Thermal insulation material, and method for manufacturing thermal insulation material

Abstract

To provide an insulating material that has sufficient thermal insulation properties and superior mold resistance compared to conventional materials. [Solution] An embodiment of the present invention, the thermal insulation material 10, comprises a base material 20 made of a plurality of polyester short fibers, and a coating layer 30 formed near at least one outer surface of the base material 20 and coated with a predetermined antibacterial and antifungal active ingredient, wherein the base material 20 has a plurality of fiber masses 50 in which a plurality of short fibers are intertwined in a granular manner, and the coating layer 30 is disposed near at least one outer surface of the base material 20 and includes a plurality of fiber masses 50 having short fibers coated with a predetermined antibacterial and antifungal active ingredient.

Description

[Technical Field]

[0001] This invention relates to a residential insulation material that not only has sufficient thermal insulation properties but also excellent mold resistance, and to a method for manufacturing such an insulation material. [Background technology]

[0002] Conventionally, as a thermal insulation material for houses, there have been materials made of polyester fibers as an alternative to glass wool, rock wool, etc., due to environmental concerns. Specifically, there have been thermal insulation materials for houses made of polyester fibers, which are fiber laminates formed from polyester fibers and core-sheath composite fibers, which are composed of a core component made of polyester fibers, etc., and a sheath component made of low-melting-point polyester fibers, etc., that has a lower melting point than the core component (see, for example, Patent Document 1). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Patent No. 4189986 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] However, conventional insulation materials made of glass wool, rock wool, etc., while providing sufficient insulation, had a problem where condensation from indoor heating and cooling would remain between the fibers, creating a breeding ground for mold. Similarly, conventional residential insulation materials made of polyester fibers, while providing sufficient insulation, were also susceptible to mold growth due to condensation trapped between the fibers because they are composed of hydrophobic polyester fibers. Furthermore, since general residential insulation materials are installed inside the walls of a house, it is difficult to remove mold that has grown on the insulation once the house is built. In short, there was a need for insulation materials that not only provided sufficient insulation but also had superior mold resistance compared to conventional materials, as well as a method for manufacturing such insulation materials.

[0005] This invention has been made in view of these problems, and one of its objectives is to provide an insulating material that has sufficient thermal insulation properties and is more mold-resistant than conventional materials, as well as a method for manufacturing the insulating material. [Means for solving the problem]

[0006] The present invention has been made to solve at least some of the above-mentioned problems and can be realized in the following examples of applications. The reference numerals and supplementary explanations in parentheses in this section are provided to aid in understanding the present invention and indicate its correspondence with the embodiments described later; they do not limit the present invention in any way.

[0007] An example of an application of the present invention is an insulating material (10,100) comprising a base material (20,120) made of a plurality of polyester short fibers, and a coating layer (30,130) made of a plurality of the short fibers formed near at least one outer surface of the base material and coated with a predetermined antibacterial and antifungal active ingredient.

[0008] Furthermore, in the thermal insulation material of the above-described application example, the base material may have a plurality of fiber masses in which a plurality of short fibers are intertwined in a granular manner, and the coating layer may be disposed near at least one outer surface of the base material and include the plurality of fiber masses (50) having the short fibers coated with the active ingredient of the predetermined antibacterial and antifungal agent. Moreover, in the thermal insulation material of the above-described application example, the coating layer may be located 1 m on at least one outer surface of the base material. 2 Each may be coated with 1.56 ml or more and less than 31.11 ml of the specified antibacterial and antifungal active ingredient.

[0009] A method for manufacturing a thermal insulation material (10,100) as an application example of the present invention comprises a base material (20,120) made of short polyester fibers and a coating layer (30,130) made of the short fibers coated with a predetermined antibacterial and antifungal active ingredient, wherein the method comprises: a fiber sheet forming step (step S30) in which a fiber sheet is formed by shaping a plurality of the short fibers into a sheet; an additive spraying step (step S40) in which an additive containing the predetermined antibacterial and antifungal agent is sprayed onto at least one outer surface of the fiber sheet formed in the fiber sheet forming step to impregnate the fiber sheet with the predetermined antibacterial and antifungal agent; and a heat treatment step (step S50) in which heat is applied to the outer surface of the fiber sheet to which the additive was sprayed in the additive spraying step to dry the impregnated predetermined antibacterial and antifungal agent and form the coating layer, and to weld a portion of the short fibers to form the base material.

[0010] Furthermore, in the method for manufacturing the thermal insulation material of the above-described application example, the fiber sheet forming step may be carried out by arranging a plurality of fiber clumps, in which a plurality of short fibers are intertwined in a granular manner, in a three-dimensional manner to form the fiber sheet. Moreover, in the method for manufacturing the thermal insulation material of the above-described application example, the additive spraying step may be carried out by spraying at least one outer surface of the fiber sheet 1 m 2 The additive may be sprayed so as to impregnate it with 1.56 ml or more but less than 31.11 ml of the specified antibacterial and antifungal active ingredient per unit. [Brief explanation of the drawing]

[0011] [Figure 1] (A) is an overall view showing the schematic configuration of the first embodiment of the thermal insulation material 10, which is an example of an embodiment, and (B) is an enlarged view of a part of the cross-section of the thermal insulation material 10. [Figure 2] This is a flowchart illustrating the manufacturing method of the thermal insulation material 10. [Figure 3-1] This table explains the results of the mold resistance tests for each of the six test specimens. [Figure 3-2]This is a table for explaining the results of the flame retardancy test for each of six types of test specimens. [Figure 4] (A) is an overall view showing a schematic configuration of the heat insulating material 100 of the second embodiment which is an example of an embodiment, and (B) is an enlarged view of a part of the cross section of the heat insulating material 100.

Embodiments for Carrying out the Invention

[0012] Hereinafter, embodiments to which the present invention is applied will be described with reference to the drawings. Note that the embodiments of the present invention are not limited to the following embodiments, and various forms can be adopted as long as they belong to the technical scope of the present invention.

[0013] <Explanation Regarding the Configuration of the Heat Insulating Material 10 of the First Embodiment> Referring to FIG. 1, first, the configuration of the heat insulating material 10 of the first embodiment which is an example of an embodiment to which the present invention is applied will be described. FIG. 1(A) is an overall view showing a schematic configuration of the heat insulating material 10 of the first embodiment which is an example of an embodiment, and FIG. 1(B) is an enlarged view of a part of the cross section of the heat insulating material 10.

