JPH0671A - Rust-proofing method for exposed iron part of crown cap of drink container - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a rust preventive treatment method for safely exposing an exposed iron surface of a crown of a beverage container from the viewpoint of food hygiene and also having an extremely excellent rust preventive effect. [Structure] A method for performing rust prevention treatment on the exposed iron surface of a beverage container crown using an aqueous solution of a food additive.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention caps a beverage container with an exposed iron surface of the end face of the crown, which is generated when stamping and molding a tin or a tin-free steel sheet on which a beverage container is painted and printed. The present invention relates to a rust preventive method for treating an exposed iron surface of a beverage container crown, such as an exposed iron surface of a cap stopper flaw of a crown, which is caused by a tightening jig, with a substance which is approved to be added to food.

[0002]

2. Description of the Related Art Conventionally, as a method for preventing rust on an exposed iron surface of a crown, a method of treating the crown with a phosphate and a vaporizable rust preventive (JP-A-48-626), zinc powder or aluminum powder is used. A method of treating a crown with a resin coating containing the same (JP-A-55)
-55947, JP-A-58-134867), a method of treating a crown with an oxygen scavenger (JP-A-60-131981), and further treating the crown with a wax or an oily agent such as petrolatum or paraffin. A method (JP-A-51-90682) is disclosed.

[0003]

Conventionally, since the flat surface of the crown of a beverage container for beer, soft drinks, etc. is printed, no rust is generated.
Since the crown is stamped and formed from a free steel sheet or tin sheet, the end surface of the crown is exposed. And when the crown is plugged into the beverage container, due to the friction between the tightening metal and the crown surface coating film,
Partial film peeling may occur. As described above, the exposed iron surface at the contact portion between the crown end surface and the fastening member is likely to be rusted under high temperature and high humidity in the rainy season or in climatic conditions causing dew condensation in winter. In the summer, drink bottles such as beer, cider, juice and liquor may be placed directly in the cooler box to cool, so in such a case water directly attaches to the exposed iron surface of the crown and promotes rusting. As a result, the rusted crown significantly reduces the image of beverage products and affects the product value. However, when the above-mentioned portion of the crown of the beverage container is subjected to rust-prevention treatment, if the conventional rust-preventive agent is used for the rust-prevention treatment, there is a problem in safety for human body from the viewpoint of food hygiene. In particular, the rust preventive agent applied to the exposed iron on the end surface after molding of the crown may cause powder of the rust preventive agent generated by rubbing between the crowns to adhere to the packing surface of the crown, which may be mixed in the beverage. In addition, an infant may accidentally put the extracted crown in his mouth and the rust preventive may be dissolved by saliva and swallowed. Therefore, the rust preventive agent used on the exposed iron surface of the beverage container crown is preferably a substance which is approved to be added to foods. However, there is currently no such rust prevention.

[0004]

Means for Solving the Problems As a result of intensive research aimed at solving the above problems, the present inventors have found that a component currently used as a food additive has rust-preventive properties, and this is used as an aqueous solution to perform crown punch molding. When applied to the exposed iron surface that occurs when the crown is plugged or when the crown is plugged, surprisingly excellent rust prevention,
Moreover, they have found that the safety for the human body has been confirmed, and completed the present invention. That is, the present invention, the exposed iron surface of the beverage container crown one or more of the ingredients of food preservatives, antioxidants, sizing agents, seasonings, acidulants, sweeteners, emulsifiers, coating agents, strengthening agents. It is a method of preventing corrosion on an exposed iron surface of a beverage container crown, which is characterized by treating with an aqueous solution containing the same.

