JPS6254765B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a novel disinfectant and an apparatus for producing the same. In recent years, with the increase in round-trip exchange with other countries and the increase in the amount of various raw materials being imported, the influx of harmful bacteria into Japan has also increased, and contamination by these bacteria and its prevention have become a major problem. ing. In particular, the current situation is that the toxin-type Staphylococcus aureus to the infectious-type pathogenic Escherichia coli are deteriorating both quantitatively and qualitatively. For this reason, various measures have been taken to prevent contamination by these bacteria and to kill them, especially for commercially available foods.Generally, this is done by kneading or spraying an aqueous solution of ethyl alcohol, depending on the type of food. It is. The concentration of the alcohol aqueous solution is effective in the range of 55 to 95%, but 70%
~80%, especially around 75% is most effective. When this alcohol comes into contact with bacteria, it acts on the bacterial cell walls and membranes, causing amino acids to leak out and causing starvation.
It has a certain degree of bactericidal or bactericidal effect because it inhibits the metabolic synthesis of bacterial cells and slows down the growth of microorganisms due to the entry of alcohol. This is insufficient in cases where the surface has a hard film or the like. Also, focusing on the bacteriostatic effect and non-flammability of carbon dioxide gas, a food sterilizing agent was proposed in which liquid ethyl alcohol and liquefied carbon dioxide gas were dissolved and coexisted. Storage requires considerably high pressure and handling is not easy.
Disinfectants containing this are stored in high-pressure cylinders, making them difficult to transport and handle, and sterilizing them requires special equipment and requires long-term treatment under pressure, making it impractical. It wasn't. In particular, when pressurizing food products with internal porous properties such as castella cakes and breads, they deformed and could not be used well. Thus, an object of the present invention is to provide a sterilizing agent that contains ethyl alcohol and carbon dioxide gas, is easy to manufacture and handle, is practical, and can be particularly suitably used for sterilizing internally porous foods. According to the research and experiments of the present inventor, stirring motion is applied to a 55 to 95% alcohol aqueous solution under pressure, and gaseous carbon dioxide is injected into the alcohol aqueous solution under pressure to inject gaseous carbon dioxide into the alcohol aqueous solution. It has now been found that this objective can be achieved with a disinfectant obtained by absorption. To explain the present invention in more detail, in the present invention, gaseous carbon dioxide gas is absorbed into an aqueous solution of ethyl alcohol that is vigorously stirred under pressure at a concentration of 55 to 95%, preferably 70 to 80%, and particularly around 75%. It is used as a disinfectant. At room temperature and pressure, 3.13 times the volume of carbon dioxide gas is absorbed and dissolved in ethyl alcohol. This solubility usually increases in proportion to pressure. It is also effective to simply mix the two and absorb carbon dioxide to the extent described above, but
In particular, when carbon dioxide gas is ejected into alcoholic liquid that has been vigorously stirred under pressure using a device that will be explained later, if carbon dioxide gas is injected under pressure, for example at a pressure of 2 atmospheres, more than five times the volume can be absorbed. When the absorbed liquid is sprayed, it permeates into the interior of the substance to be treated, allowing for complete sterilization. For example, when this liquid is sprayed onto the surface of internally porous foods such as castella cake and bread, the liquid immediately permeates from the surface to the inside. This alcohol +
Since the weight of carbon dioxide gas is heavier than the weight of air in the same volume, it quickly penetrates into the center, and the vaporized carbon dioxide gas quickly replaces the air inside the porous structure, causing the air in the food to disappear. deoxygenation is completed at that point. This deoxygenation kills the life of aerobic bacteria and creates a sterile zone. Similarly, the vaporized alcohol exhibits its antibacterial ability in this deoxygenation system, and cannot be left behind by deoxygenation with carbon dioxide gas alone. It also kills the anaerobic bacteria present, so it has a long-lasting effect. The disinfectant of the present invention is composed of an alcohol aqueous solution and carbon dioxide gas, and cannot be prepared simply by uniformly mixing the two by ordinary means. The sterilizer manufactured by and manufactured by the device is particularly effective, and can quickly penetrate into the inside of food to reliably sterilize not only the surface but also the inside and deep parts of the food. Conventionally, when packaging this type of food, in order to prevent the early volatilization of the alcohol disinfectant used and make it last longer, packaging with high gas barrier properties is required.
