JPH05178354A - Packaging bag for vacuum deaeration shaping - Google Patents

Abstract

PURPOSE:To extend the tolerance for vacuum pressure of vacuum deaeration in vacuum deaeration shaping packaging, and make it possible to manufacture a wide range of products from hard shaping bags to flexible shaping bags, and drastically shorten the required time for vacuum deaeration shaping. CONSTITUTION:At the mouth of a packaging bag, a linear seal 13 at an outside location and a linear seal 14 at an inside location are provided in such a manner that they may be intermitted at different locations, and at a part of the linear seal 14 at the inside location, which is confronted with a broken part 15 of the linear seal 13 at the outside location, a protruding seal part 16 is provided. By doing this, the time which is required for vacuum deaeration shaping is drastically shortened, and an effective vacuum deaeration shaping packaging which improves the commodity value depending on the use, shape and type of a commodity is made possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag for vacuum deaeration and shaping which can be easily vacuum deaerated and packaged at high speed.

[0002]

2. Description of the Related Art Conventional vacuum deaeration packaging is disclosed, for example, in Japanese Patent Laid-Open No.
The one disclosed in Japanese Patent No. 1-40291 stores a packaging bag in which a bag mouth is temporarily sealed to the extent that the contents are not exposed in a vacuum chamber, and the inside of the chamber is evacuated.
The packaging bag is shaped and completely sealed in a vacuum. In this vacuum deaeration packaging, it is necessary to seal the bag mouth in two steps, which causes a decrease in processing capacity. In addition, the vacuum deaeration process is expensive and complicated as a whole, such as providing a sealing machine in the vacuum deaeration vacuum chamber.

The applicant of the present invention aims to eliminate the above-mentioned drawbacks of the prior art, and in Japanese Patent Application No. 2-406298,
Disclosed is one in which a packaging bag sealed in a zigzag shape or a labyrinth so that a bag mouth of a packaging bag filled with contents communicates with the inside and outside of the packaging bag is evacuated in a vacuum chamber. This one does not require a special device or process together with the packaging device and the vacuum deaeration device, and is capable of vacuum deaeration shaping without lowering the capacity. In other words, the packaging bag with the zigzag or labyrinth-like seal described above is put into a vacuum deaeration device, and the packaging bag is pressed and vibrated while degassing from the minute gap of the bag mouth in the vacuum chamber of the vacuum deaeration device. Is added for shaping.

Such vacuum deaeration shaping is a hard and clean shaping of the packaging bag product when the vacuum pressure in the vacuum deaeration shaped packaging bag is high, that is, when the vacuum pressure in the vacuum chamber is high. Become. Also, it was performed in a short time. However, recently, there are many customers who desire only shaping, and although shaping has been performed, there has been a demand for an orthopedic packaging bag having a low flexibility and a low vacuum pressure inside the packaging bag. The vacuum deaeration shaping bag according to the one disclosed by the present applicant is degassed from the minute gaps communicating with the inside and outside of the packaging bag, so that it is reliably formed by vacuum degassing at high speed when the vacuum pressure is high. Has a low vacuum pressure, for example -100 mmH
When the pressure is less than g, not only time is required for vacuum degassing, but there are variations in vacuum degassing, and vacuum shaping is sometimes difficult when the vacuum pressure in the vacuum chamber is set lower.

[0005]

SUMMARY OF THE INVENTION The present invention aims to eliminate the above-mentioned drawbacks of the prior art, and expands the allowable range of vacuum pressure in the vacuum chamber to provide a wide range of products from hard shaping bags to soft shaping bags. Not only is this possible, but the time required for vacuum degassing packaging is also greatly reduced.

[0006]

In order to solve the above-mentioned problems, a packaging bag in which a bag mouth of a packaging bag filled with contents is sealed so as to have a minute gap communicating with the inside and outside of the packaging bag,
A linear Japanese seal that is interrupted at different points is provided at the inside position and the outside position of the bag mouth, and the inside seal portion facing the disconnection portion of the outside seal is made non-linear. did.

[0007]

In general, the bag mouth of a packaging bag is generally sealed in a straight line in the width direction of the bag mouth. This is not effective even if a seal with a shape other than a straight line such as a zigzag shape is used, and the processing cost of the seal base (heat bar) is not only high. This is because the pressure applied to the bag mouth of the packaging bag due to the impact at the time may concentrate on the edge portion of the zigzag seal and cause the bag mouth to be broken. From this, a linear seal becomes the mainstream, but the present applicant has clarified that in vacuum degassing, this linear seal is the cause of prolonging the degassing time related to vacuum degassing packaging, Even with the simplest straight seal, it is possible to perform plastic packaging by vacuum degassing in a short time and clean vacuum degassing plastic packaging even at low vacuum pressure.

According to the present invention, two linear seals, which are intermittent at different positions, are provided at the inner position and the outer position of the bag mouth of the packaging bag filled with the contents, and the seal is provided on the outer side. Since the inner seal portion facing the disconnection portion of the seal has a non-linear shape, the air passage formed by the linear seal and the air passage formed in the direction perpendicular to the air passage formed by the linear seal at the outer seal disconnection portion. It is possible not only to reliably ensure that the air in the packaging bag is quickly discharged from the air passage that communicates with the inside and outside of the packaging bag, but also vacuum deaeration shaping is possible even at low vacuum pressure. ..

