JPH01199879A - Container for packaging easily oxidizable substance - Google Patents

Abstract

PURPOSE:To permit the retention of the quality of articles packaged in a con tainer for many hours, by providing the container with a linear material having oxygen-removing capacity on the inner surface of the container. CONSTITUTION:The method of using a packaging container is by packing the container with an easily oxidizable substance and sealing the same with a lid formed with oxygen absorbent mixed in its linear material, thereby removing the oxygen present in a free space with a deoxidation agent. As oxygen absor bent, there are used chemicals capable of absorbing oxygen or producing a reducing environment such as various oxygen absorbents, age resisters and antioxidants on an adequate basis and, as oxygen-barrier container, bottles, cans and plastic containers are used. As the material for use in the forming of the linear, polyvinylidene chloride and polyester are used either separately or together, preferably with the oxygen absorbent content of the liner material of 5-20wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a packaging container that is filled and sealed. More specifically, the present invention relates to a packaging container that is filled and sealed. The present invention relates to a packaging container that can maintain the quality and preserve the product for a long period of time by removing oxygen in the free space of the product and/or reducing the concentration of dissolved oxygen in the product.

Packaged articles include not only food and drink, but also cosmetics, pharmaceuticals, nutritional foods, industrial chemicals, etc. Therefore, the present invention includes:
It plays an important role in a wide range of genres such as packaging, preservation, distribution, and sales in each of these technical fields.

[Conventional technology]

Items that are easily oxidized by oxygen, such as juices or cosmetics containing oils and fats, are usually filled into oxygen-barrier containers such as bottles or cans, and are treated with methods such as hot filling or free space gas replacement to ensure that there is no residual oxygen in the container. It was sealed and sealed.

However, the free space replacement equipment itself tends to be large in size, and in order to improve the replacement efficiency, inert gas, etc. is blown with considerable force, which causes the filled contents to scatter outside the container. In terms of hygiene and production efficiency, it is extremely
Problems remained.

In addition, the replacement efficiency was low, and inert gas was often wasted.

[Problem to be solved by the invention]

For products that are easily oxidized, the presence of oxygen may cause deterioration or deterioration of the quality of the active ingredients, deterioration or change in flavor or color, reducing the product value, and in severe cases, turning into harmful products or poisonous products. generate components.

This tendency is particularly noticeable in aseptically packaged beverages, which are currently rapidly increasing in number, and cosmetics, which are sensitive to oxidation. However, it is no exaggeration to say that it is impossible to efficiently and industrially deoxidize a large amount of oxygen without using large equipment.

[Means to solve the problem]

The present invention has been made to solve the above-mentioned drawbacks all at once. That is, the present invention reduces or completely removes the oxygen concentration in the free space of a packaged article housed in a container by surface-oriented means, or also removes dissolved oxygen in the packaged article, and also removes dissolved oxygen from the packaged article that originally contains oxygen. The object of the present invention is to provide a packaging container that can maintain its condition for a long period of time, unlike other packaging items.

Furthermore, the present invention provides a new packaging container that can store all easily oxidizable items, regardless of the type of the item to be packaged, for a long period of time without causing oxidation, even though the free space of the container is not replaced with gas. The purpose is to provide

To achieve the above objectives, we have conducted a wide range of studies on packaging materials, packaging methods, antioxidants, food chemistry, cosmetic chemistry, medicinal chemistry, and other technical fields. Attempts were made to treat this problem, but none of these treatments were fully successful on an industrial scale.

Therefore, we were forced to change our way of thinking, and conducted intensive research.
When we placed an oxygen absorber in the liner material of the cap of a container, we unexpectedly found that there was no change in quality even after more than a month had passed, even though the free space was not replaced with gas. Furthermore, we also obtained the useful knowledge that this gas can be industrially processed in large quantities.

Based on these useful new findings, we will continue to work day and night.
As a result of repeated research and consideration, the present invention was completed.

The present invention is a packaging container for easily oxidizable materials, in which a liner material having an oxygen removing ability is attached to the inner surface of the container member. Examples of the container member include a lid material for a bottle, a laminate packaging member that constitutes a container body, and the like.

To give an example of how to use the packaging container of the present invention, an easily oxidizable article is first filled into the container. The container filled in this manner is sealed with a lid material prepared by kneading an oxygen absorber into a liner material. Oxygen present in the free space is then removed using an oxygen scavenger in the liner material.

Since a conventional filling and packaging machine is sufficient for filling the packaging container, the packaging equipment currently in use can be used as is, which is also one of the excellent features of the present invention.

As the oxygen absorber, various commercially available oxygen absorbers, anti-aging agents, antioxidants, and other agents capable of absorbing oxygen or creating a reducing atmosphere are appropriately used.

In this case, the packaging container must have oxygen-blocking properties, and both the packaging container and the liner material must have the ability to block oxygen. As this oxygen-barrier container, for example, a bottle, a can, a plastic molded container, a bag-like container, etc. are used.

The materials constituting this plastic molded container include polyvinylidene chloride, saponified ethylene vinyl acetate copolymer resin, polyester, polyamide, polypropylene, and others, either singly or in combination. , plastic and aluminum foil,
Laminations between rubber and other dissimilar materials can also be used. The material used to construct the bag-like container may be a plastic composite material laminated with aluminum foil, a plastic composite material laminated with aluminum vapor-deposited film, or the like.

