Antifungal/antibacterial agent comprising two-step baked shell powder

A technology of antibacterial agent and powder, which is applied in the field of inorganic composite antifungal agents to achieve excellent antifungal effect and antibacterial effect, significant antifungal effect and antibacterial effect

Inactive Publication Date: 2008-12-10
NIPPON NATURAL RESOURCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The present invention solves the above-mentioned problems in the conventional antifungal agent composed of fired shell powder, and provides a method that can be easily produced without using special chemicals or special methods by using shells, a natural material with high safety, as a raw material. , an inorganic antifungal agent that has an effective and sustainable antifungal effect and does not cause environmental burdens when discarded

Method used

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  • Antifungal/antibacterial agent comprising two-step baked shell powder
  • Antifungal/antibacterial agent comprising two-step baked shell powder
  • Antifungal/antibacterial agent comprising two-step baked shell powder

Examples

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Effect test

Embodiment 1

[0046] After washing and drying, the scallop shells from Lake Saroma in Hokkaido are coarsely crushed with a roller mill to an average particle size of about 5mm, and the crushed product is placed in an electric furnace at 500°C for 2 hours in a nitrogen atmosphere. once fired. Then, the baked product was subjected to secondary firing at 700° C. for 2 hours in an air atmosphere. The fired shells were pulverized with a jet mill to obtain fired shell powder having an average particle diameter of about 5 μm. The composition of the fired powder was studied by X-ray diffraction, and the results were as follows: figure 1 As shown, it was confirmed that the main component was calcite-type calcium carbonate and calcium oxide was contained. Also, the result of measuring the BET specific surface area was 27.8m 2 / g. Furthermore, the fired shell powder was observed under an electron microscope as a porous body ( figure 2 , image 3 ). Furthermore, chemical analysis of the fired s...

Embodiment 2

[0048]For the scallop shell of Example 1, burnt shell powder (sample No.1-6) is produced according to the manufacturing method shown in Table 1, and the preparation makes the fired shell powder uniform with a proportion of 0.3-1.0wt%. A test body obtained by dispersing in an FRP material. The mold resistance test was performed on this test body. The test was performed based on the MS-45 method using 45 species of fungi. The test bacteria, test conditions and evaluation methods are shown in Table 2. The test results are shown in Table 3. As shown in Table 3, the test body containing the unfired product of sample No. A1 had no antifungal effect at all. Calcium carbonate was used as the main component of the fired product mixed with sample No.A2, which was fired at a low temperature. At the beginning of the test, it had a considerable anti-mold effect, but at the end of the test, the mold grew significantly, and the anti-mold effect was not sustainable. sex. The test body of...

Embodiment 3

[0057] Washed and dried scallop shells from Mutsu Bay, Aomori Prefecture are roughly crushed with a roller mill to an average particle size of about 10mm, and the crushed product is placed in an electric furnace at 500°C under a nitrogen atmosphere. 2 hours of one firing. Then, the fired product was subjected to secondary firing at 650° C. for 3 hours in an air atmosphere. This was finely pulverized with a jet mill to obtain fired shell powder having an average particle diameter of about 7 μm. The composition of the fired powder was studied by X-ray diffraction, and the result was the same as figure 1 roughly the same result. In addition, the BET specific surface area of ​​the calcined powder was 25.9m 2 / g. Furthermore, by electron microscopy, with figure 2 Similarly, it was observed that the calcined powder was a porous body maintaining the shell structure of the scallop, and fine particles of calcium oxide were present in the interior. Furthermore, chemical analysis ...

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Abstract

An antifungal / antibacterial agent characterized by comprising a baked shell powder which is obtained by washing shells with water, drying, roughly grinding, baking the ground matter in a nonoxidative conditions at a low temperature of from 500C to 600C, further baking it in the air atmosphere at a medium temperature of from 600C to 900C and then microgrinding the same preferably to give an average grain size of 40 [mu]m or less. By baking the shells in two steps as described above, it is possible to form an inorganic composite powder in which a small amount of calcium oxide is scattered in porous calcite-type calcium carbonate. Because of having a porous nature and synergistic effects of calcium carbonate and calcium oxide, this powder can exert long-lasting and excellent antifungal and antibacterial effects.

Description

technical field [0001] The invention relates to an antifungal and antibacterial agent composed of shell powder obtained by two-step firing. In more detail, the present invention relates to an inorganic composite antifungal agent composed of the following shell powder, which is scallop (also called scallop, Japanese original text is : ホタテ) Coarse pulverization of shells is obtained by changing the firing atmosphere to perform two-step firing treatment, and then finely pulverizing. [0002] The antifungal agent of the present invention can effectively and continuously inhibit Aspergillus niger, Monascus, Penicillium, Alternaria oleracea, Aspergillus, etc. Proliferation of fungi. Background technique [0003] In recent years, with the increasing demand for a healthy and comfortable life, the need for sterilization and antibacterial has increased, and many antibacterial and antibacterial agents have been developed. Among the existing disinfectants and antibacterial agents, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/06A01P3/00A01N63/10
CPCA01N59/06A01N63/10A01N59/00
Inventor 成田荣一佐藤德一
Owner NIPPON NATURAL RESOURCE
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