[0014] As shown in FIG. 1(A), the heat insulating material 10 is a sheet-like material having a predetermined thickness, including a base material 20 formed of a plurality of short fibers made of polyester, and a coating layer 30 formed near the outer surface (each of the two opposing outer surfaces) of the base material 20 and composed of a plurality of short fibers coated with an active ingredient of a predetermined antibacterial and antifungal agent. The plurality of short fibers made of polyester are two or more types of short fibers made of flame-retardant polyester coated with silicon and having different melting points. Specifically, they are high-melting-point polyester short fibers which are polyester short fibers with a melting point of 150 to 300°C, and low-melting-point polyester short fibers which are polyester short fibers with a melting point of 100 to 150°C. Also, the short fibers are within the range of a fiber length of 2 to 100 mm and a fineness (thickness) of 1 to 40 denier. Note that the short fibers are coated with 0.0001 to 1 part by mass of silicon with respect to 100 parts by mass of the short fibers, and due to the high slipperiness of the short fibers, they are likely to tangle into granules.

[0015] As shown in FIG. 1(B), the base material 20 in the heat insulating material 10 is formed of a plurality of fiber masses 50 in which a plurality of short fibers are entangled in a granular (substantially spherical) shape. Each of the plurality of fiber masses 50 is three-dimensionally entangled by a part of the short fibers protruding around the fiber mass 50 and is heat-welded by the low-melting-point polyester short fibers contained therein. That is, since the base material 20 is formed by three-dimensionally entangling a plurality of fiber masses 50, it has a structure in which voids are formed between the plurality of fiber masses 50. Also, in the fiber mass 50 forming the base material 20, since a plurality of short fibers are three-dimensionally entangled, it has a structure in which voids are formed between the plurality of short fibers.

[0016] Further, the fiber mass 50 has a core portion in which short fibers are densely entangled, and the average particle diameter (the average particle diameter in the granular portion excluding the short fibers protruding around the fiber mass 5) may be 1 to 50 mm, and particularly preferably 3 to 20 mm. Also, in the fiber mass 50, 1 to 40% by mass of the above-described low-melting-point polyester short fibers are contained, and this low-melting-point polyester short fiber functions as a binder between a plurality of short fibers (such as a plurality of high-melting-point polyester short fibers) and between a plurality of fiber masses 50 by heat welding.

[0017] Furthermore, the coating layer 30 is a plurality of fiber masses 50 disposed in the vicinity of the outer surface of the base material 20 and having short fibers coated with an active ingredient of a predetermined antibacterial and antifungal agent. That is, it is formed of a plurality of fiber masses 50 at least a part of which is coated with an active ingredient of a predetermined antibacterial and antifungal agent. In the coating layer 30, per 1 m of the outer surface of the base material 20, it is coated with 1.56 ml or more and less than 31.11 ml of an active ingredient of a predetermined antibacterial and antifungal agent, preferably coated with 3.11 ml or more and less than 31.11 ml of an active ingredient of a predetermined antibacterial and antifungal agent, and more preferably coated with 1.56 ml or more and 29.56 ml or less or 3.11 ml or more and 29.56 ml or less of an active ingredient of a predetermined antibacterial and antifungal agent. 2 around, it is coated with 1.56 ml or more and less than 31.11 ml of an active ingredient of a predetermined antibacterial and antifungal agent, preferably coated with 3.11 ml or more and less than 31.11 ml of an active ingredient of a predetermined antibacterial and antifungal agent, and more preferably coated with 1.56 ml or more and 29.56 ml or less or 3.11 ml or more and 29.56 ml or less of an active ingredient of a predetermined antibacterial and antifungal agent.

[0018] Here, a specified antibacterial and antifungal agent for the coating layer 30 of the insulation material 10 will be described. The specified antibacterial and antifungal agent consists of antibacterial and antifungal active ingredients, the active ingredient being diiodomethyl-p-trisulfone, with a pH of 3.0 to 7.0, a specific gravity of 1.0 ± 0.1, and an appearance adjusted to be transparent to cloudy white or light yellowish-brown. Furthermore, this specified antibacterial and antifungal agent may also contain poly[guanidine-N,N'-diylhexane-1,6-diylimino(iminomethylene)] hydrochloride as an additional antibacterial and antifungal active ingredient. A commercially available specified antibacterial and antifungal agent is "Pacific Beam Mold Water" ("Pacific Beam" is a registered trademark) manufactured by Pacific Beam Co., Ltd.

[0019] Furthermore, the coating layer 30 may have short fibers coated not only with the specified antibacterial and antifungal active ingredients mentioned above, but also with the specified flame retardant active ingredients; in other words, it may be formed of multiple fiber masses 50, at least a portion of which are coated with the specified antibacterial and antifungal active ingredients and the specified flame retardant active ingredients. Therefore, in the coating layer 30, the outer surface of the base material 20 is 1 m 2 The material may be coated with 15.56 ml or more of the specified flame retardant active ingredient, and more preferably, with 46.66 ml or more of the specified flame retardant active ingredient.

[0020] Here, a specified flame retardant in the coating layer 30 of the thermal insulation material 10 will be described. The specified flame retardant consists of a water-soluble flame-retardant active ingredient. For example, one specified flame retardant has a flame-retardant active ingredient that is a guanidine compound, has a pH of approximately 5.5, a specific gravity of approximately 1.27 g / ml, and is adjusted to be colorless and slightly turbid in appearance.

[0021] <Explanation of the manufacturing method for insulation material 10> Referring to Figure 2, the manufacturing method of the thermal insulation material 10 of this embodiment will now be described. Figure 2 is a flowchart illustrating the manufacturing method of the thermal insulation material 10.

[0022] As shown in Figure 2, the method for manufacturing the heat insulating material 10 involves sequentially performing the following steps: a fiber mixing step (step S10) of mixing high-melting-point polyester short fibers and low-melting-point polyester short fibers; a fiber mass forming step (step S20) of forming multiple fiber masses 50 by shaping multiple short fibers into granules; a fiber mass sheet forming step (step S30) of forming a fiber mass sheet by stacking the multiple fiber masses 50 three-dimensionally into a sheet; an additive spraying step (step S40) of impregnating the fiber mass sheet with a predetermined antibacterial and antifungal agent by spraying an additive containing a predetermined antibacterial and antifungal agent onto a predetermined outer surface of the fiber mass sheet; and a heat treatment step (step S50) of forming the heat insulating material 10, which is a base material 20 on which a coating layer 30 is formed, by heat treating the fiber mass sheet impregnated with the predetermined antibacterial and antifungal agent.

