Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
  • G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
  • G01N31/223—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating presence of specific gases or aerosols
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
  • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
  • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
  • G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
  • G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
  • G01N31/223—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating presence of specific gases or aerosols
  • G01N31/224—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating presence of specific gases or aerosols for investigating presence of dangerous gases
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
  • G01N33/0004—Gaseous mixtures, e.g. polluted air
  • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
  • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
  • G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
  • G01N33/004—CO or CO2
• • 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
  • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
  • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
  • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

• the present invention relates to a carbon dioxide gas detector.
• the packaging container is filled with an inert gas or the like that does not react with the contents.
• Carbon dioxide carbon dioxide
• carbon dioxide gas is also enclosed in the storage of foods, beverages, and chemicals that may deteriorate in quality or lose their medicinal properties due to the release of carbon dioxide gas.
• the carbon dioxide concentration inside may decrease due to damage to the packaging container, which may lead to deterioration of the contents.
• a bicarbonate-containing chemical solution is a chemical having the property of releasing carbon dioxide gas and losing its medicinal effect. Therefore, by packaging the container containing the bicarbonate-containing chemical solution together with carbon dioxide in a gas barrier packaging container, the container is stored while preventing the release of carbon dioxide.
• a pinhole or seal failure occurs due to a defect in the packaging material itself, a failure in encapsulating the contents, transportation such as distribution, impact at home or hospital, etc., the atmosphere of gas replacement packaging will be created. It may change and the contents may be altered, and there is a risk that the gas-replaced packaging may be distributed without being noticed by the change in the atmosphere.
• a detector that detects carbon dioxide gas is enclosed in the packaging container at the same time as carbon dioxide gas, and the presence of carbon dioxide gas can be more easily and accurately detected. Consideration is being made to confirm.
• Patent Document 1 discloses a carbon dioxide detection agent package having a breathable base material as a package of a detection agent that does not require work during use and does not have a risk of scattering the contents.
• Patent Document 2 includes a pH indicator and a water-retaining agent as carbon dioxide detectors that discolor even in a low-concentration carbon dioxide atmosphere and can visually determine the generation of carbon dioxide, so that the pH indicator exhibits an alkaline color.
• a carbon dioxide gas detector in which a base material impregnated with an alkaline aqueous solution adjusted to a pH is sealed in a pouch having a specific water vapor permeability.
• Patent Document 3 discloses a carbon dioxide gas detection ink containing a pH indicator, a binder and a solvent as a carbon dioxide gas detection ink composition capable of easily visually recognizing a color change.
• Patent Documents 1 and 2 describe a particulate detection agent, a highly fluid particulate detection agent is required from the viewpoint of a more complicated shape and productivity. Further, since it depends on the hue change of the aqueous solution of the pH indicator soaked in the packaging container and the carrier, there is also a problem that it takes time to visually recognize the hue change after the carbon dioxide gas concentration actually decreases.
• the carbon dioxide detection agent of Patent Document 3 has the ability to discolor and determine the leakage of carbon dioxide when the carbon dioxide concentration decreases, but conversely, carbon dioxide is generated from the state where there is no carbon dioxide. I can't confirm that. Therefore, it is an object of the present invention to provide a carbon dioxide gas detector capable of detecting a decrease and an increase in carbon dioxide gas concentration in a short time and having excellent fluidity.
• the present inventors have impregnated a carrier with an ink composition containing a pH indicator, an alkaline agent, a water retention agent and water, and a carbon dioxide gas detector containing a specific amount of water.
• an ink composition containing a pH indicator, an alkaline agent, a water retention agent and water, and a carbon dioxide gas detector containing a specific amount of water.
• the present invention provides the following [1] to [10].
• the water retention agent is at least one selected from the group consisting of polyhydric alcohol, polyalkylene glycol, acrylic polymer and cellulose.
• a packaging body characterized in that the carbon dioxide gas detector according to any one of the above [1] to [7] is arranged inside an exterior body filled with a gas containing carbon dioxide gas.
• a bicarbonate-containing infusion solution in which the carbon dioxide gas detector and the bicarbonate-containing infusion solution according to any one of [1] to [7] above are placed in an exterior body filled with a gas containing carbon dioxide gas. Preservation method.
