Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/08—Liquid soap, e.g. for dispensers; capsuled
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/04—Water-soluble compounds
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
  • D06B11/00—Treatment of selected parts of textile materials, e.g. partial dyeing
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
  • D06L1/12—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using aqueous solvents
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
  • D06L4/70—Multi-step processes
  • D06L4/75—Multi-step processes combined with cleaning or washing
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
  • D06P5/13—Fugitive dyeing or stripping dyes
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
  • D06P5/15—Locally discharging the dyes
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
  • Y02W30/00—Technologies for solid waste management
  • Y02W30/50—Reuse, recycling or recovery technologies
  • Y02W30/64—Paper recycling

Definitions

• the present invention relates to a composition for a deinking agent, a deinking agent, and a method for producing deinked printed fabric.
• This application claims priority based on Japanese Patent Application No. 2023-195491 filed in Japan on November 16, 2023, Japanese Patent Application No. 2024-071874 filed in Japan on April 25, 2024, and Japanese Patent Application No. 2024-173805 filed in Japan on October 2, 2024, the contents of which are incorporated herein by reference.
• Advertising flags which are rectangular strips of cloth tied to a pole, are displayed as promotional tools in front of stores of various businesses, mainly restaurants.
• the usage period of promotional flags is generally about two weeks to six months, and there is an issue of high turnover and large amounts of waste.
• greater emphasis has been placed on environmental considerations, and there is a demand for recycling promotional flags.
• Patent Document 1 discloses a method for decolorizing recycled flags, in which polyester fiber fabric printed with disperse dyes that make up flags is treated with a decolorizing treatment liquid that contains an alkaline agent, a reducing agent, and a nonionic surfactant.
• a decolorizing treatment liquid that contains an alkaline agent, a reducing agent, and a nonionic surfactant.
• the present invention was made in consideration of these circumstances, and aims to provide a deinking agent composition with better deinking properties, a deinking agent, and a method for producing deinked printed fabric.
• a composition for deinking comprising a basic compound and a surfactant.
• a deinking agent comprising the deinking agent composition described in any one of [1] to [5].
• a method for producing a deinked printed fabric comprising a deinking step of obtaining a deinked printed fabric by applying an external force to the printed fabric in the presence of the deinking agent described in [6].
• the method for producing a deinked printed fabric according to [7] wherein the treatment temperature in the deinking step is 45 to 100°C.
• the present invention it is possible to provide a deinking agent composition having better deinking properties, a deinking agent, and a method for producing deinked printed fabric.
• the present invention is excellent in the performance of removing ink (color paste, pigment printing agent) from printed fabric (deinking ability).
• it also has the ability to prevent the removed ink from transferring to the areas (white areas) of the deinked printed fabric where no ink was attached (white area staining).
• the deinking composition of the present embodiment is a composition used for removing ink from a printed fabric that has been printed with the ink.
• the deinking composition of the present embodiment contains a basic compound, and therefore has good deinking properties, and is therefore useful for deinking printed fabrics that have been printed with inks that contain pigments.
• the pH of the deinking composition of this embodiment is preferably more than 7 and 14 or less, more preferably 8 or more and 14 or less, even more preferably 10 or more and 14 or less, and particularly preferably 11 or more and 14 or more. If the pH of the deinking agent composition of this embodiment is within the above range, the deinking properties will be further improved.
• pH refers to the value measured when the deinking agent composition is at 25°C using a pH meter (product name: pH meter F-71, manufactured by Horiba, Ltd.).
• the deinking composition of this embodiment contains a basic compound and a surfactant.
• the basic compound includes a basic inorganic compound and a basic organic compound.
• Examples of the basic inorganic compound include alkali metal hydroxides, alkaline earth metal hydroxides, alkali metal hydrogen carbonates, and alkali metal carbonates.
• Examples of the alkali metal hydroxide include sodium hydroxide and potassium hydroxide.
• Examples of the alkaline earth metal hydroxide include magnesium hydroxide and calcium hydroxide.
• Examples of the alkali metal hydrogen carbonate include sodium hydrogen carbonate and potassium hydrogen carbonate.
• Examples of the alkali metal carbonate include sodium carbonate and potassium carbonate.