[0023] In the fiber mixing step S10, a sliver made of high-melting-point polyester staple fibers and a sliver made of low-melting-point polyester staple fibers are opened, and the opened high-melting-point polyester staple fibers and the multiple low-melting-point polyester staple fibers are mixed in a fiber mixing device (not shown) to form a mixed staple fiber consisting of multiple high-melting-point polyester staple fibers and multiple low-melting-point polyester staple fibers. The fiber mixing device has a container equipped with blades, and mixes the two types of staple fibers by stirring with the blades inside the container.

[0024] In the fiber mass forming process of step S20, a predetermined amount of mixed short fibers is formed in a fiber mass forming device (not shown) to form multiple granular fiber masses 50. The fiber mass forming device has a truncated cone-shaped container that can create spiral / tornado-like convection of air inside the container. Mixed short fibers are introduced into the container from above and rotated three-dimensionally by the air convection, causing a predetermined amount of mixed short fibers to roll up while coming into contact with the inner wall of the container, thereby forming granular fiber masses 50.

[0025] In the fiber mass sheet formation process of step S30, a sheet-like fiber mass sheet is formed by arranging multiple fiber masses 50 three-dimensionally using a fiber mass arrangement device (not shown) and forming them into a sheet. The fiber mass arrangement device has two rotatable rollers, and multiple fiber masses 50 fed between the two rollers, which rotate in opposite directions, are pushed out from between the two rollers, thereby arranging the multiple fiber masses 50 three-dimensionally and forming a sheet-like fiber mass sheet.

[0026] In the additive spraying step S40, an aqueous solution (additive) containing a predetermined antibacterial and antifungal agent is sprayed onto each of the two outer surfaces of the fiber mass sheet using a sprayer (not shown), thereby forming an impregnation layer on each of the two outer surfaces of the fiber mass sheet in which the predetermined antibacterial and antifungal agent has been impregnated. The sprayer can spray a predetermined amount of the aqueous solution (additive) containing the predetermined antibacterial and antifungal agent onto one outer surface of the fiber mass sheet moving at a predetermined speed by a conveyor (not shown). Specifically, an aqueous solution containing the above-mentioned predetermined antibacterial and antifungal agent at a concentration of 1.0% or more is sprayed onto the outer surface of the fiber mass sheet at a concentration of 1.0% or more. 2 156 ml (155.56 ml) or more per sheet (the active ingredient of the specified antibacterial and antifungal agent is contained within 1 m of the outer surface of the fiber sheet) 2 Spray at a rate of 1.56 ml (1.5556 ml) or more per unit. Note that the aqueous solution containing the predetermined antibacterial and antifungal agent sprayed in the additive spraying step S40 may contain various concentrations, such as 2.0% or more, and the active ingredient of the predetermined antibacterial and antifungal agent is distributed over 1 m of the outer surface of the fiber mass sheet. 2 The spray should be applied in an amount of 1.56 ml (1.5556 ml) or more per unit. In addition, the additive may contain not only the specified antibacterial and antifungal agents, but also the specified flame retardants at a concentration of 10% or more.

[0027] In the heat treatment step S50, the fiber mass sheet, on which a predetermined antibacterial and antifungal agent impregnation layer has been formed, is heat-treated with a heater (not shown) of a heating device. This dries the predetermined antibacterial and antifungal agent (predetermined flame retardant) impregnated in the impregnation layer, forming a coating layer 30, and heat-welds multiple fiber masses 50 together to form a base material 20 and thus a heat insulating material 10. In other words, the heating device heats the fiber mass sheet with a heater to a temperature (100-150°C) that can melt the low-melting-point polyester short fibers contained in the fiber mass sheet. This dries the aqueous solution of the predetermined antibacterial and antifungal agent impregnated in the impregnation layer, and heat-welds multiple fiber masses 50 together, thereby heat-welding multiple short fibers coated with the active ingredient of the predetermined antibacterial and antifungal agent, and multiple fiber masses 50 coated with the active ingredient of the predetermined antibacterial and antifungal agent. Although the coating layer 30 formed in the heat treatment step S50 is said to be formed from multiple short fibers or multiple fiber masses 50 coated with the active ingredient of a predetermined antibacterial and antifungal agent, it is also possible that short fibers impregnated with an aqueous solution of the predetermined antibacterial and antifungal agent, or fiber masses 50 with an aqueous solution of the predetermined antibacterial and antifungal agent impregnated in the core portion, remain, and the coating layer 30 may be formed by subsequent natural drying.

[0028] <Explanation of test specimens used in each test> Here, we will explain the test specimens used in the mold resistance test and flame retardancy test described below. There are six types of test specimens, Test Specimens 1 to 6, and each test specimen has a different concentration of a predetermined antibacterial and antifungal agent in the aqueous solution (additive) sprayed to form the coating layer. The amount of aqueous solution (additive) sprayed on each test specimen is such that it covers the outer surface of 1 m 2It is approximately 156 ml (155.56 ml) per unit, contains a predetermined antibacterial and antifungal agent at various concentrations, and contains a predetermined flame retardant at a concentration of 30%. Also, the test specimens used in these tests are those obtained by cutting each of the six types of test specimens 1 to 6 into shapes suitable for each test. First, test specimen 1 has a coating layer coated with an aqueous solution spray that does not contain a predetermined antibacterial and antifungal agent. Test specimen 2 (thermal insulation material 10) has a coating layer coated with an aqueous solution (additive) containing a predetermined antibacterial and antifungal agent at a concentration of 1.0% (active ingredient of the predetermined antibacterial and antifungal agent: 1m 2 per unit is approximately 1.56 ml (1.5556 ml). Test specimen 3 (thermal insulation material 10) has a coating layer coated with an aqueous solution (additive) containing a predetermined antibacterial and antifungal agent at a concentration of 2.0% (active ingredient of the predetermined antibacterial and antifungal agent: 1m 2 per unit is approximately 3.11 ml (3.1112 ml). Test specimen 4 (thermal insulation material 10) has a coating layer coated with an aqueous solution (additive) containing a predetermined antibacterial and antifungal agent at a concentration of 3.0% (active ingredient of the predetermined antibacterial and antifungal agent: 1m 2 per unit is approximately 4.67 ml (4.6668 ml). Test specimen 5 (thermal insulation material 10) has a coating layer coated with an aqueous solution (additive) containing a predetermined antibacterial and antifungal agent at a concentration of 19.0% (active ingredient of the predetermined antibacterial and antifungal agent: 1m 2 per unit is approximately 29.56 ml (29.5564 ml). Test specimen 6 has a coating layer coated with an aqueous solution (additive) containing a predetermined antibacterial and antifungal agent at a concentration of 20.0% (active ingredient of the predetermined antibacterial and antifungal agent: 1m 2 per unit is approximately 31.11 ml (31.112 ml).

