WO2023149286A1 - 不織布用加工剤、及びこれを含有する不織布 - Google Patents
不織布用加工剤、及びこれを含有する不織布 Download PDFInfo
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- WO2023149286A1 WO2023149286A1 PCT/JP2023/002131 JP2023002131W WO2023149286A1 WO 2023149286 A1 WO2023149286 A1 WO 2023149286A1 JP 2023002131 W JP2023002131 W JP 2023002131W WO 2023149286 A1 WO2023149286 A1 WO 2023149286A1
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- 235000019329 dioctyl sodium sulphosuccinate Nutrition 0.000 description 1
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Classifications
-
- 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
- D06M13/10—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
- 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
- D06M13/248—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 sulfur
- D06M13/256—Sulfonated compounds esters thereof, e.g. sultones
-
- 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
- D06M13/248—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 sulfur
- D06M13/262—Sulfated compounds thiosulfates
-
- 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
- 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
Definitions
- the present invention relates to a nonwoven fabric processing agent and a nonwoven fabric containing the same.
- Patent Document 1 proposes a nonwoven fabric to which a specific processing agent is added.
- the processing agent described in Patent Document 1 still does not provide sufficient repeated water permeability, and the processing agent settles over time in a treatment bath using an aqueous solvent as a diluent solvent, causing the coating to start and the coating to begin.
- the adhesion rate of the processing agent was different just before the end.
- the problem to be solved by the present invention is to provide a nonwoven fabric having excellent repeated water permeability, and a nonwoven fabric processing agent that has a small change in adhesion rate during continuous coating, and It is to provide a nonwoven fabric containing this.
- R 1 and R 3 are each independently a hydrogen atom, an alkyl group having 1 to 24 carbon atoms, an alkenyl group having 2 to 24 carbon atoms, an alkanoyl group having 2 to 24 carbon atoms, or an alkanoyl group having 2 to 24 carbon atoms. or —C(O)—R 4 —COOX (wherein R 4 is an alkylene group having 1 to 12 carbon atoms, an alkenylene group having 2 to 12 carbon atoms or an arylene group having 6 to 12 carbon atoms.
- the compound A has the following general formula 3: ⁇ wherein R 1 is an alkyl group having 1 to 24 carbon atoms, an alkenyl group having 2 to 24 carbon atoms, an alkanoyl group having 2 to 24 carbon atoms, an alkenoyl group having 2 to 24 carbon atoms, or -C(O)-R 4 -COOX, wherein R4 is an alkylene group having 1 to 12 carbon atoms, an alkenylene group having 2 to 12 carbon atoms or an arylene group having 6 to 12 carbon atoms, and X is a hydrogen atom or an anion.
- R 2 is an alkylene group having 1 to 12 carbon atoms, an alkenylene group having 2 to 12 carbon atoms, or an arylene group having 6 to 12 carbon atoms, and A 1 and A 2 each independently have a carbon number It is an alkylene group of 2 to 4, l is 0 or an integer of 1 to 1000, m is an integer of 1 to 1000, and n is 0 or an integer of 1 to 100. However, l+n is 1 or more, and A 1 or A 2 contains an alkylene group having 3 or 4 carbon atoms. ⁇ , relative to the total mass of the compound A, the nonwoven fabric processing agent according to any one of the above [1] to [3].
- the nonwoven fabric processing agent according to any one of [1] to [6], which is 97% by mass or more of the total. [8] The above [1] to [7], wherein the anionic surfactant B is at least one selected from the group consisting of sulfonates, sulfates, carboxylates, and phosphates. 3. The processing agent for nonwoven fabric according to any one of .
- the anionic surfactant B is at least one selected from the group consisting of sulfonates, sulfates, carboxylates, and phosphates, and has the following general formula 2: R 5 —COOH General formula 2 ⁇ In the formula, R 5 is an alkyl group having 7 to 21 carbon atoms or an alkenyl group having 7 to 21 carbon atoms. ⁇ , and the content of the compound C is 0.02% by mass to 5% by mass with respect to the total mass of the compound A and the compound C, [1] to The nonwoven fabric processing agent according to any one of [8]. [10] A nonwoven fabric containing the nonwoven fabric processing agent according to any one of [1] to [9].
- the nonwoven fabric processing agent according to the present invention can repeatedly provide a nonwoven fabric having excellent water permeability, and the change in adhesion rate during continuous coating is small. Moreover, the nonwoven fabric according to the present invention is excellent in repeated water permeability, and the processing agent is evenly adhered over the length direction.
- the processing agent for nonwoven fabrics according to the present invention has a well-balanced ability to uniformly disperse in an aqueous solvent (dilution spreadability or water solubility) and affinity for nonwoven fabrics, so that such effects can be exhibited. it is conceivable that.
- the water-based solvent refers to water or a mixed solvent of water and an organic solvent that dissolves in water.
- R 1 and R 3 are each independently a hydrogen atom, an alkyl group having 1 to 24 carbon atoms, an alkenyl group having 2 to 24 carbon atoms, an alkanoyl group having 2 to 24 carbon atoms, or an alkanoyl group having 2 to 24 carbon atoms. or —C(O)—R 4 —COOX (wherein R 4 is an alkylene group having 1 to 12 carbon atoms, an alkenylene group having 2 to 12 carbon atoms or an arylene group having 6 to 12 carbon atoms.
- the processing agent of this embodiment contains the compound A (hereinafter also referred to as component A).
- either one of R 1 and R 3 is an alkyl group having 1 to 24 carbon atoms, an alkenyl group having 2 to 24 carbon atoms, an alkanoyl group having 2 to 24 carbon atoms, or 2 to 2 carbon atoms.
- 24 alkenoyl groups are preferred.
- the number of carbon atoms in the alkyl group, alkenyl group, alkanoyl group and alkenoyl group is more preferably 8-22, more preferably 12-18.
- These alkyl groups, alkenyl groups, alkanoyl groups and alkenoyl groups may be linear or branched.
- a 1 and A 2 are preferably C 2-3 alkylene groups from the viewpoint of repeated water permeability and dilution development.
- the polyalkyleneoxy group represented by (A 1 O) l and (A 2 O) m is a combination of an alkyleneoxy group having 2 carbon atoms (ethyleneoxy group) and an alkyleneoxy group having 3 carbon atoms (propyleneoxy group). It is preferred to include both.
- the polyalkyleneoxy groups represented by (A 1 O)l and (A 2 O)m consist of a plurality of alkyleneoxy groups, they may be block adducts or random adducts.
- l and m represent the degree of polymerization of the polyalkyleneoxy groups represented by (A 1 O)l and (A 2 O)m, respectively, l represents 0 or an integer of 1 to 1000, m is 1 It represents an integer of up to 1000, but both l and m are preferably 10 to 200 from the viewpoints of rewetting property (fewer permeated excrement and the like returning to the surface of the nonwoven fabric) and repeated water permeability.
- the viscosity of component A is preferably 100 to 3000 mPa ⁇ s, more preferably 200 to 2000 mPa ⁇ s, still more preferably 300 to 1000 mPa ⁇ s at 25°C.
- the processing agent is less likely to fall off from the fibers due to friction or the like after being applied to the nonwoven fabric. There is, and it is easy to coat evenly.
- Component A has the following general formula 3 from the viewpoint of repeated water permeability: ⁇ wherein R 1 is an alkyl group having 1 to 24 carbon atoms, an alkenyl group having 2 to 24 carbon atoms, an alkanoyl group having 2 to 24 carbon atoms, an alkenoyl group having 2 to 24 carbon atoms, or -C(O)-R 4 -COOX, wherein R4 is an alkylene group having 1 to 12 carbon atoms, an alkenylene group having 2 to 12 carbon atoms or an arylene group having 6 to 12 carbon atoms, and X is a hydrogen atom or an anion.
- R 2 is an alkylene group having 1 to 12 carbon atoms, an alkenylene group having 2 to 12 carbon atoms, or an arylene group having 6 to 12 carbon atoms, and A 1 and A 2 each independently have a carbon number It is an alkylene group of 2 to 4, l is 0 or an integer of 1 to 1000, m is an integer of 1 to 1000, and n is 0 or an integer of 1 to 100. However, l+n is 1 or more, and A 1 or A 2 contains an alkylene group having 3 or 4 carbon atoms.
- ⁇ is preferably contained in an amount of 20% by mass to 95% by mass, more preferably 25% by mass to 50% by mass, based on the total mass of the compound A.
- R 1 is preferably an alkyl group having 1 to 24 carbon atoms, an alkenyl group having 2 to 24 carbon atoms, an alkanoyl group having 2 to 24 carbon atoms, or an alkenoyl group having 2 to 24 carbon atoms.
- the number of carbon atoms in the alkyl group, alkenyl group, alkanoyl group and alkenoyl group is more preferably 8-22, more preferably 12-18.
- These alkyl groups, alkenyl groups, alkanoyl groups and alkenoyl groups may be linear or branched.
- a 1 and A 2 are each independently an alkylene group having 2 to 4 carbon atoms, but are preferably an alkylene group having 2 to 3 carbon atoms from the viewpoint of repeated water permeability and processing bath stability.
- the polyalkyleneoxy group represented by (A 1 O) l and (A 2 O) m is a combination of an alkyleneoxy group having 2 carbon atoms (ethyleneoxy group) and an alkyleneoxy group having 3 carbon atoms (propyleneoxy group). It is preferred to include both.
- the polyalkyleneoxy groups represented by (A 1 O)l and (A 2 O)m consist of a plurality of alkyleneoxy groups, they may be block adducts or random adducts.
- l and m represent the degree of polymerization of the polyalkyleneoxy groups represented by (A 1 O)l and (A 2 O)m, respectively, l represents 0 or an integer of 1 to 1000, m is 1 Although it represents an integer of up to 1000, both l and m are preferably 10 to 200 from the viewpoint of repeated water permeability.
- component A examples include esters of polyalkylene glycol (A1), polyoxyalkylene alkyl ethers (A2), esters thereof (A3), alkyleneoxy adducts of divalent carboxylic acids (A4), and esters thereof. compound (A5) and the like.
- the polyoxyalkylene alkyl ether (A2) can be synthesized, for example, by adding an alkylene oxide to a monohydric or dihydric alcohol.
- the reaction may be carried out at 80 to 200° C. according to a conventional method using a base catalyst such as potassium hydroxide or sodium hydroxide.
- monohydric alcohols include alcohols having 1 to 24 carbon atoms.
- Dihydric alcohols include, for example, ethylene glycol, propylene glycol, butylene glycol and the like. These alcohols may have branches or double bonds.
- alkylene oxide alkylene oxides having 2 to 4 carbon atoms such as ethylene oxide, propylene oxide and butylene oxide can be used. When two or more alkylene oxides are used, the method of addition may be block or random.
- the alkyleneoxy group adduct (A4) of divalent carboxylic acid can be obtained, for example, by adding alkylene oxide to divalent carboxylic acid or by reacting divalent carboxylic acid with polyalkylene glycol.
- Polyalkylene glycol can be obtained, for example, by adding an alkylene oxide to a dihydric alcohol.
- Esterified products of the compounds (A1, A3, A5) are, for example, the above polyalkylene glycol, polyoxyalkylene alkyl ether (A2), and / or alkyleneoxy group adduct of divalent carboxylic acid (A4),
- a monovalent and/or divalent carboxylic acid can be obtained by reacting at about 100 to 300° C. according to a conventional method. This reaction may be carried out without a catalyst, or with a catalyst such as sulfuric acid or p-toluenesulfonic acid.
- monovalent carboxylic acids include carboxylic acids having 1 to 24 carbon atoms. Such carboxylic acids may have branches or double bonds.
- divalent carboxylic acids examples include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid and phthalic acid, and aliphatic dicarboxylic acids such as 1,4-cyclohexanedicarboxylic acid, adipic acid, sebacic acid, maleic acid and succinic acid. can be mentioned.
- aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid and phthalic acid
- aliphatic dicarboxylic acids such as 1,4-cyclohexanedicarboxylic acid, adipic acid, sebacic acid, maleic acid and succinic acid.
- aliphatic dicarboxylic acids are preferably used, and adipic acid and succinic acid are more preferably used from the viewpoint of rewetting property and repeated water permeability.
- the processing agent of the present embodiment contains an anionic surfactant B (hereinafter also referred to as component B).
- Component B is preferably contained in an amount of 0.5% by mass to 30% by mass, more preferably 2% by mass to 20% by mass, based on the total of Component A and Component B.
- the anionic surfactant is not particularly limited, and known surfactants can be used. It is preferably at least one selected from the group consisting of ester salts.
