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THE FACTS ABOUT PP DOUBLE WALL SHEETS COPOLYMER PP : Isolation polypropylene was discovered in 1954 by. Prof. G. Natta and his team. Industrial production began in 1957 at the Montecaniti plant in Ferrara. Other companies followed later, often under Montecatini licence. PP is produced from propylene (hydrocarbon gas derived from the distillation of petroleum) through poymerization with stereospecific catalysts. These are capable of binding numerous propylene molecules to one another during polymerization, so that a spiral shaped chain is created. The PP spiral molecule is made entirely of carbon and hydrojen atoms. When numerous spiral chains join up in the solid state, they from lamellar crystal structures that grow in a spherical way and create the so called "spherulites". Consequently the microscopic structure of a PP article consist of numerous spherulites. If very small spherical particles of ethylenepropylene rubber are dispersed in the continous matrix of the isotactic PP, we have the so called heterophasic copolymers. The rubber can be compounded into the matrix or else introduced by polymerizing ethylene with propylene. Heterophasic copolymers have a much higher breaking risk strength than isotactic PP, because the rubber particles absorb the energy of the impact. When ethylene based groups are inserted in the isotactic PP spiral chains (ethylene is also derived from petroleum distillation) then random copolymers occur, which are characterized, in comparison with isotactic PP, by : * similar impact strenght * greater elasticity * lower melting point and we specifically designed to give products with great transparency for use in the film and blowing sectors. Finally, three families of plastic materials can be optained from propylene through polymerization and they are : * isotactic polypropylene * heterophasic copolymer polypropylene * random copolymer polypropylene Due to the purity of the PP it can be used in the most "delicate" sectors, such as food and pharmaceuticals THICKNESS AND WEIGHT OF STANDART SHEETS
The table above shows standard thickness and weight of corrugated PP sheets. Also production in different weight / m² is avaible.
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