JPH0356221A - Sterilizing method for packaging material - Google Patents

Abstract

PURPOSE:To make it possible to perform a favorable sterilization for packaging material by simple process and device by blowing hot air, which contains hydrogen peroxide vapor, to packaging material. CONSTITUTION:To a hydrogen peroxide water solution 3 in a sterilizer tank 2, compressed air is sent in through a compressed air feeding pipe 4, and air, which contains hydrogen peroxide vapor, is formed by passing through the hydrogen peroxide water solution 3. The air, which has passed through the water solution 3 and contains hydrogen peroxide vapor, is sent to a mixing nozzle 5 from the sterilizer tank 2 through a connection pipe 6, which is heated by a heater, etc. so that the hydrogen peroxide vapor or steam would not be condensed, and is mixed with hot air, which is fed from a hot air feeding pipe 7, at the mixing nozzle 5, and blown to a container 1. At this time, since the hydrogen peroxide, which is blown to the container 1, is a vapor, it does not adhere to the container 1, and drying of the container 1 is not necessary. Therefore, by a single process, in which hot air, which contains hydrogen peroxide vapor, is simply blown to the container 1 from the mixing nozzle 5, a sterilization of containers is performed.

Description

[Detailed Description of the Invention] [Field of Application in Industry 7] The present invention is directed to a method for sterilizing packaging of food containers, etc.
1.

[Conventional technology]

With changes in the social goods distribution system, the scope of application of the so-called one-way vanocage system is expanding, and plastic containers are being used as simple packaging containers for various foodstuffs. Many cup-shaped and cylindrical containers made of paper and other materials are being used.

By the way, packaging materials such as containers for such foods require sterilization treatment before use2, and for this reason conventionally, paper containers, plus sennoku containers, and other precept containers have been used. Hydrogen peroxide was commonly used as a sterilization method. In this case, spray an aqueous hydrogen peroxide solution at room temperature or 11 degrees above the container C, or immerse the container in an aqueous hydrogen peroxide solution at room temperature or a warm temperature.
A widely used process is to dry the container by spraying it with hot air. These methods are. It is mainly used as a method for sterilizing containers in aseptic filling machines (see, for example, JP-A-5-5-1-1.05-5 and JP-A-62-4038).

[Problem to be solved by the invention]

however. Such conventional methods include a step of applying an aqueous hydrogen peroxide solution by spraying or dipping. There is a problem in that it requires two steps, including a drying step using hot air blowing G, and therefore requires a large-scale device.

The present invention solves the problems of the prior art from 1 to 1, and provides a method for sterilizing packaging materials that enables good sterilization of packaged publications using simpler steps and equipment compared to conventional methods.
The purpose is to

[Means to solve the problem]

The present inventors. As a result of research to solve these problems, we discovered that when Hono 1 Air containing hydrogen peroxide was sprayed on packaging materials, an extremely high sterilizing effect was achieved. Completed the invention.

That is, the present invention is a packaging characterized by sterilizing one package by blowing air containing hydrogen peroxide into the package 4A. The gist is the three-ingredient bactericidal power method.

In the present invention, 1 package to be sterilized 4/1 bottle
It is not defined as 1+I- and is arbitrary. for example. Even if it is shaped into a canope-shaped, cylindrical, or bag-shaped packaging container using plastic or plastic, or. In that packaging container
[It may be the packaging material before it has been processed.]

Air containing hydrogen peroxide can be made in various ways. Specifically, air is blown into a hydrogen peroxide solution, and hydrogen peroxide is added to the air that has passed through the aqueous solution. Include a sense of humor. After that, this air containing hydrogen peroxide is heated to a desired temperature to form air. A method of merging air with HonoI Air. Examples include a method in which 8 liquid hydrogen peroxide solution is added to Honoto Air (1/-L) and hydrogen peroxide is vaporized.

Depth number of hydrogen peroxide gas contained in air, I
Packaging: It is desirable that the packaging temperature be as high as possible without condensing hydrogen peroxide or water bacteria on the surface of the material.

The temperature of Hono 1 Air containing peroxide water @ Hana Qi is usually 4
Temperature is maintained between 0 and 200°C. If this temperature is lower than <o'c, a sufficient sterilizing effect cannot be obtained. On the contrary, i'M
! The higher the i degree, the greater the sterilizing effect, but if it is too high, the energy cost increases. 1] Injury to one's packaging interest. There is a risk that it will happen. Avoid this+
Because of this, the air temperature limit is set at 200°0.

