JPS60251014A - Method of sterilizing package - 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 (Field of Industrial Application) The present invention relates to a method for sterilizing a package in which a part of the corner after molding is folded over as a packaging form. Here, the folded part is, for example, the hatched part of the bottom part (a) or the head part (b) of a rectangular parallelepiped car 7 (A) as shown in FIG. As shown in Figure 2, the bottom (a) is similar to the rectangular parallelepiped carton.
Or (prior art) Conventionally, in a package having folded portions, after sterilizing the packaging material, the package is filled and sealed while taking measures to prevent secondary contamination. Sufficient sterilization is not carried out except when forming When forming a package before sealing, there are two ways to sterilize the folded part: sterilizing the rolled packaging material in-line/before filling with the contents, and offline forming into the package. After that, or after forming a part, it is sterilized, filled with contents, and sealed tightly.In the former case, a roll of packaging material is sent to the sterilization process. However, from this point on, it is necessary to take measures to prevent secondary contamination by microorganisms (such as converting the entire machine into a clean booth) until the sealing process. Foreign matter may be mixed in when cutting packaging materials, and if paper is used in laminated materials, microorganisms present in the white paper may come out and contaminate the packaging material. When sterilizing the latter shaped cart/cart, the interior of the carton other than the folded parts can be easily sterilized by the above-mentioned sterilization method, but it is difficult to sterilize the microorganisms present in the folded parts. .

C) Problems to be Solved by the Present Invention) In view of the above, the present invention provides a method that facilitates measures against secondary contamination and performs sufficient sterilization. The purpose is to create a completely sterilized and hygienic folded part by sterilizing the folded part at the time of molding the bottom or head.

Means for Solving Problem C) The present invention provides a method for sterilizing a package having a folded portion, in which the unformed After applying a sterilizing chemical to the end of the cylindrical material, heated air improves the sterilizing effect and simultaneously removes the chemical.

A method for sterilizing a package, which comprises melting a runt, crimping the ends, forming the product, and sterilizing the folded portion.

The present invention further includes a rectangular parallelepiped cart as shown in FIG.
will be explained in detail using the sterilizer shown in FIG.

The sterilizer shown in FIG. 3 is surrounded by a sterile chamber α♦, and a mandrel (1) attached to a drive unit such as a conveyor chain (3) moves intermittently between each process.

After forming the rolled packaging material into a cylinder shape, we add ruled lines,
After cutting it into a short tube (2), insert it into the mandrel (1) from the cylindrical packaging material inlet (2) side, and place the bottom or head to be formed on the opposite side of the mandrel drive part for easy forming. [Packaging material mounting process (a)
)”.

After fixing, various sterilizations are performed [sterilization step (b)], and the inner surface of the short tube (2) is heated to melt the sealant in the short tube (2) [heating step (C)''. Immediately after melting, press the
crimping process (d)], forming the bottom (or head) [sealing part cooling process (e), folding part forming process (f), folding part folding process (g)), and then to the filling and packaging department. Transfer to the next filling process (not shown) from the transfer port Q4 [
Conveying Step (h))-0 Next, an embodiment of the present invention will be described.

(Example) As shown in FIG. 4, the packaging material used is a laminated material with a five-layer structure, and is in the form of a roll. To explain the process step by step, the packaging material that comes out of the winding process is side-sealed to create a cylindrical shape. Next, holes for date printing straws are punched, lines are added, and each straw is cut according to the eye marks. And the completed short tube (2) (size 66φX145mm)
Insert it into the mandrel (1) from the opposite direction of the head to be formed, and fix it in a state with 40 increments protruding so that folding, sealing, and forming can be done easily. αa) Step 3 In the next step, The short tube (
2) Apply hydrogen peroxide (5 ml) at room temperature as a disinfectant to the opening.
) An aqueous solution with a concentration of 15- is applied as a mist (7) with pressurized sterile air (6) from an airbrush (4). α
b) Process]. The amount of coating was the highest at the tip, 809/-, and at the mandrel drive part, it was 4.5 g/-.
Immediately after applying the O hydrogen peroxide aqueous solution in step d, in the next step,
The hydrogen peroxide aqueous solution is heated by pressurized sterile air (16) through a heater (8) with sterile 270°C hot air to improve the sterilization effect and completely sterilize the folded portion [Step (C)]. Next, at the same time as the aqueous peroxide solution is decomposed and vaporized, the polyethylene sealant at the end of the short tube (2) is melted, and before the temperature drops, the pressure is applied to the crimp bar (9) with a sealing width of 6 mm, and then cooled. Pressure bonding using a bar (10) [(d) step] Cooling [(e) step]. After that, when moving to the next process, the seal part is crushed using a molded plug (11), the folded part is pushed outward, and the folded part is folded and brought into close contact with the main body in the third step ((f) process. , [(g) Step] Complete sterilization of the folded portion is completed.

