Propiedades polipropileno ingles

English 1

Polypropylene

Injection Molding Polypropylene

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Contents About Basell Introduction .................................................................................................................. ............................................................................................................................................................................................ 3 3 3 4 4 4 4 4 4 4 4 5 5 5 5 6 6

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Characteristics of polypropylene

I. Inherent physical and chemical properties .................................................... Low density ............................................................................................................... High temperature resistance........................................................................................ Chemical resistance .................................................................................................. Stress-crack resistance ............................................................................................... Weathering (UV resistance) ........................................................................................ Radiationsterilization ............................................................................................... Heavy metals ............................................................................................................. Other advantages ..................................................................................................... II. Mechanical properties...................................................................................... Stiffness .................................................................................................................... Impact strength ......................................................................................................... III. Long term creep IV. Flow properties................................................................................................ .................................................................................................

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Designing parts for polypropylene............................................................................. 8 I. Part design considerations.................................................................................. Wall thickness........................................................................................................... Ribs ............................................................................................................................ Radii .......................................................................................................................... Draft........................................................................................................................... Undercuts ................................................................................................................... Living hinges ............................................................................................................. Bosses....................................................................................................................... Holes ........................................................................................................................... II. Mold design considerations ........................................................................... Design of gates........................................................................................................... Gate location ............................................................................................................... Vent location ............................................................................................................. Cooling requirements ..................................................................................................