- the salt-forming counterions may be K, Na, Li or primary to quaternary ammonium ions.
- anionic surfactants that are sulfonates include formalin condensates such as alkylbenzenesulfonates, alkylnaphthalenesulfonates, cresolsulfonates, naphthalenesulfonates, cresolsulfonates and naphthalenesulfonates, Sulfonate type anionic surfactants such as ⁇ -olefin sulfonates, paraffin sulfonates, sulfosuccinate salts, alkanoylmethyltaurine salts, and alkenoylmethyltaurine salts, among which sulfosuccinate salts are preferred. preferable.
- the sulfosuccinate ester salt has the following general formula (5): ⁇
- R 6 and R 7 may be the same or different, and each independently represents hydrogen, a linear or branched alkyl group having 2 to 22 carbon atoms, an alkenyl group, an aryl group, a polyoxy is an alkylenealkyl group, a polyoxyalkylenealkenyl group or a polyoxyalkylenearyl group and Y is a monovalent cation which may be K, Na or a primary to quaternary ammonium ion. However, either one of R 6 and R 7 is not hydrogen.
- R 6 and R 7 may be the same or different, and each independently represents hydrogen, a linear or branched alkyl group having 2 to 22 carbon atoms, an alkenyl group, an aryl group, a polyoxy is an alkylenealkyl group, a polyoxyalkylenealkenyl group or a polyoxyalkylenearyl group and Y is a monovalent cation which may be K, Na or a primary to quaternary ammonium ion. However, any one of R 6 and R 7 is not hydrogen. ⁇ .
- R 6 and R 7 are not hydrogen, they preferably have 2 to 22 carbon atoms, more preferably 6 to 10 carbon atoms.
- the number of carbon atoms is 2 or more, the water solubility of the nonwoven fabric processing agent is not too high, so that the nonwoven fabric to which it is added tends to be suppressed from falling off during repeated water permeation, and the repeated water permeability tends to improve. It is considered to be in On the other hand, when the number of carbon atoms is 22 or less, the non-woven fabric processing agent is not too soluble in water, so when diluted with a solvent such as water for coating on a non-woven fabric, the processing agent settles over time. It is thought that when coating a long nonwoven fabric, the deposition rate of the processing agent tends to be less likely to change between the start of coating and just before the end of coating.
- R 6 and R 7 contain a polyoxyalkylene group
- the polyoxyalkylene group is preferably an ethylene oxide group.
- At least one of R 6 and R 7 is particularly preferably a 2-ethylhexyl group from the viewpoint of better water permeability.
- anionic surfactants that are sulfate ester salts include higher alcohol (for example, alcohols having 8 to 22 carbon atoms) sulfate ester salts, higher alcohol polyalkylene glycol ether sulfate ester salts, and styrenated alkylphenol alkylene oxide adduct sulfate ester salts.
- styrenated phenol alkylene oxide adduct sulfate ester salts benzylated phenol alkylene oxide adduct sulfate ester salts, sulfated oils, sulfated fatty acid esters, sulfated fatty acids, sulfated fatty acid esters, and sulfated olefins.
- higher alcohol polyalkylene glycol sulfates are preferred.
- carboxylate anionic surfactant examples include carboxylate anionic surfactants such as fatty acid soaps and polycarboxylate anionic surfactants. agents are preferred.
- the polycarboxylate-type anionic surfactant can be synthesized by a conventionally known radical polymerization method using, for example, acrylic acid, methacrylic acid, maleic acid, etc. as monomers, and commercially available ones can be used. You may
- the method for producing the polycarboxylate-type anionic surfactant is not particularly limited, but for example, a radical polymerization initiator is added to an aqueous solution of the monomer and/or a salt thereof, and the mixture is heated at 30 to 150° C. for 2 to 5 hours. For example, a heat reaction method can be used.
- alcohols such as methanol, ethanol and isopropyl alcohol, and aqueous solvents such as acetone may be added to the aqueous solution of the monomer and/or salt thereof.
- the radical polymerization initiator to be used is also not particularly limited. Hydrogen, water-soluble azo polymerization initiators and the like can be mentioned, and these radical polymerization initiators may be used alone or in combination of two or more.
- a chain transfer agent eg, octyl thioglycolate
- a copolymerizable monomer may be used in addition to the above monomers.
- the copolymerizable monomer is not particularly limited, and includes vinyl monomers such as ethylene, vinyl chloride and vinyl acetate, acrylamide, acrylates, methacrylates and the like.
- Acrylates and methacrylates are not particularly limited, but those having a hydrocarbon group of 1 to 3 carbon atoms are preferred, and this hydrocarbon group may have a substituent such as a hydroxyl group.
- Such acrylates or methacrylates include methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, propyl acrylate, propyl methacrylate, and the like. These copolymerizable monomers may be used singly or in combination of two or more. At least part of the carboxyl groups in the polycarboxylic acid-based polymer is neutralized with an alkali metal, an amine-based compound, or the like.
- Alkali metals include sodium, potassium, and lithium
- amine compounds include ammonia, monoethanolamine, diethanolamine, and triethanolamine.
- anionic surfactants that are phosphate ester salts include higher alcohol phosphate ester salts, styrenated alkylphenol alkylene oxide adduct phosphate ester salts, styrenated phenol alkylene oxide adduct phosphate ester salts, benzylated phenol alkylene Phosphate salts of oxide adducts and the like can be mentioned, and among them, higher alcohol phosphate salts are preferable.
- the processing agent of this embodiment has the following general formula 2: R 5 —COOH General formula 2 ⁇
- R 5 is an alkyl group having 7 to 21 carbon atoms or an alkenyl group having 7 to 21 carbon atoms. ⁇ (hereinafter also referred to as component C).
- the number of carbon atoms in R 5 is preferably 9 to 19, more preferably 11 to 17, from the viewpoint of repeated water permeability.
- component C examples include caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid, pentadecyl acid, palmitic acid, paluitoleic acid, margaric acid, stearic acid, oleic acid, vaccenic acid, linoleic acid, eicosanoic acid, behenic acid and the like.
- the content of component C is preferably 0.02 to 5% by mass, more preferably 0.02 to 3% by mass, and more preferably 0.5 to 2% by mass with respect to the total mass of component A and component C. Most preferred. If it is 0.02% by mass or more, the affinity of the processing agent to the nonwoven fabric increases, and sufficient repeated water permeability can be obtained, and if it is 5% by mass or less, the processing agent has sufficient hydrophilicity. Since the processing agent is uniformly dispersed when diluted with a solvent during processing, uneven adhesion of the processing agent is less likely to occur, and water permeability tends to increase repeatedly.
- the method of adding component C to the processing agent of the present embodiment includes a method of adding component C after synthesis of component A, a method of adding excessive component C when synthesizing component A, and a method of adding excessive component C when synthesizing component A.
- the processing agent of this embodiment has the following general formula 4: HO—(A 3 O)p—H General formula 4 ⁇
- a 3 is an alkylene group having 2 to 4 carbon atoms
- p is an integer of 1 to 3.
- ⁇ (hereinafter also referred to as component D) may be included, From the viewpoint of repeated water permeability, the content of component D is preferably 1.0% by mass or less, preferably as low as possible, and most preferably 0% by mass, relative to compound A.
- the total weight of the dry residue after heat treatment at 105 ° C. for 3 hours of component A, component B, component C, component D, and component E is the total weight before heat treatment. On the other hand, it is preferably 97% by mass or more, more preferably 98% by mass, and still more preferably 99% by mass.
- the dry residue is obtained by heating an opened petri dish containing component A, component B, component C, component D, and component E with a hot air dryer or the like at 105 ° C. for 3 hours, and measuring the difference in mass before and after drying. It is expressed as a percentage divided by the previous mass. If it is 97% by mass or more, sufficient repeated water permeability can be obtained.
- the dry residue may be obtained, for example, by measuring the dry residue of each of component A, component B, component C, component D, and component E, and then totaling them.
- the dry residue of the agent may be measured.
- the nonwoven fabric to which the processing agent of the present embodiment is applied is post-processed, for example, to impart an uneven shape, the components of the processing agent are difficult to evaporate due to the heat during post-processing. Permeability is less likely to decrease.
- the processing agent of the present embodiment may further contain polyether-modified silicone (compound E) as component E that improves initial water permeability.
- compound E polyether-modified silicone
- the content ratio of Component E is preferably 5% by mass to 50% by mass, more preferably 10% by mass to 30% by mass, relative to Component A.
- the polyether-modified silicone preferably has a polyoxyalkylene skeleton in its main chain and/or side chains.
- the HLB of the polyether-modified silicone is preferably 5-15, more preferably 8-12.
- the water solubility of the nonwoven fabric processing agent containing such a polyether-modified silicone is sufficiently high, and the water permeability tends to be improved because the agent uniformly adheres to the nonwoven fabric.
- the HLB is 15 or less, the water solubility does not become too large, and the water permeability tends to be improved repeatedly.
- HLB hydrophilic-lipophilic balance
- Griffin's formula is the following formula: HLB is changed to (hydrophilic group ⁇ 20)/molecular weight.
- the hydrophilic group refers to an ethylene oxide group.
- Polyether-modified silicone may be used individually by 1 type, or may be used in combination of 2 or more type.
- the polyoxyalkylene skeleton of the polyether-modified silicone is not particularly limited, and examples thereof include a polyoxyethylene skeleton, a polyoxypropylene skeleton, a polyoxytrimethylene skeleton, a polyoxybutylene skeleton, and a polyoxytetramethylene skeleton.
- these skeletons include a single skeleton of one type of polyoxyalkylene, a mixed skeleton of two or more types of polyoxyalkylene (random), and a sequential skeleton (block). may be introduced into both ends of the silicone, the side chain or the main chain of the silicone.
- a polyoxyethylene skeleton, a mixed skeleton of a polyoxyethylene skeleton and a polyoxypropylene skeleton, and a mixed skeleton of a polyoxyethylene skeleton and a polyoxypropylene skeleton can be particularly preferably used because they repeatedly improve water permeability.
- a polyether-modified silicone for example, an alcohol having a double bond or a compound obtained by adding an alkylene oxide to an alcohol having a double bond is reacted with a silicone having an active hydrogen group such as methyl hydrogen silicone.
- Side chain polyoxyalkylene type methylhydrogensilicone and methylhydrogensilicone/polyoxyalkylene polymerized type of the obtained methylhydrogensilicone can be mentioned.
- Examples of alcohols having double bonds include monohydric or polyhydric alcohols having 2 to 6 carbon atoms. Polyhydric alcohols having 2 to 6 carbon atoms are preferred from the viewpoint of repeated water permeability.
- Examples of alkylene oxides used for addition of alkylene oxides to alcohols having double bonds include ethylene oxide, propylene oxide, trimethylene oxide, tetrahydrofuran, 1,2-butylene oxide, 2,3-butylene oxide, isobutylene oxide, and the like. can be mentioned.
- polyether-modified silicones can be used as these polyether-modified silicones.
- Shin-Etsu Chemical Co., Ltd. KF-305M, KF-351A, KF-352A, KF-353, KF-355A, KF-615A, KF-640, KF-642, KF-6204, KF-6011, KF -6012, KF-6013; Dow Corning Toray Co., Ltd., SH8700, SH8410, SH8400, L-7002, FZ-2104, FZ-77, L-7604; Momentive Performance Materials Japan LLC, TSF4440, TSF4441, TSF4452, SF1188A, SF1288, Silsoft840, Silsoft860, Silsoft870, Silsoft875, Silsoft880, Silsoft895, etc. can be used.
- the processing agent of this embodiment may contain other components depending on the purpose, as long as the desired effect is not impaired.
- various surfactants such as emulsifiers, softeners, smoothing agents, antistatic agents, and antifoaming agents can be appropriately contained.
- the deposition rate (pure deposition rate) of the pure content of the processing agent in the nonwoven fabric varies depending on the intended use, but ranges from 0.10% by mass to 1.0% by mass. A range of 50% by weight is preferred, more preferably 0.15% to 1.00% by weight. If it is 0.10% by mass or more, sufficient water permeability can be obtained, and if it is 1.00% by mass or less, the possibility of skin rash or eczema will tend to decrease in applications that come into contact with the skin. be.
- each constituent component components A to E and other components
- the concentration of the applied processing agent is preferably 0.05% by mass to 100% by mass. It is preferable to uniformly mix each component at a temperature equal to or higher than the melting point of each component.