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A conventional example will be described with reference to FIGS. Also in the packaging bag 10 in which the bag mouth 11 of the packaging bag 10 filled with the contents is sealed so as to have the minute gap 1 communicating with the inside and outside of the packaging bag, the sealing shape is linear for the above reason. When the packaging bag 10 provided with such a seal is put into the vacuum chamber and the vacuum pressure is increased, the packaging bag 10 is greatly expanded due to the pressure difference between the vacuum chamber and the packaging bag 8. At this time, the minute gaps 1 communicating with the inside and outside of the packaging bag 10 also expand. Since the seal shape is linear, the minute gap 1 is also linear, and the minute gap 1 expands into the tunnel-shaped air passage 7 along this linear seal shape. In this way, the minute gap 1 releases the atmospheric pressure in the packaging bag 8 to the outside of the bag, but since the linear seal is provided in the width direction of the packaging bag 10, most of the length of the minute gap 1 is small. The tunnel-shaped air passage 7 in the width direction of the packaging bag 10 with the minute gap 1 becomes the air passage 7 extending in the width direction of the packaging bag 10.

The air in the packaging bag 8 is discharged along the minute gap 1 from the slits 2 and 3 of the linear seal to the outside 4 of the packaging bag and into the vacuum chamber. Air must be expelled approximately perpendicular to the seal. That is, the tunnel-shaped air passage 7 of the minute gap 1 has a shape extending in a direction perpendicular to the direction in which air is emitted, and the tunnel-shaped air passage 7 becomes a pipe and the length of the wall surface of this pipe. The air in the packaging bag 8 is discharged from the cuts (cuts 3) inserted in the direction. That is, as the pressure difference between the inside and the outside of the packaging bag becomes larger, the shape of the tunnel-shaped air passage 7 becomes clearer, so that the cut (cut 3) made in the lengthwise direction of the pipe is the tunnel-shaped air. Road 7 closes it. However, if the vacuum pressure in the vacuum chamber is high, it is possible to forcibly degas the atmosphere in the package even if the gap 3 is closed. However, since the vacuum pressure in the vacuum chamber is high, the packaging bag 10 after vacuum deaeration shaping also has a high vacuum pressure in the packaging bag 8 and is a hard orthopedic packaging bag. Furthermore, it is difficult to make a soft orthopedic bag product with this seal.

Next, an embodiment of the present invention will be described with reference to FIGS. In a packaging bag 9 in which a bag mouth 12 of a packaging bag 9 filled with contents is sealed so as to have a minute gap 1 communicating with the inside and outside of the packaging bag 9, a linear seal at an outer position interrupted at different places in the bag mouth 12 13 and the linear seal 14 at the inner position, and the linear seal 13 at the outer position
The linear seal 14 at the inner position facing the disconnection portion 15 of the
It is shown that the convex seal portion 16 having a non-linear shape is provided.

When the packaging bag 9 thus sealed is placed in a vacuum chamber for vacuum deaeration, the gap 15 of the seal is not closed by the tunnel-shaped air passage 7 having the minute gap 1 unlike the conventional case. .. That is, the convex seal portion 16
As a result, the tunnel-shaped air passage 7 in that portion is distorted, and another tunnel-shaped air passage 17 is provided toward the slit 15 of the linear seal 13 located at the outer side in a direction perpendicular to the tunnel-shaped air passage 7.
The tunnel-shaped air passage 7 is formed into a packaging bag 9
It becomes a tunnel-shaped air passage that communicates with the inside and outside.

Next, the test data that clarify the difference between the packaging bag 9 according to the present invention and the conventional packaging bag 10 will be shown. This represents the difference in deaeration shaping time under the same vacuum pressure.

[0014]

[Table 1] However, even if the vacuum pressure is low, it is possible to take a long time for degassing and shaping, but since it is not practical, it does not measure minutes and is indicated as “difficult”.

From the above, vacuum deaeration shaping packaging becomes possible regardless of the level of vacuum pressure in the vacuum chamber. Moreover, the time required for conventional vacuum deaeration can be greatly reduced.

[0016]

According to the packaging bag for vacuum degassing and shaping described above, it is possible to significantly reduce the time required for vacuum degassing and shaping.
Furthermore, not only vacuum degassing and shaping have become possible even with a low vacuum pressure, but also products that are softened while being vacuum degassing and shaping have been created. From the image of being hard and lumpy, it has a great effect that it can be seen as a soft food that is more familiar to consumers and that it can meet the demands of food manufacturers and the like.

[Brief description of drawings]

FIG. 1 is a view showing a seal portion of a conventional vacuum degassing orthopedic packaging bag.

FIG. 2 is a view showing a seal portion of a vacuum deaeration shaping packaging bag according to the present invention.

FIG. 3 is a cross-sectional view of a seal portion of a conventional vacuum degassing orthopedic packaging bag.

FIG. 4 is a sectional view of a sealing portion of a vacuum deaeration packaging bag according to the present invention.

[Explanation of symbols]

 1 Micro gap 2 Seal gap 3 Seal gap 4 Outside of packaging bag 5 Linear seal 6 Linear seal 7 Tunnel-shaped air passage 8 Inside packaging bag 9 Packaging bag of the present invention 10 Conventional packaging bag 11 Bag mouth 12 bags Mouth 13 Linear seal at outer position 14 Linear seal at inner position 15 Broken line part of linear seal at outer position 16 Convex seal part 17 Another tunnel-like air passage

Claims (1)

[Claims] 1. A packaging bag in which a bag mouth of a packaging bag filled with contents is sealed so as to have a minute gap communicating with the inside and the outside of the packaging bag, and the inside position and the outside position of the bag mouth are different from each other. A packaging bag for vacuum deaeration shaping, which comprises performing two linear seals that are intermittent at a location and making the inner seal portion facing the disconnection portion of the outer seal non-linear.