JP2006248617A - Method for sterilizing packaging material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To sterilize an outer surface of a packaging material uniformly and efficiently enough by forcibly filling the inside of a chamber with a hydrogen peroxide mist condensed by vaporizing a hydrogen peroxide (H<SB>2</SB>O<SB>2</SB>) water solution, and also by agitating the mist. <P>SOLUTION: The sterilization of the packaging material is carried out by generating an air stream by compressed air within the chamber for applying the hydrogen peroxide mist condensed by vaporizing the hydrogen peroxide water solution to the surface of the packaging material by forcibly filling the inside of the chamber with the hydrogen peroxide mist by the air stream, and also by applying the hydrogen peroxide mist to the surface of the package material while agitating. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a packaging material sterilization method, and more particularly to a packaging material sterilization method capable of uniformly sterilizing the entire outer surface of a packaging material such as a PET bottle.

  For example, so-called PET (polyethylene terephthalate) bottles are widely used in containers for soft drinks such as fruit juice drinks and coffee. When producing aseptically filled products using these PET bottles, foods are used prior to filling. In addition to the inner surface of the bottle storing the bottle, sterilization of the outer surface of the bottle is also necessary from the viewpoint of preventing contamination of food during filling or maintaining the sterility of the aseptic filling system.

Conventionally, as a method of sterilizing the outer surface of such a molded container, after spraying a sterilizing liquid such as an aqueous solution of hydrogen peroxide (H ₂ O ₂ ) at room temperature or warming on the container, it is dried by blowing hot air. A so-called spray method or a so-called dipping method in which the surface of a molded container is brought into contact with a sterilizing solution for a certain time and then washed with sterile water has been used.

  However, if a large container such as a PET bottle is sterilized by the so-called spraying method, a large number of spray nozzles are required and the spraying pressure of the sterilizing liquid particles is high, so that the fine particles adhering to the container surface There is a disadvantage that the particles become large and uniform adhesion to the entire surface of the container is difficult, and as a result, drying becomes difficult.

  Also in the so-called soaking method described above, in order to ensure the sterilizing effect of the container, it is necessary to maintain the state where the surface of the container is in contact with the sterilizing solution for a time in minutes. In the case of a container having a high filling speed as described above, there is a drawback that the filling system becomes large-scale, the equipment cost becomes high, and the equipment maintenance becomes complicated.

  By the way, the present inventor utilizes a fine sterilizing liquid mist generated by heating and vaporizing the sterilizing liquid and condensing the obtained sterilizing gas as a sterilizing liquid adhesion method instead of the above-described so-called spray method. A method and a method for sterilizing the outer surface of a molded container using the method are proposed.

  However, even in this sterilization method, the entire outer periphery of the packaging material is surrounded by a cylindrical body in order to effectively attach the sterilizing liquid mist to the outer surface of the packaging material. There is a drawback that it is difficult to do.

Therefore, in order to find a means that enables more efficient sterilization of packaging materials such as PET bottles, the present inventor has a reflector 101 of H ₂ O ₂ mist in the chamber 100 as shown in FIGS. A sterilizer equipped with a prototype was made and studied. Here, FIG. 15 is explanatory drawing which shows the outline of the inlet_port | entrance part of a sterilizer, FIG. 16 is explanatory drawing which shows the outline of the side of the apparatus. This sterilizer includes a chamber 100 covered with an acrylic resin hood 102, a conveying means 103 using a belt conveyor, and a mist spraying means 106 provided with a spray nozzle 105 at the tip of a spray pipe 104. is there. In this sterilizer, a packaging material 60 such as a PET bottle is conveyed by the conveying means 103. On the other hand, H ₂ O ₂ mist is sprayed from the spray nozzle 105 toward the top of the packaging material 60. The sprayed H ₂ O ₂ mist directly adheres to the outer surface of the packaging material 60 and is reflected by the reflecting plate 101 to adhere to the lower part of the outer surface of the packaging material 60. That is, this sterilization apparatus has a sufficient amount of H ₂ O ₂ mist sprayed from the spray nozzle 105 directly attached to the surface of the packaging material 60 and reflected by the reflector 101 to the lower part of the outer surface of the packaging material 60. The outer surface of the packaging material 60 is uniformly and sufficiently sterilized by adhering H ₂ O ₂ mist.