[0029] <Explanation regarding mold resistance test> Referring to Figure 3-1, next, the results of the mold resistance test regarding the degree of growth of bacteria over the number of days in six types of test specimens, which are part of various thermal insulation materials, will be explained. Figure 3-1 is a table for explaining the results of the mold resistance test for each of the six types of test specimens.

[0030] The mold resistance test was conducted using the PacificBeam MOLD test method. Six test specimens, each impregnated with a test bacterial suspension, were cultured under specified culture conditions for 7, 14, 21, and 28 days, and the growth of the fungus during each culture period was evaluated. For this mold resistance test, each of the above-mentioned test specimens 1 to 6 was cut and processed to a specified mold resistance test shape (30 mm long, 30 mm wide, and 10 mm thick).

[0031] The prescribed culture conditions for the mold resistance test involved using a temperature and humidity thermostat-equipped circulator as the culture vessel, with a temperature of 28-30°C and a humidity of 85% R·H or higher. Such a culture vessel and conditions create an environment conducive to mold growth, and when converted to practical evaluation criteria, this corresponds to approximately 3 months for 7 days of culture, approximately 1 year for 14 days, approximately 2 years for 21 days, and approximately 3-5 years for 28 days. Furthermore, in evaluating fungal growth in the mold resistance test, observations were made both visually and under a microscope. A "rating 0" was given if no fungal growth occurred; a "rating 1" if less than 10% of fungal growth occurred; a "rating 2" if 10-30% growth occurred; a "rating 3" if 30-60% growth occurred; and a "rating 4" if more than 60% growth occurred.

[0032] The culture medium used in the mold resistance test was an inorganic salt agar medium, with the following components: 0.7g of KH2PO4, 0.7g of K2HPO4, 0.7g of MgSO4·7H2O, 1.0g of NH4NO3, 0.005g of NaCl, 0.002g of FeSO4·7H2O, 0.002g of ZnSO4·7H2O, 0.001g of MnSO4·7H2O, 15g of agar, and 1000ml of pure water. This medium was then heat-treated at 121°C for 20 minutes, and the pH was adjusted to 6.0-6.5 after the addition of 0.001% NaOH and heat sterilization.

[0033] Furthermore, the test fungal suspension used in the mold resistance test was prepared by adding a mixed spore solution made from the test fungus to the infiltration solution and dispersing it thoroughly. The mixed spore solution was prepared by filtering the agar from the culture medium mentioned above, and 10 6 A solution adjusted to a spore count of ±200,000 spores / ml was used, mixed in equal volumes with another substance. A 0.05 g / L sodium lauryl sulfate aqueous solution was used as the wetting solution. The test fungi consisted of 71 species of fungi listed below (including approximately 60 species that are frequently detected in residential environments), and stock cultures of pure fungi stored at 6±4°C for 30 days or less were used.

[0034] 1.Alternaria alternata, 2.Aspergillus niger, 3.Aspergillus oryzae, 4.Aspergillus flavus, 5.Aspergillus versicolor, 6.Aspergillus humigatus, 7.Aspergillus terreus, 8.Aspergillus restrictus, 9.Aspergillus ochraceus, 10.Aspergillus candidus, 11.Alternaria tenuis, 12.Alcaligenes faecalis, 13.Alternaria brassicicola, 14.Aureobasidium pullulans, 15.Candide albicans, 16.Chaetomium globosum, 17.Cladosporium cladosporioides, 18.Cladosporium sphaerospermum, 19.Cladosporium herbarum, 20.Cladosporium resinae, 21.Curvularia lunata, 22.Drechslera australiensis, 23.Epicoccum purpurascens, 24.Eurotium tonophilum, 25.Eurotium rybrum, 26. Eurotium chevalieri, 27. Eurotium amstelodami, 28. Fusarium semitectum, 29. Fusarium oxysporum, 30. Fusarium solani, 31. Fusarium roseum, 32. Fusarium moniliforme, 33. Fusarium proliferatum, 34. Geotricham candidum, 35. Geotricham lactus, 36. Gliocladium virens, 37. Monilia fructigena, 38. Monilia nigral, 39. Mucor racemosus, 40. Myrothecium verrucaria, 41. Mucor spinescens, 42. Nigrospora oryzae, 43. Nigrospora sphaerica, 44.Neurospora sitophila, 45. Penicillium frequentance, 46. Penicillium islandicum, 47. Penicillium citrinum, 48. Pullulari pullulans, 49. Penicillium expansum, 50. Penicillium cyclopium, 51. Penicillium citreo-viride, 52. Penicillium funiculosum, 53. Penicillium nigricans, 54. Penicillium lilacinum, 55. Pestalotia adusta, 56. Pestalotia neglecta, 57. Phoma citricarpa, 58. Phoma terrestrius, 59. Phoma glomerata, 60. Rhizopus nigricans, 61. Rhizopus oryzae, 62. Rhizopus storonifer, 63. Rhizopus sorani, 64. Scedosporium PBMiospermum, 65. Trichophyton mentagrophytes, 66. Trichoderma viride, 67. Trichoderma koningii, 68. Trichoderma T-1, 69. Trichoderma harzianum, 70. Ulocladium atrum, 71. Wallemia sebi.

