JPH0339241Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a composite sheet that exhibits various effects such as freshness preservation, deodorization, and sterilization.

[Conventional technology]

Currently, a variety of miscellaneous products are circulating in the market, and depending on the type and quality of the product, it may be necessary to maintain freshness, deodorize, or sterilize the product during packaging, bagging, or boxing. There are many things that must be taken into account.

In particular, if the above-mentioned product is a food product such as a confectionery, use an oxygen absorber to prevent deterioration of fats and oils, or use a desiccant to prevent moisture from forming in the product, or if the product has a strong odor, It is necessary to always take measures to maintain freshness, such as deodorization or sterilization, so that the odor does not leak outside.

[Problem that the invention attempts to solve]

However, in the past, in order to preserve the freshness, deodorize, or sterilize a product, for example, a substance with such functions, such as an oxygen absorber or a desiccant, was placed in a pouch, and the pouch was packaged at the same time as the product. Therefore, especially if a transparent package cage is used, the pouches will stand out and reduce the product value, and conversely, if they are not conspicuous, they will be confused with the product, and in the case of food products, children etc. There have also been accidents where people have eaten the food, which is extremely dangerous.

[Means for solving problems]

In view of the above-mentioned difficulties of the conventional technology, the present invention was made with the purpose of providing a composite sheet that can exhibit various effects such as freshness preservation, deodorization, and sterilization by simply being used as a material for packaging etc. ,
The structure is characterized in that an active layer made of an appropriate type of synthetic resin kneaded with an iron compound stabilized by L-ascorbic acid is laminated on at least one side of a base formed of an appropriate material.

〔Example〕

Next, an example of implementation of the present invention will be explained with reference to the drawings.

1 is a base formed of an appropriate material;
can be used without any restrictions as long as it is a material that can be used in the form of a film or sheet, such as cellophane, polyolefin, polyester-based synthetic resin film, paper, aluminum foil, etc. , Also, there are no restrictions regarding the thickness.

2 is an active layer laminated on one side of the substrate 1;
The active layer 2 is mainly composed of divalent iron ions stabilized by ascorbic acid, and in order to be laminated on the substrate 1, the L-ascorbic acid is added to an appropriate type of synthetic resin such as a polyolefin resin. Divalent iron ions stabilized by acid may be kneaded in an appropriate ratio, extrusion laminated to a desired thickness, and then integrated onto the upper surface of the base 1.

Therefore, the composite sheet S of the present invention having the above configuration
In addition to being used as a sheet to package foodstuffs such as those mentioned above, or cut into appropriate widths and used in automatic filling machines, they can also be used in various heat-sealing applications as shown in Figure 2 a to d. The composite sheet S of the present invention was pasted on the cardboard or carton C by adhering it with an adhesive or by heat-pressing it, or by pasting the composite sheet S on the cardboard or carton C as shown in Figure 3. It is used as a box.

In addition, ascorbic acid, which is the main component of the active layer 2 in the composite sheet of the present invention, and divalent iron ions stabilized by it do not have any adverse effect on the product. As shown in Fig. 5, a protective layer 3 made of an appropriate material such as polyolefin film may be laminated on the top surface of the active layer 2, or if breathability is required depending on the type of product, etc., as shown in Fig. 5. It goes without saying that a perforated composite sheet can be produced by using a device in which a thermally textured roll 4 or a normal textured roll 4 and a rubber roll 5 are placed opposite each other. The specific aspects of the invented composite sheet S will be explained as follows.

Paper / Polyethylene laminate / Active layer / Polyethylene laminate Cellophane / Polyethylene laminate / Active layer Polyolefin film / Polypropylene laminate / Active layer / Polypropylene laminate Polyester film / Polyethylene laminate / Aluminum foil / Polyethylene laminate / Active layer / Polyethylene laminate Paper / Active layer / Paper Divalent iron ions are usually called ferrous ions, and for example, those commercially available as ferrous sulfate may be used, and ascorbic acid, that is, vitamin C, is also available industrially. It has been synthesized and is easily available.