However, as a result of repeated studies by the present inventor, even in the sterilization apparatus having such a configuration, the H ₂ O ₂ mist sprayed from the spray nozzle 105 hardly adheres to portions other than the upper portion of the packaging material 60 such as a PET bottle. not, the remaining H ₂ O ₂ mist of non-H ₂ O ₂ mist adhering to the packaging material 60, it was confirmed that only drifting upward in the chamber 100, still even by such a sterilizing apparatus PET It has been found that it is difficult to uniformly and sufficiently sterilize the outer surface of a packaging material such as a bottle. In particular, when the object to be sterilized is a PET bottle, a sufficient amount of H ₂ O ₂ mist adheres to the relatively smooth surface of the outer surface of the bottle, but a capping screw, support ring, etc. Therefore, there is a problem that it is difficult to uniformly apply an appropriate amount of H ₂ O ₂ mist to the above-described site.

  The present invention has been made based on such circumstances, and an object of the present invention is to provide a packaging material sterilization method capable of uniformly and sufficiently sterilizing the outer surface of a packaging material such as a PET bottle. And

  In order to achieve the above object, the gist of the present invention is to provide a hydrogen peroxide mist in a packaging material sterilization method in which a hydrogen peroxide mist obtained by vaporizing and condensing an aqueous hydrogen peroxide solution is adhered to the surface of the packaging material. An air flow by compressed air is generated in the chamber for adhering to the surface of the packaging material, and the hydrogen peroxide mist is forcibly filled in the chamber by the air flow and the hydrogen peroxide mist is stirred while stirring. A sterilization method for a packaging material, characterized in that the packaging material is adhered to the surface of the packaging material.

  According to the present invention, since the above-described configuration is adopted, it is possible to disperse the fine hydrogen peroxide mist condensed by vaporizing the aqueous hydrogen peroxide solution to every corner of the chamber. It is possible to provide a packaging material sterilization method capable of sterilizing the outer surface of the packaging material efficiently and in a short time by depositing an appropriate amount of hydrogen peroxide mist uniformly over the entire surface.

  When the aqueous hydrogen peroxide solution is vaporized and then condensed, fine hydrogen peroxide mist is generated. Next, the hydrogen peroxide mist is sprayed toward the packaging material in the chamber and an air flow is generated by compressed air in the chamber to forcibly fill the hydrogen peroxide mist in the chamber and agitate. To do. In this way, the hydrogen peroxide mist is sprayed toward the packaging material in the chamber, and further, an air flow is generated in the chamber, so that the hydrogen peroxide mist reaches every corner in the chamber. Therefore, according to this sterilization method, even if the packaging material has a complicated shape such as a PET bottle, an appropriate amount of hydrogen peroxide mist adheres to every corner of the outer surface. Is uniformly and thoroughly sterilized throughout.

  On the other hand, the sterilization apparatus of the present invention includes a chamber, a packaging material conveying means for conveying a packaging material such as a PET bottle into the chamber, a mist spraying means for spraying hydrogen peroxide mist into the chamber, and the mist. A mist reflector that reflects the hydrogen peroxide mist sprayed into the chamber by spraying means toward the packaging material, and a compressed air supply that supplies compressed air to the chamber to generate an air flow in the sealed space. Means. In this sterilizer, the packaging material is first conveyed into the chamber by the packaging material conveying means. When the packaging material is conveyed into the chamber, hydrogen peroxide mist is continuously ejected from the mist spraying means into the chamber. In this way, compressed air is further supplied from the compressed air supply means into the chamber in which the hydrogen peroxide mist is sprayed. This compressed air generates an air flow in the chamber, and the hydrogen peroxide mist is forcibly filled in the chamber and stirred, so that the hydrogen peroxide mist uniformly reaches every corner of the chamber. When the packaging material is conveyed and passed through the chamber in such a state by the packaging material conveying means, the hydrogen peroxide mist is sprayed directly from the spray nozzle onto the packaging material and reflected by the reflector. Alternatively, the hydrogen peroxide mist which is filled and stirred in the chamber adheres to the packaging material, and finally the packaging material is placed in the chamber with the hydrogen peroxide mist uniformly adhered to the entire outer surface of the packaging material. It is carried outside. Therefore, in this sterilization apparatus, a sufficient amount of hydrogen peroxide mist can be uniformly attached to the entire outer surface of the packaging material, and the entire outer surface of the packaging material is uniformly and sufficiently sterilized. be able to.