[0035] As shown in Figure 3-1, in the mold resistance test for test sample 1, the results were "Evaluation 3" after 7 days of culture, "Evaluation 3" after 14 days of culture, "Evaluation 3" after 21 days of culture, and "Evaluation 3" after 28 days of culture. In the mold resistance test for test sample 2, the results were "Evaluation 1" after 7 days of culture, "Evaluation 1" after 14 days of culture, "Evaluation 1" after 21 days of culture, and "Evaluation 1" after 28 days of culture. Furthermore, in the mold resistance test for test sample 3, the results were "Evaluation 0" after 7 days of culture, "Evaluation 0" after 14 days of culture, "Evaluation 0" after 21 days of culture, and "Evaluation 0" after 28 days of culture. And in the mold resistance test for test sample 4, the results were "Evaluation 0" after 7 days of culture, "Evaluation 0" after 14 days of culture, "Evaluation 0" after 21 days of culture, and "Evaluation 0" after 28 days of culture. Furthermore, in the mold resistance test on test sample 5, the evaluation was "0" after 7 days of culture, "0" after 14 days of culture, "0" after 21 days of culture, and "0" after 28 days of culture. And furthermore, in the mold resistance test on test sample 6, the evaluation was "0" after 7 days of culture, "0" after 14 days of culture, "0" after 21 days of culture, and "0" after 28 days of culture. Therefore, the 1 m² of one outer surface of a substrate such as test samples 2, 3, 4, 5, and 6 2 It was found that if the insulating material 10 has a coating layer 30 formed with 1.56 ml or more of a specified antibacterial and antifungal active ingredient per unit area, mold growth can be suppressed for a sufficient period of time, and the material has sufficient antibacterial and antifungal properties. In particular, the 1 m² of one outer surface of the substrate, such as in test samples 3, 4, 5, and 6 2 It was also found that the insulation material 10, in which a coating layer 30 is formed with a specified antibacterial and antifungal active ingredient of 3.11 ml or more per unit area, has remarkable antibacterial and antifungal properties.

[0036] <Explanation regarding flame retardancy testing> Referring to Figure 3-2, the results of flame retardancy tests using combustion tests on six types of test specimens, which are part of various insulation materials, will be explained next. Figure 3-2 is a table illustrating the results of the flame retardancy tests for each of the six types of test specimens.

[0037] The flame retardancy test was conducted in accordance with the UL94 horizontal combustion test (HB), a standard for evaluating the flammability of polymer materials. Specifically, for each of the six test specimens, the specimen was fixed horizontally, and a flame was applied to one end for 30 seconds. The combustion rate was measured from the 25 mm mark to the 100 mm mark (also referred to as the "75 mm span") on one end. The combustion rate was measured three times for each test specimen. Based on the three measured combustion rates, a "○" was given if the combustion rate in the "75 mm span" was 40 mm / min or less, and a "×" was given if the combustion rate in the "75 mm span" was faster than 40 mm / min, and the flame retardancy of each test specimen was evaluated. In this flame retardancy test, each of the above-mentioned test specimens 1 to 6 was cut and processed to the specified flame retardancy test shape (13 ± 0.5 mm × 125 ± 5 mm, thickness 3 mm to 13 mm).

[0038] As shown in Figure 3-2, in the flame retardancy test for test specimen 1, the combustion rate is the standard. The following conditions were met, and self-extinguishing properties (natural extinguishing within a "75mm span") were confirmed, resulting in a "○". Furthermore, in the flame retardancy test on test sample 2, the burning rate was below the standard, confirming self-extinguishing properties, so it was also a "○". In addition, in the flame retardancy test on test sample 3, the burning rate was below the standard, confirming self-extinguishing properties, so it was also a "○". And in the flame retardancy test on test sample 4, the burning rate was below the standard, confirming self-extinguishing properties, so it was also a "○". And in the flame retardancy test on test sample 5, the burning rate was below the standard, so it was also a "○". And in the flame retardancy test on test sample 6, the burning rate was faster than the standard, so it was also a "×". In other words, the 1m span of one outer surface of a substrate like test sample 6 2It was found that the flame retardancy of insulation materials in which a coating layer is formed with the active ingredient of a specified antibacterial and antifungal agent at a concentration of approximately 31.11 (31.112 ml) or more per unit area was inhibited by the specified antibacterial and antifungal agent. Therefore, the flame retardancy of one outer surface of a substrate such as test sample 1, test sample 2, test sample 3, test sample 4, and test sample 5 was inhibited by the specified antibacterial and antifungal agent. 2 It was found that if the insulating material 10 has a coating layer 30 formed with the active ingredient of a specified antibacterial and antifungal agent in an amount of less than approximately 31.11 (31.112 ml) per unit, it will have sufficient flame retardancy without the flame retardancy being inhibited by the specified antibacterial and antifungal agent.

[0039] <Description of the composition of the insulation material 100 in the second embodiment> Referring to Figure 4, the configuration of the second embodiment of the thermal insulation material 100, which is an example of an embodiment to which the present invention is applied, will now be described. Figure 4(A) is an overall view showing the schematic configuration of the second embodiment of the thermal insulation material 100, which is an example of an embodiment, and Figure 4(B) is an enlarged view of a part of the cross-section of the thermal insulation material 100.

[0040] As shown in Figure 4(A), the thermal insulation material 100 is a sheet-like material with a predetermined thickness, comprising a base material 120 formed of multiple short polyester fibers, and a coating layer 130 formed near the outer surface (each of the two opposing outer surfaces) of the base material 120 and consisting of multiple short fibers coated with a predetermined antibacterial and antifungal active ingredient. In the thermal insulation material 100, the multiple short polyester fibers, the predetermined antibacterial and antifungal agent, and the predetermined flame retardant are the same as those in the thermal insulation material 10 of the first embodiment described above. Furthermore, in the coating layer 130, the outer surface of the base material 120 is 1 m 2 Each is coated with a specified antibacterial and antifungal active ingredient in an amount of 1.56 ml or more but less than 31.11 ml, and a specified flame retardant active ingredient in an amount of 15.56 ml or more.

[0041] As shown in Figure 4(B), the base material 120 of the thermal insulation material 100 is formed of multiple fiber sheets 150 in which multiple short fibers are intertwined in a sheet-like (planar) shape. Each of the multiple fiber sheets 150 is intertwined with other fiber sheets 150 arranged above and below it by some of the short fibers protruding from the periphery of the fiber sheet 150, and is also heat-welded with the low-melting-point polyester short fibers it contains. In other words, since the base material 120 is formed as if multiple fiber sheets 150 were stacked, it has a structure in which voids are formed between the multiple fiber sheets 150. In the fiber sheets 150 that form the base material 120, multiple short fibers are intertwined while maintaining a predetermined thickness, so a structure in which voids are formed between the multiple short fibers is also formed. Furthermore, the coating layer 130 of the base material 120 is a plurality of fiber sheets 150 arranged near the outer surface of the base material 120, and has short fibers coated with a predetermined antibacterial and antifungal active ingredient. That is, it is formed of a plurality of fiber sheets 150 in which at least a portion is coated with a predetermined antibacterial and antifungal active ingredient. Furthermore, the fiber sheet 150 contains 1 to 40% by mass of the low-melting-point polyester staple fibers described above, and these low-melting-point polyester staple fibers function as a binder between multiple staple fibers (multiple high-melting-point polyester staple fibers, etc.) by heat welding.