The object to be treated by the rust preventive method of the present invention is a tin-free steel sheet, which is generally used for beverage containers such as beer and soft drinks, having a printed flat portion, and a crown stamped and formed from a tin sheet. is there. Therefore, the iron surface is exposed on the end surface of the crown by punching. Further, when the crown is capped in a beverage container, the coating film is peeled off due to friction between the clamp and the coating film on the surface of the crown, and the iron surface is exposed. Then, the rust-preventive composition for treating this surface is benzoic acid, sodium benzoate, sorbic acid, potassium sorbate, sodium dehydroacetate, calcium propionate, compounds used in preservatives of food such as sodium propionate. , L
-Ascorbic acid, sodium L-ascorbate, potassium disodium ethylenediaminetetraacetate, disodium ethylenediaminetetraacetate, erythorbic acid, compounds used as antioxidants for food such as L-cysteine hydrochloric acid, sodium L-aspartate, DL-alanine, L-arginine, L-glutamate, 5'-inosinate disodium, 5'-uridylate disodium, potassium chloride, 5'-sodium guanylate, monopotassium citrate, tripotassium citrate, citric acid Trisodium acid, glycine, L-glutamic acid, potassium L-glutamate, sodium L-glutamate, magnesium L-glutamate, monosodium succinate, disodium succinate, sodium 5'-cytidylate, DL-sodium tartrate, L-tartaric acid Sodium, L- Anine, sodium lactate, monosodium fumarate, 5'-liponucleotide calcium calcium, 5'-liponucleotide disodium, DL-sodium malate and other compounds used in food seasonings, adipic acid, citric acid and Compounds used as acidulants for foods such as gluconodeltalactone, compounds used as sweeteners for foods such as D-sorbitol, glycerin fatty acid esters,
Compounds used as food emulsifiers such as sweet fatty acid esters and propylene glycol fatty acid esters, those used as film-forming agents for foods such as oxyethylene higher fatty acid alcohol, sodium oleate, vinyl acetate resin, nicotinic acid, nicotine Compounds used as food enhancers such as acid amides, sodium alginate, sodium caseinate, calcium carboxymethylcellulose, sodium carboxymethylcellulose, sodium starch glycolate, sodium starch ester, methylcellulose, sodium polyacrylate, etc. It is a water-soluble composition containing one or two or more compounds used in the composition. And these components with respect to the total composition are preferably in the range of approximately 1 to 10%, more preferably in the range of 2 to 5%. In addition,
The pH of this water-soluble composition is preferably adjusted to a neutral to alkaline range.

The rust preventive composition used in the present invention is generally prepared as follows. First, a certain amount of the compound used for the paste of food is added to a predetermined amount of heated water, and dissolved while stirring well. Similarly, it is possible to add a compound acting as a rust-preventive water-soluble composition, such as a food preservative, an antioxidant and a seasoning, and finally add a film-forming agent and, if necessary, an appropriate amount of an emulsifier.

[0007] A method of applying a rust preventive composition consisting of substances approved to be added to foods prepared as described above to the exposed iron surface of a beverage crown to prevent rust is The composition of the invention is impregnated into fibers and applied to the exposed iron surface in the appropriate step of crown application, or the exposed iron surface of the crown is dipped in the solution of the rust-preventive water-soluble composition and applied. Appropriate processing means such as spraying a liquid of a rust preventive water-soluble composition on the exposed surface can be adopted.

[0008]

Example 1 A crown formed by stamping and molding a paint-printed tein steel sheet was continuously transferred by a belt conveyor, and during this transfer process, a solution of a rust preventive composition shown in Table 1 below ( A cloth belt impregnated with an anticorrosive treatment liquid is set, and this belt is applied to the exposed iron surface of the formed crown end surface.

[0009]

[Example 2] In order to evaluate the corrosion resistance of the exposed iron on the end face of the crown when the beverage bottle was stoppered and the exposed iron surface caused by the peeling of the printed coating film by the stoppering machine, the beverage bottle was capped. Without using it, the exposed iron surface of the crown molded by a stoppering machine using a wooden stick having the same thickness as the diameter of the bottle for capping the crown was immersed in a rust preventive treatment liquid filled to a depth of 5 mm in a petri dish.

