Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F13/00—Bandages or dressings; Absorbent pads
  • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
  • A61F13/51—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
• • 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
  • D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
  • D06M13/188—Monocarboxylic acids; Anhydrides, halides or 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
  • D06M13/10—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
  • D06M13/224—Esters of carboxylic acids; Esters of carbonic acid
• • 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
• • 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

Definitions

• the present invention is a fiber treatment agent for water-absorbent articles that can have initial and repeated water permeability while the pH of the surface material of water-absorbent articles such as disposable diapers and sanitary napkins is weakly acidic, and
• the present invention relates to a fiber treatment agent for a water-absorbent article that is difficult to flow down by water such as urine and sweat and can maintain the pH of the surface material to be weakly acidic.
• Diaper rash In general, dermatitis and diaper rash frequently occur when using absorbent articles such as paper diapers and sanitary products. Diaper rash is caused by the fact that ureolytic enzyme bacteria degrade urea and produce ammonia, resulting in the skin pH leaning to the alkaline side. Therefore, water-absorbing articles such as disposable diapers and sanitary products make the top sheet, etc., which touches the skin weakly acidic, thereby relaxing the pH of the skin toward the alkaline side and improving diaper rash. Therefore, the weak acidification of the top sheet that directly touches the skin has been studied.
• Patent Literature 1 describes that a top sheet is provided with a water-permeable agent and citric acid or sodium citrate as a pH adjuster.
• citric acid used as a pH adjuster is soluble in water, there is a concern that citric acid adhering to the top sheet may flow down due to moisture due to repeated excretion of urine and the like. Further, depending on the amount of excretion, the pH of the surface layer of the absorbent article may increase.
• Patent Document 2 in order to obtain a weakly acidic sheet, a base paper such as tissue paper or non-woven fabric is loaded with an agent having a pH of 5.0 to 6.0 (containing citric acid as a pH adjusting agent). A method is described. However, since the compatibility of the surfactant used to obtain water permeability and citric acid does not match, coagulation separation occurs when the surfactant contains citric acid, and both weak acidity and water permeability Non-woven fabric with properties is not made.
• the present invention relates to a fatty acid (A) containing 45 to 95% by weight of oleic acid derived from natural fats and oils, a polyoxyalkylene adduct (B) of natural fats and oils, and a fatty acid ester of a polyoxyalkylene adduct of natural fats and oils.
• a fiber treatment agent for a water-absorbent article that can have initial and repeated water permeability while the pH of the surface material of the water-absorbent article such as a disposable diaper and sanitary napkin is weakly acidic. It is possible to provide a treatment agent that is difficult to flow down by water such as urine and sweat. For this reason, it is particularly suitable as a fiber treatment agent for obtaining surface materials of sanitary materials such as paper diapers and sanitary napkins.
• the fiber treatment agent for water-absorbent articles of the present invention comprises a fatty acid (A) containing 45 to 95% by weight of oleic acid derived from natural fats and oils and a polyoxyalkylene adduct of natural fats and oils from the viewpoint of showing weak acidity even after water permeation.
• A fatty acid
• a fiber treatment agent for water-absorbent articles comprising (B) and a fatty acid ester (C) of a polyoxyalkylene adduct of natural fats and oils, based on the total weight of (A), (B) and (C)
• the pH of the aqueous solution diluted with water so that the content of the fatty acid (A) is 0.3 to 3.0% by weight and the total weight of (A), (B) and (C) is 1% by weight. Is 4.5 to 6.5.
• the pH of the nonwoven fabric using the fibers to which the fiber treatment agent for water-absorbent articles is attached is greater than 6.5.
• fatty acid (A) containing 45 to 95% by weight of oleic acid derived from natural fats and oils include, for example, plant-derived fatty acids such as palm oil fatty acid, olive oil fatty acid, rice bran oil fatty acid, rice germ oil fatty acid, and rapeseed oil fatty acid. Among them, those containing 45 to 95% by weight of oleic acid can be mentioned. Among these, palm oil fatty acid and rice germ oil fatty acid are desirable.
