measured by using GPC "CCPD" (trade name, manufactured by Tosoh corporation). The measurement conditions are as follows. The calculation of the converted molecular weight was performed using polystyrene.
Separating the column: GMHHR-H + GMHHR-H (cation)
eluent: l Farmin DM20/CHCl3
Flow rate of solvent: 1.0mL/min
Temperature of the separation column: 40 deg.C
In addition, as the liquid film cracking agent in the first embodiment, it is preferable that: as described later, the compound having at least 1 structure selected from the following structures X, X-Y and Y-X-Y is included.
structure X represents>C (A) to C (C) represent a carbon atom. In addition, the first and second substrates are,<、>And-represents a bond. The same applies hereinafter. -C (A)2-、-C(A)(B)-、>C(A)-C(R1)<、>C(R1)-、-C(R1)(R2)-、-C(R1)2-、>C<、-Si(R1)2O-、-Si(R1)(R2) A siloxane chain having a structure in which 2 or more kinds of basic structures of O-are repeated or combined, or a mixed chain thereof. Having a hydrogen atom at the terminus of structure X, or selected from-C (A)3、-C(A)2B、-C(A)(B)2、-C(A)2-C(R1)3、-C(R1)2A、-C(R1)3、-OSi(R1)3、-OSi(R1)2(R2)、-Si(R1)3、-Si(R1)2(R2) At least 1 group.
R mentioned above1、R2Each independently represents a hydrogen atom, an alkyl group (preferably having 1 to 20 carbon atoms, for example, preferably a methyl group, an ethyl group, or a propyl group), an alkoxy group (preferably having 1 to 20 carbon atoms, for example, preferably a methoxy group or an ethoxy group), an aryl group (preferably having 6 to 20 carbon atoms, for example, preferably a phenyl group), a halogen atom (for example, preferably a fluorine atom), or other substituent. A. Each B independently represents 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. A plurality of R are respectively present in the structure X1、R2A, B, they may be the same or different from each other. The bond between consecutive C (carbon atom) and Si is usually a single bond, but may include double bond and triple bond C, SiThe bond(s) may also contain ether groups (-O-), amide groups (-CONR)A-：RAa hydrogen atom or a monovalent group), an ester group (-COO-), a carbonyl group (-CO-), a carbonate group (-OCOO-), and the like. The number of bonds between one C and Si and the other C or Si is 1 to 4, and there may be a case where a long silicone chain (siloxane chain) or a mixed chain is branched or has a radial structure.
y represents a hydrophilic group having hydrophilicity and containing an atom selected from the group consisting of a hydrogen atom, a carbon atom, an oxygen atom, a nitrogen atom, a phosphorus atom, and a sulfur atom. Examples of the hydrophilic group include a single hydrophilic group such as a hydroxyl group, a carboxylic acid group, an amino group, an amide group, an imino group, a phenol group, a POA group (the number of carbons of an oxyalkylene group is preferably 1 to 4. for example, POE group or POP group), a sulfonic acid group, a sulfuric acid group, a phosphoric acid group, a sulfobetaine group, a carbonylbetaine group, a phosphobetaine group (these betaine groups are betaine residues obtained by removing 1 hydrogen atom from each betaine compound), a quaternary ammonium group, and the like, or a combination thereof. In addition to these, M described later may be mentioned1Groups and functional groups recited in (1). When a plurality of Y are used, they may be the same or different from each other.
In the structures X-Y and Y-X-Y, Y is bonded to X or to the terminal group of X. In the case where Y is bonded to the terminal group of X, the terminal group of X is bonded to Y by removing the same number of hydrogen atoms and the like as the number of bonds to Y, for example.
In this structure, the hydrophilic group Y, A, B is selected from the specifically described groups so as to satisfy the spreading factor, water solubility, and interfacial tension. Thus, the intended liquid film cracking effect is exhibited.
the liquid film cleavage agent preferably contains a compound in which the structure X is a siloxane structure. Further, the liquid film cracking agent preferably contains: a compound containing a siloxane chain obtained by arbitrarily combining structures represented by the following formulae (1) to (11) as specific examples of the above-mentioned structures X, X-Y, Y-X-Y. Further, from the viewpoint of the liquid film cracking effect, the compound preferably has a mass average molecular weight within the above range.
[ chemical formula 1]
in the formulae (1) to (11), M1、L1、R21And R22Represents the following 1-valent or multi-valent (2-valent or more than 2-valent) group. R23And R24Represents a group having 1 or more valences (2 or more valences) or a single bond.
M1Represents: a group having a POE group, a POP group, a POB group, or a POA group obtained by combining these groups; a hydrophilic group having a plurality of hydroxyl groups such as an erythritol group, a xylitol group, a sorbitol group, a glyceryl group, or a glycol group (a hydrophilic group obtained by removing 1 hydrogen atom from the above-mentioned compound having a plurality of hydroxyl groups such as erythritol), a hydroxyl group, a carboxylic acid group, a mercapto group, an alkoxy group (preferably having 1 to 20 carbon atoms, for example, preferably a methoxy group), an amino group, an amide group, an imino group, a phenol group, a sulfonic acid group, a quaternary ammonium group, a sulfobetaine group, a hydroxysulfobetaine, a phosphobetaine, an imidazolium betaine, a carbonylbetaine, an epoxy group, a carbinol group, a (meth) acryloyl group, or a functional group obtained by combining these groups. In addition, in M1in the case of a polyvalent radical, M1Each of the groups or functional groups is a group obtained by further removing 1 or more hydrogen atoms.
L1Represents an ether group or an amino group (which may be L)1With amino groups > NRC(RCHydrogen atom or monovalent group). ) Amide group, ester group, carbonyl group, and carbonate group.
R21、R22、R23And R24Each independently represents an alkyl group (preferably having 1 to 20 carbon atoms, for example, preferably methyl, ethyl, propyl, isopropyl, butyl, pentyl, hexyl, heptyl, 2-ethylhexyl, nonyl, decyl), an alkoxy group (preferably having 1 to 20 carbon atoms, for example, preferably methoxy, ethoxy), an aryl group (preferably having 6 to 20 carbon atoms, for example, preferably phenyl), a fluoroalkyl group, or an aralkyl group, or a hydrocarbon group obtained by combining these groups, or a halogen atom (for example, preferably a fluoro atom), or a halogen atom (for example, a fluorine atom)And (4) adding the active ingredients. ). In addition, in R22And R23The polyvalent group means a polyvalent hydrocarbon group obtained by further removing 1 or more hydrogen atoms or fluorine atoms from the above hydrocarbon group.
In addition, in R22Or R23And M1In the case of bonding, R can be defined as22Or R23examples of the group to be used include those other than the above-mentioned groups, the above-mentioned hydrocarbon group and halogen atom32The imino group used.
As for the liquid film cracking agent, among them, the following compounds are preferably contained: the compound has a structure represented by any one of the formulae (1), (2), (5) and (10) as X, and has a structure represented by any one of the formulae other than the formulae as the terminal of X or a group containing the terminal of X and Y. More preferably, the silicone composition contains a compound containing a silicone chain in which X or a group containing the end of X and Y has at least 1 structure represented by any one of the above formulae (2), (4), (5), (6), (8), and (9).
Specific examples of the above-mentioned compounds include organically modified silicones (polysiloxanes) as silicone surfactants. Examples of the organic modified silicone modified with a reactive organic group include: amino-modified, epoxy-modified, carboxyl-modified, glycol-modified, methanol-modified, (meth) acrylic-modified, mercapto-modified, phenol-modified. Examples of the organic-modified silicone modified with a non-reactive organic group include: polyether modification (including POA modification), methyl styryl modification, long-chain alkyl modification, higher fatty acid ester modification, higher alkoxy modification, higher fatty acid modification, fluorine modification, and the like. Depending on the type of these organic modifications, the spreading factor that acts to break the liquid film can be obtained by appropriately changing the molecular weight of the silicone chain, the modification ratio, the number of moles of the modifying groups added, and the like. Here, the "long chain" means a substance having 12 or more, preferably 12 to 20 carbon atoms. The term "higher" means a substance having 6 or more, preferably 6 to 20 carbon atoms.
Among these, the liquid film cleavage agent as the modified silicone, such as the POA-modified silicone, the epoxy-modified silicone, the carbinol-modified silicone, and the glycol-modified silicone, is preferably a modified silicone having a structure in which at least one oxygen atom is contained in a modified group, and particularly preferably a POA-modified silicone. The POA-modified silicone has POA chains, and is difficult to penetrate into the fibers and easily remains on the surface. Further, addition of a hydrophilic polyoxyalkylene chain is preferable because the affinity with water is improved and the interfacial tension is low, and therefore the polyoxyalkylene chain easily moves on the surface of the liquid film. Therefore, the liquid film is preferably moved easily on the surface of the liquid film. Even when hot melt processing such as embossing is performed, the POA-modified silicone is likely to remain on the surface of the fiber in this portion, and the liquid film cracking effect is less likely to be reduced. In particular, it is preferable that the liquid film cracking function is sufficiently exhibited in the embossed portion where liquid is likely to accumulate.
Examples of the POA-modified silicone include silicones represented by the following formulas [ I ] to [ IV ]. In addition, the POA-modified silicone preferably has a mass average molecular weight within the above range from the viewpoint of a liquid film cracking effect.
[ chemical formula 2]
[ chemical formula 3]
[ chemical formula 4]
[ chemical formula 5]
In the formula, R31Represents an alkyl group (preferably having 1 to 20 carbon atoms, for example, methyl, ethyl, propyl, isopropyl, butyl, pentyl, hexyl, heptyl, 2-ethylhexyl, nonyl, decyl). R32To representthe single bond or alkylene group (preferably having 1 to 20 carbon atoms, for example, preferably methylene, ethylene, propylene, butylene) preferably represents the above alkylene group. Plural R31A plurality of R32Each of which may be the same or different from each other. M11Represents a group having a POA group, and preferably a POA group. Examples of the POA group include a POE group, a POP group, a POB group, and a group obtained by copolymerizing constituent monomers thereof. m and n are each independently an integer of 1 or more. The symbols of these repeating units are represented by the following formula [ I ]]～[IV]The terms (A) and (B) in (B) are not necessarily the same, and may be different.
the POA-modified silicone may have a modification group of either or both of POE modification and POP modification. In addition, in order to be insoluble in water and have a low interfacial tension, it is desirable that the alkyl group R in the silicone chain is31Having a methyl group thereon. The substance having such a modified group and a silicone chain is not particularly limited, and for example, Japanese patent laid-open publication No. 2002-]And [0012 ]]The substance of paragraph. More specifically, POE-POP modified silicone, POE modified silicone, POP modified silicone, and the like can be mentioned. Examples of the POE modified silicone include POE (3) modified dimethyl silicone to which 3 moles of POE are added. Examples of POP-modified silicones include POP (10) -modified dimethylsilicone, POP (12) -modified dimethylsilicone, and POP (24) -modified dimethylsilicone, to which 10, 12, or 24 moles of POP are added.
The spreading factor and the water solubility of the compound included in the first embodiment can be set to predetermined ranges, for example, by the number of moles of the POA groups added (the number of bonds between oxyalkylene groups forming the POA groups and 1 mole of POA-modified silicone), the modification ratio described below, and the like. In the compound contained in the liquid film cracking agent, the surface tension and the interfacial tension may be similarly set to predetermined ranges, respectively.
From the above viewpoint, the number of moles of the POA groups added is preferably 1 or more. When the lower limit value is set to be equal to or higher than the lower limit value, the interfacial tension is low for the liquid film cracking action, and therefore the spreading factor is increased, and a sufficient liquid film cracking effect can be obtained. From the same viewpoint, the number of addition mols is more preferably 3 or more, and still more preferably 5 or more. On the other hand, the number of addition mols is preferably 30 or less, more preferably 20 or less, and still more preferably 10 or less. When the number of addition mols is not more than the upper limit, the water solubility can be kept low by exhibiting hydrophobicity.
In order to maintain hydrophilicity necessary for the liquid film cleavage effect (particularly spreadability), the modification ratio of the modified silicone is preferably 5% or more, more preferably 10% or more, and still more preferably 20% or more. The modification ratio of the modified silicone is preferably 95% or less, more preferably 70% or less, and still more preferably 40% or less, in order to maintain the water insolubility required for the liquid film cleavage action. The modification ratio of the modified silicone is: a ratio of the number of repeating units of the modified siloxane bond to the total number of repeating units of the siloxane bond in 1 molecule of the modified silicone. For example, (n/m + n). times.100% in the above formulas [ I ] and [ IV ], (2/m). times.100% in the formula [ II ], and (1/m). times.100% in the formula [ III ].
In addition to the above-mentioned embodiments, the spreading factor and the water solubility of the POA-modified silicone may be set to predetermined ranges by using a water-soluble POE group, a water-insoluble POP group, and a POB group in combination as modifying groups, changing the molecular weight of a water-insoluble silicone chain, introducing an amino group, an epoxy group, a carboxyl group, a hydroxyl group, a methanol group, or the like as modifying groups in addition to the POA modification, or the like.
The polyalkylene-modified silicone used as the liquid film-splitting agent is preferably contained in an amount of 0.02 mass% or more and 5 mass% or less in terms of the content (Oil Per Unit) based on the mass of the nonwoven fabric. The content ratio (OPU) of the polyalkylene-modified silicone is more preferably 1% by mass or less, and still more preferably 0.4% by mass or less. In this way, the nonwoven fabric has a preferable feel. From the viewpoint of sufficiently exhibiting the liquid film splitting effect by the polyalkylene-modified silicone, the content (OPU) is more preferably 0.04% by mass or more, and still more preferably 0.1% by mass or more. At this time, the liquid film cracking agent may contain a compound other than the polyalkylene modified silicone. The total amount of the liquid film-breaking agent in this case is preferably in the above range.
The nonwoven fabric quality referred to herein means the fiber quality of the entire nonwoven fabric (the same applies to the content ratio (OPU) described below).
As the liquid film cleavage agent of the second embodiment, as described later, a compound having at least 1 structure selected from the following structures Z, Z-Y and Y-Z-Y is preferably contained.