Therefore, it was necessary to package the product in a relatively expensive and thick material, but when using the disinfectant of the present invention, alcohol is applied to the product in a deoxidized state by carbon dioxide gas absorbed under pressure to exert a bactericidal or antibacterial effect. Since it is made larger, it is no longer necessary to package it with a material with high gas barrier properties, and it can be packaged with an inexpensive material, which is not only hygienic but also extremely economical. Thus, another object of the present invention is to provide an apparatus for producing such a disinfectant, which comprises a plurality of gears and an internal gear that encloses these gears and meshes with each of the gears. The shafts of the two gears are non-rotating and have a carbon dioxide gas supply hole drilled in their axial center, and a carbon dioxide gas passage that communicates with the supply hole in the radial direction from the outer peripheral surface of the shaft, and are supported by the shaft. The gear is provided with a carbon dioxide gas passage that communicates from its inner peripheral surface to the top surface of each tooth, so that the tooth surface of the gear tooth contacts the tooth surface of the internal gear tooth and the tooth bottom portion is sealed. The present invention provides a sterilizer manufacturing apparatus equipped with a geared stirring device formed so that the carbon dioxide gas passage of the shaft and the carbon dioxide gas passage of the gear match when the carbon dioxide gas passage is made. To further explain the disinfectant manufacturing apparatus according to the present invention, an alcohol aqueous solution is vigorously stirred under pressure to absorb or adsorb carbon dioxide gas. This is carried out using a geared stirring device as shown in the drawing provided at the bottom of a tank filled with an aqueous alcohol solution. This geared stirrer includes a large-diameter spur gear A1, smaller-diameter spur gears A2 and A3, and an internal gear B that encloses these spur gears A1, A2, and A3 and meshes with each of them. , these spur gears A1, A2,
The tip circles of A3 are arranged as close as possible to each other, and the rotational force of the spur gear A3 is applied by the shaft 7, causing the internal gear B and each of the spur gears A1, A2, and A3 to rotate in the direction of the arrow. is now being given. The shaft 1 of the large-diameter spur gear A1 is non-rotating, and a carbon dioxide gas supply hole 2 is axially bored in the axial center of the shaft 1, and is connected to a carbon dioxide gas supply source. Further, a passage 3 communicating with the carbon dioxide gas supply hole 2 is bored in the shaft 1 in the radial direction, and the outer end thereof is opened on the outer circumferential surface of the shaft 1. The large-diameter spur gear A1 is provided with a passage 5 for each tooth, which communicates from the inner circumferential surface to the top surface 4a of each tooth 4. 4b, 4c are in contact with the left and right tooth surfaces 6b, 6c of the teeth 6 of the internal gear B, and the bottom portions 6 of the internal gear B
When a is in a sealed state, the tooth tip surface 4 of that tooth 4
A passage 5 opening at point a matches the passage 3 of the shaft 1, and both passages 3 and 5 are communicated with each other so that carbon dioxide gas is ejected toward the tooth bottom portion 6a of the internal gear B. Although not shown, both sides of the internal gear B are partially sealed by a flat plate member having a liquid inlet and outlet, to prevent liquid and gas from flowing out and to withstand high pressure. In the figure, 8 indicates the teeth of the spur gear A3, and 9, 10, and 11 indicate the casing. In the above configuration, spur gears A1, A2, A3
The shaft rotates at a peripheral speed of 30 to 80 m/s to agitate the alcoholic liquid supplied into the internal gear B at high speed, and at the same time pumps carbon dioxide gas into the shaft ¹ with a pressure of 2 to 3 kg/cm2. The carbon dioxide gas is supplied to the carbon dioxide gas supply passage 2. As the spur gears A1, A2, and A3 rotate, the alcohol liquid is disturbed between the spur gears A1, A2, and A3 that rotate in opposite directions at the opposing portions of the tip circles of each of the spur gears A1, A2, and A3. The alcohol liquid that reached the meshing area between the large-diameter spur gear A1 and the internal gear B is drawn into the meshing area, and when the tooth surfaces of the two come into contact, the alcohol in that area is absorbed. The liquid is compressed and dispersed, and the teeth 4,
As the meshing of the parts 6 deepens, the degree of pressurization increases, and the alcohol becomes violently stirred. When the teeth 4 of the spur gear A1 and the teeth 6 of the internal gear B mesh as described above and the bottom portion 6a of the internal gear B is sealed, the passage 3 of the shaft 2 and the passage 5 of the spur gear A1 are closed. match, and carbon dioxide gas is injected from the tooth tip surface 4a through both passages 3 and 5. In this way, the carbon dioxide gas injected under high pressure comes into contact with the vigorously stirred alcoholic liquid under the high pressure of 200 to 300 atmospheres as mentioned above, and this carbon dioxide gas is It is well absorbed or adsorbed in alcoholic liquids, and a stable liquid can be obtained even under no pressure. In addition, in this example, the case where a spur gear is used has been explained, but the tooth shape is not limited to a spur gear, and it may be a helical gear or the like, and