• Fatty acids derived from natural fats and oils are generally saturated fatty acids having 8, 10, 12, 14, 16, 18, 20, 22, 24 and / or unsaturated fatty acids having 16, 18, 20, 22 carbon atoms. It is a mixture. It should be noted that fatty acids derived from natural fats and oils, especially fatty acids derived from vegetable fats and oils, have a track record of being used as cosmetics and human body cleaning agents that are directly applied to human skin. Will give consumers a sense of security.
• the fatty acid (A) derived from natural fats and oils used in the present invention needs to contain 45 to 95% by weight of oleic acid from the viewpoint of maintaining adsorptivity to fibers and hypoallergenic to the skin, and is 60 to 95% by weight. %, Preferably 80 to 95% by weight.
• the polyoxyalkylene adduct (B) of natural fat used in the present invention is preferably derived from vegetable fat. That the polyoxyalkylene adduct (B) of natural fats and oils is derived from vegetable fats and oils means that some of the components that constitute the polyoxyalkylene adducts (B) of natural fats and oils are derived from vegetable fats and oils. Typically, a compound in which the natural fat / oil is a vegetable fat / oil is included. That is, the polyoxyalkylene adduct (B) of natural fats and oils derived from vegetable fats and oils includes compounds obtained by artificially adding oxyalkylene groups to vegetable fats and oils.
• the polyoxyalkylene adduct (B) of natural fats and oils is preferably derived from castor oil.
• castor oil EO 10 mol adduct, castor oil EO 20 mol adduct, castor oil EO 25 mol adduct, castor oil EO 45 mol adduct and the like are preferable.
• EO means ethylene oxide.
• the fatty acid ester (C) of the polyoxyalkylene adduct of natural fat used in the present invention is preferably derived from vegetable fat.
• the fatty acid ester (C) of the polyoxyalkylene adduct of natural fats and oils is derived from vegetable oils and fats.
• Some of the components constituting the fatty acid ester (C) of the polyoxyalkylene adducts of natural fats and oils are derived from vegetable fats and oils. Means that.
• a compound in which the natural fat / oil is a vegetable fat / oil is included.
• the fatty acid ester (C) of the polyoxyalkylene adduct of natural oils and fats derived from vegetable oils and fats includes compounds obtained by artificially adding oxyalkylene groups to vegetable oils and further esterifying them.
• the fatty acid ester (C) of the polyoxyalkylene adduct of natural fats and oils is preferably derived from castor oil.
• trilauric acid ester of castor oil EO 10 mol adduct, dioleic acid ester of castor oil EO 20 mol adduct, dioleic acid ester of castor oil EO 25 mol adduct, EO 45 mol adduct of castor oil Tristearic acid ester of the product is preferable.
• the content of the fatty acid (A) is 0.3 to 3.0% by weight based on the total weight of (A), (B) and (C), preferably from the viewpoint of improving emulsion stability and initial hydrophilicity, Is 0.6 to 2.6% by weight.
• the content of the fatty acid (A) is less than 0.3% by weight, the pH when diluted with water so that the total weight of (A), (B) and (C) is 1% by weight is 6. Greater than 5.
• it exceeds 3.0% by weight the initial hydrophilicity is deteriorated.
• the fiber treatment agent (D) for water-absorbent articles of the present invention further contains a natural fat (E).
• E natural fat
• the slipperiness of fibers and the adsorptivity to fibers can be dramatically improved. Therefore, physical irritation to the skin can be suppressed.
• the emulsifiability becomes poor.