• the basic organic compounds include amines. Specific examples of the amine include ammonia, pyridine, arginine, lysine, triethylamine, and triethanolamine.
• the basic compound is preferably a basic inorganic compound, more preferably an alkali metal hydroxide, and more preferably sodium hydroxide or potassium hydroxide.
• the basic compounds may be used alone or in combination of two or more.
• the content of the basic compound is preferably 0.01 mass% or more, more preferably 0.1 mass% or more, and even more preferably 0.5 mass% or more, based on the total amount of the deinking agent composition of this embodiment.
• the content of the basic compound is preferably 5.0 mass% or less, more preferably 3.0 mass% or less, and even more preferably 1.5 mass% or less, based on the total amount of the deinking agent composition of this embodiment.
• the deinking property is further improved. If the content of the basic compound is equal to or less than the above-mentioned preferable upper limit, the influence on the printed fabric can be further reduced. Also, the danger of the deinking composition as a chemical substance can be reduced, and the recycling system can be easily spread.
• the content of the basic compound is preferably 0.01% by mass or more and 5.0% by mass or less, more preferably 0.1% by mass or more and 3.0% by mass or less, and even more preferably 0.5% by mass or more and 1.5% by mass or less, based on the total amount of the deinking agent composition of this embodiment.
• the surfactant may be any of an anionic surfactant, a nonionic surfactant, a cationic surfactant, and an amphoteric surfactant.
• the HLB value of the surfactant is preferably 1 or more and 18 or less, more preferably 3 or more and 17 or less, even more preferably 5 or more and 17 or less, and particularly preferably 6 or more and 17 or less.
• HLB Hydrophilic-Lipophile Balance
• nonionic surfactants are preferred.
• Nonionic surfactants polyoxyalkylene alkyl ether, polyoxyethylene styrylated phenyl ether, and polyoxyalkylene tribenzyl phenyl ether are preferred.
• Preferred polyoxyalkylene alkyl ethers include polyoxyethylene polyoxypropylene lauryl ether, polyoxyethylene polyoxypropylene tridecyl ether, polyoxyethylene polyoxypropylene branched decyl ether, and polyoxyethylene lauryl ether.
• the polyoxyalkylene tribenzyl phenyl ether is preferably polyoxyethylene tribenzyl phenyl ether.
• the HLB value of the polyoxyalkylene alkyl ether is preferably 1 or more and 15 or less, more preferably 3 or more and 14.5 or less, even more preferably 5 or more and 14 or less, and particularly preferably 6 or more and 10 or less.
• the HLB value of the polyoxyethylene styrylated phenyl ether is preferably 1 or more and 18 or less, more preferably 10 or more and 17 or less, even more preferably 12 or more and 17 or less, and particularly preferably 13 or more and 16 or less.
• polyoxyethylene styrylated phenyl ether is preferred as a nonionic surfactant.
• the surfactants may be used alone or in combination of two or more.
• the content of the surfactant is preferably 0.01 mass% or more, more preferably 0.05 mass% or more, and even more preferably 0.1 mass% or more, based on the total amount of the deinking agent composition of this embodiment.
• the content of the surfactant is preferably 5.0 mass% or less, more preferably 3.0 mass% or less, and even more preferably 1.0 mass% or less, based on the total amount of the deinking agent composition of this embodiment.
• the content of the surfactant is equal to or more than the above preferable lower limit, the deinking property is further improved.
• the content of the surfactant is equal to or less than the above-mentioned preferable upper limit, foaming is less likely to occur, and washing with water becomes easier.
• the surfactant content is preferably 0.01% by mass or more and 5.0% by mass or less, more preferably 0.05% by mass or more and 3.0% by mass or less, and even more preferably 0.1% by mass or more and 1.0% by mass or less, based on the total amount of the deinking agent composition of this embodiment.
• the deinking composition of this embodiment may contain optional components other than the basic compound and surfactant described above.
• optional components include water, a reducing agent, a chelating agent, and a flocculant.
• Water ⁇ Examples of water include ion-exchanged water, tap water, and distilled water. The water may be used alone or in combination of two or more kinds.
• the water content is preferably 90 to 99.98% by mass, more preferably 93 to 99% by mass, and even more preferably 95 to 99% by mass, based on the total amount of the deinking composition of this embodiment.