- a method for applying the processing agent to the nonwoven fabric a known method such as an immersion method, a spray method, a coating method, or the like can be employed, and is not particularly limited. Further, after applying the processing agent, drying may be performed using drying means described later. In addition, a treatment such as a corona discharge treatment or a normal pressure plasma discharge treatment may be applied to the nonwoven fabric before applying the processing agent, if necessary.
- the amount of the processing agent solution applied is small.
- the amount (% by mass) of the processing agent solution applied to the nonwoven fabric is preferably 1.0% by mass to 65% by mass, more preferably 3.0% by mass to 60% by mass, and still more preferably 5.0% by mass to 50% by mass. If it is 1.0% by mass or more, uniform coating can be obtained.
- the method of applying the processing agent is generally by coating.
- Known coating methods include kiss coater, die, gravure coater, spray method and the like. It is preferable that the kiss coater uses a stainless steel applicator roll and the rotation speed and embrace angle of the kiss coater are adjusted to apply the nonwoven fabric processing agent.
- the handle of the gravure roll may be of a grid type or a pyramid type, but preferably of a slanted line type because the processing agent is less likely to remain on the bottom of the gravure cell.
- the cell volume is preferably 5 cm 3 /m 2 to 40 cm 3 /m 2 . If it is 5 cm 3 /m 2 or more, the coating amount is sufficiently large, and uniform coating of the processing agent is facilitated. On the other hand, if it is 40 cm 3 /m 2 or less, the coating amount is sufficiently small, so problems such as insufficient drying in the drying process and uneven adhesion of the processing agent due to migration are less likely to occur.
- the method for scraping off the liquid on the surface of the gravure roll may be a doctor blade method using a general hardened steel plate doctor or a rubber roll method using a roll with a rubber surface.
- the pressing pressure in the case of the doctor blade method is preferably 0.5 kg/cm to 1.0 kg/cm, more preferably 0.6 kg/cm to 0.8 kg/cm.
- the pressing pressure is preferably 1.0 kg/cm or more and 5.0 kg/cm or less, more preferably 1.5 kg/cm or more and 3.5 kg/cm or less, within the range of rubber hardness of 60° or more and 80° or less. preferable.
- the pressing pressure is within the above range, the nonwoven fabric is uniformly pressed in the width direction, so that the variation in the coating amount of the processing agent is reduced.
- a spraying method because it can handle high-speed equipment, can be applied efficiently, and can easily maintain the thickness of the nonwoven fabric.
- a known spraying method using air compression or a method of directly compressing and spraying the processing agent solution may be used, but the rotor dampening method is preferable from the viewpoint of uniform application to the nonwoven fabric.
- the rotor dampening method is a method in which the processing agent solution is supplied onto the rotating rotor and the processing agent solution is sprayed using the centrifugal force of the rotor rotation. is possible.
- a conventional drying method can be used for drying after applying the processing agent solution, and there is no particular limitation, and known methods using convective heat transfer, conductive heat transfer, radiant heat transfer, etc. can be used. , a hot air circulation type, a hot air penetration type, an infrared heater type, a method of blowing hot air on both sides of a nonwoven fabric, a method of introducing into a heated gas, and the like.
- the nonwoven fabric is preferably made of thermoplastic fibers, and may be a long fiber nonwoven fabric manufactured by a spunbond method or a short fiber nonwoven fabric manufactured by a carding method or a wet papermaking method.
- a long-fiber nonwoven fabric produced by a spunbond method is preferable.
- long fibers refer to fibers having a fiber length of 55 mm or more.
- thermoplastic fibers not only those having a round cross section, but also those having a special shape such as fibers having an irregular cross section such as a flat or Y-shaped cross section, hollow fibers, or crimped fibers can be used. It is not particularly limited.
- the web constituting the nonwoven fabric may be a single layer, but may be laminated by spraying the web (M) melt-spun by the meltblowing method on the web (S) formed by the spunbond method.
- the lamination state may be SS, SSS, and SSSS, or may be SM, SMS, SMMS, and SMSMS.
- each layer may be formed with a different basis weight, fiber diameter, and fiber shape.
- Laminated webs can be joined by bonding using adhesives, bonding with low-melting-point fibers or composite fibers, melting and bonding by sprinkling a hot-melt binder during web formation, and machine entangling with needle punches or water jets. Examples include entanglement, hot air bonding, and partial thermocompression bonding. From the viewpoint of high-speed productivity, joining by partial thermocompression bonding is preferable. Bonding by partial thermocompression bonding includes, for example, bonding by passing a web between heated embossing/flat rolls capable of imparting pinpoint-shaped, elliptical-shaped, diamond-shaped, rectangular-shaped bonding points, and the like.
- thermocompression bonding area ratio in partial thermocompression bonding is preferably 5 to 40%, more preferably 5 to 25%, from the viewpoint of strength retention and flexibility.
- hot air for bonding.
- a bonding method using hot air a hot air circulation type, a hot air penetration type, and a method of blowing hot air on both sides of the nonwoven fabric can be used.
- Thermoplastic fibers that make up the nonwoven fabric include, for example, polyolefin resins such as polyethylene, polypropylene, and copolymer polypropylene, polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, and copolymer polyester, nylon-6, Polyamide-based resins such as nylon-66 and copolymer nylon, and biodegradable resins such as polylactic acid, polybutylene succinate, and polyethylene succinate can be included.
- Polyolefin-based resins are preferable from the viewpoint of the texture of the nonwoven fabric and, in the case of disposable materials, from the viewpoints of versatility and convenience of collection.
- the thermoplastic fibers may contain only one type of resin, or may contain two or more types of resins such as side-by-side type fibers and sheath-core type fibers.
- the average fineness of the fibers of the nonwoven fabric is preferably 0.45dtex to 10.0dtex, more preferably 0.55dtex to 8.0dtex, still more preferably 0.86dtex to 5.0dtex. From the viewpoint of spinning stability, the average fineness is preferably 0.45 dtex or more, and on the other hand, in applications where texture is important, it is preferably 10.0 dtex or less.
- the basis weight of the nonwoven fabric is preferably 8 g/m 2 or more, more preferably 10 g/m 2 to 100 g/m 2 or less, still more preferably 10 g/m 2 to 80 g/m 2 . If the basis weight is 8 g/m 2 or more, it will be strong enough as a nonwoven fabric used for sanitary materials, for example.
- the repeated water permeability according to the test method described later is 60% or more in the sixth time. If the value of the sixth repeated water permeability is 60% or more, for example, when used as a top sheet or a second sheet of a disposable diaper, it is possible to sufficiently pass urine even after the third time, so urine leakage is prevented. can reduce the possibility.
- Tables 1 to 4 below show the content ratio of each component in the obtained processing agent.
- the evaluation methods for each property are as follows, and the physical properties of the obtained nonwoven fabrics are shown in Tables 5 to 8 below.
- the machine direction in the production of nonwoven fabric is called the MD direction
- the width direction perpendicular to that direction is called the CD direction.
- Average fineness The nonwoven fabric is divided into 5 equal parts in the CD direction, and 1 cm square test pieces are collected, and the fiber diameter is measured at 20 points each with a microscope VHX-700F manufactured by Keyence Corporation, and the average value and the density of the resin that constitutes the fiber. The average fineness was calculated from
- Fabric weight of nonwoven fabric (g/m 2 ) According to JIS-L1906: 2000, 5 test pieces of 20 cm in the MD direction ⁇ 5 cm in the CD direction are collected so that the collection positions are even in the CD direction of the nonwoven fabric, and the mass is measured, and the average value per unit area. It was calculated as a basis weight (g/m 2 ) in terms of mass.
- Deposition rate of pure processing agent in nonwoven fabric (% by mass) (pure deposition rate)
- the pure content adhesion rate was measured by a rapid extraction method using a quick residual fat extractor (OC-1 type) manufactured by Intec Co., Ltd., and was determined from the average value.
- the details of the measurement method are as follows. (1) A nonwoven fabric treated with a processing agent is sampled to 2 g ⁇ 0.5 g, and the mass i is measured. (2) Weigh the mass ii of the aluminum pan for receiving the extract and set it on the heater set at 150° C. of the extractor. (3) The sampled nonwoven fabric is filled in a metal cylinder. (4) Add 10 cc of methanol into a metal cylinder to wet the non-woven fabric.
- Retention rate of pure content deposition rate (%) (change in deposition rate during continuous coating)
- the thickness is the distance obtained by subtracting the paper tube radius from the nonwoven fabric roll radius. ), and the thickness of the outermost 10% of the nonwoven fabric roll is defined as the outer layer (outer layer).
- Component A-1 Polyoxyalkylene glycol was obtained by adding 29 mol of propylene oxide and then 10 mol of ethylene oxide to propylene glycol in accordance with a conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 1 mol of lauric acid to obtain component A-1.
- Component A-1 is represented by the general formula (3), wherein n is 0, R 1 is an alkanoyl group having 12 carbon atoms, and (A 1 O)l is 30 mol of propylene oxide at both ends of a total of 10 mol. It is a compound that is a group (1 is 40) to which ethylene oxide is added.
- Component A-2 Polyoxyalkylene glycol was obtained by adding 29 mol of propylene oxide and then 10 mol of ethylene oxide to propylene glycol according to the conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 2 mol of lauric acid to obtain component A-2.
- Component A-2 is represented by general formula (1) in which n is 0, R 1 and R 3 are alkanoyl groups having 12 carbon atoms, and (A 1 O)l is 30 mol of propylene oxide at both ends. It is a compound that is a group (1 is 40) to which 10 moles of ethylene oxide are added.
- Component A-3 Polyoxyalkylene glycol was obtained by adding 64 mol of propylene oxide and then 10 mol of ethylene oxide to propylene glycol according to the conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 1.5 mol of stearic acid to obtain component A-3.
- Component A-3 is represented by general formula (1), wherein n is 0, R 1 and R 3 are alkanoyl groups having 18 carbon atoms, and (A 1 O)l is a total of 65 mol of propylene oxide at both ends.
- Component A-4 Polyoxyalkylene glycol was obtained by adding 64 mol of propylene oxide and then 10 mol of ethylene oxide to propylene glycol according to the conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 1.5 mol of oleic acid to obtain Component A-4.
- Component A-4 is represented by general formula (1), wherein n is 0, R 1 and R 3 are alkenoyl groups having 18 carbon atoms, and (A 1 O)l is a total of 65 mol of propylene oxide at both ends.
- n 10 mol of ethylene oxide-added group (l is 75), and in general formula (3), n is 0, R 1 is an alkenoyl group having 18 carbon atoms, and (A 1 O)l is a group (l is 75) in which a total of 10 moles of ethylene oxide is added to both ends of 65 moles of propylene oxide.
- Component A-5 Polyoxyalkylene glycol was obtained by adding 64 mol of propylene oxide and then 10 mol of ethylene oxide to propylene glycol according to the conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 1.2 mol of oleic acid to obtain component A-5.
- Component A-5 is represented by general formula (1), wherein n is 0, R 1 and R 3 are alkenoyl groups having 18 carbon atoms, and (A 1 O)l is a total of 65 mol of propylene oxide at both ends.
- n 10 mol of ethylene oxide-added group (l is 75), and in general formula (3), n is 0, R 1 is an alkenoyl group having 18 carbon atoms, and (A 1 O)l is a group (l is 75) in which a total of 10 moles of ethylene oxide is added to both ends of 65 moles of propylene oxide.
- Component A-6 Polyoxyalkylene glycol was obtained by adding 64 mol of propylene oxide and then 10 mol of ethylene oxide to propylene glycol according to the conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 1.25 mol of behenic acid to obtain Component A-6.
- Component A-6 is represented by general formula (1) in which n is 0, R 1 and R 3 are alkanoyl groups having 22 carbon atoms, and (A 1 O)l is a total of 65 mol of propylene oxide at both ends.
- n 10 mol of ethylene oxide-added group (l is 75), and in general formula (3), n is 0, R 1 is an alkanoyl group having 22 carbon atoms, and (A 1 O)l is a group (l is 75) in which a total of 10 moles of ethylene oxide is added to both ends of 65 moles of propylene oxide, and is a 25:75 mixture.
- Component A-7 Polyoxyalkylene glycol was obtained by adding 64 mol of propylene oxide and then 10 mol of ethylene oxide to propylene glycol according to the conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 1.6 mol of oleic acid to obtain component A-7.
- Component A-7 is represented by the general formula (1), wherein n is 0, R 1 and R 3 are alkenoyl groups having 18 carbon atoms, and (A 1 O)l is a total of 65 mol of propylene oxide at both ends.
- n 10 mol of ethylene oxide-added group (l is 75), and in general formula (3), n is 0, R 1 is an alkenoyl group having 18 carbon atoms, and (A 1 O)l is a group (l is 75) in which a total of 10 moles of ethylene oxide is added to both ends of 65 moles of propylene oxide.
