Polyethylene bag in our life
Packaging material has always been an importantcomponent of the production process of any self-respecting company. The invention of the century - plastic materials - greatly facilitated the task of producers and traders.
Lightness, strength, moisture resistance,relative cheapness - very important indicators of packaging material. The polyethylene bag has so rapidly and firmly entered our life that, as it seems to us, we can no longer do without it.
For the first time the packing package was produced in 1957 inThe United States. It was used for packing sandwiches. Ten years later, already 30% of US bakery products were packaged in such packages. Then Western Europe was carried away by this packing, as a result of which in 1973 the production of packages reached 11.5 million units. In 2002, when the whole world was covered by a boom of polyethylene packaging, the total world output of these products was 4-5 trillion pieces per year. Leaders in the manufacture of the finest packing bags (4,5-5 microns) are China, Russia, countries of South-East Asia. A thin polyethylene bag is made of dense polyethylene (at low pressure) HD (so-called "rustling"). Sometimes high-density polyethylene is used, but low density (LD, LLD), then the packages look smooth. Nevertheless, such a thin bagging bag is characterized by increased strength.
Different, and therefore interesting
A polyethylene bag visually always attractsattention not only to children, but also to adults. This is facilitated by vivid applications on all sorts of topics. The four-color image applied to the bag, using the flexographic method, can serve as one of the relatively effective ways of self-promotion. Different types of this product are produced depending on their purpose: packing bag (transparent); package-shirt; package with handle loop, hole; bags for garbage (with dyes) like "T-shirts" or with lingering bands; branded packages (with a trademark). We will dwell on packages like "T-shirt". This type of product has acquired such a nickname for the characteristic cutting of the handles. Manufacturing of "shirt" packages dates back to 1982. They began to be produced later than other products of this category, but nevertheless firmly took the position of leaders, especially in the network of trading enterprises. There are also pnd- and pvd-packages. The production of PVD bags is based on polyethylene granules of high pressure, respectively, pnd - low pressure. Packages pvd - this is the packing material that we all use in everyday life (for small and medium packaging). A pond packages differ in that they are also used for large packages (up to 20-30 kg) and can also differ in their resistance to excessive loads and negative influence of the environment. Therefore, low pressure polyethylene is also used for the production of pressure pipes, fittings, cable sheaths.
Do not forget about the harm that causes the environmentpolyethylene bag. As a result of negligent use of polyethylene products, the Earth, figuratively speaking, is practically packed in it, and the entire living world on the planet feels the negative consequences of this (in particular, marine inhabitants take plastic for food). We must not forget that each kilogram of bags absorbs in the production process 1.2 kg of precious resource - crude oil. It is worth remembering that plastic can be used repeatedly: from the worked out polyethylene bags, sections for fences, fences, park benches and much more are made. It can be burned and generate electricity. It should be remembered that polyethylene is different - less toxic and even soluble.