• the present invention it is possible to detect a decrease and increase in carbon dioxide concentration in a short time, and it is possible to provide a carbon dioxide detector having excellent fluidity.
• the carbon dioxide gas detector of the present invention is a carbon dioxide gas detector in which a carrier is impregnated with an ink composition containing a pH indicator, an alkaline agent, a water retention agent and water, and the water content of the carbon dioxide gas detector is 30. ⁇ 40% by mass.
• the ink composition contained in the carbon dioxide gas detector contains a pH indicator, an alkaline agent, a water retention agent, and water.
• the pH indicator is used to detect carbon dioxide. By utilizing the pH change due to the neutralization reaction of alkali with carbon dioxide gas, carbon dioxide gas can be clearly detected even in a low concentration region.
• the pH indicator used in the carbon dioxide detector of the present invention is preferably an indicator having a discoloration range of neutral to alkaline, more preferably an indicator having a discoloration range of pH 7.0 to 10.0, and pH 7.2 to 9. An indicator having a discoloration range of 6 is more preferable. Further, an indicator that changes to a clearly different color so that a clear judgment can be made is preferable. Further, an indicator having high thermal stability is preferable so that it can be used even at a high temperature.
• Examples of the pH indicator having a neutral to alkaline discoloration range include phenol red, cresol red, curcumin, cyanine, ⁇ -naphtholphthalein, metacresol purple, thymol blue, o-cresol phthalein, and phenolphthalein. .. These can be used alone or in combination of two or more, but when they are combined, it is preferable to combine those that change in hue of the same system.
• the pH indicator is metacresol purple because the color change range is alkaline and the color changes from purple to yellow at pH 9.0, the color change is large, and the chemical stability is high. Is preferable.
• the amount of the pH indicator is preferably an amount that is clearly colored and the color change can be visually confirmed, preferably 0.001 to 0.1% by mass, and 0.005 to 0.05 in the ink composition. More preferably by mass. Further, 0.0005 to 0.05% by mass is preferable, and 0.001 to 0.01% by mass is more preferable in the carbon dioxide gas detector.
• the ink composition used in the carbon dioxide gas detector of the present invention contains an alkaline agent.
• the alkaline agent is preferably a compound having high solubility in water.
• the alkaline agent include metal phosphates, metal hydroxides, silicates, sulfites, metal carbonates and the like, preferably metal phosphates and metal hydroxides, with metal phosphates being more preferred. preferable.
• Metal phosphates and metal hydroxide salts are preferable because they have particularly high solubility in water.
• the metal phosphate trisodium phosphate is preferable.
• the metal hydroxide salt include sodium hydroxide and potassium hydroxide, and sodium hydroxide is preferable.
• the amount of the alkaline agent is preferably adjusted according to the pH of the aqueous solution, but is preferably 0.02 to 1.0% by mass, more preferably 0.1 to 0.5% by mass in the ink composition. Further, in the carbon dioxide gas detector, 0.01 to 0.5% by mass is preferable, and 0.05 to 0.2% by mass is more preferable.
• the ink composition used for the carbon dioxide gas detector of the present invention contains a water retention agent.
• the type of the water retention agent is not particularly limited as long as it has an effect of lowering the water activity when added to the carbon dioxide gas detector, but the following can be preferably used.
• the water retention agent is preferably at least one selected from the group consisting of polyhydric alcohols, polyalkylene glycols, acrylic polymers and cellulose, and polyhydric alcohols are more preferable.
• the polyhydric alcohol include glycerin, ethylene glycol, propylene glycol and the like, and among these, glycerin is preferable.
• Examples of the polyalkylene glycol include polyethylene glycol and the like.
• the acrylic polymer include polyacrylic acid salts and polyacrylic acid esters.
• the amount of the water retention agent is preferably 10 to 70% by mass, more preferably 20 to 60% by mass in the ink composition from the viewpoint of speeding up the detection of the carbon dioxide concentration and effectively reducing the water activity. Further, in the carbon dioxide gas detector, 5 to 50% by mass is preferable, and 10 to 40% by mass is more preferable.