Structure Z represents a group consisting of > C (A) - (C: carbon atom), -C (A)2-、-C(A)(B)-、＞C(A)-C(R3)＜、＞C(R3)-、-C(R3)(R4)-、-C(R3)2A hydrocarbon chain having a structure in which 2 or more basic structures are repeated or combined. Having a hydrogen atom at the terminus of structure Z, or having a structure selected from-C (A)3、-C(A)2B、-C(A)(B)2、-C(A)2-C(R3)3、-C(R3)2A、-C(R3)3At least 1 group.
R mentioned above3、R4Each independently represents a hydrogen atom, an alkyl group (preferably having 1 to 20 carbon atoms, for example, methyl, ethyl, propyl, isopropyl, butyl, pentyl, hexyl, heptyl, 2-ethylhexyl, nonyl, decyl), an alkoxy group (preferably having 1 to 20 carbon atoms, for example, methoxy, ethoxy), an aryl group (preferably having 6 to 20 carbon atoms, for example, phenyl), a fluoroalkyl group, an aralkyl group, a hydrocarbon group obtained by combining these groups, or a substituent such as a fluorine atom. A. Each B independently represents 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. Each of the R's in structure Z3、R4A, B, they may be the same or different from each other. The bond between consecutive C (carbon atoms) is usually a single bond, but may include a double bond or a triple bond, and the bond between C may include a linking group such as an ether group, an amide group, an ester group, a carbonyl group, or a carbonate group. One C is bonded to the other C in an amount of 1 to 4, and a long hydrocarbon chain may be branchedOr in the case of a radial structure.
y represents a hydrophilic group having hydrophilicity and containing an atom selected from the group consisting of a hydrogen atom, a carbon atom, an oxygen atom, a nitrogen atom, a phosphorus atom, and a sulfur atom. For example, hydroxyl, carboxylic acid, amino, amide, imino, phenolic groups; or a POA group (the number of carbon atoms of the oxyalkylene group is preferably 1 to 4. for example, a POE group, a POP group, a POB group, or a POA group obtained by combining these groups); or a hydrophilic group having a plurality of hydroxyl groups such as an erythritol group, a xylitol group, a sorbitol group, a glycerin group, or an ethylene glycol group; or a hydrophilic group such as a sulfonic acid group, a sulfuric acid group, a phosphoric acid group, a sulfobetaine group, a carbonylbetaine group, a phosphobetaine group, a quaternary ammonium group, an imidazolium betaine group, an epoxy group, a carbinol group, or a methacryl group; or a hydrophilic group containing a combination thereof, and the like. When a plurality of Y are used, they may be the same or different from each other.
In the structures Z-Y and Y-Z-Y, Y is bonded to Z or to the end group of Z. In the case where Y is bonded to Z, the terminal group of Z is bonded to Y by removing the same number of hydrogen atoms or the like as the number of bonds to Y.
In this structure, the hydrophilic group Y, A, B is selected from the specifically described groups so as to satisfy the spreading factor, water solubility, and interfacial tension. Thus, the intended liquid film cracking effect is exhibited.
In the second embodiment, examples of the structure Z, Z-Y, Y-Z-Y and examples of the liquid film cracking agent having the structure include those described in paragraphs [0051] to [0085] of International publication No. 2016/098796.
The spreading factor, surface tension, water solubility and interfacial tension of the second embodiment can be set to predetermined ranges by introducing a small amount of hydrophilic POE group to such an extent that water insolubility can be maintained, introducing POP group or POB group which is hydrophobic but can lower interfacial tension, changing the chain length of the hydrocarbon chain, using a substance having a branched chain in the hydrocarbon chain, using a substance having a double bond in the hydrocarbon chain, using a substance having a benzene ring or naphthalene ring in the hydrocarbon chain, and the like, respectively, for the hydrocarbon compound having 5 or more carbon atoms.
The nonwoven fabric of the present invention may contain other components as needed, in addition to the liquid film-splitting agent. The liquid film cracking agent of the first embodiment and the liquid film cracking agent of the second embodiment may be used in combination in addition to the forms of the two agents. This is also true for the first compound (i.e., the polyether compound and the nonionic surfactant described in international publication No. 2016/098796 [0054 ]) and the second compound (i.e., the hydrocarbon compound having 5 or more carbon atoms described in international publication No. 2016/098796 [0060 ]) in the liquid film cracking agent of the second embodiment. In this case, as the liquid film-splitting agent, 1 or more compounds selected from the above-mentioned compound (C1) and compound (C2) may be used.
In the nonwoven fabric of the present invention, the surface tension (γ) of the liquid film (liquid having a surface tension of 50 mN/m) can be used for identifying the liquid film-splitting agent and the phosphate ester type anionic surfactant contained thereinw) The method of identification described in the measurement methods of the above.
when the component of the liquid film cracking 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) with respect to the mass of the nonwoven fabric can be determined by dividing the content of the liquid film cracking agent by the mass of the fibers based on the mass of the substance obtained by the above-described analysis method.
The nonwoven fabric according to the present embodiment has a high effect of reducing liquid retention and is excellent in dryness, and therefore has excellent liquid permeability regardless of the thickness of the fibers and the distance between the fibers. Thus, as described in paragraphs [0089] to [0092] of International publication No. 2016/098796, the distance between fibers required for the liquid permeability of the nonwoven fabric can be reduced to a value smaller than that of the conventional nonwoven fabric. This makes it possible to use thinner fibers than conventional ones to produce a nonwoven fabric having a softer texture.
The nonwoven fabric of the present embodiment may be in various forms. For example, the fiber layer may include 1 fiber layer, or may include a plurality of fiber layers of 2 or more. The shape may be flat or may have irregularities. Examples of the nonwoven fabric having an uneven shape include nonwoven fabrics described in paragraphs [0100] to [0110] of international publication No. 2016/098796 and fig. 3 to 11.
The nonwoven fabric of the present invention can be used in various fields by utilizing its performance of reducing liquid residue and preventing liquid from flowing on the surface, and the high dryness and smoothness brought by them. The sheet is suitably used as, for example, a topsheet, a second sheet (a sheet disposed between the topsheet and the absorbent body), an absorbent body, a cover sheet including an absorbent body, a leakage-preventing sheet, a human cleansing sheet, a skin care sheet, and a wipe for articles in absorbent articles for absorbing liquid discharged from the body, such as sanitary napkins, panty liners, disposable diapers, and incontinence pads.
Typically, an absorbent article for absorbing liquid discharged from the body includes a topsheet, a backsheet, and a liquid-retentive absorbent body disposed between the two sheets. As the absorbent body and the back sheet in the case where the nonwoven fabric of the present invention is used as a top sheet, materials generally used in the art can be used without particular limitation. For example, as the absorbent body, an absorbent body in which a fiber aggregate made of a fiber material such as pulp fiber or a substance having an absorbent polymer retained therein is covered with a cover sheet such as tissue paper or nonwoven fabric can be used. As the back sheet, a liquid impermeable or water repellent sheet such as a film of a thermoplastic resin 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 components in accordance with the specific use of the absorbent article. Such components are well known to those skilled in the art. For example, when the absorbent article is applied to a disposable diaper or a sanitary napkin, one or two or more pairs of three-dimensional cuffs may be disposed on the left and right side portions of the topsheet.
The present invention also discloses the following nonwoven fabric, absorbent article, and fiber treatment agent.
<1>
A nonwoven fabric containing a liquid film-splitting agent, wherein the reduction rate of surface tension is less than 25% in the following [ method for measuring the reduction rate of surface tension of body fluid ].
[ method of measuring the rate of decrease in surface tension of body fluid ]
(1) The following test solutions were prepared. The surface tension was measured by the plate method in an environmental region at a temperature of 25 ℃ and a Relative Humidity (RH) of 65%.
Test solution: 100mL of the equine defibrinated blood was allowed to stand at 22 ℃ and a humidity of 65% for 1 hour, and the liquids separated into the upper layer and the lower layer were mixed to adjust the mixing ratio so that the viscosity became 8.0 cP.
(2) Next, a nonwoven fabric coated with a component other than the liquid film breaking agent among the components disposed on the surface of the nonwoven fabric fiber is prepared. The amount of the component to be applied is determined by identifying the structure, amount, and ratio of the component extracted from the nonwoven fabric. The coated nonwoven fabric to be measured was directly stuck to a petri dish having a diameter of 5cm × 5cm, and the test solution was repeatedly passed 3g at a time, and a total of 15g was passed.
(3) The surface tension of the liquid having passed through was measured by the plate method used in the above (1).
(4) The reduction ratio (%) of the surface tension of the body fluid after passing through the nonwoven fabric of (3) to the surface tension of the test fluid before passing through the nonwoven fabric of (1) was calculated.
<2>
A nonwoven fabric comprising 1 or more compounds selected from the group consisting of the following compound (C1) and the following compound (C2), wherein the reduction rate of surface tension in the following [ method for measuring the reduction rate of surface tension of body fluid ] is less than 25%.
(C1) A compound having a spreading factor of 15mN/m or more relative to a liquid having a surface tension of 50mN/m and a water solubility of 0g to 0.025g,
(C2) A spreading factor of more than 0mN/m with respect to a liquid having a surface tension of 50mN/m, a water solubility of 0g to 0.025g, and an interfacial tension of 20mN/m or less with respect to a liquid having a surface tension of 50mN/m
[ method of measuring the rate of decrease in surface tension of body fluid ]
(1) The following test solutions were prepared. The surface tension was measured by the plate method in an environmental region at a temperature of 25 ℃ and a Relative Humidity (RH) of 65%.
Test solution: 100mL of the equine defibrinated blood was allowed to stand at 22 ℃ and a humidity of 65% for 1 hour, and the liquids separated into the upper layer and the lower layer were mixed to adjust the mixing ratio so that the viscosity became 8.0 cP.
(2) Next, a nonwoven fabric coated with components other than the compound (C1) and the compound (C2) among the components disposed on the surface of the nonwoven fabric fiber was prepared. The amount of the component to be applied is determined by identifying the structure, amount, and ratio of the component extracted from the nonwoven fabric. The coated nonwoven fabric to be measured was directly stuck to a petri dish having a diameter of 5cm × 5cm, and the test solution was repeatedly passed 3g at a time, and a total of 15g was passed.
(3) The surface tension of the liquid having passed through was measured by the plate method used in the above (1).
(4) The reduction ratio (%) of the surface tension of the body fluid after passing through the nonwoven fabric of (3) to the surface tension of the test fluid before passing through the nonwoven fabric of (1) was calculated.
<3>
the nonwoven fabric according to the above <1> or <2>, wherein the reduction rate of the surface tension is 23% or less, preferably 17% or less, more preferably 12% or less, and still more preferably 0%.
<4>
The nonwoven fabric according to any one of <1> to <3> above, further comprising 1 or more components selected from the following components (D1), (D2) and (D3).
(D1) Nonionic surfactant
(D2) Compound having surface tension of 42mN/m or more
(D3) A compound having a melting point of 40 ℃ or higher, being more hydrophilic than the liquid film cracking agent, and having no hydrophilic group
<5>
A nonwoven fabric comprising a liquid film-splitting agent and 1 or more components selected from the following components (D1), (D2) and (D3).
(D1) Nonionic surfactant
(D2) Compound having surface tension of 42mN/m or more
(D3) A compound having a melting point of 40 ℃ or higher, being more hydrophilic than the liquid film cracking agent, and having no hydrophilic group
<6>
A nonwoven fabric comprising 1 or more compounds selected from the group consisting of the following compound (C1) and the following compound (C2), and 1 or more components selected from the group consisting of the following components (D1), (D2) and (D3).
(C1) A compound having a spreading coefficient of 15mN/m or more with respect to a liquid having a surface tension of 50mN/m and a water solubility of 0g to 0.025g
(C2) A spreading factor of more than 0mN/m with respect to a liquid having a surface tension of 50mN/m, a water solubility of 0g to 0.025g, and an interfacial tension of 20mN/m or less with respect to a liquid having a surface tension of 50mN/m
(D1) nonionic surfactant
(D2) Compound having surface tension of 42mN/m or more
(D3) A compound having a melting point of 40 ℃ or higher, being more hydrophilic than the above-mentioned compound (C1), and having no hydrophilic group
<7>
The nonwoven fabric according to any one of <1> to <6> above, further comprising a phosphate ester type anionic surfactant.
<8>
The nonwoven fabric according to any one of the above <4> to <7>, wherein a mass ratio of the total amount of the components (D1), (D2) and (D3) to the total amount of the liquid film breaking agent or the total amount of the compound (C1) and the compound (C2) (total mass of the components (D1), (D2) and (D3)/total mass of the compound (1) and the compound (2)) is 0.25 to 9, preferably 0.43, more preferably 0.53, and further preferably 4 or less, more preferably 2.3 or less.
<9>
The nonwoven fabric according to any one of the above <4> to <7>, wherein a mass ratio of the total amount of the components (D1), (D2) and (D3) to the total amount of the liquid film breaking agent or the total amount of the compound (C1) and the compound (C2) (total mass of the components (D1), (D2) and (D3)/total mass of the liquid film breaking agent or the compound (1) and the compound (2)) is 0.53 or more and 2.3 or less.
<10>
The nonwoven fabric according to any one of the above <4> to <9>, wherein the total amount of the components (D1), (D2) and (D3) is 0.06% by mass or more and 3% by mass or less, preferably 0.1% by mass or more, more preferably 0.14% by mass or more, and further preferably 2.3% by mass or less, more preferably 1% by mass or less in terms of the content (OPU) relative to the mass of the nonwoven fabric.
<11>
The nonwoven fabric according to any one of the above <4> to <9>, wherein the total amount of the components (D1), (D2) and (D3) is 0.06 mass% or more and 1 mass% or less in terms of a content ratio (OPU) with respect to the mass of the nonwoven fabric.
<12>
The nonwoven fabric according to any one of <4> to <11>, wherein the component (D1) has solubility in water alone.
<13>
The nonwoven fabric according to any one of <4> to <12>, wherein the solubility of the component (D1) in water alone means that: when a 2.5 wt% aqueous solution of the component (D1) was prepared by immersing the component alone in water for 20 minutes, the height of foam was 10mm or more, preferably 20mm or less, more preferably 18mm or less, and still more preferably 15mm or less as determined by the following measurement.
