Design innovation in metal packaging
The development of metal packaging today seems to be two-piece cans, three-piece cans, and cylindrical barrels, mostly cylindrical. With the rapid development of the economy, metal packaging will also develop and innovate.
For packaging users, the main considerations are three factors: cost, environment and consumer demand. The most obvious of these three factors is cost. Efforts to reduce material costs are important for all forms of packaging, and reducing the cost of metals is more important because it accounts for the largest share of total costs. In general, canning technology has almost no limit on the performance of packaging. Whether in the past or the present, canners and steel suppliers are trying to produce higher quality products, processing thinner and thinner metal packaging products, and still Constantly explore better materials to better shape key parts of metal packaging and achieve better packaging performance. So in order to get a better development of metal packaging, only design innovation, because it can get more and more innovative products, it makes people feel refreshed.
At present, the can end of the necked beverage can on the market is relatively small, reducing material and cost. Food cans all over the world have begun to follow suit and have narrowed the edges.
The thinning of materials is one of the ways to reduce costs and has a good development prospect. Since the mid-1970s, Europe has introduced the concept of thinning. When the metal can made of 0.38mm thick material is used, the body weight is 40g. By 1993, the material thickness and the body weight of the metal can were reduced to 0.28mm and 29g respectively. By the mid-1990s, 0.22mm was used. Steel, the weight has been reduced by 21%. At present, it is common to use a 0.16mm-0.2mm thin steel plate to make a can. The weight of the thin steel plate beverage can is reduced by 43%, and this rate of change is very fast in the same period. At present, the thinning of metal packaging materials in China has also begun to develop rapidly. Now in the domestic metal packaging industry, a large number of 200L steel drums with 0.6mm steel plates have appeared. With the continuous updating of manufacturing technology and equipment, not only the thinning of materials, but also the quality and production efficiency are constantly improving.
Today, the representative of the innovative lightweight can body is the award-winning "Flexible Square Can" of the British Karis company, which was developed by the company in the Netherlands. The can body has a reinforced flange and the can body is thinner. Make food cans more flexible when cooked at high temperatures. Flexibility means that the pressure difference of the can wall is smaller, so the can body can be made of a relatively thin (about 0.18 mm) material. This package is a true lightweight tank that weighs 15% lighter than current metals.
In the European packaging competition in recent years, the best-winning metal can is a metal square can made of easy-opening and ordinary 0.17mm steel plate substrate coated with polymer coating on its surface. Packaging steel plate. Manufacturers believe that it is also possible to use a tear-off cover and that there is no need to vent when cooking cans. This square can occupy 20% less space than the round package, and the axial load capacity is 2kN, which is completely within the performance range of the conventional metal can. And the four sides of the can body can print high quality patterns.
In the case of spray cans, a two-piece can of light tinplate series has emerged in Europe. This punching and drawing can has both the thinness of the can body and the opening characteristics of the spray can and is seamless, which significantly reduces the proportion of metal used.
In the packaging industry where market demand is increasing, metal cans are designed in a variety of ways, which requires packaging designers to constantly innovate to meet the different needs of consumers. A few years ago, the British company Carris introduced a new type of decorative steel plate, which consists of chrome-plated steel plate and several layers of polymer coating film on its surface. It has been applied in Europe. This polymer spray material has several layers of composite film that can be metallized and can be printed with a holographic trademark. It has a protective layer that is good for printing. Since the entire process is carried out on a flat surface, this series of decorative steel sheets is not suitable for stretching tanks, but is ideal for decorative containers, easy-open lids, twisted lids, crown caps, composite tank end caps and three-piece cans. s material. The surface of the material is bright and beautiful, and once it is published, it really touched the tinplate container market. Because the embossed pattern on the surface is beautiful, the holographic trademark is truly three-dimensional. The production of holographic trademarks on metal cans is a trend. Currently, holographic trademarks have been produced on aluminum beer cans in countries such as Australia. Experts believe that etching holographic marks directly on steel plates will be popular all over the world in the near future. .
The company's Freilet company is the most famous supplier of polymer coated steel, and its products have been on the market for several years. When the polymer film is cemented to the surface of the steel sheet, the material must be melted and rapidly cooled, so that a very large adhesive force can be generated between the steel sheet and the PP or PPT, so that the barrier property is good, the corrosion resistance is strong, and the introduction is good. Note the packaging. Currently the most widely used is a spoon and a gel can. Another new type of coating material is the direct extrusion of resin onto steel sheets, which has been used in the production of food cans. At home and abroad, beverage cans and food cans are highly competitive areas, including tinplate cans, aluminum cans, PET and glass containers.
We print metal cans, generally only the can body, but there is a clear development trend at present, that is, color printing is also carried out at the can end. A neck-reducing canister that appears on the market today, with a striking black easy-open lid, allows for a wider continuation of the design. On the other hand, the development trend is that printing metal cans are no longer the only market for food and beverage cans. At present, the printing of other cans and barrels has been fully expanded, such as decorative paint series metal cans, metal barrels for building materials, Cans and so on. Nowadays, the most considered by the merchants is the packaging container of such a product. Even if the consumer spends a little more money, he can buy a package that can make the product unique on the shelf. For this, the decoration of metal cans is undoubtedly a fashion today.
There are also some new technological achievements on the metal cans, which have greatly expanded the use and function of the metal cans. For example, an ink that has recently appeared can change color with changes in temperature. In the past, this ink was only used on the outer label of the can, but now the thermometer can be printed directly onto the metal can, and there is also a touch sensitive ink that reacts with the underlying surface and causes the image to show physical changes. For example, it can be used to highlight changes in internal food.
Providing convenience to consumers is a matter of merchandise, and the metal packaging industry is no exception. The technology has improved, the opening of the cover has become very easy, the precision tools and materials have been greatly developed, so the metal cans must have a convenient opening trick, knowing that this is a classic constraint, because only the consumer is the most A group of identifying abilities.
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