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Cast-rolled aluminum foil for aseptic packaging and preparation method of cast-rolled aluminum foil

A packaging, casting and rolling technology, applied in coating, metal material coating process, etc., can solve the problems of insufficient antibacterial performance and low output of double-zero aluminum foil.

Active Publication Date: 2022-07-01
JIANGSU ZHONGJI LAMINATION MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned technical problems, the object of the present invention is to provide a cast-rolled aluminum foil for aseptic packaging and a preparation method thereof: adding cerium ammonium nitrate to deionized water to form a cerium ammonium nitrate solution, and then soaking the cast-rolled aluminum foil in cerium ammonium nitrate solution, then take it out and dry it naturally to get the pretreated cast-rolled aluminum foil, add the antibacterial agent to tetrahydrofuran to prepare the antibacterial solution, then soak the pretreated cast-rolled aluminum foil in the antibacterial solution, then take it out and dry it naturally to get the treated The cast-rolled aluminum foil after treatment is reacted at a constant temperature under the protection of nitrogen, and then washed and dried, which solves the problem that the existing double-zero aluminum foil products are mostly used in fields with low added value such as cigarette foil, due to insufficient antibacterial performance High, resulting in less output of high-quality double-zero aluminum foil that can be used in mid-to-high-end fields such as aseptic packaging

Method used

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  • Cast-rolled aluminum foil for aseptic packaging and preparation method of cast-rolled aluminum foil

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Embodiment 1

[0045] The present embodiment is a preparation method of an antibacterial agent, comprising the following steps:

[0046] A1: Add 1.0g cyanuric acid, 0.43g potassium hydroxide and 100mL deionized water into a three-necked flask equipped with a stirrer and a thermometer, and stir the reaction at a temperature of 75°C and a stirring rate of 300r / min After 2 hours, 20 mmol of 4,6-dibromoindole was added and the reaction was continued for 8 hours. After the reaction, the reaction product was centrifuged, and the precipitate was washed twice with distilled water, and then placed in a vacuum drying box and dried to constant weight to obtain an intermediate body 1;

[0047] A2: Add 10 mmol of p-bromoiodobenzene and 20 mL of tetrahydrofuran to a three-necked flask equipped with a stirrer, a thermometer, a gas pipe and a constant pressure dropping funnel, pass into argon protection, at a temperature of -78°C, and at a stirring rate of 100r Stir under the condition of / min for 30min, t...

Embodiment 2

[0052] The present embodiment is a preparation method of an antibacterial agent, comprising the following steps:

[0053] A1: Add 1.0g cyanuric acid, 0.43g potassium hydroxide and 100mL deionized water into a three-necked flask equipped with a stirrer and a thermometer, and stir the reaction at a temperature of 78°C and a stirring rate of 400r / min After 2.5h, 25mmol of 4,6-dibromoindole was added and the reaction was continued for 9h. After the reaction, the reaction product was centrifuged, and the precipitate was washed three times with distilled water, and then placed in a vacuum drying box and dried to constant weight to obtain Intermediate 1;

[0054] A2: Add 10 mmol of p-bromoiodobenzene and 25 mL of tetrahydrofuran to a three-necked flask equipped with a stirrer, a thermometer, a gas pipe and a constant pressure dropping funnel, and pass through argon protection. The temperature is -78°C, and the stirring rate is 150r. Stir under the condition of / min for 35min, then a...

Embodiment 3

[0059] The present embodiment is a preparation method of an antibacterial agent, comprising the following steps:

[0060] A1: Add 1.0 g of cyanuric acid, 0.43 g of potassium hydroxide and 100 mL of deionized water into a three-necked flask equipped with a stirrer and a thermometer, and stir the reaction at a temperature of 80°C and a stirring rate of 500 r / min. After 3h, 30mmol of 4,6-dibromoindole was added and the reaction was continued for 10h. After the reaction, the reaction product was centrifuged, and the precipitate was washed three times with distilled water, and then placed in a vacuum drying box and dried to constant weight to obtain an intermediate body 1;

[0061] A2: Add 10 mmol of p-bromoiodobenzene and 30 mL of tetrahydrofuran to a three-necked flask equipped with a stirrer, a thermometer, a gas pipe and a constant pressure dropping funnel, and pass into argon protection. The temperature is -78°C, and the stirring rate is 200r Stir under the condition of / min ...

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Abstract

The invention relates to the technical field of sterile packaging, and aims to solve the problem that the yield of high-quality double-zero aluminum foils which can be used in the middle and high-end fields of sterile packaging and the like is relatively low due to the fact that existing double-zero aluminum foil products are mostly used in the fields of cigarette foils and the like with low additional values and are not high enough in antibacterial performance. The preparation method comprises the following steps: preparing an antibacterial solution by adding an antibacterial agent, soaking the cast-rolled aluminum foil in the antibacterial solution for treatment, and polymerizing the antibacterial solution on the cast-rolled aluminum foil by taking ceric ammonium nitrate as a catalyst in the soaking process, so as to obtain the cast-rolled aluminum foil for aseptic packaging. The bonding force between the cast-rolled aluminum foil and the antibacterial agent is increased, and the antibacterial property of the cast-rolled aluminum foil is greatly improved, so that the cast-rolled aluminum foil is suitable for sterile packaging, and the development of the double-zero aluminum foil industry is promoted.

Description

technical field [0001] The invention relates to the technical field of aseptic packaging, in particular to a cast-rolled aluminum foil for aseptic packaging and a preparation method thereof. Background technique [0002] Aluminum foil is a soft metal film made of aluminum by calendering. It has excellent characteristics such as light weight, moisture resistance, high barrier properties and hygiene. It is widely used in heat transmission, electronic power, packaging, construction and many other fields closely related to human life. It has become a necessity for social development. As an important packaging material, double-zero aluminum foil accounts for about 30% of the consumption of aluminum foil. Among them, flexible packaging is a major consumption area of ​​double-zero aluminum foil and has become the mainstream of global food packaging. [0003] As an important part of food packaging, aseptic packaging is widely used in liquid dairy products, vegetable protein drinks a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C23C26/00
CPCC22C21/00C23C26/00
Inventor 崔广健陈少朋丁小丽
Owner JIANGSU ZHONGJI LAMINATION MATERIALS