[0042] The manufacturing method for the insulation material 100 of the second embodiment is different from that of the insulation material 10 of the first embodiment described above. Specifically, after the fiber mixing step S10, which is the same as in the manufacturing method of the insulation material 10, a fiber sheet molding step is performed as step S20 to form a fiber sheet 15 made of multiple short fibers. Then, as step S30, a laminated sheet forming step is performed to form a laminated sheet by laminating the multiple fiber sheets formed in the fiber sheet molding step. After that, in substantially the same manner as in the manufacturing method of the insulation material 10, an aqueous solution (additive) containing a predetermined antibacterial and antifungal agent and a predetermined flame retardant is sprayed onto the laminated sheet in the additive spraying step S40, and the heat treatment step S50 is performed to manufacture the insulation material 100. Furthermore, in the insulation material 100 of the second embodiment, when the same mold resistance test as in the insulation material 10 of the first embodiment described above is performed, the same results are obtained as with the insulation material 10, on 1 m of one outer surface of the base material 120. 2 Since the coating layer 130 is formed with at least 1.56 ml of the specified antibacterial and antifungal active ingredient per unit area, it was found that mold growth can be suppressed for a sufficient period of time, and that it has sufficient antibacterial and antifungal properties. Furthermore, when the same flame retardancy test as the insulation material 10 of the first example described above was performed on the insulation material 100 of the second example, it was found that, similar to the insulation material 10, one outer surface of the base material 120 was 1 m 2 Since the coating layer 130 is formed by less than approximately 31.11 (31.112 ml) of the specified antibacterial and antifungal active ingredient, it was found that the flame retardancy is not inhibited by the specified antibacterial and antifungal agent, and that sufficient flame retardancy is achieved.

[0043] <Features of the thermal insulation material 10,100 of this embodiment and its manufacturing method> The thermal insulation material 10,100 of the above-described embodiment is characterized by comprising a base material 20,120 made of a plurality of short fibers made of polyester, and a coating layer 30,130 made of a plurality of short fibers formed near at least one outer surface of the base material 20,120 and coated with an active ingredient of a predetermined antibacterial and antifungal agent.

[0044] In such insulation materials 10, voids are formed between multiple short polyester fibers within the base material 20, thus creating a sufficient layer of air to suppress heat conduction. Furthermore, in insulation materials 10, a coating layer 30 consisting of multiple short fibers coated with a predetermined antibacterial and antifungal active ingredient is formed near the outer surface of the base material 20, thus providing excellent mold resistance. Therefore, such insulation materials 10 can be used as residential insulation materials that have sufficient thermal insulation properties and superior mold resistance compared to conventional insulation materials that do not have a coating layer.

[0045] Furthermore, according to the above-described embodiment of the thermal insulation material 10, the base material 20 has a plurality of fiber masses 50 in which a plurality of short fibers are intertwined in a granular manner, and the coating layer 30 is disposed near at least one outer surface of the base material 20 and can be configured to include a plurality of fiber masses 50 having short fibers coated with a predetermined antibacterial and antifungal active ingredient. In such a thermal insulation material 10, since the base material 20 is composed of a plurality of fiber masses 50, the gaps between the plurality of fiber masses 50 are more easily maintained compared to a structure in which a plurality of fiber sheets formed into a sheet shape from a plurality of short fibers are laminated, and a sufficient layer of air can be formed to suppress heat conduction. In addition, in such a thermal insulation material 10, since the coating layer 30 includes a plurality of fiber masses 50 having short fibers coated with a predetermined antibacterial and antifungal active ingredient, the microscopic surface area is increased, making it easier for mold spores to come into contact with the short fibers coated with the predetermined antibacterial and antifungal active ingredient. Therefore, such a thermal insulation material 10 can be used as a residential thermal insulation material that has sufficient thermal insulation properties as well as superior mold resistance compared to conventional materials.

[0046] Furthermore, according to the above-described embodiment of the heat insulating material 10,100, the covering layer 30 etc. is attached to at least one outer surface of the base material 20 etc. 2The insulation material 10 can be coated with a specified amount of antibacterial and antifungal active ingredient, ranging from 1.56 ml to less than 31.11 ml per unit. Such insulation material 10, as shown in the results of the mold resistance test described above, has excellent mold resistance and sufficient flame retardancy, and can therefore be used as a residential insulation material with superior mold resistance compared to conventional materials.

[0047] Furthermore, according to the manufacturing method of the heat insulating materials 10 and 100 of the above-described embodiment, the method is characterized by performing a fiber mass sheet formation step S30, which involves forming a sheet-like fiber mass sheet, etc.; an additive spraying step S40, which involves spraying an additive containing a predetermined antibacterial and antifungal agent onto at least one outer surface of the fiber mass sheet, etc. formed in the fiber mass sheet formation step S30, etc., thereby impregnating the fiber mass sheet, etc. with a predetermined antibacterial and antifungal agent; and a heat treatment step S50, which involves applying heat to the outer surface of the fiber mass sheet, etc., to which the additive was sprayed in the additive spraying step S40, thereby drying the impregnated predetermined antibacterial and antifungal agent to form a coating layer 30 and melting low-melting-point polyester short fibers to form a base material 10.

