Laminated iron technology developed successfully

With the rapid development of China's economy, the metal packaging container industry has developed rapidly. As the main raw material for the packaging industry, the use of tinplate has risen sharply. According to statistics from the China Packaging Technology Association, the market demand for tinplate in China has reached 1.6 million tons in 2003, and it has been increasing at an annual rate of 100,000 tons. The contradiction between supply and demand has become increasingly prominent. For this reason, the sales price of tinplate has also soared, with an increase of 80%! Under such circumstances, the corresponding shift in production costs will inevitably arise: first, price increases downstream, and second, use of high technology to reduce costs. With rising prices, companies are difficult to unify this; only by using high technology, they will not be able to cope with unprecedented challenges and tests. Under the current market situation, it is particularly important to use high technology to transform traditional production processes and enterprises.

Wuxi Partner Daily Chemical Technology Co., Ltd. and Sweden Ruihua Group jointly invested 45 million yuan, and established a joint venture Jiangyin Ruixing Technology Co., Ltd., which specializes in the production of laminated iron for packaging and the manufacture of complete production lines. At present, Nissan has reached a capacity of 100 tons, with a daily output of 150 tons. The company aims to increase research and development efforts, improve quality standards and provide comprehensive services. We are determined to strive for the rapid development of this emerging industry in our country. According to experts’ predictions, the success of the research and development of the patented technology for laminated iron will trigger a new revolution in the metal container industry and bring about tremendous business opportunities.

The characteristics of laminating iron

After changing the traditional iron-printing process into a laminating process, the speed can be increased by a factor of three. At the same time, eight colors can be printed at a speed of up to 200 meters per minute, a maximum width of 1.2 meters, and a double-sided speed of 50 meters per minute. Also compound. For products with a thickness of 0.22mm and a width of 1m, class production can reach 40 tons, and daily production can reach 120 tons. Compared with the traditional iron printing process, the cost can be significantly reduced, energy saving 50%, the temperature requirements of the two processing processes are below 80 °C, the exhaust gas emissions can be reduced by 60%. What is even more outstanding is that since the lamination process adopts coil processing, it can eliminate the bite in the old process and carry out the whole-volume cutting. The utilization rate of the material can be increased by 4.5%, and it can save 400-500 yuan per ton.

Application area

Laminated iron can be widely used in gift packaging, liquor packaging, chemical tanks, food cans, spray cans, toys, stationery and so on.

The successful application of laminated iron can not only save a lot of foreign exchange resources and energy for the country, but also improve the level of environmental protection, increase productivity, reduce production costs, enhance competitiveness, and drive exports of agricultural and sideline products to achieve the revitalization of the metal packaging industry. It can be described as a country that benefits the nation, benefits the people, and benefits others.

issues that need resolving

1, how to ensure resistance welding, leave blank
This is the key to the technology of laminating iron. The traditional printing iron is slotted on the coating roller, but the phenomenon of feeding occurs from time to time. The lamination is cut before blanking and the blanking phenomenon will not occur. Therefore, it is even more so. Accurate and reliable.

2, after the film coating on the impact of plastic injection
There are two problems that need to be explained clearly. First, according to different needs, the complex film and the paint and the varnish applied to the can are of the same nature. Therefore, the compatibility between the current patch glue and the seal glue is the same. There is no problem at all. The second is that the thickness of the film on the inner side is thicker than that of the coating 214 and it is soft and uniform. It can dispense with the sealant injection and achieve the same sealing effect. This is an important reason for the overseas promotion of laminated iron.

3, vacancy in the transport and storage of the blank part of the problem of rust
Even the tinned part of the tinplate during the rainy season is a big problem. Not to mention the use of tinplate substrates, but also the focus of research. Due to the use of conductive paints prior to compounding, the effect is significant and never lower than the anti-rust properties of tinplate.

4, to meet the FDA food hygiene requirements and high temperature, cooking requirements
At present, the membranes and adhesives used are all materials for food-grade flexible packaging bags. All indicators meet the requirements for food hygiene and high temperature and cooking resistance, and they do not contain solvents.

5, to achieve the printing of iron transparent gold, silver effect and matt effect
Facts have proved that the use of aluminum film, matt film and laser film, the effect is even better than a tin plate. Currently accepted specifications are:
0.35*730*C T2.5-T3 positive magnetic white, reverse transparent yellow;
0.28*712*C T2.5-T3 positive magnetic white, reverse transparent yellow;
0.28*712*C T2.5-T3 frontal aluminized and reversed ferrochrome
0.28*712*C T2.5-T3 front chromium iron color, reverse transparent yellow;
0.23*800*C T2.5-T3 positive magnetic white, reverse transparent yellow;
0.21*700*C T2.5-T3 positive magnetic white, reverse transparent yellow;
0.20*660*C T2.5-T3 front chromium iron color, reverse transparent yellow.

Source: China Packaging Industry