- Component A-8 Polyoxyalkylene glycol was obtained by adding 64 mol of propylene oxide and then 10 mol of ethylene oxide to propylene glycol according to the conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 1.7 mol of oleic acid to obtain Component A-8.
- Component A-8 is represented by general formula (1) in which n is 0, R 1 and R 3 are alkenoyl groups having 18 carbon atoms, and (A 1 O)l is a total of 65 mol of propylene oxide at both ends.
- n 10 mol of ethylene oxide-added group (l is 75), and in general formula (3), n is 0, R 1 is an alkenoyl group having 18 carbon atoms, and (A 1 O)l is a group (l is 75) in which a total of 10 moles of ethylene oxide is added to both ends of 65 moles of propylene oxide.
- Component A-9 Polyoxyalkylene glycol was obtained by adding 64 mol of propylene oxide and then 10 mol of ethylene oxide to propylene glycol according to the conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 1.8 mol of oleic acid to obtain Component A-9.
- Component A-9 is represented by general formula (1), wherein n is 0, R 1 and R 3 are alkenoyl groups having 18 carbon atoms, and (A 1 O)l is a total of 65 mol of propylene oxide at both ends.
- n 10 mol of ethylene oxide-added group (l is 75), and in general formula (3), n is 0, R 1 is an alkenoyl group having 18 carbon atoms, and (A 1 O)l is a group (l is 75) in which a total of 10 moles of ethylene oxide is added to both ends of 65 moles of propylene oxide.
- Component A-10 Polyoxyalkylene glycol was obtained by adding 64 mol of propylene oxide and then 10 mol of ethylene oxide to propylene glycol according to the conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 1.9 mol of caprylic acid to obtain Component A-10.
- Component A-10 is represented by the general formula (1), wherein n is 0, R 1 and R 3 are alkanoyl groups having 8 carbon atoms, and (A2O)l is 65 mol of propylene oxide and 10 mol in total at both ends.
- R 1 is an alkanoyl group having 8 carbon atoms
- (A 1 O)l is propylene and a compound which is a group (1 is 75) in which a total of 10 mol of ethylene oxide is added to both ends of 65 mol of oxide.
- Component A-11 Polyoxyalkylene glycol was obtained by adding 64 mol of propylene oxide and then 10 mol of ethylene oxide to propylene glycol according to the conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 1.95 mol of oleic acid to obtain Component A-11.
- Component A-11 is represented by general formula (1) in which n is 0, R 1 and R 3 are alkenoyl groups having 18 carbon atoms, and (A 1 O)l is 65 mol of propylene oxide at both ends.
- n 10 mol of ethylene oxide-added group (l is 75), and in general formula (3), n is 0, R 1 is an alkenoyl group having 18 carbon atoms, and (A 1 O)l is a group (l is 75) in which a total of 10 moles of ethylene oxide is added to both ends of 65 moles of propylene oxide, and is a 95:5 mixture.
- Component A-12 Polyoxyalkylene glycol was obtained by adding 16 mol of propylene oxide and then 3 mol of ethylene oxide to propylene glycol according to a conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 1.5 mol of oleic acid to obtain Component A-12.
- Component A-12 is represented by general formula (1), wherein n is 0, R 1 and R 3 are alkenoyl groups having 18 carbon atoms, and (A2O)l is 17 mol of propylene oxide at both ends and a total of 3 mol.
- R 1 is an alkenoyl group having 18 carbon atoms
- a 1 O)l is propylene and a compound which is a group (1 is 20) in which a total of 3 mols of ethylene oxide are added to both ends of 17 mols of oxide.
- Component A-13 Polyoxyalkylene glycol was obtained by adding 16 mol of propylene oxide and then 8 mol of ethylene oxide to propylene glycol according to a conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 1.5 mol of lauric acid to obtain Component A-13.
- Component A-13 is represented by general formula (1) in which n is 0, R 1 and R 3 are alkanoyl groups having 12 carbon atoms, and (A 2 O)l is 17 moles of propylene oxide at both ends.
- n 8 mol of ethylene oxide-added group (l is 25), and in general formula (3), n is 0, R 1 is an alkanoyl group having 12 carbon atoms, and (A 1 O)l is a group (l is 25) in which a total of 8 moles of ethylene oxide are added to both ends of 17 moles of propylene oxide.
- Component A-14 Polyoxyalkylene glycol was obtained by adding 79 mol of propylene oxide and then 20 mol of ethylene oxide to propylene glycol according to the conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 1.5 mol of oleic acid to obtain Component A-14.
- Component A-14 is represented by general formula (1), wherein n is 0, R 1 and R 3 are alkenoyl groups having 18 carbon atoms, and (A 1 O)l is 80 mol of propylene oxide at both ends.
- Component A-15 Polyoxyalkylene glycol was obtained by adding 99 mol of propylene oxide and then 40 mol of ethylene oxide to propylene glycol in accordance with a conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 1.5 mol of lauric acid to obtain component A-15.
- Component A-15 is represented by general formula (1), wherein n is 0, R 1 and R 3 are alkanoyl groups having 12 carbon atoms, and (A 1 O)l is a total of 100 moles of propylene oxide at both ends.
- n 40 mol of ethylene oxide-added group (l is 140), and in general formula (3), n is 0, R 1 is an alkanoyl group having 12 carbon atoms, and (A 1 O)l is a group (l is 140) in which a total of 40 moles of ethylene oxide is added to both ends of 100 moles of propylene oxide.
- Component A-16 Polyoxyalkylene glycol was obtained by adding 64 mol of propylene oxide and then 10 mol of ethylene oxide to propylene glycol according to the conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 1.5 mol of lauric acid to obtain component A-16.
- Component A-16 is represented by general formula (1) in which n is 0, R 1 and R 3 are alkanoyl groups having 12 carbon atoms, and (A 1 O)l is a total of 65 mol of propylene oxide at both ends.
- n 10 mol of ethylene oxide-added group (l is 75), and in general formula (3), n is 0, R 1 is an alkanoyl group having 12 carbon atoms, and (A 1 O)l is a group (l is 75) in which a total of 10 moles of ethylene oxide is added to both ends of 65 moles of propylene oxide.
- Component A-17 Polyoxyalkylene glycol was obtained by adding 29 mol of propylene oxide and then 26 mol of ethylene oxide to propylene glycol according to a conventional method. Then, 1 mol of this polyoxyalkylene glycol was reacted with 1.8 mol of lauric acid to obtain Component A-17.
- Component A-17 is represented by general formula (1), wherein n is 0, R 1 and R 3 are alkanoyl groups having 12 carbon atoms, and (A 1 O)l is 30 mol of propylene oxide at both ends.
- Component A-18 Propylene glycol was obtained by adding 34 mol of propylene oxide to propylene glycol according to a conventional method. Then, 1 mol of this polypropylene glycol was reacted with 2 mol of stearic acid to obtain component A-18.
- Component A-18 is represented by general formula (1) in which n is 0, R 1 and R 3 are alkanoyl groups having 18 carbon atoms, and (A 1 O)l is a group containing 35 moles of propylene oxide (l is 35).
- Component A-19 Polyoxyalkylene glycol was obtained by adding 29 mol of propylene oxide and then 10 mol of ethylene oxide to propylene glycol according to the conventional method. Then, 3 mol of this polyoxyalkylene glycol and 2 mol of adipic acid were reacted. Then, this reactant was reacted with 1 mol of lauric acid to obtain Component A-19.
- Component A-19 is represented by general formula (3), wherein R 1 is an alkanoyl group having 12 carbon atoms, and (A 1 O)l is a group obtained by adding a total of 10 mol of ethylene oxide to both ends of 30 mol of propylene oxide.
- R 2 is an alkylene group having 4 carbon atoms
- (A 2 O)m is a group obtained by adding a total of 10 mol of ethylene oxide to both ends of 30 mol of propylene oxide (m is 40). is a compound in which n is 2.
- Component A-20 Polyoxyalkylene glycol was obtained by adding 29 mol of propylene oxide and then 10 mol of ethylene oxide to propylene glycol according to the conventional method. Then, 3 mol of this polyoxyalkylene glycol and 2 mol of adipic acid were reacted. Then, this reactant was reacted with 1.5 mol of lauric acid to obtain Component A-20.
- Component A-20 is represented by general formula (1), wherein R 1 and R 3 are alkanoyl groups having 12 carbon atoms, (A 1 O)l is 30 mol of propylene oxide, and 10 mol of ethylene oxide is attached to both ends.
- R 1 is an alkanoyl group having 12 carbon atoms
- (A 1 O) l is 30 mol of propylene oxide at both ends of a total of 10 mol of ethylene oxide is added (l is 40)
- R 2 is an alkylene group having 4 carbon atoms
- Component A-21 Polyoxyalkylene glycol was obtained by adding 29 mol of propylene oxide and then 10 mol of ethylene oxide to propylene glycol according to the conventional method. Then, 3 mol of this polyoxyalkylene glycol and 4 mol of adipic acid were reacted to obtain Component A-21.
- Component A-21 is -C(O)-C 4 H 8 -COOH in which R 1 and R 3 are a butylene group and R 4 is a butylene group, and (A 1 O)l is propylene A group in which a total of 10 moles of ethylene oxide is added to both ends of 30 moles of oxide (l is 40), R 2 is an alkylene group having 4 carbon atoms, and (A 2 O)m is both ends of 30 moles of propylene oxide. It is a group (m is 40) to which a total of 10 mol of ethylene oxide is added to the terminal, and a compound in which n is 2.
- Component A-22 After adding 5 mol of ethylene oxide to lauryl alcohol, 30 mol of propylene oxide and 5 mol of ethylene oxide were sequentially added to obtain a polyoxyalkylene glycol lauryl ether. Then, 1 mol of this polyoxyalkylene glycol lauryl ether was reacted with 1 mol of lauric acid to obtain component A-22.
- Component A-22 has the general formula (1) wherein n is 0, R 1 is an alkyl group having 12 carbon atoms, R 3 is an alkanoyl group having 12 carbon atoms, and (A 1 O)l is It is a group (1 is 40) in which a total of 10 mol of ethylene oxide is added to both ends of 30 mol of propylene oxide.
- Component A-23 After 5 mol of ethylene oxide was added to stearyl alcohol, 30 mol of propylene oxide and 5 mol of ethylene oxide were sequentially added to obtain a polyoxyalkylene glycol stearyl ether. Then, 1 mol of this polyoxyalkylene glycol stearyl ether was reacted with 1 mol of stearic acid to obtain component A-23.
- n is 0, R 1 is an alkyl group having 18 carbon atoms, R 3 is an alkanoyl group having 18 carbon atoms, and (A 1 O)l is It is a group (1 is 40) in which a total of 10 mol of ethylene oxide is added to both ends of 30 mol of propylene oxide.
- Component A-24 Polyoxyalkylene glycol was obtained by adding 29 mol of propylene oxide and then 10 mol of ethylene oxide to propylene glycol in accordance with a conventional method. This is referred to as component A-24.
- Component A-25 Polyethylene glycol was obtained by adding 44 mol of ethylene oxide to ethylene glycol according to a conventional method. Then, 1 mol of this polyethylene glycol was reacted with 1.5 mol of stearic acid to obtain Component A-25.
- Component A-25 is represented by general formula (1) in which n is 0, R 1 and R 3 are alkanoyl groups having 18 carbon atoms, and (A 1 O)l is a group containing 45 moles of ethylene oxide (l is 45) and a compound represented by general formula (3) in which n is 0, R 1 is an alkanoyl group having 18 carbon atoms, and (A 1 O)l is a group containing 45 moles of ethylene oxide (l is 45). and a 1:1 mixture of
- Component B As component B, the following components B-1 to B-7 were used.
- Component B-1 Pelex OT-P manufactured by Kao Corporation was used as sodium dioctyl sulfosuccinate.
- Component B-2 Emal 20C manufactured by Kao Corporation was used as sodium polyoxyethylene lauryl ether sulfate.
- Component B-3 As sodium dodecylbenzenesulfonate, Neopelex G-25 manufactured by Kao Corporation was used.
- Component B-4 As sodium polycarboxylate, Ceropol PC-300 manufactured by Sanyo Kasei Co., Ltd. was used.
- Component B-5 A reagent manufactured by Tokyo Kasei Co., Ltd.
- Component C As component C, the following components C-1 to C-3 were used. [Component C-1] NAA-34 manufactured by NOF Corporation was used as oleic acid. [Component C-2] As the stearic acid, Sakura stearate powder manufactured by NOF Corporation was used. [Component C-3] NAA-122 manufactured by NOF Corporation was used as lauric acid.