• the water content is preferably 40 to 75% by mass, more preferably 50 to 65% by mass in the ink composition from the viewpoint of speeding up the detection of the carbon dioxide concentration. Further, in the carbon dioxide gas detector, it is 30 to 40% by mass, preferably 32 to 40% by mass, more preferably 34 to 40% by mass, further preferably 36 to 40% by mass, and more preferably 36 to 39.5% by mass. More preferred.
• the mass ratio of water to the water retention agent is preferably 1.0 to 2.0, preferably 1.2 to 1.9, from the viewpoint of speeding up the detection of carbon dioxide concentration. Is more preferable.
• the mass ratio of water to the water retention agent in the above range, it is possible to obtain a carbon dioxide gas detector having no unevenness during the production of the carbon dioxide gas detector.
• the mixture is sufficiently mixed, and a uniform particulate carbon dioxide gas detector is obtained.
• the mass ratio of water to the carrier (water / carrier), which will be described later, is preferably 0.5 to 2.0, preferably 0.7, from the viewpoint of speeding up the detection of carbon dioxide concentration and improving the fluidity. More preferably, it is ⁇ 1.0.
• the carbon dioxide gas detector of the present invention is obtained by impregnating a carrier with the ink composition, and by impregnating the carrier with a particle shape, the fluidity becomes excellent.
• a carrier porous particles are preferable, and porous inorganic particles are more preferable.
• the porous inorganic particles include silica gel, diatomaceous earth, zeolite, and porous silicate, and porous silicate is preferable.
• the porous silicates magnesium aluminometasilicate is preferable because it is suitable for use in foods and pharmaceuticals.
• the carrier is preferably colorless or white so that the color change becomes clear.
• the pH of the carrier is preferably neutral to alkaline.
• the average particle size of the carrier is preferably 1 to 500 ⁇ m, more preferably 100 to 300 ⁇ m, from the viewpoint of fluidity and compoundability.
• the shape of the carrier is preferably spherical or substantially spherical, and more preferably spherical.
• the amount of the carrier is preferably 20 to 70% by mass, more preferably 30 to 60% by mass in the carbon dioxide detector from the viewpoint of speeding up the detection of the carbon dioxide concentration and improving the fluidity.
• the carbon dioxide detector of the present invention preferably contains a spreading agent from the viewpoint of improving fluidity while maintaining the clarity of hue change.
• the spreading agent is preferably adhered to the outer surface of the carrier impregnated with the ink composition.
• the spreading agent is preferably spherical fine particles, more preferably silica, and even more preferably hydrophobic silica.
• the amount of the spreading agent is preferably 0.1 to 5% by mass, more preferably 0.2 to 2% by mass in the carbon dioxide gas detector from the viewpoint of improving the fluidity.
• the carbon dioxide gas detector of the present invention is in the form of highly fluid particles and can be used as it is depending on the intended use, but it is preferably packaged, stored and used.
• the packaging form include a bag shape and a box shape, but a bag shape is preferable.
• the material used for packaging it is preferable to use a transparent resin film as the packaging material in order to visually confirm the change in color from the outside and determine the presence or absence of carbon dioxide gas.
• Preferred packaging materials include biaxially stretched polypropylene (OPP), unstretched polypropylene (CPP), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE), polyethylene terephthalate (PET). , Polyvinyl alcohol (PVA), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), stretched polyamide (ONY) and the like.
• vents are preferably vents that allow carbon dioxide to pass through without passing through the carbon dioxide detector of the present invention, preferably filaments or vents formed by a fine porous film, depending on the filaments. It is more preferable that the vents are formed. Examples of the porous membrane include non-woven fabrics and the like.
• a part of the filamentous material exists inside the package (carbon dioxide detector accommodating portion), and a part thereof reaches the outside of the package. When the filament forms a vent, it is breathable by the space between the fibers that make up the filament or between the fibers and the material used for packaging.
• the filamentous material may be an aggregate of fibrous materials and has a filamentous shape, and preferably has a melting point of 80 ° C. or higher so as to withstand molding of the package.
