Polyethylene- hdpe - Import export

HDPE – high density polyethylene is defined by a density of greater or equal to 0.941 g/cm3. HDPE has a low degree of branching and thus stronger intermolecular forces and tensile strength. HDPE can be produced by chromium/silica catalysts, ziegler-natta catalysts or metallocene catalysts. The lack of branching is ensured by an appropriate choice of catalyst and reaction conditions. HDPE is used in products and packaging such as milk jugs, detergent bottles, margarine tubs, garbage containers and water pipes. High-density polyethylene (HDPE) or polyethylene high-density (PEHD) is a polyethylene thermoplastic made from petroleum. It takes 1.75 kilograms of petroleum (in terms of energy and raw materials) to make one kilogram of HDPE. HDPE is commonly recycled, and has the number “2” as its recycling symbol.

Polypropylene ( PP ) is thermoplastis copolymer used in a wide variety of different applications including packaging, textiles, plastic parts and reusable containers. It is defined by a density range of 0.946 g/cm3 for crystalline. PP is resistant to many chemical solvents, bases and acids. Polypropylene is most commercial isotactic and has an intermediate level of crystallinity between that of low-density polyethylene (LDPE) and high-density polyethylene (HDPE). Polypropylene is normally tough and flexible, especially when copolymerized with ethylene. This allows polypropylene to be used as an engineering plastic, competing with materials such as ABS. Polypropylene is reasonably economical, and can be made transucent when uncolored but is not as readily made transparent as polystyrene, acrylic, or certain other plastics.