In addition, the amount of ascorbic acid used relative to the divalent ions of iron may be extremely small, and the amount of divalent iron ions stabilized by ascorbic acid used can be reduced by kneading with an appropriate synthetic resin and extrusion laminating as described above. In cases where it is used, a small amount of 1 to 5% produces the excellent effects described below.

[Functions and effects of the invention]

In the composite sheet of the present invention used in this way, divalent iron ions exhibit adsorption ability, and moreover, they are usually easily converted into trivalent ions by oxygen in the air or in an aqueous solution, and the adsorption Since the divalent ions that lose their ability are stabilized with ascorbic acid, they can exhibit excellent effects such as freshness preservation, deodorization, and sterilization over a long period of time.

Therefore, if the composite sheet of the present invention is used for packaging, bagging, or boxing products such as foodstuffs, the quality of the products can be kept constant for a long time, and if used for wallpaper, etc. It can also prevent the growth of mold on building walls, which has become a problem.

The above effects of the composite sheet of the present invention will be specifically explained below.

Example 1 The composite sheet S of the present invention having the above structure was pasted on the inner surface of a cardboard or carton, and grapes,
When two fruits, etc. that did not last long, such as peaches, strawberries, and shiitake mushrooms, were left at room temperature, the same fruit, etc., was placed in a normal cardboard box or carton, and the fruits, etc., that did not last long, such as peaches, strawberries, and shiitake mushrooms, were left at room temperature. 3
However, in the case of cardboard using the composite sheet S of the present invention, it did not rot for at least 5 to 6 days.

Considering the distribution of fruits, etc., the difference between these three days can be said to be extremely large.

Example 2 When a fresh confectionery wrapped using the composite sheet S of the present invention having the above structure and a fresh confectionery wrapped in a normal packaging material were left at room temperature, the fresh confectionery wrapped in the conventional packaging material was Discoloration started on the 3rd day and mold appeared on the 5th day, but when the composite sheet S of the present invention was used, the discoloration started on the 8th day.
Mold appeared on the 11th day.

Example 3 When the composite sheet S of the present invention having the above structure was made perforated and used for packaging natto, and when the normal packaging material was used for packaging natto and left at room temperature, the normal packaging material was The natto used had a strong odor and began to rot on the 4th day, but the natto using the composite sheet S of the present invention began to rot on the 9th day.

[Other Examples]

In the above embodiment, the active layer is laminated only on one side of the substrate, but the structure of the composite sheet of the present invention is not limited to this, and the active layer 2 is laminated on both the upper and lower surfaces of the substrate 1. It goes without saying that the packaging may be laminated, and that the configurations described above are just specific examples and can be configured as appropriate depending on the contents to be packaged.

Since the present invention is as described above, it is extremely practical as a composite sheet used when packaging, bagging, or boxing products such as foodstuffs.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view showing an example of the composite sheet of the present invention, Figures 2 a to d are front views showing an example of bag making of the composite sheet of the present invention, and Figure 3 is the composite sheet of the present invention applied to a cardboard box. FIG. 4 is a perspective view showing an example, FIG. 4 is a sectional view showing another example of the composite sheet of the present invention, and FIG. 5 is a conceptual diagram showing another example of the manufacturing method of the composite sheet of the present invention. 1...Substrate, 2...Active layer, 3...Protective layer.

Claims (1)

[Claims for Utility Model Registration] 1. An active layer made of an appropriate type of synthetic resin kneaded with an iron ion compound stabilized by L-ascorbic acid is laminated on at least one side of a base formed of an appropriate material. composite sheet. 2. The composite sheet according to claim 1 of the utility model registration claim, wherein the active layer has a protective layer made of an appropriate material laminated on its upper or lower surface, if necessary.