(method of measuring foaming height of aqueous solution of component (D1) after shaking)
First, 0.2g of component (D1) was weighed and poured into a screw (No. 4 manufactured by Maruemu, pipe diameter 24mm, full length 53mm), and 8.0g of deionized water was further poured, and then left to stand for 20 minutes to be sufficiently dissolved in the deionized water to prepare an aqueous solution.
Subsequently, the coil was strongly oscillated in the vertical direction for 2 cycles, and then rapidly placed on a horizontal surface. The height of the structure layer of the aqueous solution (height from the liquid surface of the liquid layer to the upper surface of the structure layer containing air) was measured after 10 seconds had elapsed from immediately after the oscillation. This height was defined as the height of bubbling of the aqueous solution of the component (D1) after shaking.
<14>
The nonwoven fabric according to any one of <4> to <12> above, wherein the component (D1) having solubility in water alone is: when a 2.5 wt% aqueous solution of the component (D1) was prepared by immersing the mixture alone in water for 20 minutes, the height of foam was 10mm to 15mm as determined by the following measurement.
(method of measuring foaming height of aqueous solution of component (D1) after shaking)
First, 0.2g of component (D1) was weighed and poured into a screw (No. 4 manufactured by Maruemu, pipe diameter 24mm, full length 53mm), and 8.0g of deionized water was further poured, and then left to stand for 20 minutes to be sufficiently dissolved in the deionized water to prepare an aqueous solution.
Subsequently, the coil was strongly oscillated in the vertical direction for 2 cycles, and then rapidly placed on a horizontal surface. The height of the structure layer of the aqueous solution (height from the liquid surface of the liquid layer to the upper surface of the structure layer containing air) was measured after 10 seconds had elapsed from immediately after the oscillation. This height was defined as the height of bubbling after shaking of the aqueous solution of the component (D1).
<15>
The nonwoven fabric according to any one of the above <4> to <14>, wherein the component (D1) comprises a compound having a higher HLB value than the liquid film opener or 1 or more compounds selected from the compound (C1) and the compound (C2).
<16>
The nonwoven fabric according to any one of the above <4> to <15>, wherein the component (D1) contains a compound having an HLB value of 10 or more and 20 or less, preferably 11 or more, more preferably 13 or more, and preferably 17 or less, more preferably 15 or less.
<17>
The nonwoven fabric according to any one of the above <4> to <15>, wherein the component (D1) contains a compound having an HLB value of 13 or more and 15 or less.
<18>
The nonwoven fabric according to any one of the above <4> to <17>, wherein the component (D1) contains a compound having a melting point of 5 ℃ or more and less than 25 ℃, preferably 10 ℃ or more, more preferably 15 ℃ or more, and preferably 24 ℃ or less, more preferably 22 ℃ or less.
<19>
The nonwoven fabric according to any one of the above <4> to <17>, wherein the component (D1) contains a compound having a melting point of 15 ℃ or more and 22 ℃ or less.
<20>
The nonwoven fabric according to any one of the above <4> to <19>, wherein the component (D1) contains at least 1 selected from the group consisting of a hydrocarbon-based nonionic surfactant and a silicone-based nonionic surfactant.
<21>
The nonwoven fabric according to any one of the above <4> to <20>, wherein the nonionic surfactant of the component (D1) has at least 1 kind selected from the polyethylene oxide type, the polyol (polyol) type, the block polymer type, and the nitrogen-containing type as a hydrophilic group, and has an alkyl chain or a silicone chain other than a polyol fatty acid skeleton as a hydrophobic group.
<22>
The nonwoven fabric according to any one of the above <4> to <21>, wherein the component (D1) has at least a polyoxyethylene group as a hydrophilic group.
<23>
The nonwoven fabric according to any one of the above <4> to <22>, wherein the nonionic surfactant of the component (D1) contains at least 1 selected from the following (D11) and (D12).
(D11) The foaming height of the aqueous solution after shaking is 10mm or more, a hydrophilic group is a group consisting of only polyoxyethylene or a group containing polyoxyethylene and other polyoxyalkylene, and a hydrophobic group is a hydrocarbon-based nonionic surfactant using a linear hydrocarbon chain or a branched hydrocarbon chain (excluding a polyol fatty acid skeleton).
(D12) A silicone nonionic surfactant having a foaming height after shaking of an aqueous solution of 10mm or more, having a group consisting of only a polyoxyethylene group or a group containing a polyoxyethylene group and another polyoxyalkylene group as a hydrophilic group, and having a linear silicone chain or a branched silicone chain as a hydrophobic group.
<24>
The nonwoven fabric according to any one of the above <4> to <23>, wherein the nonionic surfactant of the component (D1) contains at least 1 selected from the following (D11-1), (D11-2), (D12-1) and (D12-2).
(D11-1) a hydrocarbon-based nonionic surfactant having a polyoxyethylene group with an oxyethylene addition mole number of 5 moles or more as a hydrophilic group and a linear hydrocarbon chain with a carbon number of about 10 to 22 as a hydrophobic group, which is a linear polyoxyethylene alkyl ether;
(D11-2) a hydrocarbon-based nonionic surfactant having a copolymer of a polyoxypropylene group and a polyoxyethylene group, as a hydrophilic group, wherein the number of moles of oxyethylene added to the polyoxyethylene group is 5 or more moles and the number of moles of oxypropylene added to the polyoxypropylene group is 3 or less moles, and having a linear hydrocarbon chain as a hydrophobic group;
(D12-1) a silicone nonionic surfactant having a polyoxyethylene group in a linear silicone chain, the silicone nonionic surfactant being a side chain-modified silicone;
(D12-2) A silicone nonionic surfactant having a linear silicone chain side chain modified with a copolymer in which the number of moles of oxyethylene added to a polyoxyethylene group and the number of moles of oxypropylene added to a polyoxypropylene group are 30 moles or more in total and the number of moles of oxyethylene added to a polyoxyethylene group is greater than the number of moles of oxypropylene added to a polyoxypropylene group, as a hydrophilic group.
<25>
The nonwoven fabric according to any one of the above <4> to <24>, wherein the component (D1) contains a hydrocarbon-based nonionic surfactant having a melting point of 20 ℃ or higher, having a polyoxyethylene group as a hydrophilic group in which the number of moles of oxyethylene added is 9, and having a lauryl group as a hydrophobic group.
<26>
The nonwoven fabric according to any one of the above <4> to <25>, wherein the nonionic surfactant of the component (D1) contains at least 1 selected from the following groups.
(Hydrocarbon-based nonionic surfactant)
Polyethylene oxide type nonionic surfactant: polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester
Polyol (polyhydric alcohol) type nonionic surfactant: sorbitan monoalkylates, polyoxyethylene sorbitan monoalkylates, glycerol monoalkylates, polyglyceryl monoalkylates, alkyl glucosides, pentaerythritol monoalkylates
Block polymer type nonionic surfactant: alkyl ether of polyoxyethylene polyoxypropylene glycol, polyoxyethylene polyoxypropylene alkyl ether
Nitrogen-containing nonionic surfactant: polyoxyethylene alkylamines, alkyl polyoxyethylene fatty acid amides
(Silicone-based nonionic surfactant)
A silicone nonionic surfactant which contains 1 or more polyoxyethylene groups and has a maximum number of moles of oxyethylene groups in the polyoxyethylene groups, wherein the number of moles of oxyalkylene groups in the polyoxyalkylene groups added is 30 moles or more, and which is a polyoxyethylene polyoxypropylene-modified silicone.
<27>
The nonwoven fabric according to any one of the above <4> to <26>, wherein the nonionic surfactant of the component (D1) has a mass-average molecular weight of 50 or more and 1500 or less, preferably 100 or more, more preferably 200 or more, and preferably 1000 or less, more preferably 750 or less.
<28>
The nonwoven fabric according to any one of the above <4> to <27>, wherein the component (D2) contains a compound having a surface tension higher than that of the liquid film cleavage agent or 1 or more compounds selected from the compound (C1) and the compound (C2).
<29>
The nonwoven fabric according to any one of the above <4> to <28>, wherein the component (D2) contains a compound having a surface tension of 42mN/m or more and 60mN/m or less, preferably 42.5mN/m or more, more preferably 43mN/m or more, and preferably 55mN/m or less, more preferably 50mN/m or less.
<30>
The nonwoven fabric according to any one of the above <4> to <28>, wherein the component (D2) contains a compound having a surface tension of 43mN/m or more and 50mN/m or less.
<31>
The nonwoven fabric according to any one of the above <4> to <30>, wherein the component (D2) contains a compound having a structure only having a hydrophilic group.
<32>
The nonwoven fabric according to the above <31>, wherein the component (D2) comprises a compound having the following structure as a structure having the hydrophilic group:
has a polyoxyethylene structure or a block copolymer of a polyoxyethylene group and a polyoxypropylene group.
<33>
The nonwoven fabric according to any one of the above <4> to <32>, wherein the component (D2) contains 1 or more selected from polyethylene glycol and a copolymer of polypropylene glycol and polyethylene glycol.
<34>
the nonwoven fabric according to any one of the above <4> to <33>, wherein the compound contained in the component (D2) has a mass-average molecular weight of 200 to 10000, which is 300 to 400, preferably 8000, and more preferably 6000.
<35>
the nonwoven fabric according to any one of the above <4> to <33>, wherein the compound contained in the component (D2) has a mass-average molecular weight of 400 to 6000.
<36>
The nonwoven fabric according to any one of the above <4> to <35>, wherein when the component (D2) includes a copolymer of a polyoxyethylene compound and a polyoxypropylene compound, the polymerization ratio of the polyoxypropylene compound (POP) to the polyoxyethylene compound (POE) (polymerization degree of POP/polymerization degree of POE) is more than 0 and 10 or less, preferably 5 or more, more preferably 6.5 or more, and further preferably 8 or less, more preferably 7 or less.
<37>
The nonwoven fabric according to any one of the above <4> to <35>, wherein when the component (D2) contains a copolymer of a polyoxyethylene compound and a polyoxypropylene compound, the polymerization ratio (degree of polymerization of POP/degree of polymerization of POE) of the polyoxypropylene compound (POP) to the polyoxyethylene compound (POE) is 6.5 or more and 7 or less.
<38>
The nonwoven fabric according to any one of the above <4> to <37>, wherein the component (D2) contains 1 or more selected from polyethylene glycol having a mass average molecular weight of 400 and a compound obtained by polymerizing polyethylene glycol and polypropylene glycol at a mass ratio of about 1: 7.
<39>
The nonwoven fabric according to any one of the above <4> to <38>, wherein the component (D3) contains a compound having a melting point of 40 ℃ or more and 120 ℃ or less, preferably 50 ℃ or more, more preferably 60 ℃ or more, and preferably 110 ℃ or less, more preferably 100 ℃ or less.
<40>
The nonwoven fabric according to any one of the above <4> to <38>, wherein the component (D3) contains a compound having a melting point of 60 ℃ or more and 100 ℃ or less.
<41>
The nonwoven fabric according to any one of <4> to <40>, wherein the component (D3) contains a compound having a water solubility of 0.01g or less, preferably 0.001g or less, and more preferably less than 0.0001 g.
<42>
the nonwoven fabric according to any one of the above <4> to <41>, wherein the compound contained in the component (D3) has a mass-average molecular weight of 200 or more and 5000 or less, preferably 300 or more, more preferably 400 or more, and preferably 4000 or less, more preferably 3000 or less.
<43>
The nonwoven fabric according to any one of the above <4> to <41>, wherein the compound contained in the component (D3) has a mass-average molecular weight of 400 to 3000 inclusive.
<44>
The nonwoven fabric according to any one of <4> to <43>, wherein the component (D3) contains a hydrocarbon compound.
<45>
The nonwoven fabric according to any one of <4> to <44>, wherein the component (D3) contains a diamide compound.
<46>
The nonwoven fabric according to any one of the above <4> to <45>, wherein the component (D3) contains N' N-bis (3-methoxypropyl) behenic acid diamide.
<47>
The nonwoven fabric according to any one of <4> to <46>, wherein the component (D3) contains a compound more hydrophilic than the liquid film breaking agent or the compound (C1), "more hydrophilic than the liquid film breaking agent or the compound (C1)" means that the IOB value of the component (D3) is larger than the IOB value of the liquid film breaking agent or the compound (C1).
<48>
The nonwoven fabric according to <47>, wherein the component (D3) contains a compound having an IOB value of 0.7 or more and 0.9 or less, preferably 0.75 or more, and more preferably 0.85 or less.
<49>
The nonwoven fabric according to <47>, wherein the component (D3) contains a compound having an IOB value of 0.75 or more and 0.85 or less.
<50>
The nonwoven fabric according to any one of <4> to <49>, wherein the liquid film breaking agent or the compound (C1) contains a compound having an IOB value of 0.3 or more and 0.8 or less, preferably 0.45 or more, more preferably 0.55 or more, and preferably 0.7 or less, more preferably 0.65 or less.
<51>
The nonwoven fabric according to any one of <4> to <49>, wherein the liquid film cleavage agent or the compound (C1) contains a compound having an IOB value of 0.55 or more and 0.65 or less.
<52>
The nonwoven fabric according to any one of <4> to <51>, wherein the liquid film breaking agent or the compound (C2) contains a compound having an IOB value of 0 or more and 0.6 or less, preferably 0.05 or more, more preferably 0.1 or more, further preferably 0.5 or less, more preferably 0.4 or less.
<53>
The nonwoven fabric according to any one of <4> to <51>, wherein the liquid film cleavage agent or the compound (C2) contains a compound having an IOB value of 0.1 or more and 0.4 or less.
<54>
The nonwoven fabric according to any one of the above <4> to <53>, wherein a mixed layer of the liquid film cracking agent or 1 or more compounds selected from the group consisting of the compound (C1) and the compound (C2) and 1 or more components selected from the group consisting of the components (D1), (D2) and (D3) is provided on an outermost surface layer of fibers constituting the nonwoven fabric.
<55>
an absorbent article comprising the nonwoven fabric according to any one of <1> to <54 >.
<56>
An absorbent article having a topsheet and an absorbent body, the absorbent article comprising the nonwoven fabric of any one of the above <1> to <54> as the topsheet.
<57>
a fiber-treating agent comprising a liquid film-splitting agent and 1 or more components selected from the following components (D1), (D2) and (D3).
(D1) Nonionic surfactant
(D2) compound having surface tension of 42mN/m or more
(D3) A compound having a melting point of 40 ℃ or higher, being more hydrophilic than the liquid film cracking agent, and having no hydrophilic group
<58>
A fiber-treating agent comprising 1 or more compounds selected from the following compounds (C1) and (C2), and 1 or more components selected from the following components (D1), (D2) and (D3).
(C1) A compound having a spreading coefficient of 15mN/m or more with respect to a liquid having a surface tension of 50mN/m and a water solubility of 0g to 0.025g