- Component D As the component D, the following component D-1 was used. [Component D-1] Propylene glycol manufactured by ADEKA Corporation was used.
- component E As component E, the following components E-1 to E-4 were used.
- Example 1 Each component was heated at 30° C. so that component A-1 was 69.5% by mass, component B-1 was 5% by mass, component C-3 was 0.5% by mass, and component E-1 was 25% by mass. By mixing, the processing agent of Example 1 was obtained. The content ratio of each component is shown in Table 1 below.
- Examples 2 to 48, Comparative Examples 1 to 7 In the same manner as in Example 1, except that the mixing ratio of each component was changed so that the content ratio of component A, component B, component C, component D, and component E was as shown in Tables 1 to 4 below. , Examples 2 to 48, and Comparative Examples 1 to 7 were obtained. The content ratio of each component is shown in Tables 1 to 4 below.
- Nonwoven fabric 1 Polypropylene (PP) resin with a melt flow rate (MFR) of 55 g/10 minutes (measured at a temperature of 230 ° C and a load of 2.16 kg according to JIS-K7210) is spun so that the discharge amount is 0.88 g / minute ⁇ hole A filament group was extruded at a spinning temperature of 220° C. by a bond method, and the filament group was extruded toward a moving collecting surface using a high-speed air jet pulling device to prepare a filament web having an average fiber diameter of 1.5 dtex.
- MFR melt flow rate
- the obtained long fiber web is passed between a flat roll and an embossed roll (crimped area ratio of 6.3%) to partially compress the fibers to each other, and the line is adjusted so that the target basis weight is 13 g/m 2 .
- a nonwoven fabric 1 was obtained by adjusting the speed.
- Nonwoven fabric 2 An ethylene/propylene random copolymer resin (r-PP) having an ethylene component content of 4.3 mol% and an MFR of 24 was spun-bonded at a spinning temperature of 230 at a discharge rate of 0.84 g/min.hole. C., and this filament group was extruded toward a moving collecting surface using a high-speed pulling device with an air jet to produce a filament web having an average fiber diameter of 1.5 dtex. Next, the fibers of the obtained filament web were partially pressed against each other using the same flat roll/embossing roll as used in the production of the nonwoven fabric (1) so that the target basis weight was 13 g/m 2 . A nonwoven fabric 2 was obtained by adjusting the line speed.
- r-PP ethylene/propylene random copolymer resin
- the first component is a polypropylene (PP) resin with an MFR of 55 g/10 minutes (according to JIS-K7210, measured at a temperature of 230 ° C and a load of 2.16 kg), and an MI of 26 g/10 minutes (according to JIS-K7210, temperature (measured at 190 ° C.
- PP polypropylene
- the discharge amount of the first component is 0.4 g / min hole
- the discharge amount of the second component is 0.4 g /
- a fiber having a total discharge amount of 0.8 g/min.hole and a ratio of the first component to the second component of 1/1 is extruded by a spunbond method at a spinning temperature of 220 ° C., and this filament group is formed.
- An eccentric sheath-core type composite filament web having an average fiber diameter of 2.3 dtex was prepared by extruding toward a moving collection surface using a high-speed airflow drawing device with an air jet.
- the obtained eccentric sheath-core type composite long fiber nonwoven web was passed between a flat roll and an embossed roll (pressing area ratio 7.9%) to bond the fibers together, and was crimped with a basis weight of 20 g/m 2 .
- a nonwoven fabric 3 having a number of 17 pieces/inch was obtained.
- Nonwoven fabric 4 Using the same polymer as used in the production of the nonwoven fabric 3, the discharge amount of the first component (polypropylene) is 0.40 g/min hole, and the discharge amount of the second component (high density polyethylene) is 0.40 g/min.
- a fiber having a total discharge rate of 0.8 g/min.hole and a ratio of the first component to the second component of 1:1 was extruded by a spunbond method at a spinning temperature of 220°C.
- the extruded filaments are stretched in the pulling zone using the suction force of the moving collection surface, passed through a diffuser and deposited on the moving collection surface to form a side-by-side type composite continuous fiber web having an average fiber diameter of 3.0 dtex. was prepared.
- the obtained side-by-side type long-fiber nonwoven web was passed between a flat roll and an embossed roll (crimped area ratio of 7.9%) to bond the fibers together, and the basis weight was 20 g/m 2 and the number of crimps was 17/inch.
- a nonwoven fabric 4 was obtained.
- Nonwoven fabric 5 Using the same polymer as used in the production of the nonwoven fabric 3, the discharge amount of the first component (polypropylene) is 0.40 g/min hole, and the discharge amount of the second component (high density polyethylene) is 0.40 g/min.
- a fiber having a total discharge rate of 0.8 g/min.hole and a ratio of the first component to the second component of 1:1 was extruded by a spunbond method at a spinning temperature of 220°C.
- the extruded filaments are stretched in the pulling zone using the suction force of the moving collection surface, passed through a diffuser and deposited on the moving collection surface to form a side-by-side type composite continuous fiber web having an average fiber diameter of 3.0 dtex. was prepared.
- the fibers of the obtained side-by-side long-fiber nonwoven web were bonded with hot air at a hot air temperature of 142° C. and a hot air velocity of 0.7 m/s to obtain a nonwoven fabric 5 having a basis weight of 15 g/m 2 and a number of crimps of 15/inch. rice field.
- the first component is a polypropylene (PP) resin with an MFR of 36 g/10 minutes (according to JIS-K7210, measured at a temperature of 230 ° C and a load of 2.16 kg), and an MI of 17 g/10 minutes (according to JIS-K7210, temperature 190 ° C., a load of 2.16 kg) linear low density polyethylene (LLDPE) resin is used as the second component, the discharge amount of the first component is 0.40 g / min hole, the discharge amount of the second component is 0 A fiber having a total discharge rate of 0.80 g/min.hole at 40 g/min.hole and a ratio of the first component to the second component of 1/1 was extruded by a spunbond method at a spinning temperature of 220°C.
- PP polypropylene
- MI 17 g/10 minutes
- LLDPE linear low density polyethylene
- a group of filaments was extruded toward a moving collection surface using a high-speed airflow drawing device with an air jet to prepare a side-by-side type composite long-fiber web having an average fiber diameter of 2.8 dtex. Then, the fibers were bonded together with hot air having a hot air temperature of 120° C. and a hot air velocity of 1.0 m/s to obtain a nonwoven fabric 6 having a basis weight of 20 g/m 2 and a number of crimps of 25/inch.
- Nonwoven fabric 7 A polyethylene terephthalate (PET) resin with a solution viscosity of ⁇ sp/c of 0.75 is used as the first component, and MI is 26 g/10 min (according to JIS-K7210, measured at a temperature of 190 ° C. and a load of 2.16 kg). ) A resin is used as the second component, and the discharge amount of the first component is 0.50 g/min.hole, the discharge amount of the second component is 0.25 g/min.hole, and the total discharge amount is 0.75 g/min.hole. A fiber having a ratio of the first component to the second component of 2:1 was extruded at a spinning temperature of 220°C by a spunbond method.
- PET polyethylene terephthalate
- the extruded filaments are stretched in the traction zone using the suction force of the moving collection surface, then passed through a diffuser and deposited on the moving collection surface to form an eccentric sheath-core composite with an average fiber diameter of 4.0 dtex.
- a long fiber web was prepared.
- the obtained eccentric sheath-core type conjugate long fiber web was adhered to each other with hot air at a temperature of 130° C. and a hot air velocity of 0.7 m/s to form a nonwoven fabric 7 having a basis weight of 30 g/m 2 and a number of crimps of 13/inch. got
- Nonwoven fabric 8 A linear low-density polyethylene (LLDPE) resin with a melt index (MI) of g/10 min (measured at a temperature of 230°C and a load of 2.16 kg according to JIS-K7210) was discharged at a discharge rate of 0.55 g/min ⁇ hole. It was extruded at a spinning temperature of 220° C. by the spunbond method. The extruded filaments were stretched in the pulling zone using the suction force of the moving collecting surface, passed through a diffuser and deposited on the moving collecting surface to prepare a filament web having an average fiber diameter of 2.0 dtex. .
- MI melt index
- the obtained long fiber web is passed between a flat roll and an embossed roll (crimped area ratio of 6.3%) to partially compress the fibers to each other, and the line is adjusted so that the target basis weight is 13 g/m 2 .
- a nonwoven fabric 8 was obtained by adjusting the speed.
- Nonwoven fabric 9 A polylactic acid polymer having a melting point of 167° C. and an MFR of 44 g/10 min was mixed with polybutylene succinate having a melt flow ratio of 1.1 by dry blending so that the amount added was 10% by mass. It was extruded by a spunbond method at a spinning temperature of 230° C. to obtain a 2.0 dtex polylactic acid-based blended filament web. Next, the obtained filament web was passed between a flat roll and an embossed roll (crimping area ratio of 7.1%) to partially compress the fibers, and the line was formed so that the target basis weight was 13 g/m 2 . A nonwoven fabric 9 was obtained by adjusting the speed.
- Nonwoven fabric 1 was coated with the processing agent of Example 1 by the method of coating method 1 and wound up at a roll length of 10,000 m to obtain a nonwoven fabric of Example 49.
- Various measurement results of the obtained nonwoven fabric are shown in Table 5 below.
- Examples 50 to 106, Comparative Examples 8 to 14 Nonwoven fabrics of Examples 50 to 106 and Comparative Examples 8 to 14 were obtained in the same manner as in Example 49, except that the combination of the processing agent, nonwoven fabric, and coating method was changed as shown in Tables 5 to 8 below. Various measurement results of the obtained nonwoven fabric are shown in Tables 5 to 8 below.
- the nonwoven fabric processing agent according to the present invention can repeatedly provide nonwoven fabrics with excellent water permeability, and has little change in adhesion rate during continuous coating. It can be particularly suitably used as a processing agent for non-woven fabrics for top sheets and second sheets such as.
- the nonwoven fabric processing agent according to the present invention can be used, for example, for masks, body warmers, tape bases, patch bases, emergency bandages, packaging materials, wipe products, medical gowns, bandages, clothing, and skin care sheets. It can also be suitably used as a processing agent for nonwoven fabrics.