  Further, in such a sterilization apparatus, in particular, when the ejection port of the mist spraying means is disposed to face the side surface of the mouth of the packaging container conveyed by the packaging material conveying means, the packaging container mouth is When passing in front of the spray outlet of the spraying means, hydrogen peroxide mist is sprayed directly on the side surface of the packaging container mouth, for example, a structure such as a capping screw or a support ring on the packaging container mouth Even if an object is provided, a sufficient amount of hydrogen peroxide mist can be stably adhered. In addition, the hydrogen peroxide mist remaining in the chamber without adhering to the outer surface of the packaging container in the above process and the hydrogen peroxide sprayed in the chamber when the mouth of the packaging container does not pass in front of the jet port The mist fills the chamber and is agitated by the air flow generated by the compressed air blown into the chamber, and uniformly adheres to the outer surface other than the mouth of the packaging container.

  Further, in this sterilization apparatus, when an air jet for generating an air flow along the surface of the mist reflector is provided, the compressed air ejected from the air jet will flow along the surface of the mist reflector. This hydrogen flow causes hydrogen peroxide mist to flow along the surface of the mist reflector, and evenly fills the chamber.

  Furthermore, in this sterilization apparatus, when a spacer that forms a gap between the bottom surface of the packaging material and the conveyance path surface is provided on the conveyance path constituting the packaging material conveyance means, the packaging material is placed on the spacer. By doing so, hydrogen peroxide mist adheres evenly to the bottom surface of the packaging material.

  In such a sterilization apparatus, the mist spraying means is formed by using a supply unit body composed of a two-fluid spray in which a compressed air supply source and a hydrogen peroxide supply source are connected. A metering pump is provided between the main body of the supply unit and the aqueous hydrogen peroxide solution is supplied to the main body of the supply unit by this metering pump, so that the spray amount of the hydrogen peroxide mist can be adjusted to a desired amount very easily and stably. It becomes possible to set.

  An embodiment of the present invention will be described below with reference to the drawings.

  FIG. 1 is an explanatory diagram showing an outline of a side surface of an example of a sterilizer according to the present invention.

  As shown in FIG. 1, the sterilizer includes a mist spraying means 2, a mist reflector 3, a packaging material transport means 4, and a compressed air supply means 5 in a chamber 1.

  More specifically, as shown in FIG. 1, the chamber 1 is formed so as to be covered with an acrylic hood 11.

  FIG. 2 is an explanatory view showing details of an example of the mist spraying means 2. As shown in FIG. 2, the mist spraying means 2 includes a hydrogen peroxide aqueous solution supply section 21 that supplies a hydrogen peroxide aqueous solution, and a hydrogen peroxide aqueous solution supplied from the hydrogen peroxide aqueous solution supply section 21 by a heating means 22. A vaporizing section 23 that is heated to a temperature equal to or higher than the boiling point and vaporizes.