(C2) A spreading factor of more than 0mN/m with respect to a liquid having a surface tension of 50mN/m, a water solubility of 0g to 0.025g, and an interfacial tension of 20mN/m or less with respect to a liquid having a surface tension of 50mN/m
(D1) Nonionic surfactant
(D2) compound having surface tension of 42mN/m or more
(D3) A compound having a melting point of 40 ℃ or higher, being more hydrophilic than the above-mentioned compound (C1), and having no hydrophilic group
<59>
Use of a nonwoven fabric containing 1 or more compounds selected from the group consisting of the following compound (C1) and the following compound (C2) for liquid film splitting, wherein the reduction rate of surface tension in the method for measuring the reduction rate of body fluid surface tension is less than 25%.
(C1) A compound having a spreading coefficient of 15mN/m or more with respect to a liquid having a surface tension of 50mN/m and a water solubility of 0g to 0.025g
(C2) A spreading factor of more than 0mN/m with respect to a liquid having a surface tension of 50mN/m, a water solubility of 0g to 0.025g, and an interfacial tension of 20mN/m or less with respect to a liquid having a surface tension of 50mN/m
[ method of measuring the rate of decrease in surface tension of body fluid ]
(1) The following test solutions were prepared. The surface tension was measured by the plate method in an environmental region at a temperature of 25 ℃ and a Relative Humidity (RH) of 65%.
Test solution: 100mL of the equine defibrinated blood was allowed to stand at 22 ℃ and a humidity of 65% for 1 hour, and the liquids separated into the upper layer and the lower layer were mixed to adjust the mixing ratio so that the viscosity became 8.0 cP.
(2) Next, a nonwoven fabric coated with components other than the compound (C1) and the compound (C2) among the components disposed on the surface of the nonwoven fabric fiber was prepared. The amount of the component to be applied is determined by identifying the structure, amount, and ratio of the component extracted from the nonwoven fabric. The coated nonwoven fabric to be measured was directly stuck to a petri dish having a diameter of 5cm × 5cm, and the test solution was repeatedly passed 3g at a time, and a total of 15g was passed.
(3) The surface tension of the liquid having passed through was measured by the plate method used in the above (1).
(4) The reduction ratio (%) of the surface tension of the body fluid after passing through the nonwoven fabric of (3) to the surface tension of the test fluid before passing through the nonwoven fabric of (1) was calculated.
<60>
Use of a nonwoven fabric containing 1 or more compounds selected from the group consisting of the following compound (C1) and the following compound (C2), and 1 or more components selected from the group consisting of the following components (D1), (D2), and (D3) for liquid film splitting.
(C1) A compound having a spreading coefficient of 15mN/m or more with respect to a liquid having a surface tension of 50mN/m and a water solubility of 0g to 0.025g
(C2) A spreading factor of more than 0mN/m with respect to a liquid having a surface tension of 50mN/m, a water solubility of 0g to 0.025g, and an interfacial tension of 20mN/m or less with respect to a liquid having a surface tension of 50mN/m
(D1) Nonionic surfactant
(D2) Compound having surface tension of 42mN/m or more
(D3) A compound having a melting point of 40 ℃ or higher, being more hydrophilic than the above-mentioned compound (C1), and having no hydrophilic group
Examples
The present invention will be described in more detail below with reference to examples, but the present invention is not to be construed as being limited thereto. In the present example, "part(s)" and "%" are based on mass unless otherwise specified. In addition, the spreading factor, interfacial tension, surface tension and water solubility were measured in an environmental region at a temperature of 25 ℃ and a Relative Humidity (RH) of 65% as described above. The surface tension, water solubility and interfacial tension of the liquid film cracking agent in the following examples and the like were measured by the measurement methods described in paragraphs [0015] to [0022] of the above-mentioned International publications No. 2016/098796. The melting point of the component (D1), the height of foam formed after shaking of the aqueous solution of the component (D1), and HLB in the following examples and the like were measured based on the above (method for measuring the melting point of the component (D1)), (method for measuring the height of foam formed after shaking of the aqueous solution of the component (D1)), and (method for measuring the HLB value of the component (D1)). The surface tension of the component (D2) in the following examples and the like was measured based on the above (method for measuring the surface tension of the component (D2)). The water solubility of the component (D3) was measured by the same method as that for the liquid film-breaking agent. In the following table, "-" means that the formulation indicated by the item name is not used, and that no value is assigned to the item.
(example 1)
(1) production of raw material non-woven fabric
As the upper layer web, a non-heat shrinkable fiber having a fineness of 1.2dtex and a basis weight of 22g/m was used2The upper layer web and the heat-shrinkable fiber having a fineness of 2.3dtex, and having a basis weight of 25g/m2The lower layer web of (a). Next, the upper web and the lower web were laminated, and subjected to embossing treatment from the upper web side with the same embossing pattern as in example 1 described in japanese patent application laid-open No. 2015-186543. As a result, the nonwoven fabric 1 shown in fig. 2 in which the concave joining portions 19 for joining the muscle-side fiber layer 17 and the non-muscle-side fiber layer 18 are formed is obtained. From this nonwoven fabric, a raw material nonwoven fabric of example 1 having a size of 400mm × 140mm was produced.
(2) Preparation of coating liquid
the following liquid film cracking agent and the following component (D1) were mixed at room temperature of 25 ℃ in a mass ratio of 75:25 to prepare a coating liquid.
< liquid film cleavage agent >
POE-modified dimethyl silicone (KF-6015, trade name, manufactured by shin-Etsu chemical Co., Ltd.) wherein X in the structure X-Y comprises a compound containing-Si (CH)3)2Dimethyl-silicone chain of O-, Y comprising a group containing- (C)2H4POE chain of O) -, the end group of the POE chain being methyl (CH)3) A compound having a modification rate of 20%, a molar number of addition of oxyethylene of 3 and a mass average molecular weight of 4000.
The liquid film cracking agent has a surface tension of 21.0mN/m and a water solubility of less than 0.0001 g. The spreading factor of the liquid film opener with respect to a liquid having a surface tension of 50mN/m was 28.8mN/m, and the interfacial tension of the liquid film opener with respect to a liquid having a surface tension of 50mN/m was 0.2 mN/m. These values were measured by the above-mentioned measurement methods. At this time, the following solution was used as the "liquid having a surface tension of 50 mN/m": a solution prepared by adding 3.75. mu.L of POE sorbitan monolaurate (product name: RHEODOL SUPER TW-L120, product name: King, product name: Socorex Isba SA) as a nonionic surface active material to 100g of deionized water with a micropipette (product name: ACURA825, product name: Socorex Isba SA) and adjusting the surface tension to 50. + -. 1 mN/m. In addition, the water solubility was measured by adding 0.0001g of the preparation each time. As a result, it was found that 0.0001g was not dissolved and 0.0001g was "less than 0.0001 g", and that 0.0001g was dissolved and 0.0002g was not dissolved and was "0.0001 g". Other values were also measured by the same method.
< ingredient (D1) >
POE straight lauryl ether (product name EMULGEN 109P, product of King of flowers)
(3) production of nonwoven Fabric samples
The nonwoven fabric sample of example 1 was prepared by applying the coating liquid from the entire upper layer side of the raw material nonwoven fabric by the flexographic printing method. The content ratio (OPU) of the liquid film-breaking agent and the component (D1) is shown in Table 4.
(example 2)
A nonwoven fabric sample of example 2 was produced in the same manner as in example 1, except that the mixing ratio of the liquid film breaking agent to the component (D1) in the coating liquid was 3:2(60:40) by mass ratio and the content ratio (OPU) of the liquid film breaking agent to the component (D1) was as shown in table 4.
(example 3)
A nonwoven fabric sample of example 3 was produced in the same manner as in example 1, except that the following components were used as the component (D1).
< ingredient (D1) >
POE-POP straight chain alkyl (C)11～C14) Ether (product name EMULGEN LS-106, manufactured by Huawang Co., Ltd.)
(example 4)
A nonwoven fabric sample of example 4 was produced in the same manner as in example 1, except that the following components were used as the component (D1).
< ingredient (D1) >
POE-POP straight chain alkyl (C)11～C14) Ether (product name EMULGEN LS-110, manufactured by Huawang Co., Ltd.)
(example 5)
A nonwoven fabric sample of example 5 was produced in the same manner as in example 1, except that the following components were used as the component (D1).
< ingredient (D1) >
POE-POP straight chain alkyl (C)11～C14) Ether (product name EMULGEN LS-114 manufactured by Huawang Co., Ltd.)
(example 6)
A nonwoven fabric sample of example 6 was produced in the same manner as in example 1, except that the following components were used as the component (D1).
< ingredient (D1) >
POE-POP modified Silicone (trade name KF6012, product of shin-Etsu chemical Co., Ltd.)
(example 7)
A nonwoven fabric sample of example 7 was produced in the same manner as in example 1, except that the following components were used as the component (D1).
< ingredient (D1) >
POE Linear lauryl ether (product name EMULGEN 106, manufactured by Huawang Co., Ltd.)
(example 8)
A nonwoven fabric sample of example 8 was produced in the same manner as in example 1, except that the following components were used as the component (D1).
< ingredient (D1) >
POE alkyl sec-C11-C15Ether (product name EMULGEN 705, manufactured by Huawang Co., Ltd.)
(example 9)
A nonwoven fabric sample of example 9 was produced in the same manner as in example 1, except that the following components were used as the component (D1).
< ingredient (D1) >
POE alkyl sec-C11-C15Ether (product name EMULGEN 707, manufactured by Huawang Co., Ltd.)
(example 10)
A nonwoven fabric sample of example 10 was produced in the same manner as in example 1, except that the following components were used as the component (D1).
< ingredient (D1) >
POE alkyl sec-C11-C15Ether (product name EMULGEN 709 manufactured by Huawang corporation)
(example 11)
A nonwoven fabric sample of example 11 was produced in the same manner as in example 1, except that the following components were used as the component (D1).
< ingredient (D1) >
POE oleyl ether (product name EMULGEN 408, product of King of flowers)
(example 12)
The nonwoven fabric sample of example 12 was produced in the same manner as in example 2, except that the following liquid film splitting agent was used and the content ratio (OPU) of the liquid film splitting agent and the component (D1) was as shown in table 4.
< liquid film cleavage agent >
Epoxy-modified dimethyl silicone (KF-101, trade name, manufactured by shin-Etsu chemical industries, Ltd.), wherein X in the structure X-Y contains-Si (CH)3)2Dimethylsilone chain of O-, Y comprising a compound containing- (RC)2H3O) -has a modification rate of 32% and a mass average molecular weight of 35800.
Surface tension: 21.0mN/m
Water solubility: less than 0.0001g
Spreading coefficient with respect to a liquid having a surface tension of 50 mN/m: 26.0mN/m
Interfacial tension with respect to a liquid having a surface tension of 50 mN/m: 3.0mN/m
(example 13)
A nonwoven fabric sample of example 12 was produced in the same manner as in example 2, except that the following liquid film-splitting agent was used.
< liquid film cleavage agent >
Caprylic/capric triglyceride (product name COCONAD MT manufactured by Kao corporation), Z in structure Z-Y is-O-CH (CH)2O-*)2(represents a bonding part), Y contains C8H15O-、C10H19A hydrocarbon chain of O-, a fatty acid composition comprising 82% of octanoic acid and 18% of decanoic acid, and a mass average molecular weightIs 550.
Surface tension: 28.9mN/m
Water solubility: less than 0.0001g
Spreading coefficient with respect to a liquid having a surface tension of 50 mN/m: 8.8mN/m
Interfacial tension with respect to a liquid having a surface tension of 50 mN/m: 12.3mN/m
(example 14)
the coating solution of example 2 was mixed with stearyl group (C)18) Potassium phosphate salt (neutralized potassium hydroxide product of Gripper 4131, product of Kao corporation) was mixed, and a 25 mass% diluted solution was prepared from ethanol. The diluted solution was applied to the same raw material nonwoven fabric as the nonwoven fabric produced in example 1 by a flexographic printing machine, and the nonwoven fabric sample of example 14 was dried and then coated with 0.46 mass% of the preparation. Liquid film-splitting agent, component (D1) and stearyl group (C)18) The content ratio (OPU) of the potassium phosphate salt is shown in Table 4.
(example 15)
The coating solution of example 13 was mixed with stearyl group (C)18) Potassium phosphate salt (neutralized potassium hydroxide product of Gripper 4131, product of Kao corporation) was mixed, and a 25 mass% diluted solution was prepared from ethanol. The diluted solution was applied to the same raw material nonwoven fabric as the nonwoven fabric produced in example 1 by a flexographic printing machine, and the nonwoven fabric sample of example 15 was dried and then coated with 0.46 mass% of the preparation. Liquid film-splitting agent, component (D1) and stearyl group (C)18) The content ratio (OPU) of the potassium phosphate salt is shown in Table 4.
(example 16)
A sanitary napkin sample of example 16 was produced in the same manner as in example 12, except that the following liquid film-splitting agent was used, and the content ratio (OPU) of the liquid film-splitting agent to the component (D1) was as shown in table 4.
< liquid film cleavage agent >
The liquid film cracking agent is polyoxypropylene (POP) modified dimethyl silicone, and X in the structure X-Y contains SiOC2H6Containing a group C3H6POP chain of O, addition of polyoxypropyleneThe number of moles was 12.
Surface tension: 21.0mN/m
Water solubility: less than 0.025g
Spreading coefficient with respect to a liquid having a surface tension of 50 mN/m: 29.0mN/m
Interfacial tension with respect to a liquid having a surface tension of 50 mN/m: 0.5mN/m
(example 17)
A sanitary napkin sample of example 17 was produced in the same manner as in example 12, except that the following liquid film-splitting agent was used and the content ratio (OPU) of the liquid film-splitting agent and the component (D1) was as shown in table 4.
< liquid film cleavage agent >
The liquid film cracking agent is POE modified dimethyl silicone (product name SH3775M, manufactured by Torredo Corning Co., Ltd.), and X in the structure X-Y contains Si (CH)3)2Dimethyl-silicone chain of O-, Y comprising a group containing- (C)2H4POE chain of O) -, the terminal group of the POE chain being methyl (CH)3) The modification ratio was 4%, the number of moles of oxyethylene added was 18, and the mass average molecular weight was 10800.
Surface tension: 17.0mN/m
Water solubility: less than 0.0001g
(example 18)
A nonwoven fabric sample of example 18 was produced in the same manner as in example 1, except that the following component (D2) was used instead of the component (D1).
< ingredient (D2) >
Polyethylene glycol (PEG) (trade name: polyethylene glycol 400, manufactured by Wako pure chemical industries, Ltd.)
(example 19)
The nonwoven fabric sample of example 19 was produced in the same manner as in example 18 except that the mixing ratio of the liquid film breaker and the component (D2) in the coating liquid was 7:13(35:65) by mass ratio and the content ratio (OPU) of the liquid film breaker and the component (D2) was as shown in table 5.
