JPS59221227A - Method of sterilizing inside of vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides hydrogen peroxide (H
Conventionally, H1O! Sterilization of the inside of the container by spraying is performed using Hlo, which is fixed above the container, and 1 liter from the spray nozzle.
This was done by spraying O. into the container.

When this method is used, there is often unevenness in the way H2O adheres to the inner surface of the container, and this tendency is particularly noticeable when the depth of the container is large relative to the area of the opening of the container. Therefore, it was difficult to completely sterilize the inside of the container.

In addition, H! to the inner surface of the container! 0. Used to prevent sterilization failure due to uneven adhesion of H! At 0°, there is a high concentration of 35% Hlo, and such a high concentration not only requires careful handling, but also causes serious environmental pollution if steam or gaseous Hlo leaks outside the device, making it difficult for operators to handle it. It was not favorable for. Furthermore, since n, o, and sterilization are liquid, wet sterilization is required, and H7 is fixed above the container.
In the method of spraying H30 from a 0° spray nozzle, even if a large drying process is introduced, the H30,
In addition to uneven adhesion, the use of 35% H,0 caused poor drying.

The purpose of the present invention is to solve this problem, and the purpose is to spray the mountain O1 evenly on the inner surface of the columnar container by relatively moving the columnar container and the spray nozzle so that the spray nozzle enters the opening of the container and moves up and down. This is to pre-sterilize the inside of the container with a lower H70 concentration and a smaller amount of aqueous solution adhering to the inner surface of the container, and at the same time sterilize the inside of the container with aseptic heating in the subsequent process. This is achieved by making it easy to sterilize and dry the inside of the container using air.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3.

In FIG. 1, an aseptic filling and packaging machine 1 is a device that aseptically fills liquid (e.g. juice, milk, etc.) into a columnar forming carton C as shown in FIG. 2, and a closed chamber part 3 provided adjacent to this and always in a positive pressure state, and both of these parts 2
, 3, the carton C is conveyed while being gripped by a traveling chain 4.

The forming section 2 has mandrels 5, 5 by which the bottom of the carton is formed.

The sterile room section 3 includes a detection section 6 that detects molding defects in cartons, a preliminary sterilization section 7 that sprays HREW, and a HNO3
a sterilization section 8 that dries and sterilizes the inner surface of the carton that has been sprayed with water, a primary folding section 9 that folds the top of the carton, a filling section 10 that fills the carton with juice, etc.; It consists of a secondary folding part 11 for closing the opening by folding the carton, a top heating part 12 that heats the carton compartment with hot air, and a top pressure sealing part 13 that presses and seals the heated carton compartment. ing.

The preliminary sterilization section 71 is provided with a mechanism in which spray nozzles 14, 14 for spraying n, o, extend vertically, and the carton C extends vertically relative to the spray nozzles 14. The mechanism may be a vertically driven support stand 15 as shown in FIG. The top heating section 12 has a drying nozzle 19 for ejecting hot air.

The carton C whose bottom part has been molded in the molding section 2 is sent to the detection section 6.
The quality of the carton's molding is detected as it passes through the
If it is defective, the device will be stopped. The carton C that has arrived at the preliminary sterilization section 7 is lifted up by the support a15 as shown in FIG. 3. At this time, the nozzle 14 is inserted into the carton to an appropriate depth.

The support stand 5, which has been raised to a certain height, is then lowered, and along with this, H2O2 is sprayed from the nozzle 14.

In this way, if the nozzle 14 is inserted into the carton C, and the carton C is lowered and sprayed with H80, the 1 (tow) will be evenly attached to the inner surface of the carton, and even if the carton is deep, f(t C) on average to the bottom
ffi will be attached.

The carton C that has undergone preliminary sterilization is dried by combustion air in the sterilization section 8, but the H, U, and
Sterilization is achieved by increasing the concentration of . After passing through the liquid filling section 10, top heating section 12, and top pressure sealing section (3), the filling and packaging process in an aseptic state is completed.

In the preliminary sterilization section 7 of the sterile light J3J4 loading machine 1,
The bottom seal carton C is moved up and down by the support stand 15, but the bottom seal carton C is not moved up and down.
The spray nozzle 7 may be moved up and down.

(2) H, O, and HzOt are sprayed from the spray nozzle 14 when the bottom seal carton C descends in relative vertical motion, but when the bottom seal carton C ascends in relative vertical motion, H10!H from spray nozzle 7, 0 may be sprayed.