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Abstract
Description
かかる従来技術の問題に鑑み、本発明が解決しようとする課題は、繰返し透水性に優れた不織布を与えることができ、かつ、連続塗工中の付着率の変化が少ない不織布用加工剤、及びこれを含有する不織布を提供することである。
[1]下記一般式1:
[2]前記アニオン系界面活性剤Bを、前記化合物Aと該アニオン系界面活性剤Bの合計質量に対して、0.5質量%~30質量%含む、前記[1]に記載の不織布用加工剤。
[3]下記一般式2:
R5-COOH …一般式2
{式中、R5は、炭素数7~21のアルキル基又は炭素数7~21のアルケニル基である。}で表される化合物Cをさらに含み、該化合物Cの含有量は、前記化合物Aと該化合物Cの合計質量に対して、0.02質量%~5質量%である、前記[1]又は[2]に記載の不織布用加工剤。
[4]前記化合物Aが、下記一般式3:
[5]下記一般式4:
HO-(A3O)p-H …一般式4
{式中、A3は、炭素数2~4のアルキレン基であり、そしてpは、1~3の整数である。}で表される化合物Dを、前記化合物Aに対して、1質量%以下で含有する、前記[1]~[4]のいずれかに記載の不織布用加工剤。
[6]化合物Eとしてポリエーテル変性シリコーンをさらに含有する、[1]~[5]のいずれかに記載の不織布用加工剤。
[7]前記化合物A、前記アニオン系界面活性剤B、前記化合物C、前記化合物D、及び前記化合物Eの、105℃で3時間熱処理した後の乾燥残分の合計が、熱処理前の重量の合計に対して97質量%以上である、前記[1]~[6]のいずれかに記載の不織布用加工剤。
[8]前記アニオン系界面活性剤Bが、スルホン酸塩、硫酸エステル塩、カルボン酸塩、及びリン酸エステル塩からなる群から選択される少なくとも1つである、前記[1]~[7]のいずれかに記載の不織布用加工剤。
[9]前記アニオン系界面活性剤Bが、スルホン酸塩、硫酸エステル塩、カルボン酸塩、及びリン酸エステル塩からなる群から選択される少なくとも1つであり、下記一般式2:
R5-COOH …一般式2
{式中、R5は、炭素数7~21のアルキル基又は炭素数7~21のアルケニル基である。}で表される化合物Cをさらに含み、該化合物Cの含有量は、前記化合物Aと該化合物Cの合計質量に対して、0.02質量%~5質量%である、前記[1]~[8]のいずれかに記載の不織布用加工剤。
[10]前記[1]~[9]のいずれかに記載の不織布用加工剤を含有する、不織布。
本発明に係る不織布用加工剤が、水系溶媒に均一に分散する性能(希釈展開性又は水溶性)と不織布への親和性をバランス良く有しているため、このような効果を発揮できたものと考えられる。ここで水系溶媒とは、水、又は、水と水に溶解する有機溶剤との混合溶媒を指す。
(A1O)l、(A2O)mで表されるポリアルキレンオキシ基は、炭素数2のアルキレンオキシ基(エチレンオキシ基)と炭素数3のアルキレンオキシ基(プロピレンオキシ基)とを両方含むことが好ましい。この場合、エチレンオキシ基とプロピレンオキシ基の含有比率は、モル比で、エチレンオキシ基:プロピレンオキシ基=5:95~50:50が好ましく、5:95~40:60がより好ましく、10:90~30:70がさらに好ましい。(A1O)l、(A2O)mで表されるポリアルキレンオキシ基が複数のアルキレンオキシ基からなる場合、ブロック付加体であってもランダム付加体であってもよい。lとmはそれぞれ、(A1O)lと(A2O)mで表されるポリアルキレンオキシ基の重合度を表し、lは、0又は1~1000の整数を表し、mは、1~1000の整数を表すが、濡れ戻り性(透水した排泄物などが不織布表面に戻ってくることが少ないこと)と繰返し透水性の観点から、lとmは、共に10~200が好ましい。
(A1O)l、(A2O)mで表されるポリアルキレンオキシ基は、炭素数2のアルキレンオキシ基(エチレンオキシ基)と炭素数3のアルキレンオキシ基(プロピレンオキシ基)とを両方含むことが好ましい。この場合、エチレンオキシ基とプロピレンオキシ基の含有比率は、モル比で、エチレンオキシ基:プロピレンオキシ基=5:95~50:50が好ましく、5:95~40:60がより好ましく、10:90~30:70がさらに好ましい。(A1O)l、(A2O)mで表されるポリアルキレンオキシ基が複数のアルキレンオキシ基からなる場合、ブロック付加体であってもランダム付加体であってもよい。lとmはそれぞれ、(A1O)lと(A2O)mで表されるポリアルキレンオキシ基の重合度を表し、lは、0又は1~1000の整数を表し、mは、1~1000の整数を表すが、繰返し透水性の観点から、lとmは、共に10~200が好ましい。
1価カルボン酸としては、炭素数1~24のカルボン酸が挙げられる。このようなカルボン酸は分岐や二重結合を持っていても構わない。2価カルボン酸としては、例えば、テレフタル酸、イソフタル酸、フタル酸等の芳香族ジカルボン酸、1,4-シクロヘキサンジカルボン酸、アジピン酸、セバシン酸、マレイン酸、コハク酸等の脂肪族ジカルボン酸を挙げることができる。この中でも濡れ戻り性と繰返し透水性の観点から、脂肪族ジカルボン酸が好ましく用いられ、より好ましくはアジピン酸、コハク酸が用いられる。
アニオン界面活性剤としては、特に限定されるものではなく、公知のものが使用可能であるが、溶媒への希釈展開性の点から、スルホン酸塩、硫酸エステル塩、カルボン酸塩、及びリン酸エステル塩からなる群から選択される少なくとも1つであることが好ましい。塩を形成する対イオンとしては、K、Na、Li又は第一級~第四級のアンモニウムイオンであってよい。
前記ポリカルボン酸系ポリマー中のカルボキシル基は、少なくとも一部がアルカリ金属やアミン系化合物などによって中和されているものである。ここで、アルカリ金属としてはナトリウム、カリウム、リチウムなどが挙げられ、アミン系化合物としてはアンモニア、モノエタノールアミン、ジエタノールアミン、トリエタノールアミンなどが挙げられる。
R5-COOH …一般式2
{式中、R5は、炭素数7~21のアルキル基又は炭素数7~21のアルケニル基である。}で表される化合物C(以下、成分Cともいう。)をさらに含むことが好ましい。
R5の炭素数は、繰返し透水性の観点から9~19が好ましく、11~17がさらに好ましい。成分Cの具体例としては、カプリル酸、ペラルゴン酸、カプリン酸、ラウリン酸、ミリスチン酸、ペンタデシル酸、パルミチン酸、パルイトレイン酸、マルガリン酸、ステアリン酸、オレイン酸、バクセン酸、リノール酸、エイコサン酸、ベヘン酸などが挙られる。
本実施形態の加工剤に成分Cを含有させる方法は、成分Aの合成後に成分Cを添加する方法、成分Aを合成する際に過剰の成分Cを加える方法、及び、成分Aを合成する際に反応時間を調整して成分Cを未反応物として残留させる方法、等が挙げられる。
HO-(A3O)p-H …一般式4
{式中、A3は、炭素数2~4のアルキレン基であり、そしてpは、1~3の整数である。}で表される化合物D(以下、成分Dともいう。)を含んでいてもよいが、
成分Dの含有率は、繰返し透水性の観点から、化合物Aに対して、1.0質量%以下が好ましく、出来るだけ少ないことが好ましく、0質量%であることが最も好ましい。
また、本実施形態の加工剤を付与した不織布を、例えば凹凸形状を付与するため後加工を施したとき、後加工時の熱によって加工剤の成分が蒸発しにくいため、後加工前後で不織布の透水性能が低下しにくい。
HLB=(親水基×20)/分子量
に変更したものである。ここで、親水基とは、エチレンオキサイド基を指す。
ポリエーテル変性シリコーンのポリオキシアルキレン骨格に特に制限はなく、例えば、ポリオキシエチレン骨格、ポリオキシプロピレン骨格、ポリオキシトリメチレン骨格、ポリオキシブチレン骨格、ポリオキシテトラメチレン骨格などが例示される。これらの骨格としては、1種のポリオキシアルキレンの単独骨格、及び2種以上のポリオキシアルキレンの混合骨格(ランダム)、又は順次骨格(ブロック)などを挙げることができ、これらの骨格は、シリコーンの両末端、シリコーンの側鎖若しくは主鎖中に導入されていてもよい。これらの中で、ポリオキシエチレン骨格、並びにポリオキシエチレン骨格とポリオキシプロピレン骨格の混合骨格及び順次骨格は、繰り返し透水性を向上させるので、特に好適に用いることができる。このようなポリエーテル変性シリコーンとしては、例えば、二重結合を有するアルコールや二重結合を有するアルコールにアルキレンオキサイドを付加した化合物に、メチルハイドロジェンシリコーンなどの活性水素基を有するシリコーンを反応させて得られるメチルハイドロジェンシリコーンの側鎖ポリオキシアルキレン型、メチルハイドロジェンシリコーン・ポリオキシアルキレン重合型などを挙げることができる。
二重結合を有するアルコールとしては、炭素数2~6の1価又は多価アルコールを挙げることができる。繰り返し透水性の観点から炭素数2~6の多価アルコールが好ましい。
二重結合を有するアルコールへのアルキレンオキサイドの付加に用いるアルキレンオキサイドとしては、例えば、エチレンオキサイド、プロピレンオキサイド、トリメチレンオキサイド、テトラヒドロフラン、1,2-ブチレンオキサイド、2,3-ブチレンオキサイド、イソブチレンオキサイドなどを挙げることができる。
不織布中の加工剤純分(水等の加工剤を希釈する溶媒を除いた純分)の付着率(純分付着率)は、目的とする用途によって異なるが、0.10質量%~1.50質量%の範囲が好ましく、より好ましくは0.15質量%~1.00質量%である。0.10質量%以上であれば十分な透水性能が得られ、1.00質量%以下であれば、肌に接触する用途において、肌のかぶれや、湿疹が発生する可能性が低まる傾向にある。
不織布への加工剤の付与方法としては、浸漬法、噴霧法、コーティング法等の公知の方法が採用でき、特に限定されない。また加工剤付与後、後述の乾燥手段を用いて乾燥してもよい。また、加工剤付与前に不織布へのコロナ放電処理、常圧プラズマ放電処理などの処理も必要に応じて採用してもよい。
キスコーターはステンレス製アプリケーターロールを用い、キスコーターの回転速度と抱き角を調製して不織布加工剤を塗工することが好ましい。
不織布をCD方向に5等分して1cm角の試験片を採取し、キーエンス社製マイクロスコープVHX-700Fで繊維の直径を各20点ずつ測定し、その平均値と繊維を構成する樹脂の密度から平均繊度を算出した。
JIS-L1906:2000に準じ、MD方向20cm×CD方向5cmの試験片を不織布のCD方向に採取位置が均等になるように5枚採取して質量を測定し、その平均値を単位面積あたりの質量に換算して目付(g/m2)として求めた。
質量Iが既知のガラス製シャーレに、加工剤5.0±0.2gを入れ、質量IIを測定した後、蓋を被せていない状態で、予め105℃に昇温した熱風オーブン内に3時間投入する。取り出したシャーレの質量IIIを測定し、下記式から乾燥残分を求めた。
乾燥残分(%)=(質量III-質量I)/(質量II-質量I)×100
純分付着率は、インテック社 迅速残脂抽出装置(OC-1型)を用い、迅速抽出法によりN=3で測定し、その平均値より求めた。測定方法の詳細は以下の通りである。
(1)加工剤で処理された不織布を2g±0.5gとなる様にサンプリングし、質量iを測定する。
(2)抽出液を受けるアルミニウム皿の質量iiを量り、抽出機の150℃に設定されたヒーターの上にセットする。
(3)サンプリングした不織布を金属製の筒に充填する。
(4)金属製の筒内にメタノールを10cc添加し、不織布を濡らす。
(5)筒の上部に蓋をし、3分間静置する。これを抽出時間とする。
(6)付属のハンドルを用いて筒内の不織布から、メタノールを搾り取り、アルミトレイ内に滴下する。
(7)メタノールが完全に蒸発したことを目視で確認後、ヒーターからアルミニウム皿を取り外し、2分間空冷する。
(8)アルミニウム皿の質量iiiを測定する。
(9)不織布に付着している加工剤の量を下記式:
純分付着率[質量%]=100×[(アルミ皿の質量iii)-(アルミ皿の質量ii)]/不織布質量i
から算出する。
加工剤を連続塗工した後に紙管に巻き取り作製した不織布ロールにおいて、不織布ロール半径から紙管半径を差し引いた距離を巻厚とした時、紙管側10%の巻厚を内層(巻内)とし、不織布ロール最外側10%の巻厚を外層(巻外)とする。不織布ロールを切り開き、上記各々範囲内の位置において前記4に記載の純分付着率の測定を行ない、下記の計算式:
(純分付着率の保持率)={(巻外の純分付着率)÷(巻内の純分付着率)}×100
により純分付着率の保持率を求めた。
吸収体としてトイレットペーパー シングル(大高製紙株式会社社製 デラックス100 114mm×100m巻)を10枚重ねて、その上に試験布(20cm×30cm)を置く。さらにその上に直径1.5cmの穴を等間隔に10ヶ所開けたステンレス製の板を置き、それぞれの穴に位置する布の上方10mmの高さから生理食塩水0.05gを滴下し、3分経過後、再度同様に滴下する。5回目の滴下後、10秒以内に吸収される穴の数(a)を数える。これを同じ試料の40ヶ所について試験し{((a)×100/(穴10ヶ所×試料40ヶ所))}を5回目の繰返し透水性(%)とした。また、継続して6回目の滴下後も5回目と同様に10秒以内に吸収される穴の数(b)を数え、{((b)×100/(穴10ヶ所×試料40ヶ所))}を6回目の繰返し透水性(%)とした。
45度に傾斜した板上に吸収体としてトイレットペーパー シングル(大高製紙株式会社社製 デラックス100 114mm×100m巻)を10枚重ねて、その上に試験布(20cm角)を置いてセットし、布の上方10mmの高さから0.05gの生理食塩水を滴下した。滴下位置から吸収終了までの生理食塩水が流れ落ちた距離を読み取った。この測定を試験布内で任意に20点
行い、その平均値を45度傾斜流長(mm)とした。
成分Aとして、以下のとおり合成される成分A-1~A-25を用いた。
[成分A-1]