(example 20)
The nonwoven fabric sample of example 20 was produced in the same manner as in example 1, except that the following component (D2) was used instead of the component (D1).
< ingredient (D2) >
POE-POP diol (product name Pluronic L31, manufactured by ADEKA Co., Ltd.)
(example 21)
A nonwoven fabric sample of example 21 was produced in the same manner as in example 1, except that the following component (D2) was used instead of the component (D1).
< ingredient (D2) >
POE-POP diol (product name Pluronic L61, manufactured by ADEKA Co., Ltd.)
(example 22)
A nonwoven fabric sample of example 22 was produced in the same manner as in example 1, except that the following component (D2) was used instead of the component (D1).
< ingredient (D2) >
POE-POP diol (product name Pluronic L62, manufactured by ADEKA Co., Ltd.)
(example 23)
A nonwoven fabric sample of example 23 was produced in the same manner as in example 1, except that the diamide compound of the following component (D3) was used instead of the component (D1).
< ingredient (D3) >
N "N-bis (3-methoxypropyl) behenic acid diamide (manufactured by Kao corporation)
(example 24)
A nonwoven fabric sample of example 24 was produced in the same manner as in example 23, except that the mixing ratio of the liquid film breaking agent to the component (D3) in the coating liquid was 90:10 by mass and the content ratio (OPU) of the liquid film breaking agent to the component (D3) was as shown in table 6.
(example 25)
A nonwoven fabric sample of example 25 was produced in the same manner as in example 23 except that the liquid film cracking agent of example 1 was added with the component (D3) of example 23 and the component (D1) of example 7 to prepare a coating liquid, the mixing ratio of the liquid film cracking agent, the component (D3) and the component (D1) in the coating liquid was set to 36:2:2(90:5:5) in terms of mass ratio, and the content ratio (OPU) of the liquid film cracking agent, the component (D1) and the component (D3) was as shown in table 6.
(example 26)
(1) method for manufacturing raw material non-woven fabric
as the upper layer web, a core-sheath fiber of polyethylene terephthalate (PET)/Polyethylene (PE) having a fineness of 1.2dtex was used, and a basis weight of 10g/m was prepared2The upper web of (2). Further, using a PET/PE core-sheath fiber having a fineness of 5.6dtex, a base weight of 15g/m was prepared2The lower layer web of (a).
next, the upper layer web and the lower layer web were laminated, and subjected to hot air treatment to obtain a flat hot air nonwoven fabric. The obtained sample was cut into 400mm × 140mm size to prepare a raw material nonwoven fabric of example 26.
(2) Preparation of coating liquid
A coating solution was prepared in the same manner as in example 1.
(3) Production of nonwoven Fabric samples
The same procedure as in example 1 was repeated except for using the raw material nonwoven fabric and the coating liquid to prepare a nonwoven fabric sample of example 26.
(example 27)
A nonwoven fabric sample of example 27 was produced in the same manner as in example 26, except that the component (D1) of example 6 was used as the component (D1).
(example 28)
A nonwoven fabric sample of example 28 was produced in the same manner as in example 26 except that the liquid film cracking agent of example 1 was added with the component (D3) of example 23 and the component (D1) of example 7 to prepare a coating liquid, the mixing ratio of the liquid film cracking agent, the component (D3) and the component (D1) in the coating liquid was set to 36:2:2(90:5:5) in terms of mass ratio, and the content ratio (OPU) of the liquid film cracking agent, the component (D1) and the component (D3) was as shown in table 8.
Comparative example 1
A nonwoven fabric similar to the raw material nonwoven fabric produced in example 1 was produced as a nonwoven fabric sample of comparative example 1.
Comparative example 2
A nonwoven fabric similar to the raw material nonwoven fabric produced in example 24 was produced as a nonwoven fabric sample of comparative example 2.
(reference example 1)
A nonwoven fabric sample of reference example 1 was produced in the same manner as in example 1, except that the components (D1) to (D3) were not included, and a liquid film breaking agent was applied in an amount of 0.4 mass% in the content ratio (OPU) with respect to the mass of the nonwoven fabric.
(reference example 2)
A nonwoven fabric sample of reference example 2 was produced in the same manner as in example 24, except that the components (D1) to (D3) were not included, and a liquid film breaking agent was applied in an amount of 0.4 mass% in the content ratio (OPU) with respect to the mass of the nonwoven fabric.
In each of examples, comparative examples, and reference examples, the fibers of the raw material nonwoven fabric used were fibers previously coated with a fiber treatment agent in the fiber production process. The fiber treatment agent contains a water-soluble surfactant.
In each example, the coating liquid (a preparation obtained by blending 1 or more components selected from the components (D1) to (D3) with a water-repellent liquid film-splitting agent at a predetermined ratio) was applied from above. That is, as shown in fig. 1 (B), the fiber treatment agent is formed into the intermediate layer 7, and the coating liquid is formed into the mixed layer 5 and disposed on the outermost surface layer of the fiber. The component (D1) has a specific structure (linear POE nonionic) and a melting point (15 ℃ to 22 ℃) and is therefore hardly soluble in water and hardly decreases in surface tension. In particular, the component (D1) is a compound in which the solubility in water is increased and the surface tension is reduced with difficulty by using a silicone surfactant in which the number of moles of oxyalkylene groups added in the POA group is 30 moles or more and the number of moles of oxyethylene groups added in the POE group is larger than the number of moles of oxypropylene groups added in the POP group as in example 6. The component (D2) is not a surfactant but is water-soluble, and has a structure having only a hydrophilic group (PEG, PPG), and therefore is structurally different from the fiber treatment agent in nature. The component (D3) is a compound that is water-insoluble and has properties similar to those of oils having no hydrophilic group, and therefore, is different from the fiber-treating agent in both structure and properties.
(test method)
[1] Change in surface tension of body fluid
Based on the above (method of measuring the rate of decrease in surface tension of body fluid), the changes in surface tension of body fluid due to the components (D1) to (D3) used in each example were tested. In this test, a test solution having a surface tension of 49mN/m was used.
[2] Liquid residual quantity of non-woven fabric sample
(1) Examples 1 to 25, comparative example 1, and reference example 1:
The surface sheet was removed from a sanitary napkin (manufactured by Kao corporation, trade name Lauriier F air-permeable Robushi, 22.5cm, 2016), and each nonwoven fabric sample was used as a surface sheet, and the upper layer side was laminated upward and fixed to the periphery to obtain a sanitary napkin sample for evaluation.
An acrylic plate having a through hole with an inner diameter of 1cm was superposed on the surface of each sanitary napkin sample, and a constant load of 100Pa was applied to the napkin. Under this load, 6.0g of mock blood (obtained by adjusting horse defibrinated blood produced by the Japanese BIOTEST research to 8.0 cP) corresponding to menstrual blood was allowed to flow through the permeation holes of the acrylic plate. The used simulated blood was adjusted at 30rpm using a TVB10 model viscometer manufactured by eastern mechanical industries, ltd. When left standing, the equine defibrinated blood precipitates in a highly viscous portion (such as erythrocytes) and remains in a supernatant form in a less viscous portion (such as plasma). The mixing ratio of this portion was adjusted in such a way as to reach 8.0 cP. The acrylic plate was removed 60 seconds after the inflow of 6.0g of the total of the simulated blood. Subsequently, the mass of the nonwoven fabric sample was measured (W2), and the difference (W2-W1) between the mass and the mass (W1) of the nonwoven fabric sample measured in advance before the flow of the blood simulant was measured was calculated. The above operation was carried out 3 times, and the average of the 3 times was taken as the liquid residual amount (mg). The liquid remaining amount is an index of how wet the skin of the wearer is, and the effect of reducing the liquid remaining amount is higher as the liquid remaining amount is smaller.
(2) Examples 26 to 28, comparative example 2, and reference example 2:
In this test, as an absorbent body laminated on each nonwoven fabric sample, an absorbent body obtained by curing an adhesive by blowing cold air from a Marys (registered trademark) pants type M (manufactured by 2018) manufactured by kaowa corporation was used.
A nonwoven fabric sample to be measured was drawn in a square of 7 cm. times.7 cm with the injection point as the center.
The injection point of the nonwoven fabric sample was aligned with the center of the absorbent body, and the nonwoven fabric sample was uniformly applied at 20g/cm in a state where the nonwoven fabric sample was placed on the absorbent body2The load of (2). The cross section area is 1000mm2The tube (2) was brought into contact with the substantially center of the specimen, 40g of artificial urine was passed through the tube 4 times at a rate of 5.0 g/sec at intervals of 10 minutes from the start of injection, 160g of the artificial urine was injected in total, and then the tube was left for 10 minutes.
Subsequently, the nonwoven fabric was cut out along a rectangle of 7cm × 7cm drawn in advance with a blade, and the mass thereof was measured (W4). Thereafter, the nonwoven fabric was put into a drier at 100 ℃ and sufficiently dried, and the mass was measured again (W3). The mass (W4) -mass (W3) was defined as the residual liquid amount. The above operation was carried out 3 times, and the average of the 3 times was taken as the liquid residual amount (mg).
The supply of the artificial urine to the nonwoven fabric 10 was performed by guiding the discharge port of the liquid to the upper side of 10mm of the nonwoven fabric supported on the absorber by a silicon tube and using a liquid injection pump (MCP-J manufactured by ISMATEC).
The supply amount of 160g is an average excretion amount assumed for an infant. The supply rate of 5.0 g/sec is the urination rate when excretion of an infant is assumed.
[3] Liquid flow length of nonwoven surface (surface liquid flow)
(1) Examples 1 to 25, comparative example 1, and reference example 1:
The same samples as those of the sanitary napkin for evaluation used in (1) of [2] above were prepared.
The test apparatus used was an apparatus having a mounting portion in which the mounting surface of the test specimen was inclined at 45 ° to the horizontal plane. Each sanitary napkin sample was placed on the placement unit so that the nonwoven fabric sample faced upward. 0.5g of a simulant blood was dropped onto the surface of each sanitary napkin sample at a rate of 0.1 g/sec. The distance from the point where the liquid first applied to the nonwoven fabric to the point where the test liquid was introduced into the nonwoven fabric and did not flow was measured. The used simulated blood was adjusted by the same method as in (1) of [2 ]. The above operation was performed 3 times, and the average of the 3 times was defined as the flow length (mm). The liquid flow length is an index of how much liquid flows on the surface without being absorbed by the test sample and easily leaks when worn, and the shorter the liquid flow length, the higher the evaluation.
(2) Examples 26 to 28, comparative example 2, and reference example 2:
In a state where a nonwoven fabric sample was placed on the same absorbent body as in (2) of the above [2], an injection point was drawn at the center of the absorbent body, a slope inclined at 30 ° was formed, the absorbent body was fixed to an acrylic plate so that the sample did not move, and artificial urine prepared in the same manner as in (2) of the above [2] was injected at a speed of 5.0 g/sec from the injection point.
At this time, the distance that the artificial urine flows from the injection point on the surface of the nonwoven fabric is defined as the liquid flow distance. The above operation was performed 3 times, and the average of the 3 times was defined as the flow length (mm).
the test results for the above examples, comparative examples and reference examples are shown in tables 4 to 9 below. In addition, it was confirmed that a mixed layer of 1 or more selected from the components (D1), (D2) and (D3) and a liquid film cracking agent was formed on the outermost surface layer (surface) of the fibers in the nonwoven fabric samples of examples 1 to 28, as shown in fig. 1 (a).
[ Table 4]
[ Table 5]
TABLE 5
[ Table 6]
TABLE 6
[ Table 7]
TABLE 7
[ Table 8]
TABLE 8
[ Table 9]
TABLE 9
As shown in tables 4 to 9, in comparative example 1 containing no liquid film-breaking agent, the liquid-remaining amount was 269 mg. On the other hand, in examples 1 to 25, the residual liquid amount was suppressed to about half to one third of that in comparative example 1, and effective cracking of the liquid film was confirmed. In comparative example 2 containing no liquid film-splitting agent, the residual liquid amount was 162mg, whereas in examples 26 to 28, the residual liquid amount was suppressed to about half to one third of that in comparative example 2, and effective splitting of the liquid film was confirmed. As described above, the liquid film cracking agents of examples 1 to 28 were high in the effect of reducing liquid residue.
On the other hand, in reference examples 1 and 2, the liquid film cleavage agent was contained only, and none of the components (D1) to (D3) was contained, and therefore, the flow length value of the nonwoven fabric surface of the comparative example was small.
On the other hand, in examples 1 to 28, since the liquid film cracking agent and 1 or more components selected from the components (D1), (D2) and (D3) were contained, the liquid flow length on the surface of the nonwoven fabric was suppressed as compared with reference examples 1 and 2. Further, in examples 1 to 28, the surface tension of the test liquid (corresponding to the body fluid) passed through the nonwoven fabric sample was maintained, which was comparable to comparative examples 1 and 2 and reference examples 1 and 2. That is, in examples 1 to 28, even when the components (D1) to (D3) for imparting hydrophilicity to the nonwoven fabric were contained, the decrease in surface tension of the test liquid was suppressed, and the lower the rate of decrease in surface tension, the more the effect of the liquid film cracking agent was exerted, and the lower the amount of the remaining liquid was suppressed.
As described above, in examples 1 to 28, the improvement of the liquid retention reduction and the improvement of the liquid flow prevention performance can be achieved at the same time.
The present invention has been described in connection with the embodiments and examples thereof, but the present invention is not limited to any of the details of the description so long as the inventors and the like do not particularly specify, and it is considered that it should be broadly construed without departing from the spirit and scope of the invention as set forth in the appended claims.
The present application claims priority based on japanese patent application 2017-119147 filed in japan on 6/16/2017, which is incorporated herein by reference and the contents of which are incorporated as part of the description of the present specification.
Description of the reference numerals
1 fiber
5 mixing layer
7 intermediate layer

