JPS6034388B2 - Pressure heating sterilization method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure and heat sterilization method, and more particularly to a batch type pressure and heat sterilization method that prevents damage to packages and improves workability.

Conventionally, in a batch type pressurized heat sterilization method, packages filled with contents are arranged on a cooler board as shown in FIG. 1 and stored in a sterilization pot.

This cooler is made of metal materials such as aluminum, duralumin, and stainless steel, which have good thermal conductivity and excellent corrosion resistance. This material has many holes in it to circulate the hot water and cooling water necessary for sterilization. Since the holes are made by pressing or drilling, cutting chips are generated on the machined surface.

For this reason, there have been accidents in which the package is damaged during sterilization due to the heating and pressurizing conditions.

In order to prevent this accident, cloth such as gauze is placed on the cooler board, but this has caused the problem that the fibers of the gauze etc. clog the plumbing pipes. On the other hand, since removing the cutting chips produced by drilling requires a huge amount of processing cost and work, the cooler is used as is without carrying out this process.

The present invention is a pressure and heat sterilization method that solves the above-mentioned problems, and is a pressure and heat sterilization method in which there is no risk of damage to the package during sterilization.

The present invention will be explained in detail below.

The present invention provides a package 1 in which a bag made of a laminated film of a heat-resistant film and a heat-resistant heat sheet film or a laminated film with a metal foil interposed therebetween is filled with contents and sealed.
An intervening sheet made of a heat-resistant plastic material having a mesh shape or an uneven shape with holes as shown in FIG. 2 or 3 is placed on a cooler plate 2 having holes as shown in FIG. 1. Install via 3.

A predetermined amount of the cooler plates 2 on which the packages 1 are installed are stacked on a trolley and stored in a sterilization pot, where they are sterilized by pressure and heat under predetermined conditions.

Here, the intervening sheet 3 used in the present invention is made of a heat-resistant plastic material such as nylon, Teflon, polyester, polypropylene, polyethylene, etc., and has a thickness of 0.03 willow or more, and is provided with desired holes such as a mesh, square, or circular shape. The size of the mesh or holes is such that hot water and cooling water can circulate during sterilization and there is no risk of the package tilting.

Next, an example of pressure heat sterilization conditions will be shown. When polyethylene terephthalate film (12 mm)/aluminum foil (12 mm)/unstretched polypropylene film (70 mm) is used as the packaging material and sterilized under pressure and heat at 12,000 ℃ [1' In the case of a stereotaxic sterilizer, the temperature Two-stage system with water tank and sterilization treatment tank, temperature of hot water tank is 1200.
0 and sterilized at 113oo for 40 minutes, then primary cooling for 10 minutes, followed by secondary cooling for another 10 minutes.

At this time, the pressure of the sterilization treatment tank was maintained at 1.1k9/14%. The circulating temperature of hot water during sterilization treatment is 116
The minimum pressure regulation in °C is 1.3k9/c and the maximum is 1.6kg.
/ was.

{2) In the case of a rotary sterilization pot, the temperature of the hot water tank is set to 1200°C using a two-stage system consisting of a hot water tank and a sterilization treatment tank.
0, primary heating 1130, 40 minutes, secondary heating 115
00, 40 minutes secondary cooling for 10 minutes and further secondary cooling for 10 minutes.

The circulation temperature during sterilization was 112 to 11,600, and the minimum pressure adjustment was 1.2k9/cm and the maximum was 1.5k9/c.

Since the present invention performs pressure heat sterilization under such conditions, there is no risk of the package getting stuck in the hole of the cooler plate or coming into contact with the cutting pieces around the hole, and the appearance after sterilization is good. It is.

In addition, it can be used safely without the risk of piping parts coming apart unlike conventionally used textile products such as gauze.

Furthermore, the pressure during sterilization can be adjusted over a wide range.

For example, in the case of a bag with a three-layer structure of polyethylene terephthalate film/aluminum foil/unstretched polypropylene film, the sterilization temperature was 120°C and the pressure adjustment was 1.8k9/c and 4%. Even with 1k9/c vertebrae +4%, there was no damage to the package.

When sterilized using the conventional method, there was a loss of about 1%. When the package was transferred from the cooler to a predetermined location after pressure and heat sterilization, there was little friction between the package and the cooler, making it easy to transfer, and there was no damage or staining caused by the cooler plate during transfer, which was very good.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a conventional cooler, Figs. 2 and 3 are plan views of the intervening sheet used in the present invention, and Fig. 4 is an explanatory diagram showing the state in which the package is placed in the cooler during sterilization. be. 1...Packaging body, 2...Cooler board, 3
...Intervention sheet. Figure 1 Figure 4 Figure 2 Figure 3

Claims (1)

[Claims] 1. An intervening sheet made of a heat-resistant plastic material with a mesh or holes of a size that prevents the package from tipping is placed on a cooler plate made of a metal material with holes, and the contents are A pressure and heat sterilization method in which the filled and sealed package is stored in a sterilization pot with the cooler plates stacked in several stages, and the pressure and heat sterilization is carried out under predetermined conditions. 2. The pressurized heat sterilization method according to claim 1, wherein the thickness of the intervening sheet is 0.03 mm or more.