プロピレングリコールに、常法に従い、プロピレンオキサイド29モル、次いでエチレンオキサイド10モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルと、ラウリン酸1モルとを反応させて成分A-1を得た。成分A-1は、一般式(3)において、nが0であり、R1が炭素数12のアルカノイル基であり、(A1O)lがプロピレンオキサイド30モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが40)である化合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド29モル、次いで、エチレンオキサイド10モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルとラウリン酸2モルとを反応させて成分A-2を得た。成分A-2は、一般式(1)において、nが0であり、R1とR3が炭素数12のアルカノイル基であり、(A1O)lがプロピレンオキサイド30モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが40)である化合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド64モル、次いでエチレンオキサイド10モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルと、ステアリン酸1.5モルとを反応させて成分A-3を得た。成分A-3は、一般式(1)において、nが0であり、R1とR3が炭素数18のアルカノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、一般式(3)において、nが0であり、R1が炭素数18のアルカノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、の1:1混合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド64モル、次いでエチレンオキサイド10モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルと、オレイン酸1.5モルとを反応させて成分A-4を得た。成分A-4は、一般式(1)において、nが0であり、R1とR3が炭素数18のアルケノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、一般式(3)において、nが0であり、R1が炭素数18のアルケノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、の1:1混合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド64モル、次いでエチレンオキサイド10モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルと、オレイン酸1.2モルとを反応させて成分A-5を得た。成分A-5は、一般式(1)において、nが0であり、R1とR3が炭素数18のアルケノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、一般式(3)において、nが0であり、R1が炭素数18のアルケノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、の2:8混合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド64モル、次いでエチレンオキサイド10モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルと、ベヘニン酸1.25モルとを反応させて成分A-6を得た。成分A-6は、一般式(1)において、nが0であり、R1とR3が炭素数22のアルカノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、一般式(3)において、nが0であり、R1が炭素数22のアルカノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、の25:75混合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド64モル、次いでエチレンオキサイド10モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルと、オレイン酸1.6モルとを反応させて成分A-7を得た。成分A-7は、一般式(1)において、nが0であり、R1とR3が炭素数18のアルケノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、一般式(3)において、nが0であり、R1が炭素数18のアルケノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、の6:4混合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド64モル、次いでエチレンオキサイド10モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルと、オレイン酸1.7モルとを反応させて成分A-8を得た。成分A-8は、一般式(1)において、nが0であり、R1とR3が炭素数18のアルケノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、一般式(3)において、nが0であり、R1が炭素数18のアルケノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、の7:3混合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド64モル、次いでエチレンオキサイド10モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルと、オレイン酸1.8モルとを反応させて成分A-9を得た。成分A-9は、一般式(1)において、nが0であり、R1とR3が炭素数18のアルケノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、一般式(3)において、nが0であり、R1が炭素数18のアルケノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、の8:2混合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド64モル、次いでエチレンオキサイド10モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルと、カプリル酸1.9モルとを反応させて成分A-10を得た。成分A-10は、一般式(1)において、nが0であり、R1とR3が炭素数8のアルカノイル基であり、(A2O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、一般式(3)において、nが0であり、R1が炭素数8のアルカノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、の9:1混合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド64モル、次いでエチレンオキサイド10モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルと、オレイン酸1.95モルとを反応させて成分A-11得た。成分A-11は、一般式(1)において、nが0であり、R1とR3が炭素数18のアルケノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、一般式(3)において、nが0であり、R1が炭素数18のアルケノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、の95:5混合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド16モル、次いでエチレンオキサイド3モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルと、オレイン酸1.5モルとを反応させて成分A-12を得た。成分A-12は、一般式(1)において、nが0であり、R1とR3が炭素数18のアルケノイル基であり、(A2O)lがプロピレンオキサイド17モルの両末端に合計3モルのエチレンオキサイドが付加した基(lが20)である化合物と、一般式(3)において、nが0であり、R1が炭素数18のアルケノイル基であり、(A1O)lがプロピレンオキサイド17モルの両末端に合計3モルのエチレンオキサイドが付加した基(lが20)である化合物と、の1:1混合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド16モル、次いでエチレンオキサイド8モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルと、ラウリン酸1.5モルとを反応させて成分A-13を得た。成分A-13は、一般式(1)において、nが0であり、R1とR3が炭素数12のアルカノイル基であり、(A2O)lがプロピレンオキサイド17モルの両末端に合計8モルのエチレンオキサイドが付加した基(lが25)である化合物と、一般式(3)において、nが0であり、R1が炭素数12のアルカノイル基であり、(A1O)lがプロピレンオキサイド17モルの両末端に合計8モルのエチレンオキサイドが付加した基(lが25)である化合物と、の1:1混合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド79モル、次いでエチレンオキサイド20モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルと、オレイン酸1.5モルとを反応させて成分A-14を得た。成分A-14は、一般式(1)において、nが0であり、R1とR3が炭素数18のアルケノイル基であり、(A1O)lがプロピレンオキサイド80モルの両末端に合計20モルのエチレンオキサイドが付加した基(lが100)である化合物と、一般式(3)において、nが0であり、R1が炭素数18のアルケノイル基であり、(A1O)lがプロピレンオキサイド80モルの両末端に合計20モルのエチレンオキサイドが付加した基(lが100)である化合物と、の1:1混合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド99モル、次いでエチレンオキサイド40モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルと、ラウリン酸1.5モルとを反応させて成分A-15を得た。成分A-15は、一般式(1)において、nが0であり、R1とR3が炭素数12のアルカノイル基であり、(A1O)lがプロピレンオキサイド100モルの両末端に合計40モルのエチレンオキサイドが付加した基(lが140)である化合物と、一般式(3)において、nが0であり、R1が炭素数12のアルカノイル基であり、(A1O)lがプロピレンオキサイド100モルの両末端に合計40モルのエチレンオキサイドが付加した基(lが140)である化合物と、の1:1混合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド64モル、次いでエチレンオキサイド10モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルと、ラウリン酸1.5モルとを反応させて成分A-16を得た。成分A-16は、一般式(1)において、nが0であり、R1とR3が炭素数12のアルカノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、一般式(3)において、nが0であり、R1が炭素数12のアルカノイル基であり、(A1O)lがプロピレンオキサイド65モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが75)である化合物と、の1:1混合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド29モル、次いでエチレンオキサイド26モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール1モルと、ラウリン酸1.8モルとを反応させて成分A-17を得た。成分A-17は、一般式(1)において、nが0であり、R1とR3が炭素数12のアルカノイル基であり、(A1O)lがプロピレンオキサイド30モルの両末端に合計26モルのエチレンオキサイドが付加した基(lが56)である化合物と、一般式(3)において、nが0であり、R1が炭素数12のアルカノイル基であり、(A1O)lがプロピレンオキサイド30モルの両末端に合計26モルのエチレンオキサイドが付加した基(lが56)である化合物と、の8:2混合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド34モルを付加してポリプロピレングリコールを得た。次いで、このポリプロピレングリコール1モルとステアリン酸2モルとを反応させて成分A-18を得た。成分A-18は、一般式(1)において、nが0であり、R1とR3が炭素数18のアルカノイル基であり、(A1O)lがプロピレンオキサイド35モルの基(lが35)である化合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド29モル、次いで、エチレンオキサイド10モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール3モルとアジピン酸2モルとを反応させた。次いで、この反応物とラウリン酸1モルとを反応させて成分A-19を得た。成分A-19は、一般式(3)において、R1が炭素数12のアルカノイル基であり、(A1O)lがプロピレンオキサイド30モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが40)であり、R2が炭素数4のアルキレン基であり、(A2O)mがプロピレンオキサイド30モルの両末端に合計10モルのエチレンオキサイドが付加した基(mが40)であり、nが2である化合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド29モル、次いで、エチレンオキサイド10モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール3モルとアジピン酸2モルとを反応させた。次いで、この反応物とラウリン酸1.5モルとを反応させて成分A―20を得た。成分A―20は、一般式(1)において、R1とR3が炭素数12のアルカノイル基であり、(A1O)lがプロピレンオキサイド30モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが40)であり、R2が炭素数4のアルキレン基であり、(A2O)mがプロピレンオキサイド30モルの両末端に合計10モルのエチレンオキサイドが付加した基(mが40)であり、nが2である化合物と、一般式(3)において、R1が炭素数12のアルカノイル基であり、(A1O)lがプロピレンオキサイド30モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが40)であり、R2が炭素数4のアルキレン基であり、(A2O)mがプロピレンオキサイド30モルの両末端に合計10モルのエチレンオキサイドが付加した基(mが40)であり、nが2である化合物と、の1:1混合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド29モル、次いで、エチレンオキサイド10モルを付加してポリオキシアルキレングリコールを得た。次いで、このポリオキシアルキレングリコール3モルとアジピン酸4モルとを反応させて成分A―21を得た。 成分A―21は、一般式(1)において、R1とR3が、R4がブチレン基である-C(O)-C4H8ーCOOHであり、(A1O)lがプロピレンオキサイド30モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが40)であり、R2が炭素数4のアルキレン基であり、(A2O)mがプロピレンオキサイド30モルの両末端に合計10モルのエチレンオキサイドが付加した基(mが40)であり、nが2である化合物である。