Claims (60)

1. A nonwoven fabric containing a liquid film-splitting agent, wherein the reduction rate of the surface tension is less than 25% in the method for measuring the reduction rate of the surface tension of a body fluid,
Method for measuring rate of decrease in surface tension of body fluid:
(1) A test solution was prepared, the surface tension of which was measured by the plate method in an environmental region at a temperature of 25 ℃ and a relative humidity RH of 65%,
Test solution: a liquid obtained by allowing 100mL of equine defibrinated blood to stand at a temperature of 22 ℃ and a humidity of 65% for 1 hour, mixing the liquids separated into the upper layer and the lower layer, and adjusting the mixing ratio so that the viscosity becomes 8.0 cP;
(2) Then, preparing a nonwoven fabric coated with components other than the liquid film breaking agent among the components disposed on the fiber surface of the nonwoven fabric, the amount of the components to be coated being determined by identifying the structure, amount, and ratio of the components extracted from the nonwoven fabric, attaching the coated nonwoven fabric as a measurement object directly to a petri dish having a diameter of 5cm × 5cm, and repeatedly passing the test solution 3g at a time, for a total of 15 g;
(3) Measuring the surface tension of the liquid having passed through by the plate method used in the above (1);
(4) The rate of decrease in the surface tension of the body fluid after passing through the nonwoven fabric in (3) with respect to the surface tension of the test liquid before passing through the nonwoven fabric in (1) was calculated, and the unit of the rate of decrease was%.
2. A nonwoven fabric comprising 1 or more compounds selected from the group consisting of the following compound C1 and the following compound C2, wherein the reduction rate of surface tension is less than 25% in the following method for measuring the reduction rate of surface tension of body fluid,
C1: a compound having a spreading factor of 15mN/m or more relative to a liquid having a surface tension of 50mN/m and a water solubility of 0g to 0.025g,
c2: a compound having a spreading coefficient of more than 0mN/m with respect to a liquid having a surface tension of 50mN/m, a water solubility of 0g or more and 0.025g or less, and an interfacial tension of 20mN/m or less with respect to a liquid having a surface tension of 50mN/m,
Method for measuring rate of decrease in surface tension of body fluid:
(1) A test solution was prepared, the surface tension of which was measured by the plate method in an environmental region at a temperature of 25 ℃ and a relative humidity RH of 65%,
Test solution: a liquid obtained by allowing 100mL of equine defibrinated blood to stand at a temperature of 22 ℃ and a humidity of 65% for 1 hour, mixing the liquids separated into the upper layer and the lower layer, and adjusting the mixing ratio so that the viscosity becomes 8.0 cP;
(2) Then, preparing a nonwoven fabric coated with components other than the compound C1 and the compound C2 among the components disposed on the surface of the nonwoven fabric fibers, the amount of the components to be coated being determined by identifying the structure, amount, and ratio of the components extracted from the nonwoven fabric, attaching the coated nonwoven fabric as a measurement object directly to a petri dish having a diameter of 5cm × 5cm, repeatedly passing the test solution 3g at a time, and passing 15g in total;
(3) Measuring the surface tension of the liquid having passed through by the plate method used in the above (1);
(4) The rate of decrease in the surface tension of the body fluid after passing through the nonwoven fabric in (3) with respect to the surface tension of the test liquid before passing through the nonwoven fabric in (1) was calculated, and the unit of the rate of decrease was%.
3. The nonwoven fabric according to claim 1 or 2, wherein the reduction rate of the surface tension is 23% or less, preferably 17% or less, more preferably 12% or less, and still more preferably 0%.
4. The nonwoven fabric according to any one of claims 1 to 3, further comprising 1 or more members selected from the group consisting of D1, D2 and D3,
D1: a nonionic surfactant;
D2: a compound having a surface tension of 42mN/m or more;
D3: a compound having a melting point of 40 ℃ or higher, being more hydrophilic than the liquid film cracking agent, and having no hydrophilic group.
5. A nonwoven fabric comprising a liquid film-splitting agent and 1 or more components selected from the group consisting of D1, D2 and D3,
D1: a nonionic surfactant;
D2: a compound having a surface tension of 42mN/m or more;
D3: a compound having a melting point of 40 ℃ or higher, being more hydrophilic than the liquid film cracking agent, and having no hydrophilic group.
6. A nonwoven fabric, comprising:
1 or more compounds selected from the group consisting of the compound C1 described below and the compound C2 described below, and 1 or more components selected from the group consisting of the components D1, D2, and D3 described below,
C1: a compound having a spreading factor of 15mN/m or more relative to a liquid having a surface tension of 50mN/m and a water solubility of 0g or more and 0.025g or less;
C2: a compound having a spreading coefficient of more than 0mN/m with respect to a liquid having a surface tension of 50mN/m, a water solubility of 0g or more and 0.025g or less, and an interfacial tension of 20mN/m or less with respect to a liquid having a surface tension of 50 mN/m;
D1: a nonionic surfactant;
D2: a compound having a surface tension of 42mN/m or more;
D3: a compound having a melting point of 40 ℃ or higher, being more hydrophilic than the compound C1, and having no hydrophilic group.
7. A nonwoven fabric as defined in any of claims 1-6, further comprising an anionic surfactant of the phosphate ester type.
8. The nonwoven fabric according to any one of claims 4 to 7, wherein the mass ratio of the total amount of the components D1, D2 and D3 to the total amount of the liquid film breaking agent or the total amount of the compound C1 and the compound C2, that is, the total mass of the components D1, D2 and D3/the mass of the liquid film breaking agent or the total mass of the compound 1 and the compound 2, is 0.25 or more and 9 or less, preferably 0.43 or more, more preferably 0.53 or more, and further preferably 4 or less, more preferably 2.3 or less.
9. The nonwoven fabric according to any one of claims 4 to 7, wherein the mass ratio of the total amount of the components D1, D2 and D3 to the total amount of the liquid film breaking agent or the total amount of the compound C1 and the compound C2, that is, the total mass of the components D1, D2 and D3/the mass of the liquid film breaking agent or the total mass of the compound (1) and the compound (2), is 0.53 or more and 2.3 or less.
10. The nonwoven fabric according to any one of claims 4 to 9, wherein the total amount of the components D1, D2, and D3 is 0.06 mass% or more and 3 mass% or less, preferably 0.1 mass% or more, more preferably 0.14 mass% or more, and further preferably 2.3 mass% or less, more preferably 1 mass% or less in the content ratio OPU with respect to the mass of the nonwoven fabric.
11. The nonwoven fabric according to any one of claims 4 to 9, wherein the total amount of the components D1, D2, and D3 is 0.06 mass% or more and 1 mass% or less in a content ratio OPU with respect to the mass of the nonwoven fabric.
12. The nonwoven fabric according to any of claims 4 to 11, wherein the component D1 has solubility in water alone.
13. the nonwoven fabric according to any of claims 4 to 12, wherein the solubility of component D1 in water alone is: when a 2.5 wt% aqueous solution of component D1 was prepared by immersing the solution in water alone for 20 minutes, the height of foam was 10mm or more, preferably 20mm or less, more preferably 18mm or less, still more preferably 15mm or less as determined by the following measurement,
method for measuring foaming height of aqueous solution of component D1 after shaking:
First, 0.2g of component D1 was weighed, poured into a screw tube of No.4, tube diameter 24mm and full length 53mm manufactured by Maruemu, 8.0g of deionized water was further poured, and then left to stand for 20 minutes to be sufficiently dissolved in deionized water to prepare an aqueous solution,
Next, the coil was strongly oscillated in the vertical direction for 2 times, and then rapidly placed on a horizontal surface, and after 10 seconds elapsed from immediately after oscillation, the height of the structure layer of the aqueous solution, that is, the height from the liquid surface of the liquid layer to the upper surface of the structure layer containing air was measured, and this height was defined as the height of bubbling of the aqueous solution of the component D1 after oscillation.
14. The nonwoven fabric according to any of claims 4 to 12, wherein the solubility of component D1 in water alone is: when a 2.5 wt% aqueous solution of component D1 was prepared by immersing the solution in water alone for 20 minutes, the height of foam was 10mm to 15mm as determined by the following measurement,
Method for measuring foaming height of aqueous solution of component D1 after shaking:
First, 0.2g of component D1 was weighed, poured into a screw tube of No.4, tube diameter 24mm and full length 53mm manufactured by Maruemu, 8.0g of deionized water was further poured, and then left to stand for 20 minutes to be sufficiently dissolved in deionized water to prepare an aqueous solution,
Next, the screw was strongly oscillated in the vertical direction for 2 times, and then rapidly placed on a horizontal surface, and after 10 seconds elapsed from immediately after oscillation, the height of the structure layer of the aqueous solution, that is, the height from the liquid surface of the liquid layer to the upper surface of the structure layer containing air was measured, and this height was defined as the height of bubbling after oscillation of the aqueous solution of component D1.
15. The nonwoven fabric according to any one of claims 4 to 14, wherein the component D1 comprises a compound having a higher HLB value than the liquid film breaking agent or 1 or more compounds selected from the compound C1 and the compound C2.
16. The nonwoven fabric according to any one of claims 4 to 15, wherein the component D1 contains a compound having an HLB value of 10 or more and 20 or less, preferably 11 or more, more preferably 13 or more, and preferably 17 or less, more preferably 15 or less.
17. the nonwoven fabric according to any one of claims 4 to 15, wherein the component D1 contains a compound having an HLB value of 13 or more and 15 or less.
18. the nonwoven fabric according to any one of claims 4 to 17, wherein the component D1 contains a compound having a melting point of 5 ℃ or more and less than 25 ℃, preferably 10 ℃ or more, more preferably 15 ℃ or more, and further preferably 24 ℃ or less, more preferably 22 ℃ or less.
19. The nonwoven fabric according to any one of claims 4 to 17, wherein the component D1 contains a compound having a melting point of 15 ℃ or higher and 22 ℃ or lower.
20. The nonwoven fabric according to any one of claims 4 to 19, wherein the component D1 contains at least 1 selected from a hydrocarbon-based nonionic surfactant and a silicone-based nonionic surfactant.
21. The nonwoven fabric according to any one of claims 4 to 20, wherein the nonionic surfactant of component D1 has at least 1 selected from the group consisting of a polyethylene oxide type, a polyol type, a block polymer type, and a nitrogen-containing type as a hydrophilic group, and has an alkyl chain or a silicone chain other than a polyol fatty acid skeleton as a hydrophobic group.
22. The nonwoven fabric according to any one of claims 4 to 21, wherein the component D1 has at least a polyoxyethylene group as a hydrophilic group.
23. The nonwoven fabric according to any one of claims 4 to 22, wherein the nonionic surfactant of component D1 comprises at least 1 selected from the group consisting of D11 and D12,
D11: a hydrocarbon-based nonionic surfactant having a foaming height after shaking of an aqueous solution of 10mm or more, having a group consisting of only polyoxyethylene groups or a group containing polyoxyethylene groups and other polyoxyalkylene groups as a hydrophilic group, and having a linear hydrocarbon chain or a branched hydrocarbon chain excluding a polyol fatty acid skeleton as a hydrophobic group;
D12: a silicone nonionic surfactant having a foaming height after shaking of an aqueous solution of 10mm or more, having a group consisting of only polyoxyethylene groups or a group containing polyoxyethylene groups and other polyoxyalkylene groups as a hydrophilic group, and having a linear silicone chain or a branched silicone chain as a hydrophobic group.
24. The nonwoven fabric according to any one of claims 4 to 23, wherein the nonionic surfactant of component D1 comprises at least 1 selected from the group consisting of D11-1, D11-2, D12-1 and D12-2,
D11-1: a hydrocarbon-based nonionic surfactant which is a linear polyoxyethylene alkyl ether having a polyoxyethylene group as a hydrophilic group, the polyoxyethylene group having a number of moles of addition of oxyethylene of 5 or more, and a linear hydrocarbon chain having 10 or more and 22 or less carbon atoms as a hydrophobic group;
D11-2: a hydrocarbon-based nonionic surfactant having a copolymer of a polyoxypropylene group and a polyoxyethylene group, as a hydrophilic group, wherein the number of moles of oxyethylene added to the polyoxyethylene group is 5 moles or more and the number of moles of oxypropylene added to the polyoxypropylene group is 3 moles or less, and having a linear hydrocarbon chain as a hydrophobic group;
D12-1: a silicone nonionic surfactant having a polyoxyethylene group in a linear silicone chain, the silicone nonionic surfactant being a side chain-modified silicone;