A two-fluid spray is used for the supply unit main body 21 a constituting the hydrogen peroxide solution supply unit 21. A nozzle 21b is connected to the supply body 21a via an extension pipe 24. This is because heat from the vaporizing pipe 23a forming the vaporizing section 23 is transmitted to the supply section main body 21a via the aluminum plug 25 and the nozzle 21b closing the upper portion of the vaporizing pipe 23a, and the supply section main body 21a. This is to prevent the heat from being heated. The vaporizing pipe 23a includes, for example, an outer cylinder 26 made of asbestos ribbon, an inner cylinder 27 made of a sanitary pipe that forms the outer wall of the vaporizing pipe 23a, and heating means 22 provided between the outer cylinder 26 and the inner cylinder 27. Become. A spray nozzle 20 is connected to the lower end of the vaporizing tube 23a. In the spray nozzle 20, the packaging material 60 conveyed by the packaging material conveying means 4 is a packaging container such as a PET bottle in which a structure such as a capping screw or a support ring is formed at the mouth. In this case, it is desirable to be disposed at a position facing the side surface of the mouth, specifically, at a position where the H ₂ O ₂ mist is sprayed substantially from the side toward the vicinity of the upper brim portion. That is, the vicinity of the brim portion of the upper portion of the PET bottle is a portion where mist is difficult to adhere, and when H ₂ O ₂ mist is sprayed from right above the PET bottle toward this portion, the upper portion of the PET bottle is This is because it is difficult to attach H ₂ O ₂ mist to the back side of the brim part or the lower part of the bottle. In FIG. 2, 71 is an H ₂ O ₂ aqueous solution inlet, and 72 is a spraying air inlet for supplying compressed air, which are connected to a hydrogen peroxide supply source and a spraying compressed air supply source (not shown), respectively.

  In the vaporizing pipe 23a, it is important not to create a place where the temperature is low or a place where the temperature is likely to be lowered in order to average the vaporization. ing. Further, the diameter of the vaporizing tube 23a is set to be sufficiently large so that no pressure is applied to the inside of the tube when the aqueous hydrogen peroxide solution is sprayed from the nozzle 21b connected to the supply unit main body 21a via the extension pipe 24. Moreover, the inner surface of the vaporizing tube 23a is formed smoothly so that hydrogen peroxide vaporized in the tube can be easily removed.

  In this sterilization apparatus, it is preferable to provide a metering pump between the hydrogen peroxide supply source (not shown) and the mist spraying means 2 and supply the hydrogen peroxide aqueous solution to the mist spraying means 2 by this metering pump.

  FIG. 3 is an explanatory diagram showing an example in which a metering pump 50 is provided between the hydrogen peroxide supply source 81 and the mist spraying means 2.

  As shown in FIG. 3, the metering pump 50 is provided between a supply unit main body 21 a made of a two-fluid spray and a hydrogen peroxide supply source 81, and the aqueous hydrogen peroxide solution in the hydrogen peroxide supply source 81 passes a strainer 90. Then, the aqueous solution of hydrogen peroxide sucked by the metering pump 50 is discharged and supplied to the supply unit main body 21a composed of a two-fluid pump at a constant rate. On the other hand, for example, as shown in FIG. 3, the compressed air is supplied to the supply unit main body 21a composed of a two-fluid pump through two systems of cylinder air and atomizing air through a control valve 91, respectively.

  Moreover, the supply system of the hydrogen peroxide solution to the mist spraying means 2 can also be configured by adopting a so-called pressure spray system. Specifically, as shown in FIG. 4, an aqueous hydrogen peroxide solution is housed in a sealed tank 82, compressed air is introduced into the tank 82 and pressurized, and the aqueous hydrogen peroxide solution is added by this pressure. What is necessary is just to supply to the supply part main body 21a which consists of a fluid pump. In FIG. 4, 90 is a strainer, 92 is a regulator, and 93 is a pressure gauge. However, when the hydrogen peroxide aqueous solution supply system to the mist spraying means 2 is configured as shown in FIG. 4, in order to make the spray amount of the hydrogen peroxide mist a desired amount, the supply unit from the pressurized tank 82 is used. It is necessary to control each of the supply pressure of the aqueous hydrogen peroxide solution to the main body 21a and the pressure of the atomizing air in the two compressed air supply systems to a predetermined pressure value. On the other hand, as shown in FIG. 3, when the metering pump 50 is used, it is possible to set the spray amount of the hydrogen peroxide mist to a desired amount by controlling only the discharge amount of the metering pump 50. is there.