[0048] With this method of manufacturing the insulation materials 10 and 100, the fibrous mass sheet, etc., is impregnated with a predetermined antibacterial and antifungal agent in the additive spraying step S40, and then in the heat treatment step S50, a coating layer 30, etc., coated with the active ingredient of the predetermined antibacterial and antifungal agent is formed on the outer surface of the base material 20, etc., making it possible to manufacture insulation materials for housing with superior antifungal properties compared to conventional methods. Furthermore, with this method of manufacturing the insulation material 10, etc., as described above, the additive sprayed in the additive spraying step S40 is an aqueous solution containing a predetermined antibacterial and antifungal agent at a concentration of 1.0% or more, so that the active ingredient of the predetermined antibacterial and antifungal agent can be impregnated over a wide area of ​​the fibrous mass sheet, etc. / base material 20, etc. Moreover, with this method of manufacturing the insulation material 10, etc., in the heat treatment step S50, the fibrous mass sheet, etc., on which the impregnated layer has been formed is heat-treated at a temperature in a heating device that melts the low-melting-point polyester fibers, thereby removing the water from the aqueous solution of the predetermined antibacterial and antifungal agent and drying it, as well as melting the low-melting-point polyester fibers. With this method of manufacturing the insulation material 10, not only is it sufficiently coated with the active ingredient of the antibacterial and antifungal agent, but the active ingredient of the antibacterial and antifungal agent can also be incorporated into the molten short fibers or fiber mass 50, making it possible to manufacture an insulation material with sufficient antifungal properties.

[0049] Furthermore, according to the manufacturing method of the thermal insulation material 10 of the above embodiment, in the fiber sheet formation step S30, a fiber mass sheet can be formed by arranging multiple fiber masses 50, in which multiple short fibers are intertwined in a granular manner, in a three-dimensional manner. In this manufacturing method of the thermal insulation material 10, since the fiber mass sheet (base material 20) is composed of multiple fiber masses 50, the gaps between the multiple fiber masses 50 are more easily maintained compared to a structure in which multiple fiber sheets formed into a sheet shape from multiple short fibers are laminated, and a thermal insulation material 10 that suppresses heat conduction by forming a sufficient layer of air can be manufactured. In addition, in this manufacturing method of the thermal insulation material 10, the active ingredient of a predetermined antibacterial and antifungal agent is impregnated into the fiber mass sheet composed of multiple three-dimensionally arranged fiber masses 50 before melting the low-melting-point polyester short fibers, so that the active ingredient of the predetermined antibacterial and antifungal agent can be impregnated into the core portion of the fiber mass 50. Therefore, with this method of manufacturing the thermal insulation material 10, it is possible to manufacture a thermal insulation material 10 formed from a fiber mass 50 having a core made of short fibers coated with a predetermined antibacterial and antifungal active ingredient. As a result, the thermal insulation material 10 is not only sufficiently coated with the antibacterial and antifungal active ingredient, but the molten short fibers and fiber mass 50 can also incorporate the antibacterial and antifungal active ingredient, making it possible to manufacture a thermal insulation material with sufficient antifungal properties.

[0050] Furthermore, according to the manufacturing method of the thermal insulation material 10 of the above embodiment, in the additive spraying step, at least one outer surface of the fiber mass sheet (base material 20) is sprayed 1 m 2 The additive can be sprayed so as to impregnate the material with 1.56 ml or more and less than 31.11 ml of the active ingredient of a predetermined antibacterial and antifungal agent per unit. In the above-described method for manufacturing the heat insulating material 10, for example, 1 m of at least one outer surface of the fiber mass sheet (base material 20) 2When an aqueous solution of a predetermined antibacterial and antifungal agent is sprayed to impregnate a small amount of the agent's active ingredient, such as less than 1.56 ml per unit, there is a risk that a coating layer 30 with sufficient antibacterial and antifungal properties cannot be formed because the amount of the agent's active ingredient is too small. However, with this method of manufacturing the insulation material 10, it is possible to impregnate the material with the agent's active ingredient in such a way that a coating layer 30 with sufficient antifungal properties can be formed, thus enabling the production of a residential insulation material with superior antifungal properties compared to conventional methods.

[0051] <Other Embodiments> In the manufacturing method of the thermal insulation material 10, etc., described above, the additive sprayed in the additive spraying step S40 contains not only a predetermined antibacterial and antifungal agent at a predetermined concentration, but also a predetermined flame retardant at a predetermined concentration. However, it is not limited to this, and for example, two additives may be sprayed, such as a first additive containing a predetermined antibacterial and antifungal agent at a predetermined concentration, and a second additive containing a predetermined flame retardant at a predetermined concentration. Specifically, such an additive spraying step in which two additives are sprayed may be a step performed using two sprayers, and the spraying may be performed in two stages, such as spraying the first additive and then the second additive, or the first additive and the second additive may be sprayed substantially simultaneously on the same outer surface of the fiber mass sheet. Even in a manufacturing method that performs an additive spraying step in which two additives are sprayed in this manner, the predetermined antibacterial and antifungal agent's active ingredient can be impregnated so that a coating layer of the active ingredient of the antibacterial and antifungal agent with sufficient antifungal properties is formed, making it possible to manufacture a thermal insulation material for housing with better antifungal properties than conventional materials.

[0052] In the above-described embodiment of the heat insulating material 10, the multiple polyester short fibers forming the heat insulating material 10 are two or more types of short fibers made of flame-retardant polyester coated with silicone and having different melting points. However, the invention is not limited to this, and two or more types of short fibers made of non-flammable polyester with different melting points may be used. For example, the heat insulating material 10 (base material 20) may be formed of high-melting-point polyester short fibers made of flame-retardant polyester coated with silicone and low-melting-point polyester short fibers made of non-flammable polyester not coated with silicone, or it may be formed of high-melting-point polyester short fibers made of non-flammable polyester not coated with silicone and low-melting-point polyester short fibers made of flame-retardant polyester coated with silicone. Even if the heat insulating material is formed of such polyester short fibers, it can achieve the same effects as the heat insulating material 10 in the above-described embodiment.

[0053] In the above-described embodiment of the heat insulating material 10, the short fibers forming the base material 20 are made of polyester (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), etc.), but they may also be long fibers of 100 mm or more, or short or long fibers of other materials. Other materials may include synthetic fibers or natural fibers, such as polyolefin fibers, acrylic fibers, polyamide fibers, cellulose fibers, polyphenylene sulfide (PPS) fibers, wool, etc. Furthermore, the short fibers may be mixed fibers obtained by mixing multiple types of short fibers of different materials from among these fibers.

[0054] In the above-described embodiment of the heat insulating material 10, the base material 20 is composed of a plurality of fiber bundles 50 or a plurality of fiber sheets 150, but other structures are also possible. For example, it may be a structure such as a nonwoven fabric in which a plurality of short fibers are irregularly intertwined and low-melting-point short fibers are heat-welded together.