Next, Table 1 shows the composition of the anticorrosive treatment liquid used in Examples 1 and 2. Then, the crown subjected to the anticorrosion treatment in Example 1 and Example 2 was subjected to a constant temperature and humidity tester (50 ° C).
/ RH95%) was used to observe the occurrence of rust over time and evaluate the rust prevention effect. The results are shown in Table 2. Margin below

[0011]

[Table 1] Composition of rust preventive treatment liquid of Example 1 and Example 2 The content of the components in this table is% by weight. Margin below

[0012]

Table 2 Example 1 (A, B, C) and Example 2
Treated with (E, F, G) As is clear from the above results, the crown treated by the rust preventive treatment method of the present invention has an effect of remarkably suppressing the generation of rust.

[0013]

INDUSTRIAL APPLICABILITY The rust preventive treatment method for the crown of the present invention uses a rust preventive agent which is a component safe for humans from the viewpoint of food hygiene, and has an extremely excellent rust preventive effect. Since it is a liquid, it is an excellent method for process control.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takehisa Shimada 2-13-1, Omorikita, Ota-ku, Tokyo Asahi Biru Co., Ltd. Product Technology Research Laboratory (72) Keiichi Tanigawa 1-Umeda, Kita-ku, Osaka-shi, Osaka 2-2-1400 Daido Chemical Industry Co., Ltd. (72) Inventor Hiroyuki Takahashi 1-2-2-1400 Umeda, Kita-ku, Osaka City, Osaka Prefecture Daido Chemical Industry Co., Ltd.

Claims (10)

[Claims] 1. The exposed iron surface of a beverage container crown is provided with one or more components of food preservatives, antioxidants, sizing agents, seasonings, acidulants, sweeteners, emulsifiers, coating agents, and strengthening agents. A method for preventing rust on an exposed iron surface of a beverage container crown, which is characterized by treating with an aqueous solution containing. 2. The rust preventive method according to claim 1, wherein the components of the food preservative are benzoic acid, sodium benzoate, sorbic acid, potassium sorbate, sodium dehydroacetate, calcium propionate and sodium propionate. 3. The antioxidant component of food is L-ascorbic acid, sodium L-ascorbate, potassium disodium ethylenediaminetetraacetate, disodium ethylenediaminetetraacetate, erythorbic acid and L-cysteine hydrochloric acid. Rust prevention method. 4. The ingredient of the paste of food is sodium alginate, sodium caseinate, calcium carboxymethyl cellulose, sodium carboxymethyl cellulose,
The rust preventive method according to claim 1, which is sodium starch glycolate, sodium starch ester, methyl cellulose and sodium polyacrylate. 5. A component of a food seasoning is sodium L-aspartate, DL-alanine, L-arginine, L-glutamate, 5'-inosinate disodium, 5'-uridylate disodium, potassium chloride, 5'-sodium guanylate, monopotassium citrate, tripotassium citrate, trisodium citrate, glycine, L-glutamic acid, potassium L-glutamate, sodium L-glutamate, magnesium L-glutamate, monosodium succinate, succinic acid Disodium, 5'-sodium cytidilate, DL-sodium tartrate, L-sodium tartrate, L-theanine, sodium lactate, monosodium fumarate, 5'-liponucleotide calcium, 5'-liponucleotide disodium and DL-apple The rust preventive method according to claim 1, which is sodium acid salt. 6. The rust preventive method according to claim 1, wherein the components of the acidulant of the food are adipic acid, citric acid and gluconodeltalactone. 7. The rust preventive method according to claim 1, wherein the sweetener component of the food is D-sorbitol. 8. The method according to claim 1, wherein the components of the emulsifier of the food are glycerin fatty acid ester, sauté fatty acid ester and propylene glycol fatty acid ester. 9. The rust preventive method according to claim 1, wherein the components of the film-forming agent for food are oxyethylene higher aliphatic alcohol, sodium oleate and vinyl acetate resin. 10. The rust preventive method according to claim 1, wherein the components of the food strengthening agent are nicotinic acid and nicotinic acid amide.