ラウリルアルコールに、常法に従い、エチレンオキサイド5モル付加後に、プロピレンオキサイド30モル、エチレンオキサイド5モルを順次付加して、ポリオキシアルキレングリコールラウリルエーテルを得た。次いで、このポリオキシアルキレングリコールラウリルエーテル1モルと、ラウリン酸1モルとを反応させて成分A-22を得た。成分A-22は、一般式(1)において、nが0であり、R1が炭素数12のアルキル基であり、R3が炭素数12のアルカノイル基であり、(A1O)lがプロピレンオキサイド30モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが40)である化合物である。
ステアリルアルコールに、常法に従い、エチレンオキサイド5モル付加後に、プロピレンオキサイド30モル、エチレンオキサイド5モルを順次付加して、ポリオキシアルキレングリコールステアリルエーテルを得た。次いで、このポリオキシアルキレングリコールステアリルエーテル1モルと、ステアリン酸1モルとを反応させて成分A-23を得た。成分A-23は、一般式(2)において、nが0であり、R1が炭素数18のアルキル基であり、R3が炭素数18のアルカノイル基であり、(A1O)lがプロピレンオキサイド30モルの両末端に合計10モルのエチレンオキサイドが付加した基(lが40)である化合物である。
プロピレングリコールに、常法に従い、プロピレンオキサイド29モル、次いでエチレンオキサイド10モルを付加してポリオキシアルキレングリコールを得た。これを成分A-24とする。
エチレングリコールに、常法に従い、エチレンオキサイド44モルを付加してポリエチレングリコールを得た。次いで、このポリエチレングリコール1モルと、ステアリン酸1.5モルとを反応させて成分A-25を得た。成分A-25は、一般式(1)において、nが0であり、R1とR3が炭素数18のアルカノイル基であり、(A1O)lがエチレンオキサイド45モルの基(lが45)である化合物と、一般式(3)において、nが0であり、R1が炭素数18のアルカノイル基であり、(A1O)lがエチレンオキサイド45モルの基(lが45)である化合物と、の1:1混合物である。
成分Bとして、以下の成分B-1~B-7を用いた。
[成分B-1]
ジオクチルスルホコハク酸ナトリウムとして、花王株式会社製 ペレックスOT-Pを使用した。
[成分B-2]
ポリオキシエチレンラウリルエーテル硫酸ナトリウムとして、花王株式会社製 エマール20Cを使用した。
[成分B-3]
ドデシルベンゼンスルホン酸ナトリウムとして、花王株式会社製 ネオペレックスG-25を使用した。
[成分B-4]
ポリカルボン酸ナトリウムとして、三洋化成株式会社製 セロポールPC-300を使用した。
[成分B-5]
ドデシルリン酸エステルナトリウムとして、東京化成株式会社製試薬を使用した。
[成分B-6]
ポリエチレングリコールアルキルエーテルとして、日本触媒株式会社製 ソフタノール90を使用した。
[成分B-7]
アルキルトリメチルアンモニウム塩酸塩として、ライオンスペシャリティケミカルズ株式会社製 リポガードT-28を使用した。
成分Cとして、以下の成分C-1~C-3を用いた。
[成分C-1]
オレイン酸として、日油株式会社製 NAA-34を使用した。
[成分C-2]
ステアリン酸として、日油株式会社製 粉末ステアリン酸さくらを使用した。
[成分C-3]
ラウリン酸として、日油株式会社製 NAA-122を使用した。
成分Dとして、以下の成分D-1を用いた。
[成分D-1]
プロピレングリコールとして株式会社ADEKA製を使用した。
成分Eとして、以下の成分E-1~E-4を用いた。
[成分E-1]
ポリエーテル変性シリコーンとして、信越化学工業株式会社製 KF-615A(HLB=10、粘度920mm2/s)を使用した。
[成分E-2]
ポリエーテル変性シリコーンとして、信越化学工業株式会社製 KF-353(HLB=10、粘度430mm2/s)を使用した。
[成分E-3]
ポリエーテル変性シリコーンとして、信越化学工業株式会社製 KF-352A(HLB=7、粘度1600mm2/s)を使用した。
[成分E-4]
ポリエーテル変性シリコーンとして、ダウ東レ株式会社製 L-7604(HLB=13、粘度400mm2/s)を使用した。
成分A-1が69.5質量%、成分B-1が5質量%、成分C-3が0.5質量%、及び成分E-1が25質量%となるよう、各成分を30℃で混合して、実施例1の加工剤を得た。各成分の含有比率を以下の表1に示す。
成分A、成分B、成分C、成分D、及び成分Eの含有比率が、以下の表1~4のとおりとなるように各成分の混合比率を変更した他は、実施例1と同様にして、実施例2~48、及び比較例1~7の加工剤を得た。各成分の含有比率を以下の表1~4に示す。
[不織布1]
メルトフローレート(MFR)が55g/10分(JIS-K7210に準じ、温度230℃、荷重2.16kgで測定)のポリプロピレン(PP)樹脂を吐出量0.88g/分・hоleとなる様にスパンボンド法で、紡糸温度220℃で押出し、このフィラメント群をエアジェットによる高速牽引装置を使用して、移動捕集面に向けて押出し、平均繊維径1.5dtexの長繊維ウェブを調製した。
次いで、得られた長繊維ウェブをフラットロールとエンボスロール(圧着面積率6.3%)の間に通して繊維同士を部分圧着して、目的とする目付が13g/m2となる様にライン速度を調整し、不織布1を得た。
エチレン成分含有量が4.3モル%、MFRが24のエチレン・プロピレンランダム共重合体樹脂(r-PP)を吐出量0.84g/分・hоleとなる様にスパンボンド法で、紡糸温度230℃で押出し、このフィラメント群をエアジェットによる高速牽引装置を使用して、移動捕集面に向けて押出し、平均繊維径1.5dtexの長繊維ウェブを作製した。次いで、得られた長繊維ウェブを不織布の製造(1)で使用したものと同じフラットロール/エンボスロールを用いて繊維同士を部分圧着して、目的とする目付が13g/m2となる様にライン速度を調整し、不織布2を得た。
MFRが55g/10分(JIS-K7210に準じ、温度230℃、荷重2.16kgで測定)のポリプロピレン(PP)樹脂を第1成分とし、MIが26g/10分(JIS-K7210に準じ、温度190℃、荷重2.16kgで測定)の高密度ポリエチレン(HDPE)樹脂を第2成分とし、第1成分の吐出量が0.4g/分・hоle、第2成分の吐出量が0.4g/分・hоleで全吐出量が0.8g/分・hоleであり、第1成分と第2成分の比が1/1となる繊維をスパンボンド法により紡糸温度220℃で押出し、このフィラメント群をエアジェットによる高速気流牽引装置を使用して、移動捕集面に向けて押出し平均繊維径2.3dtexの偏芯鞘芯型複合長繊維ウェブを調製した。
次いで、得られた偏芯鞘芯型複合長繊維不織ウェブをフラットロールとエンボスロール(圧着面積率7.9%)の間に通して繊維同士を接着し、目付20g/m2、捲縮数17個/インチの不織布3を得た。
不織布3の製造で用いたものと同じポリマーを用いて、第1成分(ポリプロピレン)の吐出量が0.40g/分・hоle、第2成分(高密度ポリエチレン)の吐出量が0.40g/分・hоleで全吐出量が0.8g/分・hоleであり、第1成分と第2成分の比が1:1となる繊維をスパンボンド法により紡糸温度220℃で押出した。押出したフィラメントは、移動捕集面の吸引力を利用して牽引ゾーン内で延伸させた後、ディフューザーを通し移動捕集面に堆積させて、平均繊維径3.0dtexのサイドバイサイド型複合長繊維ウェブを調製した。得られたサイドバイサイド型長繊維不織ウェブをフラットロールとエンボスロール(圧着面積率7.9%)の間に通して繊維同士を接着し、目付20g/m2、捲縮数17個/インチの不織布4を得た。
不織布3の製造で用いたものと同じポリマーを用いて、第1成分(ポリプロピレン)の吐出量が0.40g/分・hоle、第2成分(高密度ポリエチレン)の吐出量が0.40g/分・hоleで全吐出量が0.8g/分・hоleであり、第1成分と第2成分の比が1:1となる繊維をスパンボンド法により紡糸温度220℃で押出した。押出したフィラメントは、移動捕集面の吸引力を利用して牽引ゾーン内で延伸させた後、ディフューザーを通し移動捕集面に堆積させて、平均繊維径3.0dtexのサイドバイサイド型複合長繊維ウェブを調製した。得られたサイドバイサイド型長繊維不織ウェブを熱風温度142℃、熱風風速0.7m/sの熱風により繊維同士を接着し、目付15g/m2、捲縮数15個/インチの不織布5を得た。
MFRが36g/10分(JIS-K7210に準じ、温度230℃、荷重2.16kgで測定)のポリプロピレン(PP)樹脂を第1成分とし、MIが17g/10分(JIS-K7210に準じ、温度190℃、荷重2.16kgで測定)の直鎖状低密度ポリエチレン(LLDPE)樹脂を第2成分とし、第1成分の吐出量が0.40g/分・hоle、第2成分の吐出量が0.40g/分・hоleで全吐出量が0.80g/分・hоleであり、第1成分と第2成分の比が1/1となる繊維をスパンボンド法により紡糸温度220℃で押出し、このフィラメント群をエアジェットによる高速気流牽引装置を使用して、移動捕集面に向けて押出し平均繊維径2.8dtexのサイドバイサイド型複合長繊維ウェブを調製した。
次いで、熱風温度120℃、熱風風速1.0m/sの熱風により繊維同士を接着し、目付20g/m2、捲縮数25個/インチの不織布6を得た。
溶液粘度ηsp/c0.75のポリエチレンテレフタレート(PET)樹脂を第1成分とし、MIが26g/10分(JIS-K7210に準じ、温度190℃、荷重2.16kgで測定)の高密度ポリエチレン(HDPE)樹脂を第2成分とし、第1成分の吐出量が0.50g/分・hоle、第2成分の吐出量が0.25g/分・hоleで全吐出量が0.75g/分・hоleであり、第1成分と第2成分の比が2:1となる繊維をスパンボンド法により紡糸温度220℃で押出した。押出したフィラメントは、移動捕集面の吸引力を利用して牽引ゾーン内で延伸させた後、ディフューザーを通し移動捕集面に堆積させて、平均繊維径4.0dtexの偏芯鞘芯型複合長繊維ウェブを調製した。得られた偏芯鞘芯型複合長繊維ウェブを熱風温度130℃、熱風風速0.7m/sの熱風により繊維同士を接着し、目付30g/m2、捲縮数13個/インチの不織布7を得た。
メルトインデックス(MI)がg/10分(JIS-K7210に準じ、温度230℃、荷重2.16kgで測定)の直鎖状低密度ポリエチレン(LLDPE)樹脂を吐出量0.55g/分・hоleとなる様にスパンボンド法で、紡糸温度220℃で押出した。押出したフィラメントは、移動捕集面の吸引力を利用して牽引ゾーン内で延伸させた後、ディフューザーを通し移動捕集面に堆積させて、平均繊維径2.0dtexの長繊維ウェブを調製した。次いで、得られた長繊維ウェブをフラットロールとエンボスロール(圧着面積率6.3%)の間に通して繊維同士を部分圧着して、目的とする目付が13g/m2となる様にライン速度を調整し、不織布8を得た。
融点167℃、MFR44g/10minであるポリ乳酸系重合体に、溶融流動比が1.1であるポリブチレンサクシネートを添加量が10質量%となるようにドライブレンドにて混合し、吐出量0.8g/分・hоleとなる様にスパンボンド法で、紡糸温度230℃で押出し、2.0dtexのポリ乳酸系ブレンド長繊維ウェブを得た。ついで、得られた長繊維ウェブをフラットロールとエンボスロール(圧着面積率7.1%)の間に通して繊維同士を部分圧着して、目的とする目付が13g/m2となる様にライン速度を調整し、不織布9を得た。
不織布に、5質量%に調整した加工剤の水溶液を、液温25℃でキスコーターにて、塗布量が10質量%(純分付着率が0.5質量%)となるように、ステンレス製アプリケーターロールへの抱角とキスロール回転速度を調整しながら塗布し、125℃のエアスルードライヤーに通して乾燥させ、巻き取り、加工剤を含有した不織布を得た。
不織布に、2.5質量%に調整した加工剤の水溶液を液温20℃に調整し、塗布量が20質量%(純分付着率が0.5質量%)となるように、ローターダンプニング方式(RD)にて不織布に塗布し、125℃のエアスルードライヤーに通して乾燥させ、巻き取り、加工剤を含有した不織布を得た。使用したローターダンプニング装置のローターの直径は80mmであり、各ローターは、CD方向に115mm間隔、塗布する不織布とのローター中心の距離を180mmとなるように配置した。また、ローター回転数を調整し、噴霧される加工剤の噴霧粒子径が35μmとなるようにした。
不織布に、1.67質量%に調整した加工剤の水溶液を、塗布量が30質量%(純分付着率が0.5質量%)となるように、斜線柄120メッシュ、セル容積22cm3/m2のグラビアロールを用いて塗布し、120℃のシリンダードライヤーに通して乾燥させ、加工剤を含有した不織布を得た。
不織布1に、塗工方法1の方法で実施例1の加工剤を塗布し、巻長10000mで巻き取り、実施例49の不織布を得た。得られた不織布の各種測定結果を以下の表5に示す。
加工剤、不織布、塗工方法の組み合わせを以下の表5~8に示すように変更したほかは実施例49と同様にして、実施例50~106、比較例8~14の不織布を得た。得られた不織布の各種測定結果を以下の表5~8に示す。
Claims (10)
- 下記一般式1:
- 前記アニオン系界面活性剤Bを、前記化合物Aと該アニオン系界面活性剤Bの合計質量に対して、0.5質量%~30質量%含む、請求項1に記載の不織布用加工剤。
- 下記一般式2:
R5-COOH …一般式2
{式中、R5は、炭素数7~21のアルキル基又は炭素数7~21のアルケニル基である。}で表される化合物Cをさらに含み、該化合物Cの含有量は、前記化合物Aと該化合物Cの合計質量に対して、0.02質量%~5質量%である、請求項1又は2に記載の不織布用加工剤。 - 前記化合物Aが、下記一般式3:
- 下記一般式4:
HO-(A3O)p-H …一般式4
{式中、A3は、炭素数2~4のアルキレン基であり、そしてpは、1~3の整数である。}で表される化合物Dを、前記化合物Aに対して、1質量%以下で含有する、請求項1又は2に記載の不織布用加工剤。 - 化合物Eとしてポリエーテル変性シリコーンをさらに含有する、請求項1又は2に記載の不織布用加工剤。
- 前記化合物A、前記アニオン系界面活性剤B、前記化合物C、前記化合物D、及び前記化合物Eの、105℃で3時間熱処理した後の乾燥残分の重量の合計が、熱処理前の重量の合計に対して97質量%以上である、請求項1又は2に記載の不織布用加工剤。
- 前記アニオン系界面活性剤Bが、スルホン酸塩、硫酸エステル塩、カルボン酸塩、及びリン酸エステル塩からなる群から選択される少なくとも1つである、請求項1又は2に記載の不織布用加工剤。
- 前記アニオン系界面活性剤Bが、スルホン酸塩、硫酸エステル塩、カルボン酸塩、及びリン酸エステル塩からなる群から選択される少なくとも1つであり、下記一般式2:
R5-COOH …一般式2
{式中、R5は、炭素数7~21のアルキル基又は炭素数7~21のアルケニル基である。}で表される化合物Cをさらに含み、該化合物Cの含有量は、前記化合物Aと該化合物Cの合計質量に対して、0.02質量%~5質量%である、請求項1又は2に記載の不織布用加工剤。 - 請求項1又は2に記載の不織布用加工剤を含有する、不織布。
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