JPH0126632Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a packaging bag for a container containing oxygen gas.

[Problems to be solved by conventional techniques and ideas]

BACKGROUND OF THE INVENTION Conventionally, oxygen gas containers in which oxygen gas is sealed in a relatively small container have been commercially available, and are used, for example, for repairing electrical appliances and for medical purposes. The above-mentioned sealed containers are usually sold with a seal on the container or cap or wrapped in heat-shrinkable film, but oxygen gas often leaks from the container during storage, etc. There were problems such as the amount decreasing.

[Means for Solving the Problems] The present invention aims to provide a packaging bag for oxygen gas-filled containers that quickly detects leakage of oxygen gas from oxygen gas-filled containers and maintains constant quality of the oxygen gas-filled containers. purpose.

That is, the present invention is an oxygen scavenger that is formed from a sheet having an oxygen barrier layer and is used to absorb oxygen gas in the air that is taken into the bag together with the oxygen gas container when the oxygen gas container is housed and packaged. The present invention provides a packaging bag for an oxygen gas-filled container, which is characterized by having inside thereof an oxygen detection agent for detecting leakage of oxygen gas from an oxygen gas-filled container housed in the bag.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 and 2 show a packaging bag 1 for an oxygen gas-filled container, which is an embodiment of the present invention. The bag main body 2 of this packaging bag 1 is formed into a bag-like sheet having an oxygen barrier layer 3, and the sheet usually has a heat seal layer 4 on the inner surface of the oxygen barrier layer 3 and an epithelial layer 5 on the outer surface. A three-layer structure with laminated layers is used. As the oxygen barrier layer 3,
For example, a film made of vinylidene chloride, saponified ethylene-vinyl acetate copolymer, or the like is used, and as the heat seal layer 4, a film made of polyethylene, polypropylene, ionomer, or the like is used.
Further, as the epithelial layer 5, a stretched nylon film, a stretched polypropylene film, a stretched polyethylene terephthalate film, or the like having high strength is used to hold the relatively heavy enclosure 12.

Inside the bag body 2, there is an oxygen absorber 6 for absorbing oxygen gas taken into the bag 1 when the oxygen gas enclosure 12 is stored, and an oxygen absorber 6 for absorbing oxygen gas from the oxygen gas enclosure 12 housed in the bag. Oxygen detection unit 7 for detecting oxygen gas when it leaks
are arranged to form the packaging bag 1. As the oxygen scavenger 6, for example, one containing pure iron as a main component mixed with water and a reaction aid can be used,
Examples of the form include powder packaged in a bag, tableted, or ink and printed on a base material. The oxygen absorber 6 needs to be in an amount sufficient to absorb the oxygen present in the bag body 2 that is taken in when the oxygen gas filled container 12 is packaged, but if the oxygen absorber 6 is present in excess, the oxygen gas will not be filled. If oxygen gas leaks from the container, this oxygen will be absorbed by the oxygen absorber 6.
The leakage of oxygen gas from 2 will no longer be detected by the oxygen detection unit 7. For this reason, oxygen absorber 6
The amount of oxygen to be used is preferably such that it can absorb about 1.2 to 2 times the amount of oxygen in the interior space of the bag body 2. Oxygen absorber 6
You can simply put it inside the bag body 2, but
It may also be used by being attached to the heat seal layer 4.

For example, as shown in FIG. 3, the oxygen detection section 7 has a structure in which a sealing layer 9 is provided on one side of a base material 8, an oxygen detection agent 10 is applied on the upper surface of the sealing layer 9, and an adhesive 11 is provided on the back surface of the base material 8. The bag body 2 can be used.
The adhesive 11 can be used to adhere to the inside of the container, that is, the 4 surfaces of the heat seal layer or the surface of the oxygen gas enclosure 12. Alternatively, the oxygen detecting section 7 made of only the oxygen detecting agent 10 may be simply included. As the oxygen detecting agent 10, a known oxygen indicator that utilizes the difference in color between oxidized and reduced redox dyes can be used. This oxygen indicator is, for example, a thiazine dye,
Indigoid dyes, thioindigoid dyes, sulfur dyes, etc. are produced in the presence of oxygen and in deoxygenated conditions (oxygen concentration is 0.1%) in the coexistence of reducing sugars and alkaline substances.
In the following), the properties of significantly different coloring are utilized, and the above-mentioned coexisting system is dissolved or dispersed in a resin solution to form an ink. Another example of the oxygen detecting agent 10 is an oxygen indicator that is made of a substance that is both an oxygen adsorbing and desorbing substance and a pigment, and that utilizes the difference between the color of the oxygen adsorbing state and the color of the oxygen desorbing state. Specific examples of this indicator include, for example, an ink made of bissalicylaldehyde ethylenediimine cobalt complex or viologen together with a binder and an auxiliary agent.