  In this mist spraying means 2, the aqueous hydrogen peroxide solution supplied from the aqueous hydrogen peroxide solution supply unit 21 is heated to a temperature equal to or higher than the boiling point by the vaporizing tube 23 a provided with the heating means 22, completely vaporized, and vaporized disinfectant. Is sprayed into the chamber 1 from a spray nozzle 20 provided in the chamber 1.

  In the sterilization apparatus shown in FIGS. 1 and 5, the mist reflector 3 surrounds the tip of the compressed air nozzle 51 of the compressed air supply means 5 provided in the chamber 1 formed by being covered with the acrylic hood 11. Thus, the hydrogen peroxide mist sprayed into the chamber 1 from the tip of the spray nozzle 20 is reflected toward the packaging material 60. Here, an acrylic resin plate is used as a material for forming the mist reflecting plate 3. More specifically, as shown in FIG. 5, the mist reflector 3 is configured such that two acrylic resin plates 31 are provided in the chamber 1 so as to sandwich the tip of the compressed air nozzle 51. The stagnation angle θ of the compressed air nozzle 51 by the two acrylic resin plates 31 is appropriately determined according to the size and shape of the packaging material 60 to be sterilized, the mounting height of the compressed air nozzle 51 in the chamber 1, and the like. Therefore, it is difficult to determine uniformly, but as an example, the packaging material 60 is a PET bottle with a maximum diameter of 90 mm and the mounting height of the spray nozzle 20 in the chamber 1 is 300 mm. The stagnation angle θ (see FIG. 16) is 45 °. Moreover, it is preferable that the mist reflector 3 covers about 1/2 of the total height of the packaging material. As shown in FIG. 6, the acrylic hood 11 may also serve as the mist reflector 3 by forming the ceiling portion of the acrylic hood 11 covering the chamber 1 in a ship bottom shape.

  As shown in FIGS. 6 and 7, it is preferable to provide an air jet 6 for generating an air flow along the surface of the mist reflector 3 in the chamber 1. The remainder of the hydrogen peroxide mist sprayed from the spray nozzle 20 and partly adhered to the outer surface of the packaging material 60 by the gentle air flow ejected from the air ejection port 6 along the surface of the mist reflector 3. It flows in the direction of the packaging material 60 along the gradient of the mist reflector 3 without adhering to the surface of the mist reflector 3.

  FIG. 8 is an explanatory view showing an outline of the air pipe 15 in which an air jet port is formed.

  As shown in FIG. 7, the air jet nozzle 6 is formed in the position facing the spray nozzle 20 attached to each of the mist reflecting plates 3 facing each other. In this embodiment, the air outlet 6 is formed in an air pipe 15 provided at a butt portion (top) of the ceiling portion of the chamber 1. As shown in FIG. 8, the air pipe 15 is also formed with a compressed air outlet 51 of the compressed air supply means 5 for blowing compressed air vertically downward. A compressed air supply source (not shown) is connected to the air pipe 15. In the sterilization apparatus shown in FIG. 7, the compressed air supply means 5 and the air jet 6 share one air pipe 15, but the compressed air supply means 5 and the air jet 6 have two systems or It can also be formed by three compressed air supply systems.