• natural fats and oils (E) to be contained for this purpose include, for example, animal-derived fats and oils such as beef tallow and pork fat, plant-derived fats and oils such as palm oil, olive oil, rice bran oil, rice germ oil and rapeseed oil Natural fats and oils are preferably used. Among these, vegetable oils and fats are preferable, and palm oil, rice bran oil, and rice germ oil are preferable. Natural fats and oils, especially vegetable oils and fats, have a track record of being used as cosmetics and body cleaning agents that are applied directly to human skin, and explaining that they are used gives consumers a sense of security It will be. In particular, palm oil is used as a raw material for detergents and foods, and rice bran oil and rice germ oil are preferably used because they have a long track record of being used as bathing agents.
• animal-derived fats and oils such as beef tallow and pork fat
• plant-derived fats and oils such as palm oil, olive oil, rice bran oil, rice germ oil and rapes
• the fiber treatment agent for water absorbent articles (D) of the present invention may contain a surfactant (F) as necessary.
• the surfactant (F) does not include the polyoxyalkylene adduct (B) of natural fats and oils and the fatty acid ester (C) of the polyoxyalkylene adduct of natural fats and oils.
• Examples of the surfactant (F) include a nonionic surfactant (F1), an anionic surfactant (F2), and an amphoteric surfactant (F3).
• nonionic surfactant (F1) examples include alkylene oxide adducts of active hydrogen compounds such as alcohols, amines, and carboxylic acids, esterified products thereof, and esterified products of polyhydric alcohols. Specifically, EO 5 mol adduct of lauryl alcohol, EO 20 mol adduct of sorbitan monolaurate and the like can be mentioned.
• Examples of the anionic surfactant (F2) include alkyl sulfonates and alkyl phosphate esters.
• the alkyl group constituting the alkyl sulfonate preferably has 6 to 20 carbon atoms, more preferably 8 to 16 carbon atoms, and still more preferably 10 to 14 carbon atoms.
• the alkyl group may be linear or branched.
• Specific examples of the alkyl sulfonate include octyl sulfonate potassium salt, dodecyl sulfonate sodium salt, tetradecyl sulfonate sodium salt, hexadecyl sulfonate sodium salt and the like.
• alkyl phosphate ester salt phosphate ester potassium salt of octyl alcohol, phosphate ester potassium salt of isodecyl alcohol, phosphate ester potassium salt of dodecyl alcohol, phosphate ester sodium salt of EO2 mol adduct of octyl alcohol, Examples thereof include phosphoric acid ester sodium salt of EO 5 mol adduct of hexadecyl alcohol.
• amphoteric surfactant (F3) examples include carboxylate type amphoteric surfactants, sulfate ester type amphoteric surfactants, sulfonic acid type amphoteric surfactants, and phosphate ester type amphoteric surfactants.
• acid salt type amphoteric surfactants include amino acid type amphoteric surfactants and betaine type amphoteric surfactants.
• the fiber treatment agent for water absorbent articles (D) of the present invention may contain other additives (G) as necessary.
• the additive (G) include antifoaming agents, preservatives, and fragrances.
• the fiber treatment agent (D) for water-absorbent articles of the present invention is blended with other components such as (A), (B), (C), and (E), (F), (G), etc. Alternatively, it can be obtained by heating (for example, 30 to 70 ° C.) if necessary and mixing uniformly.
• the blending order and blending method of each component are not particularly limited. Moreover, you may mix
• the fiber treatment agent (D) for water-absorbing articles of the present invention is a mixture of (A), (B) and (C), and is attached to the fiber or the like with components (E) added thereto. Alternatively, after diluting with water, it may be attached to fibers or the like in the form of an aqueous emulsion.
• the fiber treatment agent (D) for water-absorbent articles of the present invention can be used for fiber applications.
• This fiber is preferably a nonwoven fabric product, particularly a nonwoven fabric product used for top sheets such as paper diapers and synthetic napkins.
• the fibers By attaching the fiber treatment agent for water-absorbent articles (D) of the present invention to the fibers, the fibers can be provided with durable water permeability and used as the fibers of the present invention.
• a commonly used method such as an oiling roll method, a dipping method, or a spray method can be used in any step such as spinning and drawing. it can.