[0055] In the above-described embodiment of the insulation material 10, the predetermined antibacterial and antifungal agent contains diiodomethyl-p-trisulfone as an active ingredient, but it may consist of other antibacterial and antifungal active ingredients. An example of an antibacterial and antifungal agent consisting of other antibacterial and antifungal active ingredients is one in which 2-Mercaptopyridine oxide is the active ingredient, and it may have a boiling point of 100°C, a specific gravity of 1.12±0.08, a viscosity (20°C) of 6 mPa·sec, a pH of 7.0~8.0, and be adjusted to have a milky white appearance. Even with an insulation material manufactured using such an antibacterial and antifungal agent, a coating layer 30 with sufficient antibacterial and antifungal properties can be formed, making it possible to create a housing insulation material with superior antifungal properties compared to conventional materials. An example of a commercially available antibacterial and antifungal agent consisting of other antibacterial and antifungal active ingredients is "Kabi Shugoshin" manufactured by R.C. Umehara Co., Ltd.

[0056] In the heat insulating material 10 of the above-described embodiment, the predetermined flame retardant contains a guanidine-based compound or the like as an active ingredient. A specific commercially available example is "Nikka Finon P-205" ("Nikka Finon" is a registered trademark) manufactured by Nikka Chemical Co., Ltd. Alternatively, the predetermined flame retardant may consist of other flame-retardant active ingredients. A predetermined flame retardant consisting of other flame-retardant active ingredients may consist of a water-soluble polyester resin (saturated copolymer polyester resin) with terephthalic acid as the main component as an active ingredient. A specific commercially available example is "Pluscoat Z-561" ("Pluscoat" is a registered trademark) manufactured by Go-O Chemical Industry Co., Ltd. Alternatively, a predetermined flame retardant consisting of other flame-retardant active ingredients may consist of a halogen-free phosphorus-based water-soluble polyester resin (saturated polyester resin) as an active ingredient. A specific commercially available example is "Pluscoat Z-900" ("Pluscoat" is a registered trademark) manufactured by Go-O Chemical Industry Co., Ltd. Furthermore, other commercially available flame retardants may include any of the following manufactured by Marubishi Oil & Chemical Industries Co., Ltd.: "NON-NEN WS-1, NON-NEN WS-2, and NON-NEN WS-8" ("NON-NEN" is a registered trademark). Even when insulation material is manufactured using such flame retardants, it is possible to form a coating layer 30 that has sufficient antibacterial, antifungal and flame-retardant properties, thus making it possible to create a residential insulation material with superior antifungal properties compared to conventional materials.

[0057] In the method for manufacturing the thermal insulation material 10 of the above-described embodiment, the heat treatment step S50 involves drying a predetermined antibacterial and antifungal agent impregnated in the impregnation layer of the fiber block sheet to form a coating layer 30, and then heat-welding a plurality of fiber blocks 50 to form a base material 20 to form the thermal insulation material 10. However, the method is not limited to this. For example, a first heat treatment of the fiber block sheet may be performed to melt low-melting-point polyester fibers and form a base material 20. Then, a predetermined antibacterial and antifungal agent may be sprayed onto the base material 20 to form an impregnation layer. Finally, a second heat treatment (for example, a heat treatment at 100°C or lower, at a temperature where the low-melting-point polyester fibers do not melt and where the moisture contained in the antibacterial and antifungal agent is dried) on the base material 20 with the formed impregnation layer to form a thermal insulation material 10 having a coating layer 30 coated with the active ingredients of the predetermined antibacterial and antifungal agent. Even with such a method for manufacturing thermal insulation material, it is possible to manufacture a thermal insulation material that can achieve the same effects as the thermal insulation material 10 of the above-described embodiment.

[0058] The present invention has been described above based on embodiments and modifications. However, the embodiments of the invention described above are for the purpose of facilitating understanding of the present invention and do not limit it. The present invention can be modified and improved without departing from its spirit and claims, and the present invention includes equivalents thereof. [Explanation of Symbols]

[0059] 10,100...insulating material, 20,120...base material, 30,130...coating layer, 50...fiber mass, 150...fiber sheet.

Claims

1. A base material consisting of multiple short fibers made of polyester, An insulating material comprising: a coating layer formed near at least one outer surface of the substrate and consisting of a plurality of short fibers coated with a predetermined antibacterial and antifungal active ingredient.

2. In the thermal insulation material according to claim 1, The substrate has a plurality of fiber masses in which a plurality of the short fibers are intertwined in a granular manner. The insulating material is characterized in that the coating layer is disposed near at least one outer surface of the substrate and includes a plurality of fiber masses having short fibers coated with the active ingredient of the predetermined antibacterial and antifungal agent.

3. In the thermal insulation material according to claim 1 or claim 2, The coating layer covers at least one outer surface of the substrate, 1 m ２ An insulating material characterized by being coated with the active ingredient of the specified antibacterial and antifungal agent in an amount of 1.56 ml or more and less than 31.11 ml per unit.

4. A method for manufacturing an insulating material comprising a base material made of short polyester fibers and a coating layer made of the short fibers coated with a predetermined antibacterial and antifungal active ingredient, A fiber sheet forming step, in which a fiber sheet is formed by shaping a plurality of the aforementioned short fibers into a sheet, An additive spraying step is performed by spraying an additive containing the predetermined antibacterial and antifungal agent onto at least one outer surface of the fiber sheet formed in the fiber sheet forming step, thereby impregnating the fiber sheet with the predetermined antibacterial and antifungal agent. A method for manufacturing an insulating material, comprising: a heat treatment step in which heat is applied to the outer surface of the fiber sheet to which the additive has been sprayed in the additive spraying step, thereby drying the predetermined antibacterial and antifungal agent that has been impregnated to form the coating layer, and welding a portion of the short fibers to form the base material.

5. In the method for manufacturing an insulating material according to claim 4, The method for manufacturing a thermal insulation material is characterized in that the fiber sheet forming step involves arranging a plurality of fiber clumps, in which a plurality of short fibers are intertwined in a granular manner, in a three-dimensional manner to form the fiber sheet.

6. In the method for manufacturing an insulating material according to claim 4 or claim 5, The additive spraying step is performed on at least one outer surface of the fiber sheet, 1 m ２ A method for producing an insulating material, characterized by spraying the additive so as to impregnate it with 1.56 ml or more and less than 31.11 ml of the predetermined antibacterial and antifungal active ingredient per unit.

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