the number of gears may also be changed. The number is not limited to three. In this way, by applying stirring motion to the alcoholic liquid under pressure using the geared stirring device of the present invention and injecting carbon dioxide gas under pressure into the alcoholic liquid, carbon dioxide gas of five times or more volume can be stably added to the alcoholic liquid. It can be absorbed or adsorbed, and when the liquid thus prepared is used as a disinfectant, for example by spraying, it penetrates well into the food and completely kills all types of bacteria, both aerobic and anaerobic, and also kills mold. It is also possible to prevent such occurrences. Unlike the conventional disinfectant using liquefied carbon dioxide, the disinfectant of the present invention is easy to manufacture and handle, is inexpensive, and penetrates into the object in a short period of time, eliminating internally porous foods. It is also extremely practical as it can be effectively sterilized without causing deformation. Two examples are given below. Example 2 is an example of a disinfectant prepared according to the present invention, but for reference, there is also an example of a disinfectant obtained simply by uniformly mixing an aqueous alcohol solution and carbon dioxide gas. Listed as 1. The disinfectant in Example 2 could of course be used under normal pressure, and was effective because it could penetrate well into the interior without causing compression or deformation. Example 1 The disinfectant of the present invention, which was prepared by absorbing 20 c.c. of a 20% plain soda solution into 100 c.c. of a 95% aqueous alcohol solution under 2.5 atmospheres, was sprayed onto various confectionery products. while 95%
Various types of bacteria were tested on the test confectioneries before spraying only alcohol solution, after spraying alcohol only, and after spraying the disinfectant of the present invention (alcohol + soda carbonate). The results are shown in Table 1, and it is clear that this disinfectant is effective not only before spraying but also when compared to spraying only alcohol. Example 2 Next, apply a 75% alcohol aqueous solution at a circumferential speed of 15,000~
Stirred with a high-speed rotating stirrer at 20,000 m/min, and
Carbon dioxide gas is absorbed at a pressure of Kg/cm ² for 3 minutes and 30 seconds (in the case of water, the time is 50 seconds, but the absorption rate for alcohol is 3.12 seconds).
Since it is double the volume, the time is longer by that amount, 3 minutes.
A fungicide test was carried out by spraying walnut pie and castella cake with a disinfectant prepared by ejecting (30 seconds) and absorbing about 5 times the volume of carbon dioxide gas relative to the alcohol aqueous solution. The test was conducted for 15 days since the sales guarantee period is normally 15 days, but no mold was detected during this test period. PH was also measured at the same time, and the results are shown in Test 1 in Tables 2 and 3, respectively. For comparison, the results of the anti-mold test when the same food was sprayed with a 75% alcohol aqueous solution (using "Hinetress" sold by Nippon Kayaku Co., Ltd.) and when nitrogen dioxide was sprayed are shown in Test 2 and Test 2 in Tables 2 and 3, respectively. Shown in 3. The results of PH measurement are also shown at the same time. Based on this, it is clear that mold was generated from the 5th to the 10th. Thus, it is clear that the disinfectant of the present invention was much more effective when using only alcohol solution than when using nitrogen dioxide. The anti-mold test was conducted using a constant temperature chamber at a temperature of 27°C and a humidity of 75%. In the table, + means occurrence of mold, 〓 means its growth, 〓 means vigorous growth, and - means no mold occurs at all.

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【table】 [Brief explanation of the drawing]

FIG. 1 is an explanatory view of the mechanism of the geared stirring device used in the apparatus according to the present invention, and FIG. 2 is an enlarged explanatory view of the main parts of the device. FIG. 3 is a sectional view taken along the line -- in FIG. 1. A1, A2, A3... Spur gear, B... Internal gear, 1... Shaft, 2... Gas supply hole, 3, 5...
Gas supply passage, 4...teeth.

Claims (1)

[Claims] 1. By subjecting a 55 to 95% alcohol aqueous solution to stirring motion under pressure and injecting gaseous carbon dioxide under pressure into the stirred alcohol aqueous solution to cause the alcohol aqueous solution to absorb the gaseous carbon dioxide. An internally porous food disinfectant that can be used under normal pressure. 2. It has a plurality of gears and an internal gear that encloses these gears and meshes with each gear, and the shaft of the one gear is non-rotating and has a gaseous carbon dioxide supply hole in its axis, and this A carbon dioxide gas passage is drilled in a radial direction from the outer circumferential surface of the shaft to communicate with the supply hole, and a carbon dioxide gas passage is bored in the gear supported by the shaft to communicate from the inner circumferential surface of the gear to the tip surface of each tooth. The carbon dioxide gas passage of the shaft and the carbon dioxide gas passage of the gear are formed so that when the tooth surfaces of the teeth of the gear are in contact with the tooth surfaces of the internal gear and the bottom portions thereof are sealed, the carbon dioxide gas passage of the shaft and the carbon dioxide gas passage of the gear are formed. Sterilizer manufacturing equipment equipped with a geared stirring device.