• the adhesion amount of the fiber treatment agent (D) for water-absorbent articles is preferably 0.05 to 5% by weight, more preferably 0.1 to 2% by weight, based on the fiber weight, as a solid content.
• the fiber used in the present invention means a hydrophobic fiber having a temperature of 25 ° C., a relative humidity of 65% and a water absorption of 1% by weight or less.
• the kind of fiber is not particularly limited, and a commonly used hydrophobic synthetic fiber can be used, and examples thereof include polyolefin, polyester, and polyamide.
• polystyrene resin examples include polyethylene, polypropylene, ethylene vinyl acetate copolymer, ethylene / propylene copolymer, and ethylene / propylene / 1-butene copolymer.
• polyester examples include polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene terephthalate / isophthalate, and polyether polyester.
• polyamide include 6,6-nylon and 6-nylon. Among these, polyolefin and polyester are preferably used as a water-absorbing material for diapers.
• the fiber form using the fiber to which the fiber treatment agent for water-absorbent articles (D) of the present invention is attached is preferably cloth-like, and examples thereof include woven fabrics, knitted fabrics, and nonwoven fabrics. Moreover, you may use the fiber mixed by methods, such as blended cotton, blended yarn, blended fiber, knit, and knit, as a cloth form. Among these, a nonwoven fabric is particularly preferable.
• the short fiber to which the fiber treatment agent for water-absorbent articles (D) of the present invention is adhered is made into a fiber laminate by a dry or wet method, and then crimped by a heating roll or melted by air heating.
• the fiber treatment agent (D) for a water-absorbent article of the present invention is attached to a nonwoven fabric obtained by a spunbond method, a melt blown method, a flash spinning method or the like. You may let them.
• the fiber of the present invention and the nonwoven fabric using the fiber are suitably used as a surface material for water-absorbing articles, particularly a surface material for sanitary materials such as paper diapers and sanitary napkins. Moreover, it can also utilize for a second sheet
• Example 1 1.5 parts by weight of fatty acid (A-1) having an oleic acid content of 65% by weight, 60.0 parts by weight of castor oil EO 25 mol adduct (B-1), dioleic acid ester of castor oil EO 25 mol adduct (C- 1) 10.0 parts by weight, dioleic acid ester (C-2) 24.0 parts by weight of EO 20 mol adduct of castor oil, and 4.5 parts by weight of rapeseed oil (E-1) are placed in a beaker at 40 ° C. for 30 minutes. By stirring, the fiber treatment agent (D-1) for water-absorbent articles of the present invention was obtained.
• Examples 2 to 4 and Comparative Examples 1 to 4 Each component was blended in the same manner as in Example 1 with the formulation shown in Table 1, and the fiber treatment agents (D-2) to (D-4) for water-absorbent articles of Examples 2 to 4 and Comparative Examples 1 to No. 4 fiber treatment agents (D′-1) to (D′-4) for water-absorbent articles were obtained.
• A-1 Fatty acid having a oleic acid content of 65% by weight (trade name “NAA-38S” (manufactured by NOF))
• A-2) Fatty acid having a oleic acid content of 47% by weight (trade name “PM-200” (made by Miyoshi Oil & Fats))
• A′-1 Fatty acid having a oleic acid content of 14% by weight (trade name “PALMAC505” (manufactured by ACIDCHEM INTERNIONAL SDN.
• BHD Citric acid (made by Iwata Chemical)
• B-1 Castor oil EO25 mol adduct (trade name “Brownon BR-425” (Aoki Yushi))
• B-2) Castor oil EO 20 mol adduct (trade name “Brownon BR-420” (Aoki Yushi))
• C-1 Dioleic acid ester of castor oil EO 25 mol adduct
• C-2) Dioleic acid ester of castor oil EO 20 mol adduct
• E-1 Rapeseed oil (trade name “rapeseed white squeezed oil” (day Made by Kiyo Oilio))
• E-2) Rice germ oil (trade name “PRO-15” (manufactured by Tsukino Food Industry))
• the resulting fiber treatment agent for water-absorbent articles is diluted with ion-exchanged water so that the concentration of the total amount of (A), (B) and (C) is 0.5% by weight. A water dilution of the agent was obtained.