  The packaging material conveying means 4 is configured using a belt conveyor 41. The packaging material 60 such as a PET bottle is continuously carried into the chamber 1 while being placed on the belt conveyor 41, passes through the vicinity of the spray nozzle 20 surrounded by the mist reflector 3, and is further conveyed. And is carried out of the chamber 1. Then, on the belt conveyor 41 that forms the conveyance path of the packaging material conveyance means 4, as shown in FIG. 9, a spacer 42 that forms a gap between the conveyance path surface of the belt conveyor 41 and the bottom surface of the packaging material 60. Is preferably provided. By placing the packaging material 60 on the spacer 42, an appropriate amount of hydrogen peroxide mist can be adhered to the bottom surface of the packaging material 60. When the packaging material 60 placed on the spacer 42 is a packaging container such as a PET bottle, the spacer 42 may be arranged as shown in FIG. 10, for example. Here, the height of the spacer 42, that is, the distance between the conveyance path surface of the belt conveyor 41 and the bottom surface of the packaging material 60 usually needs about 0.5 to 5 cm. If this interval is shorter than 0.5 cm, it may be difficult to uniformly attach a sufficient amount of hydrogen peroxide mist to the bottom surface of the packaging material 60. On the other hand, even if the length is longer than 5 cm, the equivalent effect is not achieved, and the size of the apparatus is increased. Further, when the packaging material 60 is a cap of a packaging container such as a PET bottle, for example, as shown in FIG. 11, a cap carrier 43 provided with a blade-like spacer 42 is placed on the belt conveyor 41. Then, a cap such as a PET bottle as the packaging material 60 may be placed on the blade-like spacer 42. According to this sterilization apparatus having such a packaging material conveying means 4, even if the packaging material 60 has many irregularities such as a cap such as a PET bottle and has a complicated shape, a sufficient amount is provided to every corner. Hydrogen peroxide mist can be attached and sterilization can be performed efficiently in a short time. In this sterilization apparatus, if necessary, drying means for removing the sterilization liquid film formed by the hydrogen peroxide mist adhering to the surface of the packaging material 60 may be provided.

  The compressed air supply means 5 for generating an air flow in the chamber 1 includes, for example, a compressed air nozzle 51 connected to a compressed air source (not shown), and the compressed air is indicated by an arrow in FIG. 1 or FIG. So as to be supplied into the chamber 1. The compressed air nozzle 51 is usually provided on the top plate portion 11 a of the acrylic resin hood 11 forming the chamber 1, and the compressed air supplied from the compressed air nozzle 51 generates an air flow in the chamber 1. The hydrogen peroxide mist sprayed into the chamber 1 from the spray nozzle 20 constituting the mist spraying means 2 and reflected toward the packaging material 60 by the mist reflector 3 is supplied from the compressed air nozzle 51 into the chamber 1. The chamber 1 is forced to fill the chamber 1 by the air flow generated by the compressed air, and stirred to reach every corner of the chamber 1. Therefore, in this sterilization apparatus, a sufficient amount of hydrogen peroxide mist adheres uniformly and over the entire outer surface of the packaging material 60.

  Next, experiments on the effects of atomizing air pressure on the amount of hydrogen peroxide mist deposited when a metering pump is used as the means for supplying the hydrogen peroxide aqueous solution to the two-fluid spray and when the pressurization method is adopted An example is shown.

(Experimental example 1)
Using the sterilizer configured as shown in FIG. 5, the hydrogen peroxide solution is supplied to the two-fluid spray by a metering pump, and hydrogen peroxide mist is continuously sprayed into the chamber 1 under the following conditions and compressed air. Compressed air is fed from the nozzle 51 to fill the hydrogen peroxide mist, and the amount of hydrogen peroxide mist adhering per unit area near the bottle shoulder is measured by passing the PET bottle through the hydrogen peroxide mist. did.

Measurement condition;
Hydrogen peroxide solution (35%) supply rate: 40 g / min
Atomizing air pressure: 2-5kg / cm ²
Sterilized packaging material: 1.5 liter PET bottle Bottle transport speed: 15 cm / sec
Furthermore, the same experiment was performed by changing the atomizing air pressure of the two-fluid spray while keeping the supply rate of the aqueous hydrogen peroxide solution constant, and the relationship between the atomizing air pressure and the amount of hydrogen peroxide deposited was investigated.

  The results are shown in FIG.

  From FIG. 12, it was confirmed that the higher the atomizing air pressure, the larger the hydrogen peroxide adhesion amount. Therefore, in this case, it was confirmed that it is necessary to set optimum conditions according to the situation because the atomizing air pressure is also a parameter that affects the sterilizing effect.

  On the other hand, when the relationship between the supply rate of the aqueous hydrogen peroxide solution and the atomizing air pressure was examined for two supply rates, the results shown in FIG. 13 were obtained.

  As is apparent from FIG. 13, when the hydrogen peroxide solution is supplied to the two-fluid spray by a metering pump, the supply rate of the hydrogen peroxide solution does not depend on the atomizing air pressure, so the atomizing air pressure is changed. There is no need to readjust the metering pump.

