Paper bags - plastic packaging knowledge about the

Plastic Category:
    Plastic according to its own performance points can be divided into : can be repeatedly melt- molding and to maintain the basic characteristics of the thermoplastic and thermosetting plastics can be one of two categories of melt molding . According to its use can be divided using a wide range of cheap, good overall performance of general-purpose plastics , such as PE, PP, PVC, PS, and amino plastics have good physical and mechanical strength , may replace the metal used in the construction machinery engineering plastics such as : ABS, nylon , polyester , POM, TPX-1 and the like. And having a particularly excellent properties in a certain class of engineering plastics , such as: having a particularly good radiation resistance, heat resistance , etc. of special plastics , such as: poly- sulfone , liquid crystal polymer . Crystalline thermoplastic resin according to the size of the molecule , can be divided into amorphous thermoplastic polymer and crystalline polymer types.
The main characteristics of plastics :
    The main characteristics of plastic are: first , low density , high strength , you can get a higher package yield, that is, " the quality of the packaging unit volume or the size of the second package , most plastics chemical resistance is good, there is . good acid and alkali resistance, various types of organic Rong agents, long-term placement , oxidation does not occur. third , easy molding , shaping energy required is less than steel and other metal materials. fourth , with good transparency, easy coloring of Fifth, with good strength, high strength properties per unit weight , impact resistance, easy modification sixth , low processing cost. Seventh, excellent insulation .
Plastic packaging industry developments:
    In synthesis, there are 25% for the packaging industry , for the plastic packaging industry, an important sector , is one of the four plastic packaging materials and packaging industry : paper and paperboard accounted for 30% , 25% plastic , metals accounted for 25 % glass and 15% . More than 25% of the two fully illustrate the importance of the plastic packaging industry. Although plastic packaging industry is the second packaging material , in fact, not as good as with the surface of paper and paperboard packaging. But the plastic packaging industry rate of 5% per annum in the development, and other packaging materials, including paper and paperboard, metal, glass, pottery Wa , cotton , etc. Only 2% of the rate of growth , for one day the plastic packaging industry will become the first one over paper and paperboard packaging materials.
Containers areas:
    In terms of packaging containers , originally packaged beverage containers are glass bottles followed by paper composite cans , PET bottles are then , and now has a rigid PET bottle carbonated drinks and non-carbonated beverages largest packaging materials , and accounted for in the United States in 1991 26.5% of the beverage containers , glass bottles by 1981 from 28.9 % down to 19.5% , aluminum 39% . And plastic bottles is growing at annual rate of more than 3% of rapid growth. To be sure , even in the plastic packaging industry most countries have been blamed . Plastic packaging materials will continue to be much faster than other speed in no segment development , because a lot of the characteristics of any other kind of plastic packaging material can not be replaced . Meanwhile in the plastic packaging industry has occupied the field of sales package has been developed to transport packaging, will eventually force the metal is still based " transport packaging " , mainly replaced by plastic .