The microbial test results of the package sterilized according to the above example are shown. First, the results of testing for the lethal effect of the above example will be shown. The composition of the packaging material used was polyethylene (20p) (15) 7 papers (200q/W?)
(16) / Polyethylene (20p) (17) / Aluminum (9,p) (18) / Polyethylene (
60p) (19) (inner surface), and on the polyethylene surface of the inner sealant, Batill vs coagul
Ans spore suspension was uniformly applied, and the number of bacteria l Q'
After adjusting to 8pOreAd, sterilization was performed. As a disinfectant, apply a 15% hydrogen peroxide solution at room temperature using an airbrush.
The coating amount was 0.31 i' per short tube. Next, blow sterile hot air to the temperature of the outlet to 27°C.
The temperature was adjusted to 0°C and sprayed. After about 1 second, the applied disinfectant decomposed and evaporated, and at the same time the polyethylene sealant melted, and the end of the short tube was crimped and cooled to achieve a complete seal. The container was collected aseptically and the bottom and folded portion were tested for the number of viable bacteria by wiping. The results are shown in Table 1, together with the sterilization method in which after molding, an aqueous hydrogen peroxide solution was sprayed at a concentration of 30% by weight, followed by aseptic hot air treatment at a temperature of 270°C, and a 0.1% by weight hydrogen peroxide solution. The results of the survival function test for the UV sterilization method are also listed in Table 1. Next, the spore suspension of Aspergillus niger was uniformly applied to the packaging material so that the number of bacteria was 10°s pore/, a. Table 2 shows the results of the test for the number of viable bacteria conducted under the same sterilization conditions.

Table 2 (Unit: 5pore/(J)) Furthermore, after sterilization as described above, in the present invention, the main sterilization of the body is performed to ensure that the filled and packaged product, such as corn cream soup with a pH of 7.0, does not spoil. Store at room temperature for a long time (6
However, for products that have been sterilized using other sterilization methods and filled and packaged with similar corn cream soup, even if the main sterilization of the body is performed before filling and packaging,
Rot due to surviving bacteria in the folded portion occurred within one week.

(Effects) The present invention has the above configuration, and by carrying out the sterilization method of the present invention, not only the folded portion can be completely sterilized, but also the molding mandrel can be sterilized at the same time. There is no accumulation of microbial contamination due to sequentially sent packaging materials, and the packaging is hygienic without being contaminated. Therefore, the present invention is very effective in a system for forming, filling and packaging a package having a folded part, and not only can completely sterilize the folded part, but also has a range of measures to prevent secondary contamination. This method of sterilizing packaging containers has the advantage that it can be carried out starting from the sterilization process of the folded parts and is relatively narrow.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the appearance of a rectangular parallelepiped carton (A), which is the object of the sterilization method of the present invention, and FIG. 2 is a perspective view of the appearance of a gusset-type bag (B), which is also the object. Figure 3 is a schematic diagram of a sterilizer used in the sterilization method of the present invention, and Figure 4 is a partially enlarged perspective view showing the configuration of the packaging material used in the example.

Claims (1)

[Claims] (1) In the sterilization method for packages with folded parts, in the process of forming one end of the cylindrical packaging material, a sterilizing solution is applied to one end of the unformed cylindrical material, and then sterilized with heated air. A method for sterilizing a package, which improves effectiveness and simultaneously melts the sealant while removing the chemical solution, forms the sealant after crimping the ends, and sterilizes the folded portion.