• the reducing agent includes hydrosulfite, thiourea dioxide, zinc sulfoxylate-formaldehyde, sodium sulfoxylate-formaldehyde, and the like.
• Chelating agents examples include ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA), diethylenetriaminepentaacetic acid (DTPA), gluconic acid, and hydroxyethylidene diphosphonic acid.
• EDTA ethylenediaminetetraacetic acid
• NTA nitrilotriacetic acid
• DTPA diethylenetriaminepentaacetic acid
• gluconic acid gluconic acid
• hydroxyethylidene diphosphonic acid examples include hydroxyethylidene diphosphonic acid.
• the deinking agent of the present embodiment may contain a composition for a deinking agent, or may be the composition for a deinking agent itself.
• the method for producing a deinked printed fabric in this embodiment is a method for producing a deinked printed fabric using the deinking agent described above.
• the method for producing a deinked printed fabric of this embodiment includes a deinking step of deinking the printed fabric by applying an external force to the printed fabric in the presence of the above-mentioned deinking agent to obtain a deinked printed fabric.
• the above-mentioned deinking agent causes the printed ink and/or the printed fabric to swell.
• the ink By applying external forces to the printed fabric, such as hitting, dropping, kneading, twisting, rubbing, pulling, colliding, or applying pressure (e.g., water pressure), the ink can be more effectively peeled off from the printed fabric, thereby improving the deinking properties.
• pressure e.g., water pressure
• the deinking step is a step in which the printed fabric is deinked by applying an external force to the printed fabric in the presence of the above-mentioned deinking agent to obtain a deinked printed fabric.
• the amount of deinking agent used is preferably 50 to 400 parts by weight, more preferably 75 to 300 parts by weight, per part by weight of printed fabric.
• the processing temperature in the deinking process is preferably 45 to 100°C, more preferably 50 to 95°C, even more preferably 60 to 95°C, and especially preferably 70 to 90°C.
• the processing time for the deinking process is preferably 1 to 60 minutes, and more preferably 10 to 45 minutes.
• the deinking process preferably involves a rotation process. Specifically, it is preferable to carry out the rotation process at 10 to 1,000 revolutions per minute, more preferably at 10 to 600 revolutions per minute, and even more preferably at 10 to 100 revolutions per minute.
• the deinking process is preferably carried out using a stirrer.
• the stirrer include a rounder meter, a stirrer, an industrial washing machine, a decolorizing/bleaching device, etc.
• the rounder meter and the stirrer are preferable as the stirrer.
• a launder meter is a device in which a container containing stainless steel balls rotates, stirring the liquid with the stainless steel balls.
• a stirrer is a device that uses magnetic force to rotate a magnetic rod called a rotor (agitator) inside a container to stir liquid.
• the diameter of the stainless steel ball is preferably 2 to 10 mm, more preferably 4 to 8 mm, and even more preferably 6 to 8 mm.
• the number of stainless steel balls is preferably 5 to 45, and more preferably 10 to 30.
• the rotor When using a stirrer in the deinking process, it is preferable for the rotor to be tapered.
• the tapered shape specifications are preferably 10 mm- ⁇ 4, 20 mm- ⁇ 7, 25 mm- ⁇ 8, or 30 mm- ⁇ 8.
• the deinking process is preferably a process in which the above-mentioned deinking agent, a contact body, and the printed fabric are mixed together, and an external force is applied by bringing the contact body into contact with the printed fabric. More specifically, it is preferable that this is a process in which a rounder meter is used, the above-mentioned deinking agent, stainless steel balls, and the printed fabric are mixed in the container of the rounder meter, and the stainless steel balls are brought into contact with the printed fabric to apply an external force, thereby obtaining a deinked printed fabric.
• the printed fabric is a fabric that is printed with an ink.
• the ink may be an ink containing a pigment. More specifically, the ink may be an ink containing a pigment dispersion, a binder resin, a wetting agent, an organic solvent, a pH adjuster, a viscosity adjuster, water, and a crosslinking agent.
• the ink may also contain a flame retardant. Examples of the flame retardant include halogen-based flame retardants, phosphorus-based flame retardants, metal hydroxide-based flame retardants, and antimony-based flame retardants.