• a sewing thread is preferably used.
• the material of the filament include polyethylene terephthalate, cotton, polyester, vinylon, silk, nylon and the like, but polyethylene terephthalate, nylon and vinylon are preferable.
• the thickness of the thread is preferably 1 to 100, more preferably 10 to 80, and even more preferably 15 to 60.
• the method for producing the carbon dioxide gas detector of the present invention is not limited, but it is preferably produced by impregnating the carrier with an ink composition containing a pH indicator, an alkaline agent, a water retention agent and water. More preferably, it is produced by impregnating a carrier with an ink composition containing an alkaline agent, a water retaining agent and water, and then mixing with a spreading agent.
• the carrier In order to uniformly impregnate the carrier with the ink composition, it is preferable to stir using a mixer. Further, in order to uniformly adhere the spreading agent around the carrier, it is preferable to stir using a mixer. As the conditions for stirring, it is preferable to stir at a speed of 10 to 40 rpm.
• the package of the present invention is characterized in that the carbon dioxide detector is placed inside an exterior body filled with a gas containing carbon dioxide. That is, in the package of the present invention, the carrier is impregnated with an ink composition containing a pH indicator, an alkaline agent, a water retention agent and water, and a carbon dioxide gas detector having a water content of 30 to 40% by mass is carbonated. It is characterized in that it is placed inside an exterior body filled with gas containing gas.
• the packaged body of the present invention contains a gas containing carbon dioxide gas inside the packaged body, that is, inside the outer body, and the carbon dioxide gas detector, but also contains chemicals, foods, and the like as contents in the outer body.
• the contents such as chemicals and foods are preferably further stored in a container, and the container is preferably arranged inside the exterior.
• the exterior body used in the packaging body of the present invention is preferably made of a gas barrier material that does not easily allow gas containing carbon dioxide to permeate.
• a gas barrier material that does not easily allow gas containing carbon dioxide to permeate.
• a part of the exterior body is transparent in order to visually recognize the hue change of the carbon dioxide gas detector from the outside of the exterior body.
• the gas containing carbon dioxide gas may be composed of only carbon dioxide gas, or may be composed of carbon dioxide gas and an inert gas.
• the concentration of carbon dioxide in the gas containing carbon dioxide is preferably 1 to 50%.
• Examples of the contents arranged in the package of the present invention include chemicals, foods, etc., and specific examples thereof include chemicals containing hydrogencarbonates such as sodium hydrogencarbonate, fruits and vegetables, raw meat, and confectionery.
• a bicarbonate-containing infusion solution when used as the chemical solution, it can be used early or moved to a carbon dioxide atmosphere and stored by detecting the carbon dioxide concentration in a short time by the carbon dioxide detector. This is preferable because it can suppress product deterioration.
• the carbon dioxide gas detector and the bicarbonate-containing infusion solution are placed inside an exterior body filled with a gas containing carbon dioxide gas. That is, in the method for preserving a bicarbonate-containing infusion solution of the present invention, a carrier is impregnated with an ink composition containing a pH indicator, an alkaline agent, a water-retaining agent, and water, and carbon dioxide gas having a water content of 30 to 40% by mass is used. The detector and the bicarbonate-containing infusion solution are placed inside an exterior body filled with a gas containing carbon dioxide gas.
• the bicarbonate-containing infusion solution is used as an extracellular fluid replenisher, and is used to correct the extracellular fluid using bicarbonate ion as an alkalizing agent.
• Bicarbonate-containing infusions have the property of releasing carbon dioxide and losing their medicinal properties. Therefore, by packaging the container containing the bicarbonate-containing infusion solution together with carbon dioxide in a gas barrier packaging container, the container is stored while preventing the release of carbon dioxide.
• the carbon dioxide gas detector can be used to detect a decrease in the carbon dioxide gas concentration in the gas in a short time, and thus deteriorate. It is preferable because the bicarbonate-containing infusion solution, which is easy to use, can be used up at an early stage and can be stored again in a carbon dioxide gas atmosphere, and deterioration of the bicarbonate-containing infusion solution can be efficiently prevented.
