Reduce raw material costs can be done not only by reducing the weight of the product. In most cases, a mixture of blowing products include not only basic material, but also supplements (usually dyes). As a percentage of additives in total weight of the product is not as large, usually 1-3%, manufacturers often do not attach much importance to their purchase costs. On the other hand, when a small percentage of additives by themselves cost quite expensive, many times expensive in terms of 1 kg compared with the basic polymer material. In this case, one thing is the price of titanium dioxide (a normal white dye), the other – the price of special dyes rare flowers from all sorts of visual effects (pearl luster, etc.). That is why, especially in the cosmetics industry, manufacturers of bottles today generally go on two-layer and three-layer technology. Coextrusion blow molding machine configured for two-or three-layered product can reduce the consumption of costly additives than 10 times, since these additives are included only in the thinnest outer layer of the bottle. For the production of bottles with special surfaces, such as soft touch, two-or three-layered method of production is almost mandatory, since expensive materials that form the surface, are introduced not as a supplement, but as a basic material.
Can imagine the difference in the cost of a bottle containing 5 or 10% of special material + rest mass of ordinary polyethylene bottles and 100%, consisting of a special polymer is very expensive. A three-layer technology for compared with two-layer provides a larger scale of economic efficiency. Three-layer bottle in its middle layer can contain more recycled materials than the standard 20-40%, obtained by grinding and spew marriage with the same production of the same bottle. In the middle layer can be placed or “flakes” from other products of the same company (regardless of color, because this layer is not visible), or secondary raw materials, purchased in the market from specialized processors at a lower price than the full primary raw material. Prospects and opportunities Multilayer Blown capacity opens up new opportunities for producers and consumers. Application recycled through a separate layer, except the obvious benefits for the manufacturer to save raw materials, encourages the development of an independent branch of reprocessing of polyolefin waste and selling high-quality “secondary housing” one of them. Using special plastic canister in the agro-economy eliminates the awkward on most parameters of metal containers. Multilayer bottles for food products make it possible significant increase in shelf life of products while simultaneously getting rid of preservatives, making the products more natural.
In particular, the 6-layer bottle based on polypropylene and evoh can keep the juice in During the year, and this, coupled with the possibility of a painless hot filling. Coextrusion blow molding is the only way to manufacture multi-layer bottles with the top pocket sealed aseptic filling; natural dairy products in these bottles can be stored for several months. As a result, barrier packaging and extended shelf life open up entirely new opportunities for retail and logistics marketing of food products. Summary of Today is invited to a sufficient number of options to optimize blow molding industries, to reduce costs while maintaining or improving quality. It is obvious that in order to advantage of these opportunities, you must first invest in them. To follow the path of production efficiency, the principle of “save, then to still save in the minds of enterprises will gradually be replaced the principle of “invest to reduce costs and increase efficiency.”.