[Effect]

Gaseous hydrogen peroxide itself has sterilizing power.
It is possible to sterilize one package by blowing hydrogen peroxide into the air at room temperature and blowing it onto the packaging.However, it is possible to sterilize one package. [・When sprayed on packaging material *] in air, it exhibits an extremely high sterilizing effect due to the synergistic effect of hydrogen peroxide and air) and can sterilize the packaging material *] in an extremely short time. I can do it.

Furthermore, in the present invention, hydrogen peroxide is supplied to the packaging +4 material in the form of stems. This eliminates the need for the post-process of drying and removing the hydrogen peroxide that has adhered to it, which is required in the conventional case of applying an aqueous hydrogen peroxide solution by spraying, etc., and simplifies the sterilization process. can.

〔Example〕

An embodiment of the present invention will now be described with reference to FIG. lf+'i.

FIG. 1 is a process diagram schematically showing the state in which packaging material A is sterilized by the method of the present invention, and I is a container which is the packaging material to be sterilized. 2 is a disinfectant tank filled with aqueous hydrogen peroxide solution 3, and 4 is a compressed air supply pipe. 5 is a mixing nozzle. 6
7 is a connection pipe that supplies air from the disinfectant tank 2 to the mixing nozzle 5, and 7 is a connection pipe that supplies air from the disinfectant tank 2 to the mixing nozzle 5. Compressed air is fed into the hydrogen peroxide aqueous solution 3 in the hydrogen peroxide aqueous solution 3 through the compressed air supply pipe 4.
By passing through it, air containing hydrogen peroxide is produced. What is the concentration of hydrogen peroxide contained in this air, the amount of hydrogen peroxide aqueous solution 3? a degree. The temperature I can be varied depending on the quality, pressure, etc. of the compressed air supplied to the aqueous solution.

Water/8 liquid 3 is passed through 1:1, and the air containing hydrogen peroxide and carbon gas comes from disinfectant tank 2. The thin hydrogen peroxide gas or water vapor is sent to the mixing nozzle 5 through a connecting pipe 6 which is heated with a heater etc. to prevent it from condensing. It is mixed with air from the supply pipe 7 and blown into the container 1. In this way, the container 1 is sterilized.

This H, l, :. ．． Since the water peroxide bottle that can be blown into the container 1 is already available, there is no need to dry the 2 containers 1 (=containers without adhesion).Therefore, simply place the mixing nozzle 5 in container 1. The container is sterilized through a single step of blowing air containing hydrogen peroxide.

[Experiment example]

Place 102. Hacillus subtilis spores on the surface of a short stick-shaped aluminum foil (].cm x 3cm). l O'sp
ore/sheet was attached, and then a sterilization test was carried out using the next square.

(1) Example l 35% peroxide solution in a metal tank with an internal volume of 3.
7! 1r 4i'r of 3 kg/ct
i Air flow rate 1. After containing hydrogen peroxide gas by feeding at 5 R/sec and hub ringing. Flow rate 1. 5 1! /sec. 1. 5 0
'C' was mixed with 1/air and sprayed onto the above aluminum foil for 1 second.

(2) Comparative Example I'' In the same manner as in Example I described in Section 2. After adding hydrogen peroxide vapor to the compressed air, the flow rate was 1. ．． ”+1!/sec
The mixture was mixed with Akashaku)' at room temperature and blown onto the above aluminum foil for 1 second.

{3} Comparative Example H Only hot air at 150°C was blown onto the Al tipped foil for 1 second.

Table 1 shows the results of Test 1 above.

From Table 1, the air/l air containing hydrogen peroxide (Example ■) is. Room temperature air containing hydrogen peroxide (Comparative Example I)
) and Hosoto Air Meat (Comparison example ■), it can be seen that an extremely high sterilizing effect can be obtained.

[Table] [Starting effect] As explained above, the present invention simply sprays the air containing ice peroxide onto the package W Ia l:l. Reliable and quick sterilization can be performed with simple operations. Industrially extremely useful packaging material 1
A sterilization method is obtained.

[Brief explanation of drawings]

FIG. 1 is a schematic process diagram showing an embodiment of the method for sterilizing packaging materials according to the present invention. 1 capacity 2 ÷. 2 Killing and closing 7i retank. 31sho 11 chlorinated water J2 water} Capacity & 4 Compressed air supply pipe 5 Mixing nostle 6 Connection pipe 7 Ponoto air supply pipe.

Claims (1)

[Claims] A method for sterilizing packaging materials, comprising sterilizing the packaging materials by blowing hot air containing hydrogen peroxide vapor onto the packaging materials.