• Materials for printed fabrics include polyester, acrylic, polyethylene, polypropylene, nylon, cotton, vinylal, vinylon, ethylene vinyl alcohol fiber, polyvinyl chloride, vinylidene, acrylic, modacrylic, acrylate, aramid, polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyarylate fiber, polylactic acid, polyurethane, fluorine fiber, polyimide, polyether ester elastomer, polyphenylene sulfide, alginate, elastodiene, elastoolefin, melamine fiber, polycarboamide, trivinyl, polybenzimidazole, chitin fiber, carbon fiber, glass fiber, metal fiber, ceramic fiber, rayon, polynosic, modal, lyocell, cupra, acetate, triacetate, promix, protein fiber, and blends of the above fibers.
• Applications for printed fabrics include advertising banners and curtains, clothing, sportswear, fashion items, bedding, household items such as interior decor, car seats, nonwoven fabrics, etc.
• the manufacturing method of the deinked printed fabric of this embodiment may include optional steps other than the above-mentioned [deinking step]. Such optional steps include a washing step of washing the deinked printed fabric obtained in the [deinking step].
• the washing step is a step of washing the deinked printed fabric obtained in the above-mentioned deinking step.
• a specific example of the washing step is a water washing step in which the deinked printed fabric obtained in the above-mentioned deinking step is washed with water.
• the water washing step may be performed while applying an external force. Examples of the external force include the same forces as those exemplified in the deinking process.
• the amount of water used varies depending on the external force applied, but is preferably 5,000 to 50,000 parts by mass, and more preferably 10,000 to 30,000 parts by mass, per part by mass of the printed fabric.
• test dyeing paste The components shown in Table 1 were mixed to prepare a test dyeing paste.
• a polyester pongee (T. Pongee HR white, manufactured by Saiho Chemical Industries Co., Ltd.) was attached to a bracket (made of chloroprene rubber, hardness 60, thickness 5 mm) and printed using a 135 mesh flat screen (2 cm x 4 cm rectangular pattern, 135 mesh, polyester screen, manufactured by Sanko Co., Ltd.) and a test dyeing paste with a squeegee (made of chloroprene rubber, hardness 70, accessory of MH-5 type). This was then dried at 100° C. for 1 minute using a dryer (MH-5, manufactured by Tsujii Senki Kogyo Co., Ltd.), and then heat-treated at 150° C.
• MH-5 manufactured by Tsujii Senki Kogyo Co., Ltd.
• the obtained printed fabric was cut into a 3 cm x 5 cm rectangle with the 2 cm x 4 cm rectangular pattern in the center to obtain a test printed fabric having a white area and a printed area.
• the printed side of the test printed fabric is considered to be the front side.
• a deinking agent (deinking agent composition) was prepared by mixing the basic compound, surfactant, and water shown in Tables 2 and 3.
• the deinking step and the water washing step were carried out under the conditions shown in Tables 4 and 5 to produce deinked printed fabric.
• Five test printed fabrics were used.
• the water rinsing step was carried out by spraying 10,000 mL of tap water in a shower-like manner after the deinking step onto five pieces of printed test fabric.
• 10,000 mL of tap water was poured onto five test printed fabrics, and the fabrics were washed with water while being rubbed against each other.
• the "amount of deinking agent used" in Tables 4 and 5 is the amount per part by mass of the test printed fabric.
• the equipment used in the test is as follows: ⁇ Rounder meter (L-16Z-T, manufactured by Daiei Scientific Instruments Co., Ltd.) Built-in cup volume: 550mL
• the operating condition means the rotation speed of the container if a rounder meter is used, and means the rotation speed of the stirrer tip if a stirrer is used.
• the evaluation criteria for deinking property were as follows, and the evaluation was carried out on both the front and back sides of the test printed fabric.
• the evaluation criteria are based on "JIS L 0804 2004, Gray Scale for Discoloration". There are nine levels of evaluation, with a smaller value indicating that more deinking has been done and that the deinking properties are better.
• the evaluation criteria for white ground staining are as follows. The evaluation criteria are based on "JIS L 0805 2005, Gray Scale for Contamination.” There are nine levels of evaluation, with a higher value indicating less white ground contamination and less white ground contamination.

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• 2024
  • 2024-11-15 WO PCT/JP2024/040668 patent/WO2025105478A1/ja active Pending
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