• an exterior body used in the storage method of the present invention it is preferable to use an exterior body that can be suitably used in the above-mentioned package.
• it is preferably composed of a gas barrier material that does not easily allow gas containing carbon dioxide to permeate.
• resin films such as ethylene-vinyl alcohol copolymer, polyethylene terephthalate, and nylon, and these. Examples thereof include a composite film in which silica, alumina and the like are vapor-deposited on a resin film.
• the gas containing carbon dioxide gas is preferably composed of carbon dioxide gas and nitrogen gas.
• the concentration of carbon dioxide in the gas containing carbon dioxide is preferably 1 to 50%, more preferably 1 to 15%, still more preferably 3 to 10%.
• the storage temperature of the storage method of the present invention is preferably 5 to 40 ° C.
• the storage method of the present invention exerts a higher effect when moving or transporting a bicarbonate-containing infusion solution. That is, a method for moving or transporting the bicarbonate-containing infusion solution, in which the carbon dioxide gas detector and the bicarbonate-containing infusion solution are arranged in an outer body filled with a gas containing carbon dioxide gas, is also preferable.
• a method for moving or transporting the bicarbonate-containing infusion solution in which the carbon dioxide gas detector and the bicarbonate-containing infusion solution are arranged in an outer body filled with a gas containing carbon dioxide gas, is also preferable.
• the exterior body is often damaged by an external stimulus or an external impact, which cannot be visually determined.
• the carbon dioxide gas detector reduces the carbon dioxide gas concentration.
• the bicarbonate-containing infusion solution with damaged exterior can be used up early and can be stored again in a carbon dioxide gas atmosphere, making it possible to efficiently deteriorate the bicarbonate-containing infusion solution. It is preferable because it can be prevented.
• the carbon dioxide detectors obtained in Examples and Comparative Examples were evaluated as follows. ⁇ Detection evaluation of carbon dioxide concentration (detection time / hue change)> The detection of carbon dioxide concentration was evaluated as follows. (Creation of carbon dioxide detector packaging) 0.2 g of the carbon dioxide detector obtained in Examples and Comparative Examples was placed in a bag (with a ventilation thread) made of a 2.5 cm ⁇ 3.0 cm transparent laminated film of OPP / LLDPE, and the opening was heat-sealed. Then, it was sealed and a package of a carbon dioxide gas detector was obtained.
• Liquidity was evaluated as follows. The angle of repose of the carbon dioxide detector was measured with a powder measuring instrument (PT-X manufactured by Hosokawa Micron Co., Ltd.). The smaller the angle of repose, the better the fluidity.
• Example 1 A purple ink composition was obtained by mixing 0.016 g of metacresol purple, which is a pH indicator, 0.25 g of trisodium phosphate 12hydrate, which is an alkaline agent, and 59.5 g of glycerin, which is a water retention agent, with 83 g of distilled water. rice field. 142.7 g of this ink composition was impregnated with 100 g of magnesium aluminometasilicate (trade name: Neucillin SG2, average particle size: about 200 ⁇ m) as a carrier, 0.75 g of hydrophobic silica was added, and the mixture was stirred. A purple carbon dioxide detector was obtained. The evaluation results are shown in Table 1.
• Examples 2-3 and Comparative Examples 1-2 A purple carbon dioxide detector was obtained in the same manner as in Example 1 except that the amount of distilled water was changed as shown in Table 1. The evaluation results are shown in Table 1.
• Example 4 A purple carbon dioxide detector was obtained in the same manner as in Example 1 except that hydrophobic silica was not used. The evaluation results are shown in Table 1.
• the carbon dioxide detector of Comparative Example 1 had a low sensitivity to decrease in carbon dioxide concentration, and in particular, no change was observed even after 15 hours in the evaluation by the color chart. Further, the carbon dioxide detector of Comparative Example 2 had a large angle of repose and was inferior in fluidity. On the other hand, it can be seen that the carbon dioxide detector of the example can detect the decrease and increase of the carbon dioxide concentration in a short time and is excellent in fluidity.

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• 2021
  • 2021-04-12 CN CN202180029400.3A patent/CN115427803A/zh active Pending
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