D12-2: a silicone nonionic surfactant having a linear silicone chain side chain-modified, wherein a copolymer in which the number of moles of oxyethylene added to a polyoxyethylene group and the number of moles of oxypropylene added to a polyoxypropylene group add to 30 moles or more and the number of moles of oxyethylene added to a polyoxyethylene group is greater than the number of moles of oxypropylene added to a polyoxypropylene group is used as a hydrophilic group.
25. The nonwoven fabric according to any one of claims 4 to 24, wherein the component D1 contains a hydrocarbon-based nonionic surfactant having a melting point of 20 ℃ or higher, having a polyoxyethylene group as a hydrophilic group in which the number of moles of oxyethylene added is 9 moles, and having a lauryl group as a hydrophobic group.
26. The nonwoven fabric according to any of claims 4 to 25, wherein the nonionic surfactant of component D1 comprises at least 1 selected from the group consisting of,
< Hydrocarbon-based nonionic surfactant >
Polyethylene oxide type nonionic surfactant: polyoxyethylene alkyl ethers, polyoxyethylene fatty acid esters;
Polyhydric alcohol type nonionic surfactant: sorbitan monoalkylates, polyoxyethylene sorbitan monoalkylates, glycerol monoalkylates, polyglyceryl monoalkylates, alkyl glucosides, pentaerythritol monoalkylates;
Block polymer type nonionic surfactant: alkyl ethers of polyoxyethylene polyoxypropylene glycol, polyoxyethylene polyoxypropylene alkyl ethers;
Nitrogen-containing nonionic surfactant: polyoxyethylene alkylamines, alkyl polyoxyethylene fatty acid amides;
< Silicone nonionic surfactant >
A silicone nonionic surfactant which contains 1 or more polyoxyethylene groups and has a maximum number of moles of oxyethylene groups in the polyoxyethylene groups, wherein the number of moles of oxyalkylene groups in the polyoxyalkylene groups added is 30 moles or more, and which is a polyoxyethylene polyoxypropylene-modified silicone.
27. the nonwoven fabric according to any one of claims 4 to 26, wherein the nonionic surfactant of component D1 has a mass-average molecular weight of 50 or more and 1500 or less, preferably 100 or more, more preferably 200 or more, and preferably 1000 or less, more preferably 750 or less.
28. The nonwoven fabric according to any of claims 4 to 27, wherein the component D2 comprises a compound having a surface tension higher than that of a liquid film cleavage agent or 1 or more compounds selected from the group consisting of the compound C1 and the compound C2.
29. The nonwoven fabric according to any one of claims 4 to 28, wherein the component D2 contains a compound having a surface tension of 42mN/m or more and 60mN/m or less, preferably 42.5mN/m or more, more preferably 43mN/m or more, and further preferably 55mN/m or less, more preferably 50mN/m or less.
30. the nonwoven fabric according to any one of claims 4 to 28, wherein the component D2 contains a compound having a surface tension of 43mN/m or more and 50mN/m or less.
31. The nonwoven fabric according to any one of claims 4 to 30, wherein the component D2 contains a compound composed only of a structure having a hydrophilic group.
32. The nonwoven fabric according to claim 31, wherein the component D2 comprises a compound having the following structure as a structure having the hydrophilic group:
Has a polyoxyethylene structure or a block copolymer of a polyoxyethylene group and a polyoxypropylene group.
33. The nonwoven fabric according to any of claims 4 to 32, wherein the component D2 comprises 1 or more selected from polyethylene glycol and a copolymer of polypropylene glycol and polyethylene glycol.
34. The nonwoven fabric according to any one of claims 4 to 33, wherein the compound contained in the component D2 has a mass-average molecular weight of 200 or more and 10000 or less, 300 or more, preferably 400 or more, and preferably 8000 or less, more preferably 6000 or less.
35. The nonwoven fabric according to any one of claims 4 to 33, wherein the compound contained in the component D2 has a mass-average molecular weight of 400 or more and 6000 or less.
36. The nonwoven fabric according to any one of claims 4 to 35, wherein when the component D2 contains a copolymer of a polyoxyethylene compound and a polyoxypropylene compound, the polymerization ratio of the polyoxypropylene compound POP to the polyoxyethylene compound POE, i.e., the polymerization degree of POP/the polymerization degree of POE, is more than 0 and 10 or less, preferably 5 or more, more preferably 6.5 or more, and preferably 8 or less, more preferably 7 or less.
37. The nonwoven fabric according to any one of claims 4 to 35, wherein when the component D2 contains a copolymer of a polyoxyethylene compound and a polyoxypropylene compound, the polymerization ratio of the polyoxypropylene compound POP to the polyoxyethylene compound POE, i.e., the polymerization degree of POP/the polymerization degree of POE, is 6.5 or more and 7 or less.
38. The nonwoven fabric according to any one of claims 4 to 37, wherein the component D2 contains 1 or more selected from polyethylene glycol having a mass average molecular weight of 400 and a compound obtained by polymerizing polyethylene glycol and polypropylene glycol at a mass ratio of about 1: 7.
39. the nonwoven fabric according to any one of claims 4 to 38, wherein the component D3 contains a compound having a melting point of 40 ℃ or higher and 120 ℃ or lower, preferably 50 ℃ or higher, more preferably 60 ℃ or higher, and further preferably 110 ℃ or lower, and more preferably 100 ℃ or lower.
40. The nonwoven fabric according to any one of claims 4 to 38, wherein the component D3 contains a compound having a melting point of 60 ℃ or higher and 100 ℃ or lower.
41. a nonwoven fabric as claimed in any of claims 4 to 40, wherein component D3 comprises a compound having a water solubility of 0.01g or less, preferably 0.001g or less, more preferably less than 0.0001 g.
42. the nonwoven fabric according to any one of claims 4 to 41, wherein the compound contained in the component D3 has a mass-average molecular weight of 200 or more and 5000 or less, preferably 300 or more, more preferably 400 or more, and preferably 4000 or less, more preferably 3000 or less.
43. The nonwoven fabric according to any one of claims 4 to 41, wherein the compound contained in the component D3 has a mass-average molecular weight of 400 or more and 3000 or less.
44. The nonwoven fabric according to any one of claims 4 to 43, wherein the component D3 comprises a hydrocarbon compound.
45. The nonwoven fabric according to any one of claims 4 to 44, wherein the component D3 comprises a diamide compound.
46. The nonwoven fabric according to any of claims 4 to 45, wherein the component D3 comprises N "N-bis (3-methoxypropyl) behenic acid diamide.
47. The nonwoven fabric according to any of claims 4 to 46, wherein the component D3 comprises a compound that is more hydrophilic than the liquid film breaking agent or the compound C1, and more hydrophilic than the liquid film breaking agent or the compound C1 means that the IOB value of the component D3 is greater than the IOB value of the liquid film breaking agent or the compound C1.
48. The nonwoven fabric according to claim 47, wherein the component D3 contains a compound having an IOB value of 0.7 or more and 0.9 or less, preferably 0.75 or more, and more preferably 0.85 or less.
49. The nonwoven fabric according to claim 47, wherein the component D3 contains a compound having an IOB value of 0.75 or more and 0.85 or less.
50. The nonwoven fabric according to any one of claims 4 to 49, wherein the liquid film cleavage agent or the compound C1 contains a compound having an IOB value of 0.3 or more and 0.8 or less, preferably 0.45 or more, more preferably 0.55 or more, further preferably 0.7 or less, more preferably 0.65 or less.
51. The nonwoven fabric according to any one of claims 4 to 49, wherein the liquid film cleavage agent or the compound C1 contains a compound having an IOB value of 0.55 or more and 0.65 or less.
52. The nonwoven fabric according to any one of claims 4 to 51, wherein the liquid film cleavage agent or the compound C2 contains a compound having an IOB value of 0 or more and 0.6 or less, preferably 0.05 or more, more preferably 0.1 or more, further preferably 0.5 or less, more preferably 0.4 or less.
53. The nonwoven fabric according to any one of claims 4 to 51, wherein the liquid film cleavage agent or the compound C2 contains a compound having an IOB value of 0.1 or more and 0.4 or less.
54. The nonwoven fabric according to any one of claims 4 to 53, wherein a mixed layer of the liquid film cracking agent or 1 or more compounds selected from the group consisting of the compound C1 and the compound C2 and 1 or more components selected from the group consisting of the components D1, D2, and D3 is provided on an outermost surface layer of fibers constituting the nonwoven fabric.
55. An absorbent article having the nonwoven fabric according to any one of claims 1 to 54.
56. An absorbent article having a topsheet and an absorber, the absorbent article having the nonwoven fabric according to any one of claims 1 to 54 as the topsheet.
57. A fiber-treating agent comprising a liquid film-splitting agent and 1 or more selected from the following components D1, D2 and D3,
D1: a nonionic surfactant;
D2: a compound having a surface tension of 42mN/m or more;
d3: a compound having a melting point of 40 ℃ or higher, being more hydrophilic than the liquid film cracking agent, and having no hydrophilic group.
58. A fiber treatment agent comprising:
1 or more compounds selected from the group consisting of the following compound C1 and the following compound C2; and
1 or more components selected from the following components D1, D2 and D3,
C1: a compound having a spreading factor of 15mN/m or more relative to a liquid having a surface tension of 50mN/m and a water solubility of 0g or more and 0.025g or less;
C2: a compound having a spreading coefficient of more than 0mN/m with respect to a liquid having a surface tension of 50mN/m, a water solubility of 0g or more and 0.025g or less, and an interfacial tension of 20mN/m or less with respect to a liquid having a surface tension of 50 mN/m;
d1: a nonionic surfactant;
D2: a compound having a surface tension of 42mN/m or more;
D3: a compound having a melting point of 40 ℃ or higher, being more hydrophilic than the compound C1, and having no hydrophilic group.
59. A use of a nonwoven fabric containing 1 or more compounds selected from the group consisting of the following compound C1 and the following compound C2, the nonwoven fabric having a reduction rate of surface tension of less than 25% in the method for measuring a reduction rate of surface tension of body fluid,
c1: a compound having a spreading factor of 15mN/m or more relative to a liquid having a surface tension of 50mN/m and a water solubility of 0g or more and 0.025g or less;
C2: a compound having a spreading coefficient of more than 0mN/m with respect to a liquid having a surface tension of 50mN/m, a water solubility of 0g or more and 0.025g or less, and an interfacial tension of 20mN/m or less with respect to a liquid having a surface tension of 50mN/m,
Method for measuring rate of decrease in surface tension of body fluid:
(1) A test solution was prepared, the surface tension of which was measured by the plate method in an environmental region at a temperature of 25 ℃ and a relative humidity RH of 65%,
Test solution: a liquid obtained by allowing 100mL of equine defibrinated blood to stand at a temperature of 22 ℃ and a humidity of 65% for 1 hour, mixing the liquids separated into the upper layer and the lower layer, and adjusting the mixing ratio so that the viscosity becomes 8.0 cP;
(2) Then, preparing a nonwoven fabric coated with components other than the compound C1 and the compound C2 among the components disposed on the surface of the nonwoven fabric fibers, the amount of the components to be coated being determined by identifying the structure, amount, and ratio of the components extracted from the nonwoven fabric, attaching the coated nonwoven fabric as a measurement object directly to a petri dish having a diameter of 5cm × 5cm, repeatedly passing the test solution 3g at a time, and passing 15g in total;
(3) Measuring the surface tension of the liquid having passed through by the plate method used in the above (1);
(4) the rate of decrease in the surface tension of the body fluid after passing through the nonwoven fabric in (3) with respect to the surface tension of the test liquid before passing through the nonwoven fabric in (1) was calculated, and the unit of the rate of decrease was%.
60. Use of a non-woven fabric comprising 1 or more compounds selected from the group consisting of the following compound C1 and the following compound C2, and 1 or more components selected from the group consisting of the following components D1, D2 and D3 for liquid film splitting,
C1: a compound having a spreading factor of 15mN/m or more relative to a liquid having a surface tension of 50mN/m and a water solubility of 0g or more and 0.025g or less;
C2: a compound having a spreading coefficient of more than 0mN/m with respect to a liquid having a surface tension of 50mN/m, a water solubility of 0g or more and 0.025g or less, and an interfacial tension of 20mN/m or less with respect to a liquid having a surface tension of 50 mN/m;
D1: a nonionic surfactant;
D2: a compound having a surface tension of 42mN/m or more;
D3: a compound having a melting point of 40 ℃ or higher, being more hydrophilic than the compound C1, and having no hydrophilic group.
CN201880028404.8A 2017-06-16 2018-06-14 Absorbent article Active CN110573671B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2017-119147 2017-06-16
JP2017119147 2017-06-16
PCT/JP2018/022797 WO2018230665A1 (en) 2017-06-16 2018-06-14 Absorbent article