Next, the results of the sterilization test and the measurement of residual H*Ot (lk K) of the bottom seal carton C in the above example will be shown. Bacillus subtilis spores can be completely sterilized and residual amount is 1 t O
The concentration is 0 when the carton is filled with pure water in the regular filling amount. H80° manufacturing, HtOt below lppm
This figure shows the area determined by three factors: the amount of aqueous solution attached and the weight of attached l1tot.

In FIG. 2, the horizontal axis represents Ha Ot H8 degrees in logarithmic form, and the vertical axis represents the amount (g/an'') of the H20° aqueous solution deposited on the inner surface of the carton.

According to the method of the present invention, H! It can be sterilized sufficiently even if the Of concentration is within 1 to 20%, and H! There is no need to use a 0% solution.

For complete sterilization, apply 6.7XIQ-'g to 2.7XIQ-'g of Hl per unit area (♂) on the inner surface of the carton.
o, the deposited weight is required, but 6.7XlO"-"g
/crIL'' line is indicated by a, 2.7 x 10-
The straight line of 'g/cwL' is shown by b, and if the absolute weight of the aqueous solution is less than 10'g/lx', the entire inner surface of the carton will not be sprayed due to the size of the spray particles, so there is a lower limit to the absolute amount of aqueous solution. This lower limit line is shown by the straight line C.

A deformed pentagon (ABCDE) is formed by the straight lines a, b, c, etc., and this range is the range that can be completely sterilized. Point A is Hlo, and the amount of aqueous solution attached is 2.7X 10" g
%1 m', the lower limit line c is at a value where the amount of H*ot aqueous solution is 6.7 XIO' gΔ♂.

As explained above, in the present invention, the columnar container and the spray nozzle are moved upward relative to each other, and the spray nozzle enters the opening of the container and moves up and down, thereby applying H to the inner surface of the columnar container. 0. Spray it evenly and apply 21. This method pre-sterilizes the inside of the container with H*O at a lower concentration and the amount of aqueous solution adhering to the inner surface of the container.At the same time, the container is sterilized with sterile heated air in the subsequent process Since the interior can be easily sterilized and dried, the device for sterilizing and drying can be downsized, thereby reducing the amount of energy used for sterilizing and drying, and the inner surface of the columnar container 1cIIL! It can completely sterilize Bacillus subtilis spores of 1 cm per container, and can reduce the residual H10 and concentration to 0.1 PPm when the container is filled with a specified amount of pure water.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing an example of a liquid filling and packaging machine using a columnar shaped carton, and Fig. 2 shows a machine that can sterilize 10' Bacillus subtilis spores per 1 cTrL'' attached to the inner surface of a columnar container. A graph showing a region determined by three factors: H, 0□ concentration, utot aqueous solution concentration, and attached H2O1 weight, where the accumulated HzOt* degree is 0.1 ppm or less when the columnar container is filled with a specified amount of pure water. Figure 3 is a perspective view explaining the operation of the spray nozzle and the carton. 1... Aseptic filling and packaging machine, 2... Carton forming section, 7
...Preliminary sterilization section, 8.. Sterilization section, 10.. Filling section, 12.. Top heating section, 14.. Spray nozzle. Applicant's agent: Kiyoshi Inomata H2O2 concentration (%) Procedural amendment July 1, 1987 Commissioner of the Japan Patent Office Kazuo Wakasugi 1, Indication of the case 1982 Patent Application No. 94123 2, Name of the invention Inside the container Sterilization method 3, patent applicant related to the case of the person making the amendment (289) Dai Nippon Printing Co., Ltd. 7, specification and drawings subject to amendment. 8. Print out the detailed description of the amendment and the drawings as attached (no changes to the contents).

Claims (1)

[Claims] 1. A spray nozzle that sprays hydrogen peroxide (HyOt) is provided while the columnar container is moving through a sterile atmosphere under constant positive pressure, and the columnar container and the spray nozzle are moved relative to each other. A spray nozzle is inserted into the mouth of the container, then pulled out, and a low concentration and small amount of H,
A method for sterilizing the inside of a container, which comprises pre-sterilizing the inside of the container by spraying it evenly and then sterilizing and drying the inside of the container with sterile heated air. 2. The method for sterilizing the inside of a container according to claim 1, wherein the concentration of hydrogen peroxide sprayed onto the inner surface of the columnar container is in the range of 1% to 20%. 3. The hydrogen peroxide aqueous solution sprayed onto the inner surface of the columnar container has a range of 6.7 x 10'g/cm"~
A method for sterilizing the inside of a container according to claim 1 or 2, characterized in that the amount of gΔ is 2. 6゜7 x 10'g, J is ~2.7 x
10--Δ♂ The method for sterilizing the inside of a container according to any one of claims 1 to 3.