• Disposable non-woven fabric (attachment amount 0.5% by weight, size: 10 cm ⁇ 10 cm) coated with disposable paper waste (“Kim Towel”, manufactured by Nippon Crecia Co., Ltd.) and coated with a fiber treatment agent for water absorbent articles ).
• a ring made of SUS (inner diameter 6 cm, height 6 cm) was placed on the treated nonwoven fabric, 50 ml of ion exchange water was passed through it, and then the treated nonwoven fabric was dried at 40 ° C. for 8 hours. 100 sheets of this treated nonwoven fabric were produced.
• ⁇ Liquid permeability> A test nonwoven fabric (10 cm ⁇ 10 cm) is placed on a filter paper (manufactured by ADVANTEC, No. 424 (10 cm ⁇ 10 cm)). (2) Further, place a cylindrical liquid passing plate (inner diameter: 3.3 cm) on the top, let 5 ml of physiological saline (NaCl solution) flow, and measure the passage time. The shorter the liquid passage time, the faster the liquid passage speed and the better the liquid permeability. (3) Second and subsequent measurements: The above method is performed twice at 1 minute intervals, and the liquid passing time is measured. This operation was performed up to the fifth time. (4) Under these evaluation conditions, generally, 12.5 seconds or less at the first time and 14.0 seconds or less at the third time are preferable.
• ⁇ Liquid return prevention> A treated nonwoven fabric (10 cm ⁇ 10 cm) is placed on a commercially available paper diaper, and a SUS ring (inner diameter 6 cm, height 6 cm) is further placed thereon, through which 100 ml of physiological saline is passed through the paper diaper. To absorb. (2) When all the physiological saline is absorbed in the paper diaper, remove the SUS ring and stack 20 sheets of pre-weighed filter paper (Toyo filter paper, No. 5, 10 cm ⁇ 10 cm), with a 5 kg weight (bottom) The area is 10 ⁇ 10 cm). (3) After standing for 5 minutes, weigh the filter paper and measure the increase in weight to obtain the liquid return amount (g). (4) In general, under this evaluation condition, the liquid return amount is preferably 1.2 g or less, and more preferably 1.0 g or less.
• Comparative Example 2 using citric acid (A′-2) which is not derived from natural fats and oils, the pH of the components recovered from the non-woven fabric was high as in Comparative Example 1.
• Comparative Example 3 in which the content of the fatty acid (A) based on the total weight of (A), (B) and (C) is less than 0.3% by weight, the pH at the stage of 1% by weight aqueous solution is 6.8, Out of the range of 4.5 to 6.5. Since the pH is not a weakly acidic region, there is a concern about skin irritation.
• the fiber treated with the fiber treatment agent for water-absorbent articles of the present invention and the nonwoven fabric using the same are suitably used as surface materials for water-absorbent articles, particularly sanitary materials such as paper diapers and sanitary napkins. . Moreover, it can also utilize for a second sheet

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• Health & Medical Sciences (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Veterinary Medicine (AREA)
• Public Health (AREA)
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• Chemical & Material Sciences (AREA)
• Animal Behavior & Ethology (AREA)
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• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Vascular Medicine (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Absorbent Articles And Supports Therefor (AREA)

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Citations (7)

• 2016
  • 2016-08-30 JP JP2016167801A patent/JP6687484B2/ja active Active
• 2017
  • 2017-08-10 WO PCT/JP2017/029042 patent/WO2018043087A1/ja active Application Filing
  • 2017-08-10 CN CN201780051540.4A patent/CN109642387B/zh active Active

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