Publications (2)

Publication Number Publication Date
CN110573671A true CN110573671A (en) 2019-12-13
CN110573671B CN110573671B (en) 2022-06-14

Family

ID=64660236

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201880028404.8A Active CN110573671B (en) 2017-06-16 2018-06-14 Absorbent article

Country Status (4)

Country Link
JP (1) JP6650489B2 (en)
CN (1) CN110573671B (en)
RU (1) RU2744857C1 (en)
WO (1) WO2018230665A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022147053A (en) * 2021-03-23 2022-10-06 大王製紙株式会社 Disposable wearable article and manufacturing method thereof
JP2022147055A (en) * 2021-03-23 2022-10-06 大王製紙株式会社 Disposable wearable article and manufacturing method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101678144A (en) * 2007-05-15 2010-03-24 宝洁公司 Absorbent article with hydrophilic lotion and high-barrier cuffs
CN101678142A (en) * 2007-05-15 2010-03-24 宝洁公司 Use of a lotion composition on an absorbent article for reducing adherence of feces or menses to the skin
WO2016102470A1 (en) * 2014-12-22 2016-06-30 Schill + Seilacher Gmbh Composition for the permanent hydrophilic finishing of textile fibres and textile products
CN106715786A (en) * 2014-12-17 2017-05-24 花王株式会社 Liquid film cleavage agent

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3057521B2 (en) * 1991-01-22 2000-06-26 東邦化学工業株式会社 Polyolefin fiber durable hydrophilizing agent
JP4079751B2 (en) * 2002-11-05 2008-04-23 旭化成せんい株式会社 Hydrophilic polyolefin nonwoven fabric
RU2359650C2 (en) * 2004-09-30 2009-06-27 Дайо Пейпер Корпорейшн Absorbing product
JP5277131B2 (en) * 2009-09-29 2013-08-28 松本油脂製薬株式会社 Water permeability imparting agent, water permeable fiber, and method for producing nonwoven fabric
JP6322040B2 (en) * 2013-04-30 2018-05-09 三洋化成工業株式会社 Permeability imparting agent
JP6360399B2 (en) * 2013-12-12 2018-07-18 花王株式会社 Long fiber nonwoven fabric

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101678144A (en) * 2007-05-15 2010-03-24 宝洁公司 Absorbent article with hydrophilic lotion and high-barrier cuffs
CN101678142A (en) * 2007-05-15 2010-03-24 宝洁公司 Use of a lotion composition on an absorbent article for reducing adherence of feces or menses to the skin
CN106715786A (en) * 2014-12-17 2017-05-24 花王株式会社 Liquid film cleavage agent
WO2016102470A1 (en) * 2014-12-22 2016-06-30 Schill + Seilacher Gmbh Composition for the permanent hydrophilic finishing of textile fibres and textile products

Also Published As

Publication number Publication date
CN110573671B (en) 2022-06-14
RU2744857C1 (en) 2021-03-16
WO2018230665A1 (en) 2018-12-20
JP6650489B2 (en) 2020-02-19
JP2019002122A (en) 2019-01-10

Similar Documents

Publication Publication Date Title
JP6051333B1 (en) Liquid film cleaving agent
CN108291360B (en) Laminated nonwoven fabric
CN110573671B (en) Absorbent article
CN109312530B (en) Non-woven fabric
CN108368673B (en) Non-woven fabric
CN109196163B (en) Long fiber nonwoven fabric
CN109311286B (en) Absorbent article
CN109196162B (en) Non-woven fabric
CN110461290B (en) Absorbent article
JP6996875B2 (en) Non-woven fabric
JP6366640B2 (en) Non-woven
CN109219679B (en) Non-woven fabric
JP6329991B2 (en) Absorbent articles
JP6744134B2 (en) Absorbent article

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant