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Injection molding change-over

The response of melt viscosity to changes in shear rate over the range normally encountered in mixing, extrusion and injection molding is generally similar to that of thermoplastics such as polyethylene or polystyrene. Melt viscosities for a radial block polymer based on butadiene and styrene, an oil masterbatch and a compound based cn the masterbatch are shown in Figure 8. [Pg.9]

A standard injection molding machine equipped with typical reciprocating screw and barrel capacity of six or less shots can be utilized for over molding. A reciprocating screw generally delivers quick color change and provides smooth TPE... [Pg.153]

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Over-molding

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