In the packaging bag 1 of the present invention, as shown in FIG. 4, the oxygen detection part 7 is composed only of the oxygen detection agent 10, and this is arranged between the oxygen barrier layer 3 and the heat seal layer 4. You can also do it.

Hereinafter, the present invention will be explained in more detail with reference to specific examples.

Example 1 A laminated film was prepared by laminating a 30μ polyethylene film on the vinylidene chloride side of a 15μ stretched nylon film coated with vinylidene chloride, and a bag body as shown in FIG. 1 was made using the laminated film. Two of these bag bodies were prepared, and Ageless Eye (manufactured by Mitsubishi Gas Chemical Co., Ltd.) as an oxygen detection agent and Agelace Z-50 as an oxygen scavenger were placed in each bag along with an oxygen gas sealed container and heat-sealed. .

Ageless Eye was blue in both packaging bags when it was sealed, but when it was left at 25°C for 48 hours, one turned pink, indicating that there was no leakage of oxygen gas.

Example 2 Methylene blue, reducing sugar,
An oxygen detection section as shown in FIG. 3 was prepared using an ink made from an alkaline substance and a complementary coloring agent using an ink auxiliary agent, and then this was attached to an oxygen gas enclosure. Two bag bodies similar to the bag body prepared in Example 1 were prepared, and the above-mentioned oxygen gas-filled container and Ageless F-100 as an oxygen scavenger were placed therein and heat-sealed. At the time of sealing, both oxygen detection parts were blue, but after 24 hours, one turned pink, indicating that there was no oxygen leakage.

Example 3 An oxygen detecting agent was prepared by forming an ink with salicylaldehyde ethylenediimine cobalt complex (Sarcomine) together with a vehicle.The above oxygen detecting agent was used on the vinylidene chloride side of a stretched nylon film coated with vinylidene chloride and having a thickness of 15μ. After printing the oxygen detection part, a polyethylene film was laminated. Two packaging bags were made using this laminated sheet, and an oxygen gas-filled container and Ageless Z-
50 and then heat sealing was performed.

After encapsulation, the oxygen detection part was dark brown,
After 3 days at 25°C, one was pale yellow and no leakage was observed, but the other remained dark brown, indicating leakage.

[Effect]

When using the packaging bag 1 for oxygen gas-filled containers of the present invention, first place the oxygen gas-filled container 12 into the bag body 2, and position the oxygen absorber 6 and oxygen detection unit 7 at predetermined positions. to seal the packaging bag 1. In this case, the oxygen taken into the inside of the bag body 2 is absorbed by the oxygen absorber 6, and the inside of the bag body 2 becomes anoxic. If oxygen gas is leaking from the enclosure 12, the oxygen detection agent 10 of the oxygen detection unit 7
reacts with oxygen and changes color, allowing oxygen leakage to be confirmed from the outside of the bag.

〔Effect of the invention〕

As explained above, in the packaging bag for oxygen gas-filled containers of the present invention, the bag body is composed of a sheet having an oxygen barrier layer, and the oxygen taken into the bag when the oxygen gas-filled container is stored and packaged is Since it has an oxygen scavenger to absorb gas and an oxygen detector to detect leakage of oxygen gas from the oxygen gas sealed container contained in the packaging bag, the oxygen gas from the oxygen gas sealed container contained in the packaging bag can be detected. The leakage of the oxygen gas can be easily detected from the outside by the discoloration or color development of the oxygen detecting agent, and the performance of the oxygen gas sealed container can be prevented from deteriorating and the quality can be kept constant.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view of the packaging bag for an oxygen gas-filled container of the present invention, FIG. 2 is a longitudinal sectional view taken along the line - in FIG. 1, and FIG. 3 is an oxygen detection device. FIG. 4 is a longitudinal sectional view showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Packaging bag for oxygen gas sealed container, 6...Oxygen absorber, 7...Oxygen detection unit, 12...Oxygen gas sealed container, 10...Oxygen detection agent.

Claims (1)

[Scope of utility model registration request] formed from a sheet with an oxygen barrier layer;
Oxygen absorber for absorbing oxygen gas in the air taken into the bag together with the oxygen gas container when the oxygen gas container is stored and packaged, and oxygen absorber for absorbing oxygen gas from the oxygen gas container stored in the bag. A packaging bag for an oxygen gas-filled container, characterized by having an oxygen detection agent inside to detect leakage of oxygen gas.