In addition, the materials that make up the liner material include polyvinylidene chloride, ethylene vinyl acetate copolymer saponified resin,
Polyester, polyamide, polypropylene and others may be used singly or in combination.

The content of the oxygen absorber in this liner material varies depending on the oxygen absorber's deoxidizing ability and its type, but is generally preferably 5 to 20% by weight. What should be considered here is that the addition of an oxygen absorber to the liner material does not reduce the conventional sealing ability.

According to the present invention, various products can be advantageously preserved, but it is particularly advantageous for packaging products that are easily oxidized, such as those containing vitamin C, vitamin E, fats, fatty acids, etc. This is advantageous for packaging items that are susceptible to deterioration or change in temperature.

Examples of such easily oxidizable products include the following foods, beverages, cosmetics, nutritional foods, pharmaceuticals, industrial chemicals, industrial materials, etc. Foods and drinks (straight fruit juices such as kabosu and sudachi; oranges, etc.) , grape etc. f!
Am Fruit juice; Tea, coffee, cocoa; Concentrates such as wheat tea and oolong tea; Edible oil; Butter, cheese, cream, milk; Mayonnaise, paste, dressing; Wine,
Alcoholic beverages such as sake; soy sauce, sauce, mentsuyu;
Nutritional foods (liver oil, germ oil, rice sugar oil, etc.); Vitamin C
, various cosmetics and pharmaceuticals containing vitamin E, fat, etc.

Examples of the present invention will be described below.

[Example] (Example I) A container 1 made of a 1.52-sized PET (polyethylene terephthalate) bottle was filled with 410% orange juice. A container sealed with a conventionally used aluminum cap 2 (EVA is used as the liner material 3) (for comparison), and a liner material EVA according to the present invention, which is a deoxidizing material w.
A container 1 (see FIG. 1) sealed with a cap 2 in which a liner material 3 was prepared by adding 15% of t and uniformly mixing it in a mixer was prepared. This was then stored at 20°C.

Vitamin C is measured by the indophenol method, and the degree of browning is determined by adding the same amount of ethanol as the fruit juice and filtering.
Absorbance at 0 nm was measured.

Figure 2 shows the changes in vitamin C during storage, and Figure 1 shows the oxygen concentration and degree of browning (ODai) in the free space after 4 weeks.
It is shown in Table and Table 2.

Table 1 Browning degree (ODa 3°) Table 2 Oxygen concentration in 7 Lie The degree of browning was also better than that of the control.

(Example 2) As shown in Figure 3, 750nf! Container 1 consisting of a glass bottle filled with wine and closed with a crown 6 (control product), and one closed with a liner material 2 of the crown 6 containing 10% oxygen scavenger. Table 3 shows the oxygen concentration in the free space after storage at C for 2 weeks.

Table 3: Oxygen Concentration As shown in Table 3, the container of the present invention was able to remove oxygen from the free space and prevent the quality of wine from deteriorating.

(Example 3) As shown in Fig. 4, contents 8 were placed in a laminated packaging bag 7 laminated with a liner material 3 containing an oxygen absorber in the inner layer and stored together with a similar packaging bag that did not contain an oxygen absorber. As a result, similar to Examples 1 and 2, the packaging bag of the present invention exhibited an excellent oxygen scavenging effect.

〔Effect of the invention〕

In the packaging container of the present invention, oxygen in the free space remaining after filling the container is absorbed and removed by the oxygen scavenger in the liner material without replacing it with an inert gas, resulting in oxygen in the free space. In addition, the concentration of oxygen dissolved or mixed in the article can be reduced.

As a result, changes or deterioration in the quality of packaged goods are prevented, and in the case of food and beverages, deterioration in flavor and color is particularly prevented.
In the case of pharmaceuticals, cosmetics, and nutritious health foods, the packaging container is extremely useful in industry, as it prevents deterioration of active ingredients and allows these products that are susceptible to deterioration to be stored at room temperature for an extremely long period of time.

[Brief explanation of the drawing]

The container in Figure 1 shows an example in which a bottle containing 10% fruit juice is sealed with a cap fitted with liner material, and Figure 2 shows the vitamin C in the fruit juice in the example in Figure 1.
The container in Fig. 3 shows an example in which a bottle containing wine is sealed with a crown fitted with a liner material, and the container in Fig. 4 shows an example in which a bottle containing wine is sealed with a crown fitted with a liner material. An example is shown in which easily oxidizable articles are placed in a laminated packaging bag. In the drawing, 1 is a packaging container, 2 is an aluminum cap, and 3 is a packaging container.
4 indicates a liner material, 4 indicates fruit juice, 5 indicates a free space, 6 indicates a crown, 7 indicates a packaging bag, and 8 indicates an easily oxidizable article.

Claims (1)

[Scope of Claims] 1. A packaging container for easily oxidizable materials, which includes a liner material having an oxygen removing ability attached to the inner surface of the container member. 2. The packaging container according to claim 1, wherein the container member is a lid material. 3. The packaging container according to claim 1, wherein the container member is a laminate packaging material constituting the container body.