Transcription of INEOS Polypropylene Processing Guide
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INEOS Polypropylene Processing Guide
Polypropylene Processing Guide 2 Table of Contents Introduction Part Design Wall thickness Design reinforcements Draft angle Shrinkage Sink marks Undercuts Integral hinges mold Design Sprue Runner shapes and layout Gate types Gate location Integral hinge gates mold temperature control Clamp requirements Knock outs Vents Material Selection Resin flow Molding Area Diagrams Antistat Nucleation Injection Molding Cylinder temperature Injection pressure Injection time mold temperature Cure time Back pressure Screw speed mold release Extrusion General Downstream Sheet Film Tape yarns Fiber Thermoforming / Solid Phase Forming Finishing Hot stamp printing Vacuum metalizing Surface treatment Gas flame Corona Discharge 3 3 5 6 7 8 9 10 10 11 Machining Properties Turning Chasing Sawing Drilling and tapping Milling and shaping Joining and Welding Methods Spin welding Hot gas w
easy mold release. Depending on the texture depth, the draft will be from 2 to 5 degrees for unfilled homopolymers and copolymers. Filled resins require more draft, ranging from 4 to 10 degrees. Moreover, their low shrinkage and high stiffness prevent the stripping of all but
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