(Experimental example 2)
In Experimental Example 1, the hydrogen peroxide aqueous solution was supplied to the two-fluid spray by using a pressurization method instead of supplying the hydrogen peroxide aqueous solution to the two-fluid spray by a metering pump. The relationship between the supply speed and the atomizing air pressure was investigated in the same manner as in the above.

  The results are shown in FIG.

  When the hydrogen peroxide aqueous solution is supplied to the two-fluid spray from FIG. 14 by the pressurization method, the supply speed also changes depending on the atomizing air pressure. It was confirmed that it was necessary to readjust the pressure conditions of the aqueous hydrogen peroxide solution in order to obtain the supply rate.

It is a schematic side view showing an example of the packaging material sterilization apparatus of the present invention. It is explanatory drawing which shows an example of the mist spraying means in the sterilization apparatus of the packaging material of this invention. It is explanatory drawing which shows the structural example of the supply system of the hydrogen peroxide aqueous solution and compressed air to the mist spraying means in the sterilization apparatus of the packaging material of this invention. It is explanatory drawing which shows the other structural example of the supply system of the hydrogen peroxide aqueous solution and compressed air to the mist spraying means in the sterilization apparatus of the packaging material of this invention. It is explanatory drawing which shows the outline of the inlet_port | entrance part in an example of the sterilization apparatus of the packaging material of this invention. It is explanatory drawing which shows the outline of the inlet_port | entrance part in another example of the sterilization apparatus of the packaging material of this invention. It is the side schematic diagram which shows another example of the disinfection apparatus of the packaging material of this invention. It is partial explanatory drawing which shows an example of the air pipe in the sterilization apparatus of the packaging material of this invention. It is the side schematic diagram which shows another example of the disinfection apparatus of the packaging material of this invention. It is explanatory drawing which shows an example of the conveyance path which comprises the packaging material conveyance means in the sterilization apparatus of the packaging material of this invention. It is the side schematic diagram which shows another example of the disinfection apparatus of the packaging material of this invention. It is a graph which shows the relationship between the hydrogen peroxide mist adhesion amount and atomizing air pressure at the time of supplying hydrogen peroxide aqueous solution to a two-fluid spray with a metering pump in the sterilization apparatus of a present Example. It is a graph which shows the relationship between hydrogen peroxide aqueous solution supply speed | rate and atomizing air pressure at the time of supplying hydrogen peroxide aqueous solution to a two-fluid spray with a metering pump in the sterilizer of a present Example. In the sterilization apparatus of the present embodiment, a graph showing the relationship between the hydrogen peroxide solution supply speed and the atomizing air pressure when the hydrogen peroxide solution is supplied to the two-fluid spray using a pressurization method. is there. It is explanatory drawing which shows the outline of the inlet_port | entrance part in an example of the sterilization apparatus of the packaging material of this invention. It is a schematic side view showing an example of the packaging material sterilization apparatus of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Chamber 2 ... Mist spraying means 3 ... Mist reflector 4 ... Packaging material conveyance means 5 ... Compressed air supply means 6 ... Air outlet 21a ... Supply part main body 42 ... Spacer 50 ... Metering pump 60 ... Packaging material 82 ... Peroxidation Hydrogen source

Claims (1)

In the sterilization method of the packaging material, the hydrogen peroxide mist obtained by condensing after vaporizing the aqueous hydrogen peroxide solution is attached to the surface of the packaging material.
A hydrogen peroxide mist outlet for spraying the hydrogen peroxide mist is installed opposite the side surface of the mouth of the packaging material, and the hydrogen peroxide mist is directly supplied from the hydrogen peroxide mist outlet to the mouth of the packaging material. An air flow is generated by compressed air in a chamber that is attached to a side surface and the hydrogen peroxide mist is attached to the surface of the packaging material, and the hydrogen peroxide mist is forced into the chamber by the air flow. A packaging material sterilization method, comprising filling and stirring the hydrogen peroxide mist on the surface of the packaging material.

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