Selection of raw materials for barrel packaging of "tinplate"

Selection of raw materials for barrel packaging of "tinplate"

At present, China's tinplate barrels (cans) enterprises are facing three major issues and two certifications. The three major lessons are: equipment renewal, raw materials use and environmental protection. The two certifications are ISO14000 and ISO9000. Whoever completes the above-mentioned topics correctly and effectively at an early date will be able to gain a foothold in the market competition and develop.
Nowadays, many companies are entering the pursuit of low prices in the procurement of raw materials, which is worrying. In fact, the real way to reduce costs should be to pay close attention to the development of raw materials and rational use, which is the scientific attitude of ensuring quality and reducing costs. As we all know, the three basic materials used in tin cans are: tinplate, paint ink and sealant, of which tinplate is the most important.
First, tinplate iron
1, with thin generation thickness: the pursuit of China's application history, hot dip tinplate used in the 50s to 60s, tin plating is 100#; in the 70s using electroplated tinplate, tin plating is 50#-100#; tin layer is thinner in the 1990s Then, 10# low tin iron and chrome-plated iron appeared respectively. In addition to the thin layer of tin layer, there are more articles on the substrate. For example, according to the traditional size: 512×712m/m, the thickness of 0.2m/m iron is 1750 sheets per ton, and the thickness of 0.23m/m iron is 1520 sheets per ton, then 0.20m/m iron is used instead of 0.23m/m iron. Barrel (can), calculated at a price of 5,500 yuan / ton, can save about 825 yuan.
We will consider the coiled tinplate to cut itself, so we can save costs from the purchase and utilization.
The tinplate iron (secondary cold-rolled tinplate) with a thickness of 0.16m/m has been used for barreling (cans) and capping, and the prospect of cost reduction is more optimistic. In fact, it has been widely used abroad. China has just started and needs to adapt to printing iron, barrels (cans) and capping equipment as soon as possible.
2, laminating iron: laminating iron is completely tin-free, and directly adhere the plastic film to the surface of the steel sheet through a special melting process, with excellent corrosion resistance and barrel (can) that can not be compared with paint tinplate Performance is a promising new barrel (can) material that can be used to make two-piece cans instead of three-piece cans for food or beverage cans.
Second, paint ink
Paint inks are very important for low tin weight iron and chrome-plated iron. Without good paint ink, it is impossible to have the practical use value of low tin iron or chrome-plated iron. Now, Origen has been producing tomato sauce cans, which are resistant to high acid corrosion. For the coatings, acid-resistant epoxy phenolic coatings must be used. The coating process and film thickness must also be strictly controlled to ensure coating. The compactness of the film, as well as the balance of corrosion resistance and adhesion.
Third, the sealant
At present, there are many sealant production plants in China, and their formulations are similar to the products of Grace Company of the United States, and there will be no big difference in performance. Therefore, in order to ensure the sealing quality of the barrel (can), it is better to focus more on the material and design of the sealing roller, which is more important than the sealing glue.