JPS60240614A - Deaeration packaging method - 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 a packaging method that effectively deaerates the air in a packaging bag filled with food or other packaged items, and prevents deformation and tearing of the packaging bag during degassing. It is related to.

[Technical background of the invention and its problems] Conventionally, there has been a method for packaging items such as foods by deaerating the air inside a packaging bag. After filling the packaging bag, the opening of the packaging bag was sealed while degassing with a vacuum pump. In order to sufficiently deaerate the air inside this packaging bag, what is the temperature of the packaged item? It must be lowered sufficiently.

Additionally, if you attempt to completely remove the air inside the bag by increasing the vacuum level, water vapor contained in the packaged items may be drawn into the vacuum pump, reducing the capacity of the vacuum pump. In reality, it was not possible to raise the vacuum to a sufficient degree to degas it.

Furthermore, when the packaged item is a cooked food, it is often packaged in a heated state, in which case water vapor is generated, so when vacuum packaging it, it must be cooled first before packaging. Not.

In the case of the above-mentioned food, it takes time for this cooling to take place. For preservation, it is necessary to heat sterilize the product after that, and heating must be performed to raise the temperature again, which is a waste of time and energy.

[Purpose of the invention]

The present invention allows air inside a packaging bag filled with food or other packaged items to be used as a packaged item. It is an object of the present invention to provide a degassing packaging method which enables effective degassing packaging without cooling and also prevents packaging bags from deforming and breaking during filling and degassing.

[Summary of the invention]

After a three-sided sealed packaging bag is filled with the item to be packaged, it is sealed leaving a degassing part at the opening, and a box-shaped box with a volume that approximately accommodates the packaging bag and a height such that the opening is exposed at the top is formed. A degassing packaging method in which a packaging bag is stored in a support with its mouth facing up, passed through a heating section that heats the bag to a temperature that allows degassing, and then cooled after sealing the degassing section of the mouth. be.

[Detailed description of the invention]

First, as shown in Figure 1, a three-sided sealed packaging bag (1
Items to be packaged such as food in 21! 1 (1) & After filling, attach a degassing part (161i left and mouth seal 08) to the mouth side of the packaging bag (12+) It goes without saying that it is preferably made of a material with excellent gas barrier properties, and in the case where the heating section described below irradiates microwaves, it is made of a microwave-transmissive material that does not contain aluminum foil.

Next, the sealed packaging bag (121) leaving the degassing part (I6) at the opening (14+) is stored in the support (30) of the packaging device (50) shown in FIG. Body (3
0) is a box-shaped box-shaped box with a volume that can approximately accommodate a packaging bag and a height that exposes the opening at the top, and a large number of boxes are fixed at equal intervals on a belt conveyor (321).

The packaging bag (121) housed in the support body (30) is moved to the heating section (52), and heated in the heating section (52) to a temperature sufficient for deaeration of about 100C.At this time, the packaging bag (121) By narrowing the degassing section (161), the temperature can be raised to 105C. By heating in this heating section (5).

At the same time, the gas contained in the packaged items is degassed and sterilized by the degassing section (16), and at the same time, the remaining space inside the packaging bag is filled with water vapor. Note that this filled water vapor is turned into a liquid by cooling, so that the air inside the packaging bag can be sufficiently degassed.

The packaging bag u21 degassed in this way is moved to the next sealing part (
60), and in the sealing section (60), seal the degassing section αliil of the packaging bag (121) before the packaging bag gets cold.

During sealing, heat sealing may be performed with water droplets etc. adhering to the degassing section (161), so it is preferable to use the impulse sealing method, which does not cause sealing defects even in such cases.

Next, there is a degassing packaging method in which the packaging bags (121 pieces are cooled and then swung from the support body 30) by a cooling section (64) provided with a large number of air nozzles + 6616''.

Then, the packaging bag (121) cooled in the cooling section (64) is taken out from the support (30) in the discharge section (70) of the next step, dropped into a water tank (721), and the packaging bag (121) is placed inside the water tank 6. Cool the packaged items in the cage to room temperature.

In the present invention, when microwave irradiation is used as the heating means for the heating section, the packaging bag is made of microwave transparent material as described above, but the packaging bag? Support for storage (30)
Also, 47 fluoroethylene, glass.

A belt conveyor (3) is made of a material that is heat-resistant and microwave-transmissive, such as ceramic or polycarbonate, and further fixes the support.
7) Use ethylene.

In addition, a prevention part (54) t56 must be provided before and after the heating part (52) to prevent microwaves from leaking to the outside.
0J - preferred.

[Effects of the Invention] According to the present invention, even if the packaged items are to be filled in a heated state, they can be degassed without being cooled. Not only can the time required to reach the required temperature be shortened, but also sufficient deaeration can be performed.

In addition, since the packaging bag is heated while it is housed in the support from degassing to cooling, it is possible to prevent the packaging bag from deforming or breaking due to heating. Since the once inflated packaging bag is in a deaerated state, the volume decreases and the packaging bag is easily thrown out from the support.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an explanatory diagram of a packaging bag filled with items to be packaged, and FIG. 2 is an explanatory diagram of a packaging device used in the packaging method of the present invention. . (10)...Item to be packaged (12+...Packaging bag side...
Mouth part (161... Degassing part (18)... Mouth seal m+... Support body (321
...belt conveyor +501...package 1ii (!5
ri...Heating part (60)...Sealing part (6 bleed...
Cooling section (66) Air nozzle patent applicant Toppan Printing Co., Ltd. Representative Kazuo Suzuki (and one other person)

Claims (2)

[Claims] (1) After filling a three-sided sealed packaging bag with the item to be packaged, seal it leaving a degassing part at one opening, and have a volume that approximately accommodates the packaging bag and a height that exposes the opening at the top. A packaging bag inside a box-like support? A degassing packaging method characterized in that the package is stored with the mouth facing upward, passed through a heating section that heats the package to a temperature that allows degassing, and then the package is cooled after sealing the degassing section of the mouth. (2) The degassing packaging method according to claim 